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Step up and step down transformers are always rated but unlike bulbs, their power rating is always given in kVA whereas bulbs are rated in watts. Why is it so? Is their any specific reason to this?

asked Jun 17, 2019 in Electrical by Elec_nerd | 29 views

1 Answer

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It is because losses in transformer depends on voltage and current that is V and I and not not power factor.

i.e. KVA= K * voltage * current

Watt= cosø 

Hence rating of transformer is given in KVA and not in watt

answered Jun 18, 2019 by Shubham vaidya