The horsepower rating of three-phase motors and the KVA (kilo-volt-amp) rating of three-phase transformers is about ____% greater than for single-phase motors or transformers with a similar frame size.
A) 50
B) 100
C) 150
D) 200

Question

Quizplus · Accepted Answer

The horsepower rating of three-phase motors and the KVA rating of three-phase transformers is approximately 150% greater than for single-phase motors or transformers with a similar frame size. This is due to the fact that three-phase power is more efficient and balanced than single-phase power, allowing for higher power output from the same physical size. Therefore, option C is the correct answer.

The Horsepower Rating of Three-Phase Motors and the KVA (Kilo-Volt-Amp)