JP2591701Y2 - Bus duct connection - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting portion of a bus duct.

[0002]

2. Description of the Related Art A bare conductor bus duct has a copper or aluminum rectangular conductor (bus bar) fitted and supported in a groove of a heat-resistant insulating support, and these are arranged in a duct made of a steel plate or an aluminum plate. Because it is relatively resistant to adverse environments, it is often used as a plug-in trunk for factories.

[0003] As shown in FIG. 3, the interval between the support grooves 3 of the insulating support 2 in such a bus duct 1, that is, the arrangement interval p of the bus bars 4 of each phase is usually unified to, for example, 60 mm in each bus duct 1. And the distance a between the outermost support groove 3 and the side plate 5 is also equal in each bus duct 1, so that at the connection portion of the bus duct 1, the end of the bus bar 4 on one side of each bus duct 1 The back bar is formed to form the stepped portion 6, and the ends of these bus bars 4 are
Each of the adjacent bus ducts 1 is overlapped with the end of the bus bar 4 having no step, and each phase is fastened with several connecting bolts 7 or the like.

[0004]

However, in such a connection portion of the bus duct, since the end of the bus bar 4 of each phase is cut off, much time and work costs are required, and the cost of the entire bus duct 1 is reduced. There was a problem of getting high.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it does not require time and cost for processing the end portion of the bus bar, and can perform a connecting operation of a bus duct inexpensively and efficiently. The purpose is to provide.

[0006]

According to the present invention, a connecting portion of a bus duct is a connecting portion of a bus duct in which ends of busbars of the same phase of a bus duct are overlapped with each other, and each phase of the busbar is connected to an adjacent bus duct. In each of the above, it is supported at a position shifted in the thickness direction by the thickness of the bus bar by the insulating support body, and these bus bar ends should be connected by overlapping without forming a stepped part at the ends It is characterized by.

[0007]

In the connection part of the bus duct of the present invention, the bus bars of each phase in the bus ducts adjacent to each other are shifted in the thickness direction by the thickness of the bus bar by the insulating support members which support the bus bars at a distance. Since the ends of the busbars are supported and connected in-phase for each phase, there is no need to perform back-cutting on one end of the busbar, reducing the time and cost required for processing, The time and cost required for the entire operation are reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially sectional plan view showing an embodiment of a connecting portion of a bus duct according to the present invention, showing a state in which a cover plate is removed. In FIG. 1, the same parts as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

In the embodiment, in the adjacent bus duct 1, the support grooves 3 of the insulating support 2 are disposed at positions shifted from each other in the thickness direction (horizontal horizontal direction) by the thickness of the bus bar 4, for example, 6 mm. The bus bars 4 of each phase are sandwiched between the support grooves 3.

That is, in the intermediate bus duct A-2, the distance between the support grooves 3 conventionally used is p (for example, 60 m).
m), the bus bar 4 of each phase is supported by the insulating support 2 having the distance a between the outermost support groove 3 and the side plate 5, and the bus ducts A- adjacent to the front and rear sides of the bus duct A-2. 1 and A-3, the distance between the three support grooves 3 is the same as that of the insulating support of the bus duct A-2, p (60).
mm), the arrangement position of each support groove 3 is
The bus bar 4 of each phase is supported by the insulating support 2 shifted in the thickness direction shown by the thickness t (6 mm) in the drawing. The ends of the bus bars 4 of each phase of the adjacent bus duct 1 supported in this manner are overlapped with each other without forming a stepped portion, and are fastened and connected by connection bolts 7 or the like.

At the connecting portion of the bus duct of the embodiment constructed as described above, the ends of the bus bars 4 of the respective phases of the bus duct 1 to be connected are overlapped as they are and fastened by connecting bolts 7 or the like. It is not necessary to form a stepped portion by performing a spinning process on the end of the bus bar 4, and the time and cost required for the process can be reduced.

Next, another embodiment of the present invention will be described.

In this embodiment, as shown in FIG. 2, the bus bar 4 is located at a normal position in all the bus ducts 1.
Insulating support 2 provided with a wide groove 8 having a width twice as thick as
Are provided, and such a wide groove 8 of the insulating support 2 is provided.
The bus bars 4 of each phase are accommodated and supported respectively. Then, the ends of the bus bars 4 of the respective phases are superimposed on each other as they are, and they are tightened and connected by connecting bolts 7 or the like.

In the connecting portion of the bus duct of the embodiment constructed as described above, in the insulating support 2 of each bus duct 1, the wide groove 8 having twice the width of the normal supporting groove 3 is located at the same position as the conventional one. Since the bus bars 4 are arranged at intervals, the bus bar 4 of each phase is connected to the bus ducts 1 on both sides to be connected.
Each of them can be supported at a position in the wide groove 8 which is shifted from each other by the thickness of the bus bar 4 in the thickness direction. Then, the ends of the bus bars 4 of these phases can be overlapped and connected without forming a stepped portion.

[0016]

As described above, according to the connecting portion of the bus duct of the present invention, the bus bar end can be processed by being overlapped and connected without forming a stepped portion at the end of the bus bar. The connection work can be performed inexpensively and efficiently without requiring much time and cost.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view showing one embodiment of a connecting portion of a bus duct according to the present invention.

FIG. 2 is a partial sectional plan view showing another embodiment of the present invention.

FIG. 3 is a partial cross-sectional plan view showing a connection part of a conventional bus duct.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bus duct 2 ... Insulating support 3 ... Support groove 4 ... Bus bar 5 ... Side plate 6 ... Stepped part 7 ... Connection bolt 8 ... Wide groove

Claims (1)

(57) [Scope of request for utility model registration] In a bus duct connecting portion formed by superposing and connecting the ends of in-phase bus bars of a bus duct, each phase of the bus bar is connected to an adjacent bus duct by an insulating support so as to correspond to the thickness of the bus bar. A connection portion for a bus duct, which is supported at a position shifted in the thickness direction and is connected by being overlapped as it is without forming a stepped portion at the ends of these bus bars.