Toshiba GR-200-5 Instruction Manual page 162

6F2T0207 (0.01)
Under-voltage protection for phase-to-natural (UV)
The under-voltage protection function for phase-to-earth (UV) consists of four stages
(elements) independently: UV1 to UV4. The time characteristic of the UV element is configured
either definite time (DT) or inverse definite minimum time (IDMT) using settings.
Each UV stage (element) detects the under-voltage condition of phase-to-earth. The user
can set a threshold and the ratio of a drip-out voltage (DO) to a pick-up voltage (PU) in the UV
element. To simplify the description, only the UV1 element is described, but the expression is
applicable to the other elements; hence, read the expression for the UV1 element as the others
unless a special explanation or instruction has been provided.
GRE200 (5,6)
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