Apparatus for electrically interconnecting two laminated multi-phase busbars

Abstract

An Apparatus (1) for electrically connecting a first laminated multi-phase busbar (2a) to a second laminated multi-phase busbar(2b), wherein each of said first and second laminated multi-phase busbars (2a, 2b) includes a plurality of conducting layers (6) and insulating layers (8) which are arranged between said conducting layers (6) and wherein said conducting layers (6) of said first laminated multi-phase busbar (2a) project from said insulating layers (8) thereof, forming a first lateral connecting portion (4a) with first electrical contact surfaces (6a1 to 6a3 ), and said conducting layers (6) of said second laminated multi-phase busbar (2b) project from said insulating layers (8) thereof, forming a second lateral connecting portion (4b) with second electrical contact surfaces (6b1 to 6b3), the apparatus (1) comprising a bridging element (10,12) which includes a plurality of laminated insulating layers (8) and conducting layers (6) having electrical contact surfaces (10a1, 10b1; 12a2, 12b2; 12a3, 12b3) which are adapted to contact associated electrical contact surfaces (6a1 -6a3; 6b1-6b3) of said first and second lateral connecting portions (4a, 4b) of said first and second busbar (2a, 2b), a first pressure distribution plate (20) which is adapted to be arranged on a first side of said busbars (2a,2b), a second pressure distribution plate (22) which is adapted to be located on a second side of said busbars (2a,2b) and a tensioning bolt (14) which is adapted to extend through a central opening formed in said first and second pressure distribution plates (20, 22) and said bridging elements (10, 12), for urging said first and second pressure distribution plates (20, 22) towards each other, is characterized in that said first and second pressure distribution plate (20, 22) comprises a plurality of pressure transfer elements (26) which are pivotally mounted to said pressure distribution plates (20,22), wherein each pressure transfer element (26) comprises a contact area which is adapted to locally contact an outer surface area of said bridging element (10,12) which matches the position of an associated electrical contact surface (6a1-6a3; 6b1-6b3) of said first and second lateral connecting portions (4a, 4b).

Description

technical field [0001] The invention relates to a device for electrically interconnecting two laminated multiphase bus bars according to the preamble of claim 1 and a switchgear cabinet according to claim 9 comprising such a device. Background technique [0002] Multiphase busbars are used in low-voltage switchgear for conducting and distributing alternating current to the different electrical devices installed in the switchgear cabinet. In order to conduct all three phases or even more phases of alternating current in a single bus bar, laminated multiphase bus bars have been developed. Laminated multiphase bus bars comprise base and cover layers made of electrically insulating materials, Between the base layer and the cover layer are arranged two or more layers made of conductive sheet metal, in particular copper sheet, by means of an insulating The layers are electrically insulated from each other. [0003] The previously described bus bar is described in DE 10 2005 015 ...

AI Technical Summary

Problems solved by technology

Due to the rigid construction of the clamping plate, variations in the thickness of the busbars caused by manufacturing tolerances cannot be compensated, so that the clamping force in the area of ​​the lateral contact portion with reduced thickness is reduced, which in turn can cause electrical contact question

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