Download  Print this page

Distance - GE L60 Instruction Manual

Line phase comparison system, ur series.
Hide thumbs
   
1
2
Table of Contents
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
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722

Advertisement

5.5 GROUPED ELEMENTS
a) MAIN MENU

PATH: SETTINGS
GROUPED ELEMENTS
 DISTANCE
5
Four common settings are available for distance protection. The
tance functions. The mho distance functions use a dynamic characteristic: the positive-sequence voltage – either memo-
rized or actual – is used as a polarizing signal. The memory voltage is also used by the built-in directional supervising
functions applied for both the mho and quad characteristics.
The
MEMORY DURATION
distance calculations. After this interval expires, the relay checks the magnitude of the actual positive-sequence voltage. If
it is higher than 10% of the nominal, the actual voltage is used, if lower – the memory voltage continues to be used.
The memory is established when the positive-sequence voltage stays above 80% of its nominal value for five power system
cycles. For this reason it is important to ensure that the nominal secondary voltage of the VT is entered correctly under the

SETTINGS
SYSTEM SETUP
Set
MEMORY DURATION
mum fault clearing time (breaker fail time) in the substation should be considered. On the other hand, the
cannot be too long as the power system may experience power swing conditions rotating the voltage and current
TION
phasors slowly while the memory voltage is static, as frozen at the beginning of the fault. Keeping the memory in effect for
too long may eventually lead to incorrect operation of the distance functions.
The distance zones can be forced to become self-polarized through the
dition (FlexLogic™ operand) can be configured to force self-polarization. When the selected operand is asserted (logic 1),
the distance functions become self-polarized regardless of other memory voltage logic conditions. When the selected oper-
and is de-asserted (logic 0), the distance functions follow other conditions of the memory voltage logic as shown below.
The distance zones can be forced to become memory-polarized through the
condition (any FlexLogic™ operand) can be configured to force memory polarization. When the selected operand is
asserted (logic 1), the distance functions become memory-polarized regardless of the positive-sequence voltage magni-
tude at this time. When the selected operand is de-asserted (logic 0), the distance functions follow other conditions of the
memory voltage logic.
5-134
SETTING GROUP 1(6)

DISTANCE

SOURCE: SRC 1
MEMORY
MESSAGE
DURATION: 10 cycles
FORCE SELF-POLAR:
MESSAGE
Off
FORCE MEM-POLAR:
MESSAGE
Off
 PHASE DISTANCE Z1
MESSAGE
 PHASE DISTANCE Z2
MESSAGE
 PHASE DISTANCE Z3
MESSAGE
 GROUND DISTANCE Z1
MESSAGE
 GROUND DISTANCE Z2
MESSAGE
 GROUND DISTANCE Z3
MESSAGE
setting specifies the length of time a memorized positive-sequence voltage should be used in the

AC INPUTS
VOLTAGE BANK
long enough to ensure stability on close-in reverse three-phase faults. For this purpose, the maxi-
L60 Line Phase Comparison System

DISTANCE
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 5 to 25 cycles in steps of 1
Range: FlexLogic™ operand
Range: FlexLogic™ operand
See page 5–135.
See page 5–135.
See page 5–135.
See page 5–144.
See page 5–144.
See page 5–144.
identifies the signal source for all dis-
DISTANCE SOURCE
menu.
setting. Any user-selected con-
FORCE SELF-POLAR
FORCE MEM-POLAR
5 SETTINGS
5.5.5 DISTANCE
MEMORY DURA-
setting. Any user-selected
GE Multilin

Advertisement

Table of Contents

   Also See for GE L60

   Related Manuals for GE L60

Comments to this Manuals

Symbols: 0
Latest comments: