Relay wiring plays a crucial role in many electrical and automation systems. Whether it’s controlling high-power devices using low-power signals or protecting circuits from overload, understanding relay wiring is fundamental for anyone working with electrical systems. This article explores the basics of relay wiring, how it works, and its various applications.
What is a Relay? A relay is an electrically operated switch that uses an electromagnet to open or close a set of contacts. The relay’s primary function is to control a large current or voltage with a smaller, low-power signal. It allows one circuit to control another, enabling automation in electrical systems. Relays consist of two main components： Coil： The electromagnet that, when energized, activates the relay. Contacts： These include common (COM), normally open (NO), and normally closed (NC) contacts. The position of these contacts determines the flow of current in the circuit.