Fuse-switch disconnectors, especially NH fuse-switch disconnectors

Description

[0001] The present invention relates to a fuse-switch disconnector, and in particular to an 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 especially 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, as disclosed, for example, in DE 20 2020 105 647 U1 or DE 197 07 606 A1. Further systems are known from EP 2 782 115 A1 and CH 696 789 A5.

[0003] It is an object of the present invention to further improve such a fuse-switch disconnector with regard to safety and user-friendliness, in particular taking into account the desired applications.

[0004] This problem is solved by a fuse-switch disconnector according to claim 1 and a fuse-switch disconnector according to claim 14. Claims 2 to 13 relate to particularly advantageous implementations of the fuse-switch disconnector according to claim 1. According to a first embodiment of the invention, the fuse-switch disconnector comprises a base element and a cover element, wherein 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 base element comprises a base side wall which is arranged parallel to an X-direction and a Z-direction of an XYZ coordinate system, wherein the Z-direction is perpendicular to the X-direction, and wherein the base side wall is bounded in the Z-direction by a base edge.The cover element comprises a cover side wall arranged parallel to the X and Z directions, with the cover side wall bounded in one direction opposite to the Z direction by a cover edge. The base side wall has one or more projecting sections extending in the Z direction relative to a straight section of the base edge, and the cover side wall has one or more recesses extending relative to a straight section of the cover edge. When the cover element is in the closed operating position, each projecting section of the one or more protruding sections engages positively in a corresponding recess of the one or more recesses, so that the cover edge rests on the base edge.

[0005] The Z-direction can also be referred to as a positive Z-direction, and the direction opposite to the Z-direction can also be referred to as an opposite Z-direction or a negative Z-direction.

[0006] 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 and removed from the cover element. The fuse-switch disconnector can be mounted on busbars; in particular, several such fuse-switch disconnectors can be mounted side by side on the busbars. The fuse-switch disconnector can be multi-pole. Preferably, the NH fuse-switch disconnector can be 3-pole and designed for a total of three fuse links. The base element can comprise two receiving units for each of the three fuse links for clamping and contacting one contact blade of the respective fuse link, i.e., a total of six receiving units for a total of six contact blades.A 3-pole fuse switch disconnector can be mounted, in particular, on three busbars, each corresponding to one pole.

[0007] The cover element is positioned in the closed operating position when the fuse-switch disconnector is in its operating state. However, when the cover element is in the closed operating position, the fuse-switch disconnector is not necessarily in its operating state. It can also be, for example, in a disconnected state, in which the NH fuse links have been removed from the cover element. The disconnected state can be achieved, for example, by opening the cover element, removing the fuse links, and then closing the cover element again. In the disconnected state, maintenance work on the fuse-switch disconnector, the busbar, or any electrical device connected to the fuse-switch disconnector can be carried out without de-energizing the circuit.

[0008] As previously mentioned, the base side wall has one or more projecting sections extending in the Z-direction, and the cover side wall has one or more recesses. Specifically, each projecting section of the base side wall can be bounded by a corresponding section of the base edge, and each recess of the cover side wall can be bounded by a corresponding section of the cover edge. When the cover element is in the closed operating position, each projecting section engages positively in a corresponding recess, such that at least the corresponding section of the cover edge rests on the corresponding section of the base edge, or the entire cover edge rests on the entire base edge.Thus, when the cover element is arranged in the closed operating position, the base side wall and the cover side wall can rest positively on each other and together form a side wall of the fuse load break switch, in particular a side wall with a uniform wall thickness.

[0009] Note that, as an alternative to the embodiment described above, the roles of the cover element and the base element can be reversed. That is, in a second embodiment of the invention, the fuse-switch disconnector comprises a base element and a cover element, wherein 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 base element comprises a base side wall arranged parallel to an X-direction and a Z-direction of an XYZ coordinate system, the Z-direction being perpendicular to the X-direction, and the base side wall being bounded in the Z-direction by a base edge. The cover element comprises a cover side wall arranged parallel to the X-direction and the Z-direction, the cover side wall being bounded in a direction opposite to the Z-direction by a cover edge.The cover side wall has one or more projecting sections extending in the opposite Z-direction relative to a straight section of the cover edge, and the base side wall has one or more recesses extending relative to a straight section of the base edge. When the cover element is in the closed operating position, each projecting section of the one or more protruding sections engages positively in a corresponding recess of the one or more recesses, so that the cover edge rests on the base edge.

[0010] In a third embodiment, the base side wall has one or more base projection sections projecting in the Z direction and one or more base recesses, and the cover side wall has one or more cover projection sections projecting in the opposite Z direction and one or more cover recesses. When the cover element is in the closed operating position, each base projection section engages in a corresponding cover recess and each cover projection section engages in a corresponding base recess in a form-fitting manner, so that the cover edge rests on the base edge.

[0011] For the sake of simplicity, the following description of the further features of the invention refers only to the first embodiment. However, all features of the first embodiment, in particular the special features of the projecting sections and the recesses, can be implemented analogously in the second and third embodiments.

[0012] In an operating state of the fuse-switch disconnector, the cover element is initially in the closed operating position. If a user moves the cover element from the closed operating position to the open position, an electrical connection, for example between the contact blades of fuse links inserted into the cover element and the receiver units attached to the base element, can be broken. This interrupts the operating state and interrupts the electrical current or voltage inside the fuse-switch disconnector. However, the current or voltage is only interrupted when the cover element is sufficiently far from the closed operating position so that the contact between the contact blades and the receiver units is broken.If, however, the cover element is still close to the closed operating position, contact between the contact blades and the receiving units can persist. Therefore, even if the fuse-switch disconnector has already been partially opened, current or voltage may still be present inside. With conventional fuse-switch disconnectors, this can pose a danger to a user who initially opens the switch partially and then inadvertently inserts their hand or fingers into an opening between the base element and the cover element while current or voltage is still present inside. In particular, this can result in the user receiving an electric shock, endangering their health.

[0013] The problem described above is solved by the fuse-switch disconnector according to the invention. In the closed operating position, each projecting section of the base element engages positively, i.e., completely, in a corresponding recess of the cover element. When the cover element is moved from the closed operating position a short distance towards the open position, each projecting section still partially engages in a corresponding recess, so that there is an overlap area in the Z-direction between the base side wall and the cover side wall. In this position of the cover element, the opening area between the cover side wall and the base side wall does not extend over the entire width of the fuse-switch disconnector in the X-direction, but is interrupted by the one or more projecting sections.This limits the width of the opening between the cover side wall and the base side wall in the X-direction. This makes it more difficult or even impossible for a user opening the fuse-switch disconnector to reach inside with their hand or fingers through the opening while current or voltage is still present. This increases the safety and ease of use of this fuse-switch disconnector compared to conventional fuse-switch disconnectors.

[0014] According to an independently inventive aspect, the cover element is attached to the base element and pivotably arranged relative to the base element between the open position and the closed operating position about a cover rotation axis, wherein the cover rotation axis is perpendicular to the X-direction and perpendicular to the Z-direction. In other words, the cover rotation axis runs parallel to a Y-direction that is perpendicular to the X-direction and perpendicular to the Z-direction. This aspect has the advantage that the cover element can be opened and closed in a particularly simple manner and allows for precise positioning of the cover element relative to the base element during the closing process, thus reducing the risk of damage to the cover element and the base element, in particular to one or more projecting sections.

[0015] In a preferred embodiment of the fuse-switch disconnector, each projection section of the one or more projection sections has a width in the X-direction that decreases along the Z-direction. This has the advantage that the cover element can be opened and closed more easily, thereby reducing the risk of damage to the cover element and the base element, in particular to the one or more projection sections.

[0016] In particular, each protruding section can have a convex shape. This also has the advantage that the lid element can be opened and closed more easily, thereby reducing the risk of damage to the lid element and the base element, especially to one or more protruding sections. Furthermore, the convex protruding section is easier and more cost-effective to produce.

[0017] The cover element and / or the base element, in particular the cover side wall and / or the base side wall, can each be made of plastic, e.g., by an injection molding process, which is particularly efficient and cost-effective. This ensures high stability of the corresponding components of the fuse-switch disconnector.

[0018] Each projection section can be rectangular, trapezoidal, or triangular. Each of these shapes offers the advantage of exceptional stability and simple, cost-effective manufacturing. Furthermore, each projection section can have rounded corners, further reducing the risk of damage, particularly breakage of the corners, when opening and closing the lid. Alternatively, each projection section can be bell-shaped or conical. This also offers the advantage of exceptional stability and simple, cost-effective manufacturing.

[0019] In a preferred embodiment, the base side wall has a plurality of projecting sections arranged at regular or substantially regular intervals along the X-direction. That is, the distances between any two adjacent projecting sections 131 can be equal or substantially equal. In this case, the cover side wall can also have a plurality of recesses arranged at regular or substantially regular intervals along the X-direction. When the cover element is in the closed operating position, each projecting section of the plurality of projecting sections engages positively in a corresponding recess of the plurality of recesses, so that the cover edge rests on the base edge.This has the following advantage: When the cover element is moved from the closed operating position a short distance towards the open position, each protruding section of the plurality of protruding sections partially engages a corresponding recess of the plurality of recesses, creating an overlap area in the Z-direction between the base side wall and the cover side wall. In this position of the cover element, the opening area between the cover side wall and the base side wall does not extend across the entire width of the fuse-switch disconnector in the X-direction, but is interrupted by the plurality of protruding sections. Thus, the width of the opening area between the cover side wall and the base side wall in the X-direction is limited by the plurality of protruding sections, thereby making it more difficult or...prevents a user opening the fuse switch disconnector from reaching through the opening area into the interior of the fuse switch disconnector with their hand or fingers while current or voltage is still present inside.

[0020] Preferably, the majority of the projecting sections have an identical or substantially identical shape or contour. This has the advantage that the majority of projecting sections can be produced in a simple and cost-effective manner. The base side wall can have two, three, four, five, or more projecting sections. In these cases, the cover side wall can also have two, three, four, five, or more corresponding recesses, so that each projecting section engages in a corresponding recess when the cover element is in the closed operating position. The higher the number of projecting sections, the smaller the widths of the respective projecting sections and / or the smaller the distances between adjacent projecting sections.Thus, the width of an opening area between the cover side wall and the base side wall in the X direction can be particularly effectively limited by the majority of protruding sections, thereby further increasing the safety and user-friendliness of the fuse-switch disconnector.

[0021] In a preferred embodiment, the base side wall has a plurality of projecting sections, wherein the plurality of projecting sections are bounded by a wave-shaped or sinusoidal section of the base edge. This enables high stability and particularly cost-effective production of the projecting sections.

[0022] According to an independently inventive aspect, the one or more projecting sections are each bounded by a section of the base edge provided with a stepped fold, and the one or more recesses are each bounded by a section of the cover edge provided with an opposite stepped fold, so that the stepped fold of each projecting section rests against the opposite stepped fold of the corresponding recess when the cover element is in the closed operating position. This has the advantage that, in the operating state of the fuse-switch disconnector, a tight seal is achieved between the base element and the cover element, so that, for example, no liquid can penetrate between the cover element and the base element into the interior of the fuse-switch disconnector. Thus, damage to the fuse-switch disconnector can be prevented.

[0023] In a preferred embodiment, each projecting section has a maximum height in the Z-direction that is greater than or equal to half the maximum width in the X-direction of the projecting section, wherein the maximum height is particularly preferably greater than or equal to the maximum width. The maximum height of a projecting section can be the maximum amount by which the projecting section projects in the Z-direction. This embodiment has the advantage that the width of an opening area in the X-direction between the cover side wall and the base side wall is effectively reduced, as further described below, particularly in connection with Fig. 7 , will be explained in more detail.

[0024] Alternatively or additionally, each projection section can have a maximum height in the Z-direction that is greater than or equal to half the maximum distance in the X-direction between two adjacent projection sections, with the maximum height being particularly preferably greater than or equal to the maximum distance. This also has the advantage of reducing the width of an opening area in the X-direction between the cover side wall and the base side wall. This further increases the safety and ease of use of the fuse-switch disconnector.

[0025] Furthermore, each projecting section can have a maximum height in the Z-direction that is greater than or equal to one-third, preferably one-half or two-thirds, of the maximum height of the cover side wall. This achieves a large overlap area in the Z-direction between the base side wall and the cover side wall, which still exists even when the cover element has been moved a certain distance from the closed operating position towards the open position. This further improves protection against user interference with the interior of the fuse-switch disconnector, even when the cover element has already been moved a certain distance towards the open position.

[0026] In a further preferred embodiment, the one or more projecting sections are arranged, designed, and / or dimensioned such that they at least partially cover a contact area between a receiving unit of the base element and a contact blade of a fuse link inserted into the cover element. This prevents the user from accidentally touching a live contact area, even if their hand inadvertently enters the interior of the fuse-switch disconnector. This further increases the safety and user-friendliness of the fuse-switch disconnector.

[0027] These and other features and advantages of the invention will become clear with reference to the accompanying drawings, which show particularly advantageous embodiments. They show: Fig. 1 a perspective view of a first embodiment of the fuse-switch disconnector according to the invention, wherein the cover element is in the open position; Fig. 2 a perspective view of the fuse-switch disconnector from Fig. 1 , in which a side surface pointing in the Y direction can be seen, with the cover element in the closed operating position; Fig. 3 a perspective view of the fuse-switch disconnector from Fig. 1 , in which the side surface pointing in the Y direction can be seen, with the cover element located between the open and closed operating positions; Fig. 4 a perspective view of the fuse-switch disconnector from Fig. 1 , in which a side surface pointing in the opposite Y direction can be seen, with the cover element in the closed operating position; Fig. 5 a perspective view of the fuse-switch disconnector from Fig. 1 , in which a side surface pointing in the opposite Y direction can be seen, with the cover element located between the open and closed operating positions; Fig. 6 another perspective view of the fuse-switch disconnector from Fig. 1 , in which the cover element was moved a short distance from the closed operating position towards the open position, so that a projecting section of the base element still partially engages in a recess of the cover element, so that an overlap area exists in the Z direction between the base side wall and the cover side wall; Fig. 7 a schematic representation of a section of a base side wall and a cover side wall of a fuse load break switch according to the invention, wherein each projecting section of the base side wall partially engages in a corresponding recess of the cover side wall, so that an overlap area exists in the Z direction between the base side wall and the cover side wall; Fig. 8a a schematic representation of a base side wall and a cover side wall of the fuse load disconnect switch of the first embodiment; Fig. 8b a schematic representation of a base side wall and a cover side wall of the fuse-switch disconnector of the second embodiment; and Fig. 8c A schematic representation of a base side wall and cover side wall of the fuse load disconnect switch of the third embodiment.

[0028] Fig. 1 Figure 1 shows a first 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. Furthermore, the fuse switch disconnector 1 comprises two receiving units for each of the three fuse links for clamping and contacting a contact blade 90 of the respective fuse link, i.e., a total of six receiving units according to the invention for a total of six contact blades 90. The fuse switch disconnector 1 is designed such that it can be attached to a busbar system by means of hook parts 30, which in the 3-pole version comprises a total of three busbars.

[0029] The cover element 20 is arranged to be movable back and forth relative to the base element 10 between an open position and a closed operating position, wherein the cover element 20 is arranged in the closed operating position in an operating state of the fuse-switch disconnector 1. In this embodiment, the cover element 20 is attached to the base element 10 and is arranged to pivot relative to the base element 10 between the open position and the closed operating position about a cover rotation axis R, which runs parallel to a Y-direction. Fig. 1 shows the lid element in the open position, Fig. 2 and Fig. 4 Each shows the lid element in the closed operating position, and Fig. 3 , Fig. 5 and Fig. 6 Each image shows the lid element in a position between the open position and the closed operating position.

[0030] In this embodiment, the base element 10 comprises a first base side wall 100, which is arranged parallel to an X-direction and a Z-direction and points in a direction opposite to the Y-direction (negative Y-direction). That is, the first base side wall 100 limits the fuse-switch disconnector 1 in the negative Y-direction. The first base side wall 100 corresponds to the view from Fig. 1 the front, unobstructed base side wall. The X, Y, and Z directions are each perpendicular to one another. The first base side wall 100 is bounded in the Z direction by a first base edge 101. The cover element 20 comprises a first cover side wall 200, which is arranged parallel to the X and Z directions and points in the negative Y direction. The first cover side wall 200 is bounded in a direction opposite to the Z direction by a first cover edge 201. In this embodiment, the first base side wall 100 comprises five first projecting sections 131 extending in the Z direction, and the first cover side wall 200 comprises five first recesses. When the cover element is arranged in the closed operating position, each first projecting section 131 engages positively in a corresponding first recess 231, so that the first cover edge 201 rests on the first base edge 101, as shown in Fig. 4 The first projecting sections 131 can each be arranged, designed and dimensioned in such a way that they at least partially conceal a contact area between a receiving unit of the base element 10 and a contact blade 90 of a safety insert placed in the cover element 20.

[0031] Furthermore, the fuse-switch disconnector includes 1 from Fig. 1 a second base sidewall 100 with a second projecting section 131, wherein the second base sidewall 100 points in the positive Y direction and is opposite the first base sidewall 100. In Fig. 1 The second base side wall 100 is partially concealed and therefore not visible except for the second projecting section 131 of the second base side wall 100. In this embodiment, the second projecting section 131 has a trapezoidal shape. Furthermore, the fuse-switch disconnector 1 comprises a second cover side wall 200 with a second recess 231, wherein the second cover side wall 100 also points in the positive Y direction and is opposite the first cover side wall 200, so that it Fig. 1 is not recognizable. When the cover element 20 is arranged in the closed operating position, the second projecting section 131 engages positively in the second recess 231, as shown in Fig. 2 The second projection section 131 can be arranged, designed and dimensioned such that it at least partially conceals a contact area between a receiving unit of the base element 10 and a contact blade 90 of a safety insert inserted into the cover element 20.

[0032] It should be noted, however, that a fuse-switch disconnector according to the invention does not necessarily have to comprise a first and a second base side wall and a first and a second cover side wall, as described above. A fuse-switch disconnector according to the invention can also, for example, comprise only one base side wall with one or more projecting elements and only one cover side wall with one or more recesses, while the opposite base side wall comprises neither a projecting element nor a recess, and the opposite cover side wall comprises neither a projecting element nor a recess. The first and second base side walls of the embodiment are described below. Fig. 1 Each is simply referred to as a "base side wall" when it is not necessary to distinguish between the first and second base side walls. Similarly, the first and second cover side walls of the embodiment are made of Fig. 1 Each is simply referred to as "lid side wall" when it is not necessary to distinguish between the first and second lid side wall.

[0033] Fig. 2 and Fig. 3 Each shows a perspective view of the fuse-switch disconnector. Fig. 1 , in which the second base side wall 100 and the second lid side wall 200 can be seen. In Fig. 2 The cover element 20 is in the closed operating position while it is in Fig. 3 The device is located in a position between the open and closed operating positions. The base side wall 100 is bounded in the Z-direction (positive Z-direction) by the base edge 101. The cover side wall 200 is bounded in the opposite Z-direction (negative Z-direction) by the cover edge 201. The base side wall 100 has the projecting section 131, which projects in the positive Z-direction, and the cover side wall 200 has the corresponding recess 231. In this embodiment, the projecting section 131 has a width in the X-direction that decreases along the Z-direction, and the projecting section has a convex shape, more precisely a trapezoidal shape. The corners of the projecting section 131 are also slightly rounded. Such a projecting section is particularly lightweight and inexpensive to produce and exhibits high stability.

[0034] If the lid element 20, as in Fig. 2 As shown, when in the closed operating position, the projecting section 131 engages positively, i.e., completely, in the recess 231, so that the cover edge 201 rests on the base edge 101. Thus, the cover side wall 100 and the base side wall 200 rest positively against each other and form a continuous side wall of the fuse-switch disconnector 1, preferably with a uniform wall thickness. Furthermore, in Fig. 2 It has been shown that the projecting section 131 has a maximum height hmax in the Z-direction, which is greater than or equal to one-third, preferably one-half or two-thirds, of the maximum height hD of the cover side wall. The maximum height hmax of the projecting section 131 is the maximum amount by which the projecting section 131 projects in the Z-direction. The maximum height hmax of the projecting element 131 particularly determines a maximum overlap area Ü in the Z-direction between the base side wall 100 and the cover side wall 200: When the cover element is in the closed operating position, as shown in Fig. 2 As shown, the height of the overlap area Ü in the Z-direction between the cover side wall 200 and the base side wall 100 is exactly h max. When the cover element is in the open position, as shown in Fig. 3 As shown, there is no overlap area Ü between the cover side wall 200 and the base side wall 100. If the cover element 20 is moved only a short distance from the closed operating position towards the open position, as e.g. in Fig. 6 As shown, the height of the overlap area Ü lies between zero and h max. Because the projection section 131 has a maximum height h max in the Z-direction that is greater than or equal to one-third, preferably one-half or two-thirds, of the maximum height h D of the cover side wall, it is ensured that there is a sufficiently large overlap area Ü in the Z-direction between the cover side wall 200 and the base side wall 100, even if the cover element 20 has been moved a certain distance from the closed operating position towards the open position. The overlap area Ü is further described below, particularly in connection with Fig. 7 , described in even more detail.

[0035] Fig. 4 and Fig. 5 Each shows a perspective view of the fuse-switch disconnector. Fig. 1 , in which the first base side wall 100 and the first lid side wall 200 can be seen. In Fig. 4 The cover element 20 is in the closed operating position while it is in Fig. 5 in a position between the open and closed operating positions. In this embodiment, the base side wall 100 comprises five projecting sections 131, and the cover side wall 200 comprises five recesses 231. When the cover element 20 is in a position between the open and closed operating positions, as shown in Fig. 4 As shown, in the closed operating position, each projecting section 131 engages positively in a corresponding recess 231, so that the lid edge 201 rests on the base edge 101. In this embodiment, the five projecting sections 131 are arranged at regular intervals along the base side wall 100. Furthermore, the five projecting sections 131 have a substantially identical shape or contour. In particular, each projecting section 131 has a width in the X direction that decreases along the Z direction. Furthermore, each projecting section 131 has a convex shape. More precisely, in this embodiment, each of the projecting sections 131 has a conical shape. The five projecting sections 131 are also bounded by a wave-shaped or sinusoidal section of the base edge 101.Further sections of the base side wall 101, which may be arranged relative to the projection sections 131 in the positive X direction and / or in the negative X direction, may each be bounded by a straight section of the base edge 101, as shown in . Fig. 4 and Fig. 5 The five recesses 231 of the lid side wall are also bounded by a wave-shaped or sinusoidal section of the lid edge 201. Further sections of the lid side wall 201, which may be arranged relative to the recesses 231 in the positive X-direction and / or in the negative X-direction, may each be bounded by a straight section of the lid edge 201, as shown in Fig. 4 and Fig. 5 as can be seen. In this embodiment, when the cover element 20 is in the closed operating position, the cover edge 201 rests completely on the base edge 101, so that the fuse-switch disconnector is securely closed.

[0036] Fig. 6 shows another perspective view of the fuse-switch disconnector. Fig. 1 , wherein the cover element was moved a short distance from the closed operating position towards the open position. In this view, it can be seen that the projecting section 131 is bounded by a section of the base edge 101 provided with a stepped rebate 133, and the recess 231 is bounded by a section of the cover edge 201 provided with an opposite stepped rebate 233. When the cover element 20 is in the closed operating position, the stepped rebate 133 of the projecting section 131 rests against the opposite stepped rebate 233 of the recess 231, thus creating a particularly tight seal of the fuse-switch disconnector. Furthermore, in Fig. 6 It can be seen that when the cover element 20 is moved a short distance from the closed operating position towards the open position, the opening area between the cover side wall 200 and the base side wall 100 does not extend across the entire width of the fuse-switch disconnector 1 in the X-direction, but rather is interrupted by the projecting section 131. This makes it difficult or impossible for a user who has partially opened the fuse-switch disconnector 1 to reach through the opening area into the interior of the fuse-switch disconnector 1 with their hand or fingers while an electrical current or voltage is still present inside.

[0037] Fig. 7 schematically shows a section of the base side wall 100 and the cover side wall 200 of the fuse-switch disconnector 1. Fig. 1 , wherein the cover element 20 was moved a short distance from the closed operating position towards the open position. In this arrangement of the cover element 20, each projecting section 131 of the base side wall 100 partially engages a corresponding recess 231 of the cover side wall 200, so that there is an overlap area Ü in the Z-direction between the base side wall 100 and the cover side wall 200. Note that the illustration from Fig. 7 schematic is particularly because in Fig. 7 the lid side wall 200 is displaced relative to the base side wall 100 in the Z-direction, whereas in the embodiment from Fig. 1 The cover element 20 is arranged to pivot about a rotational axis R relative to the base element 10. The illustration from Fig. 7 is particularly helpful for understanding the invention; however, the effects and advantages described below apply analogously to the case in which, for example, the cover element 20 is arranged to pivot about the axis of rotation R relative to the base element 10.

[0038] In Fig. 7 The base side wall 100 comprises five projecting sections 131 and the cover side wall 200 comprises five corresponding recesses 231, as in the case of the first base side wall 100 and first cover side wall 200 described above. Fig. 7 Furthermore, the cover side wall 200 is spaced from the base side wall 100 by an amount v in the Z-direction. Therefore, there is an opening area between the base side wall 100 and the cover side wall 200, with a height of v in the Z-direction. If, as in conventional fuse-switch disconnectors, the base side wall 100 had no projections or recesses and was bounded by a completely straight base edge 101, and likewise the cover side wall 200 had no projections or recesses and was bounded by a completely straight base edge 101, then the opening area would extend along the entire width of the fuse-switch disconnector in the X-direction between the base side wall 100 and the cover side wall 200.However, in the fuse-switch disconnector 1 according to the invention, the opening area between the base side wall 100 and the cover side wall 200 in the X direction is limited by the projecting sections 131, as described in more detail below.

[0039] In Fig. 7 A projecting section 131 has a maximum height hmax in the Z-direction and a maximum width bmax in the X-direction. Since the projecting section 131 engages positively in a corresponding recess 231 in the closed operating state, the corresponding recess 231 also has a maximum height hmax in the Z-direction and a maximum width bmax in the X-direction. Furthermore, the base side wall 100 and the cover side wall 200 have an overlap area Ü in the Z-direction, which is determined by the distance v between the base side wall 100 and the cover side wall 200 and the maximum height hmax of the projecting element 131. More precisely, the height in the Z-direction of the overlap area Ü is equal to the difference between the maximum height hmax of the projecting element 131 and the distance v between the base side wall 100 and the cover side wall 200.In the closed operating state, v is in particular equal to zero and thus the height of the overlap area Ü is equal to the maximum height h max of the projection element 131. As long as the distance v between the base side wall 100 and the cover side wall 200 is less than the maximum height h max of the projection element 131, an overlap area Ü exists between the base side wall 100 and the cover side wall 200.

[0040] In Fig. 7 A width in the X-direction of an opening area between the base side wall 100 and the cover side wall 200 within the overlap area Ü is designated a1, and a width in the X-direction of the opening area outside the overlap area Ü is designated a2. The width a2 is less than or equal to the maximum width bmax of the recess 231, which is equal to the maximum width bmax of the projection element 131. Thus, outside the overlap area Ü: a 2 ≤ b max .

[0041] The width a1 is less than or equal to half the maximum width bmax, since the width a1 occurs on both sides of the projection section 131 within the recess 231. Therefore, within the overlap area Ü: a 1 ≤ 0.5 b max .

[0042] Thus, the opening area between the cover side wall 200 and the base side wall 100 in the X-direction does not extend across the entire width of the fuse-switch disconnector 1, but is limited by a1 and a2, respectively. This prevents the user from reaching into the interior of the fuse-switch disconnector 1 with their hand or fingers through the opening area between the cover side wall 200 and the base side wall 100, thereby further increasing the safety and ease of use of the fuse-switch disconnector.

[0043] In a preferred embodiment, each projection section 131 has a maximum height h max in the Z-direction which is greater than or equal to half of a maximum width b max in the X-direction of the projection section 131, i.e., 0.5 b max ≤ h max .

[0044] Using the above relation (2), we thus obtain within the overlap area Ü: a 1 ≤ h max .

[0045] Thus, in this preferred embodiment, the width a 1 of the opening area in the X-direction within the overlap area Ü is less than or equal to the maximum height h max of the projection element 131 or the recess 231. This effectively limits the width of the opening area between the cover side wall 200 and the base side wall 100 in the X-direction. This further increases the safety and ease of use of the fuse-switch disconnector.

[0046] In a particularly preferred embodiment, each projection section 131 has a maximum height h max in the Z-direction which is greater than or equal to the maximum width b max in the X-direction of the projection section 131, i.e., the following holds: b max ≤ h max

[0047] Using the above relation (1), we thus obtain outside the overlap area Ü: a 2 ≤ h max , and using the above relation (2) we obtain within the overlap area Ü: a 1 ≤ 0.5 h max < h max .

[0048] Thus, in this particularly preferred embodiment, both the width a 2 of the opening area in the X-direction outside the overlap area Ü and the width a 1 of the opening area in the X-direction within the overlap area Ü are less than or equal to the maximum height h max of the projection element 131 or the recess 231, respectively. This effectively limits the width in the X-direction of the opening area between the cover side wall 200 and the base side wall 100. This further increases the safety and user-friendliness of the fuse-switch disconnector.

[0049] In Fig. 7 Furthermore, d max denotes a maximum distance in the X-direction between two adjacent projection sections 131. In a preferred embodiment, each projection section 131 has a maximum height h max in the Z-direction, which is greater than or equal to half the maximum distance d max in the X-direction between two adjacent projection sections 131, i.e., 0.5 d max ≤ h max .

[0050] The maximum height h max is particularly preferred if it is greater than or equal to the maximum distance d max, i.e., the following applies: d max ≤ h max .

[0051] Relations (8) and (9) are analogous to relations (3) and (5) above. Relations (8) and (9) also produce the same technical effects as relations (3) and (5), for the following reasons: As in Fig. 7 As can be seen, an area between two adjacent projecting sections 131 of the base side wall 100 can also be interpreted as a recess in the base side wall 100, and a section of the cover side wall 200 between two adjacent recesses 231, each corresponding to the two adjacent projecting elements 131 of the base side wall 100, can also be interpreted as a projecting element of the cover side wall 200 that corresponds to the recess of the base side wall 100. The maximum distance dmax between the two adjacent projecting sections 131 of the base side wall 100 is simultaneously the maximum width of the recess in the base side wall 100 between the two adjacent projecting sections 131, and this is equal to the maximum width of the projecting element of the cover side wall 200 between the two adjacent recesses 231 of the cover side wall 200.Thus, relations (8) and (9) each produce the same effects as relations (3) and (5), except that the roles of base-sidewall 100 and lid-sidewall 200 are reversed.

[0052] As already mentioned, the above relations strictly apply when the lid side wall 200 is shifted relative to the base side wall 100 in the Z-direction, as shown in Fig. 7 shown schematically. If the cover element is pivotally arranged relative to the base element, as in Fig. 1 As shown, the distance between the base side wall 100 and the cover side wall 200 varies along the width of the fuse-switch disconnector 1 in the X-direction. Analogous relationships also apply to the horizontal and vertical distances between the base side wall 100 and the cover side wall 200, and thus the width of the opening area between the base side wall 100 and the cover side wall 200 is effectively limited by the one or more projecting sections 131, as long as there is an overlap area Ü between the base side wall 100 and the cover side wall 200. Therefore, all the technical effects and advantages of the invention described above are achieved in this case as well.

[0053] Fig. 8a bis Fig. 8c Figure 1 schematically shows a base side wall 100 and a cover side wall 200 of the fuse-switch disconnector 1 according to the invention in a first to third embodiment. In particular, Figure 2 shows Fig. 8a schematically the base side wall 100 and the cover side wall 200 of the first embodiment as in Fig. 1 In this first embodiment, the base side wall 100 has one or more projection elements 131, each of which projects in the Z direction relative to a straight section of the base edge 101, and the cover side wall 200 has one or more corresponding recesses 231, wherein in the closed operating state each projection section 131 engages in the corresponding recess 131 in a form-fitting manner.

[0054] In the second embodiment from Fig. 8b The roles of base side wall 100 and cover side wall 200 are reversed; that is, the cover side wall 200 has one or more projecting elements 131, each projecting in the opposite Z-direction relative to a straight section of the cover edge 201, and the base side wall 100 has one or more corresponding recesses 231, wherein, in the closed operating state, each projecting section 131 engages positively in the corresponding recess 131. All the technical effects and advantages described for the first embodiment are also achieved in this second embodiment.

[0055] In the third embodiment from Fig. 8c The base side wall 100 has one or more base projection sections 131 projecting in the Z-direction relative to a straight section of the base edge 101, as well as one or more base recesses 231. The cover side wall 200 has one or more cover projection sections 131 projecting in the opposite Z-direction (particularly relative to a straight section of the cover edge 201, which rests on the straight section of the base edge 101 in the closed operating state), as well as one or more cover recesses 231. When the cover element 20 is in the closed operating position, each base projection section 131 engages in a corresponding cover recess 231, and each cover projection section 131 engages in a corresponding base recess 231 in a form-fitting manner. The third embodiment also achieves all the technical effects and advantages described for the first embodiment.

[0056] Furthermore, as already mentioned in connection with Fig. 1 As mentioned, a fuse-switch disconnector 1 according to the invention comprises a first side wall (i.e., a first base side wall 100 and a first cover side wall 200) and a second side wall (i.e., a second base side wall 100 and a second cover side wall 200) which is opposite the first side wall. The two side walls can be identical, substantially identical, or different. In particular, the first side wall can be one of the Fig. 8a bis 8c the first to third embodiments shown correspond to the second side wall of the same or a different one shown in Fig. 8a bis 8c The first to third embodiments shown can correspond to the embodiments shown. Furthermore, the one or more projecting sections 131 of the first side wall can be identical, substantially identical, or different from the one or more projecting sections 131 of the second base side wall. The features of the two opposing side walls and their respective projecting sections 131 can be varied or combined as desired to further improve the safety and user-friendliness of the fuse-switch disconnector, depending on the intended application.

[0057] The features disclosed in the foregoing description, figures and claims can be important for the realization of the invention as defined in the claims in its various embodiments, both individually and in any combination. Liste der Bezugszeichen

[0058] 1 Fuse switch disconnector 10 Base element 20 Cover element 30 Hook part 90 Contact blade 100 Base side wall 101 Base edge 131 Projection 133 Stepped rebate 200 Cover side wall 201 Cover edge 231 Recess 233 Opposite stepped rebate R Cover rotation axis h D Maximum height of cover element h max Maximum height of a projection section b max Maximum width of a projection section d max Maximum distance between two adjacent projection sections v Distance between cover element and base element Ü Overlap area between base side wall and cover side wall a 1 Width of an opening area within the overlap area Ü a 2 Width of an opening area outside the overlap area Ü

Claims

1. Fuse switch disconnector (1), comprising: a base element (10) and a cover element (20), wherein the cover element (20) is arranged such that it can be moved back and forth relative to the base element (10) between an open position and a closed operating position; wherein the base element (10) comprises a base side wall (100) which is arranged parallel to an X-direction and a Z-direction of an X-Y-Z coordinate system, wherein the Z-direction extends perpendicularly from the X-direction, wherein the base side wall (100) is delimited in the Z-direction by a base edge (101); wherein the cover element (20) comprises a cover side wall (200) which is arranged parallel to the X-direction and the Z-direction, wherein the cover side wall (200) is delimited in a direction opposite to the Z-direction by a cover edge (201); characterized in that the base side wall (100) has one or more projecting sections (131) that protrude in the Z-direction relative to a straight section of the base edge (101), and the cover side wall (200) has one or more recesses (231) that extend in the Z-direction relative to a straight section of the cover edge (201); and wherein when the cover element (20) is arranged in the closed operating position, each projecting section (131) of the one or more projecting sections (131) engages in form-fitting manner in a corresponding recess (231) of the one or more recesses (231) such that the cover edge (201) lies flush with the base edge (101).

2. Fuse switch disconnector (1) according to Claim 1, wherein the cover element (20) is attached to the base element (10) and is arranged pivotably relative to the base element (10) between the open position and the closed operating position about a cover axis of rotation (R), wherein the cover axis of rotation (R) is aligned perpendicularly to the X-direction and perpendicularly to the Z-direction.

3. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) of the one or more projecting sections (131) has a width in the X-direction that decreases along the Z-direction.

4. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) of the one or more projecting sections (131) has a convex shape.

5. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) of the one or more projecting sections (131) has a rectangular shape, a trapezoidal shape or a triangular shape, each preferably with rounded corners, or a bell shape or a sugarloaf shape.

6. Fuse switch disconnector (1) according to any one of the preceding claims, wherein the base side wall (100) has a plurality of projecting sections (131) arranged at regular intervals along the X-direction, wherein the plurality of projecting sections (131) preferably have an identical shape or contour.

7. Fuse switch disconnector (1) according to any one of the preceding claims, wherein the base side wall (100) has two, three, four, five or more projecting sections (131).

8. Fuse switch disconnector (1) according to any one of the preceding claims, wherein the base side wall (100) has a plurality of projecting sections (131), wherein the plurality of projecting sections (131) is delimited by an undulating or sinusoidal section of the base edge (101).

9. Fuse switch disconnector (1) according to any one of the preceding claims, wherein the one or more projecting sections (131) are each delimited by a section of the base edge (101) furnished with a rabbet edge (133), and the one or more recesses (231) are each delimited by a section of the cover edge (201) furnished with an opposing rabbet edge (233), such that the rabbet edge (133) of each projecting section (131) lies flush with the opposing rabbet edge (233) of the corresponding recess (231) when the cover element(20) is in the closed operating position.

10. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) has a maximum height (hmax) in the Z-direction that is greater than or equal to one half of a maximum width (bmax) in the X direction of the projecting section (131), wherein the maximum height (hmax) is preferably greater than or equal to the maximum width (bmax).

11. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) has a maximum height (hmax) in the Z-direction that is greater than or equal to one half of a maximum distance (dmax) in the X-direction between two adjacent projecting sections (131), wherein the maximum height (hmax) is preferably greater than or equal to the maximum distance (dmax).

12. Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projecting section (131) has a maximum height (hmax) in the Z-direction which is greater than or equal to one third, preferably one half or two thirds of a maximum height (hD) of the cover side wall (200) .

13. Fuse switch disconnector (1) according to any one of the preceding claims, wherein the one or more projecting elements (131) are designed and dimensioned in such a way that they at least partially cover a contact area between a receiving unit of the base element (10) and a contact pin (90) of a fuse link inserted in the cover element (20).

14. Fuse switch disconnector (1), comprising: a base element (10) and a cover element (20), wherein the cover element (20) is arranged such that it can be moved back and forth relative to the base element (10) between an open position and a closed operating position; wherein the base element (10) comprises a base side wall (100) which is arranged parallel to an X-direction and a Z-direction of an X-Y-Z coordinate system, wherein the Z-direction extends perpendicularly from the X-direction, wherein the base side wall (100) is delimited in the Z-direction by a base edge (101); wherein the cover element (20) comprises a cover side wall (200) which is arranged parallel to the X-direction and the Z-direction, wherein the cover side wall (200) is delimited in a direction opposite to the Z-direction by a cover edge (201); characterized in that the cover side wall (200) has one or more projecting sections (131) that protrude in the opposite Z-direction relative to a straight section of the cover edge (201), and the base side wall (100) has one or more recesses (231) that extend in the opposite Z-direction relative to a straight section of the base edge (101); and wherein when the cover element (20) is arranged in the closed operating position, each projecting section (131) of the one or more projecting sections (131) engages in form-fitting manner in a corresponding recess (231) of the one or more recesses (231) such that the cover edge (201) lies flush with the base edge (101).