Five-part type terminal protective device of power distribution monitoring system

The invention relates to the technical filed of power distribution, in particular to a five-part type terminal protective device of a power distribution monitoring system, which comprises a multifunctional electrical apparatus release connecting circuit for protecting a multiloop air switch, a long time delay protective circuit, a short time delay protective circuit, an instant protective circuit, a zero-sequence protective circuit, a zone protective circuit, a voltage current sampling circuit, an incoming and outgoing line sampling circuit, a signal control sampling circuit and a power source modular circuit. The protective device of the invention has comprehensive functions, high cost performance, simple operation mode, high instantaneity, is convenient to use and maintain, and has a fix-part type protection function such as a long time delay protection function, a short time delay protection function, instant protection function, a zero-sequence protection function and a zone protection function, and wide