Contactor is an electromagnetic switch which makes or breaks electrical contacts when electrical signal is provided, it is necessary to use contactors for protection purpose because it's not possible to use manual switches for higher voltage loads. . Whereas Relay can be said as an electromechanical switch which trips and provide protection from overload and other fault conditions depending on type of relay and in some cases when relay trips we have to reset that particular relay after tracing and successfully correcting the fault.
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Contactor is an electromagnetic switch which makes or breaks electrical contacts when electrical signal is provided, it is necessary to use contactors for protection purpose because it's not possible to use manual switches for higher voltage loads.
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Whereas Relay can be said as an electromechanical switch which trips and provide protection from overload and other fault conditions depending on type of relay and in some cases when relay trips we have to reset that particular relay after tracing and successfully correcting the fault.
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