Relay

A relay is an electrically operated switch that consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. It is used to connect electrical circuits to form simple networks

A relay is an electrically operated switch used to control electrical circuits. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. Relays are in wide use in industry, education and home wiring for a wide variety of applications.

A relay is a switch that has the ability to control electrical signals. It consists of an input terminal, called the coil, and a set of contact terminals called the handles or bottom contacts. The coils are connected to one another in series using wire. The top contacts are connected to other coils in series that are completely isolated from their bottom contacts by means of insulating material between them.

Relays are made up of a number of parts including relay contacts, slides, operating and contact springs, the shaft and core. While electrical relays may be used for switching on or off devices, they can also be used to start engines and activate lights and motors.