EDR-5000 IM02602007E
All ground current protective elements can be planned user defined as non-directional or as directional stages. This
means, for instance, all elements can be projected in forward/reverse direction.
For each element the following characteristics are available:
•DEFT (definite time).
For tripping curves please refer to “Instantaneous Current Curves (Ground Current Calculated)” located in the
Appendix.
The ground current can be measured either directly via a zero sequence transformer or detected by a residual
connection. The ground current can alternatively be calculated from the phase currents. However, this is only possible
if the current transformers are Wye-connected.
www.eaton.com 513
To Next Page
Loading...
