Understanding Electromechanical Relay: Function, Applications, and Benefits
An electromechanical relay (EMR) is a device used in electrical circuits for switching purposes, where an electromagnetic field operates a mechanical switch. It is an essential component in various industrial, commercial, and consumer applications, providing reliable and precise control of high-power systems through low-power signals. The electromechanical relay’s ability to isolate different circuit parts and manage the switching of large currents makes it indispensable in modern electrical systems. Working Principle The core of the electromechanical relay is a coil of wire wound around a core, often made of iron. When an electrical current is passed through the coil, it generates a magnetic field. This field exerts a force on a movable armature or metal piece within the relay. The movement of this armature causes the contacts of the relay to either open or close, depending on the design of the relay. If the relay is a “normally open” (NO) type, the contacts will close to complete a circuit. Conversely, if the relay is a “normally closed” (NC) type, the contacts will open, breaking the circuit.