Toshiba GR 200 Series, Instruction Manual

Page: 362 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 341 -
reclose operation of the CB#1. The duration of the setting applied to the [
TRESET
] timer must
be less than the setting applied to the ARC dead time delay timers (e.g. [
TTPAR
] etc.).
(xi)
Decision time for successful operation or failure (Setting TARCSUC
and signals ‘ARC1 CLOSE SUCCESS’, ‘ARC1 CLOSE FAIL’, ‘ARC1
SHOT RS’)
The [
TARCSUC
] timer provides the following functionality depending on the setting of scheme
switch [
ARC-SucChk
].
Scheme switch [ ARC-SucChk ]= On
With [
ARC-SucChk
] set to
On
, timer [
TARCDSUC
] is used to define the checkpoint at which
the CB#1 (and #2) are closed successfully after issuing the ‘ARC1(or 2) CLOSE COMMAND’
signal following which, an ‘ARC1( or 2) CLOSE SUCCESS’ signal is issued.
If the CB fails to close within the setting of timer [
TARCSUC
],an ‘ARC1 CLOSE FAIL’ signal
is issued and the ARC1 function moves to the ‘Final trip (ARC1 FT)’ stage.
Successful reclose of the CB (subsequent to fault clearance) is checked by the ‘Success
check’ logic, which checks for the signal ‘CB1_ALLPH_CLOSE’ provided by the protection
common function (PROT_COMMON). Clearing the fault automatically resets the ARC1
operation.
Scheme switch [ ARC-SucChk ]= Off
With [
ARC-SucChk
] set to
Off
, timer [
TARCSUC
] may be used to check for a successful closure
following the issue of the ‘ARC1 SHOT’ command. The ‘ARC1 SHOT RS’ signal is generated
which is used for resetting the ARC function about the CB#1 reclosure.
Note: a CB failure to close condition cannot be detected; the user shall incorporate the
check scheme externally.
(xii)
Progress of ARC operation (Signals ‘ARC1 IN-PROG’ and others)
Information regarding the progress of an ARC operation is provided following the reception of
the ‘GEN.TRIP-A/B/C’ signals as follows:
Entire ARC progress for all shots (signal ‘ARC1 IN-PROG’)
The ‘ARC1 IN-PROG’ signal is defined for the time from issuing the first ‘GEN.TRIP-A/B/C’ to
the confirmation of the ARC successful operation or the final trip.
Respective progress for respective shots (signal ‘ARC1-S* IN-PROG/OR’)