Equipment for detecting earth leakage faults in insulated electrical distribution systems

摘要

Equipment for detecting earth leakage faults in insulated power distribution systems for high voltage with D/Y-connected network transformer. On the outputside of the transformer a measurement relay 23R,23S,23T is arranged between each phase and neutral with adjustable activating voltage for setting up an activation circuit to a signal relay 29 from the healthy phase in the event of the occurrence of earth leakage faults for transmitting a signal via the signal relay.