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Coupling Columns for Reducing Temperature Rise at Lap Joints of Electrical Busbars

A busbar lap and column connection technology, which is applied in conductive connection, busbar installation, cable installation, etc. The effect of reducing wiring width, saving resources, and reducing current density

Active Publication Date: 2018-04-24
龚柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the overlapping length will increase the amount of busbars, which will increase the manufacturing cost of the equipment
The bolts used for fastening will reduce the electrical clearance or phase-to-phase distance between the busbars. In order to keep the electrical clearance or phase-to-phase distance unchanged, the distance between the busbars needs to be increased, and increasing the distance between the busbars will inevitably lead to the occupation of the busbars. bigger space

Method used

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  • Coupling Columns for Reducing Temperature Rise at Lap Joints of Electrical Busbars
  • Coupling Columns for Reducing Temperature Rise at Lap Joints of Electrical Busbars
  • Coupling Columns for Reducing Temperature Rise at Lap Joints of Electrical Busbars

Examples

Experimental program
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Effect test

Embodiment 2

[0068] In the first embodiment, the material of the first columnar part 1 is changed to copper alloy, and the material of the first columnar part 2 is changed to aluminum alloy. Since the hardness of the alloy is relatively high, the first columnar part 2 can be stored in a low temperature environment ( 5 degrees) for a period of time (5 minutes), while the first columnar part 1 is stored in a high temperature environment (80 degrees) for a period of time (5 minutes), with the help of thermal expansion and contraction effect, the inner diameter of the first columnar part 1 can be made slightly larger, while the outer diameter of the first columnar part 1 is slightly reduced, so that the first columnar part 2 can be easily assembled into the first columnar part 1. After the assembled connecting column returns to normal temperature, the first columnar part 1 An interference fit can be achieved with the first columnar portion 2 . The diameters and lengths of the coupling columns ...

Embodiment 3

[0070] like Figure 14-15 As shown, a second through hole 7 is coaxially provided inside the second columnar part 2 , the first columnar part 6 has a hollow structure, the second columnar part 2 penetrates the first columnar part 1 , and the outer cylindrical surface of the first columnar part 1 A first through hole 6 is radially provided, the first through hole 6 communicates with the second through hole 7 , and the first through hole 6 is located in the axial middle portion of the first cylindrical portion 1 .

[0071] Due to the arrangement of the through holes 6 and 7, when the connecting column is inserted into the prefabricated hole of the first busbar, the air in the prefabricated hole can be smoothly discharged from the second through hole 7, so that the connecting column can be smoothly assembled in place , when the second busbar is sleeved into the installed coupling column, the air in the prefabricated hole of the second busbar can be smoothly discharged from the fi...

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PUM

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Abstract

Connecting rod for reducing temperature rising on a joint of busbars, comprising: a conductive first column 1 which has an interference fit with a busbar, a conductive second column 2 with an interference fit with the first column and located inside first column, where the thermal expansion coefficient of the second column is greater than that of the first column. The connecting rod has the same overlapping length as figure 1 while reducing the amount of busbar material and having more conductive surface for reducing a current density to achieve low temperature rising of busbars. Preferably the resistivity of the second column is greater than the first column so that it has a higher temperature, so that it exerts pressure on the first column so that it interference fits more closely in the busbar. Preferably the seond column is aluminium or an aluminium alloy and the first column is copper or a copper alloy.

Description

technical field [0001] The invention relates to the field of power equipment, in particular to a connecting column of a power busbar. Background technique [0002] In the field of power distribution, the connection of two power busbars is usually overlapped and then fastened with bolts. like figure 1 In this way, the connection method needs to overlap the two busbars for a certain length, so that the current density of the contact surface is maintained within a certain range, so that the temperature rise at the connection meets the relevant standards. In order to reduce the temperature rise of power equipment, it is usually necessary to increase the overlapping length of the busbars to increase the contact area, thereby reducing the current density of the contact surface, and finally making the equipment have a lower temperature rise. However, increasing the overlapping length will increase the amount of busbars, thereby increasing the manufacturing cost of the equipment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R11/09H01B5/02H01B1/02
CPCH02G5/002H02G5/007
Inventor 不公告发明人
Owner 龚柱
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