Toshiba GR200 Series Instruction Manual page 450

Dead time (Delay timers TTPAR† and TD_MS2–5)
(vii)
The dead time is the time interval from relay operation i.e. the initiation of the auto-reclose
scheme, to the inception of the 'ARC1 CLOSE COMMAND' used to energize the circuit breaker
closing circuit and is provided by delay timer [TTPAR1]. A substitute delay timer
[TTPAR1_SUB] is also available when the user wishes to program the inception of the 'ARC
1SHOT1' signal using the PLC function instead of [TTPAR1], this feature is only provided in
the event that the user wishes to replace the original logic.
The dead times for sequential operation of the autoreclose scheme 'ARC1 SHOT2' to
'ARC1 SHOT5', are provided by delay timers [TD_MS2]–[TD_MS5], respectively.
†Note: delay timer [TTPAR] is available when the ARC function operates in TPAR mode.
For the operation in other SPAR, MPAR, and ORGAR modes, the user should also
set values for delay timers [TSPAR1], [TMPAR1], and [TORGAR1].
Pulse width of 'ARC1 CLOSE COMMAND' (Setting TCCW1)
(viii)
An 'ARC1 CLOSE COMMAND' signal is issued after the dead time. Setting [TCCW1] is used
to define the pulse-width of the reclosing commands for respective shots1–5.
Final trip stage to abandon CB reclosure (Signal 'ARC1 FT' and
(ix)
setting TRR1, TRR_MS2–5)
TRR1 is the time from the ARC1 initiation to abandoning issuing the 'ARC1 SHOT1'. In TPAR†
mode the permissive signal 'ARC1-VCHK' must be issued by the VCHK function within the
time interval of TRR1 at the end of the dead time (i.e., TRR1 has not timed out), otherwise the
ARC function abandons the reclosure of CB#1. That is, if TTPAR1 has timed out and 'ARC1-
VCHK' permissive has not been issued within TRR1 time, TRR1 signal yielded in the TPAR
mode ends up 'Final Trip (ARC1 FT)'. Note that the timer setting of the [TRR1] timer should
be set greater than that applied to the dead time delay timer [TTPAR1] to ensure that the dead
time has fully expired.
Likewise, for shots 2–5 the timers [TRR_MS2] and others issue the signal for 'Final Trip
(ARC1 FT)' if the respective shots are not issued within the set time.
†Note: We can see similar ARC behavior in the other SPAR, MPAR, and ORGAR modes.
Reset for tripping failure (Signal 'ARC1 RESET' and setting TRESET)
(x)
Subsequent to the reception of the 'GEN.TRIP' signal, a check is required to determine whether
the CB#1 has opened. If the CB#1 has not opened within the time setting of timer [TRESET],
then "CB#1 failing to be opened" is judeged by the 'ARC1 RESET' signal, which also resets the
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6F2S1914 (0.49)
GRL200 (Soft 033 & 037)