GE L60 Instruction Manual page 316

5.6 CONTROL ELEMENTS
5
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 reclose with either the 1-Pole or 3-Pole dead time according to the fault type and reclose mode; the second breaker
should follow the successful reclosure of the first breaker. When reclosing simultaneously, for the first shot both breakers
should reclose with either the 1-Pole or 3-Pole dead time, 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 multi-phase faults. The autoreclose scheme has five operating states.
5-214
AR BKR CLOSED:
MESSAGE
Off
AR BLOCK:
MESSAGE
Off
AR PAUSE:
MESSAGE
Off
AR INCOMPLETE SEQ
MESSAGE
TIME: 5.00 s
AR BLOCK BKR2:
MESSAGE
Off
AR CLOSE TIME BKR2:
MESSAGE
0.10 s
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 BUS FLT INIT:
MESSAGE
Off
AR EVENT:
MESSAGE
Disabled
L60 Line Phase Comparison Relay
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: 0 to 655.35 s in steps of 0.01
Range: FlexLogic™ operand
Range: 0.00 to 655.35 s in steps of 0.01
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: FlexLogic™ operand
Range: Enabled, Disabled
5 SETTINGS
GE Multilin