5-400 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 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.

AR DEAD TIME 1
EXTENSION: 0.50 s
Range: 0.00 to 655.35 s in steps of 0.01

AR RESET:
Off
Range: FlexLogic operand

AR RESET TIME:
60.00 s
Range: 0 to 655.35 s in steps of 0.01

AR BKR CLOSED:
Off
Range: FlexLogic operand

AR BLOCK:
Off
Range: FlexLogic operand

AR PAUSE:
Off
Range: FlexLogic operand

AR INCOMPLETE SEQ
TIME: 5.00 s
Range: 0 to 655.35 s in steps of 0.01

AR BLOCK BKR2:
Off
Range: FlexLogic operand

AR CLOSE TIME BKR2:
0.10 s
Range: 0.00 to 655.35 s in steps of 0.01

AR TRANSFER 1 TO 2:
No
Range: Yes, No

AR TRANSFER 2 TO 1:
No
Range: Yes, No

AR BKR1 FAIL OPTION:
Continue
Range: Continue, Lockout

AR BKR2 FAIL OPTION:
Continue
Range: Continue, Lockout

AR 1-P DEAD TIME:
1.00 s
Range: 0 to 655.35 s in steps of 0.01

AR BKR SEQUENCE:
1-2
Range: 1, 2, 1&2, 1–2, 2–1

AR TRANSFER TIME:
4.00 s
Range: 0 to 655.35 s in steps of 0.01

AR BUS FLT INIT:
Off
Range: FlexLogic operand

AR EVENT:
Disabled
Range: Enabled, Disabled
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