Toshiba GR200 Series Instruction Manual page 399

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 2.25-1 Single breaker and double breakers on the system
As discussed above, the implementation of VCHK is subjected to the ARC. Thus, the
setting of VCHK should be in corresponding to the setting of the ARC. The ARC is discussed
separately. (See Chapter
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Note: The implementation of particular features is dependent upon the selection of
hardware and the configuration of functions. Several IED models do not support certain
features. To determine whether a particular feature has been implemented within an IED,
identify the IED ordering number; and check the order number for the "G&T position" whilst
referring to the comparison table below. For more information, see
Table 2.25-1 Comparative table in respective ordering numbers
✓: Applicable
CB (CB#1)
Line
ARC1 with
VCHK1
Relay application
Sec. Feature
– Main features
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)
Autoreclose function
:
Ordering No. at "G&T"
31 32
✓ ✓
- 378 -
6F2S1915 (0.46)
Line
Line2
)
Appendix: Ordering
GRZ200 (Soft 031 & 032)
.