Bellows protector for a vacuum interrupter
Patent Information
- Application Number
- EP2023776859
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-09-21
- Filing Date
- 2023-09-07
- Publication Date
- 2025-06-18
AI Technical Summary
Vacuum interrupters with external bellows are prone to damage during transport, handling, and operation due to misalignment or axial displacement of the moving contact rod, leading to potential damage and inefficiency in switchgear and tap changers.
A bellows protection system with a tapered design that guides the moving contact rod and includes a holding mechanism to prevent tilting, featuring a cylindrical geometry and optional locking means, which is attached to the vacuum interrupter using insulators and shielding elements to ensure alignment and stability.
The solution effectively prevents damage to the bellows and the vacuum interrupter by maintaining the moving contact rod's alignment, providing protection during transport and operation, and enhancing mechanical stability and electrical insulation.
Smart Images
Figure 1.1
Abstract
Description
[0001] Description
[0002] Bellows protection for a vacuum interrupter
[0003] The invention relates to a bellows protector for a vacuum interrupter, a vacuum interrupter with such a bellows protector, a switchgear assembly with a vacuum interrupter with such a bellows protector, a tap changer with a vacuum interrupter with such a bellows protector and a manufacturing method for a vacuum interrupter with such a bellows protector.
[0004] Vacuum interrupters with an external bellows are known from the state of the art. With such vacuum interrupters with an external bellows, there is a risk that the bellows and the vacuum interrupter may be damaged during transport, handling, and assembly, as well as during switching operations in the installed state, for example, in a switchgear or a tap changer. In the installed state, damage to the bellows can occur, for example, due to misalignment or axial offset of the moving contact rod relative to the vacuum interrupter axis.
[0005] The object of the invention is therefore to eliminate the disadvantages of the prior art.
[0006] The problem is solved by the independent claim 1 and the claims dependent thereon.
[0007] One aspect relates to a bellows protector for a vacuum interrupter with an external bellows for low, medium or high voltages, wherein the bellows protector has at least: a first region which is tapered and is further designed to receive a moving contact rod in such a way that the moving contact rod can be guided from an inner side of the bellows protector out of the bellows protector to a second side outside the bellows protector, wherein the tapered first region of the bellows protector is designed to bear against the moving contact rod in such a way that the moving contact rod is guided through the bellows protector, a second region which adjoins the first region, wherein the second region is enlarged compared to the first region in such a way that the bellows to be protected can be received in the second region, and a holding region, wherein the holding region is designed to fasten the bellows protector on or to the vacuum interrupter in such a way,that the bellows protection forms a guide for the moving contact rod.,
[0008] For the purposes of this disclosure, guidance is understood to mean guiding the moving contact in a way that prevents the moving contact rod from exceeding a predetermined angle with respect to the longitudinal axis of the vacuum interrupter, and thus prevents damage to the bellows due to tilting of the moving contact rod. This is achieved in particular in that the tapered region of the first region bears against at least one section which, when used according to the invention, bears against the moving contact rod and runs largely parallel to the longitudinal axis of the vacuum interrupter. The moving contact is therefore arranged so as to be movable in the direction of the longitudinal axis by the bellows and is guided by the guide during a movement along the longitudinal axis.
[0009] Accommodating or receivable here means in particular that the bellows of the moving contact is arranged in an inner area of the bellows protection, i.e. the inner side.
[0010] Attaching the bellows protector to the vacuum interrupter means that the bellows protector is not mounted so that it can move with the moving contact relative to the stationary parts of the vacuum interrupter, but rather the moving contact moves relative to the bellows protector. A possible rotation of the bellows protector around the vacuum interrupter can optionally be prevented with an additional locking device, whereby the additional locking device interacts with an additional locking device counterpart on the vacuum interrupter.
[0011] The bellows protection optionally has a cylindrical geometry on the inside, which is adapted to the external geometry of a vacuum interrupter.
[0012] Further optionally, the outer geometry of the bellows protection also has a cylindrical geometry.
[0013] It is preferred that the bellows protection has a guide region in the first region, which is designed as a sliding bearing for the moving contact.
[0014] It is particularly preferred that the guide area be designed such that only the moving contact rod can pass through the guide area, but not a fixed contact of the vacuum interrupter. This is achieved in particular by a different shape of the moving contact and the fixed contact.
[0015] It is also preferred that the first region have further slits and / or the second region and / or third region have slits that allow gas circulation between the inner side of the bellows protector and the second side outside the bellows protector. Slits in the second region and third region allow not only gas circulation but also targeted flexibility of the second region and the third region, which facilitates installation on a vacuum interrupter while still ensuring a sufficiently tight fit of the bellows protector on the vacuum interrupter.
[0016] It is also preferred that the bellows protector has ribs or webs on the inner side of the bellows protector and / or the second side of the bellows protector, perpendicular and / or parallel to the longitudinal axis of the vacuum interrupter. These ribs or webs serve to increase the mechanical stability of the bellows protector and / or to extend electrical creepage distances.
[0017] It is also preferred that the bellows protector is formed in one piece and the holding area is designed to extend from the moving contact side over a first insulator of a vacuum interrupter and to engage on the side of the first insulator opposite the moving contact with an engagement on the first insulator or tube components adjoining the first insulator such that the bellows protector is to be fastened to the vacuum interrupter. Tube components adjoining the first insulator are in particular the intermediate element and / or the further insulator and / or the shielding element and / or the fixed contact flange and / or the fixed contact rod. In particular, it is preferred that the engagement either
[0018] - on the side of the first insulator opposite the moving contact, engages with an indentation on the first insulator and fastens the bellows protection, or
[0019] - on the side of the first insulator opposite the moving contact, engages with an indentation on the fixed contact flange and thus fastens the bellows protection.
[0020] In other words, the intervention engages one of the tube components on the side of the first insulator opposite the moving contact, also referred to as behind the first insulator, in such a way that the bellows protection is attached to the vacuum interrupter.
[0021] It is also preferred that the bellows protection is designed in several parts, in particular in two parts, wherein the bellows protection has at least a first bellows protection element and a further bellows protection element, wherein the first bellows protection element and the further bellows protection element are connected or connectable to one another.
[0022] It is advantageous if the first bellows protection element and the further bellows protection element can be connected to one another in that the first bellows protection element is brought together from the side with the moving contact and the further bellows protection element is brought together from the side opposite the moving contact, i.e. can be brought together. Particularly preferably, the further bellows protection element also has a tapered first region through which a fixed contact rod can be guided. Alternatively, instead of the fixed contact rod, a further moving contact rod can also be guided through the tapered region of the further bellows protection element, thereby making the bellows protection usable for a vacuum interrupter with two moving contacts.
[0023] It is also preferred that the connection between the first bellows protection element and the further bellows protection element be established by a positive or non-positive connection. In particular, the positive connection is formed by a locking connection with one or more notches, i.e., engagement means, and one or more locking recesses. Alternatively, a screw connection or another type of connection may also be provided.
[0024] It is further preferred that the bellows protection be formed from an electrically insulating material and be designed to reduce or prevent electrical discharges or partial discharges. In particular, discharges or partial discharges between other components of a switchgear assembly and metallic parts of the vacuum interrupter are reduced or prevented by appropriate bellows protection.
[0025] The bellows protection is preferably made of a plastic and is preferably manufactured using an injection molding process.
[0026] A further aspect relates to a vacuum interrupter, wherein the vacuum interrupter has a bellows protector according to one of the above embodiments. It is particularly advantageous that the bellows protector, in addition to protecting the bellows and guiding the moving contact rod, also simultaneously provides transport protection, which additionally protects the vacuum interrupter as a whole. The guidance of the moving contact rod serves to prevent any misalignment or axial offset of the moving contact rod relative to the longitudinal axis of the vacuum interrupter.
[0027] It is further preferred that the fixed contact of the vacuum interrupter has a first locking recess for receiving a further engagement. This first locking recess thus serves to fasten a further bellows protection element in a multi-part, in particular a two-part, bellows protection by means of an engagement on the vacuum interrupter. The first locking recess preferably has an inverse structure for further engagement.
[0028] It is particularly preferred that it is a vacuum interrupter for a low-voltage, medium-voltage or high-voltage switchgear.
[0029] It is also particularly preferred that it is a vacuum interrupter for a tap changer, in particular an on-load tap changer.
[0030] One aspect also relates to a switchgear assembly having one or more vacuum interrupters according to one of the preceding embodiments with a bellows protector according to one of the preceding embodiments.
[0031] A further aspect relates to a tap changer having one or more vacuum interrupters, wherein one or more of the vacuum interrupters have a bellows protection according to one of the preceding embodiments.
[0032] Another aspect relates to a method for producing a vacuum interrupter with a bellows protector, wherein a bellows protector according to one of the preceding embodiments is attached to a vacuum interrupter. In particular, it is preferred that the bellows protector is attached to the vacuum interrupter by sliding it onto the vacuum interrupter, in particular by snapping it onto the vacuum interrupter.
[0033] Attaching the bellows protector to the vacuum interrupter means that the bellows protector does not move relative to the stationary parts of the vacuum interrupter, but rather that the moving contact moves relative to the bellows protector and relative to the stationary parts of the vacuum interrupter. Stationary parts of the vacuum interrupter include, for example, a first insulator, a second insulator, an intermediate element, or a fixed contact.
[0034] With regard to the device according to the invention, all statements made above and below regarding the method according to the invention apply accordingly, and vice versa. With regard to the advantages of the device according to the invention, reference is also made to the advantages described for the method according to the invention, and vice versa.
[0035] The invention is explained in more detail below using an exemplary embodiment. The specific embodiment of the exemplary embodiment is in no way intended to limit the general design of the method and device according to the invention; rather, individual design features of the exemplary embodiment can be freely combined with one another and with the features described above in any desired manner.
[0036] Figure 1 : Schematic representation of a switchgear;
[0037] Figure 2: Schematic representation of a vacuum interrupter from the prior art; Figure 3: Schematic representation of a vacuum interrupter with a one-piece bellows protection;
[0038] Figure 4 : Schematic representation of a vacuum interrupter with a two-part bellows protection.
[0039] Figure 1 shows a schematic representation of a switchgear 1. A medium-voltage switchgear is shown here as an example. However, a switchgear for low or high voltages which has a vacuum interrupter for switching an electrical current and / or an electrical voltage on or off is also possible. The switchgear can in particular contain one or more vacuum interrupters as a switching element, in particular vacuum interrupters which are designed as load switches or circuit breakers. The switchgear has display elements 4 which can contain displays such as a pressure display, switch position display or other status displays. The switchgear also has an operating panel 6 via which switching operations can be carried out, for example.
[0040] Figure 2 shows a schematic representation of a vacuum interrupter 10' from the prior art. The vacuum interrupter 10' has a cylindrical basic shape with a longitudinal axis 90. A fixed contact rod 34 extends along or parallel to the longitudinal axis 90 and is guided into the interior of the vacuum interrupter 10' through a fixed contact flange 38. A fixed contact disk 36 is connected to the fixed contact rod 34. A moving contact disk 32 on a moving contact rod 30 is connected to the fixed contact disk 36. The moving contact rod 30 is arranged, in particular soldered, with the moving contact disk 32 via a moving contact flange 31 with an external bellows 20 and a bellows shield element 43 so as to be movable on a first insulator 40.In the example shown in Figure 2, the first insulator 40, here an insulator made of a ceramic material, i.e. a ceramic insulator, is followed by an intermediate element 42, here a metallic intermediate element 42, which at the same time forms a further shielding element 42' inside the vacuum interrupter 10', which shielding element 42' radially surrounds it at a distance, at least in the position in which the fixed contact disk 36 and the moving contact disk 32 are in contact and the vacuum interrupter 10' is in a closed, i.e. current-conducting, state. The further shielding element formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or on the further insulator 50 in the event of a switching arc.
[0041] A further insulator 50 is connected to the intermediate element 42.
[0042] A shielding element 39 is connected to the additional insulator 50. The shielding element 39 also serves as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and an additional insulator 50 can be omitted and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0043] Figure 3 shows a schematic representation of a vacuum interrupter 10 according to the invention with a one-piece bellows protection 100 according to the invention.
[0044] The structure of the vacuum interrupter 10 is analogous to that of the vacuum interrupter 10' from the prior art and Figure 2. The vacuum interrupter 10 has a cylindrical basic shape with a longitudinal axis 90. A fixed contact rod 34 extends along or parallel to the longitudinal axis 90 and is guided into the interior of the vacuum interrupter 10 through a fixed contact flange 38. A fixed contact disc 36 is connected to the fixed contact rod 34. A moving contact disc 32 on a moving contact rod 30 is connected to the fixed contact disc 36. The moving contact rod 30 is arranged, in particular soldered, with the moving contact disc 32 via a moving contact flange 31 with an external bellows 20 so that it can move on a first insulator 40. A bellows shield element 43 is arranged between the bellows 20 and the first insulator 40.In the example shown in Figure 3, the first insulator 40, here an insulator made of a ceramic material, i.e. a ceramic insulator, is followed by an intermediate element 42, here a metallic intermediate element 42. Inside the vacuum interrupter 10, the intermediate element 42 simultaneously forms a further shielding element 42' or one or more further shielding elements 42' are arranged on the intermediate element. The arrangement of the further shielding elements 42' is designed such that at least in one position - in which the fixed contact disk 36 and the moving contact disk 32 are touching and the vacuum interrupter 10 is thus in a closed, i.e. current-conducting, state - the fixed contact disk 36 and the moving contact disk 32 are radially surrounded at a distance.The further shielding element formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or on the further insulator 50 in the event of a switching arc.
[0045] A further insulator 50 is connected to the intermediate element 42.
[0046] A shielding element 39 is connected to the additional insulator 50. The shielding element 39 also serves as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and an additional insulator 50 can be omitted and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0047] Figure 3 also shows the bellows protector 100 according to the invention. This bellows protector 100 is formed as a single piece and is divided into three sections. A portion of the vacuum interrupter 10 is located on the inner side 101 of the bellows protector 100, while the moving contact rod 30 is guided from the inner side 101 of the bellows protector 100 through the bellows protector 100 to the second side 102 outside the bellows protector 100.
[0048] The first region 110 of the bellows protector 100 has a taper, wherein the diameter of the bellows protector 100 in the first region 110 decreases from a diameter accommodating the bellows 20 to a diameter guiding the moving contact rod 30. This forms a guide, a bearing 112, for the moving contact rod 30. Optionally, further slots 155 for gas flow through the bellows protector 100 can be provided in the first region 110. Optionally, these further slots 155 in the first region 110 can also serve to make the bellows protector 100 more flexible for guiding the moving contact rod 30.
[0049] In the second region 120 of the bellows protection 100, the bellows protection extends largely parallel to the longitudinal axis 90 of the vacuum interrupter.
[0050] The holding region 130 here has, on the side facing the longitudinal axis 90 of the vacuum interrupter 10, an indentation 140 which, coming from the side with the moving contact rod 30 and the bellows 20, is guided over the first insulator 40 and is latched behind the first insulator 40, thus fastening the bellows protector 100 to and on the vacuum interrupter 10. In order to enable the holding region 130 to be guided over the first insulator 40, the bellows protector 100 has slits 150 which here extend from the start 125 of the slit 150 to one end of the bellows protector 100 with the indentation(s) 140. In particular, a large number of slits 150 are present here, in particular 4, 5, 6, 7 or more slits 150. Thus, a ring of flexible holding elements 130, each with an engagement 140, is formed, which ensures a firm fit on the vacuum interrupter 10 and at the same time an uncomplicated assembly.
[0051] Figure 4 shows a schematic representation of a vacuum interrupter 10 according to the invention with a two-part bellows protection 200 according to the invention.
[0052] The structure of the vacuum interrupter 10 is largely analogous to the vacuum interrupter 10' of Figure 2 known from the prior art and the vacuum interrupter 10 of Figure 3. However, in contrast to the previously described figures, the fixed contact rod 34 has a first locking recess 35 for receiving a further engagement 275 and for fastening a further bellows protection element 270 in a multi-part, here two-part, bellows protection.
[0053] The vacuum interrupter 10 has a cylindrical basic shape with a longitudinal axis 90. A fixed contact rod 34 extends along or parallel to the longitudinal axis 90 and is guided into the interior of the vacuum interrupter 10 through a fixed contact flange 38. A fixed contact disk 36 is connected to the fixed contact rod 34. A moving contact disk 32 on a moving contact rod 30 is connected to the fixed contact disk 36. The moving contact rod 30, together with the moving contact disk 32, is arranged, in particular soldered, on a first insulator 40 via a moving contact flange 31 with an external bellows 20. A bellows shield element 43 is arranged between the bellows 20 and the first insulator 40. In the example shown in Figure 4, the first insulator 40, here an insulator made of a ceramic material, i.e. a ceramic insulator, is followed by an intermediate element 42, here a metallic intermediate element 42.In the interior of the vacuum interrupter 10, the intermediate element 42 simultaneously forms a further shielding element 42', or one or more further shielding elements 42' are arranged on the intermediate element. The arrangement of the further shielding elements 42' is designed such that at least in one position - in which the fixed contact disk 36 and the moving contact disk 32 touch and the vacuum interrupter 10 is thus in a closed, i.e. current-conducting, state - the fixed contact disk 36 and the moving contact disk 32 are radially enclosed at a distance. The further shielding element 42' formed by the intermediate element 42 is particularly suitable for preventing or minimizing vapor deposition or material deposition on the first insulator 40 and / or on the further insulator 50 in the event of a switching arc.
[0054] An additional insulator 50 is connected to the intermediate element 42. A shielding element 39 is connected to the additional insulator 50. The shielding element 39 also serves as a connection to the fixed contact flange 38. Alternatively, the shielding element 39 and the additional insulator 50 can be omitted, and the fixed contact flange 38 can be connected directly to the intermediate element 42.
[0055] Figure 4 also shows the two-part bellows protector 200 according to the invention as an example of a multi-part bellows protector. This bellows protector 200 is formed here from the first bellows protector element 260 and the further bellows protector element 270. The first bellows protector element 260 is divided into three regions. A portion of the vacuum interrupter 10 is located on the inner side 201 of the bellows protector 200, while the moving contact rod 30 and the fixed contact rod 34 are guided from the inner side 201 of the bellows protector 200 through the bellows protector 200 to the second side 202 outside the bellows protector 200.
[0056] The first region 210 of the bellows protector 200 has a taper, wherein the diameter of the bellows protector 200 in the first region 210 decreases from a diameter accommodating the bellows 20 to a diameter guiding the moving contact rod 30. This forms a guide, a bearing 212, for the moving contact rod 30. Optionally, further slots 255 for gas flow through the bellows protector 200 can be provided in the first region 210. Optionally, these further slots 255 in the first region 210 can also serve to make the bellows protector 200 more flexible for guiding the moving contact rod 30.
[0057] In the second region 220 of the bellows protection 200, the bellows protection extends largely parallel to the longitudinal axis 90 of the vacuum interrupter.
[0058] The holding area 230 here has, on the side facing the longitudinal axis 90 of the vacuum interrupter 10, an indentation 140 which, coming from the side with the moving contact rod 30 and the bellows 20, is guided at least partially over the first insulator 40 and is engaged in a second locking recess 141 of the further bellows protection element, thus fastening the first bellows protection element 260 of the multi-part bellows protection 200 to and on the further bellows protection element 270 and thus to and on the vacuum interrupter 10. The further bellows protection element 270 is fastened to the fixed contact rod 34 with the further indentation 275 in the first locking recess 35 and widens in the direction of the moving contact flange 31 in order to accommodate part of the vacuum interrupter 10.Furthermore, the further bellows protection element 270 preferably has a further recess 142, so that the second locking depression is arranged in the region of the further recess 142 - here at the end facing the moving contact flange 31. More preferably, the first bellows protection element 260 has a first recess 262, wherein the engagement 140 is arranged in this first recess 262. Such a configuration makes it possible for the first bellows protection element 260 to be latched to the further bellows protection element 270 for fastening to the vacuum interrupter 10 and to be latched there. Alternatively, complementary threads are present in the first recess 262 and the further recess 142, so that the first bellows protection element 260 can be connected to the further bellows protection element 270 by screwing.
[0059] In order to enable the guiding of the holding region 230 over the first insulator 40 and the locking of the first bellows protection element 260 with the further bellows protection element 270, the first bellows protection element 260 has slots 250, which here extend from the beginning 125 of the slot 250 to one end of the first bellows protection element 260 with the indentation(s) 140. In particular, a plurality of slots 250 are present here, in particular 4, 5, 6, 7 or more slots 250. Thus, a ring of flexible holding elements 230, each with an indentation 140, is formed, which ensures a secure fit on the vacuum interrupter 10 and, at the same time, uncomplicated assembly. List of Reference Symbols
[0060] 1 switchgear;
[0061] 4 display elements;
[0062] 6 control panel;
[0063] 10 vacuum interrupters;
[0064] 10' state-of-the-art vacuum interrupter;
[0065] 20 bellows, external bellows of the vacuum interrupter 10, 10';
[0066] 30 moving contact rod;
[0067] 31 moving contact flange;
[0068] 32 moving contact disc;
[0069] 34 fixed contact rod;
[0070] 35 first locking recess in the fixed contact rod 34;
[0071] 36 fixed contact disc;
[0072] 38 fixed contact flange;
[0073] 39 screen element;
[0074] 40 first insulator, in particular made of a ceramic material, of the vacuum interrupter 10, 10';
[0075] 42 intermediate element, in particular metallic intermediate element;
[0076] 42' further screen element on the intermediate element 42;
[0077] 43 Bellows shield element between bellows 20 and first insulator 40;
[0078] 50 further insulator, in particular made of a ceramic material, of the vacuum interrupter 10, 10';
[0079] 90 Longitudinal axis of the vacuum interrupter 10, 10';
[0080] 100 bellows protection;
[0081] 101 inner side of the bellows protection 100;
[0082] 102 second side outside the bellows protection 100;
[0083] 110 first area of the bellows protection 100;
[0084] 112 bearings for a moving contact rod 30;
[0085] 120 second area of the bellows protection 100;
[0086] 125 Beginning of a slit 150;
[0087] 130 Holding range of the bellows protection 100;
[0088] 140 engagement on the holding area 130 or 230; second locking recess, in the further bellows protection element 270; further recess, in the further bellows protection element 270; slit, in particular for gas flow in the bellows protection 100; further slit, in particular for gas flow in the bellows protection 100;
[0089] Bellows protection in a multi-part design for a vacuum interrupter 10; inner side of the bellows protection 200; second side outside the bellows protection 200; first area of the bellows protection 200;
[0090] Bearing for a moving contact rod 30; second area of the bellows protection 200;
[0091] Holding range of the bellows protection 200;
[0092] Intervention at the holding area 230;
[0093] Slit for gas flow in the first bellows protection element 260; further slit for gas flow in the first bellows protection element 260; first bellows protection element of the multi-part bellows protection 200; first recess in the first bellows protection element 260; further bellows protection element of the multi-part bellows protection 200; further engagement for locking into the first locking recess 35 of the fixed contact rod 34; second further slit, in particular for gas flow, in the further bellows protection element 270.
Claims
Patent claims 1. Bellows protection (100, 200) for a vacuum interrupter (10) with external bellows (20) for low, medium or high voltages, characterized in that the bellows protection (100, 200) has at least: - a first region (110) which is tapered and is further designed to receive a moving contact rod (30) such that the moving contact rod (30) can be guided from an inner side (101) of the bellows protector (100, 200) out of the bellows protector (100, 200) to a second side (102) outside the bellows protector, wherein the tapered first region (110) of the bellows protector (100, 200) is designed to bear against the moving contact rod (30) such that the moving contact rod (30) is guided through the bellows protector (100, 200), - a second region (120) which adjoins the first region (110), the second region (120) being enlarged compared to the first region (110) such that the bellows (30) to be protected can be accommodated in the second region (120), and - a holding area (130), wherein the holding area is designed to fasten the bellows protection (100, 200) on or to the vacuum interrupter (10) in such a way that the bellows protection (100, 200) forms a guide for the moving contact rod (30).
2. Bellows protection (100, 200) according to claim 1, characterized in that the bellows protection (100, 200) has a guide region (112) in the first region (110), which is designed as a sliding bearing for the moving contact (30).
3. Bellows protection (100, 200) according to claim 1 or 2, characterized in that the first region (110) has further slits (155) and / or the second region (120) and / or third region (130) has slits (150) which allow gas circulation between the inner side (101) of the bellows protector (100) to the second side (102) outside the bellows protector (100, 200).
4. Bellows protection (100, 200) according to one of the preceding claims, characterized in that the bellows protection has ribs on the inner side (101) of the bellows protection (100, 200) and / or the second side (102) of the bellows protection (100, 200) perpendicular and / or parallel to the longitudinal axis (90) of the vacuum interrupter (100). Bellows protection (100) according to one of the preceding claims, characterized in that the bellows protection (100) is formed in one piece and the holding region (130) is designed to extend from the moving contact side over a first insulator (40) and to engage on the side of the first insulator (40) opposite the moving contact with an engagement (140) on the first insulator (40) or tube components adjoining the first insulator (40) in such a way that the bellows protection can be fastened on the vacuum interrupter.Bellows protection (200) according to one of claims 1 to 4, characterized in that the bellows protection (200) is formed in several parts, wherein the bellows protection (200) has at least a first bellows protection element (260) and a further bellows protection element (270), wherein the first bellows protection element (260) and the further bellows protection element (270) are connected or connectable to one another. Bellows protection (100, 200) according to one of the preceding claims. characterized in that the bellows protector (100, 200) is formed from an electrically insulating material and is designed to reduce or prevent electrical discharges or partial discharges. Vacuum interrupter (10), characterized in that the vacuum interrupter has a bellows protector (100, 200) according to one of claims 1 to 7. Switchgear (1) with a vacuum interrupter (10) according to claim 8 with a bellows protector (100, 200) according to one of claims 1 to 7. Tap changer (1) with one or more vacuum interrupters (10) according to claim 8, wherein one or more of the vacuum interrupters has a bellows protector (100, 200) according to one of claims 1 to 7. Method for producing a vacuum interrupter with a bellows protector, characterized in that a bellows protector according to one of claims 1 to 7 is attached to a vacuum interrupter.