In the process of long-term operation of switchgear and ring main unit, due to many reasons such as equipment aging or improper use, large changes and discharges often occur. In most of the failures of switchgear and ring main unit, partial discharge accounts for the largest part. Part, it is necessary to find the partial discharge point in time, and then repair it, so how can we know whether there is partial discharge in the switchgear and ring main unit?

If you want to know whether partial discharge occurs in the switchgear and ring main unit, it is unrealistic to observe directly with the naked eye. It needs to be detected by equipment. The general partial discharge phenomenon can be detected by using a partial discharge tester. This equipment is mainly It is used to measure the partial discharge phenomenon of switch cabinets and ring mains cabinets. It has the characteristics of high accuracy, fast speed, and convenient use. It is very popular with the majority of power workers. This article will briefly introduce this equipment.

The handheld partial discharge tester is composed of the main tester, special partial discharge detection software, composite TEV sensor, ultrasonic sensor, high frequency current transformer, ultra high frequency sensor and connecting wire. Multi-level detection and frequency reduction technology is used to reduce the frequency of the discharge signal. At the same time, a high-speed AD conversion circuit is used to complete the digitization of the signal, and the reliability of the detected data is ensured by interference signal processing methods such as digital signal processing and adaptive filtering. By collecting different signals generated by internal partial discharges of different high-voltage equipment, the operating status of the equipment can be quickly charged. The instrument can be installed and tested in the operating state of the equipment, and has no impact on the normal operation of the equipment. It is convenient for the staff to evaluate the operating state of the switchgear in time, and greatly improves the reliability, safety and effectiveness of the equipment operation.

I want to know whether there is a partial discharge phenomenon in the switchgear and the ring main unit. It is actually very simple. Just use the instrument to test it. The key is to choose the right instrument and choose the right equipment to find the partial discharge point in time.