WO2009010360A2

WO2009010360A2 - Feedthrough for cables or busbars of a power distribution unit

Info

Publication number: WO2009010360A2
Application number: PCT/EP2008/057651
Authority: WO
Inventors: Marcella Günther
Original assignee: Siemens Aktiengesellschaft
Priority date: 2007-07-19
Filing date: 2008-06-18
Publication date: 2009-01-22
Also published as: DE102007034269A1; WO2009010360A3

Abstract

The invention relates to a feedthrough (106) for cables or busbars of a power distribution unit (101), comprising a cladding part (107) preventing foreign-object damage, to be fastened to the rack (102) of the power distribution unit, said cladding part having a first feedthrough opening (110) for feeding through the cables or busbars, a cladding part (108) providing safety from water and being arranged at a defined distance (112) above the cladding part (107) preventing foreign-object damage, the cladding part providing safety from water having a second feedthrough opening (111) for feeding through the cables or busbars, and a connecting duct (109) configured in one of the wall sections, which connects the first feedthrough opening (110) to the second feedthrough opening (111). In order to reduce the number of variants and the complexity of the feedthrough, the first of the wall sections of the connecting duct (109) is configured as an integral part of the cladding part (108) providing safety from water or as an integral part of the cladding part (107) preventing foreign-object damage.

Description

description

Feedthrough for cable or busbars of a power distribution unit

The invention relates to a bushing for cable or busbars of a power distribution unit.

In power distribution units, in particular in the form of low-voltage breakers or low-voltage

Cabinets, it is necessary to lead in the roof or floor area cables or busbars by a plant space limiting enclosure (cladding).

In this case, when passing the cable or busbars through the enclosure, a predetermined scope of protection must be maintained, which is predetermined for the power distribution unit by a protection ^{¬ type} . In a known manner, the scope of protection includes the protection of persons against touching live parts and the protection of electrical equipment against the ingress of solids and water in housings and enclosures (DIN VDE 0470-1). The type of protection is expressed internationally by a combination of letters (IP = international protection) and reference numbers. One of the indices defines contact and foreign body protection, and a second of the indices defines the water protection.

Therefore, in power distribution units for the implementation of cables or busbars usually two coating ^¬ components necessary. A ventilated first component is used for foreign body protection and a second component is used for water protection, especially the drip water protection. These two components are usually built on top of each other. The required cables or busbars are to be routed through the two components mentioned and the respective degree of protection must be observed.

From practice a passage for cables or busbars in power distribution units according to the figure 1 is known. This known implementation consists of

a foreign body protection cladding part to be fastened to the frame of the power distribution unit, which is provided with a first opening for the passage of the cables or ^bus bars,

- A arranged at a predetermined distance above the Fremdkörperschutz- wrapping part water-protective enclosure part, which is provided with a second passage opening for the implementation of the cable or busbars and

- A connecting shaft formed by wall sections, which connects the first passage opening with the second passage opening.

In this known implementation, three separate protection components are built on the framework. A first protection component in the form of the first foreign body protection enclosure part for degree of protection IP20-IP40 (maximum 12.5 mm to at least 1 mm foreign body protection), a second protection component in the form of the water protection enclosure part for protection class IPX1-IPX2 (dripping water in the angle of incidence perpendicular to 15 °) and a third protection component in the form of Ver ^¬ binding shaft. In this case, the connection shaft, which is below the second protection component, in the protection ^¬ type IP20-IP40 (maximum 12.5 mm to at least 1 mm Fremdkör ^¬ perschutz) - ie in the same degree of protection as the first protection component - executed , Since the feedthrough openings for different applications must have different sizes (different widths and different depths), the connection shaft must be provided in these different sizes accordingly.

Based on an implementation with the features of the preamble of claim 1 (Figure 1) of the inven ^¬ tion is the object of the invention, the variants or parts variety of implementation to reduce.

According to the invention, this object is achieved in that the first of the wall sections of the connection shaft, as inte ^¬ graler part of the water-protective enclosure part or as an integral part of the foreign body protection-wrapping part are formed. It is therefore intended to integrate the third protection component in the form of the connection shaft as far as possible into one of the two other protection components. This makes it possible to further complete the connection chess in that second wall sections of

Connecting shaft of connecting parts are formed, which connect the first wall sections and which are formed separately to the covering parts as equal parts. - In this case, the connection shaft can be cuboid, with its sides are formed by the first wall sections and its corners of the second wall sections.

The required connecting ^parts can in particular also un ^¬ depending on the dimension of the passage openings all always be the same.

In a preferred embodiment of the new implementation, the first wall sections of the connection shaft are formed by bent first partial surfaces of the water-protective enclosure part, wherein advantageously the connecting shaft support surfaces may be provided for supporting on the foreign body protection-wrapping part, which are formed as bent second faces of the water-protective wrapping part.

In the same way, however, the first wall sections can also be formed as bent first partial surfaces of the foreign-body protection enclosure part, wherein support surfaces for supporting on the water-protection enclosure part can then advantageously be provided on the connection shaft, which are formed as bent second partial surfaces of the foreign-body protection enclosure part are.

Accordingly, in these preferred embodiments, the function of the connecting shaft is almost completely formed from the lost material of the lead-through opening of the water-protecting covering part or the foreign-body protecting covering part. The part of the connection shaft which is formed by the connecting parts only has a small share of the total material expenditure. The Materialauf ^¬ wall for manufacturing the implementation is thereby significantly reduced.

In a further preferred embodiment of the new implementation is provided to provide bending of the faces material-reducing bending zones, which reduce the forming force to manual force. - These bending zones may be predetermined bending line, which are formed for example by perforations, in particular ^¬ special in the form of mutually offset slots arranged.

The new bushing is very well suited for the passage of cables or busbars through the roof or the bottom of the power distribution unit, because of the partial integration the connection shaft in the water-protective enclosure part or the foreign-body protection-Umhüllungsteiles the scope of the power distribution unit in a simple way not only ^¬ held but even improved.

The invention will be explained nä ^¬ forth her for better understanding of ^¬ hand illustrated in the drawing, the scope of the invention not limiting embodiment. Showing:

Figure 1 shows a detail of a power distribution unit in the form of a low-voltage switch panel, with frame and enclosure, wherein the roof of the power distribution unit forming part of the enclosure is formed by a known from practice implementation of cables or busbars and

FIGS. 2 to 4 are sections of a further power distribution unit in the form of a low-voltage

Switching field in which the roof forming the roof ^¬ de part of the enclosure is formed by an inventive implementation for cables or busbars,

1 shows a well-known from practice Stromvertei ^¬ lereinheit 1 in the form of a panel of a known also as a point distribution in the power distribution technology ^¬ switchgear. The switch panel has a framework (frame) 2 formed from profiles and a sheathing 3 for the framework.

Of the enclosure 3 are two vertically extending ^{Seitenwän ¬} de 4 and 5 in the form of Beplankungsblechen and a the roof see the power distribution unit forming implementation 6 for not shown cables or busbars.

The passage 6 consists of a fixed to the frame 2 of the power distribution unit foreign body protection enclosure part 7, a water protection enclosure part 8 and a connection ^¬ bay 9th

In this case, the foreign body protection cladding part 7 is provided with a first passage opening 10 for performing not shown cables or busbars, and the water protection cladding part 8 has a second implementation ^¬ opening 11 for the passage of the cables or busbars and is at a predetermined distance 12 on the foreign body protection-wrapping part 7 is arranged. The connection shaft 9, which is formed by wall sections, connects the first passage opening 10 to the second passage opening 11.

In contrast to this known bushing 6, the connecting shaft according to the invention, which is shown in FIGS. 2 to 4 and described below, is essentially integrated in the water-protection casing part.

Not shown in the figure is another embodiment of the new implementation, in which the connection shaft is not integrated into the water protection enclosure part but-in otherwise the same way-into the foreign body protection enclosure part.

Figures 2 to 4 show a power distribution unit 101 in the form of a control panel of a switchgear. Again, points the panel on a scaffold (frame) 102 formed from profiles and a sheathing 103 for the framework on.

Of the sheath 103, only one of the roof of Stromvertei- ller unit forming bushing 106 for cables or Strom ^¬ rails to see.

The bushing 106 consists of a foreign body protection wrapping part 107 attached to the frame 102 of the power distribution unit, a water protection casing part 108 and a connection shaft 109.

Here, too, the foreign body protection wrapping part 107 is provided with a first feedthrough opening 110 and the water protection wrapping part 108 is provided with a second feedthrough opening 111, which serve to carry out cables or busbars which are not shown in any more detail. The connection shaft 109, which is formed by wall sections, connects the first passage opening 110 with the second passage opening 111. In this case, the connection shaft is cuboidal. So he has a square cross-section.

The foreign body protection sheath part 107 serves the contactless rungs- and foreign body protection according to the degree of protection IP20 IP40 and the water protective covering member 108 which is at ^¬ orderly at a predetermined distance 112 above the foreign body protection sheath part 107, serves to water protection according to the degree of protection IPX1- IPX2.

From the lost material of the second lead-through opening 111 of the water-protection covering part 8, along first bending zones 113, 114, 115 and 116, first partial surfaces 117, 118, 119 and 120 are in the direction of the foreign-body protection-covering part 107 bent, the first of the wall sections - namely the side surfaces - form the connection shaft.

Respectively at the ends of the first partial surfaces which face the foreign body protection wrapping part 107, second partial surfaces 125, 126, 127 and 128 are bent out of the lost material of the second through opening 111 along second bending zones 121, 122, 123 and 124. These second part surfaces form support surfaces for supporting the connection shaft 109 on the side facing away from the water protection enclosure 8 Sei ^¬ te of the foreign body protection-Umheilungsteils 107. The fact that the second partial surfaces (support surfaces) of the water-protective enclosure part 8 engage behind the foreign body protection-wrapping part 107, that is Water protection wrapping part 8 securely clamped to the foreign body protection wrapping part 107.

The bending zones 113, 114, 115 and 116 and 121, 122, 123 and 124 are perforations, which are formed by mutually offset slots.

Corner edges of the connection shaft are formed by four separate, formed as equal parts connecting parts 130. These four connecting portions are overlap the manner of tongs over bent tabs, the inner edge of the first through opening 110, ge ^¬ clamped to the foreign body protection sheath part 107 and first screw (shown only through openings 131 for receiving connecting screws) to the foreign body protection sheath part 107 buildin ^¬ Untitled , So that the connecting parts 130 complete the connection shaft 109 by way of second Schraubverbin ^¬ applications (again, only through holes 133, 134 shown for receiving connecting screws) with the space formed by the first partial surfaces 117, 118, 119 and 120 side walls are connected. To further support the corners of the water-resistant wrapping part 108 to the foreign-body protection-wrapping part 107, four support components 135 are additionally provided, which are also formed as equal parts and third

Screw (again see only through openings 136 for receiving connecting screws) with the foreign body protection sheath part 107 and the frame 102 are ver ^¬ prevented.

If no cables or ^bus bars are guided through the new leadthrough 106, the second ^leadthrough opening 111 of the water-proof cover part 108 is closed from above with a cover 137. In this case, the cover 137 is fixed to the water-protection covering part 108 by way of fourth screw connections (again, only through-openings 138, 139 for receiving connecting ^screws are visible).

Claims

claims

A lead-through (106) for cables or bus bars of a power distribution unit (101) - having a foreign body protective covering part (107) to be fastened to the frame (102) of the power distribution unit, which is provided with a first lead-through opening (110) for passing the cables or bus bars , - with a at a predetermined distance (112) above the foreign body protection-wrapping part (107) arranged water-protective enclosure part (108) which is provided with a two ^¬ th implementation ^opening (111) for carrying the cable or busbars and - with a through wall sections formed connecting shaft (109) which connects the first passage opening (110) with the second passage opening (111), characterized in that first of the wall sections of the connecting shaft

(109), are formed as an integral part of the water-resistant wrapping part (108) or as an integral part of the foreign-body-protecting wrapping part (107).

2. bushing (106) according to claims 1, characterized in that second wall sections of the connecting shaft (109) of connecting parts (130) are formed, which connect the first wall sections and the separately ^{¬ to} Umhüllungsteilen (107, 108) as equal parts are formed.

3. bushing (106) according to claim 2, characterized in that the connection shaft (109) is cuboid and that its sides are formed by the first wall sections and its corners by the second wall sections.

4. The bushing (106) according to claim 1, wherein the first wall sections are configured as bent first partial surfaces (117, 118, 119, 120) of the water-proof covering part (108).

5. bushing (106) according to claim 4, characterized in that on the connection shaft (109) support surfaces for supporting ^¬ on the foreign body protection-wrapping part (107) are provided, wherein the support surfaces as bent second Teilflä ^¬ chen (125, 126, 127, 128) of the water-shielding part (108) are formed.

6. The bushing (106) according to claim 1, wherein the first wall sections of the connection shaft are formed by bent first partial surfaces of the foreign-body protection-covering part.

7. bushing (106) according to claim 6 characterized in that, provided on the connection shaft support surfaces for supporting on the water-protective enclosure part, wherein the support surfaces are formed as bent second Teilflä ^¬ surfaces of the foreign body protection-wrapping part.

8. bushing (106) according to one of claims 1 to 7 d a d u r c h e c e n e c e s e s d e s s, for bending the partial surfaces bending zones (113, 114, 115, 116, 121, 122, 123, 124) are provided.

9. Bushing (106) according to claim 9, which forms the bending zones (113, 114, 115, 116, 121, 122, 123, 124) of perforations, in particular in the form of elongated holes arranged offset from each other.

10. Power distributor unit (101) with a leadthrough (106) for cables or busbars, d a d c h e c e n e c e s t a s, the leadthrough (106) according to one of Claims 1 to 9.