GE 889 - Page 487

CHAPTER 4: SETPOINTS CONTROL
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–357
Figure 4-150: Trip Bus logic diagram
Disabled = 0
SETPOINTS
TRIP BUS 1 INPUT 1: Off = 0
SETPOINTS
TRIP BUS 1 FUNCTION : Disabled Trip
Operate Output Relay 1 (TRIP)
LED: TRIP
Alarm
OR
OR
AND
Latched Alarm
AND
SETPOINTS
TRIP BUS 1 BLOCK : Off = 0
LED: ALARM /
LATCHED ALARM
Command
AND
S R
LATCH
SET-
DOMINANT
Configurable
FlexLogic Operands
Trip Bus 1 OP
SETPOINTS
TRIP BUS 1 LATCHING: Disabled = 0
SETPOINTS
TRIP BUS 1 PICKUP DELAY: TRIP BUS 1 DROPOUT DELAY:
t
PKP
t
DPO
SETPOINTS
Do Not Operate, Operate RELAYS
SETPOINTS
TRIP BUS 1 INPUT 2 : Off = 0
SETPOINTS
TRIP BUS 1 INPUT 16: Off = 0
OR
. . .
. . .
RESET
AND
SETPOINTS
TRIP BUS 1 RESET:
OR
S R
LATCH
SET-
DOMINANT
NON VOLATILE
Trip Bus 1 PKP
FlexLogic Operands
LED: PICKUP
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