GE UR series, Instruction Manual

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5-240 L60 Line Phase Comparison System GE Multilin
5.6 CONTROL ELEMENTS 5 SETTINGS
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 four reclosing attempts.
The second, third, and fourth attempts always perform three-pole reclosing and have independent dead time delays.
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 single-pole or three-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 single-pole or three-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.
MESSAGE
AR BKR CLOSED:
Off
Range: FlexLogic™ operand
MESSAGE
AR BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
AR PAUSE:
Off
Range: FlexLogic™ operand
MESSAGE
AR INCOMPLETE SEQ
TIME: 5.00 s
Range: 0 to 655.35 s in steps of 0.01
MESSAGE
AR BLOCK BKR2:
Off
Range: FlexLogic™ operand
MESSAGE
AR CLOSE TIME BKR2:
0.10 s
Range: 0.00 to 655.35 s in steps of 0.01
MESSAGE
AR TRANSFER 1 TO 2:
No
Range: Yes, No
MESSAGE
AR TRANSFER 2 TO 1:
No
Range: Yes, No
MESSAGE
AR BKR1 FAIL OPTION:
Continue
Range: Continue, Lockout
MESSAGE
AR BKR2 FAIL OPTION:
Continue
Range: Continue, Lockout
MESSAGE
AR 1-P DEAD TIME:
1.00 s
Range: 0 to 655.35 s in steps of 0.01
MESSAGE
AR BKR SEQUENCE:
1-2
Range: 1, 2, 1&2, 1–2, 2–1
MESSAGE
AR TRANSFER TIME:
4.00 s
Range: 0 to 655.35 s in steps of 0.01
MESSAGE
AR BUS FLT INIT:
Off
Range: FlexLogic™ operand
MESSAGE
AR EVENT:
Disabled
Range: Enabled, Disabled