SU1513568A1 - Arrangement for mutual interlocking of energization of loads - Google Patents

Abstract

The invention relates to electrical engineering and is intended for the interlocking of loads in devices protecting electrical lines, machines and devices. The purpose of the invention is to expand the field of application by using power sources with low internal resistance and improving noise immunity by eliminating the inclusion of other loads when this load is turned on. For this, the device contains for each load a relay with two closing contacts, except for the first and last relay, each having a closing contact, load switches, each with one closing contact. The relay coils are connected in series. The first terminal of the winding of the first relay is connected in parallel with the closing contacts of the load switches to the first power supply bus. The second winding terminal of the last relay is connected to the second power supply bus; the winding of each relay is shunted by the opening contact of the corresponding load switch. The first winding terminal of each relay, with the exception of the first, is connected to the first winding terminal of the first relay through the closing contact, the second winding terminal of each relay, except for the last one, is connected to the second power supply bus terminal through the closing contact of its relay. 1 il.

Description

31513

5,6,7 and 8 loads, respectively, with contacts 5,1, 5.2, 6.1, 6.2, 7.-1, 7.2 and 8.1, 8.2, shia: 9 and 10 power sources.

The windings of relays 1-4 are connected in series. The first output winding of the relay I is connected in parallel with the closing of the contacts 5.2, 6.2, 7.2 and 8.2 of the switch-disconnectors to the bus 9 of the power source. The second terminal of the winding of the relay 4 is connected to the bus 10 of the power source, the winding of the relay 1 is shunted by the opening contact 6.1. The winding of the relay 3 is shunted by disconnecting contact 7.1. The winding of the relay 4 is shunted by disconnecting contact 8.1.

The second output of the relay coil is connected via pin 1.1 to the bus 10. The first output of the relay coil 2 is connected via pin 2.1 to the first output coil of the relay 1. The second output coil of the relay 2 is connected via pin 2.2 to the power supply bus 10. The first terminal of the relay 3 winding is connected via contacts 3.1 to the first terminal of the relay 1 winding. The second terminal of the relay 3 winding is connected via terminal 3.2 to the bus 10 of the power supply. The first output of the winding of the relay 4 through the contact 4.1 is connected to the first output of the winding of the turnips 1.

The power supply voltage of the device is selected from the condition

V4g. Relay 21) 5 rede where is the switching voltage

relay;

UpHT- power supply voltage.

The loads are connected to free contacts (not shown) of relay 1-4.

The device works as follows.

Switching on is carried out by switches 5-8, when the position of one of them is reversed to the opposite one shown in the drawing, the voltage is applied to the corresponding relay coil. Indeed, for example, when the switch 6 is turned on, the supply voltage is applied to the winding of the relay 2. After the relay 2 trips, its contacts 2.1 and 2.2 close and the corresponding load is connected.

Closing in this position of the circuit breakers other loads does not lead to the connection of these loads, or to disconnect the previously selected

loads, since the windings of all non-energized relays are bridged by the contacts of the previously activated relay.

To switch on another load, you must first open the switch of the previously switched on load, i.e. reset the device and then close the switch of another load. The device thus works as described.

When two or more switches are turned on at the same time, no relay can operate, as the supply voltage is not enough to turn on two series-connected relays

Thus, the device ensures reliable blocking of switching on other loads when one is on, as well as protection against erroneous switching on of several loads simultaneously.

Claims (1)

Invention Formula A device for interlocking the switching on of loads, containing for each load of the relay, the windings of which are connected in series, load switches, each of which is equipped with an opening contact connected in parallel to the relay winding, the first and the second power bus, the second terminal of the last relay winding power supply, characterized in that, in order to expand the scope of application by using power sources with low internal resistance and high immunity to interference with the exception of the inclusion of other loads when this load is turned on, each relay is equipped with two closing contacts, except for the first and the last relay, each containing one closing contact, the first winding terminal of the first relay through parallel connected newly introduced corresponding closing contacts of the load switches is connected to the first bus power supply, the first terminal of the winding of each relay, with the exception of the first, through its first short-circuit} contact of the relay is connected to the first terminal of the winding of the first relay, swarm the output winding of each relay, with the exception of the last, through its second closing contact of its relay is connected to the second power supply bus