CN102231501A

CN102231501A - Bus bar for low-voltage power distribution cabinet

Info

Publication number: CN102231501A
Application number: CN201110184254XA
Authority: CN
Inventors: 王人定; 沈旭立; 冯群侠
Original assignee: NINGBO QI AO ELECTRIC TECHNOLOGY CO LTD
Current assignee: NINGBO QI AO ELECTRIC TECHNOLOGY CO LTD
Priority date: 2011-06-30
Filing date: 2011-06-30
Publication date: 2011-11-02
Anticipated expiration: 2031-06-30
Also published as: CN102231501B

Abstract

The invention provides a bus bar for a low-voltage power distribution cabinet. The bus bar is characterized by comprising a body part of which the cross section is concave arc-shaped, wherein the body part is provided with two edges in a length direction, side edges are arranged at the two edges in a horizontal direction and the cross sections of the side edges are in a linear shape; the two side edges are arranged in the same line; through grooves are formed between the body part and the two side edges in the length direction of the bus bar; and a gap is formed between the two side edges. The external perimeter of the bus bar in a special-shaped structure is more than that of a rectangle bus with the same cross section, thus increasing the radiating area of the bus bar effectively and reducing the temperature of the bus; a through groove is formed in the central line of the bus bar, thus being beneficial to the heat dissipation of the bus bar and improving the product performances; and the thickness of the bus bar in a special-shaped structure is less than that of a common bus bar with a rectangle or round cross section, thus skin effects of the bus bar are influenced slightly under the action of magnetic fields, thereby being beneficial to the improvement of the net sectional area of the bus bar.

Description

The busbar that a kind of low-voltage distribution cabinet is used

Technical field

The present invention relates to a kind of busbar, the busbar that particularly a kind of low-voltage distribution cabinet is used.

Background technology

Along with emerging in large numbers of modernization project facility and equipment, the power consumption of all trades and professions is fast to be increased, and can not meet the demands in the now big electric current conveying system of traditional cable as transmission pressure.In order to satisfy the big electric current delivery requirements of these systems such as transformer station, transformer and equipment, the novel distribution lead that a kind of copper, aluminum material that adopts high conductivity made is used and is given birth to, this novel distribution lead is called busbar (bus line), busbar is exactly in the confession under directions electric system, switch in the electricity cabinet in total system switch and each shunt circuit be connected copper bar or aluminium is arranged, the surface is done insulation and is handled, and main effect is to compile, distribute and transmit electric energy.

Rectangle or circular cross-section are adopted in busbar of the prior art cross section more, and the thickness of busbar is bigger, mostly are the mode that is arranged in parallel that adopts in becoming power distribution cabinet.This traditional busbar structure is subjected to the influence of kelvin effect big, increase along with ampacity on the busbar, busbar kelvin effect under the electromagnetic field effect also increases, cause the busbar effective cross-section to descend, when electric current more than 2000 amperes the time, under electromagnetic field effect, also there is proximity effect between the busbar that is arranged in parallel, can further make the conductive effective cross section of busbar reduce again, in order to satisfy the ampacity of busbar, generally can only select more heavy in section busbar for use, but the kelvin effect of bringing thus is even more serious, produces vicious circle at this point, it is anxious according to increasing to cause enterprise to produce with copper (aluminium) amount, and cost significantly rises.

Summary of the invention

Technical problem to be solved by this invention is that a kind of kelvin effect influence busbar that low-voltage distribution cabinet little, that mechanical strength is high and thermal diffusivity is better is used is provided at above-mentioned prior art present situation.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: the busbar that a kind of low-voltage distribution cabinet is used, it is characterized in that: described busbar includes the body that cross section is recessed camber line, described body forms the along continuous straight runs setting respectively on two edges that are provided with along its length and cross section is the side portion of " one " font, two described side portion are located along the same line, and, form a groove that runs through along the length direction of described busbar between described body and two the described side portion, be formed with breach between two described side portion at interval.

In order to increase the surface area of busbar, enlarge radiating surface, thereby reduce the temperature of busbar, as preferably, the body of described busbar is formed with on lateral wall along the length direction of this busbar to be offered and is undulatory teeth groove.Undulatory teeth groove has not only enlarged the surface area of busbar, can also increase the frictional force between busbar and the installation insulating part, guarantees the reliability of installing.

In order further to enlarge the surface area of busbar, as further preferred, the side portion of described busbar is formed with the raised line that is provided with along the length direction of this busbar on the top.This raised line can enlarge radiating surface on the one hand, helps the cooling of busbar, can also play spacing effect on the other hand, makes things convenient for the installation and the location of busbar.

In order to improve the performance of busbar, make things convenient for processing and manufacturing, as preferably, the body of described busbar and two side portion structure that is formed in one.

Compared with prior art, the invention has the advantages that: adopt the busbar of polymorphic structure, this busbar is made up of body that is camber line and the side portion that is in-line, and the outer circumference of this busbar is greater than the rectangular bus bar with the cross section, can effectively enlarge the area of dissipation of busbar, reduce the temperature of bus; And, be formed centrally groove in the busbar, help the heat radiation of busbar, enhance product performance; The thickness of the busbar material that the busbar of polymorphic structure of the present invention is rectangular or more circular than general section is little, makes that the kelvin effect influence of busbar under the action of a magnetic field is little, helps improving the net sectional area of busbar.

Description of drawings

Fig. 1 is the perspective view of the embodiment of the invention.

Fig. 2 is the sectional view of the embodiment of the invention.

Fig. 3 is the user mode figure of the embodiment of the invention.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 2, the busbar of present embodiment is the busbar that cross section is polymorphic structure, this busbar includes body and side portion 12, wherein, the cross section of body 11 is recessed camber line, side portion 12 is shaped in body 11 respectively at the top, two edges (being the two ends of the cross section camber line of body) that is provided with along its length, and, side portion 12 is that along continuous straight runs extends to the both sides, edge of body 11, the cross section of two side portion 12 all is " one " font, two side portion 12 are located along the same line and are provided with at interval and are formed with breach 13, form a groove 14 that runs through along the length direction of busbar 1 between body 11 and two side portion 12.

The busbar of present embodiment is different from the rectangular or circular busbar of traditional cross section, the body 11 of busbar and the thickness of side portion 12 are 4mm, littler than traditional busbar thickness, can improve the phenomenon that kelvin effect causes the busbar net sectional area to reduce, and, the special-shaped busbar outer circumference of present embodiment has enlarged the area of dissipation of busbar effectively greater than the rectangular bus bar of equal sectional area;

In order further to enlarge area of dissipation, the body 11 of present embodiment busbar 1 also is formed with a plurality of length directions along this busbar 1 and offers and be undulatory teeth groove 111 on lateral wall, the side portion 12 of busbar 1 then is formed with the raised line 121 that is provided with at interval along the length direction of this busbar 1 on the top, teeth groove 111 and raised line 121 can further enlarge the surface area of busbar, help the heat radiation of busbar.

As shown in Figure 3, be the actual user mode figure of the busbar of present embodiment, this busbar is installed in the bus-bar device that low-voltage distribution cabinet uses, wherein, bus-bar device includes top cover 3, base 4, Y shape insulating part 2 and three-phase bus bar 1, top cover 3, be fixedly connected on one by bolt 5 between base 4 and the insulating part 2, the bottom of base 4 is connected with mount pad 6, the inwall of top cover 3, form three vestibules of isolating mutually between the inwall of base 4 and the insulating part 2 respectively, three-phase bus bar 1 is contained in the corresponding vestibule respectively and forms a symmetric arrays structure that is " product " font, the arrangement architecture of this three-phase bus bar has solved the problem that former parallel arrangement architecture is positioned at the busbar weak heat-dissipating in centre position effectively, guaranteed the heat radiation uniformity of three-phase bus bar, and improved the problem that causes the busbar effective cross section to be reduced because of kelvin effect and proximity effect, improve the radiating effect of busbar, improved the overall performance of product.

Claims

1. busbar that low-voltage distribution cabinet is used, it is characterized in that: described busbar (1) includes the body (11) that cross section is recessed camber line, described body (11) forms the along continuous straight runs setting respectively on two edges that are provided with along its length and cross section is the side portion (12) of " one " font, two described side portion are located along the same line, and, the groove (14) that formation one runs through along the length direction of described busbar (1) between described body (11) and two the described side portion (12) is formed with breach (13) at interval between two described side portion.

2. the busbar that low-voltage distribution cabinet according to claim 1 is used is characterized in that: the body (11) of described busbar (1) is formed with on lateral wall along the length direction of this busbar (1) to be offered and is undulatory teeth groove (111).

3. the busbar that low-voltage distribution cabinet according to claim 1 is used is characterized in that: the side portion (12) of described busbar (1) is formed with the raised line (121) that is provided with along the length direction of this busbar (1) on the top.

4. the busbar of using according to claim 1 or 2 or 3 described low-voltage distribution cabinets is characterized in that: the body (11) of described busbar (1) and two side portion (12) structure that is formed in one.