Toshiba GR 200 Series, Instruction Manual

Page: 399 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 378 -
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 2.25-1 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
Relay application
:
Autoreclose function
)
─────────────────────────────────────────────────────────────────
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
Appendix: Ordering
.
Table 2.25-1 Comparative table in respective ordering numbers
Sec. Feature
Ordering No. at “G&T”
31 32
– Main features
✓ ✓
✓
: Applicable NA: Not applicable