IV 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
FlexCurves..................................................................................................................................................5 - 76
Inputs...................................................................................................................................................5 - 84
Contact Inputs..........................................................................................................................................5 - 85
Virtual Inputs.............................................................................................................................................5 - 88
Analog Inputs............................................................................................................................................5 - 90
Remote Inputs ..........................................................................................................................................5 - 94
Outputs...............................................................................................................................................5 - 95
Output Relays...........................................................................................................................................5 - 95
Output Relay 1 (F1) Trip........................................................................................................................5 - 98
Output Relay 2 (F4) programmed as Close..............................................................................5 - 100
Auxiliary Output Relays ....................................................................................................................5 - 102
Critical Failure Relay #8....................................................................................................................5 - 103
Virtual Outputs ......................................................................................................................................5 - 104
Analog Outputs.....................................................................................................................................5 - 105
6.PROTECTION
SETPOINTS
Current Elements..............................................................................................................................6 - 3
Inverse Time Overcurrent Curves...................................................................................................... 6 - 4
Percent of Load-To-Trip.......................................................................................................................6 - 11
Phase Time Overcurrent Protection (51P)....................................................................................6 - 11
Phase Instantaneous Overcurrent Protection (50P) ...............................................................6 - 15
Phase Directional Overcurrent Protection (67P).......................................................................6 - 17
Neutral Time Overcurrent Protection (51N)................................................................................6 - 20
Neutral Instantaneous Overcurrent Protection (50N)............................................................6 - 23
Neutral Directional Overcurrent Protection (67N) ...................................................................6 - 26
Ground Time Overcurrent Protection (51G) ................................................................................6 - 31
Ground Instantaneous Overcurrent Protection (50G)............................................................6 - 34
Ground Directional Overcurrent Protection (67G) ...................................................................6 - 36
Sensitive Ground Time Overcurrent Protection (51SG)..........................................................6 - 41
Sensitive Ground Instantaneous Overcurrent Protection (50SG) .....................................6 - 44
Sensitive Ground Directional Overcurrent Protection (67SG).............................................6 - 47
Restricted Ground Fault (87G)...........................................................................................................6 - 52
Switch on to Fault (SOTF).....................................................................................................................6 - 57
Negative Sequence Time Overcurrent Protection (51_2).....................................................6 - 60
Negative Sequence Instantaneous Overcurrent Protection (50_2).................................6 - 63
Negative Sequence Directional Overcurrent Protection (67_2) ........................................6 - 66
Broken Conductor...................................................................................................................................6 - 70
Load Encroachment ..............................................................................................................................6 - 73
Undercurrent (37)....................................................................................................................................6 - 76
Thermal Overload (49)...........................................................................................................................6 - 79
Voltage Elements...........................................................................................................................6 - 83
Undervoltage Curves.............................................................................................................................6 - 83
Phase Undervoltage Protection (27P)............................................................................................6 - 85
Timed Undervoltage Protection (27T)............................................................................................6 - 88
UV Reactive Power (27Q) .....................................................................................................................6 - 97
Auxiliary Undervoltage (27X) ..........................................................................................................6 - 104
Phase Overvoltage Protection (59P)............................................................................................6 - 106
Auxiliary Overvoltage Protection (59X) ......................................................................................6 - 109
Neutral Overvoltage Protection (59N) ........................................................................................6 - 112
Negative Sequence Overvoltage Protection (59_2).............................................................6 - 115
Admittance .................................................................................................................................... 6 - 118
Neutral Admittance (21YN)..............................................................................................................6 - 118
Power Elements........................................................................................................................... 6 - 126
Directional Power (32)........................................................................................................................6 - 127
Wattmetric Ground Fault (32N) .....................................................................................................6 - 132
Frequency Elements ................................................................................................................. 6 - 137
To Next Page
Loading...
