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7.MAINTENANCE
TOC-4
Neutral instantaneous overcurrent................................................................................. 6 - 88
Phase undervoltage................................................................................................................ 6 - 90
Phase overvoltage................................................................................................................... 6 - 93
Underfrequency........................................................................................................................ 6 - 96
Overfrequency........................................................................................................................... 6 - 99
Underpower................................................................................................................................ 6 - 102
Negative sequence overvoltage....................................................................................... 6 - 105
Phase reversal ........................................................................................................................... 6 - 107
VT fuse fail ................................................................................................................................... 6 - 107
Acceleration protection ........................................................................................................ 6 - 108
RTD protection........................................................................................................................... 6 - 110
Two-speed motor .................................................................................................................... 6 - 116
Two-speed motor setup ......................................................................................................6 - 117
High speed thermal protection ........................................................................................6 - 118
High speed short circuit settings.....................................................................................6 - 118
High speed acceleration......................................................................................................6 - 121
High speed undercurrent....................................................................................................6 - 121
S4 Control.............................................................................................................................. 6 - 124
Virtual inputs .............................................................................................................................. 6 - 125
Logic elements .......................................................................................................................... 6 - 126
Breaker failure / Welded contactor................................................................................. 6 - 142
Start inhibit.................................................................................................................................. 6 - 145
Emergency restart................................................................................................................... 6 - 148
Lockout reset ............................................................................................................................. 6 - 148
Reset .............................................................................................................................................. 6 - 148
Breaker control ......................................................................................................................... 6 - 148
S5 Inputs/Outputs ............................................................................................................. 6 - 150
Contact inputs ........................................................................................................................... 6 - 151
Output relays ............................................................................................................................. 6 - 152
Output Relays - Breaker.......................................................................................................6 - 153
Output Relays - Contactor..................................................................................................6 - 161
Virtual inputs .............................................................................................................................. 6 - 164
M1 Relay information....................................................................................................... 7 - 4
M2 Motor maintenance .................................................................................................. 7 - 6
M3 Breaker maintenance .............................................................................................. 7 - 7
Trip coil.......................................................................................................................................... 7 - 7
Close coil ...................................................................................................................................... 7 - 10
Breaker trip counter................................................................................................................ 7 - 13
Reset counters .......................................................................................................................... 7 - 15
M4 Breaker monitor.......................................................................................................... 7 - 16
M5 Relay maintenance ...................................................................................................7 - 17
Ambient temperature ............................................................................................................ 7 - 17
M6 Factory service............................................................................................................ 7 - 20
Change notes ...................................................................................................................Appendix - 1
Manual Revision history.................................................................................................... Appendix - 1
339C MOTOR PROTECTION SYSTEM - INSTRUCTION MANUAL
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