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va rog frumos sa ma ajutati !!!! pornire motor 11 kw

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Eu folosesc un motor de 11kw la o moara pt cereale si initial am folosit pornire stea triunghi insa contactoarele erau de putere mica si s-au perlat contactele.Acum folosesc pornirea direct in triunghi ,insa folosesc un contactor TCA 63A a carui bobina este la 380V sinu am probleme

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un motor trifazat de 11kW are curentul nominal de cca 22A (la 400V) iar curentul de pornire (la pornire directa) de 7 ori mai mare, respectiv cca 154A. La pornire in stea curentul de pornire se reduce de 3 ori, deci ajunge la peste 50A. Reteaua casnica este cam slaba pentru asemenea motor.

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