Red Seal Electrician Practice
Power factor and three-phaseQuestion 1064 of 1506

In a delta-delta system, what voltage does each load phase receive when the loads create triplen harmonics?

  1. A voltage with strong triplen harmonics
  2. Almost a pure sine wave
  3. Zero voltage
  4. A DC voltage
Show answer

Correct answer: Almost a pure sine wave

Each load phase is directly across a source phase, so the load voltage follows the source.

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

Practice power factor and three-phase

Questions last reviewed: 18 October 2026