GE MI-869 - Page 366

4–248 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-91: Reactive Power Logic Diagram
894174A1.cdr
SETPOINT
Configurable
TRIP FUNCTION:
Disabled=0 Trip
Motor Stopped
FLEXLOGIC OPERAND
SETPOINT
BLOCK:
Off=0
AND
AND
SETPOINT
LATCH ALARM
ALARM FUNCTION:
Disabled=0 ALARM
OR
AND
RUN
Positive Var Trip Pickup:
SETPOINT
when kVar > 0
&
|Reactive Power| > Pickup
Positive Var TRIP DELAY:
SETPOINTS
t
PKP
0
SETPOINTS
t
PKP
OR
Operate Output
Relay 1(TRIP)
LED: TRIP
Pos Var Trip PKP
FLEXLOGIC OPERANDS
SETPOINT
Trip Relays
Do Not Operate, Operate
OR
ACTUAL VALUES
Pwr1 Reactive
AND
RUN
Negative Var Trip Pickup:
SETPOINT
0
Negative Var TRIP DELAY:
Pos Var Trip OP
Neg Var Trip PKP
FLEXLOGIC OPERANDS
Neg Var Trip OP
AND
RUN
Positive Var Alarm Pickup:
SETPOINT
Positive Var Alarm DELAY:
SETPOINTS
t
PKP
0
SETPOINTS
t
PKP
RUN
Negative Var Alarm Pickup:
SETPOINT
0
Negative Var Alarm DELAY:
LED: Alarm
AND AND
OR
LATCH
S R
RESET
Command
OR
Pos Var Alarm PKP FLEXLOGIC OPERANDS
SETPOINT
Alarm Relays
Do Not Operate, Operate
Pos Var Alarm OP
Neg Var Alarm PKP
FLEXLOGIC OPERANDS Neg Var Alarm OP
From Metering/Power1
when kVar < 0
&
|Reactive Power| > Pickup
when kVar > 0
&
|Reactive Power| > Pickup
when kVar < 0
&
|Reactive Power| > Pickup
BLOCK FROM ONLINE:
SETPOINT
t
BLK
0