Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual
  1. Manuals
  2. Brands
  3. Schweitzer Engineering Laboratories Manuals
  4. Relays
  5. SEL-351-5
  6. Instruction manual
Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual

Schweitzer Engineering Laboratories SEL-351-5 Instruction Manual

Directional overcurrent relay reclosing relay fault locator integration element standard
Hide thumbs Also See for SEL-351-5:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
Table of Contents

Advertisement

Quick Links

See also: Instruction Manual
SEL-351-5, -6, -7
DIRECTIONAL OVERCURRENT RELAY
RECLOSING RELAY
FAULT LOCATOR
INTEGRATION ELEMENT STANDARD
INSTRUCTION MANUAL
SCHWEITZER ENGINEERING LABORATORIES, INC.
2350 NE HOPKINS COURT
PULLMAN, WA USA 99163-5603
TEL: (509) 332-1890
FAX: (509) 332-7990

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SEL-351-5 and is the answer not in the manual?

Questions and answers

Related Manuals for Schweitzer Engineering Laboratories SEL-351-5

Summary of Contents for Schweitzer Engineering Laboratories SEL-351-5

  • Page 1 SEL-351-5, -6, -7 DIRECTIONAL OVERCURRENT RELAY RECLOSING RELAY FAULT LOCATOR INTEGRATION ELEMENT STANDARD INSTRUCTION MANUAL SCHWEITZER ENGINEERING LABORATORIES, INC. 2350 NE HOPKINS COURT PULLMAN, WA USA 99163-5603 TEL: (509) 332-1890 FAX: (509) 332-7990...
  • Page 2 You may not copy, alter, disassemble, or reverse-engineer the software. You may not provide the software to any third party. All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. Schweitzer Engineering Laboratories, SEL , Connectorized, Job Done, SEL-PROFILE, SEL-5030...
  • Page 3 − Added subsection: Synchronism Check VS Connection (Global setting VSCONN = VS). − Added subsection: Broken-Delta VS Connection (Global setting VSCONN = 3V0). − Added subsection: Polarity Check for VSCONN = 3V0 Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 4 − Updated Figure 4.7 and Figure 4.8 (added Relay Word bit 3V0 input). − Updated Figure 4.12 through Figure 4.14. − Updated Figure 4.15 and Figure 4.16 (added 32VE, 32NE, 3V0 Relay Word inputs). Manual Change Information Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 5 − Added Figure 9.11. − Updated subsection: Potential Transformer Ratios and PT Nominal Secondary Voltage Settings. − Updated Settings Sheets 1, 2, 7, 8, 9, 10, 11, 14, 15, 24, 29. Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 6 − Updated A5C1 Fast Meter Configuration Block. − Updated A5D1 Fast Meter Data Block. − Updated A5D2/A5D3 Demand/Peak Demand Fast Meter Message. − Updated ID Message. − Updated DNA Message. Manual Change Information Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 7 Section 2: − Changed Figure 2.4 to a vertical panel-mount example. − Added connection diagrams (Figures 2.14 through 2.16) for high-impedance or low-impedance grounded, Petersen Coil grounded, and ungrounded systems. Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 8 50NFP, 50NRP, a0N, 59RES, 32WFP, 32WRP, and 32WD − Added S, P, and U (for low-impedance grounded, Petersen Coil grounded, and ungrounded/high-impedance grounded systems, respectively) to setting range for setting ORDER. Manual Change Information Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 9 − Added Caution, Danger, and Warning information to the back of the cover page of the Manual. − Replaced Standard Product Warranty page with warranty statement on cover page. Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 10 − Updated setting ranges for VINT, VSAG, and VSWELL on Settings Sheet 13. − Added ac setting choice to optoisolated input timers on Setting Sheets 20 and − Added phase-to-phase voltages to LDLIST settings choices on Settings Sheet viii Manual Change Information Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 11 − Corrected setting range for 59Q in Table 3.8. − Clarified description of synchronism check element logic. − Expanded setting range for 27B81P in Table 3.10. Section 4: − Corrected loss-of-potential positive-sequence (V1) reset threshold. Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 12 − Added AUTO = DTA setting choice to Port Settings Sheet. Section 10: − Added notes about powering-down the relay after setting the date or time. − Added DTA2 compatibility information. − Revised SEL-351-5, -6, -7 Command Summary. Section 12: − Added Table 12.1. Appendix A: −...
  • Page 13 Appendix G: − Added Target Logic to Table G.3. 991123 This revision includes the following changes: Appendix H: − Corrected documentation errors in DNP 3.00 Device Profile, page H-5. Date Code 20020426 Manual Change Information SEL-351-5, -6, -7 Instruction Manual...
  • Page 14 − Explained the MB8A and MB8B serial port protocol settings options for Mirrored B protocol operating on communication channels requiring an eight data bit format. Appendix J: − Extensively rewritten. 990721 Updated Appendix A: Firmware Versions. 990616 New Manual Release. Manual Change Information Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 15 Appendix H: Distributed Network Protocol (DNP) 3.00 Appendix I: M ™ IRRORED Appendix J: SEL-351 Unsolicited SER Protocol ® Appendix K: SEL-5030 ERATOR SECTION 15: SEL-351-5, -6, -7 RELAY COMMAND SUMMARY Date Code 20020426 Table of Contents SEL-351-5, -6, -7 Instruction Manual...

  • Page 17: Table Of Contents

    Figure 1.4: SEL-351 Relay Extra I/O Board (Model 0351x1, Screw-Terminal Block Version; Main Board Shown in Figure 1.2) ................. 1-9 Figure 1.5: SEL-351 Relay Communications Connections Examples ..........1-10 Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...

  • Page 19: Introduction And Specifications

    Figure 2.4. Though Figure 2.4 shows the extra I/O board (OUT201 through IN208) for model 0351x1, the vertically-mounted version of this model can be ordered without this extra I/O board (the space appears blank). Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...

  • Page 20: Potential Transformer Connections

    Also in firmware revisions numbered R309 or higher, the auxiliary voltage channel "VS" can be configured via global setting VSCONN = VS to accept a synchronism check or general-purpose Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 21: Instruction Manual Sections Overview

    • Load-encroachment logic and its application to phase overcurrent elements • Voltage-polarized and current-polarized directional elements, including directional control for low-impedance grounded, Petersen Coil grounded, and ungrounded/high-impedance grounded systems • Best Choice Ground Directional™ logic and automatic settings Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...
  • Page 22 The Settings Sheets can be photocopied and filled out to set the SEL-351 Relay. Note that these sheets correspond to the serial port SET commands listed in Table 9.1. Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 23 • Appendix K: SEL-5030 ® ERATOR Section 15: SEL-351 Relay Command Summary briefly describes the serial port commands that are described in detail in Section 10: Serial Port Communications and Commands. Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...

  • Page 24: Figure 1.1: Sel-351 Relays Applied Throughout The Power System

    PPLICATIONS Figure 1.1: SEL-351 Relays Applied Throughout the Power System Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 25: Hardware Connection Features

    Figure 1.2: SEL-351 Relay Inputs, Outputs, and Communications Ports (Models 0351x0, 0351x1, and 0351xY; Models 0351x1 and 0351xY Have an Extra I/O Board— See Figure 1.3 and Figure 1.4) Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...

  • Page 26: Figure 1.3: Sel-351 Relay Extra I/O Board (Model 0351Xy, Plug-In Connector Version; Main Board Shown In Figure 1.2)

    Section 2: Installation for more information on the polarity dependence of high-current interrupting output contacts. Figure 1.3: SEL-351 Relay Extra I/O Board (Model 0351xY, Plug-In Connector Version; Main Board Shown in Figure 1.2) Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 27 Section 2: Installation for more information on the polarity dependence of high-current interrupting output contacts. Figure 1.4: SEL-351 Relay Extra I/O Board (Model 0351x1, Screw-Terminal Block Version; Main Board Shown in Figure 1.2) Date Code 20020426 Introduction and Specifications SEL-351-5, -6, -7 Instruction Manual...

  • Page 28: Communications Connections

    OMMUNICATIONS ONNECTIONS See Port Connector and Communications Cables in Section 10: Serial Port Communications and Commands for more communications connections information. Figure 1.5: SEL-351 Relay Communications Connections Examples 1-10 Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 29: General Specifications

    (see Table 4.1). The 0.2 A nominal channel can also provide non-directional sensitive earth fault (SEF) protection. The 0.05 A nominal neutral channel IN option is rather a legacy non- directional SEF option. Date Code 20020426 Introduction and Specifications 1-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 30 L/R = 40 ms 48 V 10 A L/R = 40 ms 125 V 10 A L/R = 40 ms 250 V 10 A L/R = 20 ms 1-12 Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 31 2200 Vdc for 1 second on EIA-485 Communications Port. 2500 Vac for 1 second on contact inputs, contact outputs, and analog inputs. 3100 Vdc for 1 second on power supply. Date Code 20020426 Introduction and Specifications 1-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 32 IEC 60255-22-2: 1996 Electrical disturbance tests for measuring relays ESD Test and protective equipment, Section 2: Electrostatic discharge tests, Severity Level 4 (Equipment is tested at both polarities at levels 1, 2, 3, 4) (type test). 1-14 Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 33: Processing Specifications

    ±5% of pickup Time Delay: 0.00–16,000.00 cycles, 0.25-cycle steps Timer Accuracy: ±0.25 cycle and ±0.1% of setting See pickup and reset time curves in Figure 3.5 and Figure 3.6 Date Code 20020426 Introduction and Specifications 1-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 34 {300V inputs} Open-delta connected (when available, by Global setting PTCONN=DELTA): 0.00–60.00 V, 0.01 V steps (negative-sequence elements) {150V inputs} 0.00–120.00 V, 0.01 V steps (negative-sequence elements) {300V inputs} 1-16 Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 35: Under- And Overfrequency Elements

    Pickup and dropout accuracy for all timers: ±0.25 cycle and ±0.1% of setting Substation Battery Voltage Monitor Pickup Range: 20–300 Vdc, 1 Vdc steps Pickup Accuracy: ±2% of setting, ±2 Vdc Date Code 20020426 Introduction and Specifications 1-17 SEL-351-5, -6, -7 Instruction Manual...

  • Page 36: Metering Accuracy

    ±30° or ±150° 1.50% / 1.50% ±45° or ±135° 2.00% / 1.00% ±60° or ±120° 6.50% / 0.75% ±82° or ±98° - / 0.70% ±90° (power factor = 0) 1-18 Introduction and Specifications Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 37: Power Element Accuracy

    Open-delta connected voltages (PTCONN = DELTA), with properly configured broken-delta 3V0 connection (VSCONN = 3V0): any conditions • Open-delta connected voltages, without broken-delta 3V0 connection (VSCONN = VS): balanced conditions only Date Code 20020426 Introduction and Specifications 1-19 SEL-351-5, -6, -7 Instruction Manual...

  • Page 39: Table Of Contents

    “Extra Alarm” Output Contact Control Jumper ..............2-36 Password and Breaker Jumpers ..................2-37 EIA-232 Serial Port Voltage Jumpers ................2-38 Condition of Acceptability for North American Product Safety Compliance.... 2-38 Clock Battery........................2-39 Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...
  • Page 40 Figure 2.20: SEL-351 Relay Provides Overcurrent Protection for an Ungrounded System (Wye- Connected PTs)......................2-28 Figure 2.21: SEL-351 Relay Provides Overcurrent Protection for an Ungrounded System (Delta- Connected PTs, Broken-Delta 3V0 Connection)............2-29 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 41 I/O Board (Models 0351xY, Plug-In Connector Version) .......... 2-34 Figure 2.26: Jumper, Connector, and Major Component Locations on the SEL-351 Relay Extra I/O Board (Model 0351x1, Screw-Terminal Block Version) ........2-35 Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...

  • Page 43: Installation

    SECTION 2: INSTALLATION ELAY OUNTING Figure 2.1: SEL-351 Relay Dimensions for Rack-Mount and Panel-Mount Models Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...

  • Page 44: Rear-Panel Connection Diagrams

    I/O. All 2-U rack height SEL-351-5, -6, -7 models are equipped with terminal blocks only. Other members of the SEL-351 family may be available in a 2-U rack height with plug-in connectors. For model options, view the SEL-351 Model Option Tables on our web site or contact your local SEL sales representative.
  • Page 45 Figure 2.2: SEL-351 Relay Front- and Rear-Panel Drawings—Model 0351x0 Rear and Model 0351x0H Front; Horizontal Rack-Mount Example Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...
  • Page 46 Figure 2.3: SEL-351 Relay Front- and Rear-Panel Drawings—Model 0351x1xxxxx2 Rear and Models 0351x1H and 0351xYH Front; Horizontal Rack-Mount Example Rear-panel drawing shows standard output contacts on extra I/O board terminals (no polarity markings). Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 47 Figure 2.4: SEL-351 Relay Front- and Rear-Panel Drawings—Model 0351xYxxxxx6 Rear and Models 0351x14 and 0351xY4 Front; Vertical Panel-Mount Example Rear panel drawing shows high-current interrupting output contacts on extra I/O board terminals (with polarity markings). Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...

  • Page 48: Making Rear-Panel Connections

    • (2) 8-position female plug-in connectors for output contacts OUT101 through ALARM. • (2) 6-position female plug-in connectors for optoisolated inputs IN101 through IN106. • (1) 8-position female plug-in connectors for EIA-485/IRIG-B Serial Port 1. Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 49 • (1) spade connector for GROUND connection (chassis ground). These prewired connectors (and the serial port connector) are unique and may only be installed in one orientation. Figure 2.5: SEL-351 Relay Plug-In Connector Coding (Top View; Model 0351xY) Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...

  • Page 50: Models 0351X0 And 0351X1 (Screw-Terminal Blocks)

    Model 0351x0 can be ordered with standard output contacts only. Refer to General Specifications in Section 1: Introduction and Specifications for output contact ratings. Standard output contacts are not polarity dependent. Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 51: Models 0351X1 And 0351Xy

    4 mA of current. Refer to General Specifications in Section 1: Introduction and Specifications for optoisolated input ratings. Inputs can be configured to respond to ac or dc control signals via Global settings IN101D– IN106D and IN201D–IN208D. Date Code 20020426 Installation SEL-351-5, -6, -7 Instruction Manual...

  • Page 52: Current Transformer Inputs

    Note the signal labels (VA, VB, VC, N, VS, NS) on terminals Z09 through Z14. Figure 1.2 shows the internal connection for terminals VA, VB, VC, and N. Note also that VS/NS is a separate single-phase voltage input. 2-10 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 53: Models 0351X0 And 0351X1

    (or higher) indicates “300 V Wye/Delta”. The part number sticker on previously manufactured SEL-351-5, -6, -7 relays indicates “150 V Wye” or “300 V Wye,” depending on the actual part number. If older SEL-351-5, -6, -7 relays (with firmware revisions R300 through R308) are upgraded to R309 (or higher) firmware, they too can be wye-connected or delta-connected, provided that the voltage rating is not exceeded.

  • Page 54: Synchronism Check Vs Connection (Global Setting Vsconn = Vs)

    Synchronism Check Elements in Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements. SEL-351-5, -6, -7 Relays with firmware revisions up to and including R308 function as if VSCONN = VS, although global setting VSCONN is not actually available in these relays.

  • Page 55: Polarity Check For Vsconn = 3V0

    Figure 2.7 shows the resultant voltage V , with respect to the wye-connected power system voltages connected to the voltage inputs VA, VB, VC (ABC rotation used in this example). Date Code 20020426 Installation 2-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 56 Note: “3V0” in the METER command (via serial port or front panel) is derived internally from the VA, VB, and VC voltage inputs, not from voltage input VS, regardless of setting VSCONN. 2-14 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 57: Delta-Connected Pt Example

    V is 30 degrees (again, within a few degrees), then the secondary wires from the broken-delta secondary in Figure 2.8 need to be swapped in connection to terminals VS—NS. Date Code 20020426 Installation 2-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 58 For connecting devices at distances over 100 feet, SEL offers fiber-optic transceivers. The SEL-2800 family of transceivers provides fiber-optic links between devices for electrical isolation and long distance signal transmission. Contact SEL for further information on these products. 2-16 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 59: Serial Ports

    A demodulated IRIG-B time code can be input into the connector for Serial Port 1 on models 0351x0, 0351x1, and 0351xY (see Table 10.3). If demodulated IRIG-B time code is input into this connector, it should not be input into Serial Port 2 and vice versa. Date Code 20020426 Installation 2-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 60 I Figure 2.10: SEL-351 Relay Provides Overcurrent Protection and Reclosing for a Utility Distribution Feeder (Includes Fast Bus Trip Scheme)(Wye-Connected PTs) 2-18 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 61 (serial port communications, optoisolated input assertion, etc.), with desired supervision (e.g., synchronism check). Figure 2.11: SEL-351 Relay Provides Overcurrent Protection for a Distribution Bus (Includes Fast Bus Trip Scheme)(Wye-Connected PTs) Date Code 20020426 Installation 2-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 62 ). But in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.12: SEL-351 Relay Provides Directional Overcurrent Protection and Reclosing for a Transmission Line (Wye-Connected PTs) 2-20 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 63 I = 3I Figure 2.13: SEL-351 Relay Provides Directional Overcurrent Protection and Reclosing for a Transmission Line (Current-Polarization Source Connected to Channel IN) (Wye-Connected PTs) Date Code 20020426 Installation 2-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 64 Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements. See also the note following Table 4.1. Figure 2.14: SEL-351 Relay Provides Overcurrent Protection for a Delta-Wye Transformer Bank (Wye-Connected PTs) 2-22 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 65 (serial port communications, optoisolated input assertion, etc.), with desired supervision (e.g., hot bus check). Figure 2.15: SEL-351 Relay Provides Overcurrent Protection for a Transformer Bank With a Tertiary Winding (Wye-Connected PTs) Date Code 20020426 Installation 2-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 66 Section 3: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements. See also the note following Table 4.1. Figure 2.16: SEL-351 Relay Provides Overcurrent Protection for an Industrial Distribu- tion Feeder (Core-Balance Current Transformer Connected To Channel IN) 2-24 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 67 = 3I ). But in this residual connection example, the neutral ground and residual ground overcurrent elements operate the same because I Figure 2.17: SEL-351 Relay Provides Dedicated Breaker Failure Protection Date Code 20020426 Installation 2-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 68 Directional control for a high-impedance grounded system is selected with setting ORDER=U (see Table 4.1 through Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.18: SEL-351 Relay Provides Overcurrent Protection for a High-Impedance or Low-Impedance Grounded System (Wye-Connected PTs) 2-26 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 69 Directional control for a Petersen Coil grounded system is selected with setting ORDER containing P (see Table 4.1 through Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.19: SEL-351 Relay Provides Overcurrent Protection for a Petersen Coil Grounded System (Wye-Connected PTs) Date Code 20020426 Installation 2-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 70 Directional control for an ungrounded system is selected with setting ORDER=U (see Table 4.1 through Table 4.3). Nondirectional sensitive earth fault (SEF) protection is also available. Figure 2.20: SEL-351 Relay Provides Overcurrent Protection for an Ungrounded System (Wye-Connected PTs) 2-28 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 71 The polarity of the VS-NS connection should be verified prior to placing the relay into service. See Polarity Check for VSCONN = 3V0 earlier in this section for a suggested procedure. Figure 2.21: SEL-351 Relay Provides Overcurrent Protection for an Ungrounded System (Delta-Connected PTs, Broken-Delta 3V0 Connection) Date Code 20020426 Installation 2-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 72 I Figure 2.22: SEL-351 Relay Provides Overcurrent Protection and Reclosing for a Utility Distribution Feeder (Delta-Connected PTs and Line-to-Ground Synch-Check Connection) 2-30 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 73 I Figure 2.23: SEL-351 Relay Provides Underfrequency Load Shedding, Overcurrent Protection, and Reclosing for a Utility Distribution Feeder (Single Voltage Connection) Date Code 20020426 Installation 2-31 SEL-351-5, -6, -7 Instruction Manual...

  • Page 74: Circuit Board Connections

    10. Replace any cables previously connected to serial ports. 11. Replace any rear-panel connectors removed in step 5. 12. Reenergize the relay. On Connectorized versions, replace the power connector at rear-panel terminals Z25 and Z26. 2-32 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 75 Figure 2.24: Jumper, Connector, and Major Component Locations on the SEL-351 Relay Main Board (Models 0351x0, 0351x1, and 0351xY) Date Code 20020426 Installation 2-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 76 Figure 2.25: Jumper, Connector, and Major Component Locations on the SEL-351 Relay Extra I/O Board (Models 0351xY, Plug-In Connector Version) 2-34 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 77 Figure 2.26: Jumper, Connector, and Major Component Locations on the SEL-351 Relay Extra I/O Board (Model 0351x1, Screw-Terminal Block Version) Date Code 20020426 Installation 2-35 SEL-351-5, -6, -7 Instruction Manual...

  • Page 78: Applications

    ALARM output contact. With the jumper in one position, the output contact operates regularly. With the jumper in the other position, the output contact is driven by the same signal that operates the dedicated ALARM output contact (see Table 2.4). 2-36 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 79: Password And Breaker Jumpers

    Table 2.5: Password and Breaker Jumper Positions for Standard Relay Shipments SEL-351 Password Jumper/Position Breaker Jumper/Position Relay Model (for standard relay (for standard relay Reference Number shipments) shipments) Figures 0351x0 JMP6-A = OFF JMP6-B = ON Figure 2.24 0351x1 0351xY Date Code 20020426 Installation 2-37 SEL-351-5, -6, -7 Instruction Manual...

  • Page 80: Eia-232 Serial Port Voltage Jumpers

    To meet product safety compliance for end-use applications in North American, use an external fuse rated 3 A or less in-line with the +5 Vdc source on pin 1. SEL Fiber-optic transceivers include a fuse that meets this requirement. 2-38 Installation Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 81: Clock Battery

    Reassemble the relay as described in Accessing the Relay Circuit Boards. Set the relay date and time via serial communications port or front panel (see Section 10: Serial Port Communications and Commands or Section 11: Front-Panel Interface, respectively). Date Code 20020426 Installation 2-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 83 Operation of Single-Phase Time-Overcurrent Elements (51AT, 51BT, 51CT) ..3-21 Neutral Ground Time-Overcurrent Element............... 3-23 Settings Ranges......................3-24 Accuracy........................3-24 Residual Ground Time-Overcurrent Element..............3-24 Settings Ranges......................3-25 Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...
  • Page 84 Voltage Sag Elements ......................3-53 Voltage Swell Elements ..................... 3-53 Voltage Interruption Elements ................... 3-54 Voltage Sag, Swell, and Interruption Elements Settings............ 3-54 Positive-Sequence Reference Voltage, Vbase..............3-55 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 85 Figure 3.7: Levels 1 Through 4 Phase-to-Phase Instantaneous Overcurrent Elements......3-9 Figure 3.8: Levels 1 Through 4 Neutral Ground Instantaneous/Definite-Time Overcurrent Elements (With Directional Control Option)............... 3-10 Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...
  • Page 86 Figure 3.39: SEL-351(B) Relay Provides VAR Control for 9600 kVAR Capacitor Bank ....3-65 Figure 3.40: Per Unit Setting Limits for Switching 9600 kVAR Capacitor Bank On- and Off-Line ..3-66 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 87: Overcurrent, Voltage, Synchronism Check, Frequency, And Power Elements

    ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...
  • Page 88 Figure 3.1: Levels 1 through 4 Phase Instantaneous Overcurrent Elements Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 89: Pickup Operation

    Ideally, set 50P1P > 50P2P > 50P3P > 50P4P so that instantaneous overcurrent elements 67P1 through 67P4 will display in an organized fashion in event reports (see Figure 3.3 and Table 12.3). Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...
  • Page 90 Figure 3.3: Levels 1 through 4 Phase Instantaneous/Definite-Time Overcurrent Elements (With Directional Control Option) Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 91: Directional Control Option

    67P1TC = IN105 Input IN105 deasserted (67P1TC = IN105 = logical 0): Then phase instantaneous/definite-time overcurrent elements 67P1/67P1T are defeated and nonoperational, regardless of any other setting. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 92: Combined Single-Phase Instantaneous Overcurrent Elements

    4 ms (0.25 cycle for a 60 Hz relay; 0.20 cycle for a 50 Hz relay). If instantaneous overcurrent elements are made directional, the pickup time curve in Figure 3.5 is adjusted as follows: Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 93 Figure 3.5: SEL-351 Relay Nondirectional Instantaneous Overcurrent Element Pickup Time Curve Maximum Minimum Applied Current (Multiples of Pickup Setting) Figure 3.6: SEL-351 Relay Nondirectional Instantaneous Overcurrent Element Reset Time Curve Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 94: Phase-To-Phase Instantaneous Overcurrent Elements

    Figure 3.1, Figure 3.2, and Figure 3.3 in the preceding Phase Instantaneous/Definite-Time Overcurrent Elements subsection, substituting current I (channel IN current) for phase currents and substituting like settings and Relay Word bits. Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 95 Figure 3.7: Levels 1 Through 4 Phase-to-Phase Instantaneous Overcurrent Elements Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements SEL-351-5, -6, -7 Instruction Manual...
  • Page 96 Figure 3.8: Levels 1 Through 4 Neutral Ground Instantaneous/Definite-Time Overcurrent Elements (With Directional Control Option) 3-10 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 97 Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting Pickup and Reset Time Curves See Figure 3.5 and Figure 3.6. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 98 The different levels are enabled with the E50G enable setting, as shown in Figure 3.10 and Figure 3.11. Figure 3.10: Levels 1 Through 4 Residual Ground Instantaneous/Definite-Time Overcurrent Elements (With Directional Control Option) 3-12 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 99 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 100 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Timer: ±0.25 cycles and ±0.1% of setting Transient Overreach: ±5% of setting 3-14 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 101 Pickup and Reset Time Curves See Figure 3.5 and Figure 3.6. Figure 3.12: Levels 1 Through 4 Negative-Sequence Instantaneous/Definite-Time Overcurrent Elements (With Directional Control Option) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-15 SEL-351-5, -6, -7 Instruction Manual...

  • Page 102: Time-Overcurrent Elements

    The following is an example of 51PT element operation. The other phase time-overcurrent elements operate similarly (note the similarity among the logic in Figure 3.14, Figure 3.15, Figure 3.16, and Figure 3.17). 3-16 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 103 0. See Section 9: Setting the Relay for additional time-overcurrent element setting information. Figure 3.14: Phase Time-Overcurrent Element 51PT (With Directional Control Option) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 104 = 0 (logical 0), if I > pickup setting 51PP and the phase time-overcurrent element is timing or is timed out on its curve 3-18 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 105 51PTC has to be considered in the control of logic point TCP (and, thus, in the control of the Torque Control Switch and phase time-overcurrent element 51PT). Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 106 Relay Word bit 51PR (reset indication) = logical 0. If the phase time-overcurrent element times out on its curve, Relay Word bit 51PT (curve time-out indication) = logical 1. 3-20 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 107 Table 3.2. Figure 3.15: A-Phase Time-Overcurrent Element 51AT (With Directional Control Option) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 108 Figure 3.16: B-Phase Time-Overcurrent Element 51BT (With Directional Control Option) Figure 3.17: C-Phase Time-Overcurrent Element 51CT (With Directional Control Option) 3-22 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 109 Relay Word bits. See Table 4.1 and the accompany note for a list of the directional features available with each neutral channel (IN) rating. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 110 Phase Time-Overcurrent Elements subsection, substituting residual ground current I = 3I ) for maximum phase current I and substituting like settings and Relay Word bits. 3-24 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 111 (e.g., 51GTC) cannot be set directly to OGIC logical 0. See Section 9: Setting the Relay for additional time-overcurrent element setting information. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 112 = 1 ∠ 120° and a = 1 ∠ -120°] for maximum phase current I and like settings and Relay Word bits. 3-26 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 113 ±0.01 A secondary and ±3% of setting (1 A nominal phase current inputs, IA, IB, IC) Curve Timing: ±1.50 cycles and ±4% of curve time for currents between (and including) 2 and 30 multiples of pickup Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 114 Note: Voltage element pickup settings should not be set near zero, because they can assert or deassert due to noise when no signal is applied. SEL recommends a minimum setting of 2.00 V. 3-28 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 115 0.00–200.00 V secondary {300 V voltage inputs} 59V1 59V1P 0.00–150.00 V secondary {150 V voltage inputs} 0.00–300.00 V secondary {300 V voltage inputs} Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 116 0.00–120.00 V secondary {300 V voltage inputs} 59V1 59V1P 0.00–85.00 V secondary {150 V voltage inputs} 0.00–170.00 V secondary {300 V voltage inputs} 3-30 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 117 Figure 3.21: Single-Phase and Three-Phase Voltage Elements (Wye-Connected PTs) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-31 SEL-351-5, -6, -7 Instruction Manual...
  • Page 118 Figure 3.22: Phase-to-Phase and Sequence Voltage Elements (Wye-Connected PTs) 3-32 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 119 Figure 3.23: Phase-to-Phase Voltage Elements (Delta-Connected PTs) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 120 . The logic outputs in Figure 3.21 are the following Relay Word bits: 27A1 = 1 (logical 1), if V < pickup setting 27P1P ≥ pickup setting 27P1P = 0 (logical 0), if V 3-34 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 121 (if the settings are applicable). If the weak-infeed portion of the POTT logic is not enabled, these voltage elements can be used in any desired application. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-35 SEL-351-5, -6, -7 Instruction Manual...

  • Page 122: Synchronism-Check Elements

    , or V ), an angle setting is made with the SYNCP setting (see Table 3.10 and the SYNCP setting discussion that follows). 3-36 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 123 , or V , it is most straightforward to have the angle setting choices (0, 30, …, 300, or 330 degrees) referenced to V Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-37 SEL-351-5, -6, -7 Instruction Manual...
  • Page 124 VB-N (or VB-VC for delta) is synchronism checked with the voltage across terminals VS-NS (see Figure 1.2, Figure 2.10 through Figure 2.13, Figure 2.22, and Figure 2.23). 3-38 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 125 Figure 3.26: Synchronism Check Voltage Window and Slip Frequency Elements Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 126 In most applications, all three voltage inputs VA, VB, and VC are connected to the three-phase power system and no additional connection concerns are needed for voltage connection VA-N (or 3-40 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 127 25VLO and 25VHI 59VS indicates that voltage V is within voltage window setting limits 25VLO and 25VHI Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-41 SEL-351-5, -6, -7 Instruction Manual...
  • Page 128 ). Both voltages are thought of as revolving phasor-wise, so the “slipping” of V past V is the relative revolving of V past V 3-42 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 129 The Angle Difference Calculator calculates the angle difference between voltages V and V Angle Difference = (∠V – ∠V ) Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-43 SEL-351-5, -6, -7 Instruction Manual...
  • Page 130 Figure 3.28: Angle Difference Between V and V Compensated by Breaker Close Time < f and V Shown as Reference in This Example) 3-44 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 131 . In order to initiate circuit breaker closing when V is in phase with V (Angle Difference = 0 degrees), V * has to slip around another revolution, relative to V Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-45 SEL-351-5, -6, -7 Instruction Manual...
  • Page 132 Refer to the top of Figure 6.2 in Section 6: Close and Reclose Logic. If timer 79CLSD is set to zero (79CLSD = 0.00), SEL control equation setting 79CLS (Reclose Supervision) is OGIC 3-46 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 133 A single output contact (e.g., OUT102 = CLOSE) can provide the close function for both automatic reclosing and manual closing (see Figure 6.1 logic output). Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-47 SEL-351-5, -6, -7 Instruction Manual...
  • Page 134 Figure 3.29: Undervoltage Block for Frequency Elements (Group setting VNOM ≠ ≠ ≠ ≠ OFF) Figure 3.30: Undervoltage Block for Frequency Elements (Group setting VNOM = OFF) 3-48 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 135 Figure 3.31: Levels 1 Through 6 Frequency Elements Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-49 SEL-351-5, -6, -7 Instruction Manual...
  • Page 136 Note that pickup settings 81D1P through 81D6P are compared to setting NFREQ. NFREQ is the nominal frequency setting (a global setting), set to 50 or 60 Hz. 3-50 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 137 = logical 1 (instantaneous element) 81D1T = logical 1 (time delayed element) Relay Word bit 81D1T asserts to logical 1 only after time delay 81D1D. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-51 SEL-351-5, -6, -7 Instruction Manual...
  • Page 138 The instantaneous frequency elements (81D1 through 81D6) are used in testing only. The time-delayed frequency elements (81D1T through 81D6T) are used for underfrequency load shedding, frequency restoration, and other schemes. 3-52 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 139 SW Relay Word bit for that phase (or phase-to-phase pair) asserts (SWA, SWB, or SWC, wye-connected; SWAB, SWBC, SWCA, delta-connected). Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-53 SEL-351-5, -6, -7 Instruction Manual...
  • Page 140 The settings ranges for the SSI thresholds are shown in Table 3.12. The factory default settings match the Interruption, Sag, and Swell definitions in IEEE Standard 1159-1995 “Classifications of RMS Variations.” 3-54 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 141: Vbase Thermal Element Block

    (three-phase interruption). To illustrate the dynamic nature of the VSSI thresholds, the Interrupt, Sag, and Swell pickup levels are also Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-55 SEL-351-5, -6, -7 Instruction Manual...

  • Page 142: Vbase Initialization

    During initialization, the SSI elements are deasserted and the SSI Recorder is disabled until all of the following conditions are met: • |V1| > |3V2| (correct phase rotation check) • |V1| > |3V0| (correct phase connection check)(wye-connected only) 3-56 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 143: Vbase Tracking Range

    See Reset the SSI Recorder Logic in Section 12: Standard Event Reports, Sag/Swell/- Interruption Report, and SER for more details. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-57 SEL-351-5, -6, -7 Instruction Manual...

  • Page 144: Power Elements (Available In Firmware Version 7)

    PWR1T, PWR2T, Power element type +WATTS, -WATTS, PWR3T, PWR4T +VARS, -VARS PWR1D, PWR2D, Power element time 0.00–16000 cycles, in 0.25-cycle steps PWR3D, PWR4D delay 3-58 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 145: Power Element Time Delay Setting Considerations

    SEL control equation settings: OGIC TR = ... + ... + SV1T + 67P1T SV1 = 3PWR1 * !67P1 Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-59 SEL-351-5, -6, -7 Instruction Manual...

  • Page 146: Accuracy

    PWRnT = +WATTS or -WATTS) or power factor = 0 (for PWRnT = +VARS or - VARS)(1 A nominal phase current inputs, IA, IB, IC) 3-60 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 147: Single-Phase Power Element Calculations

    (either |3V0| = 0, or |3I0| = 0, or both). For unbalanced conditions, the three-phase power element value will include an error term that is proportional to the amount of unbalance. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-61 SEL-351-5, -6, -7 Instruction Manual...

  • Page 148: Power Elements Logic Operation

    = 1 A sec or 5 A sec Repeat for Phases B and C 0.1⋅I 10 V sec DWG: M351196 Figure 3.36: Single-Phase Power Elements Logic (+VARS Example Shown) 3-62 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 149 • Figure 3.37: Three-Phase Power Elements Logic Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-63 SEL-351-5, -6, -7 Instruction Manual...
  • Page 150 -VARS are chosen with setting PWRnT, the corresponding real or reactive power values have to be multiplied by -1 so that element PWRAn asserts for negative real or reactive power. 3-64 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 151: Power Elements Application-Var Control For A Capacitor Bank

    SEL-351(C) Relay trips circuit breaker 52-C for a fault in the capacitor bank—no automatic closing can then take place. Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-65 SEL-351-5, -6, -7 Instruction Manual...
  • Page 152 The capacitor bank is put on-line at the 0.3 per unit VAR level (lagging) on the bus. The per unit VAR level immediately changes to the -0.7 per unit VAR level (leading) when the capacitor bank 3-66 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 153: Settings For Three-Phase Power Elements

    Following the single-phase derivation, the resulting power element setting values need to be multiplied by three. EPWR = 3P2 3PWR1P = 72.0 PWR1T = +VARS PWR1D = _____ Date Code 20020426 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-67 SEL-351-5, -6, -7 Instruction Manual...
  • Page 154 PWR1D = _____ The exact implementation of this capacitor close and trip logic in SEL control equations in OGIC the SEL-351(B) Relay is not shown. 3-68 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 155 50QFP—Forward Directional Negative-Sequence Current Pickup ......4-43 50QRP—Reverse Directional Negative-Sequence Current Pickup ......4-43 50QFP and 50QRP Set Automatically..............4-43 a2—Positive-Sequence Current Restraint Factor, I ..........4-44 a2 Set Automatically................... 4-44 Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 156 Figure 4.6: Internal Enables (32QE and 32QGE) Logic for Negative-Sequence Voltage- Polarized Directional Elements ................... 4-18 Figure 4.7: Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IN Current-Polarized Directional Elements ..........4-19 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 157 Figure 4.27: Zero-Sequence Impedance Network for Ground Fault on Feeder 1 ........4-52 Figure 4.28: Wattmetric Element Operation for Ground Fault on Feeder 1........... 4-53 Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 159: Loss-Of-Potential, Load Encroachment, And Directional Element Logic

    Loss-of-potential is declared (Relay Word bit LOP = logical 1) when a 10% or larger drop in V is detected, with no corresponding change in I or I . If the LOP condition persists for 60 cycles, it latches in. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 160: Setting Vnom = Off

    (see Figure 4.15, Figure 4.16, and Figure 4.22). These direction forward overcurrent elements effectively become nondirectional and provide overcurrent protection during a loss-of-potential condition. Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 161: Setting Elop = N

    This runs the risk of tripping on bus load current. The load-encroachment feature prevents this from happening as shown in the example that follows in this subsection. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 162 ZLIN asserts to logical 1 when the load lies within this hatched region. Relay Word bit ZLOAD is the OR-combination of ZLOUT and ZLIN: ZLOAD = ZLOUT + ZLIN Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 163: Settings Ranges

    132800 V primary • (1/PT ratio) = 132800 V primary • (1 V secondary/2000 V primary) = 66.4 V secondary Now, calculate the equivalent secondary impedance: 66.4 V secondary/5.03 A secondary = 13.2 Ω secondary Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 164: Convert Power Factors To Equivalent Load Angles

    Setting PLAR = 180° – cos (0.80) = 180° – 37° = 143° Setting NLAR = 180° + cos (0.95) = 180° + 18° = 198° Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 165: Apply Load-Encroachment Logic To A Nondirectional Phase Time-Overcurrent

    !LOP in a torque control setting. This also effectively happens in the directional element in Figure 4.21, where ZLOAD and LOP are part of the logic. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 166: Use Sel-321 Relay Application Guide For The Sel-351 Relay

    • Zero-sequence voltage-polarized directional element (low-impedance grounded system) • Wattmetric and incremental conductance directional elements (Petersen Coil grounded system) • Zero-sequence voltage-polarized directional element (ungrounded/high-impedance grounded system) Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 167 Figure 4.4: General Logic Flow of Directional Control for Neutral Ground and Residual Ground Overcurrent Elements (Excluding Ungrounded/High-Impedance Grounded Systems) Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 168: Internal Enables

    (Petersen Coil) be listed together Zero-sequence 32NE 2.18, 2.20, 2.21, in the ORDER voltage-polarized (Ungrounded/ 4.8, 4.14 setting (Ungrounded/ High-Impedance) High-Impedance) 4-10 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 169 (Petersen Coil) are the last (or 32VE 32NE only) listed (Petersen Coil) choice for the 32VE 32QGE 32NE ORDER (Petersen Coil) setting 32NE (Ungrounded/ High-Impedance) Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 170 Best Choice Ground Directional™ logic control. See the discussion on setting ORDER in the following subsection Directional Control Settings. 4-12 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 171: Switch Between I

    I (5 A secondary): CTR/CTRN < (5 A/0.05 A) = 100 (5 A nominal) CTR/CTRN < (5 A/0.01 A) = 500 (1 A nominal) Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-13 SEL-351-5, -6, -7 Instruction Manual...

  • Page 172: Zero-Sequence Voltage Sources

    (global setting PTCONN = DELTA), 3V cannot be calculated from the VA, VB, and VC terminals, and the directional elements that require zero-sequence voltage are unavailable. 4-14 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 173: Best Choice Ground Directional™ Logic

    “Review of Ground Fault Protection Methods for Grounded, Ungrounded, and Compensated Distribution System,” by Jeff Roberts, Hector Altuve, Daqing Hou, presented at the Annual Western Protective Relay Conference, Spokane, Washington, October 22–24, 2001. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-15 SEL-351-5, -6, -7 Instruction Manual...

  • Page 174: Directional Element Routing

    Table 4.4 shows the overcurrent elements that are controlled by each level direction setting. Note in Table 4.4 that all the time-overcurrent elements (51_T elements) are controlled by the DIR1 level direction setting. 4-16 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 175 Subsection Directional Control Provided by Torque Control Settings at the end of this section describes how to avoid this limitation for special cases. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 176 Figure 4.6: Internal Enables (32QE and 32QGE) Logic for Negative-Sequence Voltage- Polarized Directional Elements 4-18 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 177 Figure 4.7: Internal Enables (32VE and 32IE) Logic for Zero-Sequence Voltage-Polarized and Channel IN Current-Polarized Directional Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 178 Refer to the setting ideas for SEL setting E32IV, near the back of this section, especially if OGIC setting ORDER = U (ungrounded or high-impedance grounded system). 4-20 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 179 Figure 4.9: Negative-Sequence Voltage-Polarized Directional Element Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 180 Figure 4.10 may be either a calculated value (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources earlier in this section. 4-22 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 181 Figure 4.11: Channel IN Current-Polarized Directional Element Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 182 Figure 4.12 may be either a calculated value (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources earlier in this section. 4-24 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 183 VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources and Directional Control Settings in this section. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 184 Figure 4.14 may be either a calculated value (when global settings VSCONN = VS and PTCONN = WYE) or a measured value (when global setting VSCONN = 3V0). See Zero-Sequence Voltage Sources earlier in this section. 4-26 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 185 Figure 4.15: Routing of Directional Elements to Residual Ground Overcurrent Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 186 Figure 4.16: Routing of Direction Elements to Neutral Ground Overcurrent Elements 4-28 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 187 Figure 4.17: Direction Forward/Reverse Logic for Residual Ground Overcurrent Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-29 SEL-351-5, -6, -7 Instruction Manual...

  • Page 188: Directional Control For Negative-Sequence And Phase Overcurrent Elements

    If three-phase voltage signals are not available, make the group setting VNOM = OFF. This prevents the negative-sequence voltage-polarized and positive-sequence voltage-polarized elements from operating on false voltage quantities, yet still allows the Best-Choice Ground 4-30 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 189: Internal Enables

    Note in Figure 4.19 and Figure 4.21, that the assertion of internal enable 32QE (for the negative- sequence voltage-polarized directional element) disables the positive-sequence voltage-polarized directional element. The negative-sequence voltage-polarized directional element has priority Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-31 SEL-351-5, -6, -7 Instruction Manual...

  • Page 190: Directional Element Routing

    Level 1 overcurrent elements set direction forward (DIR1 = F) Level 2 overcurrent elements set direction forward (DIR2 = F) Level 3 overcurrent elements set direction reverse (DIR3 = R) 4-32 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 191 Provided by Torque Control Settings at the end of this section describes how to avoid this limitation for special cases. Figure 4.20: Negative-Sequence Voltage-Polarized Directional Element for Negative- Sequence and Phase Overcurrent Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 192 Figure 4.21: Positive-Sequence Voltage-Polarized Directional Element for Phase Overcurrent Elements 4-34 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 193 Figure 4.22: Routing of Directional Elements to Negative-Sequence and Phase Overcurrent Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 194 Figure 4.23: Direction Forward/Reverse Logic for Negative-Sequence Overcurrent Elements 4-36 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 195 Figure 4.24: Direction Forward/Reverse Logic for Phase Overcurrent Elements Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-37 SEL-351-5, -6, -7 Instruction Manual...

  • Page 196: Directional Control Settings

    DIR1, DIR2, DIR3, DIR4, ORDER, 50P32P, 50NFP, 50NRP, a0N, 59RES, 32WFP, 32WRP, 32WD, and E32IV (E32IV is a SEL setting) OGIC All these settings are explained in detail in the remainder of this subsection. 4-38 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 197: Settings

    Table 4.4 that all the time-overcurrent elements (51_T elements) are controlled by the DIR1 level direction setting. Figure 4.17, Figure 4.18, Figure 4.23, and Figure 4.24 show the logic implementation of the control listed in Table 4.4. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-39 SEL-351-5, -6, -7 Instruction Manual...

  • Page 198: Order-Ground Directional Element Priority Setting

    If the negative-sequence voltage-polarized directional element is not operable (i.e., it does not have sufficient operating quantity as indicated by its internal enable, 32QGE, not being asserted; 4-40 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 199: Petersen Coil Considerations For Setting Order

    Petersen Coil), much higher currents can flow for a ground fault when the bypass is closed. In such a scenario, setting ORDER should be set something like ORDER = QP or ORDER = QVP Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-41 SEL-351-5, -6, -7 Instruction Manual...

  • Page 200: 50P32P-Phase Directional Element Three-Phase Current Pickup

    Z1MAG as follows: Z2F = Z1MAG/2 (Ω secondary) Z2R = Z1MAG/2 + z (Ω secondary; “z” listed in table below) 4-42 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 201: 50Qfp-Forward Directional Negative-Sequence Current Pickup

    50QFP = 0.10 A secondary (1 A nominal phase current inputs, IA, IB, IC) 50QRP = 0.05 A secondary (1 A nominal phase current inputs, IA, IB, IC) Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-43 SEL-351-5, -6, -7 Instruction Manual...

  • Page 202: A2-Positive-Sequence Current Restraint Factor, I

    ), referred to in the above application of the k2 factor, is from the residual current (I ), which is derived from phase currents I , and I 4-44 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 203 See preceding subsection Petersen Coil Considerations for Setting ORDER for more information on setting 50GFP and 50GRP for a Petersen Coil grounded system. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-45 SEL-351-5, -6, -7 Instruction Manual...
  • Page 204 IA, IB, IC) -320.00 to 320.00 Ω secondary (150 V voltage inputs, VA, VB, VC; 1 A nominal phase current inputs, IA, IB, IC) 4-46 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 205 Settings Z0F and Z0R are adjusted internally (with CT ratio settings) to operate on this I current base, when needed (effectively, Z0F•CTRN/CTR and Z0R•CTRN/CTR). See preceding subsection Internal Enables. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-47 SEL-351-5, -6, -7 Instruction Manual...
  • Page 206 Z0R>Z0F) usually suffices for mostly inductive systems—Figure 4.25 and Figure 4.26 just provide a theoretic background. Figure 4.25: Zero-Sequence Impedance Network and Relay Polarity 4-48 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 207 Settings 50NFP and 50NRP are adjusted internally to operate on this residual current I base, when needed (effectively, 50NFP•CTRN/CTR and 50NRP•CTRN/CTR). Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-49 SEL-351-5, -6, -7 Instruction Manual...
  • Page 208 It is part of the enabling logic for the wattmetric element part of the Petersen Coil directional element (see Figure 4.13). 4-50 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 209 Consider a permanent line-to-ground fault out on the feeder in Figure 2.19 (refer to the relay and feeder shown in Figure 2.19 as Relay 1 and Feeder 1, respectively. Other feeders on the same Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-51 SEL-351-5, -6, -7 Instruction Manual...
  • Page 210 (in watts secondary), with a margin of more sensitivity than the minimum detected ground faults (forward and reverse, respectively). Enter wattmetric settings as positive values. 4-52 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 211 V , and V voltages. The 59RES, 32WFP, and 32WRP settings are set in terms of this same base. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-53 SEL-351-5, -6, -7 Instruction Manual...
  • Page 212 This pre-scaling makes the 59RES setting match the scaling the relay does when it internally converts the VS channel value to the VA, VB, VC voltage base. 4-54 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 213: Loss-Of-Potential, Load Encroachment, And Directional Element Logic

    PTRS/PTR before using it in the Petersen Coil directional element and in the various zero- sequence voltage-polarized directional elements. Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-55 SEL-351-5, -6, -7 Instruction Manual...
  • Page 214 Relay Word bit (see Figure 4.6) asserts during a phase-to-phase fault. If either one of these occur, the E32IV setting evaluates to logical 0, and the ungrounded/high-impedance grounded directional element is blocked (see Figure 4.8). 4-56 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 215 (direction reverse; see Figure 3.16) 51CTC = 32PR (direction reverse; see Figure 3.17) 51NTC = 1 (nondirectional; see Figure 3.18) 51GTC = 32GF (direction forward; see Figure 3.19) Date Code 20020426 Loss-of-Potential, Load Encroachment, and Directional Element Logic 4-57 SEL-351-5, -6, -7 Instruction Manual...
  • Page 216 Level 1 overcurrent elements (controlled by level direction setting DIR1). The same setting principles apply to the other levels as well. Many variations are possible. 4-58 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 217 KEY—Key Permissive Trip..................5-16 EKEY—Echo Key Permissive Trip ................5-17 Variations for Permissive Underreaching Transfer Trip (PUTT) Scheme......5-19 Installation Variations ......................5-19 Directional Comparison Unblocking (DCUB) Logic..............5-20 Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 218 Target Reset/Lamp Test Front-Panel Pushbutton............... 5-34 Other Applications for the Target Reset Function............5-34 ® Control Equation Setting FAULT..............5-35 OGIC TABLES Table 5.1: SEL-351 Relay Front-Panel Target LED Definitions ............5-31 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 219 Line DCB Scheme ....................... 5-30 Figure 5.16: SEL-351 Relay Connections to Communications Equipment for a Three-Terminal Line DCB Scheme ....................... 5-30 Figure 5.17: Seal-in of Breaker Failure Occurrence for Message Display..........5-35 Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 221: Trip And Target Logic

    This timer establishes the minimum time duration for which the TRIP Relay Word bit asserts. This is rising edge initiated timer. The settable range for this timer is 4–16,000 cycles. See Figure 5.2. Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 222 Level 1 overcurrent elements and other time delayed elements (e.g., Level 2 definite-time overcurrent elements), and TRSOTF is set with nondirectional overcurrent elements. Figure 5.1: Trip Logic Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 223: Set Trip

    In previous firmware versions of the SEL-351 Relay, the OPEN command was embedded in the trip logic in Figure 5.1. The OPEN command was routed directly into the Minimum Trip Duration Timer, along with the output of logic gate OR-1. Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 224: Unlatch Trip

    The front-panel TARGET RESET button or the TAR R (Target Reset) serial port command are primarily used during testing. Use these to force the TRIP Relay Word bit to logical 0 if test Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 225: Other Applications For The Target Reset Function

    • Relay Word bit OC asserts for execution of the OPEN Command. See OPE Command (Open Breaker) in Section 10: Serial Port Communications and Commands for more information on the OPEN Command. Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 226: Unlatch Trip

    In the factory settings, the resultant of the trip logic in Figure 5.1 is routed to output contact OUT101 with the following SEL control equation setting: OGIC OUT101 = TRIP Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 227 TRSOTF (e.g., TRSOTF = 50P2) to trip after the circuit breaker closes. Figure 5.3 and the following discussion describe the three-pole open (3PO) logic and the SOTF logic. Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 228: Three-Pole Open Logic

    The 3POD dropout time qualifies circuit breaker closure, whether detected by circuit breaker status (52A) or load current level (50L). When the circuit breaker is closed: 3PO = logical 0 (circuit breaker closed) Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 229: Determining Three-Pole Open Condition Without Circuit Breaker Auxiliary Contact

    IN105 is energized. SEL OGIC control equation setting CLMON (close bus monitor) monitors the optoisolated input IN105: CLMON = IN105 Date Code 20020426 Trip and Target Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 230: Switch-Onto-Fault Logic Output (Sotfe)

    The directional elements have no voltage for reference and cannot operate. In this case, the instantaneous overcurrent element in the SOTF trip logic should be nondirectional. 5-10 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 231: Enable Setting Ecomm

    ECOMM = N [no communications-assisted trip scheme enabled] ECOMM = POTT [POTT or PUTT scheme] ECOMM = DCUB1 [DCUB scheme for two-terminal line (communications from one remote terminal)] Date Code 20020426 Trip and Target Logic 5-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 232: Trip Setting Trcomm

    TRSOTF OGIC and TR can also be used, in addition to setting TRCOMM. Setting TRSOTF can be set as described in preceding subsection Switch-Onto-Fault (SOTF) Trip Logic. 5-12 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 233: Trip Setting Dtt

    Relay Word bit IN102 can also be used in other SEL control equations in the OGIC SEL-351 Relay. See Optoisolated Inputs in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on optoisolated inputs. Date Code 20020426 Trip and Target Logic 5-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 234 TRCOMM asserts and OGIC the current reversal logic is not asserted. • Prevents keying and tripping by the POTT logic following a current reversal. 5-14 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 235: Use Existing Sel-321 Relay Pott Application Guide For The Sel-351 Relay

    ECOMM = POTT. Relay Word bit PT is then an input into the POTT logic in Figure 5.6 (for echo keying). Figure 5.5: Permissive Input Logic Routing to POTT Logic Date Code 20020426 Trip and Target Logic 5-15 SEL-351-5, -6, -7 Instruction Manual...

  • Page 236: Timer Settings

    OGIC equation setting OUT105 is set: OUT105 = KEY Output contact OUT105 drives a communications equipment transmitter input in a two-terminal line application (see Figure 5.8). 5-16 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 237 In a three-terminal line scheme, output contact OUT107 is set the same as OUT105 (see Figure 5.9): OUT107 = KEY EKEY — — — — Echo Key Permissive Trip Permissive trip signal keyed by Echo logic (used in testing). Date Code 20020426 Trip and Target Logic 5-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 238 Figure 5.6: POTT Logic 5-18 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 239: Variations For Permissive Underreaching Transfer Trip (Putt) Scheme

    Depending on the installation, perhaps one output contact (e.g., OUT105 = KEY) could be connected in parallel to both transmitter inputs (TX) on the communication equipment in Figure 5.9. Then output contact OUT107 can be used for another function. Date Code 20020426 Trip and Target Logic 5-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 240 DCUB1 and DCUB2 is: DCUB1 directional comparison unblocking scheme for two-terminal line (communications from one remote terminal) DCUB2 directional comparison unblocking scheme for three-terminal line (communications from two remote terminals) 5-20 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 241: Use Existing Sel-321 Relay Dcub Application Guide For The Sel-351 Relay

    PT2 in Figure 5.5 are routed in various combinations to control Relay Word bit PT, depending on enable setting ECOMM = DCUB1 or DCUB2. Relay Word bit PT is then an input into the POTT logic in Figure 5.6 (for echo keying). Date Code 20020426 Trip and Target Logic 5-21 SEL-351-5, -6, -7 Instruction Manual...

  • Page 242: Timer Settings

    UBB1, UBB2 — — — — Unblocking Block Output(s) In two-terminal line DCUB applications (setting ECOMM = DCUB1), UBB1 disables tripping if the loss-of-channel condition continues for longer than time UBDURD. 5-22 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 243 UBB, depending on enable setting ECOMM = DCUB1 or DCUB2. Relay Word bit UBB is the unblock block input into the trip logic in Figure 5.1. When UBB asserts to logical 1, tripping is blocked. Date Code 20020426 Trip and Target Logic 5-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 244 Figure 5.10: DCUB Logic 5-24 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 245: Installation Variations

    Figure 5.13. Then output contact OUT107 can be used for another function. Figure 5.12: SEL-351 Relay Connections to Communications Equipment for a Two-Terminal Line DCUB Scheme (Setting ECOMM = DCUB1) Date Code 20020426 Trip and Target Logic 5-25 SEL-351-5, -6, -7 Instruction Manual...

  • Page 246: Use Existing Sel-321 Relay Dcb Application Guide For The Sel-351 Relay

    Use the existing SEL-321 Relay DCB application guide (AG93-06) to help set up the SEL-351 Relay in a DCB scheme (see preceding subsection Communications-Assisted Trip Logic— General Overview for more setting comparison information on the SEL-321/SEL-351 Relays). 5-26 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 247: External Inputs

    The following logic outputs can be tested by assigning them to output contacts. See Output Contacts in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on output contacts. Date Code 20020426 Trip and Target Logic 5-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 248 The received block trip input (e.g., BT = IN104) is routed through a dropout timer (BTXD) in the DCB logic in Figure 5.14. The timer output (BTX) is routed to the trip logic in Figure 5.1. 5-28 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 249: Installation Variations

    Figure 5.16 also shows communication equipment RX (receive) output contacts from each remote terminal connected to separate inputs IN104 and IN106 on the SEL-351 Relay. The inputs Date Code 20020426 Trip and Target Logic 5-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 250 Figure 5.15: SEL-351 Relay Connections to Communications Equipment for a Two-Terminal Line DCB Scheme Figure 5.16: SEL-351 Relay Connections to Communications Equipment for a Three-Terminal Line DCB Scheme 5-30 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 251 Further target LED information follows. Refer also to Figure 2.2 through Figure 2.4 in Section 2: Installation for the placement of the target LEDs on the front panel. Date Code 20020426 Trip and Target Logic 5-31 SEL-351-5, -6, -7 Instruction Manual...

  • Page 252: Additional Target Led Information

    Additionally, if SCADA asserts optoisolated input IN104 to trip and it should illuminate the COMM target LED, set it in SEL control equation setting DTT also: OGIC DTT = … + IN104 + … 5-32 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 253: Sotf Target Led

    (see Table 4.1), then A, B, and C target logic for ground faults uses Relay Word bits NSA, NSB, and NSC in determining the involved phase for forward faults only. Date Code 20020426 Trip and Target Logic 5-33 SEL-351-5, -6, -7 Instruction Manual...

  • Page 254: G Target Led

    (see Rotating Default Display in Sections 7 and 11, also): SV8 = (SV8 + SV7T)*!TRGTR DP3 = SV8 DP3_1 = BREAKER FAILURE DP3_0 = (blank) 5-34 Trip and Target Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 255: Sel Ogic Control Equation Setting Fault

    • Voltage Sag, Swell Interruption elements – FAULT is used to suspend the calculation of Vbase. See subsection Voltage Sag, Swell, and Interruption Elements in Section 3: Overcurrent, Voltage Synchronism Check, Frequency, and Power Elements. Date Code 20020426 Trip and Target Logic 5-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 257 Drive-to-Lockout and Drive-to-Last Shot Settings (79DTL and 79DLS, Respectively) ......................6-22 Factory Settings Example................... 6-22 Additional Settings Example 1 ................... 6-23 Additional Settings Example 2 ................... 6-23 Other Settings Considerations ..................6-23 Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 258 Figure 6.9: Operation of SEL-351 Relay Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 1) ..............6-29 Figure 6.10: Operation of SEL-351 Relay Shot Counter for Sequence Coordination With Line Recloser (Additional Settings Example 2) ..............6-31 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 259: Close And Reclose Logic

    (unlatch close conditions, other than circuit breaker status, close failure, or reclose initiation) and setting: (Close Failure Time) See the settings sheet in Section 9: Setting the Relay for setting ranges. Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 260: Set Close

    CLOSE command if desired via setting CL. The CLOSE command is included in the close logic in the factory settings: Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 261: Unlatch Close

    The factory setting for the Close Failure Timer setting is: = 60.00 cycles See the settings sheets at the end of Section 9: Setting the Relay for setting ranges. Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 262: Set Close

    Rotating Default Display in Section 7: Inputs, Outputs, Timers, and Other Control Logic. In the factory settings, circuit breaker status indication is controlled by display point setting DP2: Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 263: Program An Output Contact For Closing

    CLOSE Relay Word bit to logical 1. This input into the close logic in Figure 6.1 is an output of the reclose supervision logic in the following Figure 6.2. Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 264 Figure 6.2: Reclose Supervision Logic (Following Open Interval Time-Out) Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 265 Figure 6.3: Reclose Supervision Limit Timer Operation (Refer to Bottom of Figure 6.2) Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 266: Settings And General Operation

    If 79CLS asserts to logical 1 at any time during this 79CLSD time window, then the now- qualified open interval time-out will propagate onto the final close logic in Figure 6.1 to automatically reclose the circuit breaker. Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 267: Set Reclose Supervision Logic (Bottom Of Figure 6.2)

    79CLSD = OFF, reclose supervision condition 79CLS is not time limited. When an open interval times out, reclose supervision condition 79CLS is checked indefinitely until one of the other above unlatch conditions comes true. Date Code 20020426 Close and Reclose Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 268: Factory Settings Example

    52/1 first, followed by the SEL-351(2) Relay reclosing circuit breaker 52/2, after a synchronism check across circuit breaker 52/2. Figure 6.4: SEL-351 Relays Installed at Both Ends of a Transmission Line in a High-Speed Reclose Scheme 6-10 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 269: Sel-351(1) Relay

    If channel VS of the SEL-351(2) Relay is connected to one of these briefly energized phases, synchronism check element 25A1 could momentarily assert to logical 1. Date Code 20020426 Close and Reclose Logic 6-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 270: Additional Settings Example 2

    The reclose enable setting, E79, has setting choices N, 1, 2, 3, and 4. Setting E79 = N defeats the reclosing relay. Setting choices 1 through 4 are the number of desired automatic reclosures (see Open Interval Timers that follows in this subsection). 6-12 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 271: Reclosing Relay States And General Operation

    Relay Word bit asserts to logical 1, and the LED illuminates. Automatic reclosing only takes place when the relay is in the Reclose Cycle State. Date Code 20020426 Close and Reclose Logic 6-13 SEL-351-5, -6, -7 Instruction Manual...

  • Page 272: Lockout State

    (presuming that an OPEN command trip should not initiate reclosing): 79RI = TRIP (reclose initiate) 79DTL = … + OC (drive-to-lockout) This is how the SEL-351 Relay is set at the factory. 6-14 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 273: Reclosing Relay States And Settings/Setting Group Changes

    52A is set to something other than numeral 0. Making the setting 52A = 0 defeats the close logic and also defeats the reclosing relay. Date Code 20020426 Close and Reclose Logic 6-15 SEL-351-5, -6, -7 Instruction Manual...

  • Page 274: Reclosing Relay Timer Settings

    If open interval 1 time setting, 79OI1, is set to zero (79OI1 = 0.00 cycles), no open interval timing takes place, and the reclosing relay is defeated. 6-16 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 275: Determination Of Number Of Reclosures (Last Shot)

    52A. (See Close Logic earlier in this section for more discussion on control equation setting 52A. Also see Optoisolated Inputs in Section 7: Inputs, OGIC Date Code 20020426 Close and Reclose Logic 6-17 SEL-351-5, -6, -7 Instruction Manual...

  • Page 276: Monitoring Open Interval And Reset Timing

    If the reset timer is actively timing, RSTMN asserts to logical 1. If the reset timer is not timing, RSTMN deasserts to logical 0. See Block Reset Timing Setting (79BRS) later in this subsection. 6-18 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 277: Reclosing Relay Shot Counter

    OC + !IN102 + LB3 Drive-to-Lockout 79DLS 79LO Drive-to-Last Shot 79SKP Skip Shot 79STL TRIP Stall Open Interval Timing 79BRS Block Reset Timing 79SEQ Sequence Coordination 79CLS Reclose Supervision Date Code 20020426 Close and Reclose Logic 6-19 SEL-351-5, -6, -7 Instruction Manual...

  • Page 278: Reclose Initiate And Reclose Initiate Supervision Settings

    Setting 79RI looks for a logical 0 to logical 1 transition, thus Relay Word bit 52A is inverted in the 79RI setting [!52A = NOT(52A)]. 6-20 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 279: Other Settings Considerations

    (numeral 0) reclosing will never take place (the reclosing relay goes directly to the lockout state any time reclosing is initiated). The reclosing relay is effectively inoperative. Date Code 20020426 Close and Reclose Logic 6-21 SEL-351-5, -6, -7 Instruction Manual...

  • Page 280: Drive-To-Lockout And Drive-To-Last Shot Settings

    = !IN102 + LB3 + OC = NOT(IN102) + (logical 1) + OC = logical 1 Relay Word bit OC asserts for execution of the OPEN Command. See the Note in the Lockout State discussion, following Table 6.1. 6-22 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 281: Additional Settings Example 1

    Overall, settings 79DTL or 79DLS are needed to take the relay to the Lockout State (or to last shot) for immediate circumstances. Date Code 20020426 Close and Reclose Logic 6-23 SEL-351-5, -6, -7 Instruction Manual...

  • Page 282: Skip Shot And Stall Open Interval Timing Settings

    = 0 to shot = 1. Then, open interval 1 time (setting 79OI1) is skipped, and the relay times on the open interval 2 time (setting 79OI2) instead. 6-24 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 283: Additional Settings Example 2

    (unless some other set condition stalls open interval timing). Additional Settings Example 3 Refer to Figure 6.4 and accompanying setting example, showing an application for setting 79STL. Date Code 20020426 Close and Reclose Logic 6-25 SEL-351-5, -6, -7 Instruction Manual...

  • Page 284: Other Settings Considerations

    Lockout State (79CY = logical 0). The relay will time immediately on reset time 79RSLD and take the relay from the Lockout State to the Reset State with no additional delay because 79BRS is deasserted to logical 0. 6-26 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 285: Additional Settings Example 1

    Reset State and there is a sequence coordination operation, it remains in the Reset State. Factory Settings Example Sequence coordination is not enabled in the factory settings: 79SEQ Date Code 20020426 Close and Reclose Logic 6-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 286 51PT is coordinated with the line recloser fast curve. The SEL-351 Relay single-phase time- overcurrent elements 51AT, 51BT, and 51CT are coordinated with the line recloser slow curve. 6-28 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 287 = 3, etc. The 51PT phase time-overcurrent element cannot cause a trip because shot ≥ 2, and SH0 and SH1 both are deasserted to logical 0. Date Code 20020426 Close and Reclose Logic 6-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 288 Relay also sees the fault. The phase time-overcurrent pickup 51P asserts and then deasserts without tripping, incrementing the relay shot counter from: shot = 0 to shot = 1 6-30 Close and Reclose Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 289 79RSD is set long enough to maintain the shot counter at shot = 1 as shown in Figure 6.10. Reclose Supervision Setting (79CLS) See Reclose Supervision Logic earlier in this section. Date Code 20020426 Close and Reclose Logic 6-31 SEL-351-5, -6, -7 Instruction Manual...
  • Page 291 Active Setting Group Switching Example 1................7-22 Start Out in Setting Group 1 ..................7-24 Switch to Setting Group 4 ...................7-24 Switch Back to Setting Group 1 ..................7-24 Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 292: Timers

    Extra Details for Displaying Metering Values on the Rotating Default Display ..7-43 Extra Details for Displaying Breaker Wear Monitor Quantities on the Rotating Default Display....................7-46 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 293 Figure 7.16: Time Line for Reset of Latch Bit LT2 After Active Setting Group Change.......7-18 Figure 7.17: Latch Control Switch (With Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing.....................7-19 Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 294 Figure 7.28: Logic Flow for Example Output Contact Operation—Extra I/O Board (Model 0351x1 and 0351xY) ....................7-35 Figure 7.29: Traditional Panel Light Installations...................7-36 Figure 7.30: Rotating Default Display Replaces Traditional Panel Light Installations ......7-37 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 295: Section 7: Inputs, Outputs, Timers, And Other

    Figure 1.2 through Figure 1.4 and Figure 2.2 through Figure 2.4). Figure 7.1 is used for following discussion/examples. The optoisolated inputs in Figure 7.2 operate similarly. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 296 Figure 7.1: Example Operation of Optoisolated Inputs IN101 Through IN106 (Models 0351x0, 0351x1, and 0351xY) Figure 7.2: Example Operation of Optoisolated Inputs IN201 Through IN208—Extra I/O Board (Models 0351x1 and 0351xY) Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 297: Input Debounce Timers

    Optoisolated inputs IN101 through IN106 receive their function by how their corresponding Relay Word bits IN101 through IN106 are used in SEL control equations. OGIC Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 298: Factory Settings Examples

    Displays at the end of this section)]. Using Relay Word bit IN101 for the circuit breaker status setting 52A does not prevent using Relay Word bit IN101 in other SEL control equation OGIC settings. Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 299: Input In102

    See Section 6: Close and Reclose Logic for more information on SEL control equation OGIC setting 79DTL. The pickup/dropout timer for input IN102 (IN102D) is set at: IN102D = 1.00 cycle to provide input energization/deenergization debounce. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...
  • Page 300 LB16. Use these local bits in SEL control equations. For a given local control OGIC switch, the local control switch positions are enabled by making corresponding label settings. Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 301: Local Control Switch Types

    The local bit LBn is maintained in the OFF (LBn = logical 0) position and pulses to the MOMENTARY (LBn = logical 1) position for one processing interval (1/4 cycle). Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 302: On/Off/Momentary Switch

    Disable local control switches by “nulling out” all the label settings for that switch (see Section 9: Setting the Relay). The local bit associated with this disabled local control switch is then fixed at logical 0. Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 303: Factory Settings Examples

    To keep reclosing from being initiated for this trip, set local bit LB3 to drive the reclosing relay to lockout for a manual trip (see Section 6: Close and Reclose Logic): 79DTL = ... + LB3 Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic SEL-351-5, -6, -7 Instruction Manual...

  • Page 304: Additional Local Control Switch Application Ideas

    This feature makes the local bit feature behave the same as a traditional installation with panel- mounted control switches. If power is lost to the panel, the front-panel control switch positions remain unchanged. 7-10 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 305: Settings Change Or Active Setting Group Change

    Any given remote control switch can be put in one of the following three positions: (logical 1) (logical 0) MOMENTARY (logical 1 for one processing interval) Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 306: Remote Bit Application Ideas

    See Appendix G: Setting SEL Control Equations for more details on using the rising and OGIC failling edge operators in SEL control equations. OGIC 7-12 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 307 These latch control switches each have the following SEL control equation settings: OGIC SETn (set latch bit LTn to logical 1) RSTn (reset latch bit LTn to logical 0) Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-13 SEL-351-5, -6, -7 Instruction Manual...

  • Page 308: Latch Control Switch Application Ideas

    [= (rising edge of input IN104) AND NOT(LT1)] RST1 = /IN104*LT1 [= (rising edge of input IN104) AND LT1] 79DTL = !LT1 [= NOT(LT1); drive-to-lockout setting] 7-14 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 309: Feedback Control

    LT1 changes state from logical 0 to logical 1). For example in Figure 7.14, if: LT1 = logical 0 input IN104 is routed to setting SET1 (as discussed previously): Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 310 OGIC produced by the input pickup/dropout debounce timer IN104D. Figure 7.15: Latch Control Switch Operation Time Line 7-16 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 311: Use A Remote Bit Instead To Enable/Disable The Reclosing Relay

    RSTn (n = 1 through 16). Relay Word bits SG1 through SG6 OGIC indicate the active setting Group 1 through 6, respectively (see Table 7.3). Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-17 SEL-351-5, -6, -7 Instruction Manual...

  • Page 312: Note: Make Latch Control Switch Settings With Care

    Figure 7.15), the SCADA contact cannot be asserting/deasserting continuously, thus causing latch bit LT1 to change state continuously. Note that the rising edge operators in the SET1 and RST1 7-18 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 313 Figure 7.17: Latch Control Switch (With Time Delay Feedback) Controlled by a Single Input to Enable/Disable Reclosing Figure 7.18: Latch Control Switch (With Time Delay Feedback) Operation Time Line Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-19 SEL-351-5, -6, -7 Instruction Manual...

  • Page 314: Multiple Setting Groups

    SS1 through SS6 have priority over the serial port GROUP OGIC command and the front-panel GROUP pushbutton in selecting the active setting group. 7-20 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 315: Operation Of Serial Port Group Command And Front-Panel Group Pushbutton

    See Section 10: Serial Port Communications and Commands for more information on the serial port GROUP command. See Section 11: Front-Panel Interface for more information on the front-panel GROUP pushbutton. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-21 SEL-351-5, -6, -7 Instruction Manual...

  • Page 316: Relay Disabled Momentarily During Active Setting Group Change

    Group 4 ... pulse to activate setting Group 1 ... This logic is implemented in the SEL control equation settings in Table 7.5. OGIC 7-22 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 317 Timer pickup setting SV8PU is set greater than the pulse width of the SCADA contact (Figure 7.19). This allows only one active setting group change (e.g., from setting Group 1 to 4) Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-23 SEL-351-5, -6, -7 Instruction Manual...

  • Page 318: Start Out In Setting Group 1

    Group 1 after qualifying time setting TGR (perhaps set at a cycle or so to qualify the assertion of setting SS1). Optoisolated input IN105 also has its own built-in debounce timer (IN105D) available (see Figure 7.1). 7-24 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 319 SEL-351 Relay. In this example, optoisolated inputs IN101, IN102, and IN103 on the relay are connected to a rotating selector switch in Figure 7.22. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 320 SS6 = IN103 * IN102 * !IN101 = IN103 * IN102 * NOT(IN101) The settings in Table 7.7 are made in each setting Group 1 through 6. 7-26 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 321: Selector Switch Now Rests On Position Remote

    With settings SS1 through SS6 all at logical 0, the serial port GROUP command or the front- panel GROUP pushbutton can be used to switch the active setting group from Group 5, in this example, to another desired setting group. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-27 SEL-351-5, -6, -7 Instruction Manual...

  • Page 322: Active Setting Group Retained

    If the individual settings change causes a change in one or more SEL control equation OGIC settings SS1 through SS6, the active setting group can be changed, subject to the newly enabled SS1 through SS6 settings. 7-28 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 323: Note: Make Active Setting Group Switching Settings With Care

    These timer setting ranges apply to both pickup and dropout times (SVnPU and SVnDO, n = 1 through 16). Figure 7.24: SEL Control Equation Variables/Timers SV1/SV1T Through SV6/SV6T OGIC Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-29 SEL-351-5, -6, -7 Instruction Manual...

  • Page 324: Factory Settings Example

    2-cycle dropout (SV1DO = 2 cycles). The output of the timer (Relay Word bit SV1T) operates output contact OUT103. OUT103 = SV1T 7-30 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 325: Additional Settings Example 1

    This is done by making the following SEL OGIC control equation settings: OUT103 = SV7T (breaker failure trip) OUT104 = SV7T (breaker failure trip) Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-31 SEL-351-5, -6, -7 Instruction Manual...

  • Page 326: Additional Settings Example 2

    Alarm logic/circuitry controls the ALARM output contact (see Figure 7.27) Figure 7.27 is used for following discussion/examples. The output contacts in Figure 7.28 operate similarly. 7-32 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 327: Factory Settings Example

    A “b” type output contact is closed when the output contact coil is deenergized and open when the output contact coil is energized. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 328 Contact Jumpers in Section 2: Installation for output contact type options. Figure 7.27: Logic Flow for Example Output Contact Operation (Models 0351x0, 0351x1, and 0351xY) 7-34 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 329 SCADA contacts, etc. They indicate such conditions as: circuit breaker open/closed reclosing relay enabled/disabled Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 330 The indicating panel lights are not needed if the rotating default display feature in the SEL-351 Relay is used. Figure 7.30 shows the elimination of the indicating panel lights by using the rotating default display. 7-36 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 331 The factory settings provide the replacement solution shown in Figure 7.30 for the traditional indicating panel lights in Figure 7.29. Reclosing Relay Status Indication Make SEL control equation display point setting DP1: OGIC DP1 = IN102 Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-37 SEL-351-5, -6, -7 Instruction Manual...
  • Page 332 DP2 = IN101 = logical 1 This results in the display of corresponding text setting DP2_1 on the front-panel display: BREAKER CLOSED 7-38 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 333 To continually display a message in the rotation, set the SEL control equation display point OGIC setting directly to 0 (logical 0) or 1 (logical 1) and the corresponding text setting. For example, if Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 334 Reclosing Relay Enabled In Figure 7.30, optoisolated input IN102 is energized to enable the reclosing relay, resulting in: DP1 = IN102 = logical 1 7-40 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 335 Table 7.8 through Table 7.11 list all the available values (other than the user-entered text values, discussed previously) that rotate on the default display, subject to the number of available display Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-41 SEL-351-5, -6, -7 Instruction Manual...
  • Page 336 Table 7.8: :IAPK ::IBPJ 7-42 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 337 . x x x A-phase megawatts MWB* x x . x x x B-phase megawatts MWC* x x . x x x C-phase megawatts Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-43 SEL-351-5, -6, -7 Instruction Manual...
  • Page 338 O D E M= x . x x x B-phase demand megawatts out MWBPO* = x . x x x B-phase peak demand megawatts out 7-44 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 339 For example: in a delta-connected relay (PTCONN=DELTA), if the following is entered: DP1_0 = ::VA DP2_0 = ::VAB DP1 = 0 DP2 = 0 Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-45 SEL-351-5, -6, -7 Instruction Manual...
  • Page 340 With the relay set as shown previously, the LCD will show the following: EXT TRIPS=XXXXX INT TRIPS=XXXXX then, INT IA=XXXXXX kA EXT IA=XXXXXX kA and then, WEAR A= XXX % 7-46 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 341 This example demonstrates use of the rotating display to show time-overcurrent elements in primary units. This example will set the 51PP and 51NP to display in the rotating default display. Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-47 SEL-351-5, -6, -7 Instruction Manual...
  • Page 342 TOC element 51QT 51NP x x x x x x x . x x p r i pickup for neutral ground TOC element 51NT 7-48 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 343 ;;51NP 51NP xxxxxxx.xx ;;;000 51AP xxxxxxx ;;;001 51BP xxxxxxx ;;;002 51CP xxxxxxx ;;;003 51PP xxxxxxx ;;;004 51GP xxxxxxx ;;;005 51QP xxxxxxx ;;;006 51NP xxxxxxx Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-49 SEL-351-5, -6, -7 Instruction Manual...
  • Page 344 To illustrate this, continuing from the above example: SET T DP1_0 = NEUTRP=;;51NP;A with IN101 deasserted, will display: NEUTRP 180.00 N SEQ= OFF 7-50 Inputs, Outputs, Timers, and Other Control Logic Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 345 SET T DP2_0 = 51ABCD=;;;001;AP When IN101=0, the following will display on the front-panel display (assuming 51AP= 720 A primary, and 51BP=600 A primary): 51THXYZ= 720A 51ABCD= 600AP Date Code 20020426 Inputs, Outputs, Timers, and Other Control Logic 7-51 SEL-351-5, -6, -7 Instruction Manual...
  • Page 347 Demand Current Logic Output Application—Raise Pickup for Unbalance Current ..8-27 Residual Ground Demand Current Below Pickup GDEMP........8-28 Residual Ground Demand Current Goes Above Pickup GDEMP ......8-28 Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...
  • Page 348 Applied to Series RC Circuit................8-22 Figure 8.13: Demand Current Logic Outputs ..................8-26 Figure 8.14: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current ..8-27 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 349: Breaker Monitor, Metering, And Load

    This breaker maintenance information lists the number of close/open operations that are permitted for a given current interruption level. The following is an example of breaker maintenance information for a 25 kV circuit breaker. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...
  • Page 350 Set Point 3 number of close/open operations that correspond to the maximum current interruption level. These three points are entered with the settings in Table 8.2. Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 351 Figure 8.1: Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...

  • Page 352: Breaker Monitor Setting Example

    A, B, and C don’t necessarily interrupt the same magnitude current (depending on fault type and loading). Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 353 Figure 8.2: SEL-351 Relay Breaker Maintenance Curve for a 25 kV Circuit Breaker Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...

  • Page 354: Operation Of Sel Ogic ® Control Equation Breaker Monitor Initiation Setting

    See Figure 8.8 and accompanying text for more information on setting BKMON. The operation of the breaker monitor maintenance curve, when new current values are read in, is explained in the following example. Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 355: Breaker Monitor Operation Example

    BRE R command. Additionally, logic outputs assert for alarm or other control applications—see the following discussion. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...
  • Page 356 Figure 8.4: Breaker Monitor Accumulates 10 Percent Wear Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 357 Figure 8.5: Breaker Monitor Accumulates 25 Percent Wear Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions SEL-351-5, -6, -7 Instruction Manual...
  • Page 358 Figure 8.6: Breaker Monitor Accumulates 50 Percent Wear 8-10 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 359 Figure 8.7: Breaker Monitor Accumulates 100 Percent Wear Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 360: Breaker Monitor Output

    0 percent and consequently causes Relay Word bit BCWA to deassert (BCWA = logical 0). 8-12 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 361: Via Front Panel

    Note that optoisolated input IN106 monitors the trip bus. If the trip bus is energized by output contact OUT101, an external control switch, or some other external trip, then IN106 is asserted. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-13 SEL-351-5, -6, -7 Instruction Manual...

  • Page 362: Station Dc Battery Monitor

    (DCLOP and DCHIP) are available via the SET G command (see Table 9.1 in Section 9: Setting the Relay and also Settings Sheet 22 of 29 in the back of Section 9). 8-14 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 363: Create Desired Logic For Dc Under- And Overvoltage Alarming

    In these two examples, the resultant dc voltage elements are time-qualified by timer SV4T and then routed to output contact OUT106 for alarm purposes. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-15 SEL-351-5, -6, -7 Instruction Manual...

  • Page 364: Dclo < Dchi (Top Of Figure 8.10)

    (all output contacts deassert on total loss of power). Thus, the resultant dc voltage element at the bottom of Figure 8.10 would probably be a better choice—see following discussion. 8-16 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 365: Dclo > Dchi (Bottom Of Figure 8.10)

    For example, if the station dc batteries have a problem and the station dc battery voltage is declining, drive the reclosing relay to lockout: 79DTL = !SV4T + ... [= NOT(SV4T) + ...] Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-17 SEL-351-5, -6, -7 Instruction Manual...

  • Page 366: View Station Dc Battery Voltage

    ER = /IN106 + ... Anytime the trip bus is energized, any dip in station dc battery voltage can be observed in column Vdc in the event report. 8-18 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 367: Station Dc Battery Voltage Dips During Circuit Breaker Closing

    If a “raw” event report is displayed (with the EVE R command), column Vdc will display the sampled ac voltage waveform, rather than the average. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-19 SEL-351-5, -6, -7 Instruction Manual...

  • Page 368: Demand Metering

    The current input is at a magnitude of zero and then suddenly goes to an instantaneous level of 1.0 per unit (a “step”). 8-20 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 369 Figure 8.11: Response of Thermal and Rolling Demand Meters to a Step Input (setting DMTC = 15 minutes) Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-21 SEL-351-5, -6, -7 Instruction Manual...

  • Page 370: Thermal Demand Meter Response (Edem = Thm)

    The rolling demand meter integrates the applied signal (e.g., step current) input in 5-minute intervals. The integration is performed approximately every 2 seconds. The average value for an 8-22 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 371: Time = 0 Minutes

    1.0 per unit 0 to 5 minutes 1.0 per unit Rolling demand meter response at “Time = 5 minutes” = 1.0/3 = 0.33 per unit Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-23 SEL-351-5, -6, -7 Instruction Manual...

  • Page 372: Time = 10 Minutes

    0.10–3.20 A {1 A nominal} 0.005–0.160 A {0.05 A nominal channel IN current input} GDEMP Residual ground demand current pickup QDEMP Negative-sequence demand current pickup 8-24 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 373 (PDEM, NDEM, GDEM, and QDEM) to alarm for high loading or unbalance conditions. Use in other schemes such as the following example. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 374 Figure 8.13: Demand Current Logic Outputs 8-26 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 375: Demand Current Logic Output Application-Raise Pickup For Unbalance Current

    !GDEM + GDEM*50G5 Refer to Figure 8.13, Figure 8.14, and Figure 3.19. Figure 8.14: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-27 SEL-351-5, -6, -7 Instruction Manual...

  • Page 376: Residual Ground Demand Current Below Pickup Gdemp

    NOT(logical 0) + (logical 0)*50G5 = logical 1 Thus, the residual ground time-overcurrent element 51GT operates on its standard pickup again: 51GP 1.50 A secondary 8-28 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 377: View Or Reset Demand Metering Information

    Demand metering peak recording is momentarily suspended when SEL control equation OGIC setting FAULT is asserted (= logical 1). See the explanation for the FAULT setting in the following Maximum/Minimum Metering subsection. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-29 SEL-351-5, -6, -7 Instruction Manual...

  • Page 378: Energy Metering

    MET RM reset command. These functions simulate analog meter drag-hands, with the maximum value representing the upper drag-hand and the minimum value representing the lower drag-hand. 8-30 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 379: Via Front Panel

    , the A,B,C,S AB,BC,CA,S voltage is above the corresponding threshold: 12.5 V secondary (150 V voltage inputs) 25.0 V secondary (300 V voltage inputs) Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-31 SEL-351-5, -6, -7 Instruction Manual...

  • Page 380: Load Profile Report (Available In Firmware Versions 6 And 7)

    Battery voltage FREQ Phase frequency MWA, MWB, MWC Phase megawatts (wye-connected only) Three-phase megawatts MVARA, MVARB, MVARC Phase megaVARs (wye-connected only) MVAR3 Three-phase megaVARs 8-32 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 381 If the command is entered with two date parameters [a] [b] (i.e., LDP 7/7/96 8/8/96), the relay displays all load records occurring from date [a] through date [b] inclusive. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 382 (top) of the report and the oldest row (date 1/5/97) at the end (bottom) of the report. Reverse chronological progression through the report is down the page and in ascending row number. 8-34 Breaker Monitor, Metering, and Load Profile Functions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 383: Determining The Size Of The Load Profile Buffer

    Clear the load profile buffer Are you sure (Y/N) ? Y <ENTER> Clearing Complete Changing the LDLIST setting will also result in the buffer being cleared. Date Code 20020426 Breaker Monitor, Metering, and Load Profile Functions 8-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 385 Set Command Editing Keystrokes ..................9-2 Table 9.3: SEL-351-5, -6, -7 Relay Word Bits ..................9-7 Table 9.4: Relay Word Bit Definitions for SEL-351-5, -6, -7 .............. 9-9 Table 9.5: Main Relay Functions That Change With VSCONN, When PTCONN = WYE....9-35 Table 9.6: Main Relay Functions That Change With VSCONN, When PTCONN = DELTA...
  • Page 387 PTCONN and VSCONN settings, so are not affected by the order of setting entry. ® Using the SEL-5030 software to make settings changes handles these details ERATOR automatically. Date Code 20020426 Setting the Relay SEL-351-5, -6, -7 Instruction Manual...
  • Page 388 SER, or Text settings (see Table 9.1), the relay is disabled while it saves the new settings. If changes are made to the Relay or Logic settings for the active setting group (see Table 9.1), the Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 389 I.E.C. Long-Time Inverse Curve: C4 tp = TD*(80.0/(M -1)) tp = TD*(120.0/(M-1)) tr = TD*(80.0/(1-M tr = TD*(120.0/(1-M)) I.E.C. Short-Time Inverse Curve: C5 0.04 tp = TD*(0.05/(M -1)) tr = TD*(4.85/(1-M Date Code 20020426 Setting the Relay SEL-351-5, -6, -7 Instruction Manual...
  • Page 390 Figure 9.1: U.S. Moderately Inverse Curve: U1 U.S. Inverse Curve: U2 U.S. Very Inverse Curve: U3 U.S. Extremely Inverse Curve: U4 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 391 Figure 9.5: U.S. Short-Time Inverse Curve: U5 Figure 9.7: I.E.C. Class B Curve (Very Figure 9.6: I.E.C. Class A Curve (Standard Inverse): C1 Inverse): C2 Date Code 20020426 Setting the Relay SEL-351-5, -6, -7 Instruction Manual...
  • Page 392 Figure 9.9: I.E.C. Long-Time Inverse Curve: Figure 9.8: I.E.C. Class C Curve (Extremely Inverse): C3 Figure 9.10: I.E.C. Short-Time Inverse Curve: Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 393 The Relay Word bit row numbers correspond to the row numbers used in the TAR command [see TAR Command (Target) in Section 10: Serial Port Communications and Commands]. Rows 0 and 1 are reserved for the display of the two front-panel target LED rows. Table 9.3: SEL-351-5, -6, -7 Relay Word Bits Relay Word Bits 50A1...
  • Page 394 DELTA Relay Word bit in Row 58, which is always available. 6 Indicated Relay Word bits are only valid in Relays with 0.2 A nominal neutral channel (rows 61–62). Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 395 Table 9.4: Relay Word Bit Definitions for SEL-351-5, -6, -7 Primary Definition Application 50A1 Level 1 A-phase instantaneous overcurrent element Tripping, (A-phase current above pickup setting 50P1P; see Control Figure 3.1) 50B1 Level 1 B-phase instantaneous overcurrent element (B-phase current above pickup setting 50P1P; see Figure 3.1)
  • Page 396 50A1 + 50A2 + 50A3 + 50A4 (see Figure 3.4) 50B1 + 50B2 + 50B3 + 50B4 (see Figure 3.4) 50C1 + 50C2 + 50C3 + 50C4 (see Figure 3.4) 9-10 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 397 Residual ground current above pickup setting 51GP Testing, Control for ground time-overcurrent element 51GT (see Figure 3.19) 51GT Residual ground time-overcurrent element 51GT Tripping timed out (see Figure 3.19) Date Code 20020426 Setting the Relay 9-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 398 (derived from 50P3; see Figure 3.3) 67P4 Level 4 phase instantaneous overcurrent element (derived from 50P4; see Figure 3.3) 67N1 Level 1 neutral ground instantaneous overcurrent element (derived from 50N1; see Figure 3.8) 9-12 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 399 (residual ground current above pickup setting 50G3P; see Figure 3.10) 50G4 Level 4 residual ground instantaneous overcurrent element (residual ground current above pickup setting 50G4P; see Figure 3.10) Date Code 20020426 Setting the Relay 9-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 400 Level 2 residual ground definite-time overcurrent element 67G2T timed out (derived from 67G2; see Figure 3.10) 67G3T Level 3 residual ground definite-time overcurrent element 67G3T timed out (derived from 67G3; see Figure 3.10) 9-14 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 401 Control overcurrent element (negative-sequence current above pickup setting 50Q5P; see Figure 3.13) 50Q6 Level 6 negative-sequence instantaneous overcurrent element (negative-sequence current above pickup setting 50Q6P; see Figure 3.13) Date Code 20020426 Setting the Relay 9-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 402 (see Figures 4.4 and 4.11) R32I Reverse channel IN current-polarized directional element (see Figures 4.4 and 4.11) 32PF Forward directional control routed to phase overcurrent elements (see Figures 4.19 and 4.22) 9-16 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 403 59A1 A-phase instantaneous overvoltage element (A-phase voltage above pickup setting 59P1P; see Figure 3.21) 59B1 B-phase instantaneous overvoltage element (B-phase voltage above pickup setting 59P1P; see Figure 3.21) Date Code 20020426 Setting the Relay 9-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 404 (negative-sequence voltage above pickup setting 59QP; see Figure 3.22 and Figure 3.24) 59V1 Positive-sequence instantaneous overvoltage element (positive-sequence voltage above pickup setting 59V1P; see Figure 3.22 and Figure 3.24) 9-18 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 405 81D5 Level 5 instantaneous frequency element (with corresponding pickup setting 81D5P; see Figure 3.31) 81D6 Level 6 instantaneous frequency element (with corresponding pickup setting 81D6P; see Figure 3.31) Date Code 20020426 Setting the Relay 9-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 406 Optoisolated input IN104 asserted (see Figure 7.1) inputs IN103 Optoisolated input IN103 asserted (see Figure 7.1) IN102 Optoisolated input IN102 asserted (see Figure 7.1) IN101 Optoisolated input IN101 asserted (see Figure 7.1) 9-20 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 407 Remote Bit 13 asserted (see Figure 7.10) RB14 Remote Bit 14 asserted (see Figure 7.10) RB15 Remote Bit 15 asserted (see Figure 7.10) RB16 Remote Bit 16 asserted (see Figure 7.10) Date Code 20020426 Setting the Relay 9-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 408 SV6 OGIC asserted (see Figure 7.24) control equation variable timer input SV7 OGIC asserted (see Figure 7.25) control equation variable timer input SV8 OGIC asserted (see Figure 7.25) 9-22 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 409 SV14T asserted (see Figure 7.25) SV15T control equation variable timer output OGIC SV15T asserted (see Figure 7.25) SV16T control equation variable timer output OGIC SV16T asserted (see Figure 7.25) Date Code 20020426 Setting the Relay 9-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 410 Indication 50P32 Three-phase overcurrent threshold exceeded (see Testing Figure 4.21) 59VA Channel VA voltage window element [channel VA voltage between threshold settings 25VLO and 25VHI; see Figure 3.26] 9-24 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 411 Breaker Monitor, Metering, and Load Profile Functions) BCWC C-phase breaker contact wear has reached 100% wear level (see Breaker Monitor in Section 8: Breaker Monitor, Metering, and Load Profile Functions) Date Code 20020426 Setting the Relay 9-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 412 (see Figure 5.14) DSTRT Directional carrier start (see Figure 5.14) NSTRT Nondirectional carrier start (see Figure 5.14) STOP Carrier stop (see Figure 5.14) Block trip input extension (see Figure 5.14) 9-26 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 413 Output contact OUT204 asserted (see Figure 7.28) OUT205 Output contact OUT205 asserted (see Figure 7.28) OUT206 Output contact OUT206 asserted (see Figure 7.28) OUT207 Output contact OUT207 asserted (see Figure 7.28) Date Code 20020426 Setting the Relay 9-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 414 Channel A, received bit 2 RMB1A Channel A, received bit 1 TMB8A Channel A, transmit bit 8 TMB7A Channel A, transmit bit 7 TMB6A Channel A, transmit bit 6 9-28 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 415 Channel B, received data ok LBOKA Channel A, looped back ok CBADA Channel A, channel unavailability over threshold RBADA Channel A, outage duration over threshold ROKA Channel A, received data ok Date Code 20020426 Setting the Relay 9-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 416 Phase-to-phase CA voltage sag element Version 7) SWAB Phase-to-phase AB voltage swell element (see Figure 3.33) SWBC Phase-to-phase BC voltage swell element SWCA Phase-to-phase CA voltage swell element 9-30 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 417 Positive-sequence overvoltage element (positive- Testing sequence voltage greater than setting VNOM • 0.75 (wye-connected) or VNOM • 0.43 (delta- connected); see Figure 4.1) V0GAIN V0 based on gained data Date Code 20020426 Setting the Relay 9-31 SEL-351-5, -6, -7 Instruction Manual...
  • Page 418 F32W Forward directional output for Petersen Coil Wattmetric element (an input to F32N logic) R32W Reverse directional output for Petersen Coil Wattmetric element (an input to R32N logic) 9-32 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 419 (TID). The Relay Identifier is typically used to identify the relay or the type of protection scheme. Typical Terminal Identifiers include an abbreviation of the substation name and line terminal. Date Code 20020426 Setting the Relay 9-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 420 Figure 2.16). Settings for Voltage Input Configuration SEL-351-5, -6, -7 Relays with firmware version R308 or lower can only accept wye-connected PTs to the voltage inputs, and can only use voltage input VS as a synchronism check voltage/auxiliary voltage input. Beginning with firmware revision R309, these relays have two new global settings, PTCONN and VSCONN;...
  • Page 421 * The PTRS/PTR adjustment brings the broken-delta 3V0 quantity to the same base voltage as the relay impedance settings, which are based on the VA, VB, VC voltage base. Date Code 20020426 Setting the Relay 9-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 422 In both cases noted in this table, the metering or power element accuracy will be reduced in conditions of system unbalance. *** The PTRS/PTR adjustment brings the broken-delta 3V0 quantity to the same base voltage as the relay phase voltages. 9-36 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 423 DIR1 - DIR4 Loss-of-Potential Logic (enable setting Available Not available (can only ELOP) set ELOP = N); Output Relay Word bits disabled (LOP = logical 0, V1GOOD = logical Date Code 20020426 Setting the Relay 9-37 SEL-351-5, -6, -7 Instruction Manual...
  • Page 424 SER) and in automatically making directional element settings Z2F, Z2R, Z0F, and Z0R (see Settings Made Automatically in Section 4: Loss-of-Potential Logic, Load Encroachment, and Directional Element Logic). A corresponding line length setting (LL) is also used in the fault locator. 9-38 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 425 The global settings NFREQ and PHROT allow you to configure the SEL-351 Relay to your specific system. Set NFREQ equal to your nominal power system frequency, either 50 Hz or 60 Hz. Date Code 20020426 Setting the Relay 9-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 426 Specifications for information on 5 A nominal and 1 A nominal ordering options (and additional 0.2 A nominal and 0.05 A nominal options for neutral channel IN) and how they influence overcurrent element setting ranges. 9-40 Setting the Relay Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 427 ETTINGS HEET Page 1 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL To avoid lost settings, enter global settings first (Settings Sheets 22–23) if global settings PTCONN or VSCONN are going to be changed. Refer to subsection In Some Applications, Make Global Settings (SET G) First in Section 9: Setting the Relay.
  • Page 428 ETTINGS HEET Page 2 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Instantaneous/Definite-Time Overcurrent Enable Settings Phase element levels (N, 1–6) (see Figures 3.1, 3.2, 3.3, and 3.7) E50P = Neutral ground element levels—channel IN (N, 1–6) E50N = (see Figures 3.8 and 3.9)
  • Page 429 ETTINGS HEET Page 3 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase Inst./Def.-Time Overcurrent Elements (See Figures 3.1, 3.2, and 3.3) (Number of phase element pickup settings dependent on preceding enable setting E50P = 1–6) Pickup (OFF, 0.25–100.00 A {5 A nom.}, 0.05–20.00 A {1 A nom.})
  • Page 430 ETTINGS HEET Page 4 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Neutral Ground Definite-Time Overcurrent Elements (See Figure 3.8) (Number of neutral ground element time delay settings dependent on preceding enable setting E50N = 1–6;...
  • Page 431 ETTINGS HEET Page 5 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Negative-Sequence Definite-Time Overcurrent Elements (See Figure 3.12)* (Number of negative-sequence element time delay settings dependent on preceding enable setting E50Q = 1–6; all four time delay settings are enabled if E50Q ≥ 4) Time delay (0.00–16000.00 cycles in 0.25-cycle steps)
  • Page 432 ETTINGS HEET Page 6 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Neutral Ground Time-Overcurrent Element—Channel IN (See Figure 3.18) (Make the following settings if preceding enable setting E51N = Y) Pickup (OFF, 0.500–16.000 A {5 A nom.}, 0.100–3.200 A {1 A nom.}, 51NP = 0.005–0.640 A {0.2 A nom.}, 0.005–0.160 A {0.05 A nom.})
  • Page 433 ETTINGS HEET Page 7 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Directional Elements (See Directional Control Settings in Section 4) (Make settings DIR1–DIR4 and ORDER if preceding enable setting E32 = Y or AUTO)
  • Page 434 ETTINGS HEET Page 8 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL (Make settings 50GFP, 50GRP, and a0 if preceding enable setting E32 = Y and preceding setting ORDER contains V or I. If E32 = AUTO and ORDER contains V or I, these settings are made automatically.)
  • Page 435 ETTINGS HEET Page 9 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Phase overvoltage pickup 59P1P = (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs})
  • Page 436 ETTINGS HEET Page 10 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Channel VS undervoltage pickup 27SP = (OFF, 0.00–150.00 V secondary {150 V voltage inputs}) (OFF, 0.00–300.00 V secondary {300 V voltage inputs})
  • Page 437 ETTINGS HEET Page 11 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Frequency Element (See Figures 3.29, 3.30, and 3.31) (Make the following settings if preceding enable setting E81 = 1–6) Phase undervoltage block 27B81P = (12.50–150.00 V secondary, 150 V voltage inputs;...
  • Page 438 ETTINGS HEET Page 12 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL POTT Trip Scheme Settings (Also Used in DCUB Trip Schemes) (See Figure 5.6) (Make the following settings if preceding enable setting ECOMM = POTT, DCUB1, or DCUB2) Zone (level) 3 reverse block time delay (0.00–16000.00 cycles in...
  • Page 439 ETTINGS HEET Page 13 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL Other Settings (Make the following settings—they have no controlling enable setting) Minimum trip duration time (4.00–16000.00 cycles in 0.25-cycle steps) TDURD = (see Figure 5.1)
  • Page 440 ETTINGS HEET Page 14 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL SV14 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps) SV14PU = SV14 Dropout Time (0.00–16000.00 cycles in 0.25-cycle steps) SV14DO = SV15 Pickup Time (0.00–16000.00 cycles in 0.25-cycle steps)
  • Page 441 ETTINGS HEET Page 15 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date ELAY ETTINGS ERIAL OMMAND RONT ANEL (Make setting PWR4P if EPWR = 4) Per Phase Power Element Pickup PWR4P = (OFF, 2.00–13000.00 VA secondary per phase {5 A nom}) (OFF, 0.40–2600.00 VA secondary per phase {1 A nom})
  • Page 442 ETTINGS HEET Page 16 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND control equation settings consist of Relay Word bits (see Table 9.3) and SEL control OGIC OGIC equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), and ( ) (parentheses).
  • Page 443 ETTINGS HEET Page 17 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Latch Bits Set/Reset Equations (See Figure 7.12) Set Latch Bit LT1 SET1 = Reset Latch Bit LT1 RST1 =...
  • Page 444 ETTINGS HEET Page 18 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Torque Control Equations for Inst./Def.-Time Overcurrent Elements [Note: torque control equation settings cannot be set directly to logical 0] Level 1 phase (see Figure 3.3)
  • Page 445 ETTINGS HEET Page 19 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Control Equation Variable SV9 SV9 = OGIC Control Equation Variable SV10 SV10 = OGIC Control Equation Variable SV11...
  • Page 446 ETTINGS HEET Page 20 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND Display Point DP7 DP7 = Display Point DP8 DP8 = Display Point DP9 DP9 = Display Point DP10...
  • Page 447 ETTINGS HEET Page 21 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET L) OGIC ONTROL QUATION ETTINGS ERIAL OMMAND ™ Transmit Equations (Available in Firmware Versions 6 and Greater; see IRRORED Appendix I) Channel A, transmit bit 1...
  • Page 448 ETTINGS HEET Page 22 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL To avoid lost settings, enter global settings first (Settings Sheets 22–23) if global settings PTCONN or VSCONN are going to be changed. Refer to subsection In Some Applications, Make Global Settings (SET G) First in Section 9: Setting the Relay.
  • Page 449 ETTINGS HEET Page 23 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET G LOBAL ETTINGS ERIAL OMMAND RONT ANEL Optoisolated Input Timers for Models 0351x0, 0351x1, and 0351xY (See Figure 7.1) Input IN101 debounce time (AC, 0.00–1.00 cycles in 0.25-cycle steps) IN101D = Input IN102 debounce time (AC, 0.00–1.00 cycles in 0.25-cycle steps)
  • Page 450 ETTINGS HEET Page 24 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET R) EQUENTIAL VENTS ECORDER AND ROFILE ETTINGS ERIAL OMMAND Sequential Events Recorder settings are comprised of three trigger lists. Each trigger list can include up to 24 Relay Word bits delimited by commas.
  • Page 451 ETTINGS HEET Page 25 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Enter the following characters: 0–9, A–Z, -, /, ., space for each text label setting, subject to the specified character limit. Enter NA to null a label.
  • Page 452 ETTINGS HEET Page 26 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB8 Name (14 characters) NLB8 = Clear Local Bit LB8 Label (7 characters) CLB8 = Set Local Bit LB8 Label (7 characters)
  • Page 453 ETTINGS HEET Page 27 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Local Bit LB16 Name (14 characters) NLB16 = Clear Local Bit LB16 Label (7 characters) CLB16 = Set Local Bit LB16 Label (7 characters)
  • Page 454 ETTINGS HEET Page 28 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET T) ABEL ETTINGS ERIAL OMMAND Display if DP14 = logical 1 (16 characters) DP14_1 = Display if DP14 = logical 0 (16 characters) DP14_0 =...
  • Page 455 ETTINGS HEET Page 29 of 29 SEL-351-5, -6, -7 R OR THE ELAY Date SET P ETTINGS ERIAL OMMAND RONT ANEL Protocol Settings (See Below) Protocol (SEL, LMD, DNP, DNPE, MBA, MBB, MB8A, PROTO = MB8B) Protocol Settings Set PROTO = SEL for standard SEL ASCII protocol. For SEL Distributed Port Switch Protocol (LMD), set PROTO = LMD.
  • Page 457 LDP Command (Load Profile Report—Available in Firmware Versions 6 and 7) ........................ 10-18 MET Command (Metering Data) ................10-19 MET k—Instantaneous Metering ..............10-19 MET X k—Extended Instantaneous Metering ..........10-20 MET D—Demand Metering................10-22 Date Code 20020426 Serial Port Communications and Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 458 PAS Command (View/Change Passwords).............. 10-40 SET Command (Change Settings)................10-41 VER Command (Show Relay Configuration and Firmware Version) ..... 10-41 SEL-351-5, -6, -7 Relay Command Summary ................. 10-43 TABLES Table 10.1: SEL-351 Relay Models and Available Serial Ports ............10-1 Table 10.2: Pinout Functions for EIA-232 Serial Ports 2, 3, and F ............

  • Page 459: Section 10: Serial Port Communications And Commands

    To change the port settings, use the SET P command (see Section 9: Setting the Relay) or the front-panel SET pushbutton. ONNECTOR AND OMMUNICATIONS ABLES (female chassis connector, as viewed from outside panel) Figure 10.1: DB-9 Connector Pinout for EIA-232 Serial Ports Date Code 20020426 Serial Port Communications and Commands 10-1 SEL-351-5, -6, -7 Instruction Manual...

  • Page 460: Irig-B

    The following cable diagrams show several types of EIA-232 serial communications cables that connect the SEL-351 Relay to other devices. These and other cables are available from SEL. Contact the factory for more information. 10-2 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 461: Sel-351 To Computer

    3 RXD (OUT) CTS 8 CD (OUT) GND 9 1 GND DTE = Data Terminal Equipment (Computer, Terminal, Printer, etc.) ** DCE = Data Communications Equipment (Modem, etc.) Date Code 20020426 Serial Port Communications and Commands 10-3 SEL-351-5, -6, -7 Instruction Manual...
  • Page 462 9-Pin Male “D” Subconnector “D” Subconnector RXD 2 3 TXD TXD 3 2 RXD GND 5 5 GND RTS 7 7 RTS CTS 8 8 CTS 10-4 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 463: Communications Protocol

    To select SEL ASCII protocol, set the port PROTO setting to SEL. To select SEL Distributed Port Switch Protocol (LMD), set PROTO = LMD. To select DNP protocol, set PROTO = DNP. Date Code 20020426 Serial Port Communications and Commands 10-5 SEL-351-5, -6, -7 Instruction Manual...
  • Page 464 Messages will be accepted after the relay receives XON. The CAN character (ASCII hex 18) aborts a pending transmission. This is useful in termi- nating an unwanted transmission. 10-6 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 465: Mirrored Bits

    When a serial port AUTO setting is DTA, the SEL-351 Relay is compatible with the SEL-DTA2 on that port. The MET and MET D command responses are modified to comply with the DTA2 data format for that port. Date Code 20020426 Serial Port Communications and Commands 10-7 SEL-351-5, -6, -7 Instruction Manual...
  • Page 466 The ACC command takes the relay to Access Level 1 [see ACC, BAC, and 2AC Commands (Go to Access Level 1, B, or 2) in the Command Explanations subsection for more detail]. 10-8 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 467: Access Level 0

    Enter the 2AC command at the Access Level B prompt: ==>2AC <ENTER> Access Level 2 When the relay is in Access Level 2, the relay sends the prompt: =>> Date Code 20020426 Serial Port Communications and Commands 10-9 SEL-351-5, -6, -7 Instruction Manual...

  • Page 468: Command Summary

    Again, a higher access level can access the serial port commands in a lower access level. The commands are shown in upper-case letters, but they can also be entered with lower-case letters. 10-10 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 469 Pulse output contact CNTRL =>> Control remote bit =>> Copy setting group =>> Loopback =>> View/change passwords =>> Change settings =>> Show relay configuration and firmware version Date Code 20020426 Serial Port Communications and Commands 10-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 470: Command Explanations

    ACC moves from Access Level 0 to Access Level 1. BAC moves from Access Level 1 to Access Level B. 2AC moves from Access Level 1 or B to Access Level 2 10-12 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 471: Password Requirements

    Because the Password jumper is in place, the relay does not ask for a password; it goes directly to Access Level 1. The relay responds: FEEDER 1 Date: 03/05/01 Time: 08:31:10.361 STATION A Level 1 => Date Code 20020426 Serial Port Communications and Commands 10-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 472 , see Appendix I: M (In Firmware IRRORED IRRORED Versions 6 and 7). To get a summary report, enter the command with the channel parameter (A or B). 10-14 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 473 To receive a summary report for a subset of the records, use one of the above methods while omitting the L parameter. Date Code 20020426 Serial Port Communications and Commands 10-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 474 If no parameters are specified with the HIS command: =HIS <ENTER> the relay displays the most recent event summaries in reverse chronological order. 10-16 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 475 A-phase faults (Petersen Coil or Ungrounded/High-Impedance Grounded Systems only) for B-phase faults (Petersen Coil or Ungrounded/High-Impedance Grounded Systems only) for C-phase faults (Petersen Coil or Ungrounded/High-Impedance Grounded Systems only) Date Code 20020426 Serial Port Communications and Commands 10-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 476 Use the LDP command to view the Load Profile report. For more information on Load Profile reports, see Section 8: Breaker Monitor, Metering, and Load Profile Functions. 10-18 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 477 (1–32767) to repeat the meter display. If k is not specified, the meter report is displayed once. Date Code 20020426 Serial Port Communications and Commands 10-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 478 Single-phase megavars (wye-connected voltage inputs only) A,B,C MVAR Three-phase megavars Power Factor PF Single-phase power factor; leading or lagging (wye-connected A,B,C voltage inputs only) Three-phase power factor; leading or lagging 10-20 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 479 0.010 0.044 0.999 0.999 1.000 1.000 32.036 6.196 7.526 14.759 0.131 0.212 (DEG) -1.47 106.38 -117.52 0.33 -59.08 157.40 FREQ (Hz) 60.00 VDC (V) 125.6 =>> Date Code 20020426 Serial Port Communications and Commands 10-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 480 Three-phase megavar hours (in and out) Reset Time Last time the energy meter was reset To view energy metering values, enter the command: =>MET E <ENTER> 10-22 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 481 LAST RESET 01/27/01 15:31:41.237 => Reset the maximum/minimum values using the MET RM command. All values will display RESET until new maximum/minimum values are recorded. For more information on Date Code 20020426 Serial Port Communications and Commands 10-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 482 You may append a setting name to each of the commands to specify the first setting to display (e.g., SHO 1 E50P displays the setting Group 1 relay settings starting with setting E50P). The default is the first setting. 10-24 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 483 ULTR =!(51P + 51G) LOG1 LOG2 =IN101 =CC + LB4 ULCL =TRIP 79RI =TRIP 79RIS =52A + 79CY 79DTL =OC + !IN102 + LB3 79DLS =79LO Date Code 20020426 Serial Port Communications and Commands 10-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 484 67N1TC=1 67N2TC=1 67N3TC=1 67N4TC=1 67G1TC=1 67G2TC=1 67G3TC=1 67G4TC=1 67Q1TC=1 67Q2TC=1 67Q3TC=1 67Q4TC=1 51ATC =1 51BTC =1 51CTC =1 51PTC =1 51NTC =1 51GTC =1 51QTC =1 10-26 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 485 OUT210=0 OUT211=0 OUT212=0 =IN102 =52A Press RETURN to continue DP10 DP11 DP12 DP13 DP14 DP15 DP16 =/51P + /51G + /OUT103 FAULT =51P + 51G BSYNCH=52A Date Code 20020426 Serial Port Communications and Commands 10-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 486 KASP3 = 20.00 =>> =>>SHO P <ENTER> Port F PROTO = SEL SPEED = 2400 BITS PARITY= N STOP T_OUT = 15 AUTO RTSCTS= N FASTOP= N =>> 10-28 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 487 Use the SSI command to view the voltage Sag, Swell, and Interruption report. For more information on SSI reports, see Section 12: Standard Event Reports, Sag/Swell/Interruption Report, and SER. Date Code 20020426 Serial Port Communications and Commands 10-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 488 Extra I/O board status (model 0351x1 only—see Table 1.1 and Figure 2.3 and 2.26). W (Warning) or F (Failure) is appended to the values to indicate an out-of-tolerance condition. 10-30 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 489 Relay Word row display. If k is not specified, the Relay Word TAR ROW n k row is displayed once. Adding ROW to the command displays the Relay Word Row number at the start of each line. Date Code 20020426 Serial Port Communications and Commands 10-31 SEL-351-5, -6, -7 Instruction Manual...
  • Page 490 Lockout State (79LO = logical 1), and the shot is at shot = 1 (SH1 = logical 1). Command TAR 35 will report the same data since the SH1 bit is in Row 35 of the Relay Word. 10-32 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 491 Note: After setting the time, allow at least 60 seconds before powering down the relay or the new setting may be lost. TRI Command (Trigger Event Report) Issue the TRI command to generate an event report: =>TRI <ENTER> Triggered => Date Code 20020426 Serial Port Communications and Commands 10-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 492 BRE W command, the values echoed after the “Invalid format, changes not saved” message are the previous BRE values, unchanged by the aborted BRE W attempt. 10-34 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 493 See the Note in the Set Close discussion, following Figure 6.1, for more information concerning Relay Word bit CC and its recommended use, as used in the factory settings. Date Code 20020426 Serial Port Communications and Commands 10-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 494 Active Group = 1 ==> For more information on setting group selection, see Multiple Setting Groups in Section 7: Inputs, Outputs, Timers, and Other Control Logic. 10-36 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 495 Table 2.6). If the Breaker is not in place (Breaker jumper = OFF), the relay does not execute the PUL command and responds: Aborted: No Breaker Jumper Date Code 20020426 Serial Port Communications and Commands 10-37 SEL-351-5, -6, -7 Instruction Manual...
  • Page 496 ALARM output pulses if you copy settings into the active group. This is similar to a Group Change (see Section 7: Inputs, Outputs, Timers, and Other Control Logic). 10-38 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 497 IRRORED channel specifier in the disable command will cause both channels to be disabled. =>> LOO R <ENTER> loopback is disabled on both channels. =>> Date Code 20020426 Serial Port Communications and Commands 10-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 498 (Password jumper = OFF)], simply set the password to DISABLE. For example, PAS 1 DISABLE disables password protection for Level 1. 10-40 Serial Port Communications and Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 499 Mirrored Bits Load Profile Enhanced Integration Bits & Fast SER SELboot checksum XXXX OK FID=SEL-351-7-RXXX-V0-Z005005-DXXXXXXXX SELboot-311-R102 If above information is unexpected, contact SEL for assistance =>> Date Code 20020426 Serial Port Communications and Commands 10-41 SEL-351-5, -6, -7 Instruction Manual...
  • Page 501 EVE n Ly Show first y cycles of event report n (y = 1 to global setting LER). EVE n V Show event report n with variable scaling for analog values. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 502 Show latest n rows in SSI report (n = 1 to several thousand, where 1 is the most recent entry). Show rows m through n in SSI report (m = 1 to several thousand). Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 503 (t = 1–5000, default is 5). p DATA Set M port p to loopback. DATA allows the received M elements IRRORED IRRORED to change during the loopback test. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 504 Exits setting editing session, then prompts user to save settings. Ctrl - X Aborts setting editing session without saving changes. Available in firmware versions 6 and 7. Available in firmware version 7. Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 505 Figure 11.5: Local Control Switch Configured as an ON/OFF Switch..........11-7 Figure 11.6: Local Control Switch Configured as an OFF/MOMENTARY Switch ......11-7 Figure 11.7: Local Control Switch Configured as an ON/OFF/MOMENTARY Switch....... 11-7 Date Code 20020426 Front-Panel Interface SEL-351-5, -6, -7 Instruction Manual...
  • Page 507 METER pushbutton, refer to the MET Command (Metering Data) in Section 10. Some of the front-panel primary functions do not have serial port command equivalents. These are discussed in the following Functions Unique to the Front-Panel Interface. Date Code 20020426 Front-Panel Interface 11-1 SEL-351-5, -6, -7 Instruction Manual...
  • Page 508 Use the up/down arrow pushbuttons to then change the digit. Press the SELECT pushbutton once the correct Access Level B or Access Level 2 password is ready to enter. 11-2 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 509 After a primary function is selected (see Figure 11.2 and Figure 11.3), the pushbuttons then revert to operating on their secondary functions (see Figure 11.4). Use the left/right arrows to underscore a desired function. Then press the SELECT pushbutton to select the function. Date Code 20020426 Front-Panel Interface 11-3 SEL-351-5, -6, -7 Instruction Manual...
  • Page 510 Press the EXIT pushbutton to return to the default display and have the primary pushbutton functions activated again (see Figure 11.2 and Figure 11.3). Figure 11.4: SEL-351 Relay Front-Panel Pushbuttons—Secondary Functions 11-4 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 511 RECLOSE COUNT = 0. If the breaker is open and the reclosing relay is locked out after a reclose sequence (LO LED on front panel is illuminated), RECLOSE COUNT = 2. Date Code 20020426 Front-Panel Interface 11-5 SEL-351-5, -6, -7 Instruction Manual...
  • Page 512 (front-panel LO LED extinguishes and RS LED illuminates), and the shot counter returns to 0. The reclosing relay shot counter screen appears as: SET RECLOSURES=2 RECLOSE COUNT =0 11-6 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 513 [see Section 9: Setting the Relay and SHO Command (Show/View Settings) in Section 10: Serial Port Communications and Commands]. See Local Control Switches in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more information on local control. Date Code 20020426 Front-Panel Interface 11-7 SEL-351-5, -6, -7 Instruction Manual...
  • Page 514 There are no more local control switches in the factory default settings. Press the right arrow pushbutton, and scroll to the “output contact testing” function: Output Contact←→ Testing This front-panel function provides the same function as the serial port PUL command (see Figure 11.3). 11-8 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 515 On the display, the MANUAL TRIP switch is shown to be in the TRIP position for 2 seconds (long enough to be seen), and then it returns to the RETURN position: MANUAL TRIP ←→ Position: RETURN Date Code 20020426 Front-Panel Interface 11-9 SEL-351-5, -6, -7 Instruction Manual...
  • Page 516 79DTL = !LB1 + LB3 [=NOT(LB1) + LB3] See Drive-to-Lockout and Drive-to-Last Shot Settings (79DTL and 79DLS, respectively) in Section 6: Close and Reclose Logic for more information on setting 79DTL. 11-10 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 517 (breaker status, see Figure 7.3) Optoisolated input IN102 is used as a recloser enable/disable. 52A is the circuit breaker status (see Optoisolated Inputs in Section 7: Inputs, Outputs, Timers and Other Control Logic). Date Code 20020426 Front-Panel Interface 11-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 518 79 ENABLED DP2_0 = BREAKER OPEN BREAKER CLOSED REMOVAL OF THIS PANEL EXPOSES CIRCUITRY WHICH MAY CAUSE DWG. M351263C ELECTRICAL SHOCK THAT CAN RESULT IN INJURY OR DEATH DWG. M351148 11-12 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 519 8 seconds for 1 second as a reminder that the display is in Scroll Lock Control mode. Scroll lock OFF SELECT to Lock Date Code 20020426 Front-Panel Interface 11-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 520 Front-Panel Neutral / Ground Current Display Global setting FPNGD (Front-Panel Neutral/Ground Display) selects whether IG, IN, or neither is displayed on the front-panel rotating display. Setting choices are: FPNGD = IN FPNGD = IG 11-14 Front-Panel Interface Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 521 Additional Rotating Default Display Example See Figure 5.17 and accompanying text in Section 5: Trip and Target Logic for an example of resetting a rotating default display with the TARGET RESET pushbutton. Date Code 20020426 Front-Panel Interface 11-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 523 Resetting the SSI Recorder Logic ..................12-43 Sample SSI Report ......................12-44 Using the SSI Recorder on Ungrounded/High-Impedance Grounded and Petersen Coil Systems......................12-45 Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER SEL-351-5, -6, -7 Instruction Manual...
  • Page 524 Figure 12.6: Example Sequential Events Recorder (SER) Event Report ..........12-35 Figure 12.7: Example Sag/Swell/Interruption (SSI) Report (PTCONN = WYE)........ 12-44 Figure 12.8: Example Sag/Swell/Interruption (SSI) Report (PTCONN = DELTA) ......12-45 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 525 64-cycles, or once per day. The most recent 3,855 SSI entries are always available from nonvolatile memory, and up to 3,855 older entries may also be available. See Figure 12.7 for an example SSI report. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-1 SEL-351-5, -6, -7 Instruction Manual...
  • Page 526 Relay Word bit TRIP (in Figure 5.1) is usually assigned to an output contact for tripping a circuit breaker (e.g., SEL control equation setting OUT101 = TRIP). OGIC 12-2 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 527 PUL command, the relay triggers a standard event report. The PUL command is available at the serial port and the relay front-panel CNTRL pushbutton. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-3 SEL-351-5, -6, -7 Instruction Manual...
  • Page 528 Note the correspondence to the preceding event report triggering conditions (see Standard Event Report Triggering in this section). 12-4 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 529 S0TF, 50, 51, and 81. If there is no rising edge of TRIP in the report, the Targets field is blank. See Front-Panel Target LEDs in Section 5: Trip and Target Logic. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-5 SEL-351-5, -6, -7 Instruction Manual...
  • Page 530 Specifies variable scaling for analog values. Display the report in Compressed ASCII format. Specifies only the Communication element section of the event is displayed. 12-6 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 531 (see Figures 7.1 and 7.2 in Section 7: Inputs, Outputs, Timers, and Other Control Logic). Raw event reports display one extra cycle of data at the beginning of the report. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-7 SEL-351-5, -6, -7 Instruction Manual...
  • Page 532 (primary kV, PTCONN = DELTA)** Power system phase-to-phase voltage V (primary kV, PTCONN = DELTA)** Power system phase-to-phase voltage V (primary kV, PTCONN = DELTA)** 12-8 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 533 -0.2 13.3 -12.9 -8.2 125 60.01 .45..-181 -14.8 -13.6 125 60.01 .45..-160 -13.4 12.9 8.2 125 60.01 .45..Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-9 SEL-351-5, -6, -7 Instruction Manual...
  • Page 534 Output contact OUT102 asserted. Both OUT101 and OUT102 asserted. **Out 34 OUT103, OUT104 Output contact OUT103 asserted. Output contact OUT104 asserted. Both OUT103 and OUT104 asserted. 12-10 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 535 Both 50A and 50B picked up. Both 50B and 50C picked up. Both 50C and 50A picked up. 50A, 50B, and 50C picked up. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 536 Coil grounded [wattmetric element], and ungrounded/high-impedance grounded systems). R32N Reverse element R32N picked up (low-impedance grounded, Petersen Coil grounded [wattmetric element], and ungrounded/high-impedance grounded systems). 12-12 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 537 27A_ and 27B_ elements picked up. 27B_ and 27C_ elements picked up. 27C_ and 27A_ elements picked up. 27A_, 27B_ and 27C_ elements picked up. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 538 59A_ and 59B_ elements picked up. 59B_ and 59C_ elements picked up. 59C_ and 59A_ elements picked up. 59A_, 59B_ and 59C_ elements picked up. 12-14 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 539 First channel VS instantaneous overvoltage element 59S1 picked up. Second channel VS instantaneous overvoltage element 59S2 picked up. Both 59S1 and 59S2 picked up. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 540 Close failure condition (CF asserts for only 1/4 cycle). Reclosing relay in Reset State (79RS). Reclosing relay in Reclose Cycle State (79CY). Reclosing relay in Lockout State (79LO). 12-16 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 541 Remote bit RB4 asserted. Both RB3 and RB4 asserted. Rem 56 RB5, RB6 Remote bit RB5 asserted. Remote bit RB6 asserted. Both RB5 and RB6 asserted. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 542 SV16, SV16T OGIC Three pole open condition 3PO asserted. SOTF SOTFE Switch-onto-fault SOTF enable asserted. Permissive trip signal to POTT logic PT asserted. 12-18 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 543 TMB3A, TMB4A channel A transmit IRRORED bit 3 TMB3A asserted. channel A transmit IRRORED bit 4 TMB4A asserted. Both TMB3A and TMB4A asserted. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 544 TMB3B, TMB4B channel B transmit IRRORED bit 3 TMB3B asserted. channel B transmit IRRORED bit 4 TMB4B asserted. Both TMB3B and TMB4B asserted. 12-20 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 545 Both ROKA and ROKB asserted. RBAD RBADA, RBADB channel A extended IRRORED outage RBADA asserted. channel B extended IRRORED outage RBADB asserted. Both RBADA and RBADB asserted. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-21 SEL-351-5, -6, -7 Instruction Manual...
  • Page 546 Level 3 C-phase power element PWR C 34 PWR3C picked up. Level 4 C-phase power element PWR4C picked up. Both PWR3C and PWR4C picked up. 12-22 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 547 Relay newly powered up or settings changed Each entry in the SER includes SER row number, date, time, element name, and element state. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-23 SEL-351-5, -6, -7 Instruction Manual...
  • Page 548 (top) of the report and the latest row (row 10) at the end (bottom) of the report. Chronological progression through the report is down the page and in descending row number. 12-24 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 549 Clear the SER report from nonvolatile memory with the SER C command as shown in the following example: =>SER C <ENTER> Clear the SER Are you sure (Y/N) ? Y <ENTER> Clearing Complete Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-25 SEL-351-5, -6, -7 Instruction Manual...
  • Page 550 24 60.01 1... b.. -6.0 11.4 -5.1 24 60.25 1... b.. -9.8 -1.2 10.9 24 60.25 1... 2.. -12.0 -0.0 24 60.32 1... 2.. 12-26 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 551 ...r.r......C.0 ....p..........C.0 ....p..........C.0 ....p....Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-27 SEL-351-5, -6, -7 Instruction Manual...
  • Page 552 GDEMP = 1.50 QDEMP = 1.50 TDURD = 9.00 = 60.00 3POD = 1.50 50LP = 0.25 SV1PU = 12.00 SV1DO = 2.00 12-28 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 553 SET14 =0 RST14 =0 SET15 =0 RST15 =0 SET16 =0 RST16 =0 67P1TC=1 67P2TC=1 67P3TC=1 67P4TC=1 67N1TC=1 67N2TC=1 67N3TC=1 67N4TC=1 67G1TC=1 67G2TC=1 67G3TC=1 67G4TC=1 Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-29 SEL-351-5, -6, -7 Instruction Manual...
  • Page 554 OUT106=0 OUT107=0 OUT201=0 OUT202=0 OUT203=0 OUT204=0 OUT205=0 OUT206=0 OUT207=0 OUT208=0 OUT209=0 OUT210=0 OUT211=0 OUT212=0 =IN102 =52A DP10 DP11 DP12 DP13 DP14 DP15 DP16 12-30 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 555 RMS values. Figure 12.5 shows how the event report current column data can be converted to phasor RMS values. Voltages are processed similarly. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-31 SEL-351-5, -6, -7 Instruction Manual...
  • Page 556 59.99 Targets: Currents (A Pri), ABCNGQ: Group 1 Group Settings: ****** NOT SHOWN ***** Figure 12.3: Example Partial Event Report with Delta-Connected PTs 12-32 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 557 In Figure 12.4, note that any two rows of current data from the event report in Figure 12.2, 1/4 cycle apart, can be used to calculate RMS current values. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-33 SEL-351-5, -6, -7 Instruction Manual...
  • Page 558 Figure 12.5: Derivation of Phasor RMS Current Values From Event Report Current Values 12-34 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 559 # column numbers in Figure 12.6. The SER event report in Figure 12.6 contains records of events that occurred before and after the standard event report in Figure 12.2. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-35 SEL-351-5, -6, -7 Instruction Manual...
  • Page 560 Close output contact OUT102 asserts for first automatic reclose. Related settings: 79OI1 = 30.000 Time difference: 09:28:32.374 – 09:28:31.879 = 0.495 seconds (= 30 cycles) 12-36 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 561 Vbase = 3 • (memorized positive-sequence voltage, V ) (delta-connected) • Phase A, B, and C SSI element status columns; see Table 12.4 Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-37 SEL-351-5, -6, -7 Instruction Manual...
  • Page 562 Data overflow (single entry that Single entry indicates that data was lost prior to the present entry) See Figure 12.7 for an example Sag/Swell/Interruption (SSI) report. 12-38 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 563 “.”, “O”, “U”, “I”. The Fast/End recording mode continues until four cycles elapse with no SSI element or manual trigger condition changing state. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-39 SEL-351-5, -6, -7 Instruction Manual...
  • Page 564 If the SSI recorder memory clears while an SSI report is being displayed, the SSI report will stop and display this message: Command Aborted, Data overwrite occurred 12-40 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 565 (top) of the report and the latest row (date 3/23/00) at the end (bottom) of the report. Chronological progression through the report is down the page and in descending row number. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-41 SEL-351-5, -6, -7 Instruction Manual...
  • Page 566 =>SSI T <ENTER> Triggered The SSI T command is only available if group setting ESSI = Y in the active setting group. 12-42 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 567 • After a group change or setting change that changes active setting ESSI = N to ESSI = Y. • After a STA C command (Level 2) Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-43 SEL-351-5, -6, -7 Instruction Manual...
  • Page 568 Table 12.4. Note that the voltage column headings are now Vab, Vbc, and Vca, and that the Vbase value is scaled by 3 to account for the phase-to-phase quantities (as compared to Figure 12.7). 12-44 Standard Event Reports, Sag/Swell/ Interruption Report, and SER Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 569 For details on the ungrounded/high-impedance grounded and Petersen Coil directional elements, see Directional Control for Neutral Ground and Residual Ground Overcurrent Elements in Section 4: Loss-of-Potential, Load Encroachment, and Directional Element Logic. Date Code 20020426 Standard Event Reports, Sag/Swell/ Interruption Report, and SER 12-45 SEL-351-5, -6, -7 Instruction Manual...
  • Page 571 Factory Assistance........................13-10 TABLES Table 13.1: Resultant Scale Factors for Input Module................13-4 Table 13.2: Relay Self-Tests ......................... 13-7 FIGURES Figure 13.1: Low-Level Test Interface (J1 or J10) Connector ............... 13-4 Date Code 20020426 Testing and Troubleshooting SEL-351-5, -6, -7 Instruction Manual...

  • Page 573: Introduction

    Commissioning tests should verify that the relay is properly connected to the power system and all auxiliary equipment. Verify control signal inputs and outputs. Check breaker auxiliary inputs, SCADA Date Code 20020426 Testing and Troubleshooting 13-1 SEL-351-5, -6, -7 Instruction Manual...

  • Page 574: Maintenance Testing

    At SEL, we recommend that maintenance tests on SEL relays be limited under the guidelines provided above. The time saved may be spent analyzing event data and thoroughly testing those systems that require more attention. 13-2 Testing and Troubleshooting Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 575 The processing module input (J10) has a maximum 9 V p-p voltage damage threshold. Remove the ribbon cable between the two modules to access the outputs (J1) of the input module and the inputs (J10) to the processing module (relay main board). Date Code 20020426 Testing and Troubleshooting 13-3 SEL-351-5, -6, -7 Instruction Manual...
  • Page 576 Power (+, –) 48/125 Vdc 125 Vdc 1.25 Vdc 100.00 125/250 Vdc Scale factor calculation examples:             3137 13-4 Testing and Troubleshooting Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 577: Test Methods

    (e.g., OUT101 through OUT107 OGIC for Model 0351x1) to the element under test. The available elements are the Relay Word bits referenced in Table 9.3. Date Code 20020426 Testing and Troubleshooting 13-5 SEL-351-5, -6, -7 Instruction Manual...
  • Page 578 • The relay displays failure messages on the relay LCD display for failures. Use the serial port STATUS command or front-panel STATUS pushbutton to view relay self-test status. 13-6 Testing and Troubleshooting Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 579 +100°C Failure Latched Performs a read/write test on system RAM every 60 seconds. Failure checksum Latched Performs a checksum test on the relay program memory every 10 seconds. Date Code 20020426 Testing and Troubleshooting 13-7 SEL-351-5, -6, -7 Instruction Manual...

  • Page 580: Relay Troubleshooting

    2. Check to see that the power is on. Do not turn the relay off. 3. Measure and record the voltage at all control inputs. 4. Measure and record the state of all output relays. 13-8 Testing and Troubleshooting Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 581: Troubleshooting Procedure

    3. Relay analog inputs not connected correctly. ELAY ALIBRATION The SEL-351 Relay is factory-calibrated. If you suspect that the relay is out of calibration, please contact the factory. Date Code 20020426 Testing and Troubleshooting 13-9 SEL-351-5, -6, -7 Instruction Manual...

  • Page 582: Factory Assistance

    We appreciate your interest in SEL products and services. If you have questions or comments, please contact us at: Schweitzer Engineering Laboratories, Inc. 2350 NE Hopkins Court Pullman, WA USA 99163-5603 Telephone: (509) 332-1890 Fax: (509) 332-7990 Internet: www.selinc.com 13-10 Testing and Troubleshooting Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 583 A5C0 Relay Definition Block ....................D-2 A5C1 Fast Meter Configuration Block ................D-2 A5D1 Fast Meter Data Block ....................D-4 A5C2/A5C3 Demand/Peak Demand Fast Meter Configuration Messages......D-4 A5D2/A5D3 Demand/Peak Demand Fast Meter Message ..........D-6 Date Code 20020426 Appendices Table of Contents SEL-351-5, -6, -7 Instruction Manual...
  • Page 584 Phase Time-Overcurrent Element 51PT Time-Out Indication ........G-2 Phase Time-Overcurrent Element 51PT Reset Indication..........G-2 Relay Word Bit Application Examples—Phase Time-Overcurrent Element 51PT........................G-2 Other Relay Word Bits ......................G-2 Control Equations......................G-3 OGIC Appendices Table of Contents Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 585 Message Decoding and Integrity Checks ................I-1 Synchronization........................I-2 Loop-Back Testing ........................ I-3 Channel Monitoring ......................I-3 Mirrored Bits Protocol For the Pulsar 9600 Baud Modem ............I-4 Settings............................I-4 Date Code 20020426 Appendices Table of Contents SEL-351-5, -6, -7 Instruction Manual...
  • Page 586 Figure B.13: Selecting the New Firmware to Send to the Relay............B-11 Figure B.14: Transfer of New Firmware to the Relay ................B-11 Figure F.1: Minimum Response Time Added to a Negative-Sequence Time-Overcurrent Element 51QT........................ F-2 Appendices Table of Contents Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 587 Overcurrent Element, 51EP................... F-6 Figure G.1: Result of Rising Edge Operators on Individual Elements in Setting ER ......G-6 Figure G.2: Result of Falling Edge Operator on a Deasserting Underfrequency Element......G-7 Date Code 20020426 Appendices Table of Contents SEL-351-5, -6, -7 Instruction Manual...
  • Page 589 PTs. − Added global setting VSCONN to allow the relay VS-NS terminals to be connected to a synchronism check voltage source (as before), or a broken-delta zero-sequence voltage source. Date Code 20020426 Firmware Versions SEL-351-5, -6, -7 Instruction Manual...
  • Page 590 − Updated BRE W command to allow for trip counters, accumulated interrupted current values, and percent breaker wear to be pre-loaded for each individual phase. Firmware Versions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 591 BRK_MON menu after selecting Yes or No. − Corrected an error in compressed event reports in which large negative values caused a comma delimiter to be omitted. Date Code 20020426 Firmware Versions SEL-351-5, -6, -7 Instruction Manual...
  • Page 592 Relay Word bits. − Corrected substation battery monitor implementation to allow both Relay Word bits DCLO and DCHI to assert when DCLOP is set higher than DCHIP. Firmware Versions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 593 − Lowered the minimum allowable setting for 27B81P (undervoltage block for frequency elements). − Added SEL-DTA2 compatibility. − A5C0 Relay Definition Block Changed. − Updated ID Message Response (see Appendix D.) Date Code 20020426 Firmware Versions SEL-351-5, -6, -7 Instruction Manual...
  • Page 594 (synchronizing phase) setting to accommodate compensation angle settings for synchronism check. − Changed DNP mapping command so that it now requests a confirmation before saving the map modification. SEL-351-x-R300-V0-D990621 Original Firmware Release Firmware Versions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 595 • Terminal emulation software that supports the XMODEM/CRC protocol (these ® ® instructions use HyperTerminal from a Microsoft Windows operating system) • Serial communications cable (SEL-C234A or equivalent) • Disk containing firmware upgrade file Date Code 20020426 Firmware Upgrade Instructions SEL-351-5, -6, -7 Instruction Manual...
  • Page 596 If there is no identification label, connect the cable to any computer serial port. Note that you may later have to change this computer serial port to establish communication between your relay and your computer. Step 13. Disconnect any other serial port connection. Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 597 Figure B.1: Establishing a Connection Figure B.2: Determining the Computer Serial Port Figure B.3: Determining Communications Parameters for the Computer Date Code 20020426 Firmware Upgrade Instructions SEL-351-5, -6, -7 Instruction Manual...
  • Page 598 From the File menu, choose Properties. You should see a dialog box similar to Figure B.6. b. Select a different port in the “Connect using:” list box and click OK. Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 599 Change settings in the appropriate list boxes and click OK. Figure B.7: Correcting Communications Parameters Step 5. After you have corrected settings, reestablish communication by pressing the icon showing the phone back on the hook (Figure B.8). Date Code 20020426 Firmware Upgrade Instructions SEL-351-5, -6, -7 Instruction Manual...
  • Page 600 Under the Transfer menu in HyperTerminal, select Capture Text and click Stop. Step 7. Print the text file you created in steps 4 through 6 and save this record for later reference. Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 601 Use the BAUD (BAU) command to change the data transmission rate in the relay. !>BAU 38400 <Enter> Match Computer Communications Speed to the Relay Step 1. In HyperTerminal, terminate communication (Figure B.5). Step 2. On the File menu, choose Properties. Date Code 20020426 Firmware Upgrade Instructions SEL-351-5, -6, -7 Instruction Manual...
  • Page 602 5 and 10 minutes at 38400 bps. Step 1. From the Transfer menu in HyperTerminal, select Receive File. You should see a dialog box similar to Figure B.10. Figure B.10: Example Receive File Dialog box Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 603 For a successful download, you should see a dialog box similar to Figure B.12. After the transfer, the relay will respond: “Download completed successfully!” Figure B.11: Example Filename Identifying Old Firmware Version Figure B.12: Downloading of Old Firmware Date Code 20020426 Firmware Upgrade Instructions SEL-351-5, -6, -7 Instruction Manual...
  • Page 604 If you do not start the transfer within about one minute, the relay times out and responds, “Upload failed – Communications failed!” If this happens, use the REC command again and restart the transfer. B-10 Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 605 (LED illumination may be delayed as long as two minutes). Press <Enter> to see if the Access Level 0 prompt “=” appears on your terminal screen. Date Code 20020426 Firmware Upgrade Instructions B-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 606 Step 3. Enter Access Level 2 by issuing the ACC and 2AC commands. Step 4. Go to Verify Calibration, Status, Breaker Wear, and Metering on page B-14. B-12 Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 607 Step 11. If any failure codes still appear on the relay display, see the testing and troubleshooting section in your relay instruction manual or contact the factory for assistance. Date Code 20020426 Firmware Upgrade Instructions B-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 608 Note: If an SEL-2020 or SEL-2030 Communications Processor is connected to the relay, re-autoconfigure the SEL-20x0 port. Failure to do so may cause automatic data collection failure if power to the communications processor is cycled. B-14 Firmware Upgrade Instructions Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 609 Note: You can use the front-panel SET pushbutton to change the port settings to return to SEL protocol. Date Code 20020426 SEL Distributed Port Switch Protocol SEL-351-5, -6, -7 Instruction Manual...
  • Page 611 Response From Relay ASCII Firmware ID String and Terminal ID Setting (TID) ASCII Names of Relay Word bits ASCII Names of bits in the A5B9 Status Byte Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 612 Time stamp offset 005C Digital offset 494100000000 Analog channel name (IA) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 613 VA channel index (VAB for delta) VB channel index (VBC for delta) VC channel index (VCA for delta) Reserved checksum 1-byte checksum of all preceding bytes Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 614 Scale factor offset in Fast Meter message 494E00000000 Analog channel name (IN) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 615 Scale factor offset in Fast Meter message 50432D000000 Analog channel name (PC-) Analog channel type Scale factor type 0000 Scale factor offset in Fast Meter message Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 616 If the STSET bit is set, the external device should request the A5C1, A5C2, and A5C3 messages. The external device can then determine if the scale factors or line configuration parameters have been modified. Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 617 Operate code, set remote bit RB12 Operate code, pulse remote bit RB12 Operate code, clear remote bit RB13 Operate code, set remote bit RB13 Operate code, pulse remote bit RB13 Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 618 OGIC following relay settings: via the SET L command, SV4 = RB4 SV4 input is RB4 OUT104 = SV4T route SV4 timer output to OUT104 Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 619 The Fast Operate Reset commands take the following form: Data Description A5ED Command Message Length—always 6 Operate Code (e.g., “00” for target reset, “TAR R”) Operate Validation—(4 + Operate Code) + 1 Checksum Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 620 (IN), is: <STX> "EN","TRIP","INST","COMM","SOTF","50","51","81","yyyy"<CR><LF> "A","B","C","G","N","RS","CY","LO","yyyy"<CR><LF> "50A1","50B1","50C1","50A2","50B2","50C2","50A3","50B3","yyyy"<CR><LF> "50C3","50A4","50B4","50C4","50AB1","50BC1","50CA1","50AB2","yyyy"<CR><LF> "50BC2","50CA2","50AB3","50BC3","50CA3","50AB4","50BC4","50CA4","yyyy"<CR><LF> "50A","50B","50C","51A","51AT","51AR","51B","51BT","yyyy"<CR><LF> "51BR","51C","51CT","51CR","51P","51PT","51PR","51N","yyyy"<CR><LF> "51NT","51NR","51G","51GT","51GR","51Q","51QT","51QR","yyyy"<CR><LF> "50P1","50P2","50P3","50P4","50N1","50N2","50N3","50N4","yyyy"<CR><LF> "67P1","67P2","67P3","67P4","67N1","67N2","67N3","67N4","yyyy"<CR><LF> "67P1T","67P2T","67P3T","67P4T","67N1T","67N2T","67N3T","67N4T","yyyy"<CR><LF> "50G1","50G2","50G3","50G4","50Q1","50Q2","50Q3","50Q4","yyyy"<CR><LF> "67G1","67G2","67G3","67G4","67Q1","67Q2","67Q3","67Q4","yyyy"<CR><LF> "67G1T","67G2T","67G3T","67G4T","67Q1T","67Q2T","67Q3T","67Q4T","yyyy"<CR><LF> "50P5","50P6","50N5","50N6","50G5","50G6","50Q5","50Q6","yyyy"<CR><LF> "50QF","50QR","50GF","50GR","32VE","32QGE","32IE","32QE","yyyy"<CR><LF> "F32P","R32P","F32Q","R32Q","F32QG","R32QG","F32V","R32V","yyyy"<CR><LF> "F32I","R32I","32PF","32PR","32QF","32QR","32GF","32GR","yyyy"<CR><LF> D-10 Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 621 "67P2S","67N2S","67G2S","67Q2S","PDEM","NDEM","GDEM","QDEM","yyyy"<CR><LF> "OUT201","OUT202","OUT203","OUT204","OUT205","OUT206","OUT207","OUT208","yyyy" <CR><LF> "OUT209","OUT210","OUT211","OUT212","*","*","*","*","yyyy"<CR><LF> "IN208","IN207","IN206","IN205","IN204","IN203","IN202","IN201","yyyy"<CR><LF> "*","*","*","*","*","*","*","*","yyyy"<CR><LF> "RMB8A","RMB7A","RMB6A","RMB5A","RMB4A","RMB3A","RMB2A","RMB1A","yyyy" <CR><LF> "TMB8A","TMB7A","TMB6A","TMB5A","TMB4A","TMB3A","TMB2A","TMB1A","yyyy" <CR><LF> "RMB8B","RMB7B","RMB6B","RMB5B","RMB4B","RMB3B","RMB2B","RMB1B","yyyy" <CR><LF> "TMB8B","TMB7B","TMB6B","TMB5B","TMB4B","TMB3B","TMB2B","TMB1B","yyyy" <CR><LF> "LBOKB","CBADB","RBADB","ROKB","LBOKA","CBADA","RBADA","ROKA","yyyy" <CR><LF> "PWRA1","PWRB1","PWRC1","PWRA2","PWRB2","PWRC2","INTC","INT3P","yyyy"<CR><LF> "PWRA3","PWRB3","PWRC3","PWRA4","PWRB4","PWRC4","INTA","INTB","yyyy"<CR><LF> "SAGA","SAGB","SAGC","SAG3P","SWA","SWB","SWC","SW3P","yyyy"<CR><LF> "SAGAB","SAGBC","SAGCA","SWAB","SWBC","SWCA","*","*","yyyy"<CR><LF> "3PWR1","3PWR2","3PWR3","3PWR4","INTAB","INTBC","INTCA","DELTA","yyyy"<CR><LF> "27AB2","27BC2","27CA2","59AB2","59BC2","59CA2","59Q2","3V0","yyyy"<CR><LF> "V1GOOD","*","*","V0GAIN","INMET","ICMET","IBMET","IAMET","yyyy"<CR><LF> "GNDSW","50NF","50NR","32NE","F32N","R32N","32NF","32NR","yyyy"<CR><LF> Date Code 20020426 Configuration, Fast Meter, and Fast Operate Commands D-11 SEL-351-5, -6, -7 Instruction Manual...

  • Page 622: Bna Message

    “xxxx”,”xxxx”,”xxxx”, <CR><LF><ETX> where: xxxx is a string from the settings in SER (SER1, SER2 and SER3) yyyy is the 4-byte ASCII representation of the checksum. D-12 Configuration, Fast Meter, and Fast Operate Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 623: Introduction

    The naming convention for the compressed ASCII commands is a 'C' preceding the typical command. For example, CSTATUS (abbreviated to CST) is the compressed STATUS command. ll is the minimum access level at which the command is available. Date Code 20020426 Compressed ASCII Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 624 Relay models 0351x0, 0351x1 and 0351xY, Firmware Versions 5, 6, and 7, send: <STX> "CAS",5,"yyyy"<CR><LF> "CST",1,"yyyy"<CR><LF> "1H","FID","yyyy"<CR><LF> "1D","45S","yyyy"<CR><LF> "7H","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","yyyy"<CR><LF> "1D","I","I","I","I","I","I","I","yyyy"<CR><LF> "23H","IA","IB","IC","IN","VA","VB","VC","VS","MOF","+5V_PS","+5V_REG", "-5V_REG","+12V_PS","-12V_PS","+15V_PS", "-15V_PS","TEMP","RAM","ROM","A/D","CR_RAM", "EEPROM","IO_BRD","yyyy"<CR><LF> "1D","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S","9S", "9S","9S","9S","9S","9S","9S","9S","9S","yyyy"<CR><LF> "CHI",1,"yyyy"<CR><LF> "1H","FID","yyyy"<CR><LF> "1D","45S","yyyy"<CR><LF> "15H","REC_NUM","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC", "EVENT","LOCATION","CURR","FREQ","GROUP","SHOT","TARGETS", "yyyy"<CR><LF> Compressed ASCII Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 625 4-byte hex ASCII representation of the checksum. See the CEVENT command for definition of the “Names of elements in the relay word Rows 2 - 62 separated by spaces” field. Date Code 20020426 Compressed ASCII Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 626 4-byte hex ASCII representation of the checksum. If the history buffer is empty, the relay responds: <STX>"No Data Available","yyyy"<CR><LF><ETX> Compressed ASCII Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 627 LOCATION is the fault location. SHOT is the recloser shot counter. TARGETS are the front-panel tripping targets. IA, IB, IC, IN, IG, 3I2 is the fault current. TRIG refers to the trigger record. Date Code 20020426 Compressed ASCII Commands SEL-351-5, -6, -7 Instruction Manual...
  • Page 628 DELTA 27AB2 27BC2 27CA2 59AB2 59BC2 59CA2 59Q2 3V0 V1GOOD * * V0GAIN INMET ICMET IBMET IAMET GNDSW 50NF 50NR 32NE F32N R32N 32NF 32NR * F32W R32W F32C R32C NSA NSB NSC " Compressed ASCII Commands Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 629 Relay Word are “10”. In binary, this evaluates to 00010000. Mapping the labels to the bits yields: Labels 50A1 50B1 50C1 50A2 50B2 50C2 50A3 50B3 Bits In this example, the 50A2 element is asserted (logical 1); all others are deasserted (logical 0). Date Code 20020426 Compressed ASCII Commands SEL-351-5, -6, -7 Instruction Manual...

  • Page 631: Appendix F: Setting Negative-Sequence Overcurrent

    Refer to Figure 3.20 for more information on negative-sequence time- overcurrent element 51QT. Date Code 20020426 Setting Negative-Sequence Overcurrent Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 632: Coordination Example

    The coordination example is a generic example that can be used with any relay containing negative-sequence overcurrent elements that operate on 3I magnitude negative-sequence current. The SEL-351 Relay can be inserted as the feeder relay in this example. Note that the overcurrent Setting Negative-Sequence Overcurrent Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 633 51QF, respectively) must coordinate with the phase overcurrent element of the line recloser (51R). Figure F.2: Distribution Feeder Protective Devices = Maximum load current through feeder relay = 450 A Date Code 20020426 Setting Negative-Sequence Overcurrent Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 634: Apply The Feeder Relay Negative-Sequence Overcurrent Element

    Applying negative-sequence overcurrent element coordination Guidelines 1 to 3 results in the feeder relay “equivalent” phase overcurrent element (51EP) in Figure F.4. Curve for 51F is shown for comparison only. Setting Negative-Sequence Overcurrent Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

  • Page 635: Convert "Equivalent" Phase Overcurrent Element Settings To Negative

    Guideline 4. The time dial (lever) and curve type of the element remain the same (if the element is a definite-time element, the time delay remains the same). Date Code 20020426 Setting Negative-Sequence Overcurrent Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 636: Negative-Sequence Overcurrent Element Applied At A Distribution Bus

    It is coordinated with the distribution feeder phase or negative-sequence overcurrent elements and provides more-sensitive and faster phase-to-phase fault backup. Setting Negative-Sequence Overcurrent Elements Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 637 This conference paper gives many good application examples for negative-sequence overcurrent elements. The focus is on the transmission system, where negative-sequence overcurrent elements provide better sensitivity than zero-sequence overcurrent elements in detecting some single-line-to-ground faults. Date Code 20020426 Setting Negative-Sequence Overcurrent Elements SEL-351-5, -6, -7 Instruction Manual...

  • Page 639: Appendix G: Setting Sel Ogic Control Equations

    If the maximum phase current is above the level of the phase time-overcurrent pickup setting 51PP, phase time-overcurrent element 51PT is either timing on its curve or is already timed out. ® Date Code 20020426 Setting SEL Control Equations OGIC SEL-351-5, -6, -7 Instruction Manual...

  • Page 640: Relay Word Bit Application Examples-Phase Time-Overcurrent Element

    Relay Word bit (e.g., 51PR) that asserts for the reset state of the element. Relay Word bits are used in SEL control equations, which are explained in the following OGIC subsection. ® Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 641 ANDed together. The above example is from Figure 7.27 in Section 7: Inputs, Outputs, Timers, and Other Control Logic. Parentheses cannot be “nested” (parentheses within parentheses) in a SEL control equation setting. OGIC ® Date Code 20020426 Setting SEL Control Equations OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 642 OGIC ULTR = !(51P + 51G) Refer also to Trip Logic in Section 5: Trip and Target Logic. ® Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 643 Suppose a ground fault occurs and a breaker failure condition finally results. Figure G.1 demonstrates the action of the rising edge operator / on the individual elements in setting ER. ® Date Code 20020426 Setting SEL Control Equations OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 644 The falling edge operator \ in front of a Relay Word bit sees this logical 1 to logical 0 transition as a “falling edge” and asserts to logical 1 for one processing interval. ® Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 645 51GT residual ground time-overcurrent element timed out 50P1 phase instantaneous overcurrent element asserted reclosing relay shot counter at shot = 0 ® Date Code 20020426 Setting SEL Control Equations OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 646 To assert output contact OUT101 to trip a circuit breaker, make the following SEL control OGIC equation output contact setting (see Output Contacts in Section 7: Inputs, Outputs, Timers, and Other Control Logic): OUT101 = TRIP ® Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 647 If the directional control enable setting E32 = N (and 51PTC = 1), then time-overcurrent element 51PT is enabled (assuming pickup setting 51PP is made) and nondirectional. ® Date Code 20020426 Setting SEL Control Equations OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 648 Thus, the relay processing interval is 1/4-cycle. Once a Relay Word bit is asserted, it retains the state (logical 1 or logical 0) until it is updated again in the next processing interval. ® G-10 Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 649 27CA2, 3P27, 3P59, 59S1, 27S, 59S2, 59V1, 59Q, 59Q2, 59N1, 59N2 Synchronism Check Elements and Vs (BSYNCH), 59VS, 59VP, 59VA, SF, 25A1, Section 3 (BSYNCH) 25A2, SSLOW, SFAST ® Date Code 20020426 Setting SEL Control Equations G-11 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 650 {(SVn), SVn, SVnT, where n = 1 to 16} Section 7 OGIC Variables/Timers (SV1–SV16) OUT101–OUT107 OUT101–OUT107 Section 7 OUT201–OUT212 (extra I/O board) OUT201–OUT212 (extra I/O board) Display Points (DP1–DP16) (DP1–DP16) Section 7 ® G-12 Setting SEL Control Equations Date Code 20020426 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 651 Section 10 Demand Ammeters QDEM, GDEM, NDEM, PDEM Section 8 element status RBADA, CBADA, RBADB, CBADB Appendix I IRRORED Voltage input configuration DELTA, 3V0 Section 9 ® Date Code 20020426 Setting SEL Control Equations G-13 OGIC SEL-351-5, -6, -7 Instruction Manual...
  • Page 653 Seconds until Oldest Event to Tx on (0.0–60) UTIMEO Seconds to Event Message Confirm Time-out (1–50) The response to the VER command will indicate “DNP” under Extended Relay Features if the relay has DNP. Date Code 20020426 Distributed Network Protocol (DNP) 3.00 SEL-351-5, -6, -7 Instruction Manual...
  • Page 654 The timing is the same as above, but PREDLY functions as if it were set to 0, and RTS is not actually deasserted after the PSTDLY time delay expires. Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 655 Based on the capabilities of the system, it is necessary to determine which method is desired to retrieve data on the DNP connection. The following table summarizes the main options, listed from least to most efficient, and corresponding key related settings are indicated. Date Code 20020426 Distributed Network Protocol (DNP) 3.00 SEL-351-5, -6, -7 Instruction Manual...
  • Page 656 Set UNSOL = Y, Set NUMEVE and AGEEVE according to how often messages are desired to be sent. Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 657 Object Group Request Function Codes Response Function Codes Object Variation Request Qualifiers Response Qualifiers Object Name (optional) Vendor Name: Schweitzer Engineering Laboratories, Inc. Device Name: SEL-351 Highest DNP Level Supported: Device Function: ¨ Master þ Slave For Requests Level 2...
  • Page 658 þ Binary Input Change With Time ¨ Only non-time-tagged ¨ Binary Input Change With Relative ¨ Configurable to send both, one or the Time ¨ Configurable (attach explanation) other (attach explanation) Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 659 Binary Input Change with Relative Time 6,7,8 17,28 Binary Output—All Variations 0,1,6,7,8 Binary Output Binary Output Status 0,1,6,7,8 Control Block—All Variations echo of Control Relay Output Block 3,4,5,6 17,28 request Date Code 20020426 Distributed Network Protocol (DNP) 3.00 SEL-351-5, -6, -7 Instruction Manual...
  • Page 660 32-Bit Delta Counter Change Event with Time 16-Bit Delta Counter Change Event with Time Frozen Counter Event—All Variations 32-Bit Frozen Counter Event without Time 16-Bit Frozen Counter Event without Time Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 661 32-Bit Analog Output Block 3,4,5,6 17,28 request echo of 16-Bit Analog Output Block 3,4,5,6 17,28 request Time and Date—All Variations Time and Date index = 0 quantity=1 Date Code 20020426 Distributed Network Protocol (DNP) 3.00 SEL-351-5, -6, -7 Instruction Manual...
  • Page 662 Large Packed Binary-Coded Decimal No object 13,14,23 Each version of the SEL-351 has a slightly different data map. The following is the default object map supported by the SEL-351. H-10 Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 663 30,32 04,05 IC magnitude and angle. 30,32 06,07 IN magnitude and angle. 30,32 08,09 VA magnitude (kV) and angle. 30,32 10,11 VB magnitude (kV) and angle. Date Code 20020426 Distributed Network Protocol (DNP) 3.00 H-11 SEL-351-5, -6, -7 Instruction Manual...
  • Page 664 A-, B-, C-, and 3-phase peak demand MVAR out. 30,32 102–104 Breaker contact wear percentage (A, B, C). 30,322 Fault type (see table for definition). 30,322 Fault location. 30,322 107` Fault current. H-12 Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 665 122 in extended mode). Analog inputs 28 – – 57, 64 79, 86 104, and 106 are further scaled according to the DECPLM setting (e.g., if – – – Date Code 20020426 Distributed Network Protocol (DNP) 3.00 H-13 SEL-351-5, -6, -7 Instruction Manual...
  • Page 666 The Trip/Close bits take precedence over the control field. The control field is interpreted as follows: H-14 Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 667 With the LIFO method the relay event summaries will be collected in reverse chronological order, unless binary input point 1025 is set, which the master can use to identify when a newer relay event summary is available. Date Code 20020426 Distributed Network Protocol (DNP) 3.00 H-15 SEL-351-5, -6, -7 Instruction Manual...
  • Page 668 (i.e., the relay uses the default analog or binary map). For example, the first example remap could be produced with the following commands: H-16 Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 669 35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR> 103<CR> Save Changes (Y/N)? Y<CR> ==>DNP B Enter the new DNP Binary map <CR> Save Changes (Y/N)? Y<CR> ==> Date Code 20020426 Distributed Network Protocol (DNP) 3.00 H-17 SEL-351-5, -6, -7 Instruction Manual...
  • Page 670 REPADR Number of Events to Transmit on (1–200) NUMEVE Seconds until Oldest Event to Tx on (0.0–60.0) AGEEVE Seconds to Event Message Confirm Time-out (1–50) UTIMEO H-18 Distributed Network Protocol (DNP) 3.00 Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 671 REPADR Number of Events to Transmit on (1–200) NUMEVE Seconds until Oldest Event to Tx on (0.0–60.0) AGEEVE Seconds to Event Message Confirm Time-out (1–50) UTIMEO Date Code 20020426 Distributed Network Protocol (DNP) 3.00 H-19 SEL-351-5, -6, -7 Instruction Manual...
  • Page 673 • Parity, framing, or overrun errors. • Receive data redundancy error. • Receive message identification error. • No message received in the time three messages have been sent. Date Code 20020426 MIRRORED BITS™ (in Firmware Versions 6 and 7) SEL-351-5, -6, -7 Instruction Manual...
  • Page 674 If loop back is not enabled, the node deasserts ROKx and transmits the attention message with its TX_ID included. If loop back is enabled, the relay transmits data. MIRRORED BITS™ (in Firmware Versions 6 and 7) Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 675 When channel unavailability exceeds a user-settable threshold, the relay will assert a user accessible flag, hereafter called CBADx. Note: The user will typically combine CBADx with other alarm conditions using SEL OGIC control equations. Date Code 20020426 MIRRORED BITS™ (in Firmware Versions 6 and 7) SEL-351-5, -6, -7 Instruction Manual...
  • Page 676 Use the MBT option if you are using a Pulsar MBT 9600 baud modem. With this option set, the relay will transmit a message every 1/2 power system cycle and the relay will deassert the RTS MIRRORED BITS™ (in Firmware Versions 6 and 7) Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 677 The setting is a mask of 1s, 0s and/or Xs, for RMB1A-RMB8A, where X represents the most recently received valid value. Date Code 20020426 MIRRORED BITS™ (in Firmware Versions 6 and 7) SEL-351-5, -6, -7 Instruction Manual...
  • Page 678 Supervise the transfer of received data (or default data) to RMB1A RMB8A with the M – IRRORED pickup and dropout security counters. Set the pickup and dropout counters individually for each bit. MIRRORED BITS™ (in Firmware Versions 6 and 7) Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 679 RMB7PU = IRRORED RMB_Dropout Debounce msgs (1–8) RMB7DO = IRRORED RMB_Pickup Debounce msgs (1–8) RMB8PU = IRRORED RMB_Dropout Debounce msgs (1–8) RMB8DO = IRRORED Date Code 20020426 MIRRORED BITS™ (in Firmware Versions 6 and 7) SEL-351-5, -6, -7 Instruction Manual...
  • Page 681 The relay will wait approximately 100 ms to 500 ms to receive an acknowledge message, at which time the relay will resend the same unsolicited Fast SER message with the same response number. Date Code 20020426 SEL-351 Fast SER Protocol SEL-351-5, -6, -7 Instruction Manual...
  • Page 682 If the SER triggers are disabled (SER1, SER2, and SER3 are all set to NA), the unsolicited Fast SER messages are still enabled, but the only SER records generated are SEL-351 Fast SER Protocol Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 683 Unsolicited Data Transfer” and the “Disable Unsolicited Data Transfer” messages to indicate which type of unsolicited data should be enabled or disabled. The message format for function code 18 is shown below. Date Code 20020426 SEL-351 Fast SER Protocol SEL-351-5, -6, -7 Instruction Manual...
  • Page 684 Four bytes reserved for future use as a return routing address. dddd Two-byte day of year (1 366) of overflow message generation – yyyy Two-byte, four-digit year (e.g., 1999 or 07CF hex) of overflow message generation. SEL-351 Fast SER Protocol Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 685 A5 46 0E 00 00 00 00 00 00 82 00 XX cc cc (XX is as same as the response number in the “Disable Unsolicited Fast SER Data Transfer” message to which it responds.) Date Code 20020426 SEL-351 Fast SER Protocol SEL-351-5, -6, -7 Instruction Manual...
  • Page 686 The relay always requests acknowledgment in unsolicited Fast SER messages (LSB of the status byte is set). Unsolicited Fast SER messages can be enabled on multiple ports simultaneously. SEL-351 Fast SER Protocol Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 687 (CB) simulator. The CB simulator is useful for testing and evaluation. Note 1: Like all SEL relay products, the SEL-351-5, -6, -7 Relay can also be set and operated by a simple ASCII terminal.
  • Page 688 1. Double-click the SEL-5030 software icon if you have a desktop ERATOR shortcut. 2. Choose “Programs | SEL Applications” and select the SEL-5030 ERATOR software icon to start the program. ® SEL-5030 Date Code 20020426 ERATOR SEL-351-5, -6, -7 Instruction Manual...
  • Page 689 EVE n Ly Show first y cycles of event report n (y = 1 to global setting LER). EVE n V Show event report n with variable scaling for analog values. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 690 Show latest n rows in SSI report (n = 1 to several thousand, where 1 is the most recent entry). Show rows m through n in SSI report (m = 1 to several thousand). Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 691 (t = 1–5000, default is 5). p DATA Set M port p to loopback. DATA allows the received M elements IRRORED IRRORED to change during the loopback test. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 692 Exits setting editing session, then prompts user to save settings. Ctrl - X Aborts setting editing session without saving changes. Available in firmware versions 6 and 7. Available in firmware version 7. Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 693 EVE n Ly Show first y cycles of event report n (y = 1 to global setting LER). EVE n V Show event report n with variable scaling for analog values. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 694 Show latest n rows in SSI report (n = 1 to several thousand, where 1 is the most recent entry). Show rows m through n in SSI report (m = 1 to several thousand). Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...
  • Page 695 (t = 1–5000, default is 5). p DATA Set M port p to loopback. DATA allows the received M elements IRRORED IRRORED to change during the loopback test. Date Code 20020426 Command Summary SEL-351-5, -6, -7 Instruction Manual...
  • Page 696 Exits setting editing session, then prompts user to save settings. Ctrl - X Aborts setting editing session without saving changes. Available in firmware versions 6 and 7. Available in firmware version 7. Command Summary Date Code 20020426 SEL-351-5, -6, -7 Instruction Manual...

This manual is also suitable for:

Sel-351-7Sel-351-6

Table of Contents