A relay power supply is a device used to supply electrical power to other components in a system. It works by utilizing relays—electromagnetic switches that control the flow of electricity to different circuits. When a certain voltage is applied, the relay closes or opens, controlling the connection between the power source and the load. This process ensures the proper functioning of circuits, allowing for the regulation and distribution of electricity as required by various devices.

    Relay power supplies are particularly useful in controlling large electrical loads with a smaller control signal, which can protect sensitive components and manage power more efficiently. These supplies are an integral part of automation systems, power distribution networks, and even home appliances that require precise control over power.