High-voltage circuit breaker with shrink connection and method for manufacturing a high-voltage circuit breaker

Abstract

The invention relates to a high-voltage circuit breaker (1) and to a method for producing a high-voltage circuit breaker (1), the high-voltage circuit breaker having at least one vacuum switching tube (2) which is supported by at least one holding element (5, 6) of the high-voltage circuit breaker (1), wherein the vacuum switching tube (2) comprises at least two contact elements (3, 4) which are connected to the at least one holding element (5, 6). The at least one contact element (3, 4) is directly connected to the at least one holding element (5, 6) by a shrink connection.

Description

Technical Field

[0001] The present invention relates to a high-voltage circuit breaker and a method for manufacturing the high-voltage circuit breaker, the high-voltage circuit breaker having at least one vacuum switch tube supported by at least one retainer of the high-voltage circuit breaker, wherein the vacuum switch tube includes at least two contacts connected to at least one retainer. Background Technology

[0002] High-voltage circuit breakers are designed for switching voltages up to 1200 kV and currents up to several thousand amperes. A high-voltage circuit breaker includes, for example, a housing with at least one switching contact on a carrier. The housing is, for example, an insulator made particularly of ceramic, silicone, and / or composite materials, constructed, for example, in the form of a hollow cylindrical body, particularly with umbrella-shaped ribs on the outer circumference to extend leakage current. Unlike live-tank high-voltage circuit breakers, in dead-tank high-voltage circuit breakers, the housing is grounded and is, for example, made of a hollow cylindrical metal can, with at least one switching contact arranged inside the metal can.

[0003] The switch contact includes at least two contacts, such as a fixed contact and a movable contact made of a conductive material, such as steel, aluminum, and / or copper. Alternatively or additionally, the switch contact may include, for example, at least two movable contacts, wherein embodiments having two movable contacts are similar to the fixed and movable contacts related to the present invention, and for simplicity, will not be described further below. The contacts of the switch contact are arranged in a high-voltage circuit breaker, or supported in a high-voltage circuit breaker by a retainer, particularly in a movable or fixed manner, and are particularly hermetically surrounded by a housing.

[0004] The housing is filled with insulating or switching gas, especially And / or clean air. Switching contacts, for example, include rated current contacts and / or arc contacts, and are electrically insulated from specific high-voltage circuit breaker components (e.g., actuators) and the environment by switching gas. Switching gas, for example... Harmful to the environment and / or potentially containing toxic components. To prevent leakage of switching gases from high-voltage circuit breakers, a durable, airtight seal of the enclosure is required, which is complex, costly, and intensive. Environmentally friendly disposal of switching gases at the end of the high-voltage circuit breaker's lifespan is also costly and intensive. An environmentally friendly alternative is the use of vacuum tubes in the conventional enclosure described above.

[0005] As mentioned above, using conventional housings allows for simple and cost-effective replacement of high-voltage circuit breakers in the network, and also enables simple and cost-effective, especially large-scale, manufacturing of high-voltage circuit breakers. Environmentally friendly switching gases, such as clean air (i.e., dry, clean air), are used instead of environmentally harmful switching gases, such as… It is necessary to replace the rated current and arc contact system with a vacuum switch tube in a conventional housing used to maintain the necessary insulation distance.

[0006] Vacuum switch tubes are mechanically and electrically arranged and connected within a housing between at least two external electrical connectors, wherein the connectors, for example in the form of terminal blocks, are configured for connection to high-voltage lines, generators, and / or electrical equipment. The structure of a vacuum switch tube for a high-voltage circuit breaker is known, for example, from EP 0 102 317 A2. The vacuum switch tube comprises a housing in the form of a circular, straight cylinder, which is evacuated internally. The housing is, for example, composed of two identical straight cylindrical halves made of ceramic or ceramic portions, joined together by a metal cylinder or by a metal portion with a transition piece in the middle of the housing. The transition piece is implemented within the housing as a shielding electrode or shielding portion.

[0007] For switching purposes, the vacuum switch tube includes at least one electrical contact, which has a fixed contact and a movable contact. The contact is designed in a dish shape within the vacuum switch tube and is surrounded by a vacuum. The contact is bolted outward and electrically connected to external electrical terminals, such as terminal blocks of a high-voltage circuit breaker. The movable contact is movably guided and supported within the vacuum switch tube in a vacuum-sealed manner via a bellows.

[0008] When switched on, the movable contact moves toward the fixed contact until mechanical and electrical contact are established between the contacts. When switched off, the movable contact moves away from the fixed contact until the electrical contact between the contacts is broken and sufficient distance is maintained to prevent electric flashover under applied voltage. A large distance between the contacts is necessary under high voltage conditions. The vacuum switch tube is designed to be long to ensure sufficient internal clearance. The housing of the vacuum switch tube, consisting of a straight cylindrical half made of ceramic or ceramic parts, is composed of multiple sections joined together by metal sections with transition pieces. These transition pieces are designed as shielding electrodes or shielding portions within the housing. The ceramic sections of the housing are joined by metal sections, for example, made of copper and / or steel, for example, by welding.

[0009] The coupling of the contacts of the vacuum switch tube, particularly with the retainer used to support the contacts and thus with the actuator and / or fixed conductive components of the high-voltage circuit breaker, is achieved via clamp connections. The retainer is made, for example, of aluminum and / or steel. Aluminum has a light weight, which allows for the transfer of actuator acceleration to the movable contacts with low energy expenditure, and allows for the simple and cost-effective securing of fixed contacts in the high-voltage circuit breaker using the light weight of the retainer. The contacts of the vacuum switch tube, used for high current-carrying capacity, are made, for example, of copper. The connection between the contacts and the corresponding retainers is established, particularly between the aluminum and copper portions, via clamp connections. Clamp connections include electrical transition points that generate higher heat generation and electrical losses in the switch. Very high electrical losses can occur at very high currents, up to several thousand amperes, and the high temperatures in the switch can lead to damage and / or failure. Clamp connections, for example, pressed together by threaded connections, are releasable and technically expensive, thus associated with high error rates and high costs. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a high-voltage circuit breaker and a method for manufacturing the high-voltage circuit breaker, especially the high-voltage circuit breaker described above, which solves the problems described above. In particular, the technical problem to be solved is to provide a high-voltage circuit breaker in which at least one vacuum switching tube is arranged or supported in a mechanically stable manner with low overhead and low error variability, low electrical loss in the on state, and minimal heat generation, especially under high current.

[0011] According to the present invention, the technical problem is solved by a high-voltage circuit breaker having the features of the present invention and / or by a method for manufacturing a high-voltage circuit breaker according to the present invention, especially the high-voltage circuit breaker described above. Advantageous designs of the high-voltage circuit breaker according to the present invention and / or the method for manufacturing a high-voltage circuit breaker according to the present invention, especially the high-voltage circuit breaker described above, are given in the following description. Here, the subject matter of the present invention can be combined with each other, or with the features described below, and the features described below can be combined with each other.

[0012] The high-voltage circuit breaker according to the present invention includes at least one vacuum switch tube, which is supported by at least one retainer of the high-voltage circuit breaker. The vacuum switch tube includes at least two contacts connected to the at least one retainer. The at least one contact and the at least one retainer are directly connected via a shrink-fit connection.

[0013] The shrink-fit connection enables a mechanically stable and electrically conductive connection between at least one contact and at least one retainer, which can be produced permanently, simply, and cost-effectively. The small transition resistance at the interface between the contact sleeve and at least one contact and at least one retainer allows for current flow, particularly up to several hundred amperes, especially with low heat generation at the connection surface and / or at the contact and retainer and their interface surfaces.

[0014] Clamped connections via tightened sleeves (as is common in the prior art) have more than one connection surface, resulting in high transition resistance and power loss at the connection surface, and lower mechanical stability compared to connections where one element is contracted onto another. By heating the element or component before contraction, the diffusion process at and across the connection surface can lead to a direct, inseparable connection with good conductivity and low resistance. The good thermal conductivity of the contracted connection allows for effective removal of excess heat from the vacuum switching tube, especially during switching. This reduces the probability of damage or even failure of the high-voltage circuit breaker and improves its durability.

[0015] The at least two contacts can be connected to at least one retainer, particularly to one retainer, respectively, via shrink-fit connections. This allows for a well-conducting connection across the high-voltage circuit breaker, particularly across the two contacts and across the retainer, when the high-voltage circuit breaker is closed. The shrink-fit connection provides high mechanical stability and good electrical performance, offering the advantages described above.

[0016] Shrink-fit connections can be achieved through heat shrinkage. Heat shrinkage can be performed simply and cost-effectively by heating at least one element or component and subsequently cooling it. A component, particularly cold or at room temperature, can be inserted into an opening in a heated component, and as the heated component cools, the dimensions of the heated component, and therefore the opening, shrink. In this way, a simple, cost-effective, mechanically robust, and electrically conductive connection can be established between cooled, particularly room-temperature components. Similarly, the cooling of a component and subsequent heating of the component, e.g., insertion into an opening in a component at room temperature, as well as combinations of cooling of a component and heating of another component, are also effective. By definition, connections established in this way are also described below as shrink-fit connections.

[0017] A shrink-fit connection can be designed to establish a mechanically stable direct electrical contact between at least one contact and at least one retainer. Direct contact enables exceptionally high mechanical stability and excellent electrical performance. This allows for a well-conducting connection across the high-voltage circuit breaker, particularly across the two contacts and across the retainer, in the closed state of the high-voltage circuit breaker, offering the advantages described above.

[0018] At least one retainer can retract onto at least one contact. This is advantageous when the contact is at least partially (e.g., at its end in its dimension, such as diameter) smaller than at least one retainer (in particular, when the opening in the retainer has a dimension of the same order of magnitude as the contact in that area).

[0019] At least one retainer may have an opening, particularly in the form of a cylinder or a truncated cone, especially a central opening. The opening of the at least one retainer may be constructed through. At least one contact member connected to the at least one retainer may at least partially have the shape of an opening. The at least one contact member connected to the at least one retainer may be arranged to protrude through the opening. This is technically simple to implement and makes it possible to use, for example, long contact members with particularly large manufacturing tolerances.

[0020] Alternatively or additionally, the opening of at least one retainer may be closed on one side. At least one contact that can be connected to at least one retainer may at least partially have an open shape. At least one contact that can be connected to at least one retainer may be arranged to protrude into the opening. A mechanically stable arrangement is thus possible, having an additional contact surface for good electrical and / or thermal transition, which exists on the closed surface.

[0021] The contact can be a movable contact, and the retainer can be a retainer of the movable contact. The retainer includes a fixed retainer sleeve and a slider movably supported within the retainer sleeve, wherein the movably supported slider retracts onto the movable contact. The mechanically stable connection between the movable contact and the slider enables reliable switching and rapid movement without disrupting the connection, and particularly through, for example, spring contacts and / or electrical sliding contacts between the slider and the retainer sleeve, enables good electrical and / or thermal conduction, especially from the contact across the slider and the retainer sleeve.

[0022] At least one contact may include and / or be made of copper. Copper has very high electrical conductivity (which is associated with low heat generation under high current flow), high thermal conductivity, and is mechanically stable. At least one retainer may include and / or be made of aluminum. Aluminum is cost-effective, lightweight, and has high electrical conductivity, high thermal conductivity, and high mechanical strength, although its conductivity is lower than that of copper. Especially in the case of retainers for movable contacts, the small weight enables high switching speeds with low energy consumption, particularly for the slider of the retainer.

[0023] At least one contact may be coated, particularly electrochemically deposited, with silver. At least one retainer may be coated, particularly electrochemically deposited, with silver. The silver coating enables good electrical and / or thermal contact, and especially during heat treatment, when using different materials, particularly when both materials are coated, resulting in bonding between the contact and the retainer. This forms a connection with good electrical, thermal, and mechanical properties, possessing the advantages described above.

[0024] A vacuum switch tube may include at least one fixed contact and at least one movable contact, wherein the fixed contact can be connected to a fixed retainer by retraction, and / or wherein the movable contact can be connected to a movable slide of the retainer by retraction, the movable slide being movably arranged within a fixed retainer sleeve of the retainer. Mechanically stable high-voltage circuit breakers are thus possible, having contacts that can be easily moved during switching with minimal energy expenditure, and possessing good electrical performance, particularly high conductivity and low resistance across the high-voltage circuit breaker in the closed state.

[0025] High-voltage circuit breakers can be designed for switching voltages ranging from several kilovolts up to 1200 kilovolts. The advantages described above are particularly advantageous under high current and / or high voltage conditions.

[0026] The present invention also relates to a method for manufacturing a high-voltage circuit breaker, particularly the high-voltage circuit breaker described above, the high-voltage circuit breaker having at least one vacuum switch tube supported by at least one retainer of the high-voltage circuit breaker, wherein the vacuum switch tube includes at least two contacts connected to at least one retainer, the method comprising that the connection between at least one contact and at least one retainer is, in particular, electrically and mechanically stable, directly performed by contraction.

[0027] Shrinkage can be achieved by thermal cooling of the retainer, especially the contact at room temperature, and / or thermal cooling of the contact at room temperature, especially the retainer.

[0028] The advantages of the method for manufacturing high-voltage circuit breakers according to the present invention, especially the high-voltage circuit breakers previously described, are similar to, and vice versa, the advantages of the high-voltage circuit breakers according to the present invention previously described. Attached Figure Description

[0029] Below, a high-voltage circuit breaker 1, based on the prior art and embodiments of the present invention, is schematically shown in... Figures 1 to 4 It is shown in the figure and described in more detail below.

[0030] Here,

[0031] Figure 1 A portion of a high-voltage circuit breaker 1 according to the prior art, as shown schematically in a partial cross-sectional view from one side, is illustrated, wherein the vacuum switch tube 2 is fastened to the retainer 3 by clamps, and

[0032] Figure 2 A high-voltage circuit breaker 1 according to the invention, having a vacuum switch tube 2, is schematically shown in cross-sectional view. The vacuum switch tube 2 is supported by retainers (5, 6) via two contacts (3, 4) of the vacuum switch tube 2, wherein the contacts (3, 4) are connected to the corresponding retainers (5, 6) via shrink-fit connections.

[0033] Figure 3 Schematic illustration in cross-section Figure 2 A portion of a high-voltage circuit breaker 1, the high-voltage circuit breaker 1 having a movable slider 7 connected to a movable contact 4 via a retractable connection, wherein the contact 4 is arranged in a closed opening on one side of the slider 7, and

[0034] Figure 4 A schematic cross-sectional view shows something similar to Figure 3 A part of a high-voltage circuit breaker 1, which has movable contacts 4, unlike Figure 3 The movable contact 4 is arranged in the through opening of the movable slider 7. Detailed Implementation

[0035] exist Figure 1 The image schematically shows a portion of a high-voltage circuit breaker 1 according to the prior art, viewed from one side in a partial cross-sectional view. The high-voltage circuit breaker 1 includes a vacuum switch tube 2, which is fastened to a retainer 6 via a threaded clamp by a releasable clamp. Figure 1 The image shows one side of the vacuum switch tube 2, which has a movable contact 4 made of copper, in particular, and a retainer 6 for the movable contact 4 made of, for example, silver-plated aluminum.

[0036] The retainer 6 is constructed as or includes a clamping device that mechanically secures the cylindrical end of the contact 4 to the retainer 6 via a releasable clamp, enabling electrical conduction between the contact 4 and the retainer 6. In the unsecured state, the retainer is open on its sides or has a gap, such as in... Figure 1 The missing shaded line is shown in the image of the upper half of the retainer 6. For locking, the cylindrical end of the contact 4 is inserted into the opening of the retainer 6. For example, by means of... Figure 1The threaded connection in the opening shown in a circular shape in the upper half of the middle squeezes the retainer 6 at the gap, closing the gap, and causing the contact 4 to be mechanically and electrically clamped by a releasable clamping device.

[0037] The clamp connection described above is releasable and technically expensive, thus associated with high error rates and high costs. In the case of a clamp connection, the form-fit and / or material-fit connection between the retainer 6 and the contact 4 is not planar, because unevenness and cavitation themselves hinder planar form-fit connections under high clamping forces. In particular, the unevenly distributed high clamping forces can lead to material fatigue and / or fracture, especially in the retainer 6, which is associated with low durability and / or reliability of the high-voltage circuit breaker 1.

[0038] exist Figure 2 The high-voltage circuit breaker 1 according to the invention is schematically shown in cross-sectional view. The high-voltage circuit breaker 1 includes a vacuum switch tube 2, which is supported by retainers 5 and 6 via two contacts 3 and 4. The contacts 3 and 4 are directly connected to the corresponding retainers 5 and 6 via shrink-fit connections. These shrink-fit connections are constructed, for example, by shrinking the corresponding retainers 5 and 6 onto their respective associated contacts 3 and 4. The retainers 5 and 6 are, for example, heated and expanded, and the contacts 3 and 4 are inserted, in particular, pushed, into the openings of the retainers 3 and 4. Subsequently, the retainers 5 and 6 are cooled or self-cooled, particularly to room temperature. During cooling, the retainers 5 and 6, and thus their openings, shrink and create a connection with the contacts 3 and 4. This connection is particularly form-fitting and, for example, material-fitting, especially where the retainer material and / or contact material diffuses into the corresponding other materials, for example, at high temperatures during the shrink-fit process. The uniform application of large forces on the connection surface between retainers 5 and 6 and contacts 3 and 4 achieves a mechanically strong, stable, durable, and unbreakable connection, especially in terms of material fit. This connection has good electrical properties, namely, low transition resistance.

[0039] Excellent electrical performance results in low electrical losses on the high-voltage circuit breaker 1, and especially low heat generation under high currents ranging from several amperes to hundreds of amperes. Low heat generation improves the durability and reliability of the high-voltage circuit breaker 1, and reduces the probability of damage or even failure due to high temperatures or high waste heat. The retractable connection is mechanically stable, durable, and, in particular, non-loosening and material-fitted, which is associated with the high reliability of the high-voltage circuit breaker 1.

[0040] exist Figure 3The movable contact 4 of the vacuum switch tube 2 is shown enlarged in the image. The movable contact 4 is connected to a movable slide 7 of a retainer of the movable contact 4. The retainer 6 of the movable contact 4 includes a fixed retainer sleeve 8 or a retainer flange, as shown in... Figure 2 As shown, the retaining flange is fastened, for example, to the housing of the high-voltage circuit breaker 1. For simplicity, the housing is not shown in the figure. A movable slider 7, for example, in the form of a sliding disc and / or a sliding column, is arranged in the fixed retaining sleeve 8. The movable contact 4 is mechanically and electrically fastened directly to the movable slider 7. The movable slider 7 is movably arranged in the fixed retaining sleeve 8 and is electrically connected to the fixed retaining sleeve 8, for example, via a sliding contact. Especially when the high-voltage circuit breaker 1 is switched, the movable contact 4 can be driven by the movable slider 7, which can be moved, for example, by an actuator and / or by elements of a kinematic chain. For simplicity, the elements of the kinematic chain and the actuator are not shown in the figure.

[0041] exist Figure 3 In one embodiment, the end of the movable contact 4 is cylindrically constructed. The movable slider 7 is constructed, for example, in the form of a sliding disk and / or a sliding column with an inner disk, and has, for example, a cylindrical protrusion at the center. A recess is constructed in the protrusion, the recess having the shape of the particularly cylindrical end of the movable contact 4. The recess is constructed slightly smaller than or substantially equal in size to the end of the movable contact 4. When the slider 7 is heated, the slider 7, and therefore the recess, expands, and the end of the movable contact 4 can be inserted into the recess. When the slider 7 is cooled, the recess contracts and the slider 7 is mechanically and securely placed on the contact 4. Alternatively or additionally, the contact 4 can be cooled and inserted into the recess. When heated, the contact 4 expands and forms a fixed mechanical connection with the slider 7. Furthermore, the alternative described above is also called shrinkage, and only the first variation is described in detail, which includes all variations in the combination.

[0042] exist Figure 3 In the middle, the recess in the slider 7 is constructed as a cup shape with a bottom. Figure 4 An alternative embodiment with tubular recesses open on both sides is shown. Here, one end of the contact 4 is inserted and passes through the recess, and one end protrudes from the recess on the side opposite to the vacuum tube 2. The shrinkage method described above is similar to... Figure 3 Examples.

[0043] Similar to Figure 3 and Figure 4 In the example shown, the end of the retaining contact 3 can be connected to the retaining member 5. For simplicity, this is not shown in the figure because the basic principle is the same as... Figure 3 and Figure 4The principle is the same, and the advantages are as described above. For simplicity, combinations of more than two retainers 5, 6 and / or more than one movable retainer 6, as well as combinations for fastening with retainers in the prior art, are also not shown in the figures.

[0044] Contacts 3 and 4 are made of a highly conductive material, such as copper. Retainers 5 and 6, and especially slider 7, are made of, for example, aluminum. The contraction establishes a strong, highly conductive connection between the two different materials. Alternatively, other materials may be used; for example, contacts 3 and 4 and retainers 5 and 6, especially slider 7, may be made of the same material, such as copper or aluminum. Materials may also include and / or steel, or alloys comprising, for example, copper, aluminum, and / or steel.

[0045] The embodiments described above can be combined with each other and / or with existing technologies. Thus, for example, the recesses of retainers 5 and 6 and the ends of contacts 3 and 4 can be cylindrical, truncated conical, and / or rectangular, especially cubic. Combinations of shapes are also possible. For example, one or more vacuum switch tubes 2 can be used in series and / or parallel connections.

[0046] The vacuum switch tube 2 is designed, for example, for switching 35kV and / or up to 145kV. For simplicity, the individual components or parts of the vacuum switch tube 2 are not shown in detail in the figures. The vacuum switch tube 2 is constructed, for example, cylindrically, with conductive contacts, particularly movable contacts and fixed contacts made of, for example, copper. The contacts protrude at their ends from a vacuum-insulated hollow ceramic insulator, wherein the hollow insulator is hermetically sealed on the movable contact side by a metal bellows and on the fixed contact side by a fixed metal disc or a robust metal cap. The vacuum switch tube includes other components or parts, such as shielding electrodes, which are not discussed in detail below.

[0047] The retainers 5, 6, or retainer sleeve 8 are constructed, for example, in a hollow tubular form, with a fastening flange extending outward at one end. Alternatively, the retainer may be an integral part of the housing of the high-voltage circuit breaker 1. The retainer 6 and retainer 5 are constructed, for example, in a hollow tubular form, with the spatially fixed retainer sleeve 8 and a movable slider 7, wherein the vacuum switch tube 2 is adapted to be pushed into the hollow tube and is hermetically sealed, for example, by a seal. The movable slider 7 can be driven by an actuator, for example, during switching, and slides particularly form-fittingly within the fixed retainer sleeve 8 during movement. Thus, the retainer 6 can be movably driven by an actuator, meaning the movable slider 7 can be driven, particularly within the fixed retainer sleeve 8, by an actuator during switching.

[0048] High-voltage circuit breaker 1 may have a housing, the housing being filled with switching gas, especially And / or clean air. The housing is, for example, a hollow insulator that is particularly hermetically sealed, having ribs, especially at the outer circumference, to reduce leakage current; the housing is made of ceramic, silicone, and / or composite materials. Alternatively, the housing is, for example, a hermetically sealed metal can that is electrically grounded. Terminal lugs, for example, are guided outward from the housing by retainers for electrically connecting the high-voltage circuit breaker 1 to the power grid, particularly to generators and / or electrical equipment and / or power lines. The high-voltage circuit breaker 1 also includes, for example, a carrier for arranging the high-voltage circuit breaker 1 on a base. Furthermore, the high-voltage circuit breaker has, for example, an actuator, particularly a spring-loaded actuator, and elements of a kinematic chain, such as a transmission mechanism and at least one drive rod, for actuating movable contacts during switching.

[0049] The high-voltage circuit breaker 1 is equipped with movable and fixed contacts, and may alternatively or additionally include other contacts, and / or may include at least two movable contacts. A mechanically stable and electrically conductive connection between the vacuum switch tube 2, having contacts 3 and 4, particularly made of copper, and the retainers 5 and 6, i.e., the movable slider 7, particularly made of aluminum, is difficult to establish using conventional, especially form-fitting, clamp connections. The use of a direct contraction connection according to the invention between contacts 3 and 4 and retainers 5 and 6, particularly slider 7, achieves a transition or contact between the contacts 3 and 4 of the vacuum switch tube 2 and retainers 5 and 6 or the movable slider 7, which is mechanically stable, especially during rapid actuation, and electrically conductive without significant heat generation. The good thermal conductivity, in particular, allows for effective removal of waste heat from the vacuum switch tube 2. This reduces and / or eliminates the risk of damage and / or destruction of the vacuum switch tube 2.

[0050] List of reference numerals in the attached diagram:

[0051] 1 High-voltage circuit breaker

[0052] 2 Vacuum Switching Tubes

[0053] 3 Fixed Contacts

[0054] 4 movable contact parts

[0055] 5. Retaining element for fixed contact

[0056] 6 Retaining element for movable contact

[0057] 7 movable sliders

[0058] 8. Fixed retaining sleeve

Claims

1. A high-voltage circuit breaker (1) having at least one vacuum switch tube (2) supported by at least one retainer of the high-voltage circuit breaker (1), wherein, The vacuum switch tube (2) includes at least two contacts, which are connected to the at least one retainer. The feature is that at least one contact member is directly connected to the at least one retaining member via a shrink-fit connection.

2. The high-voltage circuit breaker (1) according to claim 1. Its features are, The at least two contacts are respectively connected to the at least one retainer via a shrink connection.

3. The high-voltage circuit breaker (1) according to claim 1. Its features are, The at least two contacts are each connected to a retainer via a shrink-fit connection.

4. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The shrink connection is achieved through heat shrinkage.

5. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The shrink-fit connection is designed to establish a mechanically stable direct electrical contact between the at least one contact and the at least one retainer.

6. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The at least one retainer retracts onto the at least one contact.

7. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The at least one retainer has an opening in the form of a cylinder or a truncated cone inside.

8. The high-voltage circuit breaker (1) according to claim 7. Its features are, The opening is a central opening.

9. The high-voltage circuit breaker (1) according to claim 7. Its features are, The opening of the at least one retainer is configured to pass through, and / or the at least one contact connected to the at least one retainer has at least a portion of the shape of the opening, and / or the at least one contact connected to the at least one retainer is arranged to protrude through the opening.

10. The high-voltage circuit breaker (1) according to claim 7. Its features are, The opening of the at least one retainer is closed on one side, and / or the at least one contact connected to the at least one retainer has at least a portion of the shape of the opening, and / or the at least one contact connected to the at least one retainer is arranged to protrude into the opening.

11. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The contact is a movable contact, and the retainer is a retainer of the movable contact, the retainer comprising a fixed retainer sleeve (8) and a slider (7) movably supported in the retainer sleeve (8), wherein the movably supported slider (7) retracts onto the movable contact.

12. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The at least one contact comprises and / or is made of copper, and / or the at least one retainer comprises and / or is made of aluminum.

13. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The at least one contact is coated with silver, and / or the at least one retainer is coated with silver.

14. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The at least one contact element is electrochemically deposited with silver, and / or the at least one retainer element is electrochemically deposited with silver.

15. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The vacuum switch tube (2) includes at least one fixed contact and at least one movable contact, wherein the fixed contact is connected to a fixed retainer by retraction, and / or wherein the movable contact is connected to a movable slide (7) of the retainer by retraction, the movable slide being movably arranged in a fixed retainer sleeve (8) of the retainer.

16. The high-voltage circuit breaker (1) according to any one of claims 1 to 3. Its features are, The high-voltage circuit breaker (1) is designed to switch voltages ranging from several kilovolts up to 1200 kilovolts.

17. A method for manufacturing a high-voltage circuit breaker (1) according to any one of claims 1 to 16, the high-voltage circuit breaker having at least one vacuum switch tube (2) supported by at least one retainer of the high-voltage circuit breaker (1), wherein, The vacuum switch tube (2) includes at least two contacts connected to at least one retainer, characterized in that the connection between at least one contact and at least one retainer is performed directly by means of good electrical conductivity and mechanical stability.

18. The method according to claim 17, Its features are, The shrinkage is achieved by thermal cooling of the heated retainer on the contact and / or thermal cooling of the heated contact on the retainer.

19. The method according to claim 17, Its features are, The shrinkage is achieved by thermal cooling of the heated retainer (5, 6) on the contact (3, 4) at room temperature and / or thermal cooling of the heated contact (3, 4) on the retainer (5, 6) at room temperature.

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