Question
Download Solution PDFTransformer are rated in kVA instead of kW because
This question was previously asked in
UKPSC JE Electrical 2013 Official Paper I (Held on 7 Nov 2015)
Answer (Detailed Solution Below)
Option 4 : All of the above
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UKPSC JE CE Full Test 1 (Paper I)
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Detailed Solution
Download Solution PDFReason for kVA rating of Transformer:
Reason 1:
- The losses in a transformer include copper losses and core losses or iron losses. Core losses depend on voltage whereas copper losses depend on the current which passes through transformer winding.
- The total losses depend on volt-ampere.
Reason 2:
- When the transformer is designed the manufacturer does not know which type of load will be connected in the future. And the power factor depends upon the load.
- Since kVA is fixed and kW depends on the power factor.
Hence, the rating of the transformer is mentioned in kVA but not in kW
Last updated on Mar 26, 2025
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