Toshiba GR-200 Series Instruction Manual page 267

Fault current
Closed
CB Status
Open
Operated
Relay operation
Issued
GEN.TRIP
ARC IN-PROG
ARC-S1 IN-PROG
ARC SHOT1 Dead time [TSHOT1]
ARC-S2 IN-PROG
ARC SHOT2
ARC-S3 IN-PROG
ARC SHOT3
ARC CLOSE COMMAND
Closed
CB ALLPH
Open
CLOSE
ARC CLOSE SUCCESS
ARC CLOSE FAIL
Lock out
ARC FT
Figure 2.22-14 Multi shot scheme [ARCNUM]=S3 for a Permanent fault
Note:
1. As described in Chapter 2.22.4(iii), the permissive signal 'ARC-VCHK' is required for
ARC SHOT1 operation, but has been omitted for clarity in this figure.
2. While 'ARC-VCHK' permissive signal is introduced automatically for ARC-SHOT1, For
ARC-SHOT2 and onwards, the user must introduce the permissive signal from the
VCHK function by using PLC programming.
Shot number coordination
2.22.6
When a distribution feeder is protected by two or more relays, the coordination of the shot-
counter in the relays needs to be considered. For example, as shown in Figure 2.22-15, relay G
and relay R protect the same main feeder; relays G and R are programmed to issue two first
trip commands and two delayed trip commands successively†: DT
IDMT trips.
(4)
Dead time [TD_MS2]
[TCCW]
)
- 248 -
Dead time [TD_MS3]
[TCCW]
)
(1)
6F2T0200 (0.15)
[TCCW]
)
, DT , IDMT , and
(2) (3)
GRE200 (1,2)