Top conductor rail, overhead line arrangement with top conductor rail and method for manufacturing a top conductor rail
Patent Information
- Application Number
- CN202480087689.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-02-13
- Filing Date
- 2024-12-09
- Publication Date
- 2026-09-22
AI Technical Summary
[0004]在特定的极端气候条件下，例如在具有较高的空气湿度和/或矿物冲刷的隧道中或者在海边等地，虽然在（多个）顶部导电轨与滑触线之间的开放的可够着的接触位置处施加了润滑剂，可能仍然无法防止接触腐蚀，这使顶部导电轨的使用寿命显著缩短
[0014]通过对例如由铝或者铝合金制成的顶部导电轨涂覆含铬（III）的涂层、即基本上具有几百纳米厚度的氧化层，显著改善了（多个）顶部导电轨的机械抗压性能。因此，例如提高了其硬度、其耐磨性，因此也提高了其耐候性、特别是针对侵蚀性环境影响、例如抵御潮湿等的耐候性，由此这种顶部导电轨的使用寿命因此显著延长。在涂覆薄的含铬（III）的钝化涂层、即厚度在100至500纳米之间的由铬（III）-氧化物化合物形成的薄的氧化层的情况下，特别是耐腐蚀性显著提高，从而防腐保护显著增强，并且在这方面特别是也极其有效并且持久地防止发生接触腐蚀。由此实现了顶部导电轨的使用寿命的特别明显的延长。同时，涂层例如不会在减少摩擦方面产生不利影响，因此也不会减轻将滑触线从顶部导电轨中拉出的拉力。电力导电轨或者顶部导电轨与滑触线之间的电力引导和/或电力传输质量方面的性能同样基本上保持不变，从而对于对应的车辆的电力供应的品质因此也不受限制地得到保证。
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Figure CN122803920A_ABST
Abstract
Description
Background Technology
[0001] To enable access to city centers via short-distance rail transit, such as subways or urban rail transit, or even long-distance trains, railway lines often have to be laid in tunnels. Here, it is essential to ensure electric traction even under limited space, such as in tunnels with small or narrow cross-sections. For this purpose, top-mounted rails with a relatively low structural height are typically used. Pantographs or multiple pantographs can also travel on these top-mounted rails. Depending on the implementation, these top-mounted rails can be used not only in tunnels but also, for example, under bridges, in underpasses, on suspension bridges, in maintenance facilities, or in areas with swingable overhead lines, particularly in workshops for particularly simple vehicle inspections.
[0002] However, the use of electric conductive rails or top conductive rails is not limited to rail vehicles. On the contrary, suitable electric conductive rails or top conductive rails are also used in corresponding locations to supply power to non-rail vehicles, such as electric trucks (E-LKW) and electric buses (E-Bus).
[0003] The top conductor rail is typically made of extruded profile, and the conductor rail is clamped within this profile, through which electricity is transmitted to the relevant vehicle, as in conventional overhead lines in overhead line equipment. Here, the clamping connection must be conductive. Depending on structural conditions or requirements, the top conductor rail and conductor rail used may employ different materials, which often have different electrode potentials, thus posing a risk of contact corrosion. This could, for example, damage or, in particular, disintegration of the top conductor rail, which in turn could lead to or will cause the conductor rail to detach from the relevant conductor rail. This is typically addressed by applying a lubricant, such as lubricating oil or contact grease, in a defined manner between the different materials as the conductor rail enters the top conductor rail(s), thereby preventing contact corrosion between the conductor rail and the top conductor rail. Applying a lubricant, such as contact grease, between the conductor rail and the top conductor rail is an additional working step during installation.
[0004] Under certain extreme climatic conditions, such as in tunnels with high air humidity and / or mineral erosion, or at the seaside, even with lubricant applied at the open, reachable contact points between the top conductive rails and the sliding contact line, contact corrosion may still not be prevented, which significantly shortens the service life of the top conductive rails. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a top conductive rail with improved performance and a method for manufacturing the top conductive rail with improved performance.
[0006] The aforementioned technical problems are solved by the features of the independent claims. Further extensions and design schemes of the invention are derived from the features of the dependent claims.
[0007] To this end, a top conductive rail for overhead line equipment is provided, the top conductive rail having a fixing device for guiding a sliding contact line and at least one sliding contact line, wherein the at least one sliding contact line is connected to the top conductive rail by means of the fixing device, wherein the top conductive rail has at least partially a first coating and / or the at least one sliding contact line has at least partially a second coating, wherein the first and second coatings are respectively conductive.
[0008] The solution according to the invention enables the simple avoidance or at least significant reduction of contact corrosion between the top conductive rail(s) and the sliding contact line. Therefore, the corrosion resistance of the top conductive rail(s) is correspondingly improved by the corrosion-resistant coating of the top conductive rail(s) and / or at least one corrosion-resistant coating of the sliding contact line, thereby correspondingly increasing the service life of the top conductive rail(s). To effectively avoid or reduce contact corrosion between the top conductive rail(s) or the top conductive rail(s) and at least one sliding contact line, in principle, a first coating on the top conductive rail(s) or a second coating on the at least one sliding contact line is sufficient. Furthermore, the simultaneous application or use of both the first and second coatings is correspondingly more advantageous in terms of long-term durability. Thus, the continuous or uninterrupted electrification of tunnels, for example, in environments with corrosive conditions, is significantly improved, because the corresponding maintenance or repair work, particularly for replacing damaged top conductive rails, still must be performed at significantly longer intervals. Furthermore, due to the high conductivity of each of the two coatings, the conductivity between the top conductive rail and the sliding contact line is maintained at essentially the same level, thus ensuring the quality of power conduction and / or power transmission between (multiple) power conductive rails or between the top conductive rail and the sliding contact line without limitation. According to the invention, depending on structural conditions or requirements, coatings may be applied at least partially to the top conductive rail, or only to the sliding contact line, or both simultaneously, or even completely covered or encapsulated. Where partial coating is possible, it is advantageous, particularly at least correspondingly, to coat the areas of (multiple) top conductive rails and / or the sliding contact line at the respective locations where direct contact is possible, so as to continuously and effectively prevent contact corrosion between (multiple) top conductive rails and the sliding contact line that would form due to differences in materials and therefore typically different electrode potentials. In addition, of course, depending on the requirements or needs, besides the coating according to the invention, there is also the additional possibility of applying, i.e., applying, a lubricant, such as lubricating oil or contact grease, between the top conductive rail(s) and the sliding contact line as the sliding contact line enters the top conductive rail(s).
[0009] Preferably, the first and second coatings are made of different materials. Particularly preferred are that the first and second coatings, as well as the top conductive rail and at least one sliding contact line, are made of different materials. In this way, the materials of the corresponding first or second coatings can be selected as closely as possible to match, for example, the physical and / or chemical properties, of the different materials of the top conductive rail or the sliding contact line.
[0010] The top conductive rail is preferably made of extruded aluminum alloy profile. Extruded aluminum alloy profiles are particularly lightweight, making them advantageous for installation in space-constrained environments, such as tunnels, underground passages, or under bridges. Furthermore, their large cross-section allows for high energy transfer. In addition, extruded aluminum alloy profiles are crack-resistant, eliminating the need for grounding in cracked areas of overhead lines. Moreover, this top conductive rail design allows for replacement of only the sliding contact line when it reaches its wear limit.
[0011] Preferably, at least one conductor rail is made of copper or a copper alloy. This is particularly advantageous for power guiding and / or power transmission due to its high conductivity. Since pantograph sliders made of pure carbon material or copper-impregnated carbon material are preferably used, combined with conductor rails made of copper or copper alloys, the sliders in operation are typically equipped with a thin copper-containing layer, which could lead to contact corrosion when using conductor rails made of copper-free materials.
[0012] According to a particularly preferred embodiment of the invention, the top conductive rail is completely covered by a first coating. According to another preferred embodiment of the invention, at least one sliding contact line is completely covered by a second coating. This can be achieved in a particularly economical and advantageous manner by means of manufacturing techniques, because by means of electroplating methods, typically in a single working step, for example immediately after manufacturing the top conductive rail by extrusion methods, the desired or required coating can be used to completely, uniformly, and without gaps cover or cover the entire surface of the top conductive rail, thus providing durable and reliable protection against weather conditions or weather effects, corrosive media, etc., and therefore against corrosion, especially contact corrosion, in a simple and cost-effective manner. This is similarly applicable to the corresponding covering or coating of the sliding contact line with a second coating.
[0013] According to another particularly preferred embodiment of the invention, the first coating is implemented as a chromium (III)-containing coating. Further, the chromium (III)-containing coating is particularly preferably a chromium (III)-containing passivation coating having a thickness between 100 and 500 nanometers.
[0014] By coating the top conductive rails, for example, made of aluminum or aluminum alloys, with a chromium (III)-containing coating, i.e., an oxide layer substantially several hundred nanometers thick, the mechanical compressive strength of (multiple) top conductive rails is significantly improved. This, for example, increases their hardness and wear resistance, and thus also improves their weather resistance, particularly against the effects of corrosive environments, such as moisture, thereby significantly extending the service life of such top conductive rails. In the case of coating with a thin chromium (III)-containing passivation coating, i.e., a thin oxide layer formed of chromium (III)-oxide compounds with a thickness between 100 and 500 nanometers, corrosion resistance is significantly improved, resulting in significantly enhanced corrosion protection, and in this respect, it is particularly effective and durable in preventing contact corrosion. This achieves a particularly significant extension of the service life of the top conductive rails. At the same time, the coating does not adversely affect friction reduction, and therefore does not reduce the pulling force required to pull the contact wire out of the top conductive rail. The performance of the electric conduction and / or transmission quality between the electric conductive rail or top conductive rail and the sliding contact line remains essentially unchanged, thus ensuring the quality of the power supply to the corresponding vehicle without limitation.
[0015] According to another particularly preferred embodiment of the invention, the second coating is implemented as a tin-plated coating. Preferably, the tin-plated coating has a thickness between 1 and 30 micrometers.
[0016] By coating a sliding contact line, for example, made of copper or a copper alloy, with a tin-plated coating that is essentially made of tin and, where necessary, contains trace amounts of other materials, durable protection, such as corrosion protection, is achieved for at least one sliding contact line, similar to applying a first coating to the power conductor rail or top conductor rail. This, in particular, also provides durable protection against contact corrosion. Due to the tin layer, which is either applied to or covers at least one sliding contact line, and thus has a very high conductivity, the quality of power conduction and / or power transmission between the power conductor rail or top conductor rail and the sliding contact line is maintained, thereby correspondingly ensuring an unrestricted and continuous power supply to the corresponding vehicle. This is particularly advantageous when the thickness of the tin-plated coating is between 1 and 30 micrometers.
[0017] The overhead line equipment is particularly preferred to have at least one top conductive rail according to any one of claims 1 to 11.
[0018] Another aspect of the invention relates to a method for manufacturing a top conductive rail for overhead line equipment, the top conductive rail having a fixing device for guiding a sliding contact line and at least one sliding contact line, wherein the top conductive rail and the at least one sliding contact line are made of different materials, the method comprising the following steps:
[0019] - Provide at least a partial first coating for the top conductive rail, and / or
[0020] - A second coating is provided at least partially for at least one sliding contact line.
[0021] The first and second coatings are both conductive and made of different materials.
[0022] - The sliding contact line is connected to the top conductive rail using a fixing device.
[0023] Here, it is particularly preferable to use a first coating to completely cover the top conductive rail.
[0024] Here, it is preferable to use a second coating to completely cover at least one sliding contact line.
[0025] It is also preferred that the first coating be implemented as a chromium (III)-containing coating, and particularly preferred that the first coating be implemented as a chromium (III)-containing passivation coating with a thickness between 100 and 500 nanometers.
[0026] The second coating is preferably implemented as a tin-plated coating, and it is particularly preferred that the second coating be implemented with a thickness between 1 and 30 micrometers.
[0027] The embodiments or specific forms of the top conductive rails(s) described above according to the present invention, and in particular their advantages, can be applied comparatively to the methods mentioned, and therefore, in this respect, also apply to the methods mentioned and all their embodiments or specific forms. Attached Figure Description
[0028] The preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. In the drawings:
[0029] Figure 1 A cross-section of the top conductive rail according to the invention, having a first coating, is shown.
[0030] Figure 2 A cross-section of a sliding contact line with a second coating is shown.
[0031] Figure 3 A cross-section of the top conductive rail according to the invention, having a first coating and holding a sliding contact line having a second coating, is shown.
[0032] Figure 4 A schematic diagram of an overhead line device with an underground passage or tunnel exterior, a chain device, and a transition section to the top conductive rail according to the invention is shown.
[0033] exist Figures 1 to 4The same reference numerals are used to designate the same components accordingly. The dimensions or thicknesses of the first coating 7 and the second coating 9 shown in the figures are enlarged and not drawn to scale for ease of explanation or for clarity. Detailed Implementation
[0034] Figure 1 A cross-section of the top conductive rail 2 according to the invention, having a first coating 7, is shown. Figure 1 The top conductive rail 2 shown is made of extruded aluminum alloy profile.
[0035] The top conductive rail 2 has a common fixing device 4, which is made of two clamping arms 5 and 6. These two clamping arms 5 and 6 are configured to guide or clamp the rail. Figure 1 The sliding contact line 3 is only shown in a schematic diagram, and it is connected to the top conductive rail 2. The top conductive rail 2 is completely and continuously covered or coated with a first coating 7 along its entire length and on both end faces. This is a thin chromium (III)-containing passivation coating, i.e., a thin oxide layer with a thickness between 100 and 500 nanometers formed of chromium (III) oxide compounds, the length of which extends into the drawing plane (not visible here). This chromium (III)-containing passivation coating is corrosion-resistant and has high electrical conductivity. By completely and therefore without gaps surrounding the electric conductive rail or top conductive rail 2, the top conductive rail 2 is reliably and permanently protected against corrosive environmental conditions, especially weather conditions, or against weather effects, corrosive media, etc., and therefore against corrosion between the sliding contact line 3 and the top conductive rail 2, especially contact corrosion. The aforementioned thickness of the chromium (III)-containing passivation coating 7 is particularly suitable and effective for this purpose. Therefore, a significant extension of the service life of the top conductive rail 2 is achieved, thus minimizing the need for costly maintenance and operational interruptions at least after a significantly extended time interval. Furthermore, this enables electrification in areas with extreme climatic conditions, such as tunnels with high air humidity and / or mineral erosion, and coastal locations. Through manufacturing techniques, a chromium (III) passivation coating 7 of a desired thickness can be applied completely, uniformly, and without gaps to the entire surface of the power conductive rail or top conductive rail 2 using electroplating methods, such as a corresponding tauchbad.
[0036] Figure 2 A cross-section of the sliding contact line 3 with the second coating 9 is shown.
[0037] Figure 2The sliding contact line 3 shown is made of copper or a copper alloy and has common engagement parts 11 and 12, which are used for... Figure 1 The two clamping arms 5 and 6 (not shown here for clarity) of the fixing device 4 of the top conductive rail profile 2 clamp the sliding contact line 3 in the top conductive rail profile 2. By clamping the sliding contact line 3 with the clamping arms 5 and 6, contact positions 13 and 14 are automatically obtained, at which the sliding contact line 3 will be in direct contact with the top conductive rail 2 without the coating 9. The sliding contact line 3 is completely and continuously covered or coated with the second coating 9 at least along the entire contact length, that is, along the contact positions 13 and 14 (where the sliding contact line 3 has contact positions 13 and 14 with one or more top conductive rails 2, and the contact positions 13 and 14 extend into the drawing plane (not visible here)) along the entire length of the top conductive rails (multiple) of the top conductive rails 2. Here, the second coating 9 is advantageously a tin-plated coating with a thickness between 1 and 30 micrometers, which is essentially made of tin and contains trace amounts of other materials where necessary. The tin plating coating 9 is corrosion-resistant and has high electrical conductivity. By completely and therefore without gaps surrounding the sliding contact line 3, the coating 9 reliably and permanently protects the sliding contact line 3 from corrosive environmental conditions, especially weather conditions, or from the effects of weather, corrosive media, etc., and therefore from corrosion, thereby preventing contact corrosion between the sliding contact line 3 and the top conductive rail 2 in a particularly long-lasting manner. The tin plating coating 9 of the mentioned thickness is particularly suitable and effective for this purpose. Therefore, a significant extension of the service life of the top conductive rail 2 is also achieved in this way. Through manufacturing techniques, the desired thickness of tin plating coating 9 can also be completely, uniformly, and without gaps applied to the entire surface of the sliding contact line 3, or in particular, tin plating coating 9 of the desired thickness, in a particularly low-cost and advantageous manner, by means of an electroplating method.
[0038] Figure 3 The clamp holding is shown according to Figure 1 or Figure 2 The cross-section of the top conductive rail 2 of the sliding contact line 3 in the embodiment according to the present invention.
[0039] exist Figure 3In this configuration, the sliding contact line 3 is clamped by the clamping arms 5 and 6 of the fixing device 4 of the top conductive rail 2, and is thus connected to the top conductive rail 2. Due to the different electrode potentials of the two metals, aluminum (top conductive rail 2) and copper (sliding contact line 3), there is a risk of contact corrosion when these two materials come into direct contact under external conditions that promote corrosion, which in the present case would lead to the decomposition of the top conductive rail 2. This is avoided by two coatings 7 and 9, which completely cover the top conductive rail 2 and the sliding contact line 3, and are therefore present at the contact points 13 and 14 between the top conductive rail 2 and the sliding contact line 3 along their entire length, thus effectively and permanently preventing direct contact between the top conductive rail 2 and the sliding contact line 3, and thus preventing contact corrosion between the top conductive rail 2 and the sliding contact line 3.
[0040] To effectively avoid or reduce contact corrosion between the power conductive rail or top conductive rail 2 and the sliding contact line 3, in principle, one coating 7 of the top conductive rail 2 or one coating 9 of the sliding contact line 3 is sufficient. Furthermore, the simultaneous application or use of both coatings 7 and 9 is correspondingly more advantageous in terms of long-term durability. Therefore, continuous or uninterrupted electrification of tunnels, for example, in environments with conditions that promote corrosion, is significantly improved, because the corresponding maintenance or repair work, particularly for replacing damaged top conductive rails, still must be performed at significantly longer intervals.
[0041] Furthermore, due to the high conductivity of each of the two coatings 7 and 9, the conductivity between the (multiple) top conductive rails 2 and the sliding contact line 3 remains essentially unchanged, thus ensuring the quality of power guidance and / or power transmission between the (multiple) power conductive rails or between the top conductive rails 2 and the sliding contact line 3, thereby ensuring an unrestricted and continuous power supply for the corresponding vehicle.
[0042] In order to create a basis Figure 3 In the embodiments described above, the top conductive rail 2 for overhead line equipment 1 according to the invention is first coated with a first coating 7, i.e., a chromium (III) passivation coating with a thickness between 100 and 500 nanometers, by means of a suitable electroplating method. Then, similarly by means of a suitable electroplating method, a second coating 9, i.e., a tin-plated coating with a thickness between 1 and 30 micrometers, is applied to the sliding contact line 3. These two steps can also be performed in reverse order. Afterwards, the coated sliding contact line 3 is clamped at the engaging portions 11 and 12 of the sliding contact line 3 by means of the clamping arms 5 and 6 of the fixing device 4 of the top conductive rail 2, thus connecting the coated sliding contact line 3 to the similarly coated top conductive rail 2. The top conductive rail 2 thus manufactured according to the invention is suitable for use in overhead line equipment 1 and can be used there.
[0043] Figure 4 A schematic diagram of an overhead line device 1 with a transition section 20 of the top conductive rail 2 according to the invention in an area having a chain device 17 to an underground passage or tunnel 15 is shown.
[0044] Outside tunnel 15, Figure 4 The overhead line equipment 1, exemplarily shown, is implemented in a conventional structure as having a chain device 17 and multiple load-bearing cables 16, which are supported at a height h above the sliding contact line 3, and wherein the load-bearing cables 16 are connected to the sliding contact line 3 by means of a suspension member or suspension cable 18. Here, the transition region 20 for operating the overhead line equipment 1 by means of the multiple top conductive rails 2 according to the invention exemplarily begins inside an underground passage or tunnel 15, such as... Figure 4 As shown, the transition zone 20 begins at or before the start of the underground passage or tunnel 15, that is, it begins at or before the location where the corresponding vehicle, especially a rail vehicle, enters the underground passage or tunnel 15. Similarly, the transition zone 20 ends, for example, at or after the end of the underground passage or tunnel 15, that is, it ends at or after the location where the corresponding vehicle, especially a rail vehicle, exits the underground passage or tunnel 15. Furthermore, tension is also shown. The pulling force It acts in the axial direction of the sliding contact line 3 and attempts to pull the sliding contact line 3 out of the top conductive rail 2.
[0045] Here, in Figure 4 Shown or according to Figure 4 The implementation of an overhead line device 1 in an underground passage or tunnel having one or more top conductive rails 2 according to the invention or using one or more top conductive rails 2 according to the invention is merely exemplary and is not limited in any way to this embodiment, but also includes all possible other meaningful embodiments, applications or fields of use without limitation.
[0046] Furthermore, this invention is not in any way limited to what has been done so far. Figures 1 to 4 The embodiments described and illustrated herein also include all other possible and meaningful embodiments of the invention, such as including or maintaining two or more top conductive rails of sliding contact lines.
[0047] Regardless of the grammatical gender of a particular term, people who are male or female are included.
Claims
1. A top conductive rail (2) for an overhead line device (1), the top conductive rail having a fixing device (4) for guiding a sliding contact line (3) and at least one sliding contact line (3), wherein, The at least one sliding contact line (3) is connected to the top conductive rail (2) by means of the fixing device (4), wherein the top conductive rail (2) and the at least one sliding contact line (3) are made of different materials. Its features are, The top conductive rail (2) has at least a partial first coating (7), and / or the at least one sliding contact line (3) has at least a partial second coating (9), wherein the first and second coatings (7, 9) are conductive.
2. The top conductive rail (2) according to claim 1. Its features are, The first and second coatings (7, 9) are made of different materials.
3. The top conductive rail (2) according to claim 1 or 2. Its features are, The first and second coatings (7, 9), the top conductive rail (2), and the at least one sliding contact line (3) are made of different materials.
4. The top conductive rail (2) according to any one of the preceding claims. Its features are, The top conductive rail (2) is implemented as an aluminum alloy extruded profile.
5. The top conductive rail (2) according to any one of the preceding claims. Its features are, The at least one sliding contact line (3) is made of copper or a copper alloy.
6. The top conductive rail (2) according to any one of the preceding claims. Its features are, The top conductive rail (2) is completely covered by the first coating (7).
7. The top conductive rail (2) according to any one of the preceding claims. Its features are, The at least one sliding contact line (3) is completely covered by the second coating (9).
8. The top conductive rail (2) according to any one of the preceding claims. Its features are, The first coating (7) is implemented as a chromium (III) coating.
9. The top conductive rail (2) according to claim 8. Its features are, The chromium (III)-containing coating is a chromium (III)-containing passivation coating with a thickness between 100 and 500 nanometers.
10. The top conductive rail (2) according to any one of the preceding claims. Its features are, The second coating (9) is applied as a tin-plated coating.
11. The top conductive rail (2) according to claim 10. Its features are, The tin-plated coating has a thickness between 1 and 30 micrometers.
12. An overhead line device (1) having at least one top conductive rail (2) according to any one of claims 1 to 11.
13. A method for manufacturing a top conductive rail (2) for an overhead line device (1), the top conductive rail (2) having a fixing device (4) for guiding a sliding contact line (3) and at least one sliding contact line (3), wherein, The top conductive rail (2) and the at least one sliding contact line (3) are made of different materials, and the method includes the following steps: -The top conductive rail (2) is at least partially coated with a first coating (7), and / or - A second coating (9) is provided at least partially for the at least one sliding contact line (3). The first and second coatings (7, 9) are conductive and made of different materials. - The sliding contact line (3) is connected to the top conductive rail (2) by means of the fixing device (4).
14. The top conductive rail (2) according to claim 13. Its features are, The top conductive rail (2) is completely covered by the first coating (7).
15. The top conductive rail (2) according to claim 13 or 14. Its features are, The at least one sliding contact line (3) is completely covered by the second coating (9).
16. The method for manufacturing a top conductive rail (2) for an overhead line device (1) according to any one of claims 13 to 15, Its features are, The first coating (7) is implemented as a chromium (III) coating.
17. The method for manufacturing a top conductive rail (2) for an overhead line device (1) according to claim 16, Its features are, The chromium (III)-containing coating is implemented as a chromium (III)-containing passivation coating with a thickness between 100 and 500 nanometers.
18. The method for manufacturing a top conductive rail (2) for an overhead line device (1) according to any one of claims 13 to 17, Its features are, The second coating (9) is implemented as a tin-plated coating.
19. The method for manufacturing a top conductive rail (2) for an overhead line device (1) according to claim 18, Its features are, The tin plating coating is implemented to have a thickness between 1 and 30 micrometers.