Auto Transformer Starters

Auto transformer starters are used to start large three-phase induction motors. They are used in applications where the motor must be started at a low voltage and then gradually increased to the full voltage. This reduces the starting current and torque, which helps to protect the motor from damage. The auto transformer starter consists of a transformer with a tap on the primary winding, which is connected to the motor. The tap is adjusted to provide the desired starting voltage. The starter also includes a contactor to switch the motor on and off.