FIELD: miscellaneous dc electromagnetic operating mechanisms supplied with power from ac mains.
SUBSTANCE: proposed device has three star-connected branches of electric circuit; series-connected in one branch are one of make contacts of ON-button and single-phase rectifier bridge with electromagnetic operating mechanism coil connected at its output; series-connected in other branch are second make contact of ON-button and break contact of relay whose coil that functions as current-limiting member is inserted in third branch; input of first and second branches is connected to line voltage of three-phase supply mains and third branch, to neutral wire.
EFFECT: reduced power requirement and ability of device operation in electromagnetic operating mechanisms having no contacts of their own.
2 cl, 2 dwg
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