Which of the following is not a typical frequency rating for a power transformer?
A) 50 Hz
B) 60 Hz
C) 120 Hz
D) 400 Hz

Question

Quizplus · Accepted Answer

Power transformers are typically designed for standard power system frequencies, which are 50 Hz and 60 Hz in most parts of the world. Some specialized applications, such as aircraft and military equipment, use 400 Hz. However, 120 Hz is not a standard frequency for power transformers.

Which of the Following Is Not a Typical Frequency Rating