High-voltage circuit breaker using shrink-fit connection, and method for manufacturing the same

Abstract

The present invention relates to a high-voltage circuit breaker (1) having at least one vacuum interrupt valve (2) supported by at least one holder (5, 6) of the high-voltage circuit breaker (1), and a method for manufacturing the high-voltage circuit breaker (1). The vacuum interrupt valve (2) has at least two contacts (3, 4), which are coupled to the at least one holder (5, 6). At least one contact (3, 4) is directly coupled to the at least one holder (5, 6) by shrink fitting.

Description

Technical Field

[0001] The present invention relates to a high-voltage circuit breaker having at least one vacuum interrupter supported by at least one holder of the high-voltage circuit breaker, and a method for manufacturing the high-voltage circuit breaker. In this case, the vacuum interrupter has at least two contacts, and these contacts are coupled to at least one holder.

[0002] The high-voltage circuit breaker is configured to open and close a voltage in a voltage range of 1200 kV or less and a current range of several thousand amperes or less. The high-voltage circuit breaker includes, for example, a housing having at least one opening and closing contact on a support. The housing is, for example, an insulator made of ceramic, silicone, and / or composite material, and the insulator is, for example, a cylindrical hollow body and is provided with a plurality of umbrella-shaped ribs on the outer periphery in particular to extend the creeping current. In contrast to the post-type high-voltage circuit breaker, in the tank-type high-voltage circuit breaker, the housing is grounded, and the housing is made of, for example, a hollow cylindrical metal tank, and at least one opening and closing contact is disposed inside thereof.

[0003] The opening and closing contact includes at least two contacts, for example, one fixed contact and one movable contact, and these contacts are made of a conductive material such as steel, aluminum, and / or copper, for example. Instead of or in addition to this, one opening and closing contact can include, for example, at least two movable contacts. In this case, the embodiment having two movable contacts is similar to one fixed contact and one movable contact in the present invention and will not be described further hereinafter for the sake of simplicity. These contacts of the opening and closing contact are disposed in the high-voltage circuit breaker or supported by a plurality of holders, and are particularly supported movably or fixedly, and are particularly hermetically sealed by the housing.

[0004] The housing is filled with an insulating gas or a breaking gas, in particular SF6 and / or clean air. These switching contacts include, for example, rated current contacts and / or arc contacts, and are electrically insulated from specific devices and peripheries of a high-voltage circuit breaker such as a drive device by the breaking gas. Breaking gases such as SF6 are harmful to the climate and / or may contain toxic components. In order to prevent the breaking gas from leaking from the high-voltage circuit breaker, an airtight and permanent seal of the housing is required, which is complex, expensive, and costly. The end-of-life disposal of high-voltage circuit breakers, especially environmentally friendly disposal of the breaking gas, is also complex and costly. An environmentally friendly alternative is to use a vacuum valve in the above-described typical housing.

[0005] By using a typical housing as described above, it is possible to easily and cost-effectively replace high-voltage circuit breakers in a power system, and in particular, to easily and cost-effectively manufacture a large number of high-voltage circuit breakers. In order to replace an environmentally harmful breaking gas such as SF6 with an environmentally friendly breaking gas, for example, clean air, that is, dried and purified air, it is necessary to replace the rated current system and the arc discharge contact system with a vacuum interrupter valve in order to maintain the insulation distance required in a typical housing.

[0006] The vacuum interrupter valve is mechanically stably arranged and connected between at least two external electrical connections inside the housing so as to conduct electricity. In this case, this electrical connection is formed, for example, in the form of a high-voltage cable, a connection terminal for connection of a generator and / or a power user. The structure of the vacuum interrupter valve for a high-voltage circuit breaker is known, for example, from Patent Document 1. The vacuum interrupter valve includes a circular and linear cylindrical housing, and the inside of this cylinder is evacuated. This housing is made of ceramic or a plurality of ceramic parts, and is composed of, for example, two identical half parts of a linear cylinder, and these two half parts are combined with a plurality of transition parts at the central part of the housing via one metal cylinder or one metal part. These transition parts are formed as shield electrodes or shields inside the housing.

[0007] This vacuum circuit breaker has at least one electrical contact for opening and closing, and this electrical contact has one fixed contact and one movable contact. These contacts are configured in a dish shape within the vacuum circuit breaker and are vacuum-sealed. These contacts are guided outward in the shape of bolts, and each is connected to an external electrical connection portion, for example, in the shape of a connection terminal of a high-voltage circuit breaker. The movable contact is hermetically guided and supported within the vacuum circuit breaker via a bellows so as to be movable.

[0008] When closing, the movable contact moves toward the fixed contact until mechanical and electrical contact is established between the two contacts. When opening, the movable contact is separated from the fixed contact until the electrical contact between the two contacts is interrupted and a sufficient distance is taken to avoid electrical flashover at the applied voltage. At high voltages, it is necessary that the distance between the two contacts be large. The vacuum circuit breaker is made in a long shape so as to ensure a sufficient distance inside. The ceramic or a plurality of ceramic parts of the linear cylindrical half part of the housing of the vacuum circuit breaker are composed of, for example, several parts, and these parts are joined to a plurality of transition parts via a plurality of metal parts. These transition parts are each fabricated as a shield electrode or shield within the housing. The joining of the ceramic parts of the housing via metal parts made of, for example, copper and / or steel is performed, for example, by brazing.

[0009] The connection of the plurality of contacts of the vacuum interrupter to a plurality of holders, in particular for supporting these contacts, and thus to the drive device of the high-voltage circuit breaker and / or to a plurality of fixed conductive parts, is effected by a clamp connection. These holders are, for example, made of aluminum and / or steel. Aluminum has a low mass and can transmit the acceleration of the drive device to the moving contact with low energy consumption, and furthermore, the fixed contact can be easily and inexpensively fixed in the high-voltage circuit breaker with a lightweight holder. The contacts of the vacuum interrupter are made of, for example, copper for high current-carrying performance. The connection between these contacts and their respective holders is effected in particular by a clamp connection between aluminum and copper parts. The fitting-type clamp connection includes two electrical contact points, which cause excessive heating and electrical losses in the circuit breaker. At very high currents reaching several thousand amperes, very large electrical losses can occur, and the high temperature in the circuit breaker can lead to damage and / or destruction. For example, a clamp connection crimped by screwing is detachable, technically complex, and results in a high failure rate and high cost.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0011] 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 such a high-voltage circuit breaker, particularly the above-mentioned high-voltage circuit breaker. In particular, this object is to provide a high-voltage circuit breaker in which at least one vacuum interrupter is mechanically stably arranged and supported, has low cost, a low failure rate, low electrical losses in the closed state, and particularly low heat generation at high currents.

Means for Solving the Problems

[0012] This problem is solved by a high-voltage circuit breaker having the features of claim 1 and / or by a manufacturing method according to claim 14 of a high-voltage circuit breaker, in particular the aforementioned high-voltage circuit breaker. Advantageous forms of the high-voltage circuit breaker according to the invention and / or advantageous forms of the manufacturing method of the high-voltage circuit breaker according to the invention, in particular the aforementioned high-voltage circuit breaker, are described in the dependent claims. The subject matter of the main claims can be combined with each other and with the features of the dependent claims, and the features of the dependent claims can be combined with each other.

[0013] The high-voltage circuit breaker according to the invention comprises at least one vacuum interrupter valve, which is supported by at least one holder of the high-voltage circuit breaker. In this case, this vacuum interrupter valve has at least two contacts, and these contacts are coupled to at least one holder. At least one contact is directly coupled to at least one holder by a shrink-fit connection.

[0014] The shrink-fit connection enables a mechanically stable and good conductive connection between at least one contact and at least one holder, and this connection can be carried out permanently, simply and at low cost. Since the contact resistance through the interface surface of the contact sleeve between at least one contact and at least one holder is small, in particular, the heat generation at the bonding surface and / or the contact, as well as the holder and their interface surfaces, is reduced, and in particular, it is possible to pass a current in the range up to several hundred amperes.

[0015] Clamping connections via screwed joints, as commonly done in the prior art, have two or more joint surfaces. The contact resistance at these joint surfaces is large, resulting in high output losses and lower mechanical stability compared to connections that shrink one element onto another. Depending on the temperature of the heated element or component before shrinkage, a direct, inseparable joint is formed by the joint surface and the diffusion process beyond it, with good conductivity and low resistance. The good thermal conductivity of the shrink-fit joint enables particularly good dissipation of excess heat from the vacuum circuit breaker, especially during opening and closing. This reduces the probability of the high-voltage circuit breaker being damaged or destroyed and improves its durability.

[0016] At least two of these contacts can be joined to at least one holder, in particular, each to one holder, each via a shrink-fit joint. This results in a good conductive connection in the closed state of the high-voltage circuit breaker, particularly via both contacts and their holders. This shrink-fit joint provides high mechanical stability and the above-described good electrical properties, which have the advantages mentioned above.

[0017] This shrink-fit joint can be produced by thermal shrinkage. Thermal shrinkage can be carried out simply and at low cost by heating at least one element or component and then cooling it. In particular, a cold component, for example at room temperature, can be inserted into the opening of a heated component, and when the heated component cools, the dimensions of the heated component, and thus the opening, shrink. In this way, a simple, inexpensive, mechanically strong, and conductive connection can be achieved between the cooled component and, in particular, a component at room temperature. Similarly, it is also effective to cool one component and then heat the cooled component inserted into the opening of a component at room temperature, for example, and a combination of cooling one component and heating the other component is also effective. By this definition, the connection thus implemented will also be described as a shrink-fit joint in the following.

[0018] This shrink-fit connection can be formed to create a mechanically stable direct electrical contact between at least one contact and at least one holder. The direct contact provides particularly high mechanical stability and particularly good electrical properties. Thus, in the closed state of the high-voltage circuit breaker, a good conductive connection via the high-voltage circuit breaker, in particular via both contacts and their holders, is obtained, which has the advantages described above.

[0019] At least one holder can be shrink-fitted onto at least one contact. This is preferably the case when the contact is at least partially, for example in terms of the dimensions of its end, for example the diameter, smaller than at least one holder, especially when the dimensions of the opening inside the holder are approximately the same as that part of the contact.

[0020] This at least one holder can have one opening, especially a cylindrical or frustoconical opening, especially a central opening, inside it. This opening of the at least one holder can be a through-opening. The at least one contact connected to this at least one holder is at least partially shaped like this opening. The at least one contact connected to this at least one holder can be arranged to penetrate this opening. This can be technically easily implemented and it is possible to use, for example, long contacts with particularly large manufacturing tolerances.

[0021] Alternatively or in addition to this, one side of the opening of this at least one holder can be closed. The shape of the at least one contact that can be connected to this at least one holder can be at least partially the same as the shape of this opening. The at least one contact that can be connected to this at least one holder can be arranged to protrude into this opening. This enables a mechanically stable configuration with an additional contact area for good electrical and / or thermal contact, which is present on this closed surface.

[0022] One contact can be a movable contact, and one holder can be a holder for the movable contact. This holder includes one fixed holder sleeve and further includes one slide piece movably supported within this holder sleeve. In this case, this movably supported slide piece is shrink - fitted and joined onto the movable contact. Due to this mechanically stable connection between the movable contact and the slide piece, reliable opening and closing and high - speed movement are possible without the connection being broken. Furthermore, good electrical and / or thermal conduction between the slide piece and the holder sleeve is possible, especially via, for example, spring contacts and / or electrical sliding contacts, especially from the contact over the slide piece and the holder sleeve.

[0023] At least one of the contacts can contain copper and / or can be made of copper. The electrical conductivity of copper is very high, so the heat generation during high - current operation is small. The thermal conductivity of copper is large and it is mechanically stable. At least one of the holders can contain aluminum and / or can be made of aluminum. Aluminum is inexpensive, lightweight, and has high electrical conductivity, high thermal conductivity, and high mechanical strength, although these conductivities are lower than those of copper. Especially for the holder of the movable contact, since the weight is small, a high - speed opening and closing speed is possible with low energy consumption, especially with fewer slide pieces of the holder.

[0024] At least one contact can be coated with silver, especially electrochemically deposited. At least one holder can be coated with silver, especially electrochemically deposited. These silver coatings enable good electrical and / or thermal contact and can cause the integration of the contact and the holder, especially during heat treatment, when different materials are used, especially when both materials are coated with silver in particular. This results in a connection with good electrical, thermal, and mechanical properties, which has the advantages described above.

[0025] This vacuum circuit breaker includes at least one fixed contact and at least one movable contact. The fixed contact can be coupled to a fixed holder by shrink fitting, and / or the movable contact can be coupled to a movable slide piece of a holder, and this movable slide piece can be disposed within a fixed holder sleeve of the holder by shrink fitting. This enables a mechanically stable high-voltage circuit breaker with contacts that can be easily moved with low energy consumption during opening and closing. This high-voltage circuit breaker has good electrical characteristics, particularly a high electrical conductivity and low resistance passing through this high-voltage circuit breaker in the closed state.

[0026] This high-voltage circuit breaker can be configured to open and close voltages in the range from several kilovolts to up to 1200 kilovolts. The above-described advantages occur particularly advantageously at high currents and / or high voltages.

[0027] A method for manufacturing a high-voltage circuit breaker, particularly comprising at least one vacuum circuit breaker supported by at least one holder of the high-voltage circuit breaker as described above, the vacuum circuit breaker having at least two contacts, and the method for manufacturing a high-voltage circuit breaker configured such that these contacts are coupled to at least one holder includes that the coupling of at least one contact and at least one holder is performed directly by shrink fitting, particularly in a manner that is well-conductive and mechanically stable.

[0028] This shrink fitting can be performed, in particular, by the thermal cooling of a heated holder onto the contact, particularly onto a room-temperature contact, and / or by the thermal cooling of a heated contact onto the holder, particularly onto a room-temperature holder.

[0029] The advantages of the method for manufacturing a high-voltage circuit breaker, particularly the method for manufacturing a high-voltage circuit breaker according to claim 14 of the above-described high-voltage circuit breaker, are the same as the advantages of the high-voltage circuit breaker according to claim 1, and vice versa.

[0030] The following will be described in more detail with reference to FIGS. 1 to 4, which schematically show a high-voltage circuit breaker according to the prior art and an embodiment according to the present invention.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0032] FIG. 1 is a partial cross-sectional schematic view of a part of a high-voltage circuit breaker 1 according to the prior art as viewed from the side. This high-voltage circuit breaker 1 includes one vacuum interrupter valve 2, which is fixed to a holder 6 by a repeatedly detachable clamp via a screw clamp. FIG. 1 shows one side of the vacuum interrupter valve 2 particularly including a movable contact 4 made of copper and a holder 6 for this movable contact 4 made of aluminum, for example, silver-plated.

[0033] This holder 6 is formed in the form of a clamping device or includes a clamping device that mechanically fixes the cylindrical end of the contact 4 to the holder 6 by repeatedly detachable clamping and enables electrical conduction between the contact 4 and the holder 6. In the unclamped state, as shown in the upper half of the holder 6 without hatching in FIG. 1, the outer skin surface of this holder is open or a gap is formed. To clamp, for example, the cylindrical end of the contact 4 is inserted into the opening of the holder 6. By, for example, screwing the hole circularly shown in the upper half of FIG. 1 to press the gap of the holder 6, the gap is closed, and the contact 4 is mechanically stably and conductively clamped by a repeatedly detachable clamping device.

[0034] The above-mentioned clamping connection is detachable and technically complex, which therefore leads to a high failure rate and high costs. The fitting connection and / or material connection between the holder 6 and the contact 4 is not formed in a planar manner in the case of the clamping connection. This is because even if the clamping force is strong, the surface unevenness and air-containing parts prevent the planar fitting connection. A strong clamping force, especially a non-uniformly distributed clamping force, particularly leads to material fatigue and / or damage of the holder 6, which reduces the durability and / or reliability of the high-voltage circuit breaker 1.

[0035] Figure 2 schematically shows a cross-section of the high-voltage circuit breaker 1 according to the present invention. This high-voltage circuit breaker 1 includes a single vacuum interrupter 2, which is supported by holders 5, 6 via its two contacts 3, 4. The contacts 3, 4 are directly connected to their respective holders 5, 6 via shrink-fit connections. The shrink-fit is formed, for example, by shrinking the respective holders 5, 6 onto the contacts 3, 4 assigned to them. The holders 5, 6 are heated, for example, and expand, and the contacts 3, 4 are inserted into the openings of the holders 3, 4 and particularly pushed in. Thereafter, the holders 5, 6 are cooled particularly to room temperature or cooled down. When cooled down, the holders 5, 6, i.e., the openings of the holders 5, 6, contract and a connection with the contacts 3, 4 occurs. This connection is formed particularly in a fitting connection and, for example, due to the high temperature during the shrinkage process, particularly when the holder material and / or the contact material diffuses into the corresponding other material, for example, in a material connection. Due to the strong and uniform force acting between the holders 5, 6 and the contacts 3, 4 via the bonding surface, a mechanically strong, stable, permanent, inseparable, particularly material-bonded connection becomes possible, and this connection has good electrical characteristics, i.e., the contact resistance via the connection part is small.

[0036] Due to this good electrical characteristic, the power loss passing through this high-voltage circuit breaker 1 is reduced, and the heat generation particularly during high currents in the range from several amperes to several hundred amperes is reduced. The low heat generation enhances the durability and reliability of the high-voltage circuit breaker 1 and reduces the probability of damage or destruction of the high-voltage circuit breaker 1 due to high temperature or high waste heat. The shrink-fit connection is mechanically stable, permanent, particularly inseparable, and furthermore, material-bonded, whereby the high reliability of the high-voltage circuit breaker 1 is obtained.

[0037] Figure 3 is an enlarged view of the moving contact 4 of the vacuum circuit breaker 2, and this moving contact is coupled to the movable slide piece 7 of its holder. The holder 6 of the moving contact 4 includes a fixed holder sleeve 8 or a holder flange as shown in Figure 2, and this holder sleeve is fixed to, for example, the housing of the high-voltage circuit breaker 1. For the sake of simplicity, the housing is not shown in the drawing. Inside the fixed holder sleeve 8, a slide piece 7 in the form of, for example, a slide disk and / or a slide cylinder is arranged. The moving contact 4 is directly fixed to this slide piece 7 so as to be mechanically fixed and electrically conductive. This movable slide piece 7 is movably arranged inside the fixed holder sleeve 8 and is conductively coupled to the fixed holder sleeve 8 via, for example, sliding contacts. The moving contact 4 can be driven, in particular, when the high-voltage circuit breaker 1 is opened and closed, by the movable slide piece 7 that is movable via, for example, a drive device and / or via a plurality of elements of the motion mechanism. The elements of the motion mechanism and the drive device are not shown in the drawing for the sake of simplicity.

[0038] In the embodiment of Figure 3, one end of the moving contact 4 is formed in a cylindrical shape. The movable slide piece 7 is formed in the shape of a slide cylinder having a slide disk and / or an inner disk, and, for example, particularly has a cylindrical protrusion in the central part. A recess is formed in this protrusion, and the shape of this recess is the shape of the particularly cylindrical end of the moving contact 4. The size of this recess is slightly smaller than or almost the same as that of the moving contact 4. When the slide piece 7 is heated, this slide piece 7, and thus this recess, expands, and the end of the moving contact 4 can be inserted into this recess. When the slide piece 7 cools, the recess contracts, and the slide piece 7 firmly adheres mechanically to the contact 4. Instead of or in addition to this, the contact 4 can be cooled and inserted into the recess. This contact 4 expands when heated, and a strong mechanical bond with the slide piece 7 is formed. Hereinafter, the above-mentioned alternatives are also called shrink fitting, but only the first alternative will be described in detail. In this case, all alternatives are included in the combination.

[0039] In FIG. 3, the recess of the slide piece 7 is formed in a bottomed pot shape. FIG. 4 shows an alternative embodiment, which has a pipe-shaped recess with both sides open. In this case, the end of the contact 4 penetrates this recess, and one end protrudes from this recess to the side opposite to the vacuum interrupter valve 2. The shrink fitting method described above is the same as the example in FIG. 3.

[0040] Similar to the examples shown in FIGS. 3 and 4, the end of the fixed contact 3 can be coupled to the fixed holder 5. This is not shown in the drawings for the sake of simplicity, because the basic principle is the same as that of FIGS. 3 and 4, and the advantages are as described above. Combinations of three or more holders 5, 6, and / or combinations of two or more movable holders 6, as well as combinations with fixing devices of a plurality of holders according to the prior art, are not shown in the drawings for the sake of simplicity.

[0041] The contacts 3, 4 are made of a material with good conductivity, such as copper. The holders 5, 6, especially the movable holder 7, are made of aluminum, for example. By shrink fitting, a fixed and good conductive connection is formed between two different materials. As an alternative, other materials can be used. For example, the contacts 3, 4, and the holders 5, 6, especially the slide piece 7, can be made of the same material, such as copper or aluminum. These materials can also include steel and / or be made of steel, or can include, for example, copper alloys, aluminum alloys and / or steel alloys.

[0042] The above-described multiple embodiments can be combined with each other and / or can be combined with the prior art. That is, the recesses of the holders 5, 6 and / or the ends of the contacts 3, 4 can be cylindrical, frustum-shaped and / or rectangular, especially cubic. Combinations of these shapes are also possible. One or, for example, a plurality of vacuum interrupter valves 2 connected in series and / or in parallel can be used.

[0043] One vacuum circuit breaker 2 is configured for opening and closing up to 35 kV and / or 145 kV. For the sake of simplicity, the individual elements or components of this vacuum circuit breaker 2 are not shown in detail in the drawings. This vacuum circuit breaker 2 is formed, for example, in a cylindrical shape and includes a plurality of conductive contacts, in particular, one movable contact 4 and one fixed contact 3, for example made of copper, and the ends of these contacts protrude from a ceramic, evacuated hollow insulator. In this case, the movable contact side of this hollow insulator is hermetically sealed by a metal bellows, and the fixed contact side is hermetically sealed by a fixed metal disk or a fixed metal cover. The vacuum circuit breaker includes other elements or components, such as shield electrodes, for example, but these will not be described in detail below.

[0044] The holders 5, 6 to holder sleeve 8 are formed, for example, in a hollow pipe shape and have fixed flanges guided outward at their ends. As an alternative, these holders can be an integrated part of the housing of the high-voltage circuit breaker 1. The holders 6, which include a spatially fixed holder sleeve 8 and a movable slide piece 7, and the holder 5 are formed, for example, in a hollow pipe shape, and the vacuum circuit breaker 2 is fitted and inserted into this hollow pipe and is hermetically sealed, for example, by a seal.

[0045] This high-voltage circuit breaker 1 can have a housing filled with interrupting gas, in particular SF6 and / or clean air, which is not shown in the drawings for the sake of simplicity. This housing can be, for example, in particular a hermetically sealed hollow insulator, which is provided with a plurality of ribs made of ceramic, silicone, and / or composite material along its outer peripheral portion to reduce the creeping current. Alternatively, this housing can be, for example, a hermetically sealed metal tank, which is electrically grounded. From these holders, connection terminals for electrically connecting this high-voltage circuit breaker 1 to the power system, in particular to the generator and / or the consumer and / or the power cable, are guided outward from the housing. This high-voltage circuit breaker 1 further comprises, in particular, a support for disposing itself on a foundation. This high-voltage circuit breaker 1 further has a drive device, in particular a spring-type drive device, and elements of a motion mechanism for driving the movable contact during opening and closing, for example, gears and at least one drive rod.

[0046] This high-voltage circuit breaker 1 is composed of one movable contact and one fixed contact. Instead of or in addition to this, it can include a further plurality of contacts and / or at least two movable contacts. A mechanically stable and good-conductivity connection between the vacuum interruption valve 2 provided with contacts 3, 4 made of copper in particular, and the holders 5 and 6 made of aluminum in particular, i.e., the movable slide piece 7, is difficult to achieve with a typical, in particular, fitting-type clamp connection. By using a direct shrink-fit connection according to the present invention between the contacts 3, 4 and the holders 5, 6, in particular the slide piece 7, a transition or contact that is mechanically stable, has good conductivity, and does not generate large heat generation during high-speed driving operations in particular is made possible between the contacts 3, 4 of the vacuum interruption valve 2 and the holders 5, 6, i.e., in particular the movable slide piece 7. Due to the good thermal conductivity, in particular, good discharge of waste heat from the vacuum interruption valve 2 is made possible. Thereby, the risk of damage and / or destruction of the vacuum interruption valve 2 is reduced and / or eliminated.

Description of Reference Numerals

[0047] 1 High-voltage circuit breaker 2 Vacuum circuit breaker 3 Fixed contact 4 Moving contact 5 Holder of fixed contact 6 Holder of moving contact 7 Movable slide piece 8 Fixed holder sleeve

Claims

1. A high-voltage circuit breaker (1) comprising at least one vacuum interrupter (2), wherein the at least one vacuum interrupter (2) is supported by at least one holder (5, 6) of the high-voltage circuit breaker (1). The at least one vacuum interrupter (2) comprises at least two contacts (3, 4), and at least one of the at least two contacts (hereinafter referred to as "the at least one contact (3, 4)") is directly coupled to the at least one holder (5, 6) by a shrink-fit connection. A high-voltage circuit breaker (1) characterized by this.

2. The high-voltage circuit breaker (1) according to claim 1, characterized in that the at least two contacts (3, 4) are coupled to the at least one holder (5, 6) via a shrink-fit connection.

3. The high-voltage circuit breaker (1) according to claim 1 or 2, characterized in that the shrink-fit connection is caused by thermal contraction.

4. The high-voltage circuit breaker (1) according to any one of claims 1 to 3, characterized in that the shrink-fit connection is formed so as to generate a mechanically stable direct electrical contact between the at least one contact (3, 4) and the at least one holder (5, 6).

5. The high-voltage circuit breaker (1) according to any one of claims 1 to 4, characterized in that the at least one holder (5, 6) is shrink-fitted onto the at least one contact (3, 4).

6. The high-voltage circuit breaker (1) according to any one of claims 1 to 5, characterized in that the at least one holder (5, 6) has an opening inside.

7. The opening of the at least one holder (5, 6) is a through-opening, and / or, The at least one contact (3, 4) coupled to the at least one holder (5, 6) is at least partially shaped like the opening, and / or, the at least one contact (3, 4) coupled to the at least one holder (5, 6) is disposed through the opening, High-voltage circuit breaker (1) according to claim 6, characterized in that.

8. One side of the opening of the at least one holder (5, 6) is closed, and / or, the shape of the at least one contact (3, 4) coupled to the at least one holder (5, 6) is at least partially the shape of the opening, and / or, the at least one contact (3, 4) coupled to the at least one holder (5, 6) is disposed so as to protrude into the opening, High-voltage circuit breaker (1) according to claim 6, characterized in that.

9. One contact (4) is a movable contact, one holder (6) is a holder of the movable contact (4), this holder includes one fixed holder sleeve (8), and further includes one slide piece (7) movably supported within the holder sleeve (8), High-voltage circuit breaker (1) according to any one of claims 1 to 8, characterized in that the one slidable piece (7) movably supported is shrink-fitted on the movable contact (4).

10. The at least one contact (3, 4) contains copper and / or is made of copper, and / or the at least one holder (5, 6) contains aluminum and / or is made of aluminum, High-voltage circuit breaker (1) according to any one of claims 1 to 9, characterized in that.

11. at least one of the contacts (3, 4) is coated with silver, and / or, at least one of the holders (5, 6) is coated with silver, The high-voltage circuit breaker (1) according to any one of claims 1 to 10, characterized in that.

12. The vacuum interruption valve (2) includes at least one fixed contact (3) and at least one movable contact (4), the fixed contact (3) is coupled to one fixed holder (5) by shrink fitting, and / or, the movable contact (4) is coupled to the movable slide piece (7) of the holder (6) by shrink fitting, and the movable slide piece (7) is disposed within the fixed holder sleeve (8) of the holder (6), The high-voltage circuit breaker (1) according to any one of claims 1 to 11, characterized in that.

13. The high-voltage circuit breaker (1) according to any one of claims 1 to 12, characterized in that the high-voltage circuit breaker (1) is configured to open and close voltages in the range from several kilovolts to 1200 kilovolts.

14. A method for manufacturing the high-voltage circuit breaker (1) according to any one of claims 1 to 13, wherein the at least one vacuum interruption valve (2) is supported by the at least one holder (5, 6) of the high-voltage circuit breaker (1). In the method for manufacturing the high-voltage circuit breaker (1), the at least one vacuum interruption valve (2) includes at least two contacts (3, 4), and the coupling between at least one of the at least two contacts (3, 4) and the at least one holder (5, 6) is directly performed by shrink fitting. A method characterized by that.

15. The shrink fitting is, Performed by thermal cooling of the heated holders (5, 6) on the contacts (3, 4), and / or, Performed by thermal cooling of the heated contacts (3, 4) on the holders (5, 6), The method according to claim 14, characterized in that.

Images