5-24 F650 Digital Bay Controller GE Multilin
5.4 PROTECTION ELEMENTS 5 SETPOINTS
5
5.4PROTECTION ELEMENTS 5.4.1 CHANGE OF SETPOINT TABLES IN F650 UNITS
F650 relays incorporate the following protection units:
CURRENT UNITS
Instantaneous overcurrent:
3 x PHASE IOC HIGH (50PH)
3 x PHASE IOC LOW (50PL)
3 x NEUTRAL IOC (50N)
3 x GROUND IOC (50G)
3 x SENSITIVE GROUND IOC (50SG)
3 x ISOLATED GROUND IOC (50IG)
Time delayed overcurrent:
3 x PHASE TOC HIGH (51PH)
3 x PHASE TOC LOW (51PL)
3 x NEUTRAL TOC (51N)
3 x GROUND TOC (51G)
3 x SENSITIVE GROUND TOC (51SG)
Negative sequence overcurrent:
3 x NEGATIVE SEQUENCE TOC (46P)
Thermal image:
3 x THERMAL MODEL (49P)
DIRECTIONAL UNITS
3 x PHASE DIR (67P)
3 x NEUTRAL DIR (67N)
3 x GROUND DIR (67G)
3 x SENSITIVE GROUND DIR (67SG)
VOLTAGE UNITS
Phase under/overvoltage
3 x PHASE UV (27P)
3 x PHASE OV (59P)
Zero sequence overvoltage
3 x NEUTRAL OV HIGH (59NH)
3 x NEUTRAL OV LOW (59NL)
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