Get Why Transformer Rating In Kva Not In Kw Quora PNG. As the name suggest, transformer only transfer the power from one circuit to another without changing the value of power and frequency. It can be noted that all those electric loads such as motors, lamps, heaters etc.
Why Do We Use Kva Instead Of Kw To Rate Alternators And Transformers Quora from qph.fs.quoracdn.net So the cu losses depend on the rating current of the load so the load type will determine the powerfactor p.f , thats why the rating of transformer in kva,not in kw. Transformer always rated in kva instead of kw. Why is transformer rating defined in kva?
That is why the transformer rating can be expressed in wa or kva, not in w or kw.
For example, a transformer working on rated voltage and rated current with load power factor equal to zero has rated losses and rated kva output but delivers zero power to the load. It can be noted that all those electric loads such as motors, lamps, heaters etc. Why are transformers rated in kva and not in kw? 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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