SU1406808A1 - Switching device - Google Patents

Abstract

This invention relates to the field of automation. The aim of the invention is to simplify by eliminating the capacitor, the resistor, and in each switching cell the capacitor and the diode. The switch contains a common resistor 2, a thyristor 4, a positive 5 and a minus 6 power supply bus and switching cells 7, each of which contains a remote switch 8 with a closing contact group 9, a button 11 with closing and opening contacts, cond-p 12 and a diode 13 Current transformer 1, common diode 3, and each were entered into the device. switching cell - resistor 10. The simplicity of the circuit design, high reliability, are an advantage of the technical solution. 1 il.

Description

The invention relates to automation and can be used for switching various devices in a DC circuit.

The purpose of the invention is to simplify the switch by eliminating the capacitor, the resistor, and in each switching cell the capacitor and the diode

The drawing shows the structural and electrical diagram of the switch.

The switchboard contains a current transformer 1, a common resistor 2, a common diode 3, a thyristor 4, a positive 5 and a minus 6 power supply buses and switching cells 7, each of which includes a remote switch 8 with a closing contact group 9, a resistor 10, a button 11 with a closing and normally open contacts, a capacitor 12 and a diode 13.

The switch works as follows.

The initial position of the switch corresponds to the position of the contacts 9 of the remote switch 8 and the button 11 in each cell 7 indicated in the drawing. In this case, the remote switch 8 of the first switching cell 7 is in the On state, and the rest are in the initial state.

If it is necessary to change the state of the switch, for example, turn on the remote switch 8 of the last switching cell 7 and turn off the remote switch 8 of the first switching cell, press button 11 of the last switching cell 7. As a result, the charging current of the capacitor flows through button 11 of the last switching cell 7 12 through the first winding of the remote switch 8 of the last switching cell 7. The remote switch 8 of the last switching switch 7 It closes, its closure contact group 9 closes, and a current pulse removed from the secondary winding of the current transformer 1 turns on the thyristor 4, thereby allowing the discharge current of the capacitor 12 of the first switching cell 7 to flow through the second winding of the remote switch 8 of the first switching cell 7 When the capacitor 1 is discharged by the first switching cell 7 Tiris

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torus 4 is turned off. At the same time, the discharge time of the capacitor 12 should be shorter than the time that button 11 of the last switching cell 7 is in the on position, which is increased by the time of contact travel from one position to another.

In the future, the switch works the same way.

The proposed switch is characterized by simplicity of circuit design and high reliability.

Claims (1)

Invention Formula A switch containing a thyristor, a common resistor and switching cells, each of which contains a remote switch with a closing contact group, a capacitor, a diode and a button with closing and disconnecting contacts, the first terminals of which are connected to the first terminals of the first and second windings of the remote switch, respectively, the second terminals which are connected to the first terminals of the closing and contact group and the capacitor, respectively, the second terminals of the closing contacts of all the switching cells are combined, and The diodes of all the switching cells are connected to the thyristor anode, the cathode of which is connected to the negative power supply bus, characterized in that, in order to simplify by eliminating the capacitor, the resistor, and in each switching cell, a capacitor and a diode, a common diode is inserted in it, current transformer, and in each switching cell - a resistor, the first output of which is connected to the second output of the closing contact group, and the second output - with the second output of the closing contact of the button, the second output of the opening contact k the module is connected to the diode anode, the second terminals of the first and second windings of the remote switches are combined, and the second terminal of the capacitor of each switching cell is connected to the minus power supply bus, the plus bus of which is connected to the second terminals of the contact terminals of all the switching cells, one output current transformer secondary winding 31406808 through a common resistor, it is connected to the lantern, and another output from the secondary common-circuit diode, whose cathode of the current transformer junction is connected to the control electrode with the control electrode of the power source.