EP1997200A1

EP1997200A1 - Busbar bushing for a partition in a switchgear assembly

Info

Publication number: EP1997200A1
Application number: EP07726713A
Authority: EP
Inventors: Volker Haas; Yvette GÜNTHER; Bernd Wehnelt
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2006-03-21
Filing date: 2007-03-08
Publication date: 2008-12-03
Also published as: WO2007107456A1; RU2008141694A; DE102006013928A1

Abstract

The invention relates to a busbar bushing for a partition in a switchgear assembly. In order to provide a busbar bushing which can be used particularly universally, provision is made for the busbar bushing to be formed from two identical housing parts, wherein the housing parts have a number of fitting elements for optionally mechanically fixing one or more busbars.

Description

description

Busbar bushing for a partition in a switchgear

The invention relates to a busbar bushing for a partition in a switchgear.

The individual functional spaces of a switchgear or a switchgear cabinet, for example, the compartments are separated at he ^¬ creased demands on the shape of the inner partition by means of partition walls. These partitions are for ^¬ mostly made of sheet metal.

In order to ensure an electrical connection between the arranged in adjacent functional spaces busbars, devices, cable connections, etc. with each other, busbars are performed by these partitions.

Busbar bushings are used for this purpose. In other words, such a busbar bushing is used for the insulating implementation and determination of a bus bar through a partition wall.

The busbar is to be fastened in a suitable manner. In addition, an electrical insulation between the usually made of copper busbar and the often Metalli ^¬ rule partition to ensure. In addition, the requirements of the internal subdivision must be fulfilled by the opening formed in the conductor rail feedthrough.

Known busbar bushings therefore consist mostly of support elements made of insulating material, which together and connected to the partition by screws. Bauartbe ^¬ these known busbar bushings are always suitable for a single busbar type dingt.

An object of the present invention is to provide a particularly versatile ^¬ determine busbar duct.

This object is achieved by a busbar bushing according to claim 1. Thereafter, it is provided that the busbar bushing is formed of two identical housing parts, wherein the housing parts have a number Montageememen ^¬ te for selectively mechanically fixing one or more bus bars.

A basic idea of the invention lies in the use of two identical housing parts, which preferably consist of a elekt ^¬ driven insulating plastics material and are produced in an injection molding process. These are preferably arranged rotated by 180 ° to each other, wherein the Dre ^¬ hung takes place about the central transverse axis of the busbar bushing. The use of identical housing parts reduces the manufacturing, storage and assembly costs for the busbar bushing.

Another basic idea of the invention lies in the use of specially designed mounting elements which serve for the optional mechanical fixation of one or more busbars in the busbar bushing. In other words, a key point of the invention lies in the fact that not only one, but optionally also two or more busbars can be inserted into a single busbar bushing. The fixation is preferably carried out by mounting elements of a single housing part and / or in Montageend ^¬ state cooperating mounting elements of both housing parts. The mechanical fixation of the busbar is carried out ^¬ finally by the self-integrated in the busbar bushing mounting elements. Additional structural measures ^¬ measures, for example, outside the busbar bushing are not required.

The very compact design of the busbar bushing, made possible by the design concept, leads to a very small space requirement and thus fulfills an ever more important requirement for a high packing density in switchgear systems.

The busbar bushing according to the invention can be used not only to carry out further busbars, but also as a connection terminal for fixing a freestanding busbar to which lines can be connected on both sides. In addition, the busbar bushing according to the invention is designed in such a way that it can also be used for closing cutouts in partitions without a bus bar being inserted in the busbar leadthrough.

Advantageous embodiments of the invention are specified in the subclaims.

Thereafter, it is particularly advantageous if the mounting elements are designed to pass through openings in the busbar and / or to engage in recesses in the busbar. In other words, in this way the current Rail in a particularly simple yet effective way thereby mechanically fixed in the busbar bushing. The mounting elements may be formed, for example, as a stop, holding, guiding and / or connecting elements. As particularly effective for a fixation mounting elements have proven in the form of rectangular plug-in elements, which are preferably angeord ^¬ net centrally on the housing parts and facing each other in the final assembled state. Since ^¬ with a secure position fixation of the busbar in all directions is possible.

Moreover, it has proved to be advantageous if the housing parts of the busbar implementing removable Gehäu ^¬ soul elements have to perform busbars various type. Preferably, at the ent ^¬ fernbaren housing elements are separable from the housing parts, in particular break-out, the housing elements. The Gehäu on ^¬ seteile for this purpose have corresponding predetermined breaking points. These are preferably designed such that a break can be done by hand or with simple tools. The housing parts are preferably designed such that by a pairwise removal of housing elements al ^¬ ternative passageways are formed in the busbar bushing. As a result, the busbar bushing according to the invention is suitable for various rail cross sections.

The housing parts are preferably designed in such a way that the busbars can be led through the busbar bushing in various feedthrough positions, for example upright or transversely. This not only results in diverse connection and application possibilities. At the same time ensures the optional provision of several and / or different Durchführungswege by the removal of housing elements a particularly simple performing a plurality of busbars of the same or different types. This significantly reduces the number of required busbar bushing types. This in turn leads to decreasing production and storage costs.

The measures provided for mounting the housing parts Verbindungsele ^¬ elements are preferably designed for producing a latching and / or snap connection. Latching and / or snap connections are characterized both by their simplicity and robustness as well as by their reliability and Betriebssi ^¬ safety. The housing parts are preferably formed in ^{wesentli ¬} Chen U- or L-shaped, which makes their assembly miteinan- much easier. In particular, the connecting ^{elements are} preferably attached to the U-limbs or the L-limbs.

For mounting, a number of busbars are first inserted into a first and / or a second housing part. At ^¬ closing the housing parts are connected to each other using the previously described ^¬ connecting elements.

Finally, the busbar bushing is mounted in a suitable cut-out in the partition wall. Also for this connection elements are provided, which are preferably also designed to form a latching and / or snap and / or clamping connection. In other words, the busbar bushing is preferably snapped or snapped or clamped into the cutout of the partition wall. The connecting elements are preferably further formed before ^¬ such that the Stromschienendurchfüh ^¬ tion without using a tool in the section of the Partition can be mounted. The respective connecting elements ^¬ are preferably mounted on the outside of the housing parts and comprise an at least partially circumferential stop edge, which abuts the partition wall in the assembled state. Preferably, the partition between this An ^¬ impact edge and other connecting elements is set.

The connection of the two housing parts for a power shift ^¬ nendurchführung is preferably configured such that the mounting direction is transverse to the direction in which the

Busbar bushing is inserted into the partition wall. In the assembled state thereby serves the edge of the cutout in the partition at the same time as a busbar bushing encircling or umklammernde attachment and the housing parts of the busbar bushing can not "tilt out" forward or backward from the cutout in the partition.

The connecting ^elements are moreover preferably of the type that, in the assembled state, the requirements for clearances and creepage distances and the requirements for the shape of the inner subdivision, in particular according to VDE 0660 or DIN EN 60439, are met. The conducted busbar or busbars need not be equipped with additional insulation.

The invention will be described below with reference to a Ausführungsbei ^¬ game, which is explained in more detail with the aid of drawings. This show in simplified, z. T. schematic diagrams of ^¬:

1 shows a housing part of a busbar bushing in a perspective view, a housing part of a busbar bushing in front view,

a housing part of a busbar bushing in side view,

a busbar bushing in exploded view,

a busbar bushing in side view,

a busbar bushing mounted in a section of a partition,

a busbar bushing with a vertical rail of the first type,

the busbar bushing from FIG. 7 with only one housing part,

a busbar bushing with an upright rail of the second type,

the busbar bushing from FIG. 9 with only one housing part,

a busbar bushing with a transverse busbar of the third type,

the busbar bushing from FIG. 11 with only one housing part, 13 shows a busbar bushing with two transverse busbars of the third type and different lengths, and

14 shows the busbar bushing from FIG. 13 with only one housing part.

The below-described, exemplarily selected current ^¬ track ^bushing 1 is formed by two identical Gehäusetei- Ie 2, 3. One of these housing parts 2 is shown in Figures 1 to 3 and will be described in more detail below. It is made ge ^¬ from an electrically insulating plastic material, and etc. made with all described below mounting members integrally in an injection molding process.

The housing part 2 has a substantially U-shape. The two differently long U-legs 4, 5 extend substantially perpendicularly from the U-bottom 6 away in Monta ^¬ device 7 to a second housing part 3. For mounting the first housing part 2 on the second housing part 3, 5 connection elements are provided on the U-legs 4, which are described in more detail below.

Connected to the U-bottom 6 are two side walls 8, 9, which also extend in the mounting direction 6 and connect the shorter U-leg 4 with the longer U-leg 5 of the housing ^¬ part 2, so that a kind in the mounting direction. 7 open box results. Here, the U-bottom 6 serves as rear ^¬ wall, the shorter U-leg 4 serves as a roof and the longer U-leg 5 serves as a floor, while the two side walls 8, 9 serve for lateral boundary. The leading edges 11 of the side walls 8, 9 have approximately with ^¬ tig each have a recess 12 which can be used in the assembly state for receiving a busbar. The recess 12 is bounded on both sides by housing elements 13, 14, which are formed as parts of the side walls 8, 9 and are also connected to the side walls 8, 9 via predetermined breaking points 15. The housing elements 13, 14 are individually breakable from the side ^¬ walls 8, 9. Are all housing elements 13, 14 broken out of the side walls 8, 9, remain both on the shorter U-legs 4 and on the longer

U-legs 5 side wall residues 16, 17, which then serve as a support ^¬ or boundary surfaces for one or more to be performed busbars. At the same time, by removing the housing elements 13, 14, further recesses 18, 19 are created in the side walls 8, 9, which extend almost to the base 6.

In about the middle of the U-bottom 6 is a rectangular cross-section and in the mounting direction 7 extending plug 21 is provided. The front side 22 of the Steckele ^¬ mentes 21 closes and aligned with the leading edges 11 of the side walls 8,. 9 The plug-in element 21 is connected to the shorter U-leg 4, the longer U-leg 5 and the two Be ^¬ tenwänden 8, 9 via stabilizing struts 23, 24 which rest on the U-bottom 6. The stabilizing strut 24 which connects the plug-in element 21 to the longer U-leg 5 passes approximately in one half of the way in the direction of the longer U-leg 5 into a projection 25 extending from the U-bottom 6 in the mounting direction 7. The projection 25 consists of a projection roof 26 connected to the stabilizing strut 24 and two protrusions extending from the protruding roof 26 in the direction of the longer U-leg 5 and connected to the latter, spaced apart from each other. Walls 27. The leading edges 28 of the projection walls 27 also have recesses 29. The lower, in the direction of the longer U-leg 5 facing recessed edges 31 are aligned with the lower, pointing in the direction of the longer U-leg 5 predetermined breaking points 15 of ausbrechbaren housing elements 14 of the side walls 8, 9. The projection 25 is aligned with the leading edges 11 of the side walls 7, 8 from.

As shown in FIG 4, the housing parts 2, 3 are arranged for mounting rotated by 180 ° to each other, wherein the rotation about its central transverse axis 32, and the center transverse axis of the resulting busbar bushing 1 takes place. When the two housing parts 2, 3 are brought together in the mounting direction 7, there is a locking of connecting elements which are provided on the U-legs 4, 5. For this purpose, the shorter U-leg 4 is designed in two parts such that, starting from the U-base 6, two leg sections 33, 35 extend in the mounting direction 7. In this case, the inner leg portion 33, which is connected at its inner side 34 at the same time with the side walls 8, 9, further in the mounting direction 7 as the overlying outer leg portion 35. Between the two leg portions 33, 35 of the first housing part 2, a receiving groove 36 is formed to accommodate the longer U-leg 5 of the second housing part 3. This longer U-leg 5 has at its, the side walls 8, 9 opposite outer side 37 extending transversely to the mounting direction 7 locking edge 38. When inserting the longer U-leg 5 in the receiving groove 36 of the shorter U-leg 4, the locking edge 38 engages in a provided on the inner ^¬ page 39 of the outer leg portion 35 of the shorter U-leg 4 locking groove 41, which also transverse to Mounting direction 7 runs. In the assembled state, the intermeshing U-leg pairs 4, 5 form a firm connection between the two housing parts 2, 3. The busbar bushing 1 has a substantially rectangular cross-section, cf. FIG

5, and is suitable for mounting in a corresponding cutout 42 in a partition 43 of a switchgear, cf. FIG

6 shows symbolically a busbar bushing 1 in a cutout 42 of a partition wall 43, without a busbar is passed through the busbar bushing 1.

For mounting in the cutout 42 of the partition 43 ei ^¬ serve nerseits a power rail joint bushing 1 at least partly encircling abutment edge 44 and the other two co-operating with the abutment edge 44 of spring elements 45 of the longer U-leg 5 are respectively attached to the outer sides 37th The spring elements 45 are located on the sides of the U-legs 5, which have no locking edges 38. Over the width of the spring elements 45, the circumferential An ^¬ impact edge 44 is interrupted. Thus, the partition wall 43 is clamped in Mon ^¬ days state of the spring element 45 between the two ends of the stop edge 44. The spring elements 45 dur ^¬ fen bow-like each of a side edge 46 of the longer U-leg 5 starting in the direction of leg center and are deflected to jamming.

The implementation of different types of busbars is shown in Figures 7 to 14. In this case, only free-standing busbars 47, 48 are shown, to which lines can be connected on both sides by means of corresponding connection openings 49. In Figures 7 and a busbar bushing 1 is abge ^¬ forms with an edge rail 47 of the first type edgewise. A breaking of housing elements 13, 14 is not required for this purpose. The busbar 47 is located in the recesses 12 of the side walls 8, 9 a. At the same time the busbar 47 is fixed to all sides in the busbar bushing 1, since both the plug-in element 21 of the first housing part 2 and the plug-in element 21 of the second Ge ^¬ housing part 3 einliegen in a correspondingly shaped Fixierungsöff- 51 of the bus bar 47. Recesses 12, fixing hole 51 and plug-in elements 21 are adjusted as preferential ^¬ such in shape and size to each other that in the assembled state almost no play between the Gehäusetei ^¬ len 2, 3 and the power rail 47 is present.

In Figures 9 and 10, a busbar bushing 1 is formed with a vertical edge busbar 47 of the second type from ^¬ . This differs from the current rail ers ^¬ th type by their greater width at the same height. To form a Durchführungsweges all removable housing elements 13, 14 ^{herausgebro ¬ Chen} from the side walls 8, 9. The busbar 47 is in each case at the Seitenwandres- th 16, 17 at.

Not shown is another embodiment in which a busbar with a medium width in the same busbar bushing 1 can be mounted edgewise, if only one side of the busbar bushing 1 housing elements 13 or 14 out of the side walls 8, 9 heraus- broken and the fixing opening 51 is provided in the busbar off-center. FIGS. 11 and 12 show a busbar bushing 1 with a transversely situated bus bar 48 of the third type. For this purpose, the current shift ^¬ be nendurchführung 1 Housing members 13 of the side walls 8 only on one side, broken out. 9 This results in a further Durchführungsweg for receiving the busbar 48, wherein for Lagesi ^¬ tion of the busbar 48, the projection 25 of a housing ^¬ part 2 engages in a corresponding lateral recess 52 of the busbar 48, which a rectangular, the jump 25 adapted shape having.

Finally, FIGS. 13 and 14 show a busbar bushing 1 with two transverse busbars 48 of the third type, which differ only in their length. For this purpose, on both sides of the busbar bushing 1, the housing elements 13, 14 broken out of the side walls 8, 9, resulting in two separate and safety point of view sufficiently complained of implementation paths for receiving two bus bars 48. The position securing the bus bars 48 again takes place by engaging the two projections 25 of the housing part 2, 3in corresponding lateral recesses 52 of the bus bars 48th

Reference i

1 busbar bushing

2 first housing part

3 second housing part

4 shorter U-legs

5 longer U-thighs

6 underground

7 mounting direction

8 side wall

9 side wall

10 (free)

11 sidewall leading edge

12 sidewall recess

13 ausbrechbares housing element

14 ausbrechbares housing element

15 predetermined breaking point

16 sidewall rest

17 sidewall remainder

18 resulting recess

19 resulting recess

20 (free)

21 square plug-in element

22 plug element front side

23 stabilizing strut

24 stabilizing strut

25 retaining projection

26 projection roof

27 projection wall

28 projection wall leading edge

29 projection wall recess

30 (free)

31 recess edge 32 center transverse axis

33 inner leg section

34 leg section inside

35 outer leg portion 36 receiving groove

37 thigh outer side

38 locking edge

39 inside

40 (free) 41 locking groove

42 section

43 Partition wall

44 stop edge

45 spring element 46 side edge

47 busbar

48 busbar

49 connection opening

50 (free) 51 Busbar fixing opening

52 busbar recess

Claims

claims

1. Busbar bushing (1) for a partition (43) in a switchgear, characterized in that it is formed from two identical housing parts (2, 3), wherein the housing parts (2, 3) a number of mounting elements (16, 17, 18, 19, 21, 29) for selectively mechanically fixing one or more bus bars (47, 48).

2. Busbar bushing (1) according to claim 1, characterized in that the mounting elements (16, 17, 18, 19, 21, 29) for reaching through openings (51) in the busbar (47) and / or for engaging in recesses (52 ) are formed in the bus bar (48).

3. busbar bushing (1) according to claim 1 or 2, characterized by mounting elements in the form preferably centrally on the housing ^¬ share (2, 3) arranged, facing each other, preferably rectangular plug-in elements (21).

4. busbar bushing (1) according to one of claims 1 to 3, d a d e r c h e c e n e c e in that the housing parts (2, 3) have removable housing elements (13, 14) for passing busbars (47, 48) of various types.

5. busbar bushing (1) according to one of claims 1 to 4, characterized by Connecting elements (36, 38, 41) for forming a latching and / or snap connection of the substantially U-shaped or L-shaped housing parts (2, 3) with each other, wherein the connecting elements (36, 38, 41) preferably at the U Legs (4, 5) and the L-legs are mounted.

6. busbar bushing (1) according to one of claims 1 to 5, characterized by connecting elements (44, 45) for forming a latching and / or snap and / or clamping connection with the partition wall (43), wherein the connecting elements (44, 45) preferably on the outside of the housing parts (2, 3) are mounted and at least partially encircling stop edge (44) encompass.