Toshiba GR200 Series - 2.35 Voltage check for autoreclose (VCHK)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 475 -
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
Line
CB (CB#1)
Line
Line2
CB#1(Busbar CB)
CB#2(Center CB)
Bus-bar
b. One-and-a-half breaker on system (1.5CB)
a. Single breaker on system (1CB)
ARC1 with
VCHK1
ARC2 with
VCHK2
ARC1 with
VCHK1
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 Appendix: Ordering .
Table 2.35-1 Comparative table in respective ordering numbers
feature
Ordering No. at “G&T”
33
37
VCHK
Voltage check for Auto-reclosing
✓
✓
✓: Applicable NA: Not applicable