When the transformer is in normal operation, it will emit a continuous and even “click” sound. If the generated sound is uneven or there are other special sounds, it should be regarded as abnormal operation of the transformer, and the fault can be found according to the…

       First, the cause of inaccurate grounding resistance detection or unstable indication or even negative value        Because the grounding resistance detector is composed of many sophisticated electronic components, it has a long detection line. Under the influence of bad environment and operation, it often causes…

2, 102 electronic meter to measure the grounding body, when the water penetrates the contact voltage and current pole, the contact resistance due to poor contact is large, which affects the measured true value. This method is only used when there is no place to insert voltage and current poles,…

      There are the following types of insulation tests: design test, production test, handover acceptance test, preventive maintenance test, and fault location test. Different test types depend on different test purposes and application areas, and different insulation test procedures have different characteristics. And we can also see that using…

       With the development of the national economy and the increase of the power supply voltage level of the city network, the XLPE insulated power cable (XLPE) has been acquired at home and abroad for its reasonable process and structure, excellent electrical performance and safe and reliable operation…

      For electrical equipment, especially high-voltage electrical equipment, insulation performance tests shall be carried out after a period of time or operation. Detect its electrical insulation properties. In accordance with the provisions of the International "Procedures for Preventive Testing of Electrical Equipment":       1. The phase-separated…

       For electrical equipment, especially high-voltage electrical equipment, insulation performance tests shall be carried out after a period of time or operation. Detect its electrical insulation properties. In accordance with the provisions of the International "Procedures for Preventive Testing of Electrical Equipment":       1. The phase-separated insulation…

       In the supply and supply of electricity, the current varies greatly, ranging from a few amps to tens of thousands of amps. In order to facilitate the measurement of instruments and meters, it is necessary to convert to a relatively uniform current, and the voltage on the…

         Power System Many high-current electrical equipment requires accurate measurement of the resistance of the circuit during preventive testing and handover tests. The circuit breaker is an important electrical equipment for the power system. The national standard GB763, GB50150 and the power industry standard DL/T596 have specified…

        Transformers are used in almost all electronic products. The principle is simple, but depending on the application (different applications), the winding process of the transformer will have different requirements. The functions of the transformer mainly include: voltage conversion; impedance transformation; isolation; voltage regulation (magnetic saturation transformer),…