USCG Exam PracticeMotors and generators
A three-phase squirrel-cage induction motor draws approximately how many times its full-load current at the moment of starting?
- A. 1 to 2 times full-load current
- B. 2 to 3 times full-load current
- ✓ 5 to 7 times full-load currentCorrect
- D. 10 to 12 times full-load current
Why C is correct
NEETS Mod. 5 §4-1 states that induction motors draw a large starting inrush of 5 to 7 times full-load current at low power factor because at standstill they behave like a short-circuited transformer. This is why reduced-voltage or soft starters are used on larger motors.
Cited:NEETS Mod. 5 §4-1