why voltage rating of transformers are in multiples of 1.1?

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why voltage rating of transformers are in multiples of 1.1?..

Answer / ruddho

usually for form factor.

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why voltage rating of transformers are in multiples of 1.1?..

Answer / sweetlimeforum

it has something to do with the form factor..well may
be...but really dont know how...!

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why voltage rating of transformers are in multiples of 1.1?..

Answer / firoz n

in trsfrmr emf eqn., rms value of voltag induced=fm fctor *avg value

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