GE Power Management
735/737 Feeder Protection Relay 3-7
3 SETUP AND OPERATION 3.3 INDICATORS
3
d) GROUND INSTANTANEOUS TRIP
When the ground (neutral) current exceeds the GROUND INSTANTANEOUS setting, the relay will trip and this indicator will
be set to indicate ground instantaneous trip.
3.3.3 PHASE CURRENT INDICATOR [12]
Maximum RMS current in any phase as a percentage of CT primary rating for the range 10 to 100% is displayed on this
bargraph indicator. If current in all phases is below 10% of CT rating, all segments will be off. For currents above 100% of
CT rating all segments will be on. All segments up to the actual current will be on for values between 10 and 100%.
For example: CT RATING: 200:5
PHASE PICKUP: 70% of CT (LO)
PHASE CURVE: Normal inverse-LO
ACTUAL CURRENT: 165 A
DISPLAY: 165/200 = 83%
10% - 80% on
83% > 70% pickup so PHASE PICKUP indicator is flashing
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