Apparatus for electrically interconnecting two laminated multiphase bus bars

Abstract

An apparatus (1) for electrically connecting a first laminated polyphase busbar (2a) to a second laminated polyphase busbar (2b), wherein the first laminated polyphase busbar (2a) ) and each of said second laminated multiphase bus bars (2b) comprising a plurality of conductive layers (6) and insulating layers (8) arranged between said conductive layers (6), and wherein said Said conductive layer (6) of the first laminated polyphase bus bar (2a) protrudes from said insulating layer (8) of said first laminated polyphase bus bar (2a), thereby forming a first electrical The first lateral connection portion (4a) of the contact surfaces (6a1 to 6a3), and the conductive layer (6) of the second laminated polyphase bus bar (2b) from the second laminated polyphase Said insulating layer (8) of the bus bar (2b) protrudes so as to form a second lateral connection portion (4b) with a second electrical contact surface (6b1 to 6b3), the device (1) comprising: a bridging element (10) , 12) comprising a plurality of laminated insulating layers (8) and a conductive layer (6) having a surface suitable for contacting said first bus bar (2a) and said second bus bar (2b) The electrical contact surfaces (10a1, 10b1; 12a2) of the associated electrical contact surfaces (6a1-6a3; 6b1-6b3) of the first and second lateral connection parts (4a) , 12b2; 12a3, 12b3); a first pressure distribution plate (20), which is adapted to be arranged on the first side of the bus bars (2a, 2b); a second pressure distribution plate (22), which is adapted to be located in on the second side of said bus bars (2a, 2b); and tensioning bolts (14) adapted to extend through said first pressure distribution plate (20) and said second pressure distribution plate (22) ) and a central opening in the bridging element (10, 12) for pushing the first pressure distribution plate (20) and the second pressure distribution plate (22) towards each other, characterized in that, The first pressure distribution plate (20) and the second pressure distribution plate (22) include a plurality of pressure transmission elements (26) pivotally mounted to the pressure distribution plates (20, 22), wherein each The pressure transmission element (26) comprises a contact area adapted to locally contact the outer surface area of ​​the bridging element (10, 12), the outer surface area matching the first lateral connection portion (4a) and the first lateral connection portion (4a) Location of the associated electrical contact surfaces (6a1-6a3; 6b1-6b3) of the two lateral connection parts (4b).

Description

technical field [0001] The invention relates to a device for electrically interconnecting two laminated polyphase bus bars according to the preamble of claim 1 and a switchgear cabinet comprising such a device according to claim 9 . Background technique [0002] Polyphase bus bars are used in low-voltage switchgear to conduct and distribute alternating current to different electrical devices installed in switchgear cabinets. In order to conduct all three or even more phases of the alternating current in a single busbar, laminated multiphase busbars have been developed, which comprise a base layer and a cover layer made of electrically insulating material, Two or more layers made of conductive sheet metal, in particular copper sheets, are arranged between the base layer and the cover layer, said two or more layers by means of insulation located between the two conductive layers layers are electrically insulated from each other. [0003] The previously described bus bar is d...

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

Images