Our country's power system implements a two-part electricity pricing system: in addition to collecting fees measured by measuring devices, basic electricity fees are also charged based on transformer capacity; For larger users, they also need to pay a one-time capacity increase fee when putting transformers into operation. With the development of the power industry and the increase in electricity consumption, self owned transformers and privately contracted transformers have gradually taken up a considerable share of distribution transformers. As a result, individuals have resorted to various fraudulent means (mainly changing transformer nameplates) in order to achieve the...

The instrument uses the internal fault frequency response analysis (FRA) method, which is currently being developed and improved in developed countries around the world, to accurately diagnose internal faults in transformers based on the measurement of characteristic parameters of the internal windings. After the completion of transformer design and manufacturing, its coil and internal structure are determined. Therefore, for a multi winding transformer coil, if the voltage level is the same and the winding method is the same, the corresponding parameters (Ci, Li) for each coil should be determined. Therefore, the frequency domain characteristic response of...

The scope of application is mainly used for conducting insulation strength tests on various electrical products, electrical components, insulation materials, etc. under specified voltages, to assess the insulation level of the products, discover insulation defects of the tested products, and measure the ability to withstand overvoltage. ▶ It is the preferred product for voltage withstand testing equipment required by departments related to power operation, electrical and appliance manufacturing enterprises, metallurgy, coal mines, electrified railways, scientific research institutions, and universities ▶ It is an essential testing equipment for power equipment inspection and preventive testing The YDJ (Z)...