4–144 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
ALARM PICKUP DELAY
Range: 0.00 to 600.00 s in steps of 0.01 s
Default: 1.00 s
This setting specifies a time delay for the alarm function. Once the operating quantity
3rd Harm VN is lower than the Alarm Pickup level for the Alarm Pickup Delay, an alarm
occurs indicating a fault condition.
ALARM RELAY
Range: Do Not Operate, Operate
Default: Operate
BLOCKING MIN POWER
Range: 0.000 to 1.250 x Rated in steps of 0.001
Default: 0.200 x Rated
This setting specifies the minimum real power that inhibits this element. If the measured
power is above this setting but below the Blocking Max Power setting, the element is
blocked. This setting applies to three-phase real power where the rated real generator
power is the base unit.
NOTE:
If the Blocking Min Power is set to “0.000”, then the element does not operate for all power
values that are less than the Blocking Max Power setting.
BLOCKING MAX POWER
Range: 0.000 to 1.250 x Rated in steps of 0.001
Default: 0.200 x Rated
This setting specifies the maximum real power that inhibits this element. If the measured
power is below this setting but above the Blocking Min Power setting, the element is
blocked. This setting applies to three-phase real power, where the rated real generator
power is the base unit.
NOTE:
The base quantity (Rated) is the rated real power and calculated as:
Rated Real Power = Rated MVA x Rated Power Factor
Rated MVA and Rated Power Factor are programmed under Setpoints > System >
Generator.
BLOCKING LOW VOLTAGE
Range: 0.00 to 1.50 x VT in steps of 0.01
Default: 0.50 x VT
This setting specifies the minimum voltage that allows this element to run. If the
measured voltage is below, the element is blocked. This setting applies to the positive
sequence voltage where Phase VT Secondary programmed under Setpoints > System >
Voltage Sensing is the base unit.
BLOCK
Range: FlexLogic operand
Default: Off
EVENTS
Range: Enabled, Disabled
Default: Enabled
TARGETS
Range: Self-reset, Latched, Disabled
Default: Latched
To Next Page
Loading...
