Summary:A relay is an electrical device that switches current between two or more circuits. It consists of a...
A relay is an electrical device that switches current between two or more circuits. It consists of a small metal strip that, in essence, revolves between two terminals. The switch mechanism has a coil of wires in each end of the strip. When an electric current passes into these coils, they generate magnetic pulses that cause the strip to rotate from one terminal to the other. It can be used to switch power on and off, or to connect or disconnect two circuits.
There are several types of relays on the market. Some have one coil, others have two. Some require continuous current to remain in a particular position, while others will only move between their positions when they are briefly exposed to a pulse of current. The type of relay required for a given application will depend on the voltage and current in that circuit, the number of sets and types of contacts needed, as well as many other factors.
One type of relay that is particularly useful in some applications is the magnetic latching relay. While other relays will only stay in a given position for as long as the coil is energized, the magnetic latching relay can be held in its latched state with no power applied to it at all. This provides important advantages and makes it an ideal choice for a wide variety of applications.
The magnetic latching relay works on the principle that a magnet can be mechanically blocked from returning to its previous position by an inertia force generated by the armature. This prevents the relay from needing to be re-energized after it is latched, and provides a high degree of mechanical stability. The presently preferred embodiment of the relay also enables it to be used to switch high amperage currents without suffering from the effects of shock or vibration.
The magnetic latching relay is a versatile, low cost, low power consumption relay suitable for a wide range of industrial and commercial applications. It can be operated with a single pulse of current, and can easily control multiple circuits to switch, break, and connect at the same time according to different forms of contact groups. It can also reduce power dissipation in the application circuit, because it only needs to be energized for short periods of time. Other types of relays need to be energized constantly, and they will hum if not re-energized when they are not in use. For more information about the magnetic latching relay, please visit our shop DFRobot Store or DFRobot Distributor.
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