How to conduct preventive testing of transformers?

Transformer preventive testing To ensure the normal operation of the power transformer, technicians should inspect it at least once a day. Before disassembly, they should fully understand the function, location, connection method and relationship with other surrounding devices of each electrical component. In the case of assembly drawings, you should draw a sketch while taking it apart.

And write down the symbols. You should first check whether there are obvious cracks or defects in the equipment. When the insulation material of the equipment is exposed to high voltage, the contact resistance increases. Then open the high-voltage isolation knife, and then check whether the casing, porcelain bottles and leads are deformed or damaged. It should be replaced to see if the oil level is normal. If there is oil leakage, the rubber gasket should be replaced to check whether the silicone is effective. If there is discoloration or serious failure, it should be replaced.

It should be replaced immediately. There is noise in the dry-type transformer. If the sound of the transformer is normal and there is noise, but the current and voltage are not abnormal, it may be that the clamp or the screw holding down the core is loose, causing the silicon steel sheet to oscillate. The dry-type transformer There is discharge sound. If partial discharge occurs in the transformer or surface, the sound will be mixed with "crackling" discharge sound.