In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
Correct answer: D. 120°
- A. 0°
- B. 60°
- C. 90°
- D. 120°
Explanation
A dynamometer three-phase power-factor meter uses two moving-coil systems positioned with their planes 120° apart. This angular displacement corresponds to the phase relationships needed to obtain the three-phase power-factor indication.
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