Toshiba GR-200-5 Instruction Manual page 196

6F2T0207 (0.01)
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 four stages (elements; OVS1, OVS2, OVS3, and OVS4), 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
other OVSs; hence, read the expression for OVS1 as the other stages unless a special
explanation or instruction has been provided.
GRE200 (5,6)
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