Download  Print this page

GE L60 Instruction Manual Page 397

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 SETTINGS
There are three initiate programs: single pole initiate, three pole initiate and three pole, time delay initiate. Any of these
reclose initiate signals will start the reclose cycle and set the reclose-in-progress (
operand is sealed-in until the Lockout or Reset signal appears.
The three-pole initiate and three-pole time delay initiate signals are latched until the
Reset signal appears.
AR PAUSE:
The pause input offers the possibility of freezing the autoreclose cycle until the pause signal disappears. This may be done
when a trip occurs and simultaneously or previously, some conditions are detected such as out-of step or loss of guard fre-
quency, or a remote transfer trip signal is received. The pause signal blocks all three dead timers. When the 'pause' signal
disappears the autoreclose cycle is resumed by initiating
This feature can be also used when a transformer is tapped from the protected line and a reclose is not desirable until the
transformer is removed from the line. In this case, the reclose scheme is 'paused' until the transformer is disconnected. The
input will force a three-pole trip through the
AR PAUSE
EVOLVING FAULTS:
1.25 cycles after the single pole dead time has been initiated, the
when the scheme is reset or goes to Lockout. This will ensure that when a fault on one phase evolves to include another
phase during the single pole dead time of the auto-recloser the scheme will force a 3 pole trip and reclose.
RECLOSING SCHEME OPERATION FOR ONE BREAKER:
Permanent Fault: Consider Mode 1, which calls for 1-Pole or 3-Pole Time Delay 1 for the first reclosure and 3-Pole
Time Delay 2 for the second reclosure, and assume a permanent fault on the line. Also assume the scheme is in the
Reset state. For the first single-phase fault the
the
timer will be started. If the
AR 3-P DEAD TIME 1
the first shot.
If
is set to "1", upon the first reclose the shot counter is set to 1. Upon reclosing, the fault is again
AR MAX NO OF SHOTS
detected by protection and reclose is initiated. The breaker is tripped three-pole through the
and that will set the
AR FORCE 3P
mitted the scheme is sent to the Lockout state.
If
is set to "2", upon the first reclose the shot counter is set to 1. Upon reclosing, the fault is again
AR MAX NO OF SHOTS
detected by protection and reclose is initiated. The breaker is tripped three-pole through the
and that will set the
AR FORCE 3P
fault is again detected by protection, the breaker is tripped three-pole, and reclose is initiated again. Because the shot
counter has reached the maximum number of shots permitted the scheme is sent to the lockout state.
Transient Fault: When a reclose output signal is sent to close the breaker the reset timer is started. If the reclosure
sequence is successful (there is no initiating signal and the breaker is closed) the reset timer will time out returning the
scheme to the reset state with the shot counter set to "0" making it ready for a new reclose cycle.
RECLOSING SCHEME OPERATION FOR TWO BREAKERS:
Permanent Fault: The general method of operation is the same as that outlined for the one breaker applications
except for the following description, which assumes
The signal output from the dead time timers passes through the breaker selection logic to initiate reclosing of Breaker
1. The Close Breaker 1 signal will initiate the Transfer Timer. After the reclose of the first breaker the fault is again
detected by the protection, the breaker is tripped three pole and the autoreclose scheme is initiated. The Initiate signal
will stop the transfer timer. After the 3-P dead time times out the Close Breaker 1 signal will close first breaker again
and will start the transfer timer. Since the fault is permanent the protection will trip again initiating the autoreclose
scheme that will be sent to Lockout by the
Transient Fault: When the first reclose output signal is sent to close Breaker 1, the reset timer is started. The close
Breaker 1 signal initiates the transfer timer that times out and sends the close signal to the second breaker. If the reclo-
sure sequence is successful (both breakers closed and there is no initiating signal) the reset timer will time out, return-
ing the scheme to the reset state with the shot counter set to 0. The scheme will be ready for a new reclose cycle.
GE Multilin
AR 3-P DEAD TIME 2
3-P DEADTIME 2
AR FORCE 3P TRIP
AR 1-P DEAD TIME
AR 3P TD INIT
operand. Because the shot counter has reached the maximum number of shots per-
operand. After the second reclose the shot counter is set to 2. Upon reclosing, the
AR BKR SEQUENCE
SHOT COUNT = MAX
L60 Line Phase Comparison System
5.6 CONTROL ELEMENTS
) operand. The reclose-in-progress
AR RIP
CLOSE BKR1 OR BKR2
.
path.
operand is set and it will be reset only
timer will be started, while for the first multi-phase fault
signal is high, the
AR 3-P DEAD TIME 2
AR SHOT COUNT >0
AR SHOT COUNT >0
is "1-2" (reclose Breaker 1 before Breaker 2)
signal.
or Lockout or
will be started for
5
oper-
oper-
5-259

Advertisement

Table of Contents

   Also See for GE L60

   Related Manuals for GE L60

Comments to this Manuals

Symbols: 0
Latest comments: