Relay Unit

A Relay unit is an electrically operated switch that controls a circuit by opening or closing contacts in response to an external electrical signal. It consists of a coil, armature, and contacts, allowing low-power signals to control high-power devices. Relays are widely used in automation, telecommunications, and electrical protection systems. They come in various types, including electromechanical, solid-state, and time-delay relays, each suited for specific applications. Their ability to provide isolation between control and power circuits makes them essential in industrial and commercial electrical systems.