## Wave-form of current and the power factor in the primary of a transformer supplying a mercury-vapour rectifier |

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ain nx dx alternating-current assume the maximum axis that instant Bioos coefficients as determined connected in Y-star constant term current wave current wave-form curve determining the coefficients direotlon dx sin x effective value ELECTRICAL ENGINEERING electromotive force equal to sero factor computation fier transformer connected flow through Pi following formulae following table gives ft ft TOl further assume gives the value h TOl Harmonic analysis Increasing positively Let the series Let us further Let us take line current maximum value Mercury arc rectifiers negative direction negleot obtain the following ooa x dx ooe nx dx oonverter ourrent will flow ourrent will pass Power-factor computation primary coil primary side primary winding Pi rectifier transformer connected secondary winding sero and increasing shown in Fig shows the current star voltage supply lines transformer supplying unity voltage is sero whioh xp xu