GE 889 - Page 469

CHAPTER 4: SETPOINTS CONTROL
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–339
Figure 4-141: Sequential Shutdown Logic Diagram
SETPOINTS
RUN
SETPOINTS
FUNCTION: Disabled= 0
Trip
PICKUP MW LEVEL
AND
Operate Output Relay 1 (TRIP)
Alarm
OR
OR
AND
Latched Alarm
AND
BLOCK Off = 0
Forward (positive MW)
Power Direction:
|Measured MW| < PICKUP
SETPOINTS
t
PKP
LED: ALARM
RESET
Command
AND
S
R
LATCH
Configurable
Seq Shtdn OP
FlexLogic Operands
Seq Shtdn PKP
FlexLogic Operands
SETPOINTS
OUTPUT RELAYS 3 (x) Do Not Operate, Operate
0
PICKUP DELAY:
LED: TRIP
Set
Dominant
SETPOINTS
SIGNAL INPUT1
SETPOINTS
Power (MW)
POWER DIRECTION
ARMING INPUT
SETPOINTS
On= 1 (Any FlexLogic Operand)
Reverse (negative MW)
Power Direction:
|Measured MW| > PICKUP
OR
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