Toshiba GR-200-5 Instruction Manual page 60

6F2T0207 (0.01)
Earth fault protection (EF)
The earth fault protection (EF) function has four stages (elements); each element can have
either a directional characteristic or non-directional characteristic.
To simplify the description, only EF1 is discussed but is applicable to the other EFs; hence,
read the expression for EF1 as EF2, EF3 and EF4 at each EF stage unless a special explanation
or instruction has been provided.
GRE200 (5,6)
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