GE 869 - Page 288

4–156 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-55: Overload Alarm logic diagram
89$1.cdr
SETPOINT
Phase A current (Ia)
RUN
SETPOINT
FUNCTION Disabled
PICKUP
DROPOUT DELAY:
AND
Phase B current (Ib) Phase C current (Ic)
LED: PICKUP
Alarm
OR
OR
Phase Currents (RMS) from
J1-CT Bank
AND
Latched Alarm
AND
SETPOINT
BLOCK Off = 0
I
avg
> PICKUP
SETPOINT
t
PKP
LED: ALARM
RESET
Command
S R
LATCH
Configurable
SETPOINTS
OUTPUT RELAY X Do Not Operate, Operate
t
DPO
PICKUP DELAY:
Set
Dominant
Overload Alarm PKP
FlexLogic Operands
Overload Alarm OP
FlexLogic Operands
MOTOR STATUS
Running
MOTOR STATUS
Overload
OR