The power frequency withstand voltage test is a key item in transformer testing and a basic measure for evaluating the dielectric strength of the main insulation. Conduct a power frequency AC test voltage exceeding a certain multiple of the rated voltage on the transformer winding and bushing, and conduct a 1-minute AC withstand voltage test. The purpose is to test the insulation level of transformer windings under conditions that are more severe than operating conditions.
The AC withstand voltage test is a destructive test. Therefore, it must be carried out on the basis of all other insulation tests being qualified to avoid unnecessary insulation breakdown and damage accidents.
The insulation of the transformer winding can only be put into operation after passing the AC withstand voltage test.
The power frequency withstand voltage test device consists of a test transformer and a withstand voltage test bench. Can be used for transformer withstand voltage test, cable withstand voltage test, and other electrical equipment withstand voltage and insulation tests. The power frequency withstand voltage test device is an intelligent withstand voltage test equipment designed according to the standards of the power industry. Used to test the insulation strength of various electrical products, components, insulation materials, etc. under specified voltage, in order to evaluate the insulation level of the product. The insulation defect of the tested product is an indicator of its overvoltage capability. Widely used in the electrical manufacturing and power operation departments.
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