Overload Relay

An overload relay is a critical safety device used in electrical systems to protect motors and other equipment from damage caused by excessive current or overheating. It operates by monitoring the current flowing to the motor and automatically disconnecting the power supply if the current exceeds a predetermined safe level for a specific duration. This helps prevent issues such as motor burnout, wiring damage, and potential fire hazards. Overload relays are typically used in conjunction with contactors in motor control circuits, where they provide protection by tripping the circuit when an overload condition is detected. There are different types of overload relays, including thermal overload relays, which use heat-sensitive elements to detect excessive current, and electronic overload relays, which offer more precise and adjustable protection through electronic sensing. Properly selected and installed overload relays are essential for ensuring the longevity and reliable operation of motors, as well as for maintaining overall electrical system safety.