Detection system for poor closing state of isolating switch

The invention belongs to the field of power system equipment, and relates to a detection system for a poor closing state of an isolating switch. The detection system comprises an electric field sensor, a temperature sensor and a partial discharge sensor, wherein each sensor is connected with a computer host for acquisition and processing, and the host is provided with an indication signal output unit. According to the invention, three sensors are used to determine the poor closing state of an isolating switch, so that the judgement is accurate; the sensing signals of the three sensors are collected, processed and logically judged through the host, the system intelligently judges the state of the isolating switch according to detection results of the sensors, gives out the detection results and corresponding indications and sends out indication signals, a measurement and control system can be conveniently connected, and manual observation and intervention are not needed; and the system has the characteristics