4
NVA100X-D - Manual - 02 - 2016
Loss of field - 40 ............................................................................................................................................................................................ 99
Negative sequence overcurrent for Generator protection - 46G........................................................................................................105
Negative sequence overcurrent for motor protection - 46M ............................................................................................................. 110
Phase rotation direction check - 47 .........................................................................................................................................................117
Phase overcurrent - 50/51 side H and side L ......................................................................................................................................... 129
Locked rotor- 50S/51LR(48)/14 .................................................................................................................................................................. 139
Voltage controlled/restraint overcurrent - 51V ......................................................................................................................................145
Residual overcurrent - 50N.1/51N.1, 50N.2/51N.2 or high impedance restricted earth fault - 87NHIZ.1, 87NHIZ.2 side 1,2 ....152
Residual overcurrent - 50N(Comp)/51N(Comp) side H or side L ........................................................................................................ 163
Minimum power factor - 55 ..................................................................................................................................................................... 173
Overvoltage - 59 ...........................................................................................................................................................................................177
Residual overvoltage - 59N ........................................................................................................................................................................181
Negative sequence overvoltage - 59V2 ...................................................................................................................................................185
Low impedance restricted ground fault- 64REF .....................................................................................................................................187
Ground directional overcurrent - 67N ......................................................................................................................................................192
Ground directional overcurrent with calculated residual current - 67N(Comp) ..............................................................................215
Overfrequency - 81O ...................................................................................................................................................................................227
Underfrequency - 81U ............................................................................................................................................................................... 229
Breaker failure - BF .....................................................................................................................................................................................246
Logical block - BLOCK1 ............................................................................................................................................................................. 248
Selective block -BLOCK2 .......................................................................................................................................................................... 250
Internal selective block -BLOCK4 .............................................................................................................................................................255
Logical block summary .............................................................................................................................................................................. 258
Remote tripping .......................................................................................................................................................................................... 260
Frequency tracking .....................................................................................................................................................................................261
Second Harmonic Restraint - 2ndh-REST ...............................................................................................................................................262
Cold Load Pickup - CLP ............................................................................................................................................................................. 263
Cold Load Pickup - CLP for motor-generator protection ......................................................................................................................264
Summary of elements where second harmonic restraint and Cold Load Pickup functions may be enabled .............................266
CT supervision - 74CT .................................................................................................................................................................................267
VT supervision - 74VT ................................................................................................................................................................................ 268
Circuit breaker supervision ...................................................................................................................................................................... 273
Virtual I/O ......................................................................................................................................................................................................275
Demand measures ..................................................................................................................................................................................... 279
Oscillography ............................................................................................................................................................................................. 279
5 MEASURES, LOGIC STATES AND COUNTERS
Measures ..................................................................................................................................................................................................... 280
Protection states .........................................................................................................................................................................................282
Delayed inputs .............................................................................................................................................................................................282
Internal states ..............................................................................................................................................................................................282
Relays ........................................................................................................................................................................................................... 283
Counters ....................................................................................................................................................................................................... 283
Self test ........................................................................................................................................................................................................ 283
Pilot wire diagnostic ...................................................................................................................................................................................284
Selective Block - BLOCK2 ..........................................................................................................................................................................284
Fault recording - SFR ..................................................................................................................................................................................284
Event recording - SER .................................................................................................................................................................................285
Oscillography - DFR ....................................................................................................................................................................................285
Reading variables (READ) ..........................................................................................................................................................................301
Setting modifying (SET) ..............................................................................................................................................................................302
COMMUNICATION ..................................................................................................................................................................................... 303
Circuit breaker commands ....................................................................................................................................................................... 303
Enable / block changes via keyboard - Password .................................................................................................................................304
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