GE Multilin 850

4–238 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-99: Wattmetric Ground Fault logic diagram
LED: PICKUP
Calculated In or
Measured Ig
SETPOINTS
BLOCK: Off=0
AND
SETPOINTS
WATT GND FLT FUNCTION: Disabled Trip Alarm Latched Alarm Configurable
OR
SETPOINTS
WATT GND FLT ECA: Operating Power S
OP
SETPOINTS
WATT GND FLT POWER PKP DELAY:
t
PKP
0
FlexLogic Operands
AND AND AND
Command
RESET
OR
LED: ALARM
LED: TRIP
Operate Output Relay 1 (TRIP)
RUN
SETPOINTS
OUTPUT RELAYS (3-7):
Do Not Operate, Operate
Watt GndFlt 1 PKP
Watt GndFlt 1 OP
SETPOINTS
WATT GND FLT CURRENT:
Calculated Vn or
Measured Vx
SETPOINTS
WATT GND FLT VOLTAGE :
SETPOINTS
WATT GND FLT POWER PICKUP:
S
OP
> PKP
RUN
WATT GND FLT VOLTAGE PICKUP : WATT GND FLT CURRENT PICKUP:
V
MAG
> PKP
RUN
I
MAG
> PKP
RUN
AND
SETPOINTS
WATT GND FLT CURVE: Delay WATT GND FLT REF POWER PICKUP: WATT GND FLT MULTIPLIER:
RUN
S
LATCH
Set-
Dominant
R
SETPOINTS
CT Input CT Bank 1 – J1
SETPOINTS
VT Input Ph VT Bank 1 – J2
894053A2.cdr