operate relay

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• relay — [rē′lā΄; ] for v., also [ ri lā′] n. [ME relai < MFr relais, pl., orig., hounds kept as reserves at points along the course of a hunt < relaier, to leave behind < re (see RE ) + laier, to leave, let: see DELAY] 1. a fresh supply of dogs …   English World dictionary

• Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …   Wikipedia

• Relay program — The Relay program consisted of Relay 1 and Relay 2, two early American satellites.Relay 1 was launched December 13 1962, and was principally a communications satellite. Included in its payload were radiation experiments designed to map Earth s… …   Wikipedia

• Relay valve — A relay valve is an air operated valve. It is most commonly used in air brake systems to control the brakes at the rear of a trailer in a tractor trailer truck.It would take too long for sufficient air to travel from the brake pedal valve to the… …   Wikipedia

• relay — I. noun Etymology: Middle English, set of fresh hounds, from relayen Date: 1651 1. a. a supply (as of horses) arranged beforehand for successive relief b. a number of persons who relieve others in some work < worked in relays around the clock > 2 …   New Collegiate Dictionary

• relay —    An electromagnetic switching unit used to operate a circuit …   IT glossary of terms, acronyms and abbreviations

• Protective relay — See also: Power system protection In electrical engineering, a protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers …   Wikipedia

• Broadcast relay station — A broadcast relay station, relay transmitter, broadcast translator (U.S.), rebroadcaster (Canada), or repeater (two way radio) is a broadcast transmitter which relays or repeats the signal of another radio station or television station, usually… …   Wikipedia

• Shortwave relay station — A shortwave relay station typically consists of a transmitter building (or transmitter hall) and one or more HRS type antennas. Some relay stations (that operate at 100 kW or less) that only serve a local region (within 1500 km) may use Log… …   Wikipedia

• Frame relay — In the context of computer networking, frame relay consists of an efficient data transmission technique used to send digital information. It is a message forwarding relay race like system in which data packets, called frames, are passed from one… …   Wikipedia

• Wire spring relay — A wire spring relay is a type of relay, primarily manufactured by the Western Electric Company for use by the Bell System in electromechanical telephone exchanges. It was licenced for use around the world, and was commonplace in Japan. A wire… …   Wikipedia