Toshiba GR 200 Series, Instruction Manual

Page: 196 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 175 -
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.
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Note: The implementation of particular features is dependent upon the selection of
hardware and the configuration of functions. Several IED models do not support certain
features. To determine whether a particular feature has been implemented within an IED,
identify the IED ordering number; and check the order number for the “G&T position” whilst
referring to the comparison table below. For more information, see
Appendix: Ordering
.
Table 2.6-1 Comparative table in respective ordering numbers
Sec. Feature
Ordering No. at “G&T”
31 32
– DT characteristic
✓ ✓
– IDMT characteristic
✓ ✓
✓
: Applicable NA: Not applicable