NH fuse type disconnecting switch

Abstract

The invention relates to an NH fuse disconnector, comprising a network access device (3), a housing (2), at least two switch covers (4, 5, 6), and at least one bearing device (7, 8, 9) by means of which the switch covers (4, 5, 6) are mounted on the housing (2) such that they can be moved relative to the housing (2), the switch cover (4, 5, 6) can be arranged in a fuse operating position in order to connect the fuse arranged on the switch cover (4, 5, 6) to the electrical network, and can be arranged in a fuse breaking position in order to disconnect the fuse from the electrical network. According to the invention, the switch covers (4, 5, 6) are rigidly connected to one another. Suitably, at least two switch covers (4, 5, 6), preferably a plurality of switch covers (4, 5, 6), are connected to one another, so that only one of the switch covers needs to be directly actuated, and the switch covers can be moved together into the fuse operating position and / or the fuse breaking position.

Description

Technical Field

[0001] The present invention relates to an NH fuse-type disconnecting switch, comprising a power grid connection device, a housing with electrical bus terminals, at least two switch covers and at least one support device, wherein the switch covers are supported on the housing in a movable manner relative to the housing by means of the support device, wherein the switch covers can be arranged in a fuse operating position to connect the fuse arranged at the switch cover to the power grid, and can be arranged in a fuse breaking position to disconnect the fuse from the power grid. Background Technology

[0002] The above-described type of NH fuse-type disconnector is well-known through use. This type of NH fuse-type disconnector is designed to protect, connect, and disconnect, functioning as both a load switch and a disconnector, allowing the circuit to be connected and disconnected within its rated current range even under load. The fuse in the NH fuse-type disconnector prevents overcurrent or short circuits. NH fuse-type disconnectors typically have a housing with at least three electrical bus terminals and cable terminals. Switch covers are movably supported on the housing. The position of each switch cover can be adjusted using a switch lever. The switching process of connecting or disconnecting the circuit can be performed by moving the switch cover with the inserted fuse element. Summary of the Invention

[0003] The purpose of this invention is to provide an NH fuse-type disconnect switch of the above type that is easier to operate.

[0004] According to the present invention, the solution to achieve the above objective is that the switch covers are rigidly connected to each other.

[0005] The rigid connection ensures that the switch cover in a fuse-type disconnector is always positioned in the same location. To move the switch cover, especially from the operating position to the fuse-disconnected position (in which the switch cover is preferably offset away from the housing relative to the operating position), or vice versa, only one switch cover needs to be actuated directly. Thanks to the rigid connection, the other switch covers can move synchronously. This eliminates the need to actuate each switch cover individually, significantly simplifying the operation of the fuse-type disconnector when moving the switch covers. Furthermore, for fuse-type disconnectors, only one switch cover needs to be provided with a moving mechanism for moving to the operating position and / or the fuse-disconnected position.

[0006] It should be understood that when two or more switch covers are provided, the present invention has advantages as long as the two switch covers are rigidly connected to each other. It is particularly advantageous that the multiple switch covers, especially all switch covers, of the NH fuse-type disconnect switch are rigidly connected to each other.

[0007] Suitablely, the switch covers are interconnected by means of a connecting mechanism so that, preferably, only one switch cover needs to be actuated to move together to the fuse operating position and / or the fuse disconnecting position.

[0008] In an embodiment of the present invention, the switch covers are directly connected to each other.

[0009] Suitably, the connecting mechanism is arranged on the front side of at least one switch cover, preferably on the front side of all interconnected switch covers. Suitably, the connecting mechanism includes at least one rod or bar, preferably including multiple rods or bars.

[0010] In embodiments of the invention, the connecting mechanism and / or switch cover have fastening means for securing the connecting mechanism to the switch cover, preferably a plug-in and / or locking mechanism. Suitably, the fastening means includes both a plug-in and / or locking member and a receiving member provided for this purpose, which may be formed, for example, by an optionally retractable recess.

[0011] In a preferred embodiment of the invention, a plug and / or a locking member are disposed on the connecting mechanism, and a receiving member is formed on the switch cover for this purpose.

[0012] In the design of this invention, at least two switch covers, preferably all switch covers, are independently supported in an NH fuse-type disconnect switch. Therefore, each switch cover is suitably provided with its own dedicated support device.

[0013] In a fuse-type disconnect switch, the switch covers can be arranged at intervals. Preferably, the switch covers are stacked vertically.

[0014] The aforementioned moving device for moving the switch cover preferably includes a connecting rod that is rotatably supported on the housing, and preferably rotatably supported on at least one switch cover.

[0015] A single moving device can be provided for a single switch cover, or a separate moving device can be provided for a single switch cover or for each of the switch covers.

[0016] If the NH fuse-type disconnector has at least two moving parts, then in the design of the present invention, a connecting device is provided for connecting (especially directly connecting) the moving parts. Suitably, the connecting device for connecting the moving parts is movably connected to the moving parts, especially a linkage, which suitably includes at least one rod, particularly preferably a transmission rod, which is preferably directly connected to the linkage.

[0017] To move the switch cover to the fuse operating position or the fuse breaking position, a sliding guide device is suitably provided. This sliding guide device may include, for example, a track along which the switch cover can move relative to the housing. Preferably, the sliding guide device is formed on the housing, and the switch cover has a guide element that can slide on the sliding guide device.

[0018] If the linkage is actuated by a rotational motion, the switch cover slides relative to the housing by a translational motion. Depending on the direction of motion, the switch cover can be moved out of the housing to open, or moved into the housing to close.

[0019] In a particularly preferred embodiment of the invention, the switch cover can be moved (especially displaced) from the fuse operating position to the fuse disconnected position or vice versa by performing only a translational movement. Preferably, the switch cover is supported in such a way that no rotational movement is performed when moving from the fuse operating position to the fuse disconnected position or vice versa. Due to the rigid connection, the front sidewall of the switch cover is always arranged on the same plane and always parallel to the front side of the housing. This simplifies the operation of the NH fuse-type disconnector.

[0020] In an improved embodiment of the invention, the switch cover can be arranged on the housing at a fuse replacement position, in which the fuse is disconnected from the power grid, allowing for particularly convenient replacement. In the fuse replacement position, the switch cover is arranged with its front sidewall facing the housing so that the rear side of the switch cover holding the fuse can be accessed from the front side of the fuse-type disconnector. Suitably, in the fuse replacement position, the switch cover is held on the housing by means of one of the moving devices and / or by means of a connecting device. Preferably, a holding mechanism is formed on the moving device and / or the connecting device, the shape of which is designed to allow it to be inserted into a sliding guide device.

[0021] Thanks to the rigid connection between the switch covers, the switch covers can be removed from the housing with particular ease. The arrangement of the fuse replacement position allows for particularly safe replacement of the NH fuse element.

[0022] In this invention, at least one switch cover and / or at least one moving device are provided with a mechanism for disengagingly locking each other in the fuse operating position, the fuse disconnecting position, and / or the fuse changing position. Preferably, the locking mechanism has a locking protrusion and optionally a recess for receiving the locking protrusion. Advantageously, the switch cover is held in the above-mentioned positions by the locking mechanism, and the NH fuse-type disconnecting switch can be locked in these positions. This simplifies operation and prevents the switch cover from accidentally moving out of the positions.

[0023] In another embodiment of the invention, at least one switch cover and / or at least one moving device has a limiting member for restricting the movement of the disconnecting switch to the fuse operating position and / or the fuse breaking position. Preferably, the limiting member is formed by at least one limiting protrusion protruding from the switch cover or the moving device so that the movement does not exceed the fuse operating position or the fuse breaking position.

[0024] In embodiments of the invention, the switch cover has a retaining device for holding (preferably fixing) the fuse, especially the NH fuse core (e.g., conforming to standard DIN 46320 / 1). This retaining device for the NH fuse core is also commonly referred to as a "fuse lock".

[0025] Suitably, the retaining device includes space for receiving the fuse pull tab and is configured to retain the pull tab. For this purpose, clips, preferably two opposing clips, can be provided to lock the fuse.

[0026] In another embodiment of the invention, at least one switch cover, preferably at least vertically positioned at the top, and particularly preferably positioned at the bottom, is provided with a protrusion projecting toward the housing. This protrusion is spaced apart from the support device and extends at least into the housing in the fuse-broken position. The protrusion serves as a limiting element to hold the switch cover in the fuse-broken position. In the fuse-broken position, the switch cover is stably positioned on the housing by the limiting element and disconnected from the power grid. These switch covers are arranged to partially protrude from the housing, thus allowing for particularly easy and safe manual grasping and removal from the housing. Particularly advantageous is that, for safe manual removal of the switch cover, it can first be manually detached from the fuse-operated position and then positioned in the stable fuse-broken position. Thanks to the stable positioning of the switch cover achieved by the limiting element, it is not necessary to simultaneously release and hold the switch cover. This is advantageous because these switch covers, due to their size and weight, must be removed by both hands.

[0027] When the switch cover is in the fuse-off position, the protrusion closes the space between the housing and the switch cover. This prevents accidental hand contact with one of the wires when replacing the fuse. This forms a so-called anti-contact protection mechanism. The risk of injury when operating the fuse-type disconnect switch is significantly reduced. Suitably, the protrusion is formed by a plate, but it can also be formed by at least one rod or grid. Although the protrusion can be constructed across the entire width of the switch cover, it has been found that constructing a protrusion only across a portion of the width of the switch cover is sufficient. Preferably, the protrusion is located at the edge of the switch cover, particularly preferably at the upper or lower edge of the switch cover.

[0028] In a particularly preferred embodiment of the invention, the protrusion and the housing can be interconnected by means of a detachable connection, preferably by means of a snap-fit ​​and / or locking connection. Suitably, the switch cover can be held in the fuse-broken position by means of a detachable connection. This advantageously ensures that the switch cover remains on the housing when it is detached from the fuse-operated position, thereby preventing the switch cover and the fuse therein from accidentally detaching from the housing. Since the fuse generates intense heat during operation, the risk of injury is reduced.

[0029] It is conceivable that the switch cover and housing are configured to be interconnected even in the fuse operating position via an additional detachable connection, preferably a snap-fit ​​and / or locking connection. Preferably, the detachable connection includes a retaining mechanism (preferably a hook) formed on the protrusion and a mating retaining portion formed on the housing for retaining the mechanism. For example, the mating retaining portion may be formed by a material notch in the housing (in which the hook can engage) or by a locking protrusion (in which the hook can abut in the fuse operating position).

[0030] Suitablely, the connection can be disengaged by actuating the protrusion, and particularly preferably by manual actuation. The NH fuse-type disconnector can be operated particularly easily if the connection can be disengaged by manually applying force to the space between the switch cover and the housing in the fuse-broken position.

[0031] The protrusion may be provided with a gripping part for manual actuation, which is preferably formed by a notch, especially a gripping groove. Alternatively, the gripping part may also be formed on the switch cover at least near the protrusion.

[0032] In an improved embodiment of the invention, at least one front sidewall of the switch cover has through holes in the section for arranging the fuse, and these through holes are arranged adjacent to each other to form a grid. This allows for the identification of the markings on the fuse core located behind it. Furthermore, an IP2X-compliant protection mechanism is formed.

[0033] Advantageously, the switch cover can be integrally formed, preferably from a single material (e.g., plastic). Compared to known switch covers that have windows and require multiple components possibly made of different materials during manufacturing, the switch cover of the present invention has a lower manufacturing cost.

[0034] Suitablely, the aforementioned access device includes at least one bus terminal.

[0035] It should be understood that the NH fuse-type disconnect switch has a terminal cavity in which electrical cable terminals are disposed. Suitably, the terminal cavity is arranged above or below the housing section for accommodating the switch cover, preferably vertically above or below it. Attached Figure Description

[0036] The present invention will now be described in detail with reference to the embodiments and the accompanying drawings of these embodiments.

[0037] In the picture:

[0038] Figure 1 Isometric cross-sectional views of the NH fuse-type disconnecting switch according to the present invention at different positions are shown;

[0039] Figure 2 An exploded view of the components of the NH fuse-type disconnector according to the present invention is shown;

[0040] Figure 3 and Figure 4 An isometric view of the components of the NH fuse-type disconnector according to the present invention is shown;

[0041] Figure 5 and Figure 6 Detailed diagrams of the components of the NH fuse-type disconnector according to the present invention are shown;

[0042] Figures 7 to 9 Different views of the components of the NH fuse-type disconnector according to the present invention are shown;

[0043] Figure 10 It shows Figure 1 The diagram shows isometric views of the NH fuse-type disconnecting switch according to the present invention at different locations. Detailed Implementation

[0044] Figure 1 An NH fuse-type disconnector 1 according to the present invention is shown, which has a housing 2 and three switch covers 4, 5, 6 stacked vertically within the housing 2. From Figure 1 As can be seen in c, the bus terminal 3 of the NH fuse-type disconnector 1 is also present. The NH fuse-type disconnector 1 also has a cable connection terminal 33, which is arranged in the terminal cavity cover 34.

[0045] In order to make Figure 5 The switch covers 4, 5, and 6 shown are directly rigidly connected and equipped with a connecting mechanism, which includes two connecting strips 10 arranged on the front sidewalls 25, 26, and 27 of the switch covers 4, 5, and 6, respectively. In particular, as shown... Figure 2 (Partial exploded view of NH fuse-type disconnector 1) and Figure 4 As shown, the connecting strip 10 is provided with a connecting hook 11, which can be inserted into the recess 12 on the front sidewalls 25, 26, and 27 for receiving the connecting hook 11. When the connecting strip 10 is arranged on the front sidewalls 25, 26, and 27, the connecting hook 11 is embedded in the recess 12.

[0046] Limiting elements 40 and 41 and locking protrusions 42 and 43 are formed on the vertical side of the sidewall 36 protruding from the front plate 25, 26 and 27.

[0047] The switch covers 4, 5, and 6 include retaining devices on the support devices 7, 8, and 9 for movably holding them on the housing 2. Each of these support devices includes a side wall 22, a drive member 23, and a guide member 24, which is slidably arranged in guide rails 47, 48, and 49 provided in the support devices 7, 8, and 9.

[0048] The NH fuse-type disconnect switch 1 includes links 13 and 14, each equipped with a gripping part, by means of which the switch covers 4, 5, and 6 can move relative to the housing 2. In particular, as shown... Figure 6 As shown, a notch 21 (in which the drive member 23 can be inserted) is provided in the connecting plate 22 of the connecting rods 13 and 14, and a bolt-shaped support member 20 (for insertion into the corresponding notch 30 in the housing 2) is formed. Notches 44 and 45 (for receiving locking protrusions 42 and 43) are formed in the connecting plate 22, and a retaining pin 46 is formed, by which the interconnected switch covers 4, 5, and 6 can be arranged together on the housing 2, as described below.

[0049] To connect the connecting rods 13 and 14, a coupling mechanism 15 is provided. The coupling mechanism 15 includes a vertical rod 16 and a horizontal rod 17 connecting the vertical rods 16 to each other. A plug 18 is formed at the end of the vertical rod 16, which can be inserted into a recess 19 provided in the connecting rods 13 and 14.

[0050] At the upper edge of the switch cover 4, alternatively or supplementarily, if necessary, at least one switch cover 5, 6 may have a protrusion 29 projecting from the switch cover 4, 5, 6 toward the housing 2. This protrusion 29 particularly projects from the side wall 36 of the switch cover 4, 5, 6. Especially as... Figure 8 and Figure 9 As shown in (b), the protrusion 29 has a gripping groove 38 on its upper side. The protrusion 29 is provided with a hook 37 on the side away from the cover 4, 5, 6. The housing 2 is provided with a mating holding part 39 for the hook 37.

[0051] like Figure 8 As shown, NH fuse elements 31 (e.g. conforming to standard DIN43620 / 1) can be arranged on the inner side of switch covers 4, 5, and 6, and here, NH fuse elements 31 are fastened in a detachable manner by means of clips 32 engaging with the pull tabs of NH fuse elements 31.

[0052] The operation of the NH fuse-type disconnector 1 according to the present invention is described in detail below.

[0053] If the NH fuse-type disconnector 1 is in the fuse operating position (e.g.) Figure 1 (a) and Figure 1 (as shown in the vertical section of (c)), the switch covers 4, 5, and 6 are flush with the housing 2. The connecting rods 13 and 14 are in the closed position, with the support member 24 arranged in the rear area of ​​the corresponding support devices 7, 8, and 9.

[0054] Figure 7 (a) shows a section cross-sectional view of the NH fuse-type disconnector 1, as shown, with the limiting member 40 located on the connecting plate 22. The locking protrusion 42 is located in the recess 44 at the locking position.

[0055] To move switch covers 4, 5, and 6 to the fuse disconnect position (in this position, switch covers 4, 5, and 6 are offset away from housing 2 relative to the fuse operating position), disengage switch covers 4, 5, and 6 from the latching position of the fuse operating position, and pivot one or both of connecting rods 13 and 14 together to... Figure 1 (b) and Figure 7 (b) shows the position. Through this movement, as the support member 24 shifts, the switch covers 4, 5, and 6 are moved away from the housing 2 in a translational manner, creating an open space between the switch covers 4, 5, and 6 and the housing 2. The connecting rods 13 and 14 can move until the connecting plate 22 abuts against the limiting member 41. At this point, in the fuse-breaking position, the locking protrusion 43 is positioned in the locking recess 45.

[0056] In the fuse-off position, the latch 37 abuts against the mating retainer 39. This holds the switch covers 4, 5, and 6 on the housing 2, preventing them from accidentally detaching and falling off. Additionally, the protrusion 29 prevents a person from accidentally inserting their hand into the space between the switch covers 4, 5, and 6 and the housing 2, thus preventing contact with live conductors.

[0057] To detach the switch covers 4, 5, and 6 from the housing 2, press down on the protrusion 29 by hand to deform it, thereby disengaging the hook 37 from the mating retaining part 39. At this point, the switch covers 4, 5, and 6, along with the NH fuse core 31 arranged therein, can be removed from the housing 2.

[0058] To replace the NH fuse element 31, switch covers 4, 5, and 6 can be arranged at the fuse replacement positions on housing 2. From Figure 10 As can be seen in (a), the interconnected switch covers 4, 5, and 6 are first moved to the fuse disconnect position (e.g., Figure 10 As shown in the right figure in (a). Then press the gripping groove 38 by hand to disengage the hook 37 from the mating retaining part 39. Switch covers 4, 5, and 6 can be removed from housing 2 in the direction of arrow P1. Figure 10(a) in the middle position). Then, links 13 and 14 pivot upwards in the direction of arrow P2 ( Figure 10 (the left position in (a)). Then, the switch covers 4, 5, and 6 are rotated 180° around their longitudinal axis in the direction of arrow P3. Figure 10 (b) left position), and enter the holding position on the housing 2, wherein the switch covers 4, 5, 6 are moved in the direction of arrow P4 and their holding pins 46 are placed in the guide rails 47, 48, 49 of the support devices 7, 8, 9. At this time, the switch covers 4, 5, 6 are held on the housing 2, and the NH fuse element 31 can be replaced.

[0059] In order to return the switch covers 4, 5, and 6 to the fuse-broken position after replacing the NH fuse element 31, the above actions must be performed in reverse order.

[0060] If the NH fuse-type disconnector 1 is moved from the fuse operating position to the fuse breaking position or in the reverse direction by means of one or both of the connecting rods 13 and 14, the switch covers 4, 5, and 6 are interconnected by the connecting strip 10, and all switch covers 4, 5, and 6 will always move synchronously. This makes the operation of the fuse-type disconnector 1 particularly convenient.

[0061] Furthermore, the force applied to one of the links 13 and 14 is transmitted to the corresponding other link 14 or 13 via the coupling mechanism 15.

[0062] like Figure 5 As shown, taking the front sidewall 25 as an example, the switch covers 4, 5, and 6 are provided with multiple through holes 28. These through holes 28 are arranged adjacent to each other, forming a grid in the front sidewalls 25, 26, and 27. The front sidewalls 25, 26, and 27 are completely open in the areas of the through holes 28. Preferably, the through holes 28 are not covered, especially not covered with transparent material to form windows. This provides excellent ventilation and heat dissipation.

[0063] The maximum diameter of the through hole 28 is 12mm. The shape of the through hole is designed to prevent human fingers from inserting. Switch covers 4, 5, and 6 meet IP2X standards.

[0064] Advantageously, the through-hole 28 allows for air cooling of the NH fuse element 31 located behind the cover. Furthermore, the NH fuse element 31, especially the markings on it, can be viewed through the through-hole.

[0065] As Figure 1 and Figure 10 In the alternative arrangement shown, the NH fuse-type disconnector 1 can be rotated 180° for installation, such that the terminal cavity cover 34 and the cable terminal 33 are vertically arranged above the housing section for accommodating the switch covers 4, 5, and 6.

[0066] The housing 2 has symmetrically arranged receiving areas for accommodating one of the switch covers 4, 5, and 6, so that the switch covers 4, 5, and 6 can also be positioned relative to each other. Figures 1 to 3 The positions shown are rotated 180° and then placed into these containing areas.

[0067] In the receiving area, there is another matching retaining part 35 opposite to the matching retaining part 39, so that when arranged in the rotated position, the corresponding hooks 37 of the switch covers 4, 5, and 6 can be locked to the matching retaining part 35.

Claims

1. An NH fuse-type disconnect switch, comprising a power grid connection device (3), a housing (2), at least two switch covers (4, 5, 6) and at least one support device (7, 8, 9), wherein the switch covers (4, 5, 6) are supported on the housing (2) by the support device in a manner movable relative to the housing (2), wherein, The switch covers (4, 5, 6) can be arranged in the fuse operating position to connect the fuse located at the switch covers (4, 5, 6) to the power grid, and can also be arranged in the fuse disconnecting position to disconnect the fuse from the power grid. Its features are, The switch covers (4, 5, 6) are rigidly connected to each other.

2. The NH fuse-type disconnector according to claim 1, Its features are, The switch covers (4, 5, 6) are directly connected to each other.

3. The NH fuse-type disconnector according to claim 1 or 2, Its features are, The switch covers (4, 5, 6) are supported separately from each other.

4. The NH fuse-type disconnector according to any one of claims 1 to 3, Its features are, The switch covers (4, 5, 6) are interconnected, so that the switch covers can move together to the working position of the fuse and / or the breaking position of the fuse.

5. The NH fuse-type disconnector according to any one of claims 1 to 4, Its features are, The switch cover (4, 5, 6) can move, especially shift, from the fuse working position to the fuse breaking position or from the fuse breaking position to the fuse working position simply by performing a translational movement.

6. The NH fuse-type disconnector according to any one of claims 1 to 5, Its features are, The switch covers (4, 5, 6) are directly connected to each other by a connecting mechanism (10), which is arranged on the front side of at least one of the switch covers (4, 5, 6), and preferably on the front side of all the interconnected switch covers (4, 5, 6).

7. The NH fuse-type disconnector according to claim 6, Its features are, The connecting mechanism (10) is provided with a fastening device (11) for fastening it to the switch cover (4, 5, 6), and preferably is provided with a plug-in and / or locking mechanism.

8. The NH fuse-type disconnector according to claim 6 or 7, Its features are, The switch cover (4, 5, 6) is provided with a mechanism (12) for fastening the connecting mechanism (10), which preferably includes at least one buckling notch (12).

9. The NH fuse-type disconnector according to any one of claims 1 to 8, Its features are, A moving device (13) is provided for moving the switch cover (4, 5, 6) relative to the housing (2), which is preferably connected to each other by means of a connecting device (15) for connecting the moving device (13), wherein the moving device (13) preferably includes a connecting rod (13).

10. The NH fuse-type disconnector according to any one of claims 1 to 9, Its features are, The switch cover (4, 5, 6) can be arranged at the fuse replacement position to replace the fuse at the housing (2). At the fuse replacement position, the switch cover (4, 5, 6) is arranged with its front sidewall (24, 25, 26) facing the housing (2). Preferably, at least one of the moving devices (13) and / or the connecting device (15) for connecting the moving device (13) is arranged on the housing (2).

11. The NH fuse-type disconnector according to claim 9 or 10, Its features are, At least one of the switch covers (4, 5, 6) and / or at least one of the moving devices (13) are provided with locking mechanisms (42, 43, 44, 45) for locking each other in the working position, the fuse breaking position and / or the fuse replacement position and / or with limiting mechanisms (40, 41) for being arranged in the working position and / or the fuse breaking position.

12. The NH fuse-type disconnector according to claim 11, Its features are, The locking mechanism (42, 43, 44, 45) includes a locking protrusion and an optional recess for receiving the locking protrusion, and / or the limiting mechanism (40, 41) has a limiting protrusion.

13. The NH fuse-type disconnector according to any one of claims 1 to 12, Its features are, At least one of the switch covers (4, 5, 6) has a front sidewall (25, 26, 27), the inner side of which is configured to accommodate an NH fuse core, and through holes are provided in the section for accommodating the NH fuse core, these through holes being adjacent to each other and juxtaposed to form a grid.

14. The NH fuse-type disconnector according to any one of claims 1 to 13, Its features are, The switch covers (4, 5, 6) can be arranged at a fuse replacement position on the housing (2), where the front sidewalls (24, 25, 26) of the switch covers (4, 5, 6) face the housing (2) so that the rear side of the switch covers (24, 25, 26) holding the fuse can be accessed from the front side of the fuse-type disconnect switch (1). The switch covers (24, 25, 26) are preferably held on the housing (2) by means of one of the moving devices (13) and / or by means of the connecting device (15) at the fuse replacement position.

15. The NH fuse-type disconnector according to any one of claims 1 to 14, Its features are, At least one of the switch covers (4, 5, 6), preferably at least the uppermost switch cover arranged vertically, is provided with a protrusion protruding toward the housing, the protrusion being spaced apart from the support device and extending at least to the housing at the fuse disconnect position.

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