Generator; Field Breaker Discrepancy - GE 889 Instruction Manual

CHAPTER 4: SETPOINTS

Generator

Field Breaker
Discrepancy
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
The field breaker discrepancy function is intended for use with synchronous generators. If
a digital input is assigned to this function, any time the field status contact indicates the
field is not applied and the generator status indicates that the generator is online, a trip
occurs once the time delay expires. The time delay may be used to prevent possible
nuisance tripping during shutdown. The field breaker status contact type can be selected
as either "Auxiliary 52a" or "Auxiliary 52b".
Path:
Setpoints > Control > Generator > Field Breaker Discrepancy
FUNCTION
Range: Disabled, Trip, Alarm, Latched Alarm, Configurable
Default: Disabled
ASSIGN DIGITAL INPUT
Range: Off, FlexLogic Operand
Default: Off
This setting assigns the digital input, which represents the status of the field breaker.
FIELD STATUS CONTACT
Range: Auxiliary 52a, Auxiliary 52b
Default: Auxiliary 52a
This setpoint may be set to "Auxiliary 52a", in which case Closed (Digital Input = 1)
indicates that the field breaker is closed. Conversely, this setpoint may be set to
"Auxiliary 52b", in which case Open (Digital Input = 0) indicates the field breaker is closed.
PICKUP DELAY
Range: 0.10 to 600.00 s in steps of 0.01 s
Default: 1.00 s
OUTPUT RELAY
Range: Do Not Operate, Operate
Default: Do Not Operate
BLOCK
Range: Off, Any FlexLogic operand
Default: Off
EVENT:
Range: Enabled, Disabled
Default: Enabled
TARGET:
Range: Self-reset, Latched, Disabled
Default: Self-reset
CONTROL
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