Question

An unbalanced, three-phase, three-wire, star-connected load is supplied from a balanced three-phase source at 380 V,50 Hz. The phase sequence impedances of the load are the following:  

Z_a =17.5 ∠ - 34.2°Ω ;               Z_b=13.9 ∠ 68.15° Ω  ;               Z_c =14.2 ∠ - 49.7° Ω 

Take E_ab as a reference, with a phase sequence of ACB.

   

Use Millman’s theorem and determine the phase voltage (I_c) of the load in polar form.

Answer 1

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