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Network TheoryThree-Phase Circuits

A balanced three-phase load operates at VL = 400 V, IL = 10 A and unity power factor. Its total real power is closest to?

  • A2.31 kW
  • B4.00 kW
  • C6.93 kW
  • D12.0 kW
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Correct Answer: C. 6.93 kW
Explanation: P=√3×400×10×1 ≈ 6928 W = 6.93 kW.
Reference: Standard network theory: three-phase circuits
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