Busbar and trunking rail for lighting or other electrical equipment

Abstract

A bus bar (110, 120) for a lighting device or other electrical device has a plurality of bus bar sections which can be connected to one another and each have a plurality of lines (111, 121) extending in the longitudinal direction for supplying power and / or signaling, the lines (111, 121) being arranged in grooves (113, 123) of a line receiving structure (112, 122) made of an insulating material, said grooves opening towards the contact side. Electrical contacts (50) are arranged in the connection region of the two consecutive busbar sections, to which contacts (50) ends of the two lines (111, 121) to be connected to each other can be connected, and which contacts (50) form a contact surface (51) that can be accessed from the contact side, at least one electrical contact (50) being removable in order to interrupt the connection of the corresponding line (111, 121) between the two consecutive busbar sections.

Description

[0001] The present invention relates to a busbar for lighting equipment and / or other electrical equipment and a cable duct system comprising at least one corresponding busbar.

[0002] A busbar is characterized in that conductors or lines for supplying power or for other purposes are accessible or contactable over at least a larger elongated section, which opens up the possibility of being able to position the power consumers to be connected more or less flexibly at least over this section. Thus, power consumers, such as lighting devices of a continuous row lighting system, can be arranged not only at fixed predetermined positions, but also freely positioned at almost any desired position.

[0003] A known trunking system in which such a busbar is used is marketed by the applicant under the name "TECTON". A special feature of this trunking system is that the cables for the power supply provide a normal mains supply voltage of, for example, 250 volts, but are nevertheless accessible for contacting without interruption over the entire length of the trunking system. This is achieved by arranging the lines in a line receiving structure consisting of insulating material, etc., which forms a groove that is open towards the contact side. From this contact side, the lines can then be contacted with lighting devices or other power consumers connected to the trunking system, whereby, however, the grooves as well as the individual components of the line receiving structure are designed in such a way that accidental contact with the current-carrying lines is prevented. In this way, corresponding safety regulations are implemented, by which accidental contact with the lines is to be prevented.

[0004] The lines of the busbars should usually extend over the entire length of the trunking system. This applies in particular to the phase and neutral conductors of the power supply, for example, a voltage of 230 volts is supplied to lighting devices or other electrical devices via the phase and neutral conductors. Since it is not feasible to manufacture a line receiving structure with a plurality of corresponding lines of different lengths, the trunking rail elements equipped with busbar sections are usually only provided in a few standard lengths (for example, 1m, 2m and 3m lengths), wherein these trunking rail elements and their busbar sections are then connected to each other when the trunking system is installed. However, in the above-mentioned "TECTON" system, specific electrical contacts are also used in the connection area of ​​two consecutive trunking rail elements, and the electrical contacts ensure that contact possibilities are also provided for lighting devices or other electrical devices in these connection areas. In this way, the line sections of the trunking rail elements together with the electrical contacts form a continuous, contactable electrical line from the beginning of the busbar to its end, which is a unique feature of this known trunking system.

[0005] On the other hand, in certain cases, it may be necessary to interrupt at least some of the lines of the busbar in order to form sub-sections that are not electrically connected to each other. This situation may occur, for example, when some of the lines of the busbar are used to provide a safety extra-low voltage (SELV), which can be used directly by electrical equipment connected to the busbar. For example, a specific lighting device or other light source with LEDs that directly use the safety extra-low voltage provided by the busbar can be used. These devices are cheaper because they do not require special components such as converters to convert the normal supply voltage of 230 volts into a lower voltage for driving LEDs. Using some of the lines of the busbar to provide such protective extra-low voltages thus improves the flexibility of the entire system. However, since the length of the line providing SELV is limited, it is usually meaningless to use busbar lines extending over the entire length of the line duct system for this purpose. In this case, it may be necessary to interrupt the corresponding lines of the busbar in order to obtain several sub-sections, which are then each supplied with a safety extra-low voltage.

[0006] Another scenario for interrupting the lines of a wire duct system is interrupting the lines for data communication. Since the number of devices that can be individually addressed in the known DALI standard is limited, interrupting the busbar lines may also be helpful, because a separate communication bus can be implemented, which increases the number of devices that can be individually contacted.

[0007] It is therefore an object of the present invention to provide a busbar which makes it possible to interrupt at least some of the lines of the busbar individually in order to achieve separate busbar subsections.

[0008] According to the present invention, a busbar for lighting equipment or other electrical equipment is provided.

[0009] A plurality of busbar sections are provided, which can be connected to each other and each have a plurality of lines extending in the longitudinal direction for power supply and / or signal transmission, the lines being arranged in grooves open toward the contact side of a line receiving structure made of insulating material,

[0010] wherein an electrical contact is arranged in the connection region of two consecutive busbar sections, the ends of two lines to be connected to each other can be connected to the electrical contact, and the electrical contact forms a contact surface accessible from the contact side,

[0011] And wherein at least one of the electrical contacts is removable so as to interrupt the connection of the corresponding line between two consecutive busbar sections.

[0012] The invention is therefore based on the idea that the electrical contacts which are actually used to provide a continuous contact possibility over the entire length of the trunking system are arranged so that they can be removed individually in the event that it is decided that the respective line should be divided into individual sections. This can be done easily when installing the trunking system, wherein in particular it is not necessary to replace parts of the busbars with replacement elements or even to cut the lines in order to obtain the desired subdivisions.

[0013] Preferably, a plurality of electrical contacts are arranged in a connector element, which has a groove-shaped recess corresponding to the groove of the line receiving structure for the line, and the contact surface of the electrical contact can be touched via the recess. This connector element is preferably composed of a shell of insulating material and is comparable to the connector elements used in the past in the corresponding wire duct system. However, compared with this previous type, the new connector element used according to the present invention is open or can be opened at its rear side opposite to the recess to enable selective removal of at least one electrical contact. This solution allows the user to remove the electrical contacts when installing the wire duct system without any tools. In particular, the back of the connector element can be arranged so that it can be closed by a removable cover or cover, preferably by a cover pivotally mounted on the mechanical connector.

[0014] The present invention also provides a wire groove rail for lighting equipment or other electrical equipment, the wire groove rail comprising a wire groove rail profile and at least one busbar as described above held by the wire groove rail profile. Preferably, the wire groove rail profile is formed by a plurality of wire groove rail elements arranged one after the other, wherein the electrical contact is arranged in a transition region between two consecutive wire groove rail elements.

[0015] According to a preferred embodiment of the invention, two continuous linear groove rail elements are mechanically connected to each other by a mechanical connector element, wherein the removable electrical contact is arranged on the mechanical connector. In particular, the mechanical connector has at least one wall, the electrical contact is arranged on the wall, wherein the wall has an opening, the opening allowing access to the removable electrical contact.

[0016] The advantage of the above solution is that the selected electrical contacts can be removed before two consecutive line rail elements are connected to each other. In this case, the removal of the electrical contacts is easily performed since the electrical contacts are only connected to one end of the respective line. The solution also ensures that the interruption of the line is achieved before the busbar is connected to an external power source.

[0017] Safety can be further improved if the mechanical connector and the wire duct rail element are arranged so that, when joined together, the wire duct rail element laterally surrounds the mechanical connector in a manner that prevents access to the electrical contacts. This means that once the complete wire duct system has been assembled, the removable electrical contacts are no longer accessible and there is no longer any risk that individual wires are accidentally touched.

[0018] Preferably, the line comprising the removable electrical contacts is used for providing a safety extra-low voltage or for communication purposes, in particular for communication according to the DALI standard.

[0019] Analogously to known trunking systems, the trunking rail profile according to the invention preferably has a U-shaped or H-shaped profile with two side walls, wherein a busbar according to the invention is arranged on the inner side of at least one side wall.

[0020] In the following, the present invention is discussed in more detail with reference to the accompanying drawings:

[0021] Figure 1 A cross-section of a trunking rail system comprising two busbars is shown.

[0022] Figure 2 A perspective view of the end of a wire channel rail element with a mechanical connector is shown.

[0023] Figure 3 A perspective view of an electrical contact used in an embodiment of the present invention is shown.

[0024] Figure 4 A portion of a lighting device or another electrical device to be attached to the wireway track system of the present invention is shown.

[0025] Figure 5 A perspective view of the end of a wire channel rail element of the present invention is shown with a mechanical connector which together with the connector element allows for removal of at least some of the electrical contacts.

[0026] Figure 6 Shows Figure 5 A mechanical connector of an embodiment wherein a cover of the connector is opened.

[0027] Figure 7 A perspective view of an end of a mechanical connector with closed connector elements according to a second embodiment of the invention is shown.

[0028] Figure 8 Shows Figure 7 A second embodiment of the mechanical connector, wherein the cover of the connector element is opened.

[0029] As already mentioned, the present invention represents in particular a further development of the known "TECTON" system. Therefore, before describing the solution according to the invention in more detail, reference will be made to Figures 1 to 4 The basic design of this known wire groove rail system is explained. Here, Figure 1 and Figure 2 A view of a trunking rail in which a busbar is arranged is shown. Figure 3An electrical contact for connecting the lines of two consecutive busbar sections is shown, and Figure 4 The design of lighting equipment connected or to be connected to the wire trough track system is shown.

[0030] It can first be seen here that in the illustrated wire groove rail system 100, an elongated wire groove rail profile 101 with a U-shaped cross section and open at the bottom is used, which defines an elongated receiving space with its two side walls 102 and an upper connecting wall 103, which can be accessed from the bottom via an elongated connecting opening.

[0031] In the case shown, a busbar 110 or 120 is arranged on the inner side of the two side walls 102 (in the case of only the groove rail profile 101 shown). Figure 2 The busbars are not shown in the figure, each of which has a plurality of uninsulated wires or lines 111, 121 extending in the longitudinal direction. These lines 111, 121 are arranged in elongated channels or grooves 113, 123 of a line receiving structure 112, 122 made of insulating material. The channels 113, 123 are used here to reliably mount the lines 111, 121 so that they cannot be accidentally touched. But at the same time, the channels 113, 123 are each designed to be open toward the inside of the line groove rail profile 101, so that contact of the conductors 111, 121 is possible.

[0032] If available Figure 4 As can be seen in FIG. 1 , a lighting device 130 to be connected to this wire trough rail system 100 then has at least one rotatably mounted contact element 135. In order to connect the lighting device 130 to the wire trough rail system 100, the lighting device 130 or any other electrical device to be used with the wire trough rail system 100 is placed from the lower side against the elongated wire trough rail profile 101. The contact element 135 is inserted into the receiving space of the wire trough rail profile 101 via the elongated coupling opening and then rotated by approximately 45°. The contacts 136 arranged on the contact element 135 are designed so that they are laterally swung outwards by rotation and then engage in the receiving channels 113, 123 of the two busbars 110, 120 in order to contact the corresponding lines 111, 121. At the same time, the latching element 137 of the lighting device 130 also engages in the corresponding recess of the wire trough rail profile 101 in order to mechanically fix the lighting device 130 to the wire trough rail profile 101.

[0033] In the known "TECTON" system, the longitudinal line receiving structures 112, 122 are formed by a plurality of individual line receiving elements which are connected to one another to form the longitudinal structure. These elements are joined to one another so that a channel for safely accommodating the lines is also formed in the connection area of ​​two consecutive elements. In this way, the busbars 110, 120 used in the above-described line groove rail system 100 can be realized continuously in any desired length.

[0034] However, for manufacturing reasons, the line receiving structures or trough rail profiles consisting of insulating material, which represent the supporting elements of the continuous row lighting system, are only manufactured and shipped up to a certain length. Therefore, in the systems known from the prior art, the corresponding trough rail elements equipped with busbar sections are provided in a limited number of standard lengths, whereby the trough rail elements as well as the busbar sections must be connected to one another on site when installing the continuous row lighting system.

[0035] Another special feature of the known "TECTON" system is that it is also possible to position lighting or other electrical equipment and contact the lines of the busbar in the area where two consecutive line channel rail elements and corresponding busbar sections are connected to each other. This can be achieved by using special electrical connection contacts, such as Figure 3 Those shown in .

[0036] Figure 3 A single electrical contact 50 is shown, such as is currently used in the "TECTON" system and known, for example, from EP 1 284 033 B1. This electrical contact 50 consists of an elongated contact plate 51 bent on its longitudinal sides, the function of which is to receive and transfer the current of a line guided along the busbar. To this end, a spring contact 52 is arranged at each end of the contact plate 51, which makes it possible to contact the end regions of the lines of the two busbar sections to be connected to each other in a clamping manner.

[0037] like Figure 2 As shown, in the transition area of ​​two wire groove rail elements 105 to be connected to each other in the continuous row lighting system (here, the end surface area of ​​one wire groove rail element 105 to be connected to another wire groove rail element 105 of the same design is shown), a connector element 60 is also provided, which is used to accommodate the electrical contact 50. These connector elements 60 are made of insulating material and have groove-shaped recesses 61 corresponding to the receiving channels 113, 123 of the line receiving structures 112, 122, and the electrical contact 50 is inserted into the connector element 60 so that the contact plate 51 of the electrical contact 50 can be touched via the groove-shaped recess 61.

[0038] In addition, the mechanical connection of the two continuous wire groove rail elements 105 is achieved by means of a mechanical connector 70. This U-shaped connector 70 is inserted approximately halfway into each of the ends of the wire groove rail element 105 to mechanically stabilize the resulting structure. A connector element 60 with electrical contacts 50 is attached to the inner side of the two side walls 71, 72 of the mechanical connector 70.

[0039] The recess 61 of the connector element 60 continues the receiving channels 113, 123 of the line receiving structures 112, 122, and the contact plate 51 bridges the lines of the busbar sections to connect them to each other. This ultimately results in that there is always a contact possibility for connecting lighting devices or other electrical devices in the connection area of ​​two continuous wire duct rail elements 105, so that there is actually an uninterrupted contact possibility along the entire length in the known wire duct system. Compared with other known systems, this achieves outstanding flexibility in terms of the possibility of arranging lighting devices or other electrical devices.

[0040] The uninterrupted contact possibility along the entire length of the entire line rail system is particularly preferred for lines for regular power supply, in which high voltages of, for example, 230 volts are supplied. For example, the different phases of the power supply and in particular the neutral line should be uninterrupted in order to ensure that a reliable and safe power supply is obtained for lighting devices or other devices without the risk of short circuits.

[0041] On the other hand, in certain cases, disconnections or interruptions in at least some of the lines of the busbar may be beneficial. As mentioned above, if some of the lines are used to supply safety extra low voltage (SELV), reliable power supply to electrical equipment is only possible over a limited length. In addition, the number of devices that can be powered via a single SELV circuit is limited compared to high-voltage power supply circuits. On the other hand, the use of such SELV devices has some advantages, such as avoiding the need for converters or other complex and expensive drivers for devices (such as LED light sources). In this case, it is desirable to give the user the possibility to divide the lines of the busbar into specific subsections, which are then each provided with SELV.

[0042] Another situation is that the lines used for DALI communication are divided in order to obtain several individual DALI sub-buses following each other in the longitudinal direction. This solution allows increasing the number of lighting devices and / or other devices that can be addressed individually from a central control unit by using DALI communication.

[0043] The present invention now provides a solution that increases flexibility and thus reduces planning complexity. In particular, with the new solution the user is able to divide specific lines of the busbar only when installing the trunking system. However, there is no need to order and use a specific electrical connection solution that corresponds to the final design of the entire trunking system, i.e., to the way how the different lines of the busbar are ultimately used during operation of the trunking system.

[0044] According to the solution of the invention, the ability to divide the line of the busbar is included in the connector element for connecting the busbar sections of two consecutive line rail elements, which means that no additional components or elements need to be used to introduce breaks in the line.

[0045] The solution of the invention makes use of particular reference to Figure 2 and Figure 3 The element in question. Likewise, a connector element consisting of insulating material is used to hold a plurality of electrical contacts which are arranged to connect the lines of two consecutive busbar sections. However, in the event that it is desired to interrupt the corresponding line of the busbar, the electrical contacts can now be removed individually from the connector element.

[0046] Figure 5 and Figure 6 This concept according to the invention is shown in detail, wherein identical elements are given identical reference numerals.

[0047] Similar to Figure 2 ,exist Figure 5 1 shows the end of a schematically illustrated wire groove rail element 105, which is provided with a mechanical connector 70 for mechanically connecting two consecutive wire groove rail elements 105. The mechanical connector 70 is at least partially, preferably about 50%, inserted into the end of the wire groove rail element 105, the other part of the mechanical connector 70 extending over the end of the wire groove rail element 105 and inserted into the next wire groove rail element when the entire system is installed.

[0048] In order to improve the stability of the arrangement, the mechanical connector 70 is fixed to the wire groove rail element 105 by riveting or other means. In addition, the top surface 103 of the free extension of the mechanical connector 70 is provided with additional clamping elements or latching elements 75 that interact with the next wire groove rail element to be connected, which improves the connection with the next wire groove rail element once it slides over the free extension of the mechanical connector 70.

[0049] This portion of the mechanical connector 70 that extends over the end of the wire rail element 105 also houses the connector element 60 having the electrical contacts 50, similar to those known in the prior art and in Figure 2These connector elements 60 are already connected to the lines extending along the wire channel rail element 105 to which the mechanical connector 70 elements are attached. In case the next wire channel rail element is slid over the mechanical connector 70 to make the mechanical connection, the corresponding lines of this next wire channel rail profile will also be inserted in the corresponding spring contacts 52 of the electrical contacts 50 in order to obtain the electrical connection of the busbar lines extending through the wire channel rail profile 105.

[0050] However, if Figure 6 As shown, the mechanical connector 70 and the connector element 60 holding the electrical contacts 50 are constructed so that if necessary, the electrical contacts 60 can now be removed individually. In order to provide this option, first, the connector element 60 is adapted on its rear side opposite to the recess 61 corresponding to the grooves 113, 123 of the line receiving structure 112, 113, so that the electrical contacts 50 are accessible and can be selectively removed in the case where the corresponding lines of the busbars 120, 130 should be divided or interrupted. In the prior art, the rear side of the connector element 60 is completely closed and protected by the corresponding side walls 71, 72 of the mechanical protection member 70, and now the access to the electrical contacts 50 is provided, thereby allowing one or several contacts 50 to be removed without the need to use any tools.

[0051] In this regard, it must be noted that according to the solution of the invention, most preferably, the electrical contact 50 is removed from the connector element 60 before the wire groove rail element 105 is connected to another wire groove rail element. In this case, the electrical contact 50 to be removed is connected to the corresponding line only on one side and can therefore be easily removed from the connector element 60 by simply pulling the electrical contact 50 out of the corresponding cavity in the connector element 60 and pulling the spring contact 52 away from the wire.

[0052] In order to particularly protect the electrical contacts 50 to be held in the connector element 60, the rear side of the connector element 60 (which can be accessed via a corresponding opening 73 in the side wall 71 of the mechanical connector 70) is preferably not permanently open. Figure 5 and Figure 6As shown, the connector element 60 preferably has a removable cover 67, which can be completely removed or, in this case, rotated upwards in order to gain access to the interior of the connector element 60. The solution shown in the figures is the preferred solution, since the openable cover 67 is still permanently connected to the connector element 60. However, as an alternative solution, it would also be feasible to provide a cover 67 that is locked to the remaining housing of the connector element 60 and can be removed (for example by using a screwdriver) to open the rear of the connector element 60 and gain access to the electrical contacts 50. In both variants, the cover 67 is preferably fixed to the connector element 60 in the closed state to prevent accidental opening of the rear side of the connector element (60).

[0053] Of course, as an alternative solution, it is also possible to use a rear opening connector element 60 and to provide a mechanical connector 70 having a hinged or removable cover which can be selectively opened to gain access to the connector element 60 and remove some of the electrical contacts 50 .

[0054] As mentioned before, the removal of the electrical contact 50 should take place before the line trough element 105 is connected to the next line trough element 105. In the solution shown in the figures, this provides an additional safety mechanism, because once two line trough elements 105 have been connected to each other, the extension of the mechanical connector 70 accommodating the connector element 60 with the removable contact 50 is completely covered by the next line trough element 105. In this case, access to the removable contact 50 is no longer available and there is therefore no risk that the current-carrying lines are touched during operation of the line trough system.

[0055] The invention thus provides a very fast and efficient possibility to divide some lines of a busbar system in case it is desired to obtain several subsystems. The flexibility of the customer is significantly increased, since the customer only needs to decide whether to divide a line before the final installation of the system. Another advantage is that the customer has complete freedom to decide which line of the busbar should be divided.

[0056] On the other hand, in order to ensure reliable function of the trunking system, at least some of the lines of the busbar will most likely never be interrupted or divided. This is the case, for example, for lines that provide a conventional power supply of, for example, 230 volts. In order to avoid situations where the customer inadvertently interrupts these lines, the openings in the mechanical connector and / or the connector elements on the rear side thereof can be designed so that access is only available for a limited number of electrical connectors. Only these electrical contacts can then be removed by the customer, while the other electrical contacts remain permanently in the connector elements, thereby ensuring that the corresponding lines extend from one end of the trunking rail to the other without any interruption.

[0057] exist Figure 7and Figure 8 This solution is shown in Figure 7 and Figure 8 An alternative inventive design of a mechanical connector 70 and a corresponding connector element 60 is shown, wherein the same reference numerals are used. The two figures show only the relevant end of the mechanical connector 70 that receives the connector element 60; the rest of the mechanical connector 70 is similar to Figure 5 and Figure 6 The embodiment shown, and is also inserted into the end of the wire groove rail element 105.

[0058] Likewise, the mechanical connector 70 has an opening 73 on its side wall 71 which provides access to the rear side of the connector element 60, which is arranged on the inner side of the side wall 71. However, now, this opening 73 is configured to allow access to only a portion of the connector element 60, in the embodiment shown, only the upper portion of the connector element 60 that receives, for example, three upper electrical contacts 50. The lower portion of the rear side of the connector element 60 is now covered by the side wall 71 of the mechanical connector 70 and is no longer accessible once the connector element 60 has been attached to the inner side of the mechanical connector 70. As can be seen in these two figures, the side wall 71 of the mechanical connector 70 has a small opening or slot 74, which is engaged by a small protrusion 62 extending from the rear of the connector element 60. Although this measure is not necessary for implementing the inventive concept, this opening / slot 74 and the corresponding protrusion 62 help to fix the connector element 60 in the desired position on the mechanical connector 70.

[0059] Similar to Figure 5 and Figure 6 In the embodiment of the present invention, the part of the connector element 60 accessible via the opening 73 is preferably not permanently open on its rear side, but is likewise covered by an openable cover 67, which can be removed for the purpose of removing some of the electrical contacts 50. This cover 67 can now be swiveled downwards, which is likewise a preferred solution, since the openable cover 67 is still permanently connected to the connector element 60 and can therefore not be lost.

[0060] In this embodiment, only the three upper lines of the busbar can now be interrupted. These lines are then preferably used for DALI communication or for providing SELV, which lines can be easily interrupted in the event that the customer decides to implement a subsection of the DALI bus or a subsection for SELV supply. In contrast, the contact elements of the other lines that should not be interrupted are permanently protected and cannot be removed.

[0061] It should be emphasized that the concept according to the invention has been discussed with respect to a preferred embodiment using a busbar that provides uninterrupted contact capability along the entire length of the system. However, the solution according to the invention can also be used for less complex busbar systems that allow contacting the lines only in certain sections. In these cases, too, the entire system is usually formed by connecting a plurality of busbar sections by means of electrical connection members with electrical contacts that allow connection by a simple plug-in operation. Here, it may also be necessary to interrupt or divide at least some of the lines of the system, which in turn can be achieved according to the invention by designing the connection members in such a way that some of the electrical contacts can be removed.

Claims

1. A busbar (110, 120) for lighting equipment or other electrical equipment, A plurality of busbar sections are provided, which can be connected to each other and each have a plurality of lines (111, 121) extending in the longitudinal direction for power supply and / or signal transmission, wherein the lines (111, 121) are arranged in grooves (113, 123) open toward the contact side of a line receiving structure (112, 122) made of insulating material, in, An electrical contact (50) is arranged in the connection region of two consecutive busbar sections, to which the ends of two lines (111, 121) to be connected to each other can be connected, and which forms a contact surface (51) accessible from the contact side, The busbar is characterized in that: At least one of the electrical contacts (50) is removable in order to interrupt the connection of the corresponding line (111, 121) between two consecutive busbar sections.

2. The busbar according to claim 1, It is characterized in that A plurality of electrical contacts (50) are arranged in a connector element (60), which has a groove-shaped recess (61) corresponding to the groove (113, 123) of the line receiving structure (112, 122), via which the contact surface (51) of the electrical contacts (50) is accessible.

3. The busbar according to claim 2, It is characterized in that The connector element (60) is made of insulating material.

4. The busbar according to claim 3, It is characterized in that The connector element (60) is open or can be opened at its rear side opposite the recess (61) so as to be able to selectively remove the at least one electrical contact (50).

5. The busbar according to claim 4, It is characterized in that The rear side of the connector element (60) is covered by a removable cover (67), preferably by a cover (67) pivotally mounted on the connector element (60).

6. The busbar according to claim 5, It is characterized in that The cover (67) is fixed to the connector element (60) in the closed state.

7. The busbar according to any one of claims 4 to 6, It is characterized in that The connector element (60) is designed so that only a portion of the electrical contact (50) is accessible and thus removable.

8. A cable trough system (100) for lighting equipment or other electrical equipment, The invention comprises a grooved rail profile (101) and at least one busbar (110, 120) according to any one of the preceding claims, which is retained by the grooved rail profile (101).

9. The wire groove rail system according to claim 8, It is characterized in that The wire groove rail profile (101) comprises a plurality of wire groove rail elements (105) arranged one behind the other, and the electrical contact (50) is arranged in a transition region between two consecutive wire groove rail elements (105).

10. The wire groove rail system according to claim 9, It is characterized in that Two continuous linear rail elements (105) are mechanically connected to each other by means of a mechanical connector (70), on which the removable electrical contact (50) or the connector element (60) is arranged.

11. The wire groove rail system according to claim 10, It is characterized in that The mechanical connector (70) has at least one wall (71, 72) on which the electrical contact (50) or the connector element (60) is arranged, the side wall (71, 72) having an opening (73) which allows access to the removable electrical contact (50).

12. The wire groove rail system according to claim 11, It is characterized in that The opening (73) is designed such that only a portion of the electrical contact (50) is accessible and thus removable.

13. The line groove rail system according to any one of claims 10 to 12, It is characterized in that The two continuous linear groove rail elements (105) laterally surround the mechanical connection (70) in the mutually connected state, preventing access to the electrical contact (50).

14. The wire groove rail system according to any one of claims 8 to 13, It is characterized in that The wire groove rail profile is U-shaped or H-shaped with two side walls (102), on the inner side of each of which a busbar (110, 120) is arranged.

15. The line groove rail system according to any one of claims 8 to 14, It is characterized in that The line (111, 121) including the removable electrical contact (50) is used to provide a safety extra-low voltage or for communication purposes, in particular for communication according to the DALI standard.

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