Bjarney,
Thank you very much!. [Linked Image]
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where in medium-voltage [>2kV] faults it is intended to be sensed by and operate overcurrent-protective devices
I take it by this you mean, a system like Merz-Price(?) HV protection?.
When I was being trained up for Faults work, I was warned to keep my feet together, if I suspected that there may be a HV ground Fault, nearby, this was brought back to me recently, when I was training up a new Liney as a faultsman and he was leaping around(with his feet together) at a callout we were doing one night, I asked him why and he said, in case there was an Earth Fault!.
(Better to be safe than sorry, I suppose) [Linked Image]