GE MI-869 - Page 277

CHAPTER 4: SETPOINTS PROTECTION
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–159
Figure 4-51: Ground Fault logic diagram
89$1.cdr
RUN
TRIP PICKUP:
SETPOINT
Ig > Pickup
RUN
Ig > Pickup
Motor Starting
FLEXLOGIC OPERAND
SETPOINT
Configurable
TRIP FUNCTION:
Disabled=0
Trip
SETPOINT
BLOCK:
Off=0
SETPOINT
LATCH ALARM
ALARM FUNCTION:
Disabled=0
ALARM
OR
AND
OR
AND
ALARM PICKUP:
SETPOINT
TRIP PICKUP START DELAY:
SETPOINTS
TRIP DROPOUT DELAY:
t
PKP
t
RST
SETPOINTS
TRIP DROPOUT DELAY:
t
PKP
t
RST
AND
AND
ALARM PICKUP DELAY:
SETPOINTS
ALARM DROPOUT DELAY:
t
PKP
t
RST
OR OR
AND
Operate Output
Relay 1(TRIP)
LED: TRIP
LED: Alarm
AND AND
OR
LATCH
S R
RESET
Command
GndFault Trip PKP
FLEXLOGIC OPERANDS
GndFault Trip OP
GndFault Alarm PKP FLEXLOGIC OPERANDS GndFault Alarm OP
SETPOINT
Trip Output Relay X
Do Not Operate, Operate
SETPOINT
Alarm Output Relay X
Do Not Operate, Operate
I
g
SETPOINT
GROUND CT TYPE:
1/5A
50:0.025A*
* if selected in the order code otherwise use 1/5A
20ms
0
Motor Stopped
TRIP PICKUP RUN DELAY:
OR