Prevent to exchange novel insulating detection device who scurries into

The utility model discloses a prevent to exchange novel insulating detection device who scurries into relates to electric power and detects technical field, direct current system is the system that provides power supply for the protection, and it is one of major failure of impact systems characteristic that alternating current signal scurries into direct current system, can directly lead to unwanted operation of protection, influences direct current system's stability and reliability. The utility model discloses an insulator arrangement host computer and feeder return circuit unit, can detect0V and scurry into the trouble to various alternating current signal within the 285V, the branch road of scurrying into alternating current signal carries out the route selection location to accordingto alternating current signal's voltage effective value size, the first relay of automatic disconnection cuts off the return circuit that takes place alternating current signal and scurry into the trouble, prevents that it sc