GE D60 Instruction Manual page 505

CHAPTER 5: SETTINGS CONTROL ELEMENTS
The feature is programmed to perform fault duration calculations. Fault duration is defined as a time between operation of
the disturbance detector occurring before initiation of this feature, and reset of an internal low-set overcurrent function.
Correction is implemented to account for a non-zero reset time of the overcurrent function.
Breaker arcing currents and fault duration values are available under the
ACTUAL VALUES  RECORDS  MAINTENANCE 
menus.
BREAKER 1(2)
— Select the same output operands that are configured to operate the output relays used to trip the
BKR 1 ARC AMP INT-A(C)
breaker. In three-pole tripping applications, configure the same operand to initiate arcing current calculations for poles A,
B, and C of the breaker. In single-pole tripping applications, configure per-pole tripping operands to initiate the calculations
for the poles that are actually tripped.
— This setting is used to program the delay interval between the time the tripping sequence is
BKR 1 ARC AMP DELAY
initiated and the time the breaker contacts are expected to part, starting the integration of the measured current.
— Selects the threshold value above which the output operand is set.
BKR 1 ARC AMP LIMIT
2 2
— Selects a FLexLogic Operand to clear the accumulated I t values (kA -cycle), reset fault duration
BKR 1 CLR ARC AMPS
2
items (breaker operating time), clear ARCING AMPS (kA -cycle) and AMP MAX (kA) values of the last event.
— This setting specifies the maximum symmetrical interruption rating of the circuit breaker.
BKR 1 INTERUPTION RATING
Figure 5-188: Arcing current measurement
5
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5-327