GE 889 - Page 266

4–136 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-47: Inadvertent Energization Logic Diagram
894133.cdr
SETPOINT
BLOCK : Off=0
AND
SETPOINT
FUNCTION : Trip Alarm Latched Alarm Configurable
OR
5s
250 ms
Inadv Energ OP
FlexLogic Operands
AND AND
Command
RESET
OR
LED: ALARM
SETPOINT
O/ C PICKUP : IA > PICKUP RUN
S
LATCH
Set-
Dominant
R
Phase A Current (IA) Phase B Current (IB)
Phase C Current (IC)
IB > PICKUP IC > PICKUP
SETPOINT
OUTPUT RELAY X : Do Not Operate , Operate
Disabled
AN D
J1 Current Inputs
SETPOINT
U/V PICKUP : VA (VAB ) < PICKUP RUN VB (VBC) < PICKUP VC (VCA) < PICKUP
J2 Voltage Inputs
OR
AN D
SETPOINT
ARMING MODE : U/V and Offline U/V or Offline Offline
FlexLogic Operand
AN D
OR
AND
OR
AND
LED: TRIP
Trip
Inadv Energ Armed
WYE DELTA
VA VAB VB VBC VC VCA