GE 339

TOC–4 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Installation...................................................................................................................................6 - 22
Preset statistics.........................................................................................................................6 - 23
S2 System Setup ................................................................................................................6 - 24
Current sensing.........................................................................................................................6 - 24
Voltage sensing ........................................................................................................................ 6 - 26
Power system............................................................................................................................6 - 26
Motor.............................................................................................................................................. 6 - 27
Switching device ......................................................................................................................6 - 28
Contactor current supervision..........................................................................................6 - 28
FlexCurves ...................................................................................................................................6 - 30
VFD..................................................................................................................................................6 - 32
S3 Protection........................................................................................................................6 - 34
Motor Thermal Model.............................................................................................................6 - 34
Total Capacity Used register (TCU).................................................................................6 - 35
Start protection........................................................................................................................6 - 36
Thermal overload curves.....................................................................................................6 - 36
Flexcurves...................................................................................................................................6 - 44
Thermal protection setpoints............................................................................................6 - 45
Short circuit (50P) ..................................................................................................................... 6 - 49
Mechanical Jam (51R)............................................................................................................6 - 51
Undercurrent (37).....................................................................................................................6 - 53
Current unbalance (46)..........................................................................................................6 - 56
Load increase alarm (50L)....................................................................................................6 - 60
Ground fault (50G/SG)............................................................................................................6 - 61
Neutral instantaneous overcurrent (50N)..................................................................... 6 - 64
Time overcurrent curves.......................................................................................................6 - 66
Phase timed overcurrent (51P) ..........................................................................................6 - 70
Neutral timed overcurrent (51N).......................................................................................6 - 73
Phase undervoltage (27P) ....................................................................................................6 - 76
Phase overvoltage (59P) ....................................................................................................... 6 - 79
Negative sequence overvoltage (59_2) .........................................................................6 - 81
Positive sequence undervoltage (27_1).........................................................................6 - 83
Underfrequency (81U) ........................................................................................................... 6 - 86
Overfrequency (81O) ..............................................................................................................6 - 88
Underpower (37)....................................................................................................................... 6 - 90
Phase reversal (47) ..................................................................................................................6 - 93
Acceleration protection (48)................................................................................................6 - 94
RTD protection (38/49T) ........................................................................................................ 6 - 96
Two-speed motor ....................................................................................................................6 - 102
Two-speed motor setup ......................................................................................................6 - 103
High speed thermal protection ........................................................................................6 - 104
High speed short circuit settings.....................................................................................6 - 104
High speed acceleration......................................................................................................6 - 107
High speed undercurrent....................................................................................................6 - 107
Neutral directional overcurrent (67N).............................................................................6 - 110
Directional power (32)............................................................................................................6 - 114
S4 Controls............................................................................................................................6 - 118
Virtual inputs .............................................................................................................................. 6 - 118
Logic elements ..........................................................................................................................6 - 119
Breaker control .........................................................................................................................6 - 128
Breaker failure / Welded contactor (50BF)................................................................... 6 - 130
CT failure (60CTS)......................................................................................................................6 - 132
Start inhibit.................................................................................................................................. 6 - 135
Emergency restart ..................................................................................................................6 - 139
Lockout reset (86).....................................................................................................................6 - 139
Reset ..............................................................................................................................................6 - 139