50R Deft Calculated Ground Fault Protection Module - Eaton EDR 3000 Installation, Operation And Maintenance Manual

50R DEFT Calculated Ground Fault Protection Module

Elements
50R[1] ,50R[2]
For each element, the following characteristics are available:
DEFT (definite time).
•
For tripping curves please refer to the "Appendix/Instantaneous Current Curves (Ground Current Calculated)" section.
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.
If using inrush blockings, the tripping delay of the ground current protection
functions must be at least 30 ms or more in order to prevent faulty trippings.
All ground current elements are identically structured.
EDR-3000
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