Rapid DC insulation detection module for nuclear power plant

The utility model belongs to the technical field of nuclear power plant DC insulation monitoring, and specifically relates to a rapid DC insulation detection module for a nuclear power plant. The circuit comprises a 16-channel input end, a signal input interface circuit, 16 filtering and amplifying circuits, 16 voltage conversion circuits and a single-chip microcomputer. When the insulation monitor host detects a bus grounding fault; starting branch line selection function, the insulation monitor host injects a 4Hz low-frequency sinusoidal voltage signal into the bus; signals of the 16 branchCT current transformers enter the 16-channel input end at the same time and enter the 16 filtering and amplifying circuits through the signal input interface circuit respectively, the 16 filtering andamplifying circuits are connected with the 16 voltage conversion circuits respectively, and the 16 voltage conversion circuits are connected into the single-chip microcomputer. According to the utility model, the total insula