Relay can be a verb meaning to repeat or broadcast something, or a noun meaning a team, a race, or a device. Learn more about the meaning, usage, and examples of relay with Cambridge Dictionary. When an electrical current runs through the coil, a magnetic field is created that activates the contacts, allowing them to open or close the circuits. Relays are frequently employed in automotive applications, industrial automation, and control systems to control high-power or high-voltage devices with a lower-power signal. How to Test a Relay? The relay is the device that open or closes the contacts to cause the operation of the other electric control. The main working principle of the relay is the electromagnetic attraction. Relay definition: a series of persons relieving one another or taking turns; shift.. See examples of RELAY used in a sentence.
