What type of motor starter should be used for high starting torque applications?

For high starting torque applications, the star-delta starter is an ideal choice due to its ability to provide a high initial torque while effectively managing the inrush current associated with starting a motor. In the star-delta starting method, the motor initially operates in a star configuration, which reduces the voltage and current flowing to the motor, helping to limit the initial starting current. Once the motor reaches a certain speed, it switches to the delta configuration, allowing it to operate at full voltage and produce the full torque required for the application.

This transitioning reduces mechanical stress on the motor and connected equipment, while still allowing for adequate torque to overcome static loads. For applications such as conveyor belts, crushers, or high-inertia loads, the star-delta starter can provide the necessary torque to get the load moving without causing undue stress on the electrical system.

In contrast, while other starter types may be suitable for specific scenarios, they do not offer the same combination of initial torque management and reduced starting current as a star-delta starter when high torque is required.