Download  Print this page

Signal Sources - GE L90 Instruction Manual

Line differential relay ur series.
Hide thumbs
   
1
2
3
4
Table of Contents
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

Advertisement

5 SETTINGS
The phase sequence of the power system is required to properly calculate sequence components and power parameters.
The
setting matches the power system phase sequence. Note that this setting informs the relay of the
PHASE ROTATION
actual system phase sequence, either ABC or ACB. CT and VT inputs on the relay, labeled as A, B, and C, must be con-
nected to system phases A, B, and C for correct operation.
The
FREQUENCY AND PHASE REFERENCE
phase angle reference. The AC signal used is prioritized based on the AC inputs that are configured for the signal source:
phase voltages takes precedence, followed by auxiliary voltage, then phase currents, and finally ground current.
For three phase selection, phase A is used for angle referencing (
phase signals is used for frequency metering and tracking (
ing fault, open pole, and VT and CT fail conditions.
The phase reference and frequency tracking AC signals are selected based upon the Source configuration, regardless of
whether or not a particular signal is actually applied to the relay.
Phase angle of the reference signal will always display zero degrees and all other phase angles will be relative to this sig-
nal. If the pre-selected reference signal is not measurable at a given time, the phase angles are not referenced.
The phase angle referencing is done via a phase locked loop, which can synchronize independent UR-series relays if they
have the same AC signal reference. These results in very precise correlation of time tagging in the event recorder between
different UR-series relays provided the relays have an IRIG-B connection.
FREQUENCY TRACKING
cial variable-frequency applications.
NOTE
The nominal system frequency should be selected as 50 Hz or 60 Hz only. The
setting, used as a reference for calculating all angles, must be identical for all terminals. Whenever the 87L function
NOTE
is "Enabled", the frequency tracking function is disabled, and frequency tracking is driven by the L90 algorithm (see
the Theory of Operation chapter). Whenever the 87L function is "Disabled", the frequency tracking mechanism
reverts to the UR-series mechanism which uses the
all other elements and functions.
!"
PATH: SETTINGS
SYSTEM SETUP
# SOURCE 1
#
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Four identical source menus are available. The "SRC 1" text can be replaced by with a user-defined name appropriate for
the associated source.
"F" and "L" represent the module slot position. The number directly following these letters represents either the first bank of
four channels (1, 2, 3, 4) called "1" or the second bank of four channels (5, 6, 7, 8) called "5" in a particular CT/VT module.
Refer to the Introduction to AC Sources section at the beginning of this chapter for additional details on this concept.
It is possible to select the sum of up to five (5) CTs. The first channel displayed is the CT to which all others will be referred.
For example, the selection "F1+F5" indicates the sum of each phase from channels "F1" and "F5", scaled to whichever CT
has the higher ratio. Selecting "None" hides the associated actual values.
GE Multilin
setting determines which signal source is used (and hence which AC signal) for
V
should only be set to "Disabled" in very unusual circumstances; consult the factory for spe-
FREQUENCY TRACKING
!"
!

SIGNAL SOURCES

SOURCE 1(4)
SOURCE 1 NAME:
SRC 1
SOURCE 1 PHASE CT:
None
SOURCE 1 GROUND CT:
None
SOURCE 1 PHASE VT:
None
SOURCE 1 AUX VT:
None
L90 Line Differential Relay
V
V
), while Clarke transformation of the
=
ANGLE REF
A
(
2V
V
V
=
FREQUENCY
A
B
C
FREQUENCY AND PHASE REFERENCE
setting to provide frequency tracking for
Range: up to 6 alphanumeric characters
Range: None, F1, F5, F1+F5,... up to a combination of
any 5 CTs. Only Phase CT inputs are displayed.
Range: None, F1, F5, F1+F5,... up to a combination of
any 5 CTs. Only Ground CT inputs are displayed.
Range: None, F1, F5, L1, L5
Only phase voltage inputs will be displayed.
Range: None, F1, F5, L1, L5
Only auxiliary voltage inputs will be displayed.
5.3 SYSTEM SETUP
) 3 ⁄
) for better performance dur-
5.3.3 SIGNAL SOURCES
5-37
5

Advertisement

Table of Contents

   Also See for GE L90

   Related Manuals for GE L90

Comments to this Manuals

Symbols: 0
Latest comments: