A.V Wishtibeev - Power Networks Department, Siberian Power Engineering Centre, Novosibirsk, Russia

In article conceptual technique medium voltage networks protection against ground fault are considered. The following questions are considered: correct account of imbalance current, account (metering) of capacity current, choice of neutral grounding mode, algorithm of relay protection operate, calculation relay protection operate settings, estimation of the relay protection by The Least Resistance strategy.

Capacity Current, Estimation of Sensitivity,Ground Fault, Imbalance Current, Medium Voltage,Neutral Mode, Operate Settings, Overvoltages, RelayProtection, Transient Resistance