Partial discharge and temperature monitoring device for online fault indication, real-time temperature measurement, ring main unit, and distribution transformer partial discharge monitoring.

Summary：

       Partial discharge and temperature monitoring devices are installed on primary switchgear such as ring main units, cable distribution boxes, and pad-mounted transformers in the distribution network system. They are used for online monitoring of partial discharges, indicating short-circuit and ground faults in the corresponding cable sections, and providing real-time temperature monitoring.

       Pulse current method is a widely recognized and commonly used technique for measuring partial discharge quantities, with results expressed in apparent discharge quantities in picocoulombs (pC). This method provides quantitative measurements that objectively reflect the insulation status of electrical equipment. In various switchgear cabinets, those with voltage levels of 10kV and above are the most numerous in terms of installation and also have the highest number of failures, leading to severe consequences. Therefore, online monitoring of partial discharge and temperature rise in switchgear cabinets with voltage levels of 10kV and above not only helps understand the insulation condition of the equipment but also enables timely identification of many issues related to manufacturing and installation, determining the causes and severity of insulation faults.

       This device also integrates cable temperature monitoring, high-voltage live indication, and fault indication functions, combining measurement, analysis, and diagnosis. It uses a TFT color display interface, making it convenient for inspection personnel to judge the insulation status of switchgear, reducing maintenance costs; promptly addressing existing insulation hazards, and improving the reliability of distribution equipment operation.