Question 262Electricity & Electronics - Assistant Engineer

The correct answer is C) Starting current is approximately 4.75 times the normal full load current value. This is correct because for a three-phase induction motor with a squirrel cage rotor, the starting current is typically 4 to 6 times the normal full load current value. This high starting current is due to the low resistance of the rotor winding when the motor is starting and the motor is drawing a large amount of current to overcome the initial torque required to start the load. The other options are incorrect because: A) Rated torque and current typically occur at around 80-85% slip, not 20%. B) The starting current is usually higher than 1.5 times the full load current. D) The pull-up torque is typically around 150-200% of the full load torque, not 20%.