GE 845 Instruction Manual page 376

MONITORING
FASTPATH:
4–272
INCOMPLETE TRP/CLS TIME
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 0.100 s
The setting declares a breaker operation failure condition if the breaker does not
respond within this time delay. The setting should be greater than the Trip time PKP
value and Close time PKP value.
ARC TIME PICKUP
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 0.100 s
The setting sets the Pickup level of the Arc time. The Arc time is initiated by the OPEN
STATUS signal and stopped when the current samples in one cycle are less than 0.02 CT.
Then the Arc time is equal to the calculated time interval minus one cycle.
INCOMPLETE ARC TIME
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 0.300 s
The setting declares an Arc time failure condition if there are currents flowing through
the breaker after this time delay. This setting should be greater than the Arc time PKP
value.
SPRING CHARGE TIME PICKUP
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 15.000 s
This setting sets the Pickup level of the Spring Charge time. The Spring Charge time is
measured from the pulse duration of the SPRING CHARGE STATUS.
INCOMPLETE CHARGE TIME
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 45.000 s
The setting declares a Charge time failure condition if the spring charging process is not
finished after this time delay. The setting should be greater than the Charge time PKP
value.
ARC ENERGY PICKUP
Range: 1 to 100000 kA2-c in steps of 1 kA2-c
Default: 1000 kA2-c
The setting sets the Pickup level of the arc energy. The arc energy value is calculated in
the Breaker Arcing Current element.
The ARC ENERGY is calculated by the breaker arcing current element. If the breaker arcing
current element is disabled, the ARC ENERGY is not calculated and this setting should not
be used. The ARC ENERGY used here is the individual value for each trip and not the
accumulated value recorded in the Breaker Arcing Current element.
ALARM COUNTER
Range: 1 to 100 in steps of 1
Default: 5
The setting sets the alarm counter level. One counter is used to accumulate the Pickup
data from all monitoring quantities. If the counter value is above the alarm counter level,
the LED is lit and one operand is asserted.
BLOCK
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS