What is the function of an under-voltage relay?

The function of an under-voltage relay is specifically designed to monitor voltage levels within an electrical system. When the voltage drops below a predetermined threshold, the under-voltage relay reacts by disconnecting the load. This protective measure is crucial for preventing damage to electrical equipment that can occur if the voltage falls below safe operating levels, potentially leading to overheating or inadequate performance.

Monitoring voltage levels helps ensure that devices or components operate efficiently and safely, and disconnection at low voltage helps prevent further issues that could arise from enervated equipment attempting to operate under such conditions. This is especially important in industrial and commercial settings where sensitive machinery relies on stable voltage to function correctly.