A three-phase, Y-connected load draws current containing the following Fourier harmonics (all rms amperes) in each line:

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A three-phase, Y-connected load draws current containing the following Fourier harmonics (all rms amperes) in each line:

Order h Ihrms (A) 1 50 3 30 5 20 7 9 15 11 11 13 9 7 15 6

Determine 

(1) The total (true) rms value of the current,

(2) The THD based on the fundamental current, 

(3) The true THDT as defined in some international standards, and 

(4) The current in the neutral conductor.

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