GE MI-869 - Page 345

CHAPTER 4: SETPOINTS PROTECTION
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–227
Figure 4-79: Negative Sequence Overvoltage Protection logic diagram
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SETPOINTS
SETPOINT
FUNCTION : Disabled Trip
PICKUP :
AND
Operate Output Relay 1 (TRIP)
LED: PICKUP
LED: TRIP
Alarm
OR
OR
AND
Latched Alarm
AND
SETPOINTS
BLOCK : Off = 0
LED: ALARM /
LATCHED ALARM
RESET
Command
AND
S R
LATCH
Configurable
FlexLogic Operands
Neg Seq OV 1 OP
:
Neg Seq OV 1 PKP :
SETPOINTS
PICK-UP DELAY: DROP-OUT DELAY:
t PKP
t RST
V_2 > PICKUP
RUN
SETPOINTS
Do Not Operate , Operate RELAYS