Toshiba GR-200 Series Instruction Manual page 35

6F2T0200 (0.15)
Overcurrent protection (OC)
The phase overcurrent (OC) protection is the major protection function and has both time
characteristic and directional elements. Four stages (elements) are available in the OC
protection. The user can select various features using the scheme switches provided. The
elements are named OC1, OC2, OC3, and OC4; and they operate independently.
To simplify the description, only OC1 is discussed but is applicable to the other OCs;
hence, read the expression for OC1 as OC2, OC3, and OC4 at each stage unless a special
explanation or instruction has been provided.
GRE200 (1,2)
- 16 -