GE 869 - Page 6

IV 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Output Relay 2 (F4) programmed as Close..............................................................................4 - 102
Auxiliary Output Relays ....................................................................................................................4 - 104
Output Relay 3 (F7) Start Inhibit....................................................................................................4 - 106
Virtual Outputs ......................................................................................................................................4 - 106
Analog Outputs.....................................................................................................................................4 - 107
Protection....................................................................................................................................... 4 - 108
Motor Elements.....................................................................................................................................4 - 110
Percent Differential.............................................................................................................................4 - 110
Thermal Model (49)..............................................................................................................................4 - 117
Current Unbalance (46) .....................................................................................................................4 - 138
Mechanical Jam (50LR) .....................................................................................................................4 - 143
Undercurrent (37).................................................................................................................................4 - 146
Loss of Excitation (40).........................................................................................................................4 - 149
Overload Alarm.....................................................................................................................................4 - 155
Short Circuit............................................................................................................................................4 - 157
Ground Fault (50SG)............................................................................................................................4 - 160
Acceleration Time................................................................................................................................4 - 164
Underpower (37P) ................................................................................................................................4 - 167
2-Speed Motor.......................................................................................................................................4 - 170
2-Speed Thermal Model....................................................................................................................4 - 170
2-Speed Acceleration.........................................................................................................................4 - 171
2-Speed Undercurrent.......................................................................................................................4 - 174
Current Elements .................................................................................................................................4 - 176
Inverse Time Overcurrent Curves.................................................................................................4 - 176
Percent of Load-To-Trip....................................................................................................................4 - 183
Phase Time Overcurrent Protection (51P).................................................................................4 - 184
Phase Instantaneous Overcurrent Protection (50P) ............................................................4 - 187
Phase Directional Overcurrent Protection (67P)....................................................................4 - 189
Neutral Time Overcurrent Protection (51N).............................................................................4 - 192
Neutral Instantaneous Overcurrent Protection (50N).........................................................4 - 195
Neutral Directional Overcurrent Protection (67N) ................................................................4 - 198
Ground Time Overcurrent Protection (51G).............................................................................4 - 203
Ground Instantaneous Overcurrent Protection (50G).........................................................4 - 205
Negative Sequence Instantaneous Overcurrent Protection (50_2)..............................4 - 207
Voltage Elements .................................................................................................................................4 - 210
Phase Reversal (47) .............................................................................................................................4 - 211
Undervoltage Curves .........................................................................................................................4 - 213
Phase Undervoltage Protection (27P).........................................................................................4 - 214
Phase Overvoltage Protection (59P)............................................................................................4 - 217
Auxiliary Undervoltage (27X) ..........................................................................................................4 - 220
Auxiliary Overvoltage Protection (59X) ......................................................................................4 - 223
Neutral Overvoltage Protection (59N) ........................................................................................4 - 226
Negative Sequence Overvoltage Protection (59_2).............................................................4 - 229
Volts per Hertz (24) ..............................................................................................................................4 - 231
Impedance Elements .........................................................................................................................4 - 236
Out-of-step (78).....................................................................................................................................4 - 238
Power Elements....................................................................................................................................4 - 243
Directional Power (32)........................................................................................................................4 - 244
Reactive Power (40Q) .........................................................................................................................4 - 249
Frequency Elements...........................................................................................................................4 - 252
Underfrequency (81U) .......................................................................................................................4 - 252
Overfrequency (81O) ..........................................................................................................................4 - 255
Frequency Rate of Change (81R)..................................................................................................4 - 258
Monitoring...................................................................................................................................... 4 - 262
Breaker......................................................................................................................................................4 - 262
Trip and Close Circuit Monitoring .................................................................................................4 - 262
Breaker Arcing Current......................................................................................................................4 - 270
Breaker Health ......................................................................................................................................4 - 273