CN111630619A

CN111630619A - High-voltage circuit breaker and method for holding a vacuum interrupter in a high-voltage circuit breaker

Info

Publication number: CN111630619A
Application number: CN201880080359.0A
Authority: CN
Inventors: M.巴茨; A.哈通; M.克伦克
Original assignee: Siemens AG
Current assignee: Siemens Energy Global GmbH and Co KG
Priority date: 2017-12-15
Filing date: 2018-11-15
Publication date: 2020-09-04
Anticipated expiration: 2038-11-15
Also published as: DE102017222933A1; EP3698386A1; EP3698386B1; CN111630619B; WO2019115133A1

Abstract

The invention relates to a high-voltage circuit breaker (1) having a holding device (2) in the form of a suspension for a vacuum interrupter (3) and to a method for holding a vacuum interrupter (3) in a cylindrical insulator (4) of a high-voltage circuit breaker (1). The vacuum interrupter (3) is arranged in a cylindrical insulator (4) and is spatially fixed by the holding device (2) and electrically connected to a terminal (5) on the outside of the high-voltage circuit breaker (1). The holding device (2) comprises a hollow cylindrical region with a wall (6) having at least one opening (7, 8).

Description

High-voltage circuit breaker and method for holding a vacuum interrupter in a high-voltage circuit breaker

The invention relates to a high-voltage circuit breaker having a holding device in the form of a suspension for a vacuum interrupter and to a method for holding a vacuum interrupter in a cylindrical insulator of a high-voltage circuit breaker. The vacuum interrupter is arranged in a cylindrical insulator and is spatially fixed by a holding device and is electrically connected to a terminal on the outside of the high-voltage circuit breaker.

High-voltage circuit breakers or high-voltage circuit breakers are designed to switch voltages in the range of up to 1200kV and currents in the range of up to several thousand amperes. Switching gases (Schaltgas), such as SF, are used here₆The switching gas is harmful to the climate and/or contains toxic components. The long-term stable, gas-tight insulation of high-voltage circuit breakers, which reliably prevents gas leakage, is costly and increases the maintenance costs. Switches with alternative switching gases, for example Clean Air (dry, cleaned Air), are to be dimensioned larger in the same manner of construction and with the same maximum switching voltage or current to be switched, in order to ensure reliable electrical insulation between electrically conductive components, which increases costs. The use of vacuum interrupter tubes in combination with clean air as insulating gas in high-voltage circuit breakers is based on the use of a switching gas, such as SF, with rated and arcing contacts₆Alternative to the gas-insulated switch of (1).

The vacuum interrupter is arranged in an external insulator, which is designed, for example, in the form of a cylinder with a circumferentially surrounding rib on the outer circumference in order to increase the electrical insulation in the direction of the longitudinal axis along the outer circumference. The insulator is of single-or multi-component, in particular hollow-cylindrical design and is made, for example, of ceramic, silicone and/or composite material. The insulator is arranged upright during operation of the high-voltage circuit breaker, for example on a carrier or a support with a base. One or more vacuum interrupters are arranged, for example, along the longitudinal axis of the insulator, in particular coaxially to the longitudinal axis of the insulator, and are mechanically fixed in the insulator. In the following, a vacuum interrupter is taken as a starting point, wherein the high-voltage circuit breaker may comprise more than one vacuum interrupter connected in series and/or in parallel.

The vacuum interrupter is arranged and connected in a mechanically stable and electrically conductive manner between at least two electrical connections, wherein the electrical connections are designed, for example, in the form of connecting pieces for connecting high-voltage lines, generators and/or consumers. When the voltage and/or current to be switched on and off at the high-voltage circuit breaker is high, the current may cause a large amount of heat to be released at the electrically conductive components of the high-voltage circuit breaker. The excess heat must be discharged well from the high-voltage circuit breaker to the surroundings in order to ensure reliable operation and avoid damage over a long period of time. In order to ensure that the electrical losses through the high-voltage circuit breaker in the switched-on state are low, thereby reducing heat dissipation and minimizing costs during operation of the high-voltage circuit breaker, the current-carrying components must have a low electrical resistance.

Clean air as an insulating gas in high-voltage circuit breakers must be stable in its composition over a long period of time, for which purpose, for example, filter materials can be used. The filter material can, for example, condense moisture, which can lead to a deterioration of the insulating properties on the insulator, in particular by condensation, in the event of a temperature change. The filter material is placed in the interior of the insulator in such a way that there is good contact with the insulating gas.

The object of the invention is to provide a high-voltage circuit breaker having a holding device in the form of a suspension for a vacuum interrupter and a method for holding a vacuum interrupter in a cylindrical insulator of a high-voltage circuit breaker, which solve the aforementioned problems. The object of the invention is, in particular, to provide a high-voltage circuit breaker having a holding device for a vacuum interrupter, which allows high currents with low electrical losses, allows good heat conduction via the holding device, which mechanically fixes the vacuum interrupter spatially in the high-voltage circuit breaker, is inexpensive and ensures reliable functioning of the high-voltage circuit breaker.

The object is achieved according to the invention by a high-voltage circuit breaker having a holding device in the form of a suspension for a vacuum interrupter having the features of claim 1 and/or by a method for holding a vacuum interrupter in a cylindrical insulator of a high-voltage circuit breaker, in particular in the aforementioned high-voltage circuit breaker, according to claim 13. Advantageous embodiments of the high-voltage circuit breaker according to the invention with a holding device in the form of a suspension for the vacuum interrupter and/or of the method for holding the vacuum interrupter in a cylindrical insulator of the high-voltage circuit breaker, in particular in the aforementioned high-voltage circuit breaker, are specified in the dependent claims. The features of the independent claims can be combined with one another or with the features of the dependent claims and the features of the dependent claims can be combined with one another.

The high-voltage circuit breaker according to the invention with a holding device in the form of a suspension for a vacuum interrupter comprises a vacuum interrupter arranged in a cylindrical insulator and spatially fixed in the insulator by the holding device and electrically connected to a terminal outside the high-voltage circuit breaker. The holding device comprises a hollow cylindrical region with a wall having at least one opening.

High currents with low electrical losses are achieved by the holding device having a hollow cylindrical region. The holding device with the hollow cylindrical region achieves good heat conduction, in particular from the vacuum interrupter to the external connection of the high-voltage circuit breaker. The holding device achieves mechanically stable spatial fixing of the vacuum interrupter in the high-voltage circuit breaker, is cost-effective and achieves a long-term stable and reliable function of the high-voltage circuit breaker.

The vacuum interrupter and the cylindrical insulator can have a common longitudinal axis, which is arranged, in particular, parallel to the force of gravity. By arranging the insulator in the form of a cylinder and the vacuum interrupter in the insulator perpendicular to the ground or horizontal plane, only forces, in particular gravity forces, in a direction parallel to the longitudinal axis act on the vacuum interrupter suspended on the holding device. This makes it possible to fix the vacuum interrupter in the cylindrical insulator in a simple and cost-effective manner for a long time on the holding device without load-generating shear forces that would compromise the stability of the vacuum interrupter.

The holding device can be of pot-shaped design, having a cylindrical region which is closed by a base to which the vacuum interrupter is in particular mechanically fastened. The vacuum interrupter can be connected, in particular screwed, soldered and/or welded, in a planar contact, for example, by one of the electrical contacts of the vacuum interrupter on the base. This makes it possible to achieve good mechanical and electrical contact between the holding device and the vacuum interrupter, as a result of which high electrical losses can be prevented during operation of the high-voltage circuit breaker, and a stable fixing or holding of the vacuum interrupter in the insulator can be achieved over a long period of time, in particular for providing a durable, reliable high-voltage circuit breaker.

The holding device can be designed in the form of a pot with a closure cap by means of which the hollow cylindrical region of the holding device and/or the insulator are closed in a fluid-tight manner on one side, wherein the closure cap comprises in particular a rupture disk or a safety disk (11). The cover can surround the electrical connections of the high-voltage circuit breaker and prevent the insulator from bursting in the event of an overvoltage by means of a rupture disk. In the event of an insulator burst, injury to personnel, for example maintenance personnel, around the high-voltage circuit breaker can occur. In order to prevent this, a bursting disk at the upper end of the high-voltage circuit breaker can vent the excess pressure generated by the explosion in the high-voltage circuit breaker upward without endangering people. The overpressure can be generated, for example, by a temperature increase during operation due to the formation of an interfering arc, or by environmental influences, such as temperature changes, pressure changes or solar radiation in the surroundings.

The holding device can comprise a shielding structure for the end region of the electrical contact (or electrical contact) of the vacuum interrupter, in particular a hollow-cylindrical shielding structure on the lower end of the holding device. The shielding structure can shield the electric field in the surroundings of the electrical contacts of the vacuum interrupter and can prevent spark discharges or short circuits, in particular via the inner wall of the insulating part.

The wall may have a strengthened region comprising a greater wall thickness than an unreinforced region. This makes it possible to reduce the electrical losses, in particular in regions with an excessive field due to corners and/or edges, which may be rounded in particular in order to reduce the excessive field. Furthermore, the mechanical stability and thus the durability of the holding device can be increased.

The hollow cylindrical region of the holding device can comprise a filter material, in particular for absorbing liquid and/or gaseous contaminants. The filter material may be, for example, a desiccant, which absorbs, in particular, water and/or other liquids. This makes it possible, for example, to permanently maintain the quality of the clean air and to prevent liquid from condensing on the inner wall of the insulator and/or on the outer wall of the vacuum interrupter, which could lead to a reduction in the insulating effect and thus to a spark discharge or an electrical flashover. In particular, when the holding device is designed in the form of a pot, the filter material can be stored in the interior of the pot shape, i.e. in the interior of the hollow cylindrical region of the holding device, in particular in good contact with the insulating gas.

It is possible in particular to include clean air as insulating gas in the interior of the insulator. Clean air is not harmful to the climate, and is environmentally friendly and non-toxic when leaked from a high voltage power switch during operation or after disposal. It is highly advantageous if the contacts of the vacuum interrupter and/or the external contacts of the high-voltage circuit breaker are electrically insulated from one another in the insulator even at high voltages.

At least one opening for the removal of heat, in particular for the waste heat of the contacts of the vacuum interrupter, can be formed in the bottom of the holding device. The holding device can be of pot-shaped design, with a cylindrical region which is closed by a base, and one or more openings can be formed in the base or in the region between the base and the circumferential surface of the cylindrical region, for example by drilling. Waste heat generated during operation of the high-voltage circuit breaker, for example, in particular at high currents, on the electrical contacts of the vacuum interrupter can be dissipated by convection of the insulating gas via the at least one opening into other regions of the high-voltage circuit breaker, for example, regions of the inner wall of the insulator, in which the insulating gas can cool. This allows the vacuum interrupter, in particular the contacts of the vacuum interrupter, which are shielded by the shielding structure, to be cooled and prevented from overheating or being damaged or destroyed due to excessive temperatures.

At least one opening can be formed in the wall of the holding device, in particular for the fluid connection of the gas space between the insulator and the holding device to the hollow cylindrical region in the interior of the holding device. For a holding device which is configured in the form of a pot and has a cylindrical region, the cylindrical housing of which is formed by a wall, an opening can be formed in the cylindrical housing. For example, insulating gas from the gas space or the region between the insulator and the holding device can flow through the at least one opening into and/or out of the hollow-cylindrical region in the interior of the holding device, for example for cooling the hollow-cylindrical region in the interior of the holding device, for venting an overpressure and/or for bringing the gas into good contact with, for example, a filter material.

The high-voltage circuit breaker may comprise at least two external electrical connections in the form of terminal strips, in particular at least one external electrical connection of the high-voltage circuit breaker at each end of a cylindrical insulator, wherein the at least one external electrical connection is electrically connected, in particular directly connected, to an electrical fixed contact of the vacuum interrupter by means of a holding device. At least two external electrical connections in the form of connecting pieces can be designed to connect the high-voltage lines, generators and/or consumers to the high-voltage circuit breaker, and the high-voltage circuit breaker can close and/or open the current path between the high-voltage lines, generators and/or consumers. The high-voltage circuit breaker therefore electrically switches on and/or electrically disconnects the high-voltage lines, generators and/or loads, in particular at voltages in the range of 35kV, 145kV and/or up to 1200 kV.

The holding device may be constructed in one piece. In particular, in the range of several hundred amperes, electrical losses, which may occur in the connection points of the components when the holding device is constructed in multiple components, can thereby be avoided when the current flows through the holding device. The reduction of electrical losses also reduces the heat generation or waste heat of the high-voltage circuit breaker during operation, which increases the operational safety and durability and prevents damage or even destruction due to high temperatures.

The method according to the invention for holding a vacuum interrupter in a cylindrical insulator of a high-voltage circuit breaker, in particular in the aforementioned high-voltage circuit breaker, comprises spatially fixing the vacuum interrupter in the insulator by means of a hollow cylindrical holding device and electrically connecting it to contacts outside the high-voltage circuit breaker, and suspending the vacuum interrupter down on the holding device.

The holding device can dissipate a large amount of heat from the vacuum interrupter, in particular from the interior of the insulator, to the environment of the high-voltage circuit breaker during operation of the high-voltage circuit breaker.

The advantages of the method according to the invention for holding a vacuum interrupter in a cylindrical insulator of a high-voltage circuit breaker, in particular of the aforementioned high-voltage circuit breaker, according to claim 13 are similar to the aforementioned advantages of the high-voltage circuit breaker according to the invention according to claim 1 with a holding device in the form of a suspension for the vacuum interrupter and vice versa.

Embodiments of the invention are schematically shown in fig. 1 to 5 and are explained in detail below.

In the drawings:

fig. 1 shows a schematic sectional view of a high-voltage circuit breaker 1 according to the invention, viewed from the side, with a holding device 2 for a vacuum interrupter 3; and is

Fig. 2 schematically shows the holding device 2 of fig. 1 in an enlarged view in cross section; and is

Fig. 3 shows schematically in a sectional view the holding device 2 of fig. 2 with an opening 7 in the bottom 9 for cooling the vacuum interrupter tube 3 by means of an insulating gas circuit; and is

Fig. 4 schematically shows in enlarged cross-section the shielding structure 12 on the holding device 2 of fig. 3 for shielding the electrical contacts 17 of the vacuum interrupter 13; and is

Fig. 5 shows the holding device 2 of fig. 3 schematically in a sectional view with a rupture disk 11 in the closure cap 10 of the high-voltage circuit breaker 1.

Fig. 1 shows a high-voltage circuit breaker 1 according to the invention in a sectional view from the side. The high-voltage circuit breaker 1 comprises a vacuum interrupter 3 in a cylindrical insulator 4, which vacuum interrupter is fixed to a holding device 2 of the high-voltage circuit breaker 1. The vacuum interrupter 3 is of substantially cylindrical design and has a longitudinal axis which is coaxial to the longitudinal axis of a cylindrical insulator 4, which is likewise of substantially cylindrical design. The cylindrical insulator 4 is designed as a hollow cylinder with ribs running annularly around the outer circumference, which improve the electrical insulation along the longitudinal axis of the insulator 4 by lengthening the path for the leakage current along the longitudinal axis of the insulator on the outside of the insulator 4. The insulator 4 is made of, for example, ceramic, silicone and/or an electrically insulating composite material.

The cylindrical hollow body of the insulator 4 is closed in a gas-tight manner at its ends, i.e. on the bottom or top side of the column, and is provided with an external electrical terminal 5 in the form of a terminal strip of the high-voltage circuit breaker 1. The closing cap 10 serves to hermetically close the insulator 4 at an end of an upper portion of the insulator 4. The insulator 4 is arranged at the lower end on a support, which is not shown in the figures for reasons of clarity, on which the insulator 4 in the form of a column is arranged with its longitudinal axis perpendicular to the ground or parallel to the direction of gravity.

The high-voltage circuit breaker 1 comprises at least one drive and elements of a kinematic chain, which are not shown in the drawings for reasons of simplicity. When the high-voltage circuit breaker 1 is switched on and off, the movable contact is driven in the vacuum interrupter 3 by means of the drive and the elements of the kinematic chain, as a result of which the current path through the vacuum interrupter 3 is cut off or opened or connected or closed between the external electrical connections 5. The high-voltage circuit breaker 1 switches on or off high-voltage cables, generators and/or consumers, in particular connected to the terminal 5, by closing or opening a current path. The high-voltage circuit breaker 1 is designed in particular for switching voltages in the range of 35kV, 145kV and up to 1200 kV.

The holding device 2 for the vacuum interrupter 3 is arranged in the insulator 4 at the end of the upper part of the insulator 4 which is closed off in a gas-tight manner by the closure cap 10. The holding device 2 is clamped, screwed, welded, soldered and/or glued, for example, between a flange on the end of the insulator 4 and the closure cap 10. For a cap-shaped holding device 2, a flange is used to fix the holding device 2 between a flange on the insulator 4 and the closure cap 10. The electrical terminals 5 are arranged in the form of lugs directly on the outer flange of the insulator 4 on the holding device 2 and are connected to the holding device 2 in a well-conducting manner, in particular directly.

The holding device 2 projects into the interior of the insulator 4 coaxially with the cylindrical insulator 4 in the form of a hollow cylindrical housing as a wall 6 and is closed at the end opposite the flange by a base 9 as a cylindrical bottom. Fig. 2 schematically shows the holding device 2 arranged in the insulator 4 in an enlarged sectional view, and said holding device is closed in an upward gas-tight manner by a closure cap 10. The electrical contact, i.e. the fixed contact 17 of the vacuum interrupter 3 in the exemplary embodiment shown in the drawing, is fixed on the base 9 in a well-conducting manner. The base 9 is reinforced with additional material, i.e. has a greater thickness than the cylindrical wall 6 of the holding device 2. The strengthened region 15 reduces electrical losses in high current intensities.

The fixed contact 17 of the vacuum interrupter 3 is connected in planar electrical contact, for example soldered, welded, screwed and/or glued, to the base 9 of the holding fixture 2. Starting from the holding device 2, the vacuum interrupter 3 extends downward along the longitudinal axis of the insulator 4 or of the vacuum interrupter 3 and has a fixed contact 17, a cover-like, in particular metallic, closure device and a cylindrical, for example ceramic, insulator, a cylindrical, for example metallic, connecting part and at least a second cylindrical, for example ceramic, insulator, which is closed at the lower end by a cover-like, in particular metallic, closure device of the vacuum interrupter 3 for vacuum sealing. The drive rod is guided in a vacuum-tight, displaceably mounted manner in the vacuum interrupter tube 3 by a lower cover-like closure device, for example by a bellows, in order to be able to drive the displaceable contact in the vacuum interrupter tube 3 during switching on and off. Such vacuum interrupter tubes are known from the prior art and are only schematically shown from the outside in the figures.

The vacuum interrupter 3 is arranged at the lower end of the insulator 4 coaxially with the insulator 4, for example, fixedly, in particular immovably, by a hollow cylindrical holding device. The holding means may mechanically support the vacuum interrupter 3 upwards. The vacuum interrupter 3 is suspended at the opposite end on the holding device 2, whereby a mechanically and temporally stable arrangement of the vacuum interrupter 3 in the insulator 4 is achieved even in the case of forces acting on the vacuum interrupter 3 during switching.

The holding device 2 has, as shown for example in the exemplary embodiment in fig. 2, regions 15 reinforced by additional material in the region of the connection of the cylindrical jacket or wall 6 of the holding device 2 to the base 9 and in the region of the connection of the cylindrical jacket or wall 6 of the holding device 2 to the flange of the cap-shaped holding device 6. The material thickness of the holding device 2 is thicker in the reinforced region 15 than the thickness of the wall 6 in the cylindrical housing region of the holding device 6, in particular two to three times the thickness of the wall 6 in the cylindrical housing region of the holding device 6. The reinforced region 15 makes it possible to reduce electrical losses when the current flowing between the fixed contact 17 of the vacuum interrupter and the external electrical connection 5 of the high-voltage circuit breaker 1 through the holding device 6 is high.

In the exemplary embodiment of fig. 2, an opening 8 is provided in the cylindrical housing or in the wall 6 of the holding device 2, which opening is formed, for example, in a circular or oval manner, through the wall. The openings may be punched out, for example, as holes or may be cut into the wall 6 during the casting of the holding device 2. For example, two, four or six openings 8 can be formed through the wall 6, in particular on mutually opposite sides of the wall 6. The opening 8 fluidly connects an inner region of the hollow cylindrical holding device 2 with a region filled with an insulating gas between the holding device 2 and the insulator 4. Through the opening 8, a gas exchange, in particular a gas exchange of clean air, is achieved between the inner region of the hollow cylindrical holding fixture 2 and the region between the holding fixture 2 and the insulator 4.

As shown in detail in the exemplary embodiment of fig. 3, an opening 7 can be provided between the base 9 and the cylindrical housing 6 of the holding device 2 in the base 9 and/or in the reinforced region 15. Similarly to the openings 8 in the wall 8, for example, two, four or six through-openings 7 can be formed by drilling, in particular on mutually opposite sides of the wall 6. The opening 7 fluidly connects the inner region of the hollow cylindrical holding fixture 2 to the region filled with insulating gas between the holding fixture 2 and the vacuum interrupter 3 at the lower end 14 of the holding fixture 2. A gas exchange, in particular a gas exchange of clean air, between the inner region of the hollow cylindrical holding fixture 2 and the region between the holding fixture 2 and the vacuum interrupter 3 is achieved via the opening 7. Heat generated in particular at high currents at the fixed contact 17 and/or at the mechanical contact with the holding device 2 can be dissipated, for example, by convection of gas through the

openings

7 and 8 into the surroundings and out of the vacuum interrupter 3.

Fig. 4 schematically shows a detail of the lower end 14 of the holding device 2 from fig. 3 in a sectional view in an enlarged manner. In order to shield the electrical contact 17 and/or the end region 13 of the vacuum interrupter 13, a shielding structure 12 is arranged on the holding device 2 in a cylindrical manner. The shielding structure 12 comprises the bottom 9 of the holding device 2 as a top surface and has a circumference which is slightly larger than the circumference of the vacuum interrupter tube 3. The shielding structure 12 covers the end region 13 of the vacuum interrupter 13 and electromagnetically shields said vacuum interrupter from the surroundings, in particular from the inner wall of the insulator 4. This reduces or prevents spark discharges and leakage currents between the contacts of the vacuum interrupter 3, in particular via the inner wall of the insulator 4. The inner shape of the shielding structure 12 corresponds to an enlargement of the outer shape of the end region 13 of the vacuum interrupter 13, with a constant distance along the circumference between the shielding structure 12 and the end region 13 of the vacuum interrupter 13, in particular in the range of a few millimeters or a few centimeters.

Fig. 5 shows a schematic sectional view of the high-voltage circuit breaker 1 in the region of the holding device 2 corresponding to fig. 3, with a bursting disk 11 in the closing cap 10 of the high-voltage circuit breaker 1. When a predefined overpressure is reached in the interior of the high-voltage circuit breaker 1, the rupture disk 11 can break or burst and a pressure equalization is established between the surroundings and the interior of the high-voltage circuit breaker 1. An overvoltage may occur, for example, via the insulating gas when the temperature in the high-voltage circuit breaker 1 rises, in particular as a result of the components of the high-voltage circuit breaker 1 rising at high current flows and/or solar radiation. The overpressure is discharged through the rupture disk 11 in a direction perpendicular to the ground and prevents the insulator 4 from bursting sideways. This protects personnel, in particular maintenance personnel, from being damaged by the flying-off pieces of the insulator 4. The

openings

7, 8, in particular the opening 8, can be dimensioned such that, for example, a pressure equalization or pressure compensation between the region between the holding device 2 and the insulator 4 and the interior of the holding device 2 takes place in a predetermined manner and the rupture disk 11 can be ruptured from a certain internal pressure change.

The foregoing embodiments may be combined with each other and/or with the prior art. Thus, for example, the rupture disk 11 may comprise different materials, for example a metal plate and/or plastic. The thickness and/or the area of the rupture disk 11 can be designed according to the maximum permissible internal pressure in the high-voltage circuit breaker 1. The holding device 2 is composed of a material with high mechanical strength, such as copper, steel and/or aluminum, which is electrically and thermally well conductive. High current intensities, in particular in the range of a few hundred amperes, can flow through the holding device 2 without a strong heat release. The heat of the vacuum interrupter 3 can be dissipated to the surroundings in a good manner by the holding device. The wall 6 can be designed for this purpose, in particular, with a uniform thickness in the range of a few centimeters. The reinforced region 15 of the holding device 2 can also be provided with a thickness of two to several times the thickness of the wall 6.

The vacuum interrupter 3 can be fixed in the base 9 of the holding device 2 by means of screws, in particular such that the force direction of the force of gravity is suspended in the direction of the longitudinal axis of the vacuum interrupter 3 or parallel to the longitudinal axis of the vacuum interrupter 3. Other fastening means and/or methods for fastening the vacuum interrupter 3 to the bottom 9 of the holding device 2, such as rivets, pins, welding, soldering and/or gluing, can also be used. The vacuum interrupter 3 is supported in particular on the bottom of the high-voltage circuit breaker 1, which can be fixed coaxially in the insulator 4 by the holding device 2 even when the insulator 4 is arranged obliquely. The one-component or one-piece design of the holding device 2 enables current or power losses to be reduced during operation of the high-voltage circuit breaker 1, and the holding device 2 may alternatively also be designed in multiple components, in particular with good electrical contact between the individual components or elements of the holding device 2.

List of reference numerals

1 high-voltage power switch

2 holding device

3 vacuum switch tube

4-column insulator

5 external electrical terminal

6 wall

7 opening in the bottom

8 opening in wall

9 bottom

10 closure cap

11 rupture disk

12 shield structure

13 end region of a vacuum interrupter

14 end of the lower part of the holding device

15 region of reinforcement

16 Filter Material

17 electric fixed contact of vacuum switching tube

Claims

1. A high-voltage circuit breaker (1) having a holding device (2) in the form of a suspension for a vacuum interrupter (3), wherein the vacuum interrupter (3) is arranged in a cylindrical insulator (4) and the vacuum interrupter (3) is spatially fixed in the insulator (4) by the holding device (2) and is electrically connected to a connector (5) outside the high-voltage circuit breaker (1),

characterized in that the holding device (2) comprises a hollow cylindrical region with a wall (6) having at least one opening (7, 8).

2. High voltage power switch (1) according to claim 1,

the vacuum interrupter (3) and the cylindrical insulator (4) have a common longitudinal axis, which is arranged in particular parallel to the force of gravity.

3. High voltage power switch (1) according to one of the preceding claims,

the holding device (2) is designed in the form of a pot having a cylindrical region which is closed by a base (9) to which the vacuum interrupter tube (3) is fastened, in particular mechanically.

4. High voltage power switch (1) according to one of the preceding claims,

the holding device (2) is designed in the form of a pot having a closure cap (9) by means of which the hollow cylindrical region of the holding device (2) and/or the insulator (4) is closed in a fluid-tight manner on one side, wherein the closure cap (10) comprises in particular a rupture disk (11).

5. High voltage power switch (1) according to one of the preceding claims,

characterized in that the holding device (2) comprises a shielding structure (12) for an end region (13) of the vacuum interrupter (3) for electrical contacting, in particular a hollow-cylindrical shielding structure (12) on an end (14) of the holding device (2) at the bottom.

6. High voltage power switch (1) according to one of the preceding claims,

characterized in that the wall (6) has a strengthened region (15) comprising a greater wall thickness than an unreinforced region.

7. High voltage power switch (1) according to one of the preceding claims,

characterized in that the hollow cylindrical region of the holding device (2) comprises a filter material (16), in particular for absorbing liquid and/or gaseous contaminants.

8. High voltage power switch (1) according to one of the preceding claims,

characterized in that, in particular, clean air is included as an insulating gas in the interior of the insulator (4).

9. High voltage power switch (1) according to one of the preceding claims,

characterized in that at least one opening (7) is formed in the base (9) of the holding device (2), in particular for dissipating heat from the contacts of the vacuum interrupter (3).

10. High voltage power switch (1) according to one of the preceding claims,

characterized in that at least one opening (8) is formed in the wall (6) of the holding device (2), in particular for fluidly connecting a gas space between the insulator (4) and the holding device (2) with a hollow cylindrical region in the interior of the holding device (2).

11. High voltage power switch (1) according to one of the preceding claims,

characterized in that it comprises at least two external electrical connections (5) in the form of lugs, in particular at least one external electrical connection (5) of the high-voltage circuit breaker (1) at each end of a cylindrical insulator (4), wherein the at least one external electrical connection (5) is electrically connected, in particular directly connected, to an electrical fixed contact of a vacuum interrupter (17) by means of a holding device (2).

12. High voltage power switch (1) according to one of the preceding claims,

characterized in that the holding device (2) is constructed in one piece.

13. Method for holding a vacuum interrupter (3) in a cylindrical insulator (4) of a high-voltage circuit breaker (1), in particular a high-voltage circuit breaker (1) according to one of the preceding claims, in which method the vacuum interrupter (3) is spatially fixed in the insulator (4) by means of a hollow cylindrical holding device (2) and is electrically connected to a connector (5) on the outside of the high-voltage circuit breaker (1), and the vacuum interrupter (3) is suspended downwards on the holding device (2).

14. The method of claim 13, wherein the first and second light sources are selected from the group consisting of,

characterized in that the holding device (2) discharges a large amount of heat from the vacuum interrupter (3), in particular from the interior of the insulator (4), to the environment of the high-voltage circuit breaker (1) when the high-voltage circuit breaker (1) is in operation.