GE L30 Instruction Manual page 6
Line current differential system
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Also See for L30:
- Instruction manual (698 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (630 pages)
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5.5.4
87L power system .......................................................................................................... 5-140
5.5.5
Breakers .............................................................................................................................. 5-147
5.5.6
Disconnect switch control .......................................................................................... 5-153
5.5.7
FlexCurves .......................................................................................................................... 5-158
5.5.8
Phasor Measurement Unit.......................................................................................... 5-165
5.6
FlexLogic.............................................................................................................. 5-185
5.6.1
FlexLogic operands........................................................................................................ 5-185
5.6.2
FlexLogic rules.................................................................................................................. 5-197
5.6.3
FlexLogic evaluation...................................................................................................... 5-197
5.6.4
FlexLogic example.......................................................................................................... 5-198
5.6.5
FlexLogic equation editor............................................................................................ 5-203
5.6.6
FlexLogic timers............................................................................................................... 5-203
5.6.7
FlexElements ..................................................................................................................... 5-203
5.6.8
Non-volatile latches....................................................................................................... 5-207
5.7
Grouped elements ............................................................................................. 5-208
5.7.1
Overview ............................................................................................................................. 5-208
5.7.2
Setting group 1................................................................................................................. 5-208
5.7.3
Line differential elements............................................................................................ 5-209
5.7.4
Phase current ................................................................................................................... 5-214
5.7.5
Neutral current................................................................................................................. 5-226
5.7.6
Ground current ................................................................................................................ 5-234
5.7.7
Negative sequence current........................................................................................ 5-237
5.7.8
Breaker failure (ANSI 50BF)......................................................................................... 5-239
5.7.9
Voltage elements ............................................................................................................ 5-249
5.7.10
Supervising elements.................................................................................................... 5-256
5.8
Control elements ............................................................................................... 5-259
5.8.1
Overview ............................................................................................................................. 5-259
5.8.2
Trip bus ................................................................................................................................ 5-259
5.8.3
Setting groups .................................................................................................................. 5-261
5.8.4
Selector switch................................................................................................................. 5-262
5.8.5
Underfrequency (ANSI 81U)........................................................................................ 5-269
5.8.6
Frequency rate of change (ANSI 81R).................................................................... 5-270
5.8.7
Synchrocheck (ANSI 25) ............................................................................................... 5-272
5.8.8
Autoreclose (ANSI 79) .................................................................................................... 5-278
5.8.9
Digital elements............................................................................................................... 5-284
5.8.10
Digital counters................................................................................................................ 5-287
5.8.11
Monitoring elements ..................................................................................................... 5-289
5.9
Inputs/outputs ................................................................................................... 5-304
5.9.1
Contact inputs .................................................................................................................. 5-304
5.9.2
Virtual inputs ..................................................................................................................... 5-306
5.9.3
Contact outputs............................................................................................................... 5-307
5.9.4
Virtual outputs.................................................................................................................. 5-310
5.9.5
Resetting ............................................................................................................................. 5-310
5.9.6
Direct inputs and outputs ........................................................................................... 5-311
5.10 Transducer inputs/outputs.............................................................................. 5-313
5.10.1
DCmA inputs...................................................................................................................... 5-313
5.10.2
RTD inputs .......................................................................................................................... 5-314
5.10.3
DCmA outputs .................................................................................................................. 5-315
5.11 Testing ................................................................................................................. 5-319
5.11.1
Test mode function ........................................................................................................ 5-319
5.11.2
Test mode forcing........................................................................................................... 5-319
5.11.3
Phasor Measurement Unit test values.................................................................. 5-320
5.11.4
Force contact inputs ..................................................................................................... 5-321
5.11.5
Force contact outputs .................................................................................................. 5-321
5.11.6
Channel tests .................................................................................................................... 5-322
L30 LINE CURRENT DIFFERENTIAL SYSTEM - INSTRUCTION MANUAL
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