JPH0140269Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a connecting portion of a bus duct in which the line extension direction and arrangement direction of a three-phase parallel busbar group are each changed by 90 degrees.

[Technical background of the invention and its problems] When connecting bus ducts in which busbars are arranged in three phases in parallel, the line extension direction and arrangement direction of the busbar groups arranged in three phases in parallel are determined respectively due to the layout of the equipment.
It may be necessary to connect by converting it 90 degrees.

Figure 1 shows the connection state of conventional busbars in such a connection part, and numerals 1 and 2 respectively indicate a group of three-phase parallel busbars extending upward from a distribution board (not shown). There is.

As shown in the figure, the busbars of the busbar groups 1 and 2 are connected by the busbars of the connection busbar group 3 which are bent into a U-shape.

However, in such a conventional connection, the connection bus bar group 3 is formed in a U-shape and the route length is long, so the connection requires a lot of space and has an impact on other wiring, piping, etc. In addition, there was a drawback that the price of the bus duct itself and the construction cost increased. Furthermore, due to the design, there were many points of contact with other equipment, piping, etc., which was a disadvantage.

[Purpose of the invention] The present invention was made in order to solve these conventional difficulties. The purpose is to provide a connection part that has a good space factor for a bus duct connected in a straight line and requires fewer points of contact with other equipment, piping, etc.

[Summary of the invention] In other words, the connection part of the bus duct of the invention is such that the terminals of each busbar of the first busbar group arranged in three phases in parallel are each converted by 90 degrees in the extension direction and arrangement direction with respect to the first busbar group. At the connection point where the terminals of the second busbar group arranged in parallel in three phases are connected, the terminals of each busbar of the first busbar group are bent by 90 degrees, and the terminals of the second busbar group are The terminals of the first busbars of the outermost first busbar group are in surface contact with the outermost first busbars of the second busbar group, and the terminals of the second busbars of the first busbar group are in surface contact with the outermost first busbars of the second busbar group. the terminal is in surface contact with the second busbar located at the center of the second busbar group,
The terminals of the third busbars of the first busbar group that are innermost with respect to the second busbar group are sequentially positioned in the longitudinal direction so that they are in surface contact with the third busbars that are innermost of the second busbar group. The bus bars are arranged in a staggered manner, and the contact portions of each bus bar are connected.

[Embodiment of the invention] The details of one embodiment shown in the drawings will be explained below.

In Figures 2 to 4, the reference numeral 4 indicates a busbar 4 composed of two busbar units each.
The first busbar group has R, 4S, and 4T arranged in parallel in three phases with a predetermined insulation interval, and the reference numeral 5 indicates busbars 5R, 5 that are composed of two busbar units each.
A second busbar group is shown in which the arrangement direction and wire extension direction of S and 5T are respectively converted by 90 degrees from the first busbar group 4.

However, the busbar 5R of the second busbar group 5,
At each end of each of the busbars 5S and 5T, as shown in the figure, the R-phase busbar 5R is bent inward at right angles, and its busbar units are stacked alternately with the busbar units of the corresponding busbars 4R of the first busbar group 4. and the S-phase busbar 5S is the R-phase busbar 5S.
It is bent outward to avoid the tip of R, then inward in front of the R-phase bus bar 5R, and in front of that, it is bent again parallel to the line extension direction.
The corresponding busbars 4S and busbar units of the busbar group 4 are alternately stacked. Further, the T-phase busbar 5T is bent further outward to avoid the S-phase busbar 5S, and in front of it is bent again parallel to the wire extension direction, and is further bent from the bent part of the S-phase busbar 5S. The busbars 4T and the busbar units corresponding to the first busbar group 4 are bent inward at right angles in the front direction in the line extension direction and are alternately stacked.

Although not shown, each bus bar 4R to 4T
And in the laminated part of the tip of 5R to 5T,
Bolt insertion holes are drilled through the laminated part, and bolts 6R to 6T are inserted into these bolt insertion holes.
is inserted, and a nut is screwed onto this bolt to tighten and fix the stacked parts together. In the figure, numeral 7 is an insulating spacing plate for fixing each bus bar, 8 is a bus duct case, and 9 is a removable lid of the bus duct case.

Although only one bent portion has been described in the above embodiment, it is of course possible to form a connection portion having a similar configuration at the other end of the first busbar group in the illustrated embodiment.

[Effect of the invention] As explained above, in the connection part of the bus duct of the invention, the direction of wire extension and the arrangement direction of the busbars can be adjusted.
Busbar groups converted by 90 degrees can be connected linearly, so the route length of the connection busbar group can be shortened, and the space required is reduced, reducing the impact on other wiring and piping, etc. The main unit price and construction cost can be reduced. Another advantage is that there are fewer points of contact with other equipment, piping, etc. due to the design.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a connection state of a busbar group at a connection part of a bus duct arranged by changing the conventional line extension direction and arrangement direction by 90 degrees, respectively;
FIG. 2 is a perspective view showing a connection state of a wiring busbar group according to an embodiment of the present invention, FIG. 3 is a view taken from the direction of FIG. 2, and FIG. 4 is a side view thereof. 4...First busbar group, 5...Second busbar group, 4R, 4S, 4T, 5R, 5S, 5T...
Bus bar, 6R to 6T... Bolt, 7... Insulating spacing plate, 8... Bus duct case.

Claims (1)

[Scope of utility model registration request] The terminals of the second busbar group, which are arranged in parallel in three phases, are connected to the terminals of each busbar in the first busbar group, which is arranged in parallel in three phases, by changing the extension direction and the arrangement direction by 90 degrees from the first busbar group. At the connecting portion, the terminal of each busbar of the first busbar group is bent by 90 degrees, and the terminal of the first busbar of the first busbar group that is outermost with respect to the second busbar group is bent. is in surface contact with the first busbar located at the outermost side of the second busbar group, and the terminal of the second busbar located at the center of the first busbar group is in surface contact with the terminal of the second busbar located at the center of the second busbar group. The terminal of the third busbar of the first busbar group that is innermost with respect to the second busbar group is in surface contact with the third busbar that is innermost of the second busbar group. A connection part of a bus duct characterized in that the contact parts of each bus bar are connected so as to be sequentially shifted in the longitudinal direction.