What are the technical reasons for soaking transformers for
various times before allowing them to pick load after a
fault ?

Answers were Sorted based on User's Feedback



What are the technical reasons for soaking transformers for various times before allowing them to ..

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

Is This Answer Correct ?    25 Yes 8 No

What are the technical reasons for soaking transformers for various times before allowing them to ..

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

Is This Answer Correct ?    15 Yes 15 No

What are the technical reasons for soaking transformers for various times before allowing them to ..

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.

Is This Answer Correct ?    0 Yes 3 No

What are the technical reasons for soaking transformers for various times before allowing them to ..

Answer / j.kesavan

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

Is This Answer Correct ?    0 Yes 30 No

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