JPH08298706A - Main bus supporting mechanism of closed distribution panel - Google Patents

Abstract

PURPOSE: To provide the main bus supporting mechanism of a closed distribution panel for easily adjusting the connection of a main bus. CONSTITUTION: A main bus 8 is supported and fixed at the middle part of a mechanism consisting of a main bus fixing metal fittings 60 provided near the center of a panel width, an insulator 5, and an insulator supporting frame 40 and a space is provided at both side edge parts of the main bus 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main busbar support mechanism for a closed switchboard.

[0002]

2. Description of the Related Art A closed switchboard is generally used by connecting a plurality of units. 4A and 4B are views showing the structure of a main bus bar supporting mechanism in an intermediate panel located in the middle of a conventional closed switchboard, in which FIG. 4A is a top view and FIG. 4B is an arrow b in FIG. The front view seen from the direction, and (c) is the side view seen from the direction of arrow c in (a). Further, FIG. 5 is a diagram showing a configuration of a main bus bar supporting mechanism in an end plate located at an end of a conventional closed switchboard, where (a) of FIG. 5 is a top view and (b) is an arrow of (a). It is the front view seen from the direction of b.

In FIGS. 4 and 5, 1 is a housing of a closed switchboard, 2 is a welded or bolted first frame provided on the closed switchboard side for supporting a main bus bar, and 3 is this first frame. A second frame fixed to the first frame 2 by bolting, and 3a in FIG. 5 is a second frame fixed to the second frame 2 by bolting at the end of the end plate.

Reference numeral 5 denotes an insulator for supporting the main bus bar 8, 6 denotes a main bus bar receiving insulator fixing member fixed to the insulator 5 for receiving the main bus bar 8, and 6a in FIG. 5 receives the main bus bar 8 on the end plate. It is a main busbar receiving insulator fixing metal member fixed to the insulator 5 for this purpose.

In the end panel shown in FIG. 5, the main bus bar 8 is fixed to the main bus bar receiver insulator fixing member 6a by, for example, bolting. On the other hand, in the intermediate board shown in FIG. 4, the main bus bar 8 is fixed by being sandwiched between the main bus bar receiver insulator fixing bracket 6 and the pressing bracket 7 each having a slit for receiving the main bus bar 8 as shown in the figure. ing. Moreover, 9a and 9b of FIG. 5 respectively show the end plates of the ends of a plurality of connected units.

[0006]

In the conventional closed switchboard provided with the main busbar support mechanism constructed as described above, the main busbar support position is at the end of the switchboard, and the main busbar connecting portion is further provided. There is no space for connecting the main busbars at the end, it is difficult to connect the main busbars, and in the end panel and the intermediate panel of the closed switchboards (row panels) that have multiple connections, the main busbars and Since the support structure of the main bus is different,
There were problems that the main busbar and the main busbar support structure of the end panel had to be replaced with the structure of the intermediate panel when the distribution board was added, and that the main busbar was difficult to connect.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a main busbar support mechanism for a closed switchboard which facilitates the work of connecting the main busbars.

[0008]

In view of the above object, the first invention of the present invention is characterized in that the main busbar is supported and fixed by one insulator each near the center of the width of the closed switchboard. It is in the main bus bar support mechanism of the switchboard.

According to a second aspect of the present invention, both ends of each main bus bar are separated from the ground metal of the switchboard by at least the minimum insulation distance between the ground and the main switchboard of the closed switchboard according to claim 1. It is in the busbar support mechanism.

[0010]

In the first aspect of the present invention, the main bus bar is supported at the intermediate portion, and the space is secured at both end portions of the main bus bar which is the main bus bar connecting portion.

Further, in the second aspect of the present invention, both ends of the main busbar are separated from the ground metal of the switchboard by a minimum insulation distance to ground or more so that the endboard and the intermediate board have the same structure. did.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. FIG. 1 is a view showing a closed switchboard equipped with a main bus bar support mechanism according to an embodiment of the present invention. 1A is a top view, FIG. 1B is a front view seen from the direction of arrow b in FIG.
(c) is a side view seen from the direction of arrow c in (a). Portions indicated by the same reference numerals as in the related art indicate the same or corresponding portions.

In FIG. 1, reference numeral 20 denotes a main busbar support frame for supporting the main busbars 8, which is provided on the closed switchboard side and is welded or bolted, and 30 is fixed to the main busbar support frame 20 by bolting. It is an in-board support frame.

Reference numeral 40 denotes an insulator support frame fixed to the in-board support frame 30. The insulator support frame 40 is provided in the middle part of the board (for example, near the center of the board width). The insulator support frame 40 is provided with one insulator 5 for each phase of the main bus bar 8. Reference numeral 60 is a main busbar fixing metal fitting for supporting and fixing the main busbars 8 by bolting at the respective intermediate portions.

In this way, the main bus bar fixing bracket 60 and the insulator 5
Further, by supporting and fixing the main bus bar 8 at the intermediate portion by the configuration of each frame 20, 30, 40, it is possible to secure a space at the main bus bar connection points at both ends of the main bus bar 8, and the connection work becomes easy. It goes without saying that it is desirable to make the width of the insulator support frame 40 as narrow as possible.

In the above embodiment, the main bus bar 8 is directly bolted with the main bus bar fixing bracket 60, but as shown in FIG. 2, the main bus bar 8 is fixed at two points by the U-shaped main bus bar supporting bracket 61 and the pressing bracket 62. You may do it.

FIG. 2A is a front view, and FIG. 2B is an arrow b of FIG.
It is the side view seen from the direction. In this embodiment, a U-shaped main busbar support fitting 61 and two pressing fittings 62 each having a slit for receiving the main busbar 8 as shown in the drawing are used to support the main busbar 8 at two positions. Main bus bar 8 in a more stable state by fixing
Is supported and fixed. Note that the number of fixing points is not limited to two, but the number of supporting points can be increased by forming the main bus bar support metal fitting 61 in a comb shape.

Example 2. FIG. 3 shows a closed switchboard having a main bus bar support mechanism according to another embodiment of the present invention. 3A is a top view, FIG. 3B is a front view seen from the direction of arrow b in FIG. 3A, and FIG. 3C is a side view seen from the direction of arrow c in FIG.

In this embodiment, as shown in the figure, the main bus bar 8a
However, in consideration of the work space and the structure of the end plate, the end portion is set to have a length that is separated from the ground metal of the end plate, that is, here, the housing 1 by at least the minimum ground insulation distance. This allows multiple connected units
The main busbar support mechanism can be of the same structure for both the end panel and the intermediate panel of the (row panel) (see FIGS. 4 and 5 of the prior art).
Expansion work becomes easy.

[0020]

As described above, according to the first aspect of the present invention, since the main bus bar is supported and fixed by the mechanism including the insulator provided in the middle portion and each frame, the end part of the main bus bar is fixed. Since there is space in the connection point of the, the connection work is easy, and the distance between the support point of the main bus bar and the connection point of the conductor (the end of the main bus bar) has become long, the deflection of the main bus bar It is possible to provide an effect that a main bus bar supporting mechanism of a closed switchboard whose position can be easily adjusted can be provided.

Further, according to the second aspect of the present invention, the length of the main bus bar is set such that both ends thereof are separated from the ground metal of the board by at least the minimum insulation distance to ground. The same structure can be used for the end panel and the intermediate panel of the row board, and the expansion work is easy. Also, the main busbar connection work can be done inside the board, so the connection adjustment on site is easy. The effect of providing a main busbar support mechanism for the switchboard can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a closed switchboard provided with a main bus bar support mechanism according to an embodiment of the present invention.

FIG. 2 is a view showing a modified example of the main bus bar support mechanism of FIG.

FIG. 3 is a diagram showing a configuration of a closed switchboard equipped with a main bus bar support mechanism according to another embodiment of the present invention.

FIG. 4 is a view showing a conventional main bus bar supporting mechanism of an intermediate board.

FIG. 5 is a view showing a conventional main bus bar support mechanism of an end plate.

[Explanation of symbols]

1 housing, 5 insulators, 8 main busbars, 20 main busbar support frames, 30 inboard support frames, 40 insulator support frames, 60 main busbar fixing brackets, 61 main busbar support brackets,
62 Holding metal fittings.

Claims (2)

[Claims] 1. A main busbar support mechanism for a closed switchboard, wherein the main busbar is supported and fixed by a single insulator in the vicinity of the center of the width of the closed switchboard. 2. The main busbar support mechanism for a closed switchboard according to claim 1, wherein both ends of each main busbar are separated from a ground metal of the switchboard by a minimum insulation distance or more from the ground.