Which type of starter is known for providing more reduction of line current than any other reduced voltage starting method?

Autotransformer starters are designed to provide a significant reduction in line current during the start-up phase of an electric motor. This specific type of reduced voltage starting method works by using an autotransformer to lower the voltage supplied to the motor at startup. The voltage can be adjusted based on the tap settings on the autotransformer, allowing for a more controlled and gradual increase in voltage and, consequently, a reduction in starting current.

This method is particularly effective for large motors where high starting currents can cause damage to the electrical system and the motor itself. By reducing the starting current significantly more than other methods, such as primary resistor starters or closed transition starters, autotransformer starters help improve the overall efficiency and safety of motor operations. The benefit of reduced starting current leads to less mechanical stress and lowers the risk of tripping circuit breakers, contributing to a smoother start and a longer lifespan of the motor and its associated components.