Toshiba GR-200 Series Instruction Manual page 186

6F2T0200 (0.15)
Overvoltage protection for phase-to-neutral (OV)
The over voltage protection function for phase (OV) detects an over voltage condition that
phase-to-neutral voltage is larger than a setting and operates accordingly. The OV function
has four stages (elements; OV1, OV2, OV3, and OV4), which operate independently. The OV
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 OV
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 OV1 is discussed, but the expression is applicable to
other OVs; hence, read the expression for OV1 as the other stages unless a special explanation
or instruction has been provided.
GRE200 (1,2)
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