What is one function of an electronic soft starter?

An electronic soft starter plays a crucial role in managing the starting process of an electric motor. The primary function of a soft starter is to limit the starting voltage, which in turn reduces the starting current drawn by the motor. This is important because electric motors can draw a significant amount of current when starting from a standstill, often several times their full load current. By controlling the voltage applied during startup, the soft starter effectively manages the inrush current, preventing potential damage to the motor and minimizing stress on the electrical supply system.

This controlled ramp-up of voltage allows the motor to accelerate smoothly, reducing mechanical stress on both the motor and connected machinery. It also helps in decreasing voltage dips in the electrical supply, which can impact other equipment and systems connected to the same power source.

The other options highlight different functions that do not align with the purpose of a soft starter. For instance, increasing voltage to improve performance is not a characteristic of a soft starter, as it aims to reduce voltage at startup rather than enhance it. Similarly, while preventing overload is critical for overall motor protection, it's not a direct function of the soft starter itself, which focuses more on managing the starting current and smooth acceleration. Lastly, infinite speed control is beyond the capabilities of a soft