SU1677724A1 - Device for control over archless commutation apparatus - Google Patents

Abstract

This invention relates to electrical engineering and is intended to control arc-free commutation devices. The purpose of the invention is to increase the reliability and reduce the mass and size parameters of the device. When a voltage is applied to the output terminal 11, the power is supplied to the coil 3 of relay 1. Relay 1 is turned on, its contacts 18 open, and the contacts 16 close, which leads to the removal of voltage from coil 3 of relay 1 and connecting the coil and relay 2 to the output 11. Relay 2 is turned on, its contacts 17 are open, and contacts 19 are closed. When the contacts 17 are opened, the coil 4 of the relay 2 is de-energized. Thus, when turned on, the device provides forward switching of contacts 14 of relay 1 with respect to contacts 15 of relay 2. When disconnected, the device provides for advanced switching of contacts 15 of relay 2 with respect to contacts 14 of relay 1. 1 Il. w Ё

Description

About 4 h | XJ QE

The invention relates to electrical engineering and is intended to control arc-free switching devices.

The purpose of the invention is to increase the reliability and reduce the weight and size parameters of the device.

The drawing shows a circuit diagram of the device.

The device contains the first 1 and second 2 two-phase relays with switching on 3, 4 and turning off 5, 6 control windings, connected to the terminals through diodes 7-10 with the corresponding inputs of enabling 11 and disconnecting 12, and the ends with common bus 13, main executive 14 and 15, auxiliary control closing 16 of the first and opening 17 of the second relay contacts and block contacts 18 and 19, connected in series with the on and off windings of the first and second relays, respectively, and shunt control windings, diodes 20 - 23. Ends tklyuchayuschey windings 5 and 4, respectively winding consisting of one of the first and second relay 2 are connected to the common bus 13 through the serially connected The control terminals 16 and 17.

The device works as follows.

When a control voltage is applied to the turn-on input 11, a current flows through the turn-on winding 3 of the first two-stable relay 1 through its closed block-contact 18. This accordingly causes the first relay 1 to turn on, at. which opens its opening v closes the closing main executive contacts 14, opens the contact 18, which disconnects the power supply circuit of the turn-on winding 3 of the first relay 1 after it trips and closes the auxiliary control contact 16 that supplies the control voltage to the turn-on winding 4 of the second relay 2 through its closed auxiliary control contact 17. This causes the second relay 2 to turn on and, accordingly, to open its opening and closing main executive contacts 15, azmykaniyu auxiliary control contact 17, providing tripping circuit consisting PM-Tani winding 4 of the second relay 2 after its actuation and closure of the auxiliary contact 19 in the circuit breaking winding 6, prepares a second relay device 2 and generally to shutdown.

Since the second relay 2 is turned on via the auxiliary control contact 16 of the first relay 1, when switching on the switching device, it closes the closing and opening tripping main executive contacts 14 of the first relay 1 relative to the closing time of the closing and opening tripping main executive contacts 15 second relay 2 for the duration of the second relay response time, which is typically 5-20 ms.

0 When control voltage is applied to disconnect input 12, a current flows through the disconnecting winding 6 of the second two-stable relay 2 through its closed auxiliary contact 19, which accordingly leads to disconnection

5 of the second relay 2, at which its opening and closing main-executive contacts 15 are closed, the blocking contact 19 opens, providing the disconnection of the power supply circuit of the disconnecting winding 6 of the second relay 2 after its operation and the auxiliary control contact 17 closing the supply voltage control to the disconnecting winding 5 of the first relay 1 through its closed auxiliary control contact 16. This leads to the disconnection of the first relay 1 and, accordingly, to the opening of its opening and closing of the short the main actuating contacts 14, opening the auxiliary control contact 16, which ensures the disconnection of the power supply circuit of the disconnecting winding 5 of the first relay 1 after it has been activated, and the closure of the auxiliary contact 19 in the circuit including

5 winding 3, preparing the first relay 1 and the device as a whole to turn on.

Since the first relay 1 is disconnected through the auxiliary control contact 17 of the second relay 2,

0 when the switching device is disconnected, an opening of the opening and closing of the closing main executive contacts 15 of the second relay 2 takes place in relation to the opening time of the opening and closing of the closing main executive contacts 14 of the first relay 1 by the amount of time that the first relay 1 operates.

0 Thus, in the proposed device, the main executive closing (opening) contacts 14 of the first relay 1, when turned on, close (open) the device, and when disconnected, open once (close) later than the main closing (opening) contacts 15 of the second relay 2.

This sequence of contacts is necessary in devices of arc-free switching to ensure arc-free switching and disconnection of electrical circuits, as well as in switching devices with shorting of closing and opening contacts at the moment of switching, designed to transfer critical loads from the main source to the backup one without loss of the supply voltage. voltage at the time of switching.

In the proposed device, contacts 16-19 switch a current that does not exceed the current of one of the corresponding windings of 3-6 relays, which allows to increase the reliability and reduce the weight and dimensions of the device.

Improving the reliability of the device is also achieved by reducing the duration of current flow through the coils of relays 1 and 2.

Claims (1)

Invention Formula A device for controlling an arc-free switching device, comprising an on terminal, a disconnect terminal and a common terminal, two diodes and two two-stable relays, each of which contains an on coil, a off coil and a contact group, the first output of the open coil on the first relay the second relay, characterized in that, in order to increase the reliability and reduce the overall dimensions of the device, an additional six diodes are introduced into it, moreover, as contact groups specified relays are used contact groups with closing and opening contacts, the turn-on lead is connected to the cathode of the first diode, the anode of which is connected to the first lead of the first relay coil, the second lead of the first relay is connected via a sequentially connected break contact of the first relay to the first coil lead disconnect, the second relay, the connection point specified break contact of the first relay and the closing contact of the second relay is connected to the common output, the first output coil off After the first relay is connected in series, the closing contact of the first relay and the opening contact of the second relay is connected to the common output, the second output of the disconnecting coil of the first relay is connected to the anode of the second diode, the cathode of which is connected to the disconnecting output, the second output of the coil of the second relay is connected to the anode of the third diode whose cathode is connected to an on terminal, and the second terminal on the disconnecting coil of the second relay is connected to the anode of a fourth diode, the cathode of which is connected to the disconnect terminal, each of which The two on and off coils of the first and second relays are shunted by the corresponding fifth, sixth, seventh, and eighth diodes connected in opposite directions with the indicated first, second, third, and fourth diodes.