GE C60 Instruction Manual page 132
Multilin
breaker management relay
ur series
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5.6 CONTROL ELEMENTS
5
a) DESCRIPTION
The autoreclose scheme is intended for use on transmission lines with circuit breakers operated in both the single pole and
three pole modes, in one or two breaker arrangements. The autoreclose scheme provides four programs with different
operating cycles, depending on the fault type. Each of the four programs can be set to trigger up to two reclosing attempts.
The second attempt always performs three pole reclosing and has an independent dead time delay.
When used in two breaker applications, the reclosing sequence is selectable. The reclose signal can be sent to one
selected breaker only, to both breakers simultaneously or to both breakers in sequence (one breaker first and then, after a
delay to check that the reclose was successful, to the second breaker). When reclosing in sequence, the first breaker
should trip and reclose single pole or three pole, according to the fault type and reclose mode; the second breaker should
always trip and reclose 3-Pole. When reclosing simultaneously, for the first shot both breakers should trip and reclose either
single pole or three pole, according to the fault type and the reclose mode.
The signal used to initiate the autoreclose scheme is the trip output from protection. This signal can be single pole tripping
for single phase faults and three phase tripping for multiphase faults.
OPERATION:
The autoreclose scheme has five operating states, defined below.
Table 5–14: AUTORECLOSE OPERATION
STATE
Enabled
Disabled
Reset
Reclose In Progress
Lockout
5-68
AR PAUSE:
MESSAGE
Off
AR INCOMPLETE SEQ
MESSAGE
TIME: 5.00 s
AR BLOCK BKR2:
MESSAGE
Off
AR CLOSE TIME BKR2:
MESSAGE
Off
AR TRANSFER 1 TO 2:
MESSAGE
No
AR TRANSFER 2 TO 1:
MESSAGE
No
AR BKR1 FAIL OPTION:
MESSAGE
Continue
AR BKR2 FAIL OPTION:
MESSAGE
Continue
AR 1-P DEAD TIME:
MESSAGE
1.00 s
AR BKR SEQUENCE:
MESSAGE
1-2
AR TRANSFER TIME:
MESSAGE
4.00 s
AR EVENT:
MESSAGE
Disabled
CHARACTERISTICS
Scheme is permitted to operate
Scheme is not permitted to operate
Scheme is permitted to operate and shot count is reset to 0
Scheme has been initiated but the reclose cycle is not finished (successful or not)
Scheme is not permitted to operate until reset received
C60 Breaker Management Relay
Range: FlexLogic™ operand
Range: 0 to 655.35 s in steps of 0.01
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: Yes, No
Range: Yes, No
Range: Continue, Lockout
Range: Continue, Lockout
Range: 0 to 655.35 s in steps of 0.01
Range: 1, 2, 1&2, 1–2, 2–1
Range: 0 to 655.35 s in steps of 0.01
Range: Enabled, Disabled
5 SETTINGS
GE Multilin
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