Electrical mathQuestion 1059 of 1506

A balanced four-wire Y load draws 10 A of 3rd harmonic current in each phase. What is the 3rd harmonic current in the neutral?

10 A
0 A
17.3 A
30 A

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Correct answer: 30 A

Triplen currents are in phase, so they add: 10 + 10 + 10 = 30 A.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.7: Harmonics in Polyphase Power Systems

Questions last reviewed: 18 October 2026

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