Relays are electrically operated switches that control the flow of electrical current in a circuit. Their main function is to allow a low-power signal to control a higher power circuit, acting as a switch for controlling various applications. With the advent of automation, energy efficiency requirements, and sophisticated industrial systems, relays have become indispensable in everyday industrial operations. They are used for protection, switching, signaling, and automation control, making them essential for smooth operations in power plants, factories, and various commercial facilities.