AUXILIARY RELAY Russian patent published in 2003 - IPC

FIELD: electrical engineering. SUBSTANCE: auxiliary relay has first transistor, making and breaking coils, voltage regulator diode, first through tenth resistors, variable additional resistor, second and third transistors, first through fourth capacitors, first through fourth diodes, and rectifier unit; input terminal of voltage regulator diode is connected to first terminals of second, fourth, and tenth resistors, as well as to first, second, third, and fourth capacitors, to output terminal of third diode, and to first output terminal of rectifier whose first input terminal is connected to first input terminal of auxiliary relay; second input terminal of the latter is connected through eighth resistor to second input terminal of rectifier unit whose second output terminal is connected to first terminal of seventh resistor; second terminal of the latter is connected to second terminal of fourth capacitor, to first terminal of sixth resistor, and to input terminal of fourth diode whose output terminal is connected to first terminals of tenth and fifth resistors; second terminal of sixth resistor is connected to collector of third transistor whose emitter is connected to input terminal of third diode and base, to second terminal of fourth resistor and to first terminal of third resistor; second terminal of the latter is connected to emitter of second transistor whose collector is connected to second terminal of second resistor and to base of first transistor whose collector is connected to base of second transistor and emitter, to second terminal of first capacitor and to output terminal of first diode; input terminal of this diode is connected to control input of first resistor whose first extreme terminal is connected to second terminal of tenth resistor and second extreme terminal, to output terminal of voltage regulator diode and to input terminal of second diode; output terminal of the latter is connected to second terminal of second capacitor and to second terminal of second resistor; second terminal of sixth resistor is connected to first extreme terminal of additional resistor and to its adjusting terminal; second extreme terminal of additional resistor is connected to input terminal of second diode; second terminal of third capacitor is connected to second terminal of tenth resistor and to input terminal of breaking coil; output terminal of the latter is connected to first terminal of fifth resistor; input and output terminals of making coil function, respectively, as third and fourth input terminals of auxiliary relay and are connected to minus and plus leads of dc current supply, respectively. EFFECT: enhanced reliability due to protection against unauthorized off-operation. 3 cl, 1 dwg