Answer / al kafaah

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
insulations, 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 Switchgears and Cables which are
other Primary circuit components are tested with High
voltage even at site

Answer / japjeev

The soaking process is to determine the sufficiency of the
cooling oil for continuous operation under temperature and
duty cycles.

If an outage occurs placing heavy load currents on a
transformer it must be assured that it will survive without
exploding, melt-down, etc

Answer / larry dorich

Soaking a transformer before putting a load on it is Definitely old school. Transformer Mfg.'s recommended energizing with voltage even at 50% of rated Voltage @ 50/60 Hz for 24 hours .The 60 Hz allowed the oil to saturate all the paper insulation in the windings. With out doing this the paper would burn @ full load which really would de rate the Transformer & contaminate the oil.

Answer / j.kesavan

sorry friend, soaking trs we are using in vsd drives why we
want to reduce the hormonics in power system.

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