Design the contacts for a switch or relay that opens and closes a high-current electrical circuit. NB:...

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Electrical Engineering

Design the contacts for a switch or relay that opens and closesa high-current electrical circuit.
NB: use suitable material i.e silver alloys

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4.5 Ratings (859 Votes)

Electrical Relays can also be divided into mechanical actionrelays called Electromechanical Relays and those which usesemiconductor transistors thyristors triacs etc as theirswitching device called Solid State Relays or SSRsTheElectromechanical RelayThe term Relay generally refers to a devicethat provides an electrical connection between two or more pointsin response to the application of a control signal The most commonand widely used type of electrical relay is the electromechanicalrelay or EMRThe most fundamental control of any equipment is theability to turn it ON and OFF The easiest way to do this isusing switches to interrupt the electrical supply Althoughswitches can be used to control something they have theirdisadvantages The biggest one is that they have to be manuallyphysically turned ON or OFF Also they are relatively largeslow and only switch small electrical currentsElectrical Relays however are basicallyelectrically operated switches that come in many shapes sizes andpower ratings suitable for all types of applications Relays canalso have single or multiple contacts within a single package withthe larger power relays used for mains voltage or high currentswitching applications being called ContactorsIn this tutorial about electrical relays we are just concernedwith the fundamental operating principles of light dutyelectromechanical relays we can use in motor control or roboticcircuits Such relays are used in general electrical and electroniccontrol or switching circuits either mounted See Answer

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