What is the role of resistors or inductors in line impedance starters?

The correct choice revolves around the fundamental purpose of resistors or inductors within line impedance starters. These components are crucial for reducing the starting current when an electric motor is initiated.

When a motor starts, it typically draws a much higher current than during normal operation. This inrush current can be several times greater than the motor’s rated current, potentially damaging the motor and causing voltage drops in the supply that can affect other equipment.

By incorporating resistors or inductors, the line impedance starter effectively limits this initial surge of electrical current. Resistors dissipate energy as heat, thereby lowering the amount of current flowing to the motor during startup. Inductors, on the other hand, utilize electromagnetic principles to create opposition to changes in current, which also results in lower starting current.

By managing the starting current, the line impedance starter protects the motor and associated electrical systems from damage, ensuring a smoother and safer startup process. This is essential for maintaining longevity and reliability in motor operations.