DE102022103910A1 - FUSE LOAD DISCONNECT SWITCHES, IN PARTICULAR NH FUSE LOAD DISCONNECT SWITCHES - Google Patents

Abstract

A fuse switch disconnector (1) comprises a base element (10) and a cover element (20), the cover element (20) being arranged to be movable back and forth relative to the base element (10) between an open position and a closed operating position. The base element (10) comprises a base side wall (100) which is arranged parallel to an X-direction and a Z-direction, the Z-direction being perpendicular to the X-direction. The base sidewall (100) is delimited in the Z-direction by a base edge (101). The cover element (20) comprises a cover side wall (200) which is arranged parallel to the X-direction and the Z-direction. The cover side wall (200) is delimited in a direction opposite to the Z-direction by a cover edge (201). The base side wall (100) has one or more projection portions (131) protruding in the Z direction, and the lid side wall (200) has one or more recesses (231). When the lid element (20) is arranged in the closed operating position, each projection section (131) of the one or more projection sections (131) positively engages in a corresponding recess (231) of the one or more recesses (231) so that the lid Edge (201) rests on the base edge (101).

Description

The present invention relates to a fuse switch-disconnector and, more particularly, to an NH (low-voltage, heavy-duty) fuse switch-disconnector. Such fuse switch disconnectors are particularly suitable for connecting electrical devices, and they are used in particular to protect against overcurrents and short circuits.

Similar systems are out, for example EP 2 584 577 B1 or EP 3 016 122 A1 known. In particular, fuse switch disconnectors are known which comprise a base element and a cover element for opening or closing the fuse switch disconnector.

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.

This object is achieved 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, the cover element being arranged such that it can be moved back and forth relative to the base element between an open position and a closed operating position. The base member includes a base sidewall arranged parallel to an X-direction and a Z-direction, the Z-direction being perpendicular to the X-direction, the base sidewall being defined in the Z-direction by a base edge is limited. The cover element comprises a cover side wall which is arranged parallel to the X-direction and the Z-direction, the cover side wall being delimited in a direction opposite to the Z-direction by a cover edge. The base side wall has one or more projection portions protruding in the Z direction, and the lid side wall has one or more recesses. When the lid member is disposed in the closed operative position, each projection portion of the one or more projection portions positively engages a corresponding recess of the one or more recesses such that the lid edge overlies the base edge.

The Z-direction may also be referred to as a positive Z-direction, and the direction opposite to the Z-direction may also be referred to as an opposite Z-direction or a negative Z-direction.

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 next to each other on the busbars. The fuse switch disconnector can be multi-pole. The NH fuse switch disconnector can preferably have 3 poles and be designed for a total of three fuse links. For each of the three fuse links, the base element can comprise two receiving units for clamping and contacting a respective contact blade of the respective fuse link, ie a total of six receiving units for a total of six contact blades. In particular, a 3-pole fuse switch disconnector can be mounted on three busbars, each corresponding to one pole.

In an operating state of the fuse switch disconnector, the cover element is arranged in the closed operating position. If the cover element is arranged in the closed operating position, the fuse switch disconnector does not necessarily have to be in the operating state, but can also be z. B. be in an unlocked state in which the NH fuse links have been removed from the cover element. The unlocked state can e.g. B. be achieved by the cover member is opened, the fuse links are removed from the cover member and the cover member is then closed again. In the unlocked state z. B. Maintenance work on the fuse switch disconnector, the busbar or an electrical device connected to the fuse switch disconnector can be carried out without voltage.

As previously mentioned, the base sidewall has one or more protruding portions protruding in the Z-direction, and the lid sidewall has one or more recesses. In particular, each protruding portion of the base sidewall can be defined by a corresponding portion of the base edge, and each recess of the lid sidewall can be defined by a corresponding portion of the lid edge. When the lid member is placed in the closed operative position each projection section engages in a corresponding recess in a form-fitting manner, so 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 on one another in a form-fitting manner and together form a side wall of the fuse switch disconnector, in particular a side wall with a uniform wall thickness.

It should be noted that as an alternative to the embodiment described above, the roles of the cover element and 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 member includes a base sidewall arranged parallel to an X-direction and a Z-direction, the Z-direction being perpendicular to the X-direction, the base sidewall being defined in the Z-direction by a base edge is limited. The cover element comprises a cover side wall which is arranged parallel to the X-direction and the Z-direction, the cover side wall being delimited in a direction opposite to the Z-direction by a cover edge. The lid side wall has one or more projection portions protruding in the opposite Z-direction, and the base side wall has one or more recesses. When the lid member is disposed in the closed operative position, each projection portion of the one or more projection portions positively engages a corresponding recess of the one or more recesses such that the lid edge overlies the base edge.

In a third embodiment, the base sidewall has one or more Z-direction projecting base projection portions and one or more base recesses, and the lid sidewall has one or more opposite Z-direction projecting lid projection sections and one or more cover recesses. When the lid member is disposed in the closed operative position, each base projection portion engages a respective lid recess and each lid projection portion engages a respective base recess such that the lid edge overlies the base edge.

For the sake of simplicity, the further features of the invention are described below only in relation to the first embodiment. However, all features of the first embodiment, in particular the special features of the projection sections and the recesses, can be implemented analogously in the second and in the third embodiment.

In an operating state of the fuse switch disconnector, the cover element is initially arranged in the closed operating position. When a user moves the lid member from the closed operative position to the open position, an electrical connection e.g. B. between contact swords of fuse links, which are inserted into the cover element, and receiving units, which are attached to the base element. As a result, the operating state can be interrupted and an electric current or an electric voltage inside the fuse switch disconnector can be interrupted. However, the current or the voltage is only interrupted when the cover element is sufficiently far away from the closed operating position, so that the contact between the contact swords and the receiving units has been interrupted. If, on the other hand, the position of the cover element is still close to the closed operating position, the contact between the contact swords and the receiving units can continue, and thus even if the fuse switch disconnector has already been opened a little, a current or a voltage can still be in the be present inside the fuse switch disconnector. With conventional fuse switch disconnectors, this can pose a risk to a user who first opens the fuse switch disconnector a little and then accidentally puts his or her hand or fingers into an opening area between the base element and the cover element while current or voltage is still inside of the fuse switch disconnector is present. In particular, this can cause the user to receive an electric shock, thereby endangering their health.

The problem described above is solved by the fuse switch disconnector according to the invention. In the closed operating position, each projection section of the base element engages in a form-fitting manner, ie in particular completely, in a corresponding recess in the cover element. When the lid member is moved slightly from the closed operative position toward the open position, each projection portion is still partially engaged in a corresponding recess so that there is an overlap area in the Z direction between the base and Side wall and the lid side wall there. In this position of the cover element, an opening area between the cover side wall and the base side wall does not extend over an entire width of the fuse switch disconnector in the X direction, but is interrupted by the one or more projection sections. Thus, the width of an opening area between the lid side wall and the base side wall is limited in the X direction. In this way, it is made more difficult or prevented for a user who opens the fuse switch disconnector to reach into the interior of the fuse switch disconnector with his hand or fingers through the opening area as long as current or voltage is still present inside. This increases the safety and user-friendliness of the fuse switch disconnector compared to conventional fuse switch disconnectors.

According to an aspect that is also independently inventive, the cover element is attached to the base element and arranged so that it can pivot relative to the base element between the open position and the closed operating position about a cover rotation axis, the cover rotation axis being perpendicular to the X direction and perpendicular to the Z -Direction is arranged. In other words, the axis of rotation of the lid runs parallel to a Y-direction, which 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 precise positioning of the cover element with respect to the base element during the closing process of the cover element is made possible, so that there is a risk of damage to the cover element and the base element, in particular the one or more projection portions, is reduced.

In a preferred embodiment of the fuse switch disconnector, each projection portion of the one or more projection portions 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 and the risk of damage to the cover element and the base element, in particular the one or more projection sections, is reduced.

In particular, each projection portion may have a convex shape. This also has the advantage that the cover element can be opened and closed more easily and the risk of damage to the cover element and the base element, in particular the one or more projection sections, is reduced. In addition, the convex projection portion can be produced more easily and at lower cost.

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. B. by an injection molding process that is particularly efficient and inexpensive. This achieves high stability of the corresponding components of the fuse switch disconnector.

Each projection portion may have a rectangular shape, a trapezoidal shape, or a triangular shape. In each case, this has the advantage that the projection sections are particularly stable and can be produced in a simple and cost-effective manner. Furthermore, each protruding portion may have rounded corners, which further reduces the risk of damaging the protruding portion, particularly breaking off the corners of the protruding portion, when opening and closing the lid member. Alternatively, each projection portion may have a bell shape or a sugar loaf shape. This also has the advantage that the projection sections are particularly stable and can be produced in a simple and cost-effective manner.

In a preferred embodiment, the base side wall has a plurality of projection portions arranged at regular or substantially regular intervals along the X-direction. That is, the distances between each two adjacent projecting portions 131 may be equal or substantially equal. In this case, the cover side wall can also have a plurality of recesses which are arranged at regular or substantially regular intervals along the X-direction. When the lid member is disposed in the closed operative position, each projection portion of the plurality of projection portions positively engages a corresponding recess of the plurality of recesses such that the lid edge overlies the base edge. This has the following advantage: When the cover element is moved from the closed operating position a little in the direction of the open position, each projection section of the plurality of projection sections engages partially in a corresponding recess of the plurality of recesses, so that there is an overlapping area in the Z There is direction between the base side wall and the lid side wall. In this position of the cover element, an opening area between the cover side wall and the base side wall does not extend over an entire width of the fuse switch disconnector in the X direction, but is through the Plurality of projection sections interrupted. Thus, the width of an opening portion between the cover side wall and the base side wall in the X direction is restricted by the plurality of projecting portions, and this makes it difficult or impossible for a user who opens the fuse switch disconnector with his hand or his Fingers reach through the opening area into the interior of the fuse switch disconnector as long as there is still current or voltage inside.

Preferably, the plurality of projection portions have an identical or substantially identical shape or contour. This has the advantage that the plurality of projection sections can be produced in a simple and inexpensive manner.

The base sidewall may have two, three, four, five or more projection sections. In these cases, the lid side wall can also have two, three, four, five or more corresponding recesses, so that each projection section engages in a corresponding recess when the lid element is in the closed operating position. The larger the number of the protruding portions, the smaller the widths of the respective protruding portions and/or the smaller the intervals between adjacent protruding portions. Thus, the width of an opening portion between the cover side wall and the base side wall in the X direction can be restricted particularly effectively by the plurality of projecting portions, and thus the safety and user-friendliness of the circuit breaker is further increased.

In a preferred embodiment, the base sidewall has a plurality of boss portions, the plurality of boss portions being defined by an undulating or sinusoidal portion of the base edge. This enables high stability and particularly cost-effective production of the protruding sections.

According to an aspect that is also independently inventive, the one or more projection sections are each delimited by a rabbeted section of the base edge and the one or more recesses are each delimited by an opposite rabbeted section of the lid edge, so that the rabbet of each Projection portion abuts against the opposite shiplap of the corresponding recess when the lid member is disposed in the closed operative position. This has the advantage that a tight seal between the base element and the cover element is achieved in the operating state of the fuse switch disconnector, so that z. B. no liquid between the cover element and the base element can get through into the interior of the fuse switch disconnector. Damage to the fuse switch disconnector can thus be prevented.

In a preferred embodiment, each protrusion portion has a maximum height in the Z-direction that is greater than or equal to half a maximum width in the X-direction of the protrusion portion, more preferably the maximum height is greater than or equal to the maximum width. The maximum height of a protruding portion may be a maximum amount that the protruding portion protrudes in the Z direction. This embodiment has the advantage that a width of an opening area in the X-direction between the cover side wall and the base side wall is effectively reduced, as explained in more detail below, in particular in connection with FIG. ₇ .

Alternatively or additionally, each protrusion portion may have a maximum height in the Z-direction that is greater than or equal to half a maximum distance in the X-direction between two adjacent protrusion portions, more preferably the maximum height is greater than or equal to the maximum distance . This also has the advantage that a width of an opening area in the X direction between the lid side wall and the base side wall is reduced. This further increases the safety and user-friendliness of the fuse switch disconnector.

Further, each projection portion may have a maximum height in the Z-direction that is greater than or equal to one-third, preferably one-half or two-thirds of a maximum height of the lid sidewall. 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 little way from the closed operating position in the direction of the open position. The protection against the user reaching into the interior of the fuse switch disconnector is thus further improved, even if the cover element has already been moved a little in the direction of the open position.

In a further preferred embodiment, the one or more projection sections are arranged, designed and/or dimensioned in such a way that they form a contact area between a receiving unit of the base element and at least partially cover a contact blade of a fuse link inserted into the cover element. This prevents the user from accidentally touching a current-carrying contact area, even if his hand accidentally gets inside the fuse switch disconnector. This further increases the safety and user-friendliness of the fuse switch disconnector.

• 1 eine perspektivische Ansicht einer ersten Ausführungsform des erfindungsgemäßen Sicherungslasttrennschalters, wobei sich das Deckelelement in der geöffneten Position befindet;
• 2 eine perspektivische Ansicht des Sicherungslasttrennschalters aus 1, in der eine in die Y-Richtung weisende Seitenfläche zu sehen ist, wobei sich das Deckelelement in der geschlossenen Betriebsposition befindet;
• 3 eine perspektivische Ansicht des Sicherungslasttrennschalters aus 1, in der die in die Y-Richtung weisende Seitenfläche zu sehen ist, wobei sich das Deckelelement zwischen der geöffneten und der geschlossenen Betriebsposition befindet;
• 4 eine perspektivische Ansicht des Sicherungslasttrennschalters aus 1, in der eine in die entgegengesetzte Y-Richtung weisende Seitenfläche zu sehen ist, wobei sich das Deckelelement in der geschlossenen Betriebsposition befindet;
• 5 eine perspektivische Ansicht des Sicherungslasttrennschalters aus 1, in der eine in die entgegengesetzte Y-Richtung weisende Seitenfläche zu sehen ist, wobei sich das Deckelelement zwischen der geöffneten und der geschlossenen Betriebsposition befindet;
• 6 eine weitere perspektivische Ansicht des Sicherungslasttrennschalters aus 1, in der das Deckelelement ausgehend von der geschlossenen Betriebsposition ein Stück weit in Richtung der geöffneten Position bewegt wurde, so dass ein Vorsprungsabschnitt des Basiselements noch teilweise in eine Aussparung des Deckelelements eingreift, so dass ein Überlappbereich in der Z-Richtung zwischen der Basis-Seitenwand und der Deckel-Seitenwand existiert;
• 7 eine schematische Darstellung eines Ausschnitts aus einer Basis-Seitenwand und einer Deckel-Seitenwand eines erfindungsgemäßen Sicherungslasttrennschalters, wobei jeder Vorsprungsabschnitt der Basis-Seitenwand teilweise in eine entsprechende Aussparung der Deckel-Seitenwand eingreift, so dass ein Überlappbereich in der Z-Richtung zwischen der Basis-Seitenwand und der Deckel-Seitenwand existiert;
• 8a eine schematische Darstellung einer Basis-Seitenwand und einer Deckel-Seitenwand des Sicherungslasttrennschalters der ersten Ausführungsform;
• 8b eine schematische Darstellung einer Basis-Seitenwand und einer Deckel-Seitenwand des Sicherungslasttrennschalters der zweiten Ausführungsform; und
• 8c eine schematische Darstellung einer Basis-Seitenwand und Deckel-Seitenwand des Sicherungslasttrennschalters der dritten Ausführungsform.

These and other features and advantages of the invention will become clear from the accompanying drawings, which show particularly advantageous embodiments. Show it:

• 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;
• 2 a perspective view of the fuse switch disconnector 1 12, in which a side face facing in the Y-direction can be seen, with the lid member in the closed operative position;
• 3 a perspective view of the fuse switch disconnector 1 12 showing the side surface facing in the Y-direction with the lid member between the open and closed operative positions;
• 4 a perspective view of the fuse switch disconnector 1 12 showing a side surface facing in the opposite Y-direction, with the lid member in the closed operative position;
• 5 a perspective view of the fuse switch disconnector 1 12 showing a side surface facing in the opposite Y-direction, with the lid member being between the open and closed operative positions;
• 6 Another perspective view of the fuse switch disconnector 1 , in which the cover element, starting from the closed operating position, has been moved a little in the direction of the open position, so that a protruding section of the base element still partially engages in a recess of the cover element, so that an overlap area in the Z direction between the base side wall and the lid side wall exists;
• 7 a schematic representation of a section of a base side wall and a cover side wall of a fuse switch disconnector according to the invention, each projection section of the base side wall partially engaging in a corresponding recess of the cover side wall, so that an overlap area in the Z direction between the base side wall and the lid side wall exists;
• 8a a schematic representation of a base side wall and a cover side wall of the fuse switch disconnector of the first embodiment;
• 8b a schematic representation of a base side wall and a cover side wall of the fuse switch disconnector of the second embodiment; and
• 8c a schematic representation of a base side wall and cover side wall of the fuse switch disconnector of the third embodiment.

1 shows a first embodiment of a fuse switch disconnector 1 according to the invention, this fuse switch disconnector 1 being a 3-pole NH fuse switch disconnector 1 which is 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, for each of the three fuse links, the fuse switch disconnector 1 comprises two receiving units for clamping and contacting one 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 in such a way that it can be attached to a busbar system by means of hook parts 30 can be attached, which includes a total of three busbars in the 3-pole version.

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, the cover element 20 being arranged in the closed operating position in an operating state of the fuse switch disconnector 1 . In this embodiment, the lid member 20 is fixed to the base member 10 and pivotally disposed relative to the base member 10 between the open position and the closed operative position about a lid rotation axis R, which is parallel to a Y-direction. 1 shows the lid element in the open position, 2 and 4 respectively show the lid element in the closed operating position, and 3 , 5 and 6 each show the lid member in a position between the open position and the closed operative position.

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 delimits the fuse switch disconnector 1 in the negative Y-direction. The first base side wall 100 is as viewed in FIG 1 the front, non-covered basic side wall. The X-direction, the Y-direction and the Z-direction are each perpendicular to one another. The first base sidewall 100 is bounded by a first base edge 101 in the Z-direction. The lid element 20 comprises a first lid side wall 200, which is arranged parallel to the X-direction and the Z-direction and points in the negative Y-direction. The first cover side wall 200 is delimited by a first cover edge 201 in a direction opposite to the Z-direction. In this embodiment, the first base side wall 100 includes five first projection portions 131 protruding in the Z direction, and the first lid side wall 200 includes five first recesses. When the lid element is arranged in the closed operating position, each first projection section 131 positively engages a corresponding first recess 231 so that the first lid edge 201 rests on the first base edge 101, as shown in FIG 4 you can see. The first projection sections 131 can each be arranged, 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 blade 90 of a fuse link inserted into the cover element 20 .

In addition, the fuse switch disconnector 1 includes 1 a second base side wall 100 having a second projection portion 131, the second base side wall 100 facing in the positive Y direction and the first base side wall 100 facing. In 1 For example, the second base side wall 100 is partially covered and therefore cannot be seen except for the second projection section 131 of the second base side wall 100 . The second projection portion 131 has a trapezoidal shape in this embodiment. Furthermore, the fuse switch disconnector 1 comprises a second cover side wall 200 with a second recess 231, the second cover side wall 100 also pointing in the positive Y-direction and being opposite the first cover side wall 200 so that it 1 is not recognizable. When the lid element 20 is arranged in the closed operating position, the second projection section 131 engages in a form-fitting manner in the second recess 231, as in FIG 2 you can see. The second projection section 131 can be arranged, designed and dimensioned in such a way that it at least partially covers a contact area between a receiving unit of the base element 10 and a contact blade 90 of a fuse link inserted into the cover element 20 .

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. B. only one base side wall with one or more projection elements and only one lid side wall with one or more recesses, while the opposite base side wall includes neither a projection element nor a recess and the opposite lid side wall neither a projection element nor a recess includes. In the following, the first and the second base side wall of the embodiment are shown 1 each referred to simply as a "base sidewall" when it is not necessary to distinguish between the first and second base sidewalls. Likewise, the first and second lid side walls of the embodiment are made of 1 each referred to simply as a "lid sidewall" when it is not necessary to distinguish between the first and second lid sidewalls.

2 and 3 each show a perspective view of the fuse switch disconnector 1 , in which the second base side wall 100 and the second cover side wall 200 can be seen. In 2 the lid member 20 is in the closed operating position while it is in 3 is in a position between the open and closed operating positions. The base sidewall 100 is bounded by the base edge 101 in the Z-direction (positive Z-direction). The lid sidewall 200 is bounded by the lid edge 201 in the opposite Z-direction (negative Z-direction). The base side wall 100 has the protruding portion 131 protruding in the positive Z direction, and the lid side wall 200 has the corresponding recess 231 . The protruding portion 131 in this embodiment has a width in the X direction that decreases along the Z direction, and the protruding portion has a convex shape, more specifically, a trapezoidal shape. Also, the corners of the projection portion 131 are slightly rounded. Such a projection section is particularly easy and inexpensive to produce and has a high level of stability.

If the cover element 20, as in 2 shown is in the closed operating position, the projection portion 131 engages the Recess 231 in a form-fitting manner, ie in particular completely, so that the cover edge 201 rests on the base edge 101 . The cover side wall 100 and the base side wall 200 thus rest on one another in a form-fitting manner and form a coherent side wall of the fuse switch disconnector 1, preferably with a uniform wall thickness. Furthermore, in 2 shown that the projection portion 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 a maximum height h _D of the lid side wall. The maximum height h _max of the protruding portion 131 is a maximum amount by which the protruding portion 131 protrudes in the Z direction. In particular, the maximum height h _max of the projection element 131 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 in FIG 2 shown, a 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 lid member is in the open position, as in 3 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 from the closed operating position only a little in the direction of the open position, such as e.g. Am 6 shown, the height of the overlap area Ü is between zero and h _max . The fact that 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 a maximum height h _D of the lid side wall thus ensures that there is a sufficient there is a 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 little from the closed operating position in the direction of the open position. The overlap area Ü is described further below, in particular in connection with 7 , described in more detail.

4 and 5 each show a perspective view of the fuse switch disconnector 1 11, in which the first base side wall 100 and the first cover side wall 200 can be seen. In 4 the lid member 20 is in the closed operating position while it is in 5 is in a position between the open and closed operating positions. The base side wall 100 includes five projection portions 131 in this embodiment, and the lid side wall 200 includes five recesses 231. When the lid member 20, as shown in FIG 4 shown is in the closed operating position, each projection portion 131 positively engages a corresponding recess 231 so that the lid edge 201 rests on the base edge 101. The five projection portions 131 are arranged at regular intervals along the base side wall 100 in this embodiment. Furthermore, the five projection portions 132a-e have a substantially identical shape or contour. Specifically, each projection portion 131 has a width in the X direction that decreases along the Z direction. Further, each projection portion 131 has a convex shape. More specifically, in this embodiment, each of the projection portions 131 has a sugar loaf shape. Furthermore, the five projection sections 131 are delimited by a wavy or sinusoidal section of the base edge 101 . Further sections of the base side wall 101, which can be arranged in the positive X-direction and/or in the negative X-direction relative to the projection sections 131, can each be delimited by a straight section of the base edge 101, as shown in FIG 4 and 5 you can see. The five recesses 231 in the side wall of the cover are also delimited by a wavy or sinusoidal section of the edge 201 of the cover. Further sections of the cover side wall 201, which can be arranged in the positive X-direction and/or in the negative X-direction relative to the recesses 231, can each be delimited by a straight section of the cover edge 201, as shown in FIG 4 and 5 you can see. In this embodiment, when the cover member 20 is in the closed operative position, the cover edge 201 fully rests on the base edge 101 such that the fuse switch disconnector is securely closed.

6 FIG. 12 shows another perspective view of the fuse switch disconnector 1 , wherein the cover element has been moved a little, starting from the closed operating position, towards the open position. In this view it can be seen that the projection section 131 is delimited by a section of the base edge 101 provided with a rabbet 133 and the recess 231 is delimited by a section of the cover edge 201 provided with an opposite rabbet 233 . When the cover element 20 is arranged in the closed operating position, the rabbet 133 of the projection section 131 rests against the opposite rabbet 233 of the recess 231, so that a particularly tight closure of the fuse switch disconnector is produced. In addition, 6 It can be seen that when the lid member 20 is moved a little towards the open position from the closed operative position, an opening area between the cover side wall 200 and the base side wall 100 does not extend over an entire width of the fuse switch disconnector 1 in the X direction, but the opening area is interrupted by the projection portion 131 . This makes it more difficult or prevents a user, who first opens the fuse switch disconnector 1 a little, from reaching with his hand or fingers through the opening area into the interior of the fuse switch disconnector 1 while an electric current or an electric voltage is still present in the interior is present.

7 1 schematically shows a section of the base side wall 100 and the cover side wall 200 of the fuse switch disconnector 1 1 , wherein the cover element 20 has been moved a little, starting from the closed operating position, towards the open position. In this arrangement of the lid element 20, each projection section 131 of the base side wall 100 partially engages in a corresponding recess 231 of the lid side wall 200, so that there is an overlap area Ü in the Z direction between the base side wall 100 and the lid side wall 200 gives. Note that the representation from 7 is schematic, in particular because in 7 the lid side wall 200 is shifted relative to the base side wall 100 in the Z direction, while in the embodiment of FIG 1 the cover element 20 is arranged pivotable about an axis of rotation R relative to the base element 10 . The representation off 7 is particularly helpful for understanding the invention, but the effects and advantages described below apply analogously to the case in which z. B. the cover member 20 is arranged relative to the base member 10 about the axis of rotation R pivotable.

In 7 For example, the base side wall 100 includes five projection portions 131 and the lid side wall 200 includes five corresponding recesses 231, as in the case of the first base side wall 100 and the first lid side wall 200, respectively, described above 7 Furthermore, the lid sidewall 200 is spaced from the base sidewall 100 by an amount v in the Z-direction. Therefore, there is an opening area between the base sidewall 100 and the lid sidewall 200, and a height of the opening area in the Z-direction is v. If, as with 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 present invention, the opening area between the base side wall 100 and the cover side wall 200 in the X-direction is limited by the projection portions 131, as will be described later.

In 7 For example, a projection portion 131 has a maximum height h _max in the Z direction and a maximum width b _max in the X direction. Since the projection section 131 engages in a form-fitting manner in a corresponding recess 231 in the closed operating state, the corresponding recess 231 also has a maximum height h _max in the Z direction and a maximum width b _max in the X direction. The base side wall 100 and the cover side wall 200 also 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 h _max of the projection element 131 becomes. More precisely, the height in the Z-direction of the overlap area Ü is equal to the difference between the maximum height h _max of the projection element 131 and the distance v between the base side wall 100 and the cover side wall 200. In the closed operating state, in particular, v is 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, there is an overlap area Ü between the base side wall 100 and the cover side wall 200.

In 7 a width in the X direction of an opening area between the base side wall 100 and the lid side wall 200 within the overlapping area Ü is denoted by a ₁ and a width in the X direction of the opening area outside of the overlapping area Ü is denoted by a ₂ . The width a ₂ is less than or equal to the maximum width b _max of the recess 231, which is equal to the maximum width b _max of the projection element 131. The following therefore applies outside the overlap area Ü: $${\text{a}}_2\le {\text{b}}_{\text{Max}}.$$

The width a ₁ is less than or equal to a half of the maximum width b _max since the width a ₁ occurs on both sides of the projection portion 131 inside the recess 231 . The following therefore applies within the overlap area Ü: $${\text{a}}_1\le 0.5{\text{b}}_{\text{Max}}.$$

Thus, an opening area between the cover side wall 200 and the base side wall 100 does not extend over the entire width of the fuse switch disconnector 1 in the X direction, but is limited by a ₁ or a ₂ . This can prevent the user from getting his hand or fingers through the opening portion between the cover side wall 200 and the base side wall 100 into the inside of the fuse switch disconnector 1, and thereby the safety and user-friendliness of the fuse switch disconnector is further increased .

In a preferred embodiment, each protrusion portion 131 has a maximum height h _max in the Z direction that is greater than or equal to half a maximum width b _max in the X direction of the protrusion portion 131, ie, holds true $$\text{0}{\text{.5 b}}_{\text{Max}}\le {\text{H}}_{\text{Max}}.$$

With the help of the above relation (2), the result within the overlap area Ü is: $${\text{a}}_1\le {\text{H}}_{\text{Max}}.$$

Thus, in this preferred embodiment, the width a ₁ of the opening area in the X-direction within the overlapping area Ü is less than or equal to the maximum height h _max of the projection element 131 or the recess 231. Thus, a width of the opening area between the lid side wall 200 and the base sidewall 100 is effectively constrained in the X-direction. This further increases the safety and user-friendliness of the fuse switch disconnector.

In a particularly preferred embodiment, each protrusion portion 131 has a maximum height h _max in the Z-direction that is greater than or equal to the maximum width b _max in the X-direction of the protrusion portion 131, ie, holds true $${\text{b}}_{\text{Max}}\le {\text{H}}_{\text{Max}}.$$

und mithilfe der obigen Relation (2) ergibt sich innerhalb des Überlappbereichs Ü: $${\text{a}}_1\le 0.5{\text{ h}}_{\text{max}}<{\text{h}}_{\text{max}}.$$

With the help of the above relation (1), outside of the overlap area Ü: $${\text{a}}_2\le {\text{H}}_{\text{Max}},$$

and using relation (2) above, within the overlap area Ü: $${\text{a}}_1\le 0.5{\text{H}}_{\text{Max}}<{\text{H}}_{\text{Max}}.$$

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

In 7 further, 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 that is greater than or equal to half the maximum distance d _max in of the X-direction between two adjacent projecting portions 131, ie, holds $$\text{0}{\text{.5d}}_{\text{Max}}\le {\text{H}}_{\text{Max}}.$$

The maximum height h _max is particularly preferably greater than or equal to the maximum distance d max , ie it applies $${\text{i.e}}_{\text{Max}}\le {\text{H}}_{\text{Max}}.$$

Relations (8) and (9) are analogous to relations (3) and (5) above, respectively. From the relations (8) and (9), the analogous technical effects result from the relations (3) and (5), for the following reasons: As in 7 As can be seen, an area between two adjacent projection sections 131 of the base side wall 100 can also be interpreted as a recess of the base side wall 100, and a section of the cover side wall 200 between two adjacent recesses 231, which respectively correspond to the two adjacent projection elements 131 of the Corresponding base side wall 100 can also be interpreted as a projection element of the lid side wall 200, which corresponds to the recess of the base side wall 100. The maximum distance d _max between the two adjacent projection sections 131 of the base side wall 100 is at the same time the maximum width of the recess in the base side wall 100 between the two adjacent projection sections 131, and this is equal to the maximum width of the projection element of the cover side wall 200 between the two adjacent recesses 231 of the cover side wall 200. Thus, the relations (8) and (9) result in the same effects as in the relations (3) and (5), with only the rollers of base side wall 100 and cover side wall 200 are swapped.

As already mentioned, strictly speaking, the above relations apply when the cover side wall 200 is displaced in the Z direction relative to the base side wall 100, as is shown in FIG 7 is shown schematically. If the cover element is arranged pivotably relative to the base element, as in 1 1, a 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. In this case too, however, analogous relationships apply with regard to horizontal and vertical distances between the base side wall 100 and the cover side wall 200, and in this case too, a width of the opening area between the base side wall 100 and the cover side wall 200 effectively limited by the one or more projection portions 131 as long as there is an overlap area Ü between the base side wall 100 and the lid side wall 200 . Thus, all the technical effects and advantages of the invention described above are also achieved in this case.

8a until 8c each show schematically 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 shows 8a schematically shows 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 sidewall 100 has one or more projection members 131 each protruding in the Z-direction (specifically, relative to a linear portion of the base edge 101), and the lid sidewall 200 has one or more corresponding ones Recesses 231, wherein in the closed operating state each projection section 131 engages in the corresponding recess 131 in a form-fitting manner.

In the second embodiment off 8b the roles of base side wall 100 and cover side wall 200 are reversed, i.e. cover side wall 200 has one or more projection elements 131, each of which protrudes in the opposite Z-direction (in particular relative to a straight section of cover edge 201 ), and the base side wall 100 has one or more corresponding recesses 231, with each projection section 131 positively engaging in the corresponding recess 131 in the closed operating state. All the technical effects and advantages described for the first embodiment are also achieved in this second embodiment.

In the third embodiment off 8c the base side wall 100 has one or more base projection portions 131 protruding in the Z direction (in particular relative to a straight portion of the base edge 101) and one or more base recesses 231. The lid side wall 200 has one or more (in particular relative to a straight section of the lid edge 201, which rests on the straight section of the base edge 101 in the closed operating state) in the opposite Z-direction protruding lid projection sections 131 and a or more cover recesses 231 on. When the lid member 20 is disposed in the closed operative position, each base projection portion 131 engages a corresponding lid recess 231 and each lid projection portion 131 engages a corresponding base recess 231 in a positive manner. All the technical effects and advantages described for the first embodiment are also achieved in the third embodiment.

Furthermore, as already mentioned in connection with 1 mentioned, a fuse switch disconnector 1 according to the invention has a first side wall (ie a first base side wall 100 and a first cover side wall 200) and a second side wall (ie a second base side wall 100 and a second cover side wall 200) which is the first side wall opposite, include. The two side walls can be designed identically, essentially identically or differently. In particular, the first side wall can be one of the 8a until 8c correspond to the first to third embodiments shown, while the second side wall is the same as or different from that shown in FIG 8a until 8c may correspond to the first to third embodiments shown. Further, the one or more protruding portions 131 of the first side wall may be configured identically, substantially identically, or differently to the one or more protruding portions 131 of the second base side wall. The features of the two opposite side walls and their respective projection sections 131 can be varied or combined as desired in order to further improve the safety and user-friendliness of the fuse switch disconnector, depending on the desired application.

The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for the implementation of the invention in the various configurations.

Reference List

1

fuse switch disconnector

10

base element

20

cover element

30

hook part

90

contact sword

100

base side panel

101

base edge

131

head Start

133

shiplap

200

lid side panel

201

cover edge

231

recess

233

Opposite shiplap

R

Lid rotation axis

hD

maximum height of the cover element

hmax

maximum height of a projection section

b max

maximum width of a projection portion

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

a1

Width of an opening area within the overlap area Ü

a2

Width of an opening area outside the overlap area Ü

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2584577 B1 [0002]
• EP 3016122 A1 [0002]

Claims (14)

Fuse switch-disconnector (1), which includes: a base member (10) and a lid member (20), the lid member (20) being reciprocably disposed relative to the base member (10) between an open position and a closed operative position; wherein the base element (10) comprises a base side wall (100) which is arranged parallel to an X-direction and a Z-direction, the Z-direction being perpendicular to the X-direction, the base side wall (100 ) is bounded in the Z-direction by a base edge (101); wherein the lid element (20) comprises a lid side wall (200) which is arranged parallel to the X-direction and the Z-direction, the lid side wall (200) being in a direction opposite to the Z-direction by a lid edge (201) is limited; wherein the base side wall (100) has one or more projection portions (131) protruding in the Z direction and the lid side wall (200) has one or more recesses (231); and wherein when the lid member (20) is disposed in the closed operative position, each projection portion (131) of the one or more projection portions (131) positively engages a corresponding recess (231) of the one or more recesses (231) such that the lid edge (201) rests on the base edge (101). Fuse switch disconnector (1) after claim 1 , wherein the lid element (20) is attached to the base element (10) and is arranged to be pivotable relative to the base element (10) between the open position and the closed operating position about a lid axis of rotation (R), the lid axis of rotation (R ) is arranged perpendicular to the X-direction and perpendicular to the Z-direction. A fuse switch disconnector (1) according to any one of the preceding claims, wherein each projection portion (131) of the one or more projection portions (131) has a width in the X-direction that decreases along the Z-direction. A fuse switch disconnector (1) according to any one of the preceding claims, wherein each projection portion (131) of the one or more projection portions (131) has a convex shape. Fuse switch disconnector (1) according to one of the preceding claims, wherein each projection section (131) of the one or more projection sections (131) has a rectangular shape, a trapezoidal shape or a triangular shape, each preferably with rounded corners, or a bell shape or a sugar loaf shape. A fuse switch disconnector (1) according to any one of the preceding claims, wherein the base side wall (100) has a plurality of projecting portions (131) arranged at regular intervals along the X-direction, preferably wherein the plurality of projecting portions (131) have an identical have shape or contour. 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 projection sections (131). A fuse switch disconnector (1) according to any one of the preceding claims, wherein the base sidewall (100) has a plurality of boss portions (131), the plurality of boss portions (131) being bounded by a wavy or sinusoidal portion of the base edge (101). . Fuse switch disconnector (1) according to one of the preceding claims, wherein the one or more projection sections (131) are each delimited by a section of the base edge (101) provided with a shiplap (133) and the one or more recesses (231) are each delimited by a portion of the lid edge (201) provided with an opposite shiplap (233) such that the shiplap (133) of each projection portion (131) rests against the opposite shiplap (233) of the corresponding recess (231) when the lid member (20) is located in the closed operative position. A fuse switch disconnector (1) according to any one of the preceding claims, wherein each projection portion (131) has a maximum height (h _max ) in the Z direction that is greater than or equal to half a maximum width (b _max ) in the X direction of the projection portion (131), wherein preferably the maximum height (h _max ) is greater than or equal to the maximum width (b _max ). A fuse switch disconnector (1) according to any one of the preceding claims, wherein each projection portion (131) has a maximum height (h _max ) in the Z-direction greater than or equal to half a maximum distance (d _max ) in the X-direction between two adjacent projection portions (131), wherein preferably the maximum height (h _max ) is greater than or equal to the maximum distance (d _max ). Fuse switch disconnector (1) according to any one of the preceding claims, wherein each projection portion (131) has a maximum height (h _max ) in the Z direction which is greater than or equal to one third, preferably one half or two thirds of a maximum height (h _D ) the lid side wall (200). Fuse switch disconnector (1) according to one of the preceding claims, wherein the one or more projection elements (131) are designed and dimensioned in such a way that they form a contact area between a receiving unit of the base element (10) and a contact sword (90) of a at least partially cover the fuse link used. Fuse switch-disconnector (1), which includes: a base member (10) and a lid member (20), the lid member (20) being reciprocably disposed relative to the base member (10) between an open position and a closed operative position; wherein the base element (10) comprises a base side wall (100) which is arranged parallel to an X-direction and a Z-direction, the Z-direction being perpendicular to the X-direction, the base side wall (100 ) is bounded in the Z-direction by a base edge (101); wherein the lid element (20) comprises a lid side wall (200) which is arranged parallel to the X-direction and the Z-direction, the lid side wall (200) being in a direction opposite to the Z-direction by a lid edge (201) is limited; wherein the lid side wall (200) has one or more projection portions (131) protruding in the opposite Z-direction and the base side wall (100) has one or more recesses (231); and wherein when the lid member (20) is disposed in the closed operative position, each projection portion (131) of the one or more projection portions (131) positively engages a corresponding recess (231) of the one or more recesses (231) such that the lid edge (201) rests on the base edge (101).

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