Star-delta motors are widely used on loads having high inertia and a ____________.
A)lagging power factor
B)reversing winding arrangement
C)40C rating
D)long acceleration period

Question

Quizplus · Accepted Answer

Star-delta motors are used on loads having high inertia and long acceleration period. This is because the star-delta starting method allows the motor to start with reduced voltage and current, which limits the initial torque and reduces the mechanical stress on the motor and the load. This reduces the risk of damage to the motor and the load during the starting period, especially when the load has high inertia and requires a long time to reach the rated speed. Star-delta motors are specifically designed for loads with high inertia and long acceleration periods. They are capable of providing a high starting torque while reducing the starting current drawn from the power supply. Therefore, option D is the best choice. The other options do not affect the selection of star-delta motors.

Star-Delta Motors Are Widely Used on Loads Having High Inertia