High-voltage circuit breaker and method for manufacturing the same

Abstract

The present invention relates to a high-voltage circuit breaker (1) comprising at least one vacuum interruption valve (2) supported by at least one holder (3, 4) of the high-voltage circuit breaker (1), and to a method for manufacturing the high-voltage circuit breaker, wherein the at least one vacuum interruption valve (2) is inseparably connected to the at least one holder (3, 4), via an intermediate part, in particular by electron beam welding of the same material and / or by explosive welding and / or roll joining of dissimilar materials.

Description

[Technical field]

[0001] The present invention relates to a high voltage circuit breaker comprising at least one vacuum interrupt valve carried by at least one holder of the high voltage circuit breaker, and to a method for manufacturing the high voltage circuit breaker.

[0002] The high-voltage circuit breaker is designed to interrupt voltages in the voltage range up to 1200 kV and current range up to several thousand amperes. It comprises, for example, a housing with at least one switching contact on a support. The housing is, for example, an insulator, in particular made of ceramic, silicone and / or composite material, for example a cylindrical hollow body, in particular provided with a number of umbrella-shaped ribs on the outer periphery in order to extend the creepage current. In contrast to the insulator-type high-voltage circuit breaker, the tank-type high-voltage circuit breaker has a grounded housing, which is, for example, a hollow cylindrical metal tank, in which at least one switching contact is arranged.

[0003] The switching contacts comprise at least two contacts, for example one fixed contact and one movable contact, which are made of a conductive material, for example steel, aluminum and / or copper. Alternatively or additionally, a switching contact may comprise for example at least two movable contacts. In this case, an embodiment with two movable contacts is similar to the one fixed contact and one movable contact of the present invention and will not be described further below for the sake of brevity. The contacts of the switching contacts are arranged in the high-voltage circuit breaker or are supported by a number of holders, in particular movably or fixedly supported, and in particular hermetically sealed by a housing.

[0004] The housing is filled with an insulating or interrupting gas, in particular SF6 and / or clean air. The switching contacts, which include, for example, rated current contacts and / or arcing contacts, are electrically insulated by the interrupting gas from certain devices of the high-voltage circuit breaker, for example from the driving device and surroundings. Interrupting gases such as SF6 can be hazardous to the weather and / or contain toxic components. To prevent the interrupting gas from escaping from the high-voltage circuit breaker, a gas-tight and permanent seal of the housing is required, which is complex, expensive and costly. Environmentally friendly disposal of the interrupting gas, in particular, at the end of the life of the high-voltage circuit breaker is also complex and costly. An environmentally friendly alternative is to use a vacuum valve in the typical housing described above.

[0005] The use of a typical housing as described above allows for easy and cost-effective replacement of high voltage circuit breakers in power systems, and particularly for easy and cost-effective manufacture of large numbers of high voltage circuit breakers. To replace environmentally harmful interrupting gases, such as SF6, with environmentally friendly interrupting gases, such as clean air, i.e., dry and purified air, it is necessary to replace the rated current system and the arcing contact system with a vacuum interrupter in order to maintain the required insulation distance in a typical housing.

[0006] The vacuum shut-off valve is arranged and connected in a mechanically stable and electrically conductive manner inside the housing between at least two external electrical connections, said electrical connections being formed, for example, in the form of connection terminals for the connection of high-voltage cables, generators and / or users of electricity.

[0007] The construction of a vacuum shutoff valve for a high-voltage circuit breaker is known, for example, from US Pat. No. 5,399,633. The vacuum shutoff valve comprises a circular, straight cylindrical housing, the inside of which is evacuated. The housing consists of two identical halves, for example straight cylindrical, made of ceramic or ceramic parts, which are connected in the middle of the housing with transition pieces via a metal cylinder or a metal part. The transition pieces are designed as shield electrodes or shields in the housing.

[0008] The vacuum interruption valve has at least one electrical contact for opening and closing, which has one fixed contact and one movable contact, which are configured in a dish-like manner in the vacuum interruption valve and are vacuum-sealed, the contacts are guided outwards in the form of a bolt and are each connected to an external electrical connection, for example in the form of a connection terminal of a high-voltage circuit breaker, the movable contact being guided and supported in a vacuum-tight manner in the vacuum interruption valve via a bellows so as to be movable.

[0009] When closing, the movable contact moves towards the fixed contact until mechanical and electrical contact between them is established. When breaking, the movable contact is moved away from the fixed contact until the electrical contact between them is interrupted and there is a sufficient distance between them to avoid electrical flashover at the applied voltage. A large distance between the contacts is necessary at high voltages. The vacuum interruption valve is made long in order to ensure a sufficient distance inside. The straight cylindrical half of the vacuum interruption valve, made of ceramic or ceramic parts, consists of several parts, for example, which are connected with several transitions via several metal parts. These transitions are respectively made as shield electrodes or shields in the housing. The joining of the ceramic parts of the housing via metal parts, made of, for example, copper and / or steel, is carried out, for example, by brazing.

[0010] The connection of the contacts of the vacuum interrupter to, in particular, holders for supporting the contacts, and thus to the drive and / or fixed conductive parts of the high-voltage circuit breaker, is effected by clamping connections. These holders are, for example, made of aluminum and / or steel. Aluminum has a low mass, which allows the accelerations of the drive to be transmitted to the moving contact with little energy consumption, and moreover the fixed contacts can be fixed simply and inexpensively in the high-voltage circuit breaker in a lightweight holder. The contacts of the vacuum interrupter are, for example, made of copper for high current carrying properties. The connection of the contacts to the respective holder is effected by clamping connections, in particular between the aluminum and the copper parts. The mating clamping connections include two electrical contact points, which lead to excessive heating and electrical losses in the circuit breaker. At very high currents, which can reach several thousand amperes, very high electrical losses can occur and high temperatures in the circuit breaker can lead to damage and / or destruction. Clamping connections, which are, for example, crimped by screwing, are removable and are technically complex, which leads to a high failure rate and high costs. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] European Patent Application Publication No. EP0102317A2 Summary of the Invention [Problem to be solved by the invention]

[0012] The object of the present invention is to provide a high-voltage circuit breaker that solves the above-mentioned problems, and a method for manufacturing the high-voltage circuit breaker, particularly the above-mentioned high-voltage circuit breaker. In particular, the object of the present invention is to provide a high-voltage circuit breaker in which at least one vacuum cutoff valve is arranged and supported in a mechanically stable manner, and which has small electrical loss in a closed state and small heat generation, particularly when a large current flows. [Means for solving the problem]

[0013] This problem is solved by a high-voltage circuit breaker having the features of patent claim 1 and / or by a method for producing a high-voltage circuit breaker, in particular the aforementioned high-voltage circuit breaker, according to patent claim 11. Advantageous configurations of the high-voltage circuit breaker according to the invention and / or of the method for producing a high-voltage circuit breaker according to the invention, in particular the aforementioned high-voltage circuit breaker, are set out in the dependent claims. The subject matters of the main claims can be combined with one another and with the features of the dependent claims, and the features of the dependent claims can be combined with one another.

[0014] The high voltage circuit breaker according to the present invention comprises at least one vacuum shutoff valve, which is supported by at least one holder of the high voltage circuit breaker, and the at least one vacuum shutoff valve is inseparably connected to the at least one holder.

[0015] In contrast to separable or reattachable clamped and / or screwed connections, the non-separable connection between the at least one vacuum interrupting valve and the at least one holder allows a good current flow with high mechanical stability and low contact resistance, which leads to lower temperatures, lower electrical losses and less heat generation than clamped and / or screwed connections, especially in the case of high currents in the range of up to several thousand amperes. Damage and / or destruction of the high-voltage circuit breaker with vacuum interrupting valve can thus be avoided or prevented. The non-separable connection can be easily and inexpensively implemented, and its high mechanical stability leads to a high durability and service life as well as a high reliability of the high-voltage circuit breaker.

[0016] The at least one vacuum shutoff valve may have at least one fixed contact and at least one movable contact, and may include at least one holder on the side of the at least one fixed contact and at least one holder on the side of the at least one movable contact. Alternatively or additionally, it may include two movable contacts. By inseparably coupling the at least one fixed contact and / or the at least one movable contact to a respective holder, the above-mentioned advantages may be realized.

[0017] The at least one vacuum shutoff valve can be inseparably connected to the at least one holder by a welded connection, in particular by an electron beam welded connection. A welded connection, in particular an electron beam welded connection, has high mechanical stability, is easy and cheap to produce, and allows good current flow through the welded connection with low electrical losses and low heat generation, in particular at high currents.

[0018] The at least one vacuum shutoff valve can be inseparably connected to the at least one holder by means of an intermediate part in each case, which allows a simple, inexpensive and mechanically stable connection between the contacts of the vacuum shutoff valve and the holder with a particularly low contact resistance.

[0019] This intermediate part can comprise at least two parts, in particular exactly two parts, in particular a part made of copper and a part made of aluminum, which two parts are inseparably connected to one another in particular material-bonded, in particular by explosive welding and / or roll bonding.An intermediate part having the above-mentioned properties allows a mechanically stable connection of the contact and the holder of the vacuum interrupter valve at low cost and with a particularly low contact resistance.

[0020] In particular, by explosive welding and / or roll-bonding of two parts, in particular an aluminum part and a copper part, an intermediate part is produced which has a high mechanical stability and a low electrical resistance.

[0021] The at least one vacuum interruption valve, in particular the at least one fixed contact and the at least one movable contact of the at least one vacuum interruption valve, can each be connected to an intermediate part, in particular by electron beam welding, and / or the intermediate part can comprise two parts of different materials, which can be inseparably connected to one another in a material-bonding manner by explosive welding and / or roll-bonding, and / or the intermediate parts can each be inseparably connected to at least one holder, in particular by electron beam welding. This leads to the above-mentioned advantages, in particular to a high-voltage circuit breaker with high reliability and durability, which in the closed state has low electrical losses through the high-voltage circuit breaker, which generates less heat and therefore has a low risk of damage and / or destruction of the high-voltage circuit breaker due to excess heat that cannot be released to the outside sufficiently quickly.

[0022] The at least one vacuum shutoff valve, in particular the at least one fixed contact and the at least one movable contact of the at least one vacuum shutoff valve, can be made of and / or contain copper, and / or the intermediate part can contain a copper part, which can be inseparably connected to the copper of the vacuum shutoff valve, in particular by electron beam welding, and / or the holder can be made of and / or contain aluminum, respectively, and / or the intermediate part can contain an aluminum part, which can be inseparably connected to the aluminum of the holder, in particular by electron beam welding. A stable material-bonding connection between aluminum and copper is difficult to produce. An intermediate part having two parts, i.e. an aluminum part and a copper part, can be produced easily and inexpensively by explosive welding and / or roll joining. In particular, electron beam welding between aluminum and aluminum and between copper and copper is possible easily and inexpensively without mechanical load, as for example by explosive welding and / or roll joining. In particular, by using intermediate parts produced by explosive welding and / or roll welding, a material-bonded connection between the vacuum shut-off valve and the holder is possible simply and inexpensively, without mechanical stress and destruction of the vacuum shut-off valve and / or the holder, and has the above-mentioned advantages.

[0023] The high voltage circuit breaker may be configured to switch voltages ranging from a few kV to 1200 kV. The above-mentioned advantages arise particularly in the case of high voltage circuit breakers configured to switch the above-mentioned current and / or voltage ranges.

[0024] The high-voltage circuit breaker may contain a barrier gas, in particular SF6 and / or clean air, and the vacuum interruption valve and / or the at least one holder may be spatially surrounded by the barrier gas, so that a safe operation of the vacuum interruption valve in the high-voltage circuit breaker is possible and good electrical insulation is obtained, in particular for parts not intended for the flow of current for safety reasons.

[0025] The at least one holder can be configured for a particularly mechanically stable arrangement of the vacuum interruption valve in a housing, in particular a closed insulator housing, in particular by means of a spatially fixed holder and / or by means of a holder which can be movably driven, in particular via a drive device, which leads to the above-mentioned advantages of the high-voltage circuit breaker, in particular a high reliability and a long service life.

[0026] The method for manufacturing a high voltage circuit breaker, in particular the above-mentioned high voltage circuit breaker, according to the present invention comprises at least one vacuum shut-off valve supported by at least one holder, where the at least one vacuum shut-off valve is inseparably connected to the at least one holder, in particular by electron beam welding.

[0027] The at least one fixed contact and the at least one movable contact of the at least one vacuum shut-off valve, in particular comprising copper, can each be connected to an intermediate part, in particular by electron beam welding, and / or the intermediate part can comprise two parts of different materials, in particular copper and aluminum, in which case the two parts can be inseparably connected to one another in a material-bonding manner by explosive welding and / or roll joining, and / or the intermediate part can be inseparably connected to the at least one holder, in particular comprising aluminum, in particular by electron beam welding.

[0028] The copper portions of the intermediate parts can be joined with the copper of the contacts of the vacuum interrupter valve, and the aluminum portions of the intermediate parts can be joined with the aluminum of the holder.

[0029] The advantages of the method for manufacturing the high voltage circuit breaker according to claim 11, in particular the high voltage circuit breaker described above, are similar to the advantages described above for the high voltage circuit breaker according to claim 1 and vice versa.

[0030] An embodiment of the present invention will be described in more detail below with reference to FIGS. 1 to 3. FIG. [Brief description of the drawings]

[0031] [Figure 1] FIG. 1 is a schematic cross-sectional side view of a high-voltage circuit breaker 1 according to the present invention, showing a vacuum shut-off valve 2 supported by two holders 3, 4, with multiple contacts of the vacuum shut-off valve 2 coupled to the holders 3, 4 via multiple intermediate parts 7, respectively. [Diagram 2] 4 is an enlarged schematic diagram of a cross section of an intermediate part 7 between a fixed contact of the vacuum cutoff valve 2 and a holder 3. FIG. [Diagram 3] 1 is a schematic enlarged cross-sectional view of an intermediate part 7 between a moving contact of a vacuum shutoff valve 2 and a holder 4 , which has a moving contact disk 5 in a fixed holder sleeve 6 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] FIG. 1 is a schematic cross-sectional side view of a part of a high-voltage circuit breaker 1 according to the invention. The high-voltage circuit breaker 1 comprises a vacuum interruption valve 2 with two holders 3 and 4. The vacuum interruption valve 2 is configured for switching up to 35 kV and / or up to 145 kV. For the sake of simplicity, the individual elements or parts of the vacuum interruption valve 2 are not shown in detail in the drawing. The vacuum interruption valve 2 is, for example, cylindrical and comprises a number of conductive contacts, in particular a moving contact and a fixed contact, for example made of copper, protruding at their ends from a ceramic evacuated hollow insulator, the moving contact side of which is hermetically sealed by a metal bellows and the fixed contact side by a fixed metal disk or a fixed metal lid. The vacuum interruption valve comprises a number of other elements or parts, such as, for example, a shield electrode, which will not be described in detail below.

[0033] The end of the fixed contact, which in FIG. 1 forms one end of the left side of the vacuum shut-off valve 2, is electrically conductively connected to a spatially fixed holder 3. This connection is shown on an enlarged scale in FIG. 2. The fixed holder 3 is, for example, in the form of a hollow pipe, which at one end has an outwardly guided fixed flange and at the other end has an inner fixed plate or disk with a number of ventilation openings. The holder 3 is, for example, made of aluminum. A mechanically stable and well-conductive connection between the vacuum shut-off valve 2, i.e. in particular a copper contact and the in particular aluminium holder 3, is difficult to establish using typical, in particular snap-on clamp connections. According to the invention, a mechanically stable and well-conductive connection between the vacuum shut-off valve 2 and the contact of the holder 3 is established by a permanent, i.e. inseparable, connection.

[0034] Inseparable in this context means that the connection cannot be released without material destruction, unlike screw and / or clamp connections which can be repeatedly attached and detached without permanent material destruction. The material-bonded, well-conductive connection between the contact of the vacuum shutoff valve 2 and the holder 3 is effected via an intermediate part 7, which is made, for example, by explosive welding and / or roll-bonding. In this case, in particular, two cylindrical disks are connected by explosive welding and / or roll-bonding, one of which has the diameter of the copper contact of the vacuum shutoff valve 2 and the side of the holder 3 has in particular the same diameter as the ledge of the inner fixing plate or fixing disk with the multiple ventilation openings. One disk is made, for example, of copper, the other disk, for example, of aluminum. The intermediate part 7 to which these two disks are connected is therefore on one side made of a first material 8, in particular made of copper, and on the other side made of a second material 9, in particular made of aluminum. This intermediate part 7 therefore has two parts 8 and 9 of different materials, in particular copper and aluminium, which are joined to one another in a mechanically stable, well-electrically conductive and inseparable manner by explosive welding and / or roll bonding.

[0035] The first material 8 side, i.e. in particular the copper part, is mechanically stable, well-conductive and inseparably connected, for example by electron beam welding, to the fixed contact of the vacuum interruption valve 2. The second material 9 side, i.e. in particular the aluminum part, is mechanically stable, well-conductive and inseparably connected, for example by electron beam welding, to the holder 3. These welded connections 10, in particular electron beam welded connections, are mechanically strong, stable, permanent, i.e. inseparable and have a low contact resistance, i.e. good electrical conductivity. As a result, the fixed contact of the vacuum interruption valve 2 is mechanically fixed, stable, permanent, i.e. inseparable and also well-conductively connected to the fixed holder 3, and a large amount of heat generation or a large temperature rise at the connection, which could lead to a breakage and / or failure of the high-voltage circuit breaker 1, in particular at high currents in the range of several thousand amperes, is avoided.

[0036] In FIG. 3, one end of the movable contact of the vacuum shut-off valve 2 is shown together with a holder 4. This holder 4 has a hollow-pipe-shaped, spatially fixed holder sleeve 6, which on one side has, in particular, a flange that is pulled outwards and on the other side the vacuum shut-off valve is snap-fitted into this hollow pipe and is hermetically sealed, for example, with a seal, and the end of the movable contact projects into this hollow pipe. On the side of the holder 3, the end of the fixed contact of the vacuum shut-off valve 2 likewise projects into the hollow-pipe-shaped holder 3 and is snap-fitted into this hollow pipe and is hermetically sealed, for example, with a seal, as can be seen, for example, in the enlarged views of FIGS. 1 and 2. In FIG. 3, the holder 4 into which the vacuum shut-off valve 2 is inserted is shown enlarged. In this case, in addition to the holder sleeve 6, the holder 4 has a movable contact medium 5, in particular a contact disk or an inner contact sleeve, which is movably supported in the spatially fixed holder sleeve 6 and is connected, for example, via a drive rod, to a drive device. This is not shown in the drawings for the sake of simplicity. The movable contact medium 5 can be driven via a drive when opening and closing and, in particular, when moving, slides in a telescopic manner in the fixed holder sleeve 6. The holder 4 can thus be driven movably via a drive, i.e. the movable contact medium 5 can be moved in the fixed holder sleeve 6 when opening and closing, in particular, via the drive.

[0037] The end of the moving contact, which in FIG. 1 forms one end of the right side of the vacuum shutoff valve 2, is conductively connected to the holder 4, in particular to the moving contact medium 5. In FIG. 3, the connection is shown on an enlarged scale. The holder 4 is made, for example, of aluminum, i.e. the fixed holder sleeve 6 and / or the moving contact medium 5 are made of aluminum. A mechanically stable and well-conductive connection between the vacuum shutoff valve 2, i.e. the moving contact, in particular made of copper, and the holder 4, i.e. the moving contact means 5, in particular made of aluminum, is difficult to establish using a typical, in particular snap-on clamp connection. According to the invention, a mechanically stable, material-bonded and well-conductive connection between the contact of the vacuum shutoff valve 2 and the holder 4, in particular the moving contact medium 5, is established by a permanent, i.e. inseparable connection.

[0038] In this context, inseparable, as used above and below, means that the connection cannot be released without material destruction, unlike screw and / or clamp connections which can be repeatedly attached and detached without permanent material destruction. The material-bonded, well-conductive connection of the contact of the vacuum shut-off valve 2 with the holder 4, in particular with the moving contact medium 5, is effected via the intermediate part 7, which is obtained for example by explosive welding and / or roll-bonding. In this case, in particular two cylindrical disks are connected by explosive welding and / or roll-bonding, in particular one having the diameter of the copper contact of the vacuum shut-off valve 2 and in particular the same diameter as the ledge of the moving contact medium 5, in particular of the contact disk or the inner contact sleeve. One disk of the intermediate part 7 is made for example of copper, and one disk of the intermediate part 7 is made for example of aluminum. The intermediate part 7 with the two disks connected thus has on one side a first material 8, in particular copper, and on the other side a second material 9, in particular aluminum. This intermediate part 7 thus has, as described above for the intermediate part 7 of the holder 3, two parts 8 and 9 of different materials, in particular copper and aluminium, which are mechanically stable, well-electrically conductive and inseparably joined to one another, for example by explosive welding and / or roll bonding.

[0039] The side of the first material 8, i.e. in particular the copper part, is mechanically stable, well-conductive and inseparably connected to the moving contact of the vacuum interruption valve 2, for example by electron beam welding. The side of the second material 9, i.e. in particular the aluminum part, is mechanically stable, well-conductive and inseparably connected to the holder 4, for example by electron beam welding. These welded connections 10, in particular electron beam welded connections, are mechanically strong, stable, permanent, i.e. inseparable and have a low contact resistance, i.e. good electrical conductivity. As a result, the moving contact of the vacuum interruption valve 2 is mechanically fixed, stable, permanent, i.e. inseparable and also well-conductively connected to the fixed holder 4, in particular the moving contact medium 5, so that a large amount of heat generation or a large temperature rise at the connection, which could lead to a breakage and / or failure of the high-voltage circuit breaker 1, is avoided, in particular at high currents in the range of several thousand amperes.

[0040] The vacuum interruption valve 2, in particular the fixed and movable contacts of this vacuum interruption valve 2, which are made of and / or contain copper, and the respective intermediate part 7, which includes, for example, a copper part, are inseparably connected, in particular via parts of the same material, in particular by electron beam welding. The holders 2 and 3, which are made of and / or contain aluminum, are inseparably connected, in particular via parts of the same material, in particular by electron beam welding, to the respective intermediate part 7, which includes an aluminum part. The parts 8 and 9 of the respective intermediate part 7 are inseparably connected to one another, in particular by explosive welding and / or roll bonding, in particular by bonding together parts of dissimilar materials. In this way, an inseparable connection is established between the vacuum interruption valve 2, in particular the fixed and movable contacts of the vacuum interruption valve 2, and the respective holders 3, 4 via the respective intermediate parts 7, which has good electrical properties, i.e. has a high electrical conductivity with low electrical resistance. Due to the good electrical conduction through the high-voltage circuit breaker 1 in the closed state, the risk of excessive heating, in particular at the connection points, and the risk of damage and / or destruction due to excessive heating is minimized. The large mechanical forces during opening and closing or due to the opening and closing operation are compensated for by the inseparable, mechanically strong and stable mechanical connection between the holders 3 and 4 and the vacuum cutoff valve 2, and do not lead to destruction of the high-voltage circuit breaker 1.

[0041] The above-mentioned embodiments can be combined with each other and / or with the prior art. For example, the high-voltage circuit breaker 1 has a housing, which is not shown in the drawings for simplicity, which is filled with a breaker gas, in particular SF6 and / or clean air. The housing is, for example, a hermetically sealed hollow insulator made of ceramic, silicone and / or composite material, and is provided with ribs on the outer periphery, in particular for reducing creepage currents. Alternatively, the housing is, for example, a hermetically sealed metal tank, which is electrically earthed. For electrically connecting the high-voltage circuit breaker 1 to the power system, in particular to the power generator and / or the power consumer and / or the power cable, a number of connection terminals are guided, for example from the housing to the outside, by a number of holders. The high-voltage circuit breaker 1 further has, for example, a support for placing the high-voltage circuit breaker 1, for example on a foundation. Furthermore, the high-voltage circuit breaker has, for example, a drive, in particular a spring drive, and elements of a movement mechanism, for example a gear and at least one drive rod, for driving the moving contact when opening and closing.

[0042] The high-voltage circuit breaker 1 comprises one moving contact and one fixed contact, but alternatively or additionally can comprise further contacts and / or at least two moving contacts. The contacts are made of copper. Alternatively or additionally can comprise other materials, for example steel and / or aluminum, and furthermore the intermediate part 7 can comprise a first material, for example also steel and / or aluminum, on the side of the face 8. The holder is made of aluminum. Alternatively or additionally can comprise other materials, such as steel and / or copper, and the intermediate part 7 can comprise a second material, for example also steel and / or copper, on the side of the face 9. The two different materials of the vacuum shut-off valve 2 and the holder 3, 4 are inseparably connected to each other via the intermediate part 7, which in particular consists of two circular disks. Alternatively or additionally, other shapes can be selected, for example cylinders and / or hollow bodies with a square cross section. The two materials of the intermediate part 7 can be joined together with a clearly defined separation and / or can be continuously transitioned into one another, for example by material diffusion of the materials into each other, for example by heat treatment. [Explanation of symbols]

[0043] 1 High voltage circuit breaker 2 Vacuum shutoff valve 3 Fixed contact holder 4 Movable contact holder 5 Moving contact media, especially contact discs 6 Holder Sleeve 7 Intermediate parts 8 First material side 9 Second material side 10 Welded Connection

Claims

1. A high-voltage circuit breaker (1) having at least one vacuum shutoff valve (2), the vacuum shutoff valve (2) being supported by at least one holder (3, 4) of the high-voltage circuit breaker (1), the at least one vacuum shutoff valve (2) is connected to the at least one holder (3, 4) by means of an intermediate part (7) in each of the at least one holders (3, 4), said intermediate part (7) comprising at least two parts, The two parts are inseparably connected to one another by a material bond. A high voltage circuit breaker (1).

2. The at least one vacuum shutoff valve (2) has at least one fixed contact and at least one movable contact; At least one holder (3) is provided on the side of the at least one fixed contact, and at least one holder (4) is provided on the side of the at least one movable contact. A high voltage circuit breaker (1) according to claim 1.

3. 3. The high-voltage circuit breaker (1) according to claim 1 or 2, characterized in that the at least one vacuum shut-off valve (2) is inseparably connected to the at least one holder (3, 4) by a welded connection (10).

4. the at least one vacuum shutoff valve (2) is connected to the intermediate part (7); and / or the intermediate part (7) comprises two parts of different materials, the two parts of different materials being inseparably connected to one another in a material-bonding manner by explosive welding and / or roll bonding, and / or said intermediate parts (7) are each inseparably connected to said at least one holder (3, 4); A high voltage circuit breaker (1) according to any one of claims 1 to 3.

5. The at least one vacuum shutoff valve (2), wherein a fixed contact and a movable contact of the at least one vacuum shutoff valve (2) are made of copper and / or contain copper; and / or the intermediate part (7) includes a copper part, the copper part being inseparably connected to the copper of the vacuum shutoff valve (2); and / or said holders (3, 4) are each made of and / or contain aluminium, and / or the intermediate part (7) comprises an aluminium part, said aluminium part being inseparably connected to the aluminium of said holder (3, 4); A high voltage circuit breaker (1) according to any one of claims 1 to 4.

6. 6. A high voltage circuit breaker (1) according to any one of claims 1 to 5, characterized in that it is adapted to switch voltages in the range from a few kV to 1200 kV.

7. The high-voltage circuit breaker (1) according to any one of claims 1 to 6, characterized in that the high-voltage circuit breaker (1) contains a barrier gas and / or clean air, and the vacuum shut-off valve (2) and / or the at least one holder (3, 4) are spatially surrounded by the barrier gas.

8. The high-voltage circuit breaker (1) according to any one of claims 1 to 7, characterized in that the at least one holder (3, 4) is configured to arrange the vacuum shut-off valve (2) in a mechanically stable manner within the housing.

9. A method for manufacturing a high-voltage circuit breaker (1) according to any one of claims 1 to 8, comprising at least one vacuum shutoff valve (2) supported by at least one holder (3, 4), comprising the steps of: said at least one vacuum shutoff valve (2) is coupled to said at least one holder (3, 4); A method comprising:

10. The copper part of the intermediate part (7) is joined to the copper of the contact of the vacuum interruption valve (2); the aluminum part of the intermediate part (7) is joined to the aluminum of the holder (3, 4); 10. The method of claim 9.

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