Switch Gear and Transformer Soaking Test

What are the technical reasons for Soaking Test in Transformer and Switch Gear?

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ali raza

  • May 26th, 2016

I think the transformers are soaked with normal operating voltage level as testing with HV of the transformer insulation, winding at site is impractical as well not economical. Besides soaking allows the transformer insulation to be tested for operating voltage such as oil (so that oil inside is not breaking down) or winding insulation, short circuits, inter-turn faults (though these items are individually tested for its correctness at site test, but not as a whole unit at Normal operating voltage). Whereas the Switch-gears and Cables which are other Primary circuit components are tested with High voltage even at site.

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