Tag: Starters

How solid-state soft starting of Induction motors is done

Solid-state soft starting is the most commonly used technique for starting induction motors. It provides a smooth build-up of current and torque; the maximum current and acceleration time are easily adjusted. The only problem with this technique over conventional starters … Read more

Direct-on-line (DOL) Starter

Let’s consider an illustration of a typical three-phase direct-on-line (DOL) starter below:

Direct-on-line (DOL) starter
Figure 1 Three-phase direct-on-line starter

When the start button is pressed, the 415V contactor coil is energized, the main and auxiliary contacts close, and the motor starts. The … Read more