why HT line voltage is multiple of 11.eg11kva,33kva,132kva

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why HT line voltage is multiple of 11.eg11kva,33kva,132kva..

Answer / x

its because form factor of sine wave will be 1.11 alla
voltages will be multiples of 11

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why HT line voltage is multiple of 11.eg11kva,33kva,132kva..

Answer / raja

Generally the maximum voltage is specified as residual
voltage which is specified as 1.11 * Vrms , so it is coming
in the multiple of 11

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