GE 889 - Page 466

4–336 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTROL CHAPTER 4: SETPOINTS
Figure 4-140: Field Breaker Discrepancy Logic Diagram
LED: ALARM
SETPOINTS
FUNCTION: Disabled = 0 Trip
AND
Operate Output Relay 1 (TRIP)
Alarm
OR
OR
AND
Latched Alarm
AND
BLOCK Off = 0
SETPOINTS
t
PKP
RESET
Command
AND
S R
LATCH
Configurable
Fld BkrDiscr OP
FlexLogic Operands
Fld Bkr Discr PKP
FlexLogic Operands
SETPOINTS
OUTPUT RELAYS
2
to
X
Do Not Operate, Operate
0
PICKUP DELAY:
LED: TRIP
Set Dominant
SETPOINTS
Field Status Contact
Auxiliary 52a Auxiliary 52b
OR
AND
Assigned Digital Inputs Status Low = 0 Assigned Digital Inputs Status High = 1
AND
AND
FLEXLOGIC OPERAND
Online
Any Digital input selected value =1 (Enable) else Value = 0 (Disable)
SETPOINTS
ASSIGN DIGITAL INPUT
SETPOINTS
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