CONTROL SYSTEM USING AN ALTERNATING CURRENT CONTACTOR AND A DIRECT CURRENT OPERATED INTERPOSING RELAY

摘要

47,617 CONTROL SYSTEM USING AN ALTERNATING CURRENT CONTACTOR AND A DIRECT CURRENT OPERATED INTERPOSING RELAY An electrical control system employs a contractor having an AC operated coil, an interposing relay having DC operated electronic switching comprising a triac and a rectifier, and a manually operated pushbutton switch. The coil is connected in series with the output of the triac and an AC power supply. The rectifier is connected to the AC supply to form a source of direct current. The pushbutton and the DC source are connected in series with the input of the triac whereby actuation of the pushbutton is operable to provide a low impedance path across the output terminals of the triac and activate the contactor. The contactor is mounted in a housing having a plurality of exterior cavities adapted to receive a smaller housing containing the triac,rectifier, and associated components. The control system is particularly suited for applications wherein the pushbutton switch is situated at an extended distance from the contactor.