Answer / sunil

because of form factor 1.11

Answer / iamdon

Dear Kamlesh, would you elaborate what convenience we get
by choosing the multiple of 11.

Answer / jeganmohan

due to form factor:
sine wave= RMS/ARV;
RMS=a/root2;
ARV=pi/2root2;
it implies 1.11

Answer / kamales maiti

voltage can be selected for other class also for
transmission, but for standarisation & convenience for
calculations, multiple of 11 is being used.

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