CONTROL DEVICE FOR REVERSING ELECTROMAGNETIC CONTACTOR Russian patent published in 1998 - IPC

FIELD: electrical engineering. SUBSTANCE: device has two leads for connecting power supply, STOP control button connected between first power lead and parallel circuit set up of series-connected FORWARD (REVERSE) contactor coil, auxiliary break contact of REVERSE (FORWARD) contactor, and START 1 (START 2) button; common points of contactor coils are connected to second power lead; auxiliary make contacts of FORWARD and REVERSE contactors shorting out START 1 and START 2 buttons, respectively, are connected through first terminals to common point of connection of STOP, START 1, and START 2 buttons; in addition, device is provided with current-limiting member one of whose leads is connected to terminals of START 1 button and make contact of auxiliary circuit of REVERSE contactor and other lead, to terminals of START 2 button and break contact of auxiliary circuit of REVERSE contactor; second terminals of auxiliary make contacts of FORWARD and REVERSE contactors are connected, respectively, to common point of connection of START 2 button and auxiliary break contact of FORWARD contactor and to that of START 1 button and auxiliary break contact of REVERSE contactor. EFFECT: reduced power requirement and material input. 2 dwg