Toshiba GR200 Series - 2.13.4 Coordination with DISCAR protection; (i) DISCAR and DEFCAR signals being separated; (ii) DISCAR and DEFCAR signals being shared

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 210 -
≥1
8000001B79
8100001B7A
8200001B7B
800000EB55 DEFCAR_F.BLOCK
810000EB56 DEFCAR_PERMIT
≥1
1
&
&
8F00001B7C
DEFCAR-S
INT.DEFCAR-S-C
INT.DEFCAR-S-B
INT.DEFCAR-S-A
DEFCAR-OPT-C
DEFCAR-OPT-B
DEFCAR-OPT-A
1
&
1
&
1
&
TSBCT-DEF
t 0
t 0
t 0
&
&
&
DEF-REVBLK
BOP
DEFCAR
used for the
external carrier communication
used for the
integral carrier communication
Figure 2.13-10 Sending circuit of BOP
2.13.4 Coordination with DISCAR protection
The DEFCAR function, as rule, is used together with the distance carrier command protection
(DISCAR†); hence, the user is required to establish the coordination between the DEFCAR
function and the DISCAR function so that both can operate without interference. The
followings exemplify how to establish the coordination using the DEFCAR settings sand
signals.
†Note: For more information of the DISCAR, see chapter Relay application: Distance
carrier command protection .
(i) DISCAR and DEFCAR signals being separated
When the DISCAR signal and the DEFCAR signal are used separately, the user should set 0
for the [TDEFCF]. Consequently, the DEFCAR function can trip in TDEFC after the reception
of the DEFCAR signal. Figure 2.13-11 shows the relationship of sending-signal, receiving-
signal, and tripping in the DEFCAR function.
[TDEFC]
[TDEFCF]=0ms
BO Off delay
DEFCAR pickup
Sending DEFCAR signal
Receiving DEFCAR signal
DEFCAR issuing a trip signal
Communication delay
Figure 2.13-11 Sending signal and receiving signal in DEFCAR
Note: It is recommend prolonging DEFCAR signal.
(ii) DISCAR and DEFCAR signals being shared
When the DISCAR signal and the DEFCAR signal are used as a shared signal, the user should
set should set 0 for the [TDEFC]. Consequently, the DEFCAR function can issue a trip signal