Compressors have large in-rush currents and therefore rely on a start relay, commonly called a?

Compressors in air conditioning and refrigeration systems typically draw a significantly higher current when they start up compared to their running current. This initial surge in electricity, known as in-rush current, requires a mechanism to manage and control the start-up process to prevent potential damage to the system and ensure reliable operation.

A potential relay is specifically designed for this purpose. It operates based on the voltage present in the circuit. When the compressor starts, the potential relay closes an electrical circuit to allow current to flow to the start winding of the compressor. Once the compressor reaches an appropriate speed and the voltage stabilizes, the relay opens, disconnecting the start winding and allowing the compressor to continue running on its main winding. This effective management of the starting current not only protects the compressor but also enhances its longevity and efficiency.

In contrast, other options do not adequately address the role of the relay in managing in-rush currents. A typical Bosch relay may not be suitable for all compressors as each manufacturer may have different specifications and requirements, hence the mention of unique relays. Additionally, suggesting that capacitors alone handle the load overlooks the necessity of a relay to ensure that the initial surge is managed properly. The use of a potential relay is thus essential for effectively handling the