Toshiba GRL100-701B Instruction Manual page 125

Autoreclose is not activated when an autoreclose prohibiting binary input signal is applied at the
local or remote terminal.
• ARC_BLOCK signal common for leader and follower CB
• ARC_BLOCK1 signal for leader CB
• ARC_BLOCK2 signal for follower CB
The autoreclose scheme is different depending on the reclosing mode.
Single-phase autoreclose and single- and three-phase autoreclose
The breaker(s) to be reclosed and the reclosing order can be set by the scheme switch [ARC-CB]
as follows:
Setting of [ARC-CB] Autoreclose mode
ONE (Set when applied to a one-breaker system)
O1 Only the busbar breaker is reclosed and the center breaker is subjected to final tripping.
O2 Only the center breaker is reclosed and the busbar breaker is subjected to final tripping.
L1 Single-phase autoreclose: Both breakers are reclosed simultaneously. (∗1)
Three-phase autoreclose: The busbar breaker is reclosed first. If successful, then the
center breaker is reclosed.
L2 Single-phase autoreclose: Both breakers are reclosed simultaneously. (∗1)
Three-phase autoreclose: The center breaker is reclosed first. If successful, then the
busbar breaker is reclosed.
Note : " " is set only when the relay is applied to a one-breaker system. Trip and reclose
ONE
commands are output only for CB1(bus CB).
(∗1): Sequential autoreclose can be applied by changing of the dead timer setting or the PLC
setting.
(∗2): When [ARC-M] – MPAR is selected, the autoreclose mode depends on the [ARC-CCB]
setting and the [ARC-CB] is not applied.
The autoreclose scheme logic for the two circuit breakers is independent of each other and are
almost the same. The autoreclose scheme logic of the circuit breaker to be reclosed first (lead
breaker) is the same as that shown in Figure 2.15.2.1. The scheme logic of the circuit breaker to
be reclosed later (follower breaker) is shown in Figure 2.15.2.8.
The start of the dead time counter can be configured by the PLC. In the default setting, the
single-phase autoreclose is started instantaneously after tripping, and the three-phase autoreclose
is started after the ARC-SET condition is satisfied.
The "ARC-SET" is a scheme signal whose logical level becomes 1 when a leader breaker's
autoreclose command is output.
In default setting, therefore, the dead time of the follower breaker is as follows:
• Three-phase autoreclose: equal to the sum of the dead time setting of the two breakers.
• Single-phase autoreclose: TSPR2
However, the dead time can be set that of the leader breaker by the PLC setting "RF.ST-REQ".
The shortening of the dead time can be also applied when the leader breaker is final-tripped
because it is no ready.
(TTPR1 + TTPR2)
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