Toshiba GR200 Series - (iv) FL calculation result; (v) Evolving faults; (vi) Fault quantities and pre-fault-quantities

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 1148 -
†Note: A number of the operation identifiers are provided by the protection functions. For
example, the ‘OC1-OPT-A’ operation identifier is used to identify the pickup in the
first element of the overcurrent function (OC1) in phase-A. See respective
protection functions in Chapter Relay application .
‡Note: 64 logical signals are selectable for recording. For example in this purpose, the
user may choose an operation signal on the circuits of the BIO modules (BIOs).
(iv) FL calculation result
The location of the fault occurrence is recoded if the fault locator function (FL) operates.
(v) Evolving faults
The fault recorder is able to record evolving faults† during the operation of the ARC function.
Strikes number for reclosing CB is also recorded.
†Note: The evolving faults are found during the ‘ARC_IN_PROG’ signal being generating.
For more information, see Chapter Relay application: Autoreclose .
(vi) Fault quantities and pre-fault-quantities
Several quantity items (amplitude and phase angle of current, etc.) are memorized in the fault
recorder, as exemplified in Table 8.1-1 (for ‘VCT12B’ designed for 1CB†) and Table 8.1-2 (for
‘VCT11B’ designed for 1.5CB†). Quantities just before the fault are also memorized. The pre-
fault quantities are captured 10 seconds before tripping, but it is possible to take back longer
using the setting [Pre-Fault time].
†Note: For more information about the VCT construction, see Chapter Technical
description: Transformer module for AC analog input .
Table 8.1-1 Recording quantities for 1CB arrangement
Abbreviations
Displayed quantities
I
a
, I
b
, I
c
,
I
ab
, I
bc
, I
ca
,
I
e
(2)
I
1
, I
2
, I
0
(1)
Current in phase, phase-to-phase , symmetrical, residual currents
I
em
(2)
Residual current in the other side of the parallel line
V
a
, V
b
, V
c
V
ab
, V
bc
, V
ca
V
1
, V
2
, V
0
(1)
Voltage in phase, phase-to-phase, and symmetrical
V
s
, V
s2
One or two reference (busbar) voltages
I
a
–L, I
b
–L, I
c
–L, I
e
–L
I
a
–R1, I
b
–R1, I
c
–R1, I
e
–R1
Resultant currents and voltages at local-end (L) and remote-ends (R1 and R2)