FUSE SWITCH-DISCONNECTORS, ESPECIALLY NH FUSE SWITCH-DISCONNECTORS

Description

[0001] The present invention relates to a fuse switch disconnector, and in particular to a NH fuse switch disconnector (low-voltage high-performance fuse switch disconnector). Such fuse switch disconnectors are particularly suitable for connecting electrical devices and are used in particular for protection against overcurrents and short circuits.

[0002] Similar systems are known, for example, from EP 2 584 577 B1 or EP 3 016 122 A1. In particular, fuse switch disconnectors are known that comprise a base element and a cover element for opening or closing the fuse switch disconnector. Furthermore, DE 103 15 503 B3 describes an installation device for busbars that can be hooked onto busbars by means of hook parts and that has at least two locking elements with clamping shoulders for securing busbars of different widths.

[0003] Furthermore, DE 20 2020 105 647 U1 discloses a fuse switch disconnector comprising a base element and a cover element, further comprising a locking element for locking the cover element to the base element. The locking element is displaceable between two positions, wherein the cover element can be locked in the closed state when the locking element is in a first position, while the locking element can be moved to a second position when locking of the cover element is not desired. In this second position, the locking element does not protrude beyond the outer surface of the cover element, thus reducing the overall volume of the fuse switch disconnector.

[0004] It is an object of the present invention to further improve fuse switch disconnectors for attachment to busbars of different widths with regard to user-friendliness and taking into account the desired applications.

[0005] This object is achieved by a fuse switch disconnector according to claim 1. Claims 2 to 13 relate to particularly advantageous implementations of the fuse switch disconnector according to claim 1.

[0006] According to the invention, a fuse switch disconnector for attachment to busbars of one or more different widths comprises a base element, a cover element, a hook part, a latching device, and a first spring element. The latching device comprises a clamping section for clamping or clamping a busbar between the clamping section and the hook part, as well as a locking section for releasably locking the latching device to the base element in a locking position. The cover element is arranged to be movable back and forth relative to the base element between an open position and a closed operating position.The latching device is arranged to be movable back and forth relative to the base element between the locking position for arranging the fuse switch disconnector relative to a busbar so that the busbar can be positioned between the clamping section and the hook part, and one or more clamping positions for clamping or gripping the busbar between the clamping section and the hook part. The first spring element is designed to preload the latching device in each position towards the hook part. The fuse switch disconnector is designed such that locking of the latching device in the locking position is prevented and / or released when the cover element is in its closed operating position or is brought into the closed operating position.

[0007] The fuse switch disconnector can, in particular, be an NH fuse switch disconnector with NH fuse links (low-voltage high-performance fuse links). The NH fuse links can be inserted into the cover element and removed again. The fuse switch disconnector can be attached to busbars; in particular, several such fuse switch disconnectors can be attached side by side to the busbars. The fuse switch disconnector can be multi-pole, preferably 3-pole, and can be mounted on several, preferably three, busbars, each corresponding to a pole. The fuse switch disconnector can have several hook parts; in particular, a 3-pole fuse switch disconnector can have three hook parts, each for mounting on one of the three busbars.

[0008] When the fuse switch disconnector is in its operating state, the cover element is in the closed operating position. When the cover element is in its closed operating position, the fuse switch disconnector does not necessarily have to be in the operating state, but can also be in an isolated state, for example, with the NH fuse links removed from the cover element. The isolated state can be achieved, for example, by opening the cover element, removing the fuse links from the cover element, and then closing the cover element again. In the isolated state, maintenance work on the fuse switch disconnector, the busbar, or an electrical device connected to the fuse switch disconnector can be carried out without the power being applied.

[0009] The latching device comprises a clamping section for clamping or clamping a busbar between the clamping section and a hook part. In particular, the fuse switch disconnector can be attached or mounted to a busbar by clamping the busbar between the clamping section and the hook part. Furthermore, the latching device comprises a locking section for releasably locking the latching device to the base element in a locking position. That is, the locking section is configured to lock the latching device to the base element in the locking position and to release the locking of the latching device. The locking of the latching device can be released, for example, by a user contacting, touching, actuating, moving, and / or exerting a force on the locking section or a part of the locking section (e.g., a hook element or an inclined surface of a hook element).When the latching device is locked in the locking position, the fuse switch disconnector can be arranged or positioned relative to a busbar or hooked onto a busbar by means of the hook part, so that the busbar can be positioned between the clamping section and the hook part. In particular, when the latching device is arranged in the locking position, a distance between the clamping section and the hook part can be greater than a height of the busbar, so that the busbar can be positioned in a region between the clamping section and the hook part. Conversely, of course, when the latching device is arranged in the locking position, a busbar can be removed from the region between the clamping section and the hook part, so that the fuse switch disconnector can be released or removed from the busbar.

[0010] The latching device is arranged to be linearly displaceable relative to the base element between the locking position and one or more clamping positions. Alternatively, the latching device can also be fastened to the base element and arranged to be pivotable relative to the base element between the locking position and the clamping position about a latching device rotation axis. When the latching device is in a clamping position, a distance between the clamping portion of the latching device and a hook part can be smaller than when the latching device is arranged in the locking position, and this smaller distance can correspond to a height of a busbar to which the fuse switch disconnector can be attached.The plurality of clamping positions may further correspond to a plurality of widths of busbars to which the fuse switch disconnector may be attached, as described in more detail below in connection with the plurality of clamping steps.

[0011] The spring element is designed such that it preloads the locking device in the direction of the hook part in every position. For example, if the locking device is arranged in the locking position and the locking of the locking device is released in this position, the spring element can exert a first spring force on the locking device in order to move the locking device from the locking position into a clamping position. If the locking device is arranged in a clamping position and a busbar is positioned between the clamping section and the hook part, the spring element can exert a first spring force on the locking device in order to clamp the busbar between the clamping section and the hook part. The first spring element can be a spiral spring, for example. The first spring element can be formed integrally with the locking device or with a part of the locking device (e.g.with the clamping portion or a first or second locking element, as described below).

[0012] As mentioned above, the fuse switch disconnector is designed such that locking of the latching device in the locking position is prevented and / or released when the cover element is in its closed operating position or is brought into the closed operating position. In particular, the fuse switch disconnector can be designed such that locking of the latching device in the locking position is prevented when the cover element is in its closed operating position, and the fuse switch disconnector can further be designed such that locking of the latching device in the locking position is automatically released when the cover element is brought, e.g., from the open position, into the closed operating position. In particular, when the cover element is moved into the closed operating position, the cover element or a part of the cover element (e.g.,A cover side wall or a cover edge or a projection element in an interior region of the cover element or on an inner side of the cover side wall) can contact, touch, actuate, move, and / or exert a force on the locking portion or a part of the locking portion (e.g., the hook element or the inclined surface) so that the locking of the latching device is released. The latching device can then be moved to a clamping position by the first spring force of the first spring element in order to clamp a busbar between the clamping portion and the hook part and to fasten the fuse switch disconnector to the busbar.

[0013] The fuse switch disconnector according to the invention has the particular advantage that the locking device can be locked in the locking position by the locking section, so that the fuse switch disconnector can be arranged in a simple manner relative to a busbar, for example to position the busbar between the clamping section and the hook part. The locking of the locking device can then be released, for example by a user contacting or actuating the locking section. As a result, the locking device can be moved from the locking position to the clamping position by the first spring element and the busbar can be clamped between the clamping section and the hook part, so that the fuse switch disconnector is securely fastened to the busbar. In particular, the user therefore does not have to hold the locking device in the locking position with one hand and, for example,Instead of positioning the busbar between the clamping section and the hook part with the other hand, the user can first lock the latching device in the locking position and then, for example, attach the fuse switch disconnector to the busbar with just one hand. Thus, the fuse switch disconnector according to the invention is improved in terms of user-friendliness compared to conventional devices.

[0014] Furthermore, when the locking device is locked in the locking position, the user can easily and safely disconnect the fuse switch disconnector from the busbar by positioning the fuse switch disconnector relative to the busbar so that the busbar is no longer positioned between the clamping section and the hook element. In particular, the user does not have to simultaneously hold the locking device in the locking position with one hand and remove the busbar from the area between the clamping section and the hook element with the other hand, for example. Instead, they can first lock the locking device in the locking position and then, for example, with just one hand, remove the fuse switch disconnector from the busbar. This increases the user-friendliness of the fuse switch disconnector.

[0015] However, after positioning the fuse switch disconnector relative to the busbar so that the busbar is positioned between the clamping portion and the hook part, a user may forget to release the locking device and subsequently attempt to move the cover element from the open to the closed operating position to operate the fuse switch disconnector. However, it may be dangerous to operate the fuse switch disconnector if the fuse switch disconnector is not securely attached to the busbar. In particular, the fuse switch disconnector or an electrical device connected to the fuse switch disconnector may be damaged if the fuse switch disconnector becomes detached from the busbar during operation.To avoid this risk, the fuse switch disconnector according to the invention is designed such that locking of the latching device in the locking position is prevented and / or released when the cover element is in its closed operating position or the cover element is brought into the closed operating position. Thus, when the cover element is moved into the closed operating position, the locking of the latching device can be automatically released, even if the user has forgotten, for example, to manually release the locking device. This ensures that when the cover element is in the closed operating position, the fuse switch disconnector is always securely fastened to the busbar, even if a user has forgotten to release the locking of the latching device.This ensures safe operation of the fuse switch disconnector and improves the user-friendliness of the fuse switch disconnector.

[0016] In a preferred embodiment, the cover element is attached to the base element and arranged to pivot relative to the base element between the open position and the closed operating position about a cover rotation axis. This has the advantage that the cover element can be opened and closed particularly easily. Furthermore, precise positioning of the cover element relative to the base element is enabled during the closing process of the cover element, so that, in particular, the cover element can securely contact the locking section during the closing process in order to release the locking of the latching device.

[0017] According to the invention, the locking portion comprises a hook element. When the latching device is arranged in the locking position, the hook element is arranged to be movable back and forth relative to the base element between a hook element locking position for locking the latching device to the base element and a release position for releasing the locking. The hook element can in particular be a locking hook or a snap hook or a part thereof. This allows secure locking of the latching device in the locking position to be achieved by mechanically hooking the hook element to the base element. Furthermore, such a hook element can be produced easily and cost-effectively.

[0018] Furthermore, the locking portion can comprise a second spring element. When the latching device is arranged in the locking position and the hook element is arranged in the release position, the second spring element can exert a second spring force on the hook element to move the hook element from the release position to the hook element locking position. Preferably, the hook element and the second spring element are formed as one piece, and particularly preferably, the hook element and the second spring element form a latching hook or snap hook. The second spring element can be formed by a portion of the latching hook made of an elastic material. In this way, the locking portion enables secure locking of the latching device in the locking position and easy release of the locking, for example by exerting pressure on the hook element against the second spring force.Furthermore, such a locking section can be produced particularly easily and cost-effectively.

[0019] In a particular embodiment, the base element can comprise a base side wall that is delimited by a base edge in the direction of the cover element, e.g., in the direction of the positive z-axis. When the locking device is arranged in the locking position and the hook element is arranged in the hook element locking position, the hook element can rest at least partially on the base edge and be preloaded by the first spring element in the direction of the base edge, e.g., in the direction of the negative z-axis. As a result, the locking device can be securely locked to the base element in the locking position.

[0020] If, however, the latching device is arranged in a clamping position, the hook element or the locking section can be arranged in an inner region of the fuse switch disconnector delimited by the base side wall. In particular, the cover element can comprise a cover side wall which is delimited in the direction of the base element, i.e., in the direction of the negative z-axis, by a cover edge. If the cover element is arranged in the closed operating position, the cover edge can rest on the base edge. Thus, a compact and stable arrangement of the fuse switch disconnector can be achieved in the operating state of the fuse switch disconnector, and accidental actuation of the latching device in the operating state can be prevented.

[0021] According to the invention, the hook element comprises an inclined surface configured such that, when the lid element is brought into the closed operating position, the lid element or a part of the lid element (e.g., the lid side wall or the lid edge) contacts, touches, actuates, moves, and / or exerts a force on the inclined surface, such that the hook element is moved from the hook element locking position to the release position against the second spring force. In particular, when the lid element is arranged in a position close to the closed operating position, the lid element can already exert a force on the inclined surface, such that the hook element is moved from the hook element locking position to the release position against the second spring force.This allows the locking mechanism of the latching device to be released, and the latching device can be moved from the locking position to the clamping position using the first spring force. This has the advantage that the fuse switch disconnector is securely fastened to the busbar in the closed state, even if a user forgets to manually release the locking mechanism of the latching device before closing the cover element. This ensures safe operation of the fuse switch disconnector and further improves user-friendliness.

[0022] In a further preferred embodiment, the locking device comprises a guide section for guiding the locking device between the locking position and the one or more clamping positions. This allows the locking device to be guided particularly securely and precisely between the locking position and the one or more clamping positions, and damage to the locking device or the fuse switch disconnector can thus be prevented. The locking section can in particular be attached to the guide section and preferably be arranged at least partially in a first recess of the guide section. This achieves a particularly compact and space-saving configuration of the locking device.Furthermore, the guide section can have two parallel guide edges, wherein the guide section is preferably arranged at least partially in a guide shaft of the base element and is arranged to be linearly movable along the guide shaft. This enables particularly precise guidance of the locking device between the locking position and the one or more clamping positions, thereby further increasing user-friendliness. Furthermore, the guide section and the locking section can be formed as a single piece. Likewise, the clamping section and the guide section can be formed as a single piece. This enables a very compact and simple design of the locking element. Furthermore, this design reduces the number of necessary components and thus simplifies both the manufacture and assembly of the system.

[0023] In a particular embodiment, the guide section comprises a second recess or a groove for the engagement of a tool, e.g. a wrench, for manually moving the locking device relative to the base element against the first spring force of the first spring element. This allows the user to move the locking device against the first spring force, e.g. from a clamping position to the locking position, e.g. in order to release the fuse switch disconnector from the busbar. It is of course also possible that instead of the recess for the engagement of a tool, another element is provided, which can, for example, also be gripped by hand in order to move the element against the spring force of the first spring element or to release it from the busbar, wherein a handle can preferably be provided, for example.

[0024] In a further preferred embodiment, the clamping section comprises a plurality of clamping shoulders for clamping or clamping busbars of different widths between respective clamping shoulders and the hook part. Each of the plurality of clamping shoulders can correspond to one of the plurality of clamping positions, so that a busbar of a specific width can be clamped between the hook part and a corresponding clamping shoulder when the locking device is arranged in a corresponding clamping position. This allows for flexible use of the fuse switch disconnector depending on the desired application.

[0025] The clamping section preferably comprises a first locking element, a second locking element spaced apart from the first locking element, and a connecting element that connects the first locking element and the second locking element to one another. The connecting element can, in particular, have a rectangular, rounded-rectangular, oval, elongated, or cross-shaped cross-sectional area parallel to the two locking elements. The two locking elements, which can engage at different points on a busbar, allow the busbar to be clamped particularly securely between the clamping section and the hook part. The connecting element serves to fasten the two locking elements to one another, thus further increasing the stability of the locking device.

[0026] The first locking element and the second locking element can each comprise a plurality of clamping shoulders for clamping or clamping busbars of different widths, wherein the plurality of clamping shoulders of the first locking element are preferably designed in a stepped manner, and the plurality of clamping shoulders of the second locking element are designed in a stepped manner. A pair of a clamping shoulder of the first locking element and a clamping shoulder of the second locking element can correspond to one of the plurality of clamping positions, so that a busbar with a specific width can be clamped between the hook part and a corresponding pair of a clamping shoulder of the first locking element and a clamping shoulder of the second locking element when the locking device is arranged in a corresponding clamping position.Preferably, the first and second locking elements each comprise three, four, five, or more clamping shoulders for securing busbars of different widths. Thus, the fuse switch disconnector can be secured to a plurality of busbars of different widths by means of the two locking elements, thus enabling flexible use of the fuse switch disconnector depending on the desired application.

[0027] At least one locking element can be formed integrally with the first spring element, with the locking element preferably being a one-piece, integral plastic element with the first spring element, which is manufactured, for example, by injection molding. The one-piece, integral design of the locking element enables a very compact and simple design. Furthermore, the number of required components is reduced, thus simplifying both the production and assembly of the system.

[0028] Preferably, the guide section is formed integrally with the first locking element. In particular, the guide section can be formed perpendicular or substantially perpendicular to the first locking element. Particularly preferably, the guide section is a one-piece, integral plastic element with the first locking element, which is produced, for example, by injection molding. The one-piece, integral design of the guide element enables a very compact and simple construction. Furthermore, the number of required components is reduced, thus simplifying both the manufacture and assembly of the system.

[0029] Furthermore, in a preferred embodiment, the first locking element and the second locking element each comprise a groove for receiving a comb of the base element or a comb for engaging in a groove of the base element. Preferably, the groove or comb of each locking element is formed parallel to the guide edges of the guide section.

[0030] This allows the locking device to be guided particularly safely and precisely between the first and the clamping position, further increasing user-friendliness.

[0031] According to a further preferred aspect of the invention, the two locking elements are plate- or disc-shaped and arranged parallel to one another, wherein preferably the first locking element and the second locking element have an identical or substantially identical shape. As a result, the locking elements can be produced and installed in the fuse switch disconnector particularly cost-effectively and efficiently. Furthermore, the guide section can also be plate- or disc-shaped, wherein preferably a thickness of the guide section is equal to a thickness of the first locking element and / or the second locking element. This also contributes to cost-effective and efficient production of the locking device. Furthermore, at least one of the two locking elements and / or the guide section and / or the locking section can be a plastic element.This enables cost-effective and efficient production of the locking device, for example by an injection molding process.

[0032] These and other features and advantages of the invention will become apparent from the accompanying drawings, which show a particularly advantageous embodiment. They show: Fig. 1 is a perspective view of an embodiment of the fuse switch disconnector according to the invention, with the cover element in the open position; Fig. 2 is a perspective view of a locking device according to the invention; Fig. 3 is a further perspective view of the locking device according to the invention Fig. 2 ; Fig. 4 a perspective view of the base element and locking device, wherein the locking device is arranged in a clamping position relative to the base element; Fig. 5 a further perspective view of the base element and locking device in the same arrangement as in Fig. 4 ; Fig. 6 a section of the fuse switch disconnector, with the locking device arranged in the clamping position; Fig. 7 a similar section of the fuse switch disconnector as in Fig. 6 , however, the locking device being arranged in the locking position; Fig. 8 shows an enlarged section of the fuse switch disconnector, particularly showing the locking section of the locking device, the locking device being locked in the locking position by means of the locking section; Fig. 9 shows a further view of the fuse switch disconnector, the cover element being arranged between the open and the closed operating position, and the locking device being locked in the locking position; Fig. 10 shows a further view of the fuse switch disconnector, the cover element being arranged in the closed operating position.

[0033] Fig. 1 shows an embodiment of a fuse switch disconnector 1 according to the invention, wherein this fuse switch disconnector 1 is a 3-pole NH fuse switch disconnector 1 designed for a total of three fuse links. The fuse switch disconnector 1 comprises a base element 10 and a cover element 20 into which the three fuse links can be inserted. The fuse switch disconnector 1 is further designed such that it can be attached to a busbar system by means of hook parts 30. In the present 3-pole embodiment, the busbar system comprises a total of three busbars, each corresponding to a pole, and the fuse switch disconnector accordingly comprises three hook parts 30, each for attachment to one of the three busbars.The cover element 20 is attached to the base element 10 and is pivotable between an open and a closed operating position about a cover rotation axis R. In this illustration, the cover rotation axis R runs parallel to the y-axis. In . Fig. 1 the cover element 20 is in the open position. However, in an operating state of the fuse switch disconnector 1, the cover element 20 is always arranged in the closed operating position, so that the cover element 20 and the base element 10 form a closed interior area.

[0034] The fuse switch disconnector 1 comprises a locking device 40, which is inserted into the base element 10 or connected to the base element 10 in such a way that it is arranged to be movable relative to the base element 10 between a locking position and one or more clamping positions. Fig. 1 the latching device 40 is arranged in particular in the locking position. When the latching device 40 is in the locking position, the fuse switch disconnector 1 can be easily arranged relative to a busbar, such that the busbar can be positioned between a clamping section 410 of the latching device 40 and a hook part 30. In this embodiment, the latching device 40 is assigned to the hook part 30 that is furthest away from the cover rotation axis R among the three hook parts 30. The one or more clamping positions of the latching device 40 each serve to clamp a busbar positioned between the clamping section 410 and the hook part 30, as will be described in more detail below. In the embodiment shown here, the latching device 40 is arranged so as to be linearly displaceable between the locking position and the one or more clamping positions along the z-axis.This means that the locking position and the one or more clamping positions are all located on a line parallel to the z-axis. The locking position is arranged further in the direction of the positive z-axis than the one or more clamping positions, so that when the locking device 40 is arranged in the locking position, a distance between the locking device 40 and the hook part 30 is greater than when the locking device 40 is arranged in a clamping position. In an alternative embodiment, the locking device 40 can be arranged so as to be linearly displaceable at an angle to the z-axis between the locking position and the one or more clamping positions. In a further alternative embodiment, the locking device 40 can also be fastened to the base element 10 and arranged so as to be pivotable relative to the base element 10 between the locking position and the one or more clamping positions about a locking device rotation axis.

[0035] The locking device 40 is spring-loaded, in particular by means of a first spring element (not shown). The first spring element prestresses the locking device 40 in every position in the direction of the hook part 30, i.e., in the negative z-direction. In other words, the first spring element is designed such that it exerts a first spring force on the locking device 40 in the direction of the hook part 30 in every position. When the locking device 40 is arranged in the locking position and a locking of the locking device 40 in this position is released, the locking device 40 can be moved from the locking position to a clamping position by means of the first spring force. When the locking device 40 is arranged in a clamping position, a busbar can be clamped between the clamping section 410 and the hook part 30 by means of the first spring force in order to fasten the fuse switch disconnector 1 to the busbar.

[0036] Fig. 2 and Fig. 3 show various perspective views of an embodiment of the locking device 40. The locking device 40 comprises, in particular, a clamping section 410 for clamping or clamping a busbar between the clamping section 410 and a hook part 30 when the locking device 40 is in a clamping position, as well as a locking section 430 for releasably locking the locking device 40 to the base element in the locking position. Furthermore, the locking device 40 comprises a guide section 20 for guiding the locking device 40 between the locking position and the clamping position.

[0037] In this embodiment, the clamping section 410 comprises a first locking element 411, a second locking element 412, which is spaced apart from the first locking element 411, and a connecting element 413, which connects the first locking element 411 and the second locking element 412 to one another. The two locking elements 411, 412 are plate- or disc-shaped and have a substantially identical shape. Furthermore, the two locking elements 411, 412 are arranged parallel to one another. The two locking elements 411, 412 each have a plurality of clamping shoulders 4110a-e, 4120a-e for fastening busbars of different widths, wherein a clamping shoulder of the first locking element corresponds to a clamping shoulder of the second locking element.In the embodiment shown, the two locking elements 411, 412 each have five clamping shoulders 4110a-e, 4120a-e for fastening five busbars of different widths; however, the number of clamping shoulders can vary depending on the desired application. Furthermore, the plurality of clamping shoulders 4110a-e, 4120a-e of each locking element 411, 412 is stepped. In the embodiment shown, the vertical step edges run vertically, i.e., in the z-direction, while the horizontal step edges run exactly horizontally, i.e., in the x-direction, so that they form an interior angle of approximately 90°. Alternatively, the horizontal step edges can be slightly inclined relative to the x-direction, so that a vertical step edge and a horizontal step edge form an angle that is smaller than 90°, for example, 85°.Using the two locking elements 411, 412, the fuse switch disconnector 1 can be attached to a plurality of busbars of different widths. More specifically, a busbar with a specific width can be clamped between the hook part 30 and a corresponding pair of a clamping shoulder 4110a-e of the first locking element 411 and a clamping shoulder 4120a-e of the second locking element 412. The two parallel locking elements 411, 412, which engage at spaced-apart points on a busbar, allow the busbar to be clamped particularly securely between the clamping section 410 and a hook part 30.

[0038] In this embodiment, the connecting element 413 has a rounded-rectangular cross-sectional area parallel to the two locking elements. The connecting element serves in particular to fasten the two locking elements 411, 412 to one another, thus enabling a particularly stable fastening of busbars between the hook part 30 and the two locking elements 411, 412.

[0039] Furthermore, in this embodiment, the two locking elements 411, 412 each have a comb 4111, 4121 for engaging in a groove of the base element 10. Alternatively, the two locking elements 411, 412 can each have a groove for receiving a comb of the base element 10. The combs 4111, 4121 or the grooves of the two locking elements 411, 412 are each formed parallel to the guide edges 423, 424 of the guide element 420 and thus extend in the z-direction. This allows the locking device 40 to be guided securely and precisely between the first and the clamping position.

[0040] In this embodiment, the guide section 420 is plate-shaped and formed integrally with the first locking element 411. It extends along the z-axis and is formed substantially perpendicular to the first locking element 411. It has two parallel guide edges 423, 424 along the z-direction. The guide section 420 serves, in particular, to linearly guide the locking device 40 between the locking position and the clamping position. In particular, the guide section 420 can be arranged in a guide shaft 70 of the base element 10, which also extends along the z-direction, and can be linearly movable along the guide shaft 70.

[0041] The guide section 420 here has a first recess 421 in which the locking section 430 is arranged. The locking section 430 can be formed integrally with the guide section 420. The locking section 430 comprises a hook element 431 and a second spring element 432, which together form a latching hook or snap hook, wherein the second spring element 432 is formed by a portion of the latching hook made of elastic material. The locking section 430 serves in particular to lock the locking device 40 relative to the base element 10 in the locking position, as described in more detail below.

[0042] The guide section 420 further includes a second recess 422 into which a user can engage with a tool, e.g., a wrench, to manually move the locking device 40 relative to the base element 10 against the first spring force. This allows the user, for example, to move the locking device 40 from the clamping position to the locking position against the first spring force in order to remove the busbar from the area between the hook part 30 and the clamping section 410, thus releasing the fuse switch disconnector 1 from the busbar.

[0043] The two locking elements 411, 412 and / or the guide section 420 and / or the locking section 430 can each be made of plastic. In particular, the entire locking device 40 can be an integral plastic element, which is manufactured, for example, by injection molding.

[0044] Fig. 4 and 5each show the base element 10 with the locking device 40 in a clamping position. The base element 10 has a base side wall 100, which is delimited in the direction of the cover element 20, ie in the positive z-direction, by a base edge 101. If the locking device 40 is as in Fig. 4 and 5When the locking portion 430 is arranged in the clamping position, the locking portion 430, including the hook element 431, is located in an interior region of the fuse switch disconnector 1, which is delimited by the base side wall 100. In contrast, the second recess 422 of the guide portion 420 protrudes beyond the base side wall 100, so that a user can engage in the second recess 422 with a tool to move the locking device 40 from the clamping position to the locking position, even when the locking device 40 is in the clamping position. Furthermore, when the locking device 40 is in a clamping position, at least one clamping shoulder 4110a-e, 4120a-e of each locking element 411, 412 protrudes below a bottom surface of the base element 10 so that a busbar can be clamped between the respective clamping shoulders 4110a-e, 4120a-e and the hook part 30.

[0045] Fig. 6 and 7each show a section of the fuse switch disconnector 1, where in Fig. 6 the locking device 40 is arranged in a clamping position, while in Fig. 7 is arranged in the locking position. In Fig. 6 and 7 the base side wall 100 has been omitted in order to better identify components inside the fuse switch disconnector 1. In Fig. 6 The latching device 40 is arranged in the clamping position that is located furthest in the direction of the hook part 30, i.e., in the direction of the negative z-axis, among the plurality of clamping positions. When the latching device 40 is in this clamping position, a busbar with a smallest width among a plurality of busbars to which the fuse switch disconnector 1 can be attached can be clamped between the hook part 30 and the pair of clamping shoulders 4110a-e, 4120a-e of the first latching element 411 and the second latching element 412 that is located furthest in the direction of the positive z-axis and the positive x-axis among several pairs of clamping shoulders 4110a-e, 4120a-e. Fig. 7 However, none of the terminal shoulders 4110a-e, 4112a-e protrudes below the base surface of the fuse switch disconnector 1. If the locking device 40, as in Fig. 7 shown, is arranged in the locking position, a distance between the clamping section 410 and the hook part 30 is thus greater than when the locking device 40 is arranged in a clamping position. Furthermore, in Fig. 6 and Fig. 7 the guide shaft 70, in which the guide section 420 of the locking device 40 is arranged, can be seen. The two guide edges 423, 424 each rest against a corresponding inner edge of the guide shaft 70, so that the guide section 420 can be moved linearly along the guide shaft 70 in the z-direction in order to move the locking device 40 back and forth between the locking position and the one or more clamping positions.

[0046] Fig. 8 shows an enlarged section of the fuse switch disconnector 1 when the locking device 40 is arranged in the locking position and is locked in this position by means of the locking section 430 on the base element 20. The locking section 430 comprises, in particular, a hook element 431 and a second spring element 432. In this embodiment, the hook element 431 and the second spring element 432 are integrally formed as a locking hook, which is arranged and fastened in a recess of the guide section 420. The second spring element 432 corresponds to an elastic section of the locking hook.

[0047] If the locking device 40, as in Fig. 8 shown, is arranged in the locking position, the hook element 431 is arranged to be movable back and forth relative to the base element 10 between a hook element locking position for locking the locking device 40 in the locking position and a release position for releasing the locking of the locking device 40 (preferably linearly or substantially linearly along the y-direction, ie in particular perpendicular to the linear direction of movement of the locking device 40 between the locking position and the one or more clamping positions).When the latching device 40 is arranged in the locking position and the hook element 431 is arranged in the release position, the second spring element 432 exerts a second spring force on the hook element 431 (preferably along the y-direction or substantially along the y-direction) so that the hook element 431 is moved from the release position to the hook element locking position, unless an opposing external force acts on the hook element 431. In . Fig. 8 The hook element 431 is arranged in the hook element locking position. The hook element 431 rests on the base edge 101 and is biased toward the base side wall 100 by the first spring force. This locks the locking device 40 in the locking position.

[0048] If the locking device 40, as in Fig. 8 shown, is locked in the locking position by the locking section 430, the user can arrange the fuse switch disconnector 1 relative to a busbar in a safe and simple manner or can hook it onto a busbar by means of the hook part 30, so that the busbar is positioned between the clamping section 410 and the hook part 30. The user can then release the locking of the latching device 40 by moving the hook element 431 from the hook element locking position to the release position, e.g., by exerting an external force on the hook element 431 and pressing the hook element 431 into the interior of the fuse switch disconnector 1 against the second spring force. When the hook element 431 is arranged in the release position, the hook element 431 no longer rests on the base edge 101, and the locking of the latching device 40 is thus released.The latching device 40 is then moved from the locking position to a clamping position by the first spring force, and a busbar can be clamped between the clamping section 410 and the hook part 430 by the first spring force. Note that after the locking is released by the first spring force, the latching device is automatically moved to the clamping position that matches a busbar positioned between the clamping section 410 and the hook part 30, so that the busbar is reliably and securely clamped between the matching clamping shoulders 4110a-e, 4111a-e of the two latching elements 411, 412 and the hook part 30. The user therefore only needs to place the fuse switch disconnector 1 onto the busbar system and release the locking of the latching device 40, without having to first determine the width of the busbar.

[0049] When the locking device 40 is arranged in the clamping position, the locking section 430 is located inside the fuse switch disconnector 1. If the user wishes to release the fuse switch disconnector 1 from the busbar again, they can first move the locking device 40 manually or with the aid of a tool, which they insert, for example, into the second recess 421 of the guide section 420, from the clamping position to the locking position against the first spring force. When the locking device 40 is in the locking position, the locking section 430 then protrudes in the z-direction beyond the base edge 101 of the base side wall 100. Therefore, the hook element 431 is pressed by the spring force of the second spring element 432 along the y-direction into the outer region of the fuse switch disconnector 1 until the hook element 431 rests on the base edge 101 and the locking device 40 is locked in the locking position.The user can then easily and safely remove the fuse switch disconnector 1 from the busbar.

[0050] Fig. 9 shows a further perspective view of the fuse switch disconnector 1, wherein the locking device 40 is locked in the locking position by means of the locking section 430. As in Fig. 8 and Fig. 9 As can be seen, the hook element 431 comprises an inclined surface 4310 which points towards an outer region of the fuse switch disconnector (i.e., here in the positive y-direction) and the positive z-direction. When the latching device 40 is locked in the locking position and the cover element 20 is moved from the open position to the closed operating position, the cover element 20 exerts a force on the inclined surface 4310, so that the hook element 431 is moved counter to the second spring force from the hook element locking position to the release position, thus releasing the locking of the latching device 40.

[0051] More specifically, the lid element 20 comprises a lid side wall 200, which is delimited in the direction of the base element 10, i.e., in the direction of the negative z-axis, by a lid edge 201. When the latching device 40 is locked in the locked position by the locking portion 430 and the lid element 20 is moved from the open position to the closed operating position, the lid edge 201 contacts the inclined surface 4310 of the latching hook 431 when the lid element 20 is close to the closed operating position and exerts a force thereon, so that the hook element 631 is automatically pushed into the release position upon closing the lid element 20, thus releasing the locking of the latching device 40.The latching device 40 is then moved from the locking position to the clamping position by the first spring force, and the busbar is clamped between the clamping portion 410 and the hook part 430 by the first spring force. In this way, the fuse switch disconnector 1 is securely fastened to the busbar, even if the user has forgotten to release the locking of the latching device 40 before closing the cover element 20.

[0052] Fig. 10shows a view of the fuse switch disconnector 1 when the cover element is arranged in the closed operating position. In this state, the cover side wall 200 rests on the base side wall 100, and the base element 10 and the cover element 20 form a closed interior area, which in particular accommodates the latching device 40 and the first spring element, so that these parts of the fuse switch disconnector 1 are protected from damage by external influences. List of reference symbols

[0053] 1 Fuse switch disconnector 10 Base element 100 Base side wall 101 Base edge 20 Cover element 200 Cover side wall 201 Cover edge 30 Hook part 40 Latching device 410 Clamping section 411 First latching element 412 Second latching element 4110a-e, 412oa-e Clamping shoulder 4111, 4121 Groove 413 Connecting element 420 Guide section 421 First recess 422 Second recess 423, 424 Guide edge 430 Locking section 431 Hook element 4310 Inclined surface 432 Second spring element 70 Guide shaft R Cover rotation axis

Claims

1. A fuse load break switch (1) for fastening to busbars of one or more different widths, wherein the fuse load break switch (1) comprises a base element (10), a cover element (20), a hook part (30), a latching device (40) and a first spring element, wherein the latching device (40) comprises a clamping portion (410) for clamping or gripping a busbar between the clamping portion (410) and the hook part (30), and a locking portion (430) for detachably locking the latching device (40) on the base element (10) in a locking position, wherein the cover element (20) is arranged movably back and forth relative to the base element (10) between an open position and a closed operating position, wherein the latching device (40) is arranged movably back and forth relative to the base element (10) between the locking position, for arranging the fuse load break switch (1) relative to a busbar so that the busbar can be positioned between the clamping portion (410) and the hook part (30), and one or more clamping positions, for clamping or gripping the busbar between the clamping portion (410) and the hook part (30), wherein the first spring element is designed such that it preloads the latching device (40) in the direction of the hook part (30) in every position, characterised in that the fuse load break switch (1) is designed such that locking of the latching device (40) in the locking position is prevented and / or released when the cover element (20) is in its closed operating position or is brought into the closed operating position, wherein the locking portion (430) comprises a hook element (431), wherein, when the latching device (40) is in the locking position, the hook element (431) is arranged movably back and forth relative to the base element (10) between a hook element locking position for locking the latching device (40) on the base element (10) and a release position for releasing the locking, wherein the hook element (431) comprises an inclination face (4310), which is designed such that, when the cover element (20) is brought into the closed operating position, the cover element (20) contacts the inclination face (4310) and / or exerts a force on the inclination face (4310) so that the hook element (431) is moved from the hook element locking position to the release position counter to the second spring force.

2. The fuse load break switch (1) according to Claim 1, wherein the cover element (20) is fastened to the base element (10) and is arranged pivotably about a cover rotational axis (R) relative to the base element (10) between the open position and the closed operating position.

3. The fuse load break switch (1) according to Claim 1 or 2, wherein the locking portion (430) comprises a second spring element (432), wherein when the latching device (40) is in the locking position and the hook element (431) is in the release position, the second spring element (432) is designed such that it exerts a second spring force on the hook element (431) to move the hook element (431) from the release position to the hook element locking position, wherein preferably the hook element (431) and the second spring element (432) are designed as a single piece, wherein particularly preferably the hook element (431) and the second spring element (432) form a latching hook.

4. The fuse load break switch (1) according to Claims 1 to 3, wherein the base element (10) comprises a base side wall (100), which is delimited in the direction of the cover element (20) by a base edge (101), wherein, when the latching device (40) is in the locking position and the hook element (431) is in the hook element locking position, the hook element (431) rests at least partially on the base edge (101) and is preloaded in the direction of the base edge (101) by the first spring element.

5. The fuse load break switch (1) according to one of the preceding claims, wherein the latching device (40) comprises a guiding portion (420) for guiding the latching device (40) between the locking position and the one or more clamping positions.

6. The fuse load break switch (1) according to Claim 5, wherein the locking portion (430) is attached to the guiding portion (420), wherein preferably the locking portion (430) is arranged at least partially in a first recess (421) of the guiding portion (420).

7. The fuse load break switch (1) according to Claim 5 or 6, wherein the guiding portion (420) has two parallel guiding edges (423, 424), wherein preferably the guiding portion (420) is arranged at least partially in a guiding shaft (70) of the base element (10) and is arranged linearly movably along the guiding shaft (70), and / or wherein the guiding portion (420) and the locking portion (430) are designed as a single piece, wherein preferably the clamping portion (410) and the guiding portion (420) are designed as a single piece, and / or wherein the guiding portion (420) comprises a second recess (422) for the engagement of a tool for the manual movement of the latching device (40) relative to the base element (10) counter to a first spring force of the first spring element.

8. The fuse load break switch (1) according to one of the preceding claims, wherein the clamping portion (410) comprises a plurality of clamping shoulders (4110a-e, 4120a-e) for clamping or gripping busbars of different widths between respective clamping shoulders (4110a-e, 4120a-e) and the hook part (30).

9. The fuse load break switch (1) according to one of the preceding claims, wherein the clamping portion (410) comprises a first latching element (411), a second latching element (412), which is spaced from the first latching element (411), and a connecting element (413), which connects the first latching element (411) and the second latching element (412) to one another, wherein preferably the first latching element (411) and the second latching element (412) each comprise a plurality of clamping shoulders (4110a-e, 4120a-e) for clamping or gripping busbars of different widths, wherein particularly preferably the plurality of clamping shoulders (4110a-e) of the first latching element (411) and the plurality of clamping shoulders (4120a-e) of the second latching element (412) are each step-shaped.

10. The fuse load break switch (1) according to Claim 9, wherein the guiding portion (420) is designed as a single piece with the first latching element (411), wherein preferably the guiding portion (420) is formed perpendicularly or substantially perpendicularly to the first latching element (410).

11. The fuse load break switch (1) according to Claim 9 or 10, wherein the first latching element (411) and the second latching element (412) each comprise a groove (4111, 4121) for receiving a comb of the base element (10) or a comb for engagement in a groove of the base element (10), wherein preferably the groove (4112, 4122) or the comb of each latching element (411, 412) is formed parallel to the guiding edges (423, 424), and / or wherein the two latching elements (411, 412) are plate- or disc-shaped and are arranged parallel to one another, wherein preferably the first latching element (411) and the second latching element (412) have an identical shape.

12. The fuse load break switch (1) according to one of Claims 5 to 11, wherein the guiding portion (420) is plate- or disc-shaped, wherein preferably a thickness of the guiding portion (420) is equal to a thickness of the first latching element (411) and / or of the second latching element (412).

13. The fuse load break switch (1) according to one of the preceding claims, wherein the clamping portion (410) comprises a first latching element (411) and a second latching element (412), and / or the latching device (40) comprises a guiding portion (420), and wherein at least one of the two latching elements (411, 412) and / or the guiding portion (420) and / or the locking portion (430) is a plastic element.