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The question is "find the per-phase capacitance needed to change the power factor to 1.0."
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I'm too lazy to post up the entire solution, but basically the total 3-phase reactive power needed to correct power factor to 1 is 57.8kVAR. The solution then divide it by 3 since we are looking for per phase capacitance value.
I understand the solution, but I assume the capacitance for the power factor correction is placed on the transformer secondary (between the transformer and the motor loads) which mean it's a wye connection. Therefore, the capacitance calculation on the last line of the solution should taking into account the voltage divided by square root of 3, right? The solution just used V^2 and not (V/1.73)^2.
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