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sanchayita

It\'s a factor of 3. The easiest way to confirm is by checking the power. Let Vline-line = 1 Volts. (This means Vline-neutral = 1/sqrt(3) V) Let Zcap,wye = 1 ohm Choose freq = 1/(2pi) Hz, so w = 1 radian/second C,wye = 1/(w*Zcap,wye) = 1 F Total Power = (Vline-line)^2/Zcap,wye = 1 VAR Let\'s guess that impedance in delta is 3x impedance in wye. Zcap,delta = 3 ohm C,delta = 1/(w*Zcap,delta) = 1/3 F Check Power: Power in each line-line branch = (Vline-line)^2/ Zcap,delta = 1/3 VAR Total Power = 3 * 1/3 VAR = 1 VAR So, to convert from wye to delta, multiply impedance by 3. But, in a capacitor, impedance is inversely proportional to capacitance, so be sure to invert the 3!