The correct answer is D. high starting torque.
A repulsion start induction run motor is a type of electric motor that has two windings: a stator winding and a rotor winding. The stator winding is connected to an alternating current (AC) power source, and the rotor winding is not connected to any power source. When the stator winding is energized, it creates a magnetic field. This magnetic field induces a current in the rotor winding, which creates its own magnetic field. The interaction of these two magnetic fields causes the rotor to turn.
Repulsion start induction run motors are used in applications where a high starting torque is required. This type of motor is often used in cranes, hoists, and other heavy-duty equipment.
The other options are incorrect because:
- A. good power factor is not a characteristic of repulsion start induction run motors.
- B. high efficiency is not a characteristic of repulsion start induction run motors.
- C. minimum cost is not a characteristic of repulsion start induction run motors.