JPH0140258Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a closed switchboard, and particularly to a structure for arranging busbars that pass through a row of panels.

[Technical background of the invention and its problems]

In general, a closed power distribution board is constructed by combining unit boards for power reception, power distribution, busbar connection, etc. by the main circuit system, and is arranged in rows of boards.

In addition, as the closed switchboards are becoming smaller and the disconnectors housed inside, the installation floor space has been reduced by stacking them in multiple stages. Measures to prevent fire from spreading to adjacent panels have also become an important issue.

FIG. 1 shows a side view of a closed switchboard related to the present invention in which a sheath breaker 2 is housed in a box 1. In the same figure, a busbar 3 is connected to an adjacent panel in the rear busbar chamber of the box 1. A branch conductor 4 branches upward and downward from this bus bar 3 and is connected to the upper and lower sheath breakers 2, 2.

FIG. 2 is a sectional view taken along the line AA in FIG. 1 and shows a conventional configuration. In the same figure, boxes 1A, 1B, which are placed side by side,
Openings 5 are provided on both sides of 1C,
The busbar 3 passes through this opening 5, and the box bodies 1A, 1B
and fixed by the insulator 6 attached to 1C,
A branch conductor 4 branches vertically from the branch part 7.

However, the closed switchboard constructed in this manner has the following problems.

(1) When transporting a closed switchboard, the busbar 3 is separated from the box 1 in order to divide the panel configuration into one or several sides.
must be removed from the container and packed separately.

(2) It is difficult to install the removed busbar 3 during on-site installation work because the busbar 3 is located somewhat in the center of the closed switchboard as shown in Figure 1. In the case of attaching the busbar 3, the work time will be longer.

(3) If a fire breaks out in a panel in the row of panels for some reason (for example, when the epoxy resin covering the conductor burns), there is a risk that the fire will spread to adjacent panels through the opening 5. There is.

[Purpose of invention]

The purpose of the present invention is to provide a closed switchboard that does not require the removal of busbars that penetrate between rows of panels during transportation, and that even if a fire occurs in the busbar room, the fire will not spread to adjacent panels.

[Summary of the idea]

The present invention is a closed power distribution board in which a concave partition is provided on one side of the box body of the closed power distribution board, and a bus bar is passed through this partition.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIG.

In the figure, the openings 5 of the boxes 1A, 1B, and 1C are provided with a metal partition plate 11 whose circumference is bent into an L shape, and an insulating bushing 12 is inserted through the partition plate 11. It is being Also, box body 1
The insulators 6 are attached to the insulators A, 1B and 1C, and the boxes 1A, 1B and 1C are attached to each insulating bushing 12.
Generatrix 13A, which is equal to or slightly shorter than the width of 1C,
13B and 13C are fixed with insulators 6 so as not to protrude from the sides of the boxes 1A, 1B and 1C, respectively.

Further, connection pieces 14 are attached to the terminals of the bus bars 13A, 13B and 13C, and each bus bar 13A, 1
3B and 13C are connected by bolts 15, and when the closed switchboard is to be disconnected, all that is required is to remove the bolts 15 tightening this connection piece 14 and turn it over as shown in FIG. 4, for example. There is.

[Effects of Examples]

Since the present invention is configured as described above,
It has the following effects.

(1) When transporting a closed switchboard, it can be disconnected at any point in the panel configuration, there is no need to remove the busbars, and therefore there is no need to package the busbars separately.
Furthermore, since the busbar does not protrude from the separated unit board, the packaged external size of the closed switchboard does not become large.

(2) During on-site installation, there is no need to install long busbars;
Since it is only necessary to tighten the connection piece, installation time can be shortened.

(3) Since the opening through which the bus bar passes is partitioned with a metal partition plate, it is possible to prevent a fire that occurs within a certain panel from spreading.

In addition, in the above example, the length of the bus bar was explained as an example in which the length of the bus bar was cut for each box width, but if the separation location during transportation is determined in advance, the length of the bus bar can be cut for each board width of each transportation unit. In this case, there are fewer places to tighten the connecting pieces, so there is an advantage that the on-site installation work time can be further shortened.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the configuration of a conventional closed switchboard, Fig. 2 is a sectional view showing the conventional structure along line A-A in Fig. 1, and Fig. 3 shows an embodiment of the present invention. The sectional view, FIG. 4, is a partially detailed view showing the operation of the present invention. 1... Box of closed switchboard, 5... Opening, 6...
...insulator, 11...partition plate, 12...insulating bushing, 13A, 13B, 13C...bus bar.

Claims (1)

[Scope of utility model registration request] In a closed power distribution board arranged in a row and having a plurality of busbars connected thereto, each closed power distribution board is provided with a concave part recessed inwardly on one side of the power distribution board, and a first busbar support that penetrates through this recess, and a first bus bar support in the closed power distribution board. A closed power distribution board that supports the bus bars of each closed power distribution board with a second bus support provided therein, connects a connecting piece to the bus bar end in the recessed part, and connects the busbars in the vicinity of the recessed part by this connecting piece. .