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Three phase circuits

The line curr...

Question

The line current of a three-phase four wire system are square wave with amplitude of 100 A. The three currents are phase shifted by $120^{o}$ with respect to each other. The rms value of neutral current is

A

300 A

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B

0 A

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C

100 A

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D

\frac{100}{\sqrt{3}} A

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Solution

The correct option is C 100 A

$I_{N} = I_{a} + I_{b} + I_{c}$

$(I_{N})_{r m s} = 100 A$

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