CN1947210A - lug - Google Patents

Abstract

The invention relates to a terminal strip for connecting a supply line to a busbar, wherein a first end (100a) of the terminal strip (100) is provided with a flat leg, the flat leg is connected to the busbar (70) by resting on the flat side of the busbar, on the second end (100b) of the terminal lug (100) there is a terminal lug in which there is at least one terminal opening (180, 18) for fastening the supply line, it is proposed that the terminal lug has the shape of a plate (120) which continues the flat leg, two side wall surfaces (140) are formed on both sides of the plate (120), said side wall surfaces extending perpendicularly to the plate plane of the plate (120) and parallel to the longitudinal extension (110) of the plate (120), at least two terminal openings (180) which are arranged transversely to the longitudinal extension (110) of the plate (120) are provided in each side wall (140).

Description

lug

The invention relates to a lug for connecting a feeder to a bus bar, wherein a flat leg is designed on a first end of the lug, which can be brought into contact with the bus bar by being placed on a flat side of the bus bar. For bus bar connection, a terminal is designed on the second end of the lug, and at least one connection through hole for fixing the feeder is designed in the terminal.

For example DE 28 25 037 C2 discloses lugs for connecting more feeders to busbars. In this case a connecting block is used, which has a plate perpendicular to the direction of extension of the cables for each busbar, on which flat connecting lugs are arranged facing the busbars and facing the cables The ground has some lugs. In order to reduce the leakage magnetic field, such a design structure should be compact in space. Such a connection block is not suitable for a busbar system that needs to be operated with alternating current, because it needs to be in contact with four busbars or wiring rails, and the above-mentioned prior art cannot rationally carry out such an extended application.

Wiring arrangements for alternating current busbar systems are known. A device for center taps is known from DE 299 17 169 U1, and a connection device for busbar terminal taps is known from DE 94 05 320 U1.

The lugs known from the above-mentioned last two patent documents only allow the connection of a maximum of two cable lugs or lugs per lug. With the ever-increasing power of busbar systems, especially their current-carrying capacity, the dimensioning of the above-mentioned connection devices is no longer sufficient. For a current strength of 2.500 A it is necessary to increase the cross-section of the feeder and the dimensions of the lugs.

The object of the invention is to design a lug according to the preamble of claim 1 in such a way that conventional cable lugs or lugs can still be used with an increased current-carrying capacity.

This object is achieved by the features of the characterizing part of claim 1 . The other subclaims present particularly advantageous developments of the invention.

The core of the present invention is that: the lug has a plate shape that continues the flat legs, and two side wall surfaces perpendicular to the plate plane of the plate and parallel to the longitudinal continuation direction of the plate are constructed on both sides of the plate, At least two wiring through-holes are provided in each side wall surface and are opened transversely to the longitudinal continuation direction of the plate.

In busbar systems, the lugs according to the invention for the current taps are usually attached to each busbar, so that for each tap (center tap or end tap) the same number of lugs as there are busbars can be used.

The advantage of the device is not only its compactness but also its flexible arrangement of the cable terminations. By increasing the number of cable lugs or lugs, one can make the busbar system have a higher ampacity. Furthermore, the compact and dense structure of the lugs means that the lug-equipped busbar only needs to occupy a limited space within the busbar housing. This is of particular interest, since in this way flexibility with respect to the position of the neutral bus (N-Schiene) can be maintained. The space requirement does not change if the neutral busbar is selected to be arranged above, behind, below or in front of the busbar system.

Other features of the lug of the present invention are described by the following structural features that can be designed individually or in combination

Implementation form.

The at least two wiring penetrations in each side wall should be arranged one above the other relative to the board plane of the board. At least one further connection opening can be provided in each side wall. If two further connection openings are provided, they should be offset and equidistant from the first connection opening towards the busbar. At least one further cable lug or lug can also be fastened to these additional terminal openings. The lugs should be fastened to the busbar with a low ohmic value, preferably soldered to the busbar.

In a particular embodiment, the lug is designed as two parts. This design structure including the first wiring part and the second wiring part will be described in detail below.

The present invention and its extended design and improved design are described and illustrated in detail below with the help of the embodiment shown in the accompanying drawings, in the accompanying drawings:

Figure 1 shows an integral lug fixed on the busbar;

Figure 2 shows a lug of two-component structure;

Figure 3 shows a lug to which a cable lug or lug is fixed.

The lug according to the invention is preferably used for busbars in high-power busbar systems (current strength in the class of 2.500A). In such an application, up to five busbars (one neutral busbar and several live busbars) are accommodated in a busbar housing. For the current taps on the busbar, openings are usually provided in the busbar housing or tap boxes are used at these points.

FIG. 1 shows a lug 100 made of a highly conductive material, preferably copper, fastened to a busbar or busbar 70 . The lug 100 is formed at its first end 100 a as a flat leg, wherein the flat leg rests on the flat side of the busbar 70 . The length of the thickened plate section 120 of the lug 100 extends only in the region of the second end 100 b of the lug 100 . By virtue of the thickening of this plate segment, the lug also bears against the ground against the busbar. Such thickening achieves the desired high current carrying capacity. Preferably, in this position, the lug is welded to the busbar. Of course, other types of connections with the lowest possible ohmic values are also suitable. A center tap is shown in FIG. 1 , which means that the lug 100 can be fixed in a direction perpendicular to the longitudinal extension of the busbar. Another arrangement not shown in the figure is to fix the lug on the bus bar 70 as a terminal tap. In such a case, the lugs can be connected and fixed along the extending direction of the bus bar.

The lug has such a shape that two side wall surfaces 140 extending perpendicularly to the plane of the board 120 and parallel to the longitudinal direction of the terminal strip 100 are formed on both sides of the board 120 . Two wiring through holes 180 transverse to the longitudinal direction of the wiring sheet 100 are disposed in each sidewall 140 . The wiring through holes 180 are vertically stacked relative to the board 120 . End sections of power supply lines (preferably cables), which are generally designed in the form of cable lugs or lugs, can be fastened to the connection through-holes 180 . The feeder lines are not shown in the figure. Other wiring through holes 280 shifted toward the bus bar 70 relative to the aforementioned first wiring through holes 180 are provided in each sidewall.

A preferred embodiment of a lug of two-component construction is shown in FIG. 2 . The lug consists of two terminal parts 10 , 20 . Each connection element is composed of a flat leg 10', 20' and two side legs 12, 22, respectively. The two connection parts preferably differ with respect to the length of the respective flat legs 10', 20' and the arrangement of the lateral legs.

The first connection part 10 has three longitudinal sections LA1 , LA2 and LA3 which together form the overall length of the first connection part 10 . The flat leg 24 of the second connection part 20 has two longitudinal sections LB1 and LB2, the sum of the lengths of which constitutes the overall length of the second connection part 20. The total length (LA1+LA2+LA3) of the first connection member 10 is greater than the total length (LB1+LB2) of the second connection member 20 by substantially the length of the longitudinal section LA1 resting on the busbar.

Two side legs 12 , 22 are respectively formed on the respective flat legs of the two connection elements 10 , 20 , which are folded over on both sides of the flat legs 14 , 24 perpendicularly to the plane of the flat legs. out and parallel to the direction of longitudinal continuation of the flat legs. The longitudinal section LA3 on the first connection part 10 and the longitudinal section LB2 on the second connection part 20 form a U-shape. The bottom of each U-shape is equivalent to a respective middle block. The parallel distances of the side legs on the two wiring components are consistent with each other. The side legs are respectively fastened to the longitudinal sections by means of bridge sections S. Each bridging segment S is shorter than the side legs. The bridging section S on the first connecting part 10 is configured close to the busbar, while the bridging section S on the second connecting part 20 is configured away from the busbar. With such a design, the two terminal parts are mounted matingly so that the bases of the two U-shaped sections, that is to say the middle pieces, are placed on top of each other and their respective side legs 12, 22 are opposite to each other in this state position. stick out. There are two mounting position states following this mounting instruction. In the first position, the inner sides of the two flat legs 10 ′, 20 ′ are pressed against each other, as shown in FIG. 3 . In a second position, not shown, the outer sides of the two flat legs 10', 20' are pressed against each other. The two connection parts can be connected to one another in a highly conductive manner, wherein various suitable connection methods can be used: welding, soldering, screwing or riveting. Fixing holes 16 for bolting or riveting are provided in the first and second connection parts.

FIG. 3 shows eight cable lugs or lugs 60 fastened to the lug of the embodiment shown in FIG. 2 . Compared to FIG. 2 , the lug shown in FIG. 3 is fastened to the underside of the flat busbar. Therefore, a lug 60 having a conventional wire cross-section can be used. As the number of cable lugs or lugs doubles, the conductor cross-section increases. The wire lug can be screwed or riveted through the wire hole 18 . In FIG. 3 , the contact rings 62 of the individual lugs 60 are in flat contact with each other. The crimped sections 64 of the individual wire lugs then lie side by side with one another.

It can be seen from FIG. 3 that the first connecting member 10 ′ is laid flat on the bus bar 70 , and the second connecting member 20 ′ is abutted against the bus bar against the ground. Thus, the cross-sections of the two terminal members cooperate to facilitate the transfer of current, just like the one-piece lug shown in FIG. 1 .

Such an arrangement is not shown in FIG. 3 , that is, at this time, additional wire lugs are fixed on the rear connection hole 28 . Such an arrangement will be apparent to those skilled in the art. This additional lug can have a bent or bent shape.

List of reference signs:

100 lugs

100a, 100b first and second flat leg ends

110 Vertical continuation direction

120 board

140 side wall

180, 280 Wiring hole

10 The first wiring part

10a First board end

10b Second board terminal

11 Vertical continuation direction

12 side legs

14 middle block

18, 18' Wiring hole

28, 28' Wiring hole

LA1, LA2 longitudinal section

LA3

S bridge segment

20 The second wiring part

20a First board end

20b Second board end

22 side leg

24 middle block

16 fixed piercing

LB1, LB2 longitudinal section

60 Cable lugs or lugs

62 contact ring

64 curl section

70 busbars (neutral- and live busbars)

Claims (9)

1. one kind is used for feed line is connected to lug plate on the bus-bar, wherein, go up design at first end (100a) of this lug plate one flat leg is arranged, this flat leg is by being connected with this bus-bar (70) on the flat sides that is placed on a bus-bar (70), go up design at second end (100b) of this lug plate (100) one connector lug is arranged, design has at least one wiring that is used for fixing described feed line perforation (180 in this connector lug, 18), it is characterized in that, described connector lug has plate (120) shape of the described flat leg of continuity, be configured with two in the both sides of this plate (120) perpendicular to the board plane of this plate and be parallel to the side wall surface (140) of vertical continuity direction (110) of this plate (120), in each side wall surface (140), be provided with at least two wiring perforation (180) of offering transverse to vertical continuity direction (110) of described plate (120).

2. according to the described lug plate of claim 1, it is characterized in that described at least two wiring perforation (180) in each side wall surface (140) are arranged to stacked up and down with respect to the board plane of described plate (120).

3. according to the described lug plate of claim 2, it is characterized in that, in each side wall surface (140), be provided with at least another with respect to described first wiring wiring perforation (280) that (180) offset towards described bus-bar (70) of boring a hole.

4. according to each described lug plate in the claim 1 to 3, it is characterized in that described lug plate (100) is welded on the described bus-bar (70).

5. according to each described lug plate in the claim 1 to 4, it is characterized in that described lug plate (100) is fixed on the bus-bar (70) as centre tap.

6. according to each described lug plate in the claim 1 to 4, it is characterized in that tap is fixed on the bus-bar (70) described lug plate (100) as terminal.

7. according to each described lug plate in the claim 1 to 6, it is characterized in that, described lug plate is designed to two parts and is made up of one first connecting part (10) and one second connecting part (20), wherein, first connecting part (10) has three vertically section (LA1 by one, LA2, LA3) flat leg (10 ') constitutes, wherein, described first vertical section (LA1) is arranged for the flat sides of described bus-bar (70) and is connected, the described the 3rd vertical section (LA3) constitutes the bottom (14) of one the one U type portion section (70) away from described bus-bar, in the middle of described being positioned at second vertically section (LA2) then limits the spacing of a U type portion section apart from described bus-bar (70), vertically be configured with two side legs (12) on the section (LA3) at the 3rd of described first connecting part (10), these two side legs bend out and are parallel to vertical continuity direction ground extension of the described the 3rd vertical section (LA3) perpendicular to the 3rd vertical section (LA3) plane earth flange in the both sides of the described the 3rd vertical section (LA3), wherein, described second connecting part (20) has two vertically section (LB1 by one, LB2) flat leg (20 ') constitutes, these two vertical section (LB1, LB2) length respectively with the vertical equal in length of section (LA3) of the interlude (LA2) of described first connecting part (10) and the 3rd, wherein, second vertical section (LB2) constitutes the bottom (24) of one the 2nd U type portion section, vertically be configured with two side legs (22) on the section (LB2) at second of described second connecting part (20), these two side legs bend out and are parallel to vertical continuity direction ground extension of described second vertical section (LB2) perpendicular to this second vertical section (LB2) plane earth flange in the both sides of described second vertical section (LB2), and these two connecting parts (10,20) so relative installation, promptly, make described connecting part (10, flat leg 20) (10 ', 20 ') stacked up and down and when this state position their side legs (12,22) separately oppositely stretch out mutually.

8. according to the described lug plate of claim 7, it is characterized in that described two connecting parts (10,20) melting welding mutually, soldering, bolt connect or riveted joint.

9. according to the described lug plate of claim 8, it is characterized in that, in described two connecting parts (10,20), be provided with the fixedly perforation (16) that connects or rivet usefulness for bolt.