Toshiba GR200 Series Instruction Manual page 498

Voltage check for autoreclose (VCHK)
The voltage-check-for-autoreclose (VCHK) function is used along with the function of
autoreclose (ARC), as Bus-bar between Lines requires the restoration of service after the
clearance of fault.
The ARC covers two breaker systems: single breaker system (1CB) and single-and-a-half
breaker system (1.5CB), and the ARC has two scheme logics: one scheme logic (ARC1) is for
1CB and for Bus-bar CB of 1.5CB, and another scheme logic (ARC2) is for Center CB of 1.5CB.
Thus, the VCHK consist of two scheme logics (VCHK1 and VCHK2), and VCHK1 is applied to
ARC1; on the other hand, VCHK2 is used for ARC2.
Bus-bar
a. Single breaker on system (1CB)
Figure 2.35-1 Single breaker and double breakers on the system
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Note: 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
Table 2.35-1 Comparative table in respective ordering numbers
Voltage check for Auto-reclosing
VCHK
✓: Applicable
CB (CB#1)
Line
ARC1 with
VCHK1
feature
NA: Not applicable
Bus-bar
CB#1(Busbar CB)
ARC1 with
VCHK1
CB#2(Center CB)
ARC2 with
VCHK2
b. One-and-a-half breaker on system (1.5CB)
Appendix: Ordering
.
- 475 -
6F2S1914 (0.49)
Line
Line2
Ordering No. at "G&T"
33 37
✓
✓
GRL200 (Soft 033 & 037)