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Isolation Contactor

Isolation Contactor

Isolation Contactor

(OP)
     What is the purpose of a isolation contactor(IC) on a Smart Motor Controller(SMC), and why does the enclosure for the SMC have to be bigger then a SMC without a IC?

RE: Isolation Contactor

Hello;
    The SMC motorstarter is an electronic device and in the off condition the load is not completely isolated from the line. There will be a small leakage current through the starter. As for a larger enclosure it is probably due to space requirements.

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