Device for disconnection of line with ground fault in network with insulated neutral

For power lines with insulated neutral a single-phase earth faults are not emergency, but they are potentially dangerous for people and animals and can lead to the development of an accident into phase-to-phase short circuits. The purpose of paper is to develop and research devices that selectively protect against earth faults in electrical power line with low earth fault currents. As a result, a device for disconnecting a line with an earth fault in power line with insulated neutral has been developed. In power lines with insulated neutral 6...35 kV at electrical substations, it is offered to use this device in order to provide automatic selection and disconnection of only the line on which the short circuit occurred.