Toshiba GR200 Series Instruction Manual page 267

Overvoltage protection for phase-to-phase (OVS)
The over voltage protection function in phase-to-phase (OVS) detects an over voltage condition
that phase-to-neutral voltage is larger than a setting and operates accordingly. The OVS
function has two stages (elements; OVS1 and OVS2), which operate independently. The OVS
element has a time delay characteristic; and the user can select either (1) independent
(definite) time characteristic delay or (2) dependent (inverse) time characteristic delay. The
OVS element is configured both the setting of a pickup voltage (PU) and the setting of a drop-
off voltage (DO).
To simplify the description, only OVS1 is discussed, but the expression is applicable to
OVS2; hence, read the expression for OVS1 as the OVS2 stage unless a special explanation or
instruction has been provided.
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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 2.13-1 Comparative table in respective ordering numbers
✓: Applicable
Sec. Feature
– Main features
NA: Not applicable
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Ordering No. at "G&T"
31 32
✓ ✓
6F2S1915 (0.46)
Appendix: Ordering
.
GRZ200 (Soft 031 & 032)