Toshiba GRZ100 B Series, Instruction Manual

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The voltage and synchronism check is performed as shown below according to the [ARC-CB]
settings:
Setting of [ARC-CB] Voltage and synchronism check
ONE or O1 A voltage and synchronism check is performed using voltages VB and VL1.
O2
A voltage and synchronism check is performed using voltages VL1 and VL2.
L1 Since the logical level of TPARL-SET is 0, a voltage and synchronism check is performed
for the busbar breaker using voltages VB and VL1. Then, the logical level of TPARL-SET
becomes 1 and a voltage and synchronism check is performed for the center breaker
using voltages VL1 and VL2 and a reclosing command is output to the center breaker.
L2 A voltage and synchronism check is performed for the center breaker using voltages VL1
and VL2. Then, the logical level of TPARL-SET becomes 1 and a voltage and synchronism
check is performed for the busbar breaker using voltages VB and VL1.
Note :
"
ONE
" is set only when the relay is applied to one-breaker system. Trip and reclose commands
are output only for CB1(bus CB).
The energizing control for the two circuit breakers can be set by the scheme switch [VCHK] as
follows:
Setting of [VCHK] Energizing control
LB1 The lead breaker is reclosed under the "live bus and dead line" condition or with
synchronism check, and the follower breaker is reclosed with synchronism check only.
LB2 The leader breaker is reclosed under the "live bus and dead line" condition or with
synchronism check, and the follower breaker is reclosed under the "dead bus and live line"
condition or with synchronism check.
DB Both breakers are reclosed under the "dead bus and live line" condition or with
synchronism check.
SYN Both breakers are reclosed with synchronism check only.
OFF Both breakers are reclosed without voltage and synchronism check.
The scheme switch [ARC-SUC] is used to check the autoreclose succeeds. If all three phase CB
contacts have been closed within TSUC time after ARC shot output, it is judged that the
autoreclose has succeeded (AS). If not, it is judged that the autoreclose has failed (AF), and
becomes the final tripping (FT).
The relay provides the user configurable switch [UARCSW] with three-positions (P1, P2, P3) to
be programmed by using PLC function. Any position can be selected. If this switch is not used for
the PLC setting, it is invalid.
2.6.3 Setting
The setting elements necessary for the autoreclose and their setting ranges are shown in the table
below.
Element Range Step Default Remarks
VT 1 - 20000 1 2000 VT ratio for distance protection
VTs1 1 - 20000 1 2000 VT ratio for voltage and synchronism check
TSPR1 0.01 - 10.00 s 0.01 s 0.80 s Dead time for single - phase autoreclose
TTPR1 0.01 - 100.00 s 0.01 s 0.60 s Dead time for three - phase autoreclose
TRR 0.01 - 100.00 s 0.01 s 2.00 s Autoreclose reset time
TEVLV 0.01 - 10.00 s 0.01 s 0.30 s Dead time reset for evolving fault
TRDY1 5 - 300 s 1 s 60 s Reclaim time