I would like to thank all of you who replied to this request and gave your valuable experiences, opinions, or other help, all of which are being considered in order to effect improvement to the existing situation.
In our electric utility we have been using Sensitive Earth Fault (SEF) relays for the protection of the 11 kV overhead distribution lines, and they are set for operation at 6 Amps and 5 seconds time delay.
Their purpose is to detect fallen conductors of o/h lines. We provide this protection...
