SU1529304A1 - High-voltage generator switch - Google Patents

Abstract

The invention relates to high-voltage electrical equipment, namely, high-voltage generator switches. The purpose of the invention is to increase the switching capacity and reduce dynamic loads. The generator switch comprises a housing 1 on which a main current-carrying system, consisting of fixed contacts 3, 4 and a moving contact 5, rests on the supporting insulators 2. The arcing device 6 mounted through two flanges on the main current-carrying system is coaxial to the contacts, one flange conductive and the other insulating. The movable contact 9 of the arc-suppressing device 6 is made in the form of a cylinder with an annular piston 10 at the end opposite to the fixed contact 11. The annular piston 10 mates with the outer surface of the inner cylinder 12, the inner surface of which forms the nozzle 13, and is placed in the outer cylinder 14. Sub-piston cavity 15 for disconnection associated with openings 16 with an adjustable cross section with a blast cavity 17. The firing piston cavity 18 is equipped with a return spring 19 and is connected to the atmosphere with an opening 20. A fixed contact 11 in It is made in the form of two sockets installed one in another - the outer 21 and the inner 22, coaxially with which the nozzle 23 is located. The switch is equipped with a reservoir 24 with compressed air, a blower valve 25, an exhaust pipe 26, a separator 27 and an arc-shaped electrode 28. 2 Il.

Description

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I leading system, with one flax; Net is filled with conductive, and the other one is insulating. The mobile con-: tact 9 of the arcing device 16 is made in the form of a cylinder with a ring-shaped piston 10 at the end opposite to the fixed contact 111. The annular piston 10 is conjugated | With the outer surface of the inner cylinder 12, the inner surface of which the nozzle 13, and is placed in the oversized cylinder 14. The piston cavity 15 is disengaged in connection with the openings 16 with an adjustable

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a cross-section with a blast cavity 17. The firing piston cavity 18 is equipped with a return spring 19 and is connected to the atmosphere with a hole 20, Fixed contact 11 is made in the form of two sockets installed one in the other - an outer 21 and an inner 22, a coaxial Q but which has a nozzle 23. The switch is equipped with a reservoir 24 with compressed air, a blower valve 25, an exhaust pipe 26, a separator 27, and an electric receiving -, of type 28. 2 sludge.

The invention relates to electrical equipment, in particular to generator switches, which are built in to the shield-conductor.

The aim of the invention is to increase the switching capacity of the switch and reduce the dynamic loads on the supporting insulators.

Figure 1 schematically shows a high-voltage generator switch off the gel, a general view; Fig. 2 - part of a switch with flanges, i The high-voltage generator has a case made of 3 kinds of metal screen 1, through which supporting insulators 2 pass through a coaxially main current-carrying system, consisting of fixed contacts 3 , 4 ii of movable contact 5, Coaxial and fixed contact 3 of the main rock speaker system is located (a damper device, consisting | i3 of two switching devices 6, installed by means of flanges 7, 8 on the main current carrying system and the flange 7 is made of a material with a low electrical resistivity, and the flange 8 is made of a material of

The movable contact 9 of the commuting device 6 is made in the form of a slinder with an annular piston 10 on the sun opposite to the fixed contact 11, the annular piston 10 of the horizontal with the outer surface of the inner cylinder 12, the inner surface of which forms an interface 13, and is placed in the outer cylinder 14, the annular piston 10, the inner cylinder 12 and the outer cylinder 14 are arranged coaxially.

Sub-piston cavity 15 for disconnection is connected by openings 16 with adjustable cross-section with a blast cavity i 7, common to arc suppressor-. The device consisting of two switching devices 6, the Piston cavity 18 for switching on is equipped with a return spring 19 and is connected to the atmosphere by a hole 20о. The fixed contact 11 of the switching device 6 is made in the form of two outlets 21 that are installed one inside the other and 21 are located coaxially nozzle 23.

The switch is equipped with a tank 24 with compressed air, a blower valve 25, an exhaust pipe 26, a separator 27 and an arc-receiving electrode 28,

High-voltage generator switch, built-in shielded conductors, operates as follows.

In the on position of the generator switch, the current flows through the main fixed contacts 3 and 4 located at the ends of the copper cylinders closed through the main movable contact 5.

When the switch is turned off, the main fixed contact with the fixed contact 3 is thawed. The current flows into the circuit formed by the separator 27, an arcing device consisting of two switching devices 6, and a flange 7. The blow valve 25 opens, the exhaust air from the tank 24 flows into the distribution pipe 29, and the gas - from it in the cavity 17 of the switching device 6, through the holes 16 the air enters the piston chamber t5. Moving contact 9 goes off. When disconnected, the arc is blown by a stream of compressed air from the cavity 17 and moves to the arcing tip of the inner cylinder 12 and to the arc-receiving electrode 28. The arc is blown by air streams along its entire active zone, as a result of which it is quenched at the first zero crossing, and then turned off separator 27.

The products of the arc are ejected through the nozzles 13 and 23, forming a system of two-sided asymmetrical blowing.

The design of the generator switch with an arc-suppressing device, representing a design with two-sided blast and a lightweight system of arcing contacts, allows an increase in the switching capacity of the switch. The presence of a current-conducting flange, which is furthest from the fixed contact of the main current-carrying system, improves the current transfer conditions from the main current-carrying system to the arcing device and thereby also increases the switching capacity of the switch. The double-breaking arc-suppressing device is installed in such a way that the inertia force of the moving contacts, when switched off, is mutually damped without transferring the load to the supporting insulators.

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A high-voltage generator switch built into a shielded conductor, through which the main current-carrying system with moving and fixed contacts and an arcing device, consisting of two switching devices with moving and fixed contacts arranged along the same axis and fixed, rests through the supporting insulators. by means of flanges on the main current-carrying system, a blast cavity and a nozzle, characterized in that, in order to increase switching capacity and reduce dynamic loads, the supporting insulators, the flange furthest from the fixed contact of the main current-carrying system, are made of a conductor, the rest of the flanges are insulating, each switching device contains a fixed contact made in the form of two sockets installed one into the other the nozzle, and a movable contact consisting of two coaxially arranged stationary cylinders, the inner one serving as the second nozzle, and the outer one, in the gap between the walls of which there is a moving contact, provided An annular piston at the end opposite to the fixed contact — the podporshnevaya disconnecting cavity is connected by openings with an adjustable cross section to the plenum cavity by an arc-extinguishing device, and the podporshnevaya to the incorporation is provided with a return valve and is connected to the atmosphere.

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Fig.i

Claims (1)

Claim A high-voltage generator switch built into a shielded conductor, through which the main current-carrying system with moving and fixed contacts and an arcing device, consisting of two switching devices with moving and fixed contacts arranged along the same axis and fixed by means of flanges on the main current, rests on supporting insulators15 leading system, blast cavity and nozzle, characterized in that, in order to increase the switching capacity and reduce the dynamic loads on the The insulators, the flange furthest from the fixed contact of the main current-carrying system, are conductive, the rest of the flanges are insulated, each switching device contains a fixed contact made in the form of two sockets installed one into the other, the co-axially located nozzle, and a movable contact , consisting of 30 TLD ^X coaxially arranged stationary cylinders - internal, serving as the second nozzle, and external, in the gap between the walls of which there is a moving contact, equipped with an annular piston at the end, pro- 35 opposite to the fixed contact, with the sub-piston cavity for disconnection being connected by openings with an adjustable cross section with a blowing floor. an arcing device, and a sub-piston cavity for activation is equipped with a return spring and is connected with the atmosphere. 1529304 1