Get Why Transformer Rating In Kva Instead Of Kw Images

Get Why Transformer Rating In Kva Instead Of Kw Images. A transformer has two types of power loss, copper loss, and iron loss. Transformers are rated in va or kva.

Why Transformer Rating In Kva Not In Kw Electrical Idea from i1.wp.com

In the case of alternator and transformers manufacturer does not know the operating power factor. Hence they are rated in kva or mva. The transformer and alternator are designed on the basis of apparent power(kva).the power factor at the incoming supply side of the transformer depends on the types of loads.

So, he can not give the rating in kw (as power factor cosɸ is needed to find power rating in watts).

The transformer and alternator are designed on the basis of apparent power(kva).the power factor at the incoming supply side of the transformer depends on the types of loads. The transformer and alternator are designed on the basis of apparent power(kva).the power factor at the incoming supply side of the transformer depends on the types of loads. Transformer power is given by p=v*i which takes the unit of kva while that of kw has energy term which is not produced by the transformer.it only steps up or down the voltage.answer:in a pure d.c. In the case of the transformer and generator, the designer.

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This is the only correct reason for this question.

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Iron losses or core losses or insulation losses copper losses ( i²r)depends on current which passing through transformer winding while iron losses or core losses or insulation losses depends on voltage.

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Comparison between electric vehicle and internal combustion(ic) vehicle;

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However, it is not pragmatic to operate the transformer at particular power factor or at particular kvar because the load power factor varies and the system power factor changes with variation in power factor of the connected loads.

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Comparison between electric vehicle and internal combustion(ic) vehicle;

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(i.e it is resistive, reactive, r, rl, rc, rlc or of any other type).

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From the above example, it is clear that the rating of transformer is same (11kva) but different output in power (11kw and 6.6kw) due to different power factor values after connecting different kind of load which is not predictable for transformer manufactures where the losses are same in both cases.

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We know that transformer rating may be expressed in kva as well as generator and alternator rated in kva designer doesn't know the actual consumer power factor while manufacturing transformers and generators i.e.

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These are the three reasons why transformer is rated in kva.