Toshiba GR200 Series Instruction Manual page 208

Distance carrier command protection (DISCAR)
When every IED can exchange operational information mutually using communication system,
accurate decision of whether or not a fault is internal on the line can be made. Distance carrier
command protection (DISCAR) can provide such protection using the distance protection
(ZS/ZG). Consequently, the whole length of the line can be protected promptly for any fault.
The following techniques are provided in DISCAR:
1.
2.
3.
4.
The function of autoreclose (ARC) can be operated speedy using these protections above;
and these can issue either a single-pole trip signal or three-poles trip signal in accordance with
DISCAR settings and the states of faults.
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Note: Several IED models do not have carrier features. To determine whether the features
are implemented in the IED or not, locate the IED ordering number; and check the order
number at "G&T position" referring to the comparison table below. For more information, see
Appendix: Ordering
Table 2.12-1 Comparative table in respective ordering numbers
Distance carrier command protection
DISCAR
✓: Applicable
Permissive underreach protection (PUP)
Permissive overreach protection (POP)
Unblocking overreach protection (UOP)
Blocking overreach protection (BOP)
.
NA: Not applicable
feature
- 185 -
6F2S1914 (0.49)
Ordering No. at "G&T"
33 37
✓
✓
GRL200 (Soft 033 & 037)