![]() ![]() This is due to collision of magnetic flux with the coil. When the current is turned “OFF” in the coil, a large back emf voltage is produced. The relay coil is generally made from coils of wire.Īs the current flows through the coil, the self-induced magnetic field is generated around it. The biggest problem with relay coils is that they are “highly inductive loads”. These magnetic fluxes are used to mechanically operate the relays contacts. This coil converts electrical current into an electromagnetic flux. One of the more important parts of any electrical relay is the coil. In normally “ON” position the switch contacts are pulled towards the inductive coil. Now, in the normally “open” position, the contacts are closed only when the field current is “ON”. One pair of contacts is called Normally Open (NO) or make contacts and another set which are called Normally Closed (NC) or break contacts. Relays are configured in two modes namely “Normally Open”, or “Normally Closed”. ![]() Related Post: Difference Between Relay and Circuit Breaker.In free standing configuration, the load currents are normally functioning of an ampere. These are either mounted directly onto PCB boards or connected as free standing. This energizing coil is also called primary circuit.Įlectrochemical relays are used in general electrical and electronic control or switching circuits. The simplest and most common form of electrochemical relays is made up of energizing coil wound around a permeable iron core. Basically it convert a magnetic flux generated by the application of an electrical control signal into a pulling mechanical force which operates the electrical contacts within the relay switch. As the name suggests, electromechanical relays are electro-magnetic devices. ![]()
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