EP1993116A1 - Power switch block with fuses - Google Patents

Abstract

The power switch block has a lower section and an upper section (3), where the upper section has an adjustable switching cover (4). A mounting unit is provided in the upper section for attaching the upper section with the lower section. An opening (6) is provided at each mounting unit on the switching cover. The switching cover is arranged with an opening in longitudinal direction (L1) of the power switch block between a primary safety device measurer of a primary protection unit and a secondary safety device measurer of a secondary protection unit.

Description

TECHNICAL AREA

The present invention relates to a fastening device of a fuse load switching strip, in particular a NH fuse load switching strip, for fastening the upper part to the lower part. It is a load switch bar with a lower part with connections for busbars and / or cables, with an attachable to the lower part upper part, an attachable to the upper part switch cover having at least one support for at least one fuse on its underside, and an am Switch cover, if necessary movably mounted shift lever to raise the switch cover. The present invention is suitable for a fuse load switch bar having one or more switch lids which substantially completely cover or cover the top, except for any small slots between the switch lids in the case of a plurality of longitudinally serially arranged switch lids.

STATE OF THE ART

Switch-disconnectors are used to connect and disconnect connections on busbars via special fuses. For this purpose, so-called NH fuse-links, which are arranged in such Lastschaltleisten provided, which serve to protect the connected circuits. Such a load switch bar is eg in the EP-A-0 563 530 described. In this load switch bar, which has a housing with connections for busbars, three NH fuses, which are held on fastening devices on a switch cover, used in contact devices in the housing, respectively. taken from these. The switch cover has an elongated shape, since the fuses are arranged one behind the other along a longitudinal axis. The switch cover has a shift lever which is rotatably mounted about an axis, and which allows to move the actual shift cover in a direction transverse to the longitudinal axis of the load selector. These are in the housing and the switch cover guide webs resp. Recesses provided which allow only this transverse movement. In other words, in this construction, the entirety of the NH fuses at a removal from the contact devices in the housing from the housing simultaneously moved out parallel. Alternative designs are known in which the individual or all fuses are removed in a tilting movement of the contact devices, in this case, the contact devices during the removal process are separated in time separated resp. contacted during insertion.

To mount a NH fuse-switch-disconnector to a busbar system with screws, the upper part of the fuse-switch-disconnector must often be removed. In other cases, in particular in the case of the load-limiting strips described above, in which the switch cover must be lifted parallel to the surface of the upper part, at least the switch cover and the busbar cover must be opened. For example, with NH fuse-switch disconnectors, three fuse-links are switched simultaneously. But there are also fuse switch disconnectors with a cover per fuse. In such cases, even more switch covers must be removed to ensure access to the screws. In general, several handles are required for optimum accessibility when mounting on busbars or to convert the fuse switch disconnector from "outlet down" to "outlet top" or vice versa, since the top and / or the at least one switch cover must be removed. In some cases, the screws are already accessible with the cover open or removed, but not optimally. In many common embodiments, the upper part is attached to the lower part by means of three to six mostly mounted in the upper part bars, which must be rotated by a screwdriver by 45-90 degrees, so that the upper part can be removed from the lower part. A distance of Upper part is necessary if, for example, from "Departure below" to "Departure above" or vice versa must be rebuilt. The upper part or the switch cover must also be removed for mounting on busbars. Thus, for mounting the Sicherungsgslastschaltleisten on busbars first, the switch cover must be removed or at least raised to get to the bolt with the screwdriver and rotate them. Subsequently, the at least one cover must often be replaced so that the upper part can be removed from the lower part. In some cases, when converting from "downstairs down" to "downstairs" or vice versa, even additional anti-shock devices have to be removed and, vice versa, reinstalled. A total of at least nine, in some designs, depending on the number of fuses and switch covers even up to twelve handles needed to remove the upper part of the fuse switch disconnector.

PRESENTATION OF THE INVENTION

The invention is therefore an object of the invention to provide a structurally simple, device available, which allows the installation of fuse load switch strips on busbars and their conversion with minimal effort, in particular without the switch cover must be removed.

The solution to this problem is achieved in that in a fuse load switching strip, such as a NH-fuse switch, via the mounted in the upper part bars for attaching the upper part of the lower part openings in the switch cover or between the switch covers are arranged, which access to the bars or Allow screws without opening or removing the switch cover. In this way, the upper part can be removed together with the closed switching lids from the lower part. Also, when converting from "outlet down" to "outlet above" or vice versa no additional handles must be exercised, except that the base must be mounted in the correct position on the busbar. By the invention it is achieved that the user in the Mounting the NH fuse switch disconnector can benefit from strong cost savings.

According to a first embodiment, a fuse load switching strip is provided, which has a lower part and an upper part attachable thereto and at least one attachable to the upper part switching lid. In this case, fastening means for fastening the upper part are mounted on the lower part in the upper part. Above each fastening means, an opening is arranged in the switch cover, through which the fastening means for a tool, in particular a screwdriver, is accessible. In the case of a load switch bar with a plurality of longitudinally juxtaposed switching lids, an opening consists of recesses of both adjacent switching lid, i. Both recesses together form an opening, the fuse load switching strip is preferably a NH fuse load switching strip, in particular preferably a NH fuse load switching strip size DIN00, DIN1, DIN2, or DIN3.

Openings in the switch cover are known from the prior art, but these fulfill a different purpose and can not be used for the inventive purpose. For example, there are holes that allow access to the contact tulips for contact verification or voltage measurement. But these holes go on the conductors. A contact of a conductor with the tool but should be avoided if possible. In addition, viewing windows are known, which provide an insight on the backups, and from the DE 101 59 739 A1 a viewing window for reading an identification element is known.

It is a challenge to find a location in the switch cover on which an opening can be located. At the same time, touching or accessing the ladder should be avoided to minimize the safety risk.

The essence of the invention thus consists in that the fastening device of the upper part is made operable on the lower part from the outside.

According to a first preferred embodiment, the at least one opening is arranged centrally with respect to a width of the switching lid.

According to a further preferred embodiment, when the switch cover is placed on the upper part or closed, the at least one opening in the direction of a longitudinal axis of the fuse load switch strip between a first safety knife a first fuse and a second safety knife a second fuse of Sicherungslastschaltleiste angeordet. The fuses, which protrude generally projecting from the underside of the switch cover in the upper part, are arranged according to this embodiment in alignment with the longitudinal axis, preferably centrally with respect to the width of the switch cover. The openings are preferably centered in the transverse direction with respect to the width of the switch cover, as well as centered in the longitudinal direction with respect to two adjacent fuses.

When you press the fuse is usually not used. Alternatively, therefore, the opening in the lid may also be located above a location located in the direction of the longitudinal axis of the fuse load switch bar between the two fuse blades of the same fuse, the fastener is then disposed below the fuse and with the opening in a direction perpendicular to Switch cover surface is aligned. In such a case, the switch cover has no or at most a short, adjacent to the opening guide sleeve.

According to a further preferred embodiment according to the invention, the opening has an alignment in a direction perpendicular to the surface of the switching cover to the fastening means out. Looking from above vertically on the switch cover and through the opening arranged there, so you can see the head of the fastener.

Preferably, the fastening means is a rotary bolt or a screw. In particular, when the fastener is a rotary latch, it can be secured to the base by rotation preferably less than 180 degrees, preferably less than 90 degrees. It is conceivable, for example, a bayonet closure mechanism. It would also be possible for the fastening means to have an area with and a region without a thread, and thus to act only in certain areas as a screw, for example for the engagement or the holder in the lower part.

The fastening means may be self-locking in the upper part and / or fixed in the lower part. Even after attachment or latching, it is possible that the fastening means under certain circumstances, at least within certain limits is still rotatable. As already mentioned above, a bayonet lock mechanism would be applicable here, for example.

According to a further preferred embodiment, the fastening means has a guide body and in an upper region a head, wherein the head has at least one engagement opening for a tool. As an intervention opening in the head, for example, a cross-shaped engagement opening or an engagement opening for an Allen key or a regular slot for a conventional screwdriver would be conceivable. As an alternative to an engagement opening, the head can also have a wrap-around contour, which makes it possible to operate the attachment means with a encompassing tool. It is advantageous if the head has a larger diameter than the guide body or the neck. If the fastener is held in the upper part, then the underside of the head rests on a step or a shoulder of the upper part. The guide body can be open at the bottom and hollow inside. Preferably, it additionally has an im Essentially cylindrical neck and at least two thighs on. If legs are present, the individual legs are preferably separated from each other by slots. In this case, the legs down, pointing to the lower part, be designed to be spreading. The slots may be V-shaped, with the slot being wider in its lower portion than in the upper portion closer to the head. The slots can also have parallel sides or flanks.

According to a further possible inventive embodiment, the fastening means in a first region at least a first means which is suitable for holding the fastening means in or on the upper part, wherein the upper part has at least one undercut or a recess for receiving the at least one first means. In this case, the fastening means in the holding state in the upper part is substantially freely rotatably mounted at least within certain limits. Said first means may for example be a latching lug, a tongue or a cam, which can each insert into the upper part, or in the undercut or (self-) can be latched under a projection of the upper part. For example, the guide body may have below its neck cams, which protrude in a wedge shape from the mantle surface of the cylinder of the neck. These cams are used to entangle or the holder of the fastener in the upper part.

According to a further preferred embodiment, the fastening means in a second region at least a second means, preferably a nose, a tongue, a cam, a rib or a thread or a threaded portion, which is suitable for holding the fastening means in or on the lower part. The lower, the lower part facing region of the fastener, ie in the presence of a neck, for example, the region of the guide body below the neck, for example, two legs, each with a nose preferably at its lower, the lower part facing end, whereby the fastener bayonet-like fastened in the lower part would be. The said lower region of the fastening means may alternatively or additionally also have a thread which can be screwed into a correspondingly corresponding internal thread in the lower part, possibly also partially in the upper part. In the case of the at least sectional configuration of the fastener as a screw nose may no longer be necessary because the fastener instead of means of a bayonet lock mechanism thus by means of a Schraubverschlussmechanismus on the lower part can be fastened.

According to a further preferred embodiment, the fastening means has at least one axial slot. The slot gives the fastener a degree of flexibility with respect to the diameter of its guide body. Such a slot is particularly advantageous if the guide body is hollow inside. The fastener may also at least partially, preferably in a region facing the lower part, in particular preferably downwardly conically formed, before insertion through the fastener through the opening and after actuation of the fastener by the tool, or if that Upper part is attached to the lower part. If the fastening means has a conical shape, then the cone, which has a larger diameter in its lower region than in its upper, head-facing region, can be reduced to a uniform diameter, which is substantially equal to the diameter of the Head corresponds and thus smaller than the opening, compress, with the guide body of the fastener when snapped in the upper part and / or lower part relaxed again, so that the fastening means is again conical in its inserted or locked position. If the lower part can be fastened by a screw cap, no conical structure of the guide body is necessary.

According to another preferred embodiment, below the opening is a Guiding sleeve arranged, wherein the guide sleeve is mounted in the switch cover and / or in the upper part or is formed in / on the switch cover or in / on the upper part. It can either be mounted or fastened on the underside of the switch cover, or for example even on the edge of the opening and / or in the upper part. The guide sleeve is aligned from the opening in the switch cover to the fastener. It is preferably formed with its longitudinal axis substantially perpendicular to the shift lid surface and thus envelops the perpendicular to the shift lid surface extending alignment of the opening to the fastener. But it is also possible that, for structural reasons, when the fastening means is not arranged perpendicular to the longitudinal axis of the load switch bar, but angled thereto, the guide sleeve also leads in an angled direction relative to the Schaltdeckeloberfläche of the opening to the fastener down.

The guide sleeve has a diameter which is less than or equal to the diameter of the opening but has a larger diameter than the tool to be used for actuating the fastener and to be inserted through the opening. The opening has a diameter of at least 3-4 mm and a maximum of 15 mm, preferably a maximum of 10 mm. Preferably, when the switch cover is placed on the upper part, the guide sleeve at least partially encloses the distance between the opening and the fastening means. When the switch cover is closed, the guide sleeve thus maximally has the length of the distance between the opening and the head of the fastening means.

The purpose of the guide sleeve is on the one hand, that a user when inserting a tool for actuating the fastener, eg in the case of a rotary bolt or a screw to its rotation by a certain angle, not the way to the fastener search or must feel, but that the guide sleeve the tool passes directly to the head of the fastening device. Since the sleeve prevents the tool from tilting during insertion, it additionally protects the user of the tool against unwanted, possibly dangerous, contact with the tool Contacts or ladders. The guide sleeve, which may be formed in one piece or several pieces, may be formed continuously up to the head of the fastener. However, it is also conceivable that the sleeve covers only part of the distance between the opening and fastening means.

According to a further preferred embodiment of the invention, a guide opening for introducing a means, in particular a screw, for fastening the lower part to a holder is additionally arranged colinearly with the longitudinal axis of the fastening means below the fastening means. This guide opening is arranged between two contact tulip covers.

The fuse load switching strip has according to a further preferred embodiment, three arranged in alignment along the longitudinal axis fuses. According to this preferred embodiment, the switch cover has two openings, one of which is located centrally between the first and the second fuse, and the other opening between the second and the third fuse in the switch cover. The switch cover is suitable according to this preferred embodiment for receiving three NH fuses, all of which can be removed from their contacts substantially simultaneously by movement of the switch cover. In this case, the three NH fuses are preferably arranged in alignment in their longitudinal direction in a row. The guide sleeve is arranged with inserted fuses between two contact blades respectively an associated contact tulip of the middle of the three NH fuses.

Alternatively, a further fuse load switch strip according to the invention has three fuses arranged in alignment along the longitudinal axis, one switch cover being provided per fuse. In this case, the group of switching lids has two openings, of which one opening is partially disposed in the first and partly in the second switching lid and the other opening partially in the second and partially is arranged in the third switch cover. When each of the three aligned in line fuses has its own switching lid and between two adjacent switching lids each have an opening, each switching lid has at the edge adjacent to the adjacent switching lid has a recess which constitutes half of this opening, or a longitudinal half of a guide sleeve. The transverse wall of a switch cover thus forms one half of the wall of the guide sleeve, wherein the adjacent transverse wall of the adjacent switch cover forms the other half of the wall of the guide sleeve. Each shift cover thus has a recess on at least one side wall facing the adjacent shift cover, wherein a first opening with guide sleeve is formed from the juxtaposition of the recesses of the first and second shift cover and a second opening from the juxtaposition of the recesses of the second and third shift cover is formed with guide sleeve. It follows that below each opening, the wall of the guide sleeve is formed from areas of the side walls of both adjacent switching cover.

The switch cover of the fuse load switch strip according to the invention can be either of the parallel type or of the tilt type, i. either be placed in parallel on the upper part and be raised, or be up and tipped off.

Further preferred embodiments of the invention are described in the dependent claims.

BRIEF EXPLANATION OF THE FIGURES

• Fig. 1 eine perspektivische Ansicht einer Lastschaltleiste gemäss einer bevorzugten Ausführungsform der Erfindung in offener Position;
• Fig. 2 einen Längsschnitt durch eine Lastschaltleiste senkrecht zur Oberfläche des Schaltdeckels im offenen Zustand;
• Fig. 3 einen mittigen Längsschnitt durch den Basiskörper, d.h. durch das Unterteil der Sicherungslastschaltleiste;
• Fig. 4 einen mittigen Teilschnitt durch den Basiskörper bzw. das Unterteil von Fig. 3 in Detailansicht;
• Fig. 5 einen mittigen Längsschnitt durch eine Lastschaltleiste ohne Schaltdeckel, wobei das Oberteil auf dem Unterteil bzw. Basiskörper aufgesetzt ist;
• Fig. 6 einen mittigen Teilschnitt durch die Längsachse der Lastschaltleiste von Fig. 5 in Detailansicht;
• Fig. 7 eine perspektivische Ansicht eines Befestigungsmittels gemäss einer bevorzugten Ausführungsform;
• Fig. 8 einen mittigen Schnitt durch eine geschlossene Lastschaltleiste, wobei das Oberteil auf dem Unterteil bzw. Basiskörper aufgesetzt ist und der Schaltdeckel auf dem Oberteil montiert ist;
• Fig. 9 einen mittigen Teilschnitt durch die Lastschaltleiste von Fig. 8 in Detailansicht;
• Fig. 10 eine perspektivische Ansicht eines mittigen Schnittes durch die Lastschaltleiste von Fig. 8;
• Fig. 11 eine perspektivische Ansicht des mittigen Teilschnittes durch die Lastschaltleiste von Fig. 8 in Detailansicht;
• Fig. 12 eine perspektivische Ansicht eines Teils eines Sicherungslasttrennschalter-deckels, der zu einer NH-Sicherungslastschaltleiste der Baugrösse DIN00, DIN1, DIN2 oder DIN3 mit drei in einer Linie fluchtenden Sicherungen gehört, von denen jede Sicherung einen eigenen Schaltdeckel aufweist;
• Fig. 13 eine perspektivische Ansicht einer NH-Sicherungslastschaltleiste der Baugrösse DIN00, DIN1, DIN2 oder DIN3 mit drei Schaltdeckeln, aufweisend drei in einer Linie fluchtende Sicherungen.

The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Show it:

• Fig. 1 a perspective view of a load switch bar according to a preferred embodiment of the invention in an open position;
• Fig. 2 a longitudinal section through a load switch bar perpendicular to the surface of the switch cover in the open state;
• Fig. 3 a central longitudinal section through the base body, ie through the lower part of the fuse load switching strip;
• Fig. 4 a central partial section through the base body or the lower part of Fig. 3 in detail view;
• Fig. 5 a central longitudinal section through a load switch bar without switch cover, wherein the upper part is placed on the lower part or base body;
• Fig. 6 a central partial section through the longitudinal axis of the load switch bar of Fig. 5 in detail view;
• Fig. 7 a perspective view of a fastening means according to a preferred embodiment;
• Fig. 8 a central section through a closed load switch bar, wherein the upper part is placed on the lower part or base body and the switch cover is mounted on the upper part;
• Fig. 9 a central partial section through the load switch bar of Fig. 8 in Detailed view;
• Fig. 10 a perspective view of a central section through the load switch bar of Fig. 8 ;
• Fig. 11 a perspective view of the central partial section through the load switch bar of Fig. 8 in detail view;
• Fig. 12 a perspective view of a part of a fuse switch disconnector cover, which belongs to a DIN fuse switch disconnector strip size DIN00, DIN1, DIN2 or DIN3 with three aligned in a line fuses, each of which has its own safety cover switch;
• Fig. 13 a perspective view of a NH fuse-switch-disconnector bar size DIN00, DIN1, DIN2 or DIN3 with three switch covers, comprising three aligned in a line fuses.

WAYS FOR CARRYING OUT THE INVENTION

In FIG. 1 is a Sicherungslastschaltleiste 1 shown with raised lever 5. The NH fuse-switch-disconnector 1 shown here consists essentially of a lower part 2, a top part 3, a switch cover 4 and a shift lever 5. The fuse load switch bar has a longitudinal direction L1 and a transverse direction Q, attached to the underside of the switch cover 4 (n) Fuse (s) and their two-sided knife are not shown here. It is according to the invention but also fuse load switch strips 1 possible, which have more than one switch cover 4. In such cases, the openings between the Switch covers arranged (see Fig. 12 and 13 ).

In FIG. 1 is the shift lever 5, and with it also the shift cover 4, in the raised, ie shown in the open position. On, respectively in the switch cover surface 27, an opening 6 is shown, which allows the access of a tool to a fastening means 7 for fixing the upper part 3 on the lower part 2. This opening 6 is preferably arranged centrally in the switch cover surface 27. This means that the opening 6 is preferably arranged centrally in the switch cover surface 27 with respect to the width B of the switch cover. This position is particularly preferred because the opening between two safety knife (not shown) comes to rest. An attached below the opening 6 on the switch cover 4 and / or on the upper part 3 or integrally formed on the switch cover 4 guide sleeve 16 can thus the distance A (see. Fig. 11 ) between the opening 6 and the fastening means 7, or its head 10 at least partially enclose, without getting in the way of other components. Such an arrangement of the opening 6 or the guide sleeve 16, which has a cross section in the form of the opening is preferred, so that the fastening means 7 of the switching surface without disassembly of the switch cover 4 and / or the upper part 3 for a tool, in particular accessible to a screwdriver.

In FIG. 2 is visible that the guide sleeve 16, or the distance A (see. Fig. 11 ) is formed between the opening 6 and the head 10 of the fastening means 7 substantially perpendicular to the switch cover surface. It is also conceivable that the route could be arranged angled to the shift lid surface. In FIG. 2 the guide sleeve 16 is formed only on the switch cover 4, so to speak protruding from its underside. The guide sleeve 16 is not continuous here to the head 10 of the fastener 7, since the switch cover 4 is open. However, it would be conceivable that the guide sleeve 16 is formed from a first part which is integrally formed on the switch cover 4 and a second part coaxial with the first part, which is integrally formed or attached to the upper part 3. The fastener has a longitudinal axis L2, which is arranged coaxially with the guide sleeve 16 according to the illustrated preferred embodiment. In FIG. 2 is visible, as the fastening means 7, and thus also the openings 6 in each case between two adjacent covers 18 for contact tulips 29 (in FIG. 5 shown), which are mounted in pairs in the lower part 2, are arranged. The covers 18 may be arranged or fastened either on the lower part 2 or on the upper part 3. When mounting the switch cover 4, the fuses (not shown) attached to the underside of the switch cover 4 are inserted into the contact tulip covers 18 with the knives (not shown) projecting from the fuses on both sides in the longitudinal direction L1 in guides 20 arranged on both sides of the fuse.

FIG. 3 shows a section through a lower part 2 of a fuse load switching strip 1 without ladder and contact tulips. In the figure, two guide openings 15 are shown, in each of which a fastening means for the attachment of the lower part 2 to a holder (not shown) can be inserted. On both sides of the guide opening 15 for the said fastening means for the attachment of the lower part 2 to a holder each have a mounting platform 26 is provided for a busbar connection 17. These structures are FIG. 4 as a detail from FIG. 3 shown enlarged.

FIG. 5 shows a longitudinal section through a fuse load switchbar 1. However, here only the lower part 2 and the upper part 3 mounted thereon are shown. Both the switch cover and the shift lever are missing in the presentation. In this figure, the course of the three illustrated busbar connections 17 in the lower part 2 can be seen. The contact tulip covers 18 with their guides 20, of which in this FIG. 5 Six pieces are shown are arranged in pairs. In the in FIG. 5 illustrated preferred embodiment, the fastening means 7 is arranged collinearly above the guide opening 15 for the fastening means for fixing the lower part 2 to a holder. The longitudinal axis L2 of the fastening means 7 for fastening the upper part 3 on the lower part 2 and the longitudinal axis L2 of the Fastening means, which serves the attachment of the lower part 2 to a holder (not shown), or the guide opening 15 thus preferably coincide.

In FIG. 6 is a detail of FIG. 5 shown in the region of the fastening means 7. The fastening means 7 is held locked in accordance with the illustrated preferred embodiment both in the upper part 3 and in the lower part 2. The lower part 2 has on both sides of the guide sleeve 16 and the opening 6 for the fastening means 7 projections 14. The projections 14 have according to the illustrated embodiment, radially inward, ie towards the opening 6 for the fastening means 7, or to the fastening means 7 used and are preferably beveled in the direction of insertion for the fastening means 7. The fastening means 7, which has a guide body 8, a head 10 with engagement opening 13 and according to the illustrated embodiment, two preferably beveled in the insertion direction lugs 9, snaps in the introduction of the fastener 7 through the opening 6 with its lugs 9 below the two projections shown 14 so in the lower part 2 that the fastening means 7 is prevented from moving upwards, ie back to the opening 6 back. The lugs 9 are preferably formed only in a certain peripheral region of the lower region of the fastening means 7. As an alternative to the self-locking mechanism, it is also possible for the fastening means 7 to be inserted in the open position through the opening 6 and then rotated clockwise by about 90 degrees. Turning the fastener 7 by about 90 degrees counterclockwise, the lugs 9 are released, ie they pass under the projection 14 into a free area 28 (see Fig. 4 ), and the fastening means 7 can be removed from the opening 6 again. The rotation of the fastener 7 is done by means of a tool, preferably a hand tool, particularly preferably a screwdriver. The latching of the fastening means 7 in the upper part 3 is achieved by the two illustrated cams 11, which engage in undercuts 25 in the upper part. The cams 11 are located as along the longitudinal axis L2 of the fastener 7 conical structures which increase the radius of the fastener 7 in an area closer to the head 10. Said structures 11 converge again in a region closer to the foot of the fastening means 7 with the guide body 8 of the fastening means 7. In the illustrated preferred embodiment, the fastening means 7 is designed as a rotary latch. The rotary latch 7 shown here has two legs 12, which are separated by a slot 22 on each of its two sides. It is also possible that the rotary latch or the fastening means 7 has a guide body which has more than two legs. In the illustrated embodiment, the guide body 8 of the fastening means 7 is hollow, which leads to a spreadability of the fastening means 7 in the lower part 2. It is also possible that the fastening means 7 has a fully cylindrical guide body 8. At the end of the illustrated legs 12, at least one preferably bevelled nose 9 in the insertion direction is formed, which, as already mentioned, engages under the projections 14 in the upper part 3.

This in FIG. 7 illustrated embodiment, a fastening means 7 in the form of a rotary bolt. The fastening means 7 shown here comprises a guide body 8 which is open according to this embodiment downwardly and hollow inside, represented by cavity 21, and a head 10 with at least one engagement opening 13 for a tool, and a neck 23 and two legs 12 has. The legs 12 are separated by two opposing slots 22. These slots 22 may be V-shaped, as in FIG FIG. 7 represented, or form slots, which have parallel sides or flanks. The guide body 8 has below its in the figure shown substantially cylindrical neck 23 on both sides of each slot 22 each have a cam 11 which projects in a wedge shape from the mantle surface of the cylinder of the neck 23. The illustrated embodiment thus has four cams 11 as a whole. These cams 11 serve the entanglement or the rotational support of the Fastener 7 in the upper part 3. The engagement opening 13 in the head 10 of the fastener 7 is in the FIG. 7 shown crosswise, ie for a Phillips screwdriver / -dreher. It would also be conceivable, however, an engagement opening for an Allen wrench or a regular slot for a conventional screwdriver. In the illustrated embodiment, the lower part of the fastening means 7, ie the part of the guide body 8 below the neck 23, two legs 12, each with a nose 9. The illustrated rotary latch is thus fastened like a bayonet in the lower part. The said lower part of the fastening means 7 but could also have a thread, which could be in a corresponding corresponding thread in the lower part 3, possibly also partially in the upper part, screwed. In the case of the at least sectional configuration of the fastening means 7 as a screw noses 9 would be necessary under certain circumstances, since the fastening means 7 instead of means of a bayonet lock mechanism 'thus by means of a Schraubverschlussmechanismus' on the lower part would be fastened.

In FIG. 8 is a Sicherungslastschaltleiste 1 in the longitudinal direction L1 central section shown. In this embodiment, the load switch bar 1 has both a lower part 2 and a top part 3, as well as a switch cover 4 and an attached thereto, in the figure in the folded, ie closed position shown shift lever 5. The longitudinal section divides the load switch bar by the aligned fixing means 7 and their guide sleeves 16 in two halves. Preferably, the fastening means 7 are arranged centrally in an alignment in the longitudinal direction L1. The left of the two fasteners in the figure is in removal position, about 90 degrees twisted to that in the FIG. 8 shown on the right fastening means 7. The left of the two fastening means 7 is shown in the unlocked position, however, for the complete lifting of the upper part 3 from the lower part 2, the unlocking of the fastening means 7 shown on the right is necessary. The right of the two fastening means 7 shown here is shown in the locked position, ie in the fastening position. The lugs 9 are hooked under the projections 14 of the lower part 3, and the cams 11 in the undercuts 25th of the top. In FIG. 9 is the right of the two in FIG. 8 shown fastening means in its hooked holder shown in detail.

In FIG. 10 is a perspective view of a half of a longitudinally L1 centrally divided fuse load switchbar 1. Here is particularly clearly visible that the two openings 6 shown are halved by a central longitudinal pitch of the load selector 1, which allows an insight into the guide sleeve 16 shown here, which is extends according to the illustrated embodiment, with the switch cover 4 closed substantially from the opening 6 to the head 10 of the fastener 7. The guide sleeve 16 is integrally formed here on the shift cover 4. However, it would also be conceivable that the switching cover 4 has only one opening 6, and that the upper part 3 has a guide sleeve 16, or that the guide sleeve 16 could be formed on the upper part 3, which is arranged above the fastening means 7. In the illustrated embodiment, the guide sleeve 16 is formed coaxially with the guide opening 15 for the attachment of the lower part 2 to a holder (not shown). FIG. 11 shows a detail of the representation of FIG. 9 in the region of the right fastening means 7 of FIG. 10 ,

FIG. 12 Fig. 3 illustrates a perspective view of a portion of a shift cover 4. The illustrated embodiment of the invention is applied to fuse load shift rails 1 having a plurality of shift lids 4 arranged in alignment with the longitudinal axis. The inventive opening 6 is located in such Sicherungslastschaltleisten 1 with multiple covers each between two adjacent switching lids 4. Each transverse wall 24 thus has a recess in the form of a half opening 6, which together with the adjacent switching lid together a complete opening 6 results in use arrangement. In this embodiment, the guide sleeve 16 is formed by the juxtaposition of the two recesses in the transverse walls 24 of the two adjacent switching cover 4.

In FIG. 13 is a fuse load switchbar 1 after FIG. 12 shown in perspective view. In the FIG. 13 shown load switch bar has a lower part 2, an upper part 3, and three shift cover 4, each of which has its own shift lever 5. Depending on an axially centrally disposed opening 6 is shown between the first and the second shift cover 4 and between the second and the third shift cover 4 on the surface thereof.

LIST OF REFERENCE NUMBERS

1

Sicherungslastschaltleiste

2

Unterteil

3

Oberteil

4

Schaltdeckel

5

Schalthebel

6

Öffnung

7

Befestigungsmittel

8

Führungskörper von 7

9

Nase von 7

10

Kopf von 7

11

Nocken von 7

12

Schenkel von 7

13

Eingriffsöffnung von 7

14

Vorsprung in 2

15

Führungsöffnung zur Befestigung von 2 an einer Halterung

16

Führungshülse für Werkzeug

17

Sammelschienenanschluss

18

Kontakttulpenabdeckung

19

Anschlussklemmen

20

Führung in 18 für Sicherungsmesser

21

Hohlraum

22

Schlitz in 8

23

Hals von 7

24

Querwand

25

Hinterschnitt in 3 für 11

26

Befestigungsplattform für 17

27

Oberfläche von 4

28

freier Bereich in 2

29

Kontakttulpe

A

Abstand zwischen 6 und 10

B

Breite von 4

D 1

Durchmesser von 6

D2

Durchmesser von 10

D3

Durchmesser von 23

L1

Längsrichtung von 1-4

L2

Längsachse von 6

Q

Querrichtung von 1-4

2

1

Fuse switch disconnectors

2

lower part

3

top

4

switch cover

5

gear lever

6

opening

7

fastener

8th

Guide body of 7

9

Nose of 7

10

Head of 7

11

Cam of 7

12

Thighs of 7

13

Engaging opening of 7

14

Advantage in 2

15

Guide opening for mounting 2 to a bracket

16

Guide sleeve for tool

17

Busbar connection

18

Contact Tulips cover

19

terminals

20

Guide in 18 for safety knife

21

cavity

22

Slot in 8

23

Neck of 7

24

partition

25

Undercut in 3 for 11

26

Mounting platform for 17

27

Surface of 4

28

free area in 2

29

Contact tulip

A

Distance between 6 and 10

B

Width of 4

D 1

Diameter of 6

D2

Diameter of 10

D3

Diameter of 23

L1

Lengthwise from 1-4

L2

Longitudinal axis of 6

Q

Transverse direction of 1-4

2

Claims (19)

Fuse switch disconnector (1), in particular an NH fuse switch disconnector, with a lower part (2) and an upper part (3) attachable thereto and at least one switch cover (4) which can be placed on the upper part (3), wherein fastening means (7) are provided in the upper part (3) for fastening the upper part (3) are mounted on the lower part (2),
characterized in that
over each fastening means (7) in the switch cover (4) at least one opening (6) is arranged, through which the fastening means (7) for a tool, in particular a screwdriver, is accessible. Fuse load switching strip (1) according to claim 1, characterized in that the at least one opening (6) is arranged centrally with respect to a width (B) of the switching cover (4). Fuse load switching strip (1) according to one of the preceding claims, characterized in that when the upper part (3) attached or closed switching cover (4) the at least one opening (6) in the longitudinal direction (L1) of the fuse load switching strip (1) between a first safety knife a first fuse and a second fuse blade of a second fuse of the fuse load switching strip (1) is angeordet, wherein the fuses are arranged in alignment along the longitudinal axis (L1). Fuse load switching strip (1) according to one of the preceding claims, characterized in that the opening (6) has an alignment in a direction perpendicular to the surface of the switch cover (4) to the fastening means (7) out. Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) is a rotary bolt or a screw. Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) is a rotary latch which can be fastened by rotation by less than 180 degrees, preferably less than 90 degrees on the lower part (2). Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) is self-locking in the upper part (3) and / or in the lower part (2) is fixed. Fuse load control strip (1) according to one of the preceding claims, characterized in that the fastening means (7) has a guide body (8) and a head (10), wherein the head (10) has at least one engagement opening (13) or Umgriffskontur for a tool , and in particular wherein the diameter (D2) of the head (10) is greater than the diameter (D3) of the neck (23). Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) in a first region at least a first means (11) which is suitable for holding the fastening means (7) in or on the upper part (3) wherein the upper part (3) has at least one undercut (25) for receiving the at least one first means (11), and wherein the fastening means (7) in the holding state in the upper part (3) is substantially freely rotatably mounted at least within certain limits. Fuse load control strip (1) according to any one of the preceding claims, characterized in that the fastening means (7) in a second region at least a second means (9), preferably a nose or a thread, which, for holding the fastening means (7) in or at the lower part (2) is suitable. Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) has at least one axial slot (22). Fuse load switching strip (1) according to one of the preceding claims, characterized in that the fastening means (7) is at least partially conical, when the upper part (3) on the lower part (2) is fixed. Fuse load control strip (1) according to one of the preceding claims, characterized in that below the opening (6) a guide sleeve (16) is arranged, wherein the guide sleeve (16) in the switch cover (4) and / or in the upper part (3) is mounted or in the shift cover (4) is formed, wherein the guide sleeve (16) is preferably formed substantially perpendicular to the shift lid surface. Fuse load control strip (1) according to claim 13, characterized in that the guide sleeve (16) on the upper part (3) attached switch cover (4) at least partially surrounds the distance between the opening and the fastener and with closed cover (4) maximum length the distance (A) between the opening (6) and the head (10) of the fastening means (7). Fuse-loading switch strip (1) according to one of the preceding claims, characterized in that collinear with the longitudinal axis (L2) of the fastening means (7) below the fastening means (7) a guide opening (15) for introducing a means, in particular a screw, for fastening the lower part (2) is arranged on a holder. Fuse load switching strip (1) according to one of the preceding claims, characterized in that the opening (6) has a diameter (D1) of at least 3-4 mm and a maximum of 15 mm, preferably a maximum of 10 mm. Fuse load switching strip (1) according to any one of the preceding claims, characterized in that the fuse load switching strip (1) has three in alignment along the longitudinal axis (L1) arranged fuses, and that the switching cover (4) has two openings (6), of which one opening (6) centrally between the first and the second fuse, and the other opening (6) between the second and the third fuse in the switch cover is arranged. Fuse load switching strip (1) according to one of the preceding claims, characterized in that the Sicherungslastschaltleiste (1) has three in alignment in the longitudinal direction (L1) arranged fuses, per fuse per one switching cover (4) is provided, and that a first opening partially is arranged in the first and partly in the second shift lid and a second opening is partially disposed in the second and partly in the third shift lid Sicherungslastschaltleiste (1) according to one of the preceding claims, characterized in that that the Sicherungslastschaltleiste (1) has a parallel attachable and liftable or a tiltable switch cover (4).

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