132
6
F
2
S
0
8
3
4
•
When an autoreclose prohibiting binary input signal is applied (ARC_BLOCK =1)
If autoreclosing is not ready, a three-phase tripping command M-TRIP is output for all tripping
modes. At this time, autoreclose is not activated.
Autoreclose for single-phase fault
If the autoreclose mode is set to "SPAR" or "SPAR & TPAR", single-phase tripping is performed.
The dead time counter TSPR for single-phase reclosing is started by any of the tripping signals
TRIP-A to C. After the dead time has elapsed, reclosing command ARC is output.
If the autoreclose mode is set to "TPAR", three-phase tripping is performed and the dead time
counter TTPR1 for three-phase reclosing is started. After the dead time has elapsed, reclosing
command ARC is output based on the operating conditions of the voltage and synchronism check
elements output signal SYN-OP. (The SYN-OP is assigned by the PLC as a default setting.)
If the autoreclose mode is set to "Disable"("Off"), three-phase tripping is performed and
autoreclose is not started. Even though the autoreclose is started, the autoreclose is reset if all
phases of the CB are closing.
Autoreclose for multi-phase fault
Regardless of the autoreclose mode, three-phase tripping is performed and TRIP-A to C are
activated. If the autoreclose mode is set to "TPAR" or "SPAR & TPAR", the dead time counter
TTPR1 for three-phase reclosing is started. After the dead time has elapsed, reclosing command
ARC is output based on the operating conditions of the voltage and synchronism check elements
output signal SYN-OP. (The SYN-OP is assigned by the PLC as a default setting.)
If the autoreclose mode is set to "SPAR" or "Disable"("Off"), autoreclose is not activated.
If the operating conditions of the voltage and synchronism check elements are not satisfied during
three-phase reclosing, TRR is then picked up and reclosing is reset.
Autoreclose for evolving fault
Figure 2.7.2.2 shows the sequence diagram of autoreclose for an evolving fault. If single-phase
tripping is performed, the evolving fault detection timer TEVLV is started at the same time as the
TSPR is started. If no evolving faults occur, single-phase reclosing is performed when TSPR is
picked up.
Evolving fault
First fault
Fault
Trip
3
φ
reclosing
1
φ
reclosing
1
φ
trip
3
φ
trip
TSPR
TEVLV
TSPR
TTPR1
TEVLV
TTPR1
Figure 2.7.2.2 Autoreclose for Evolving Fault
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Summary of Contents for GRZ100-211B
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