GE 889 - Page 285

CHAPTER 4: SETPOINTS PROTECTION
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–155
Figure 4-55: Generator Overload Alarm Logic Diagram
SETPOINT
Load Current from Generator Metering (J1-CT Bank)
RUN
SETPOINT
Function Disabled
Pickup
Dropout Delay
AND
LED: PICKUP
Alarm
OR
OR
AND
Latched Alarm
AND
SETPOINT
Block Off = 0
Load Current >
PICKUP
SETPOINT
t
PKP
LED: ALARM
RESET
Command
S R
LATCH
Configurable
SETPOINTS
Output Relay Do Not Operate, Operate
t
DPO
Pickup Delay
Set
Dominant
Overload Alarm PKP
FlexLogic Operands
Overload Alarm OP
FlexLogic Operands
894145.CDR