2.7 Directional earth fault
protection I0φ> (67N)
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Setting groups
There are two settings groups available for each stage.
Switching between setting groups can be controlled by digital
inputs, virtual inputs (mimic display, communication, logic)
and manually.
Figure 2.7-1. Block diagram of the directional earth fault stages I
0
> and
I
0
>>
Figure 2.7-2. Operation characteristic of the directional earth fault
protection in Res or Cap mode. Res mode can be used with compensated
networks and Cap mode is used with ungrounded networks.
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