JPS6230416Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a closed power distribution board characterized by the pull-out structure of the cutter and disconnector and the arrangement position of the main circuit equipment.

Hereinafter, the structure of a conventional closed switchboard will be explained based on FIGS. 1 and 2. In the figure, 1 is the wall of the electrical room, 2 is the closed switchboard, 3 is the main bus, 4 is the disconnector, 5 is the disconnector, 6 is the instrument current transformer, 7 is the main circuit conductor, and 8 is the main circuit. A power cable, 9 a front door, and 10 a rear cover.

In a conventional closed switchboard, when the load is to be stopped, the bottom circuit breaker 5 is opened, the front door 9 is opened, and the disconnector 4 is opened to complete the opening of the main circuit. Further, maintenance and inspection of the main circuit conductor 7 and connection of the main circuit power cable 8 are performed by removing the rear cover 10.

Conventional closed switchboards are configured as described above, so the depth of the panel is large, and maintenance, inspection, and installation work must be done from the rear by removing the rear cover, so space at the rear of the closed switchboard must be secured. If a closed switchboard is installed in an electrical room, it requires a large area including space for maintenance and inspection, which has the disadvantage that it can only be installed in a large electrical room.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above. The other side of the panel is placed without a partition, and the insert/drawer extension rails for pulling out the switch to the front of the panel are provided on the bottom of the switch and the side of the one side. It is an object of the present invention to provide a closed power distribution board that can reduce the depth dimension, enable front maintenance and inspection, and reduce the occupied area including the maintenance and inspection space.

An embodiment of this invention will be described below with reference to the drawings. In Figures 3 to 6, the wall 1, main busbar 3, breaker 5, instrument current transformer 6, and main circuit power cable 8 are the same as the conventional ones in Figures 1 and 2. . Reference numeral 12 designates a thin wall-mounted closed switchboard, 13 designates an integrated instrument panel, and 14 designates an insertion drawer extension rail provided on the bottom and one side of the edge and disconnector 5, respectively.

In the closed switchboard 12 of the embodiment of this invention constructed as described above, the insertion/drawer extension rail 14 is provided on one side and the bottom of the shingle disconnector 5 and is placed on one side of the panel to pull out the shingle disconnector. As a result, the main circuit equipment inside the panel can be maintained, inspected, and installed from the front of the panel, and it is also possible to use an insulated bus bar for the main circuit conductor 7 and place the main circuit equipment on the side opposite to where the disconnector 5 is located. Because of this, the depth of the panel is thinner and it can be installed as a wall-hung type on one wall of the electrical room.
Also, the space at the rear of the closed switchboard is not required. It should be noted that although the above embodiment is combined with the integrated instrument panel 13 as shown in FIG. 3, it goes without saying that the present invention is not limited to this.

As described above, according to this invention, the insert/drawer extension rail is installed on one side of the board and on the bottom of the board and on the one side of the board to pull out the board/breaker to the front of the panel. By arranging it on the side, it is possible to install the insertion drawer extension rail on the bottom as close to the one side as possible while preventing the disconnector from falling over, and the main circuit equipment of the panel can be placed on the other side of the panel. This makes it possible to reduce the depth of the panel and enable maintenance and inspection from the front, making it possible to provide a closed switchboard that occupies a reduced area including the maintenance and inspection space.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the arrangement of a conventional closed switchboard in an electrical room, Fig. 2 is a sectional view showing the structure inside the closed switchboard in Fig. 1, and Fig. 3 is a closed switchboard according to an embodiment of this invention. FIG. 4 is a sectional view showing the arrangement inside the closed switchboard in FIG. 3; FIG. 5 is a sectional view taken along the line - in FIG. 4; FIG. 6 is a sectional view taken along the line in FIG. It is a sectional view along -. In the figure, 5 is a branch and a disconnector, 12 is a closed switchboard, and 14 is an insertion/drawer extension rail. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a device configured such that the shroud breaker can be pulled out to the front of the panel via an insertion drawer extension rail, the shredder breaker is placed on one side of the panel. The main circuit equipment to be connected to the main circuit conductor in the panel shall be installed on the other side of the panel without any partitions, and the insertion drawer extension rail shall be installed on the bottom of the shield and on the side of the one side. A closed switchboard characterized by the provision of a closed switchboard. (2) The closed power distribution board according to claim 1 of the utility model registration claim, characterized in that an insulated bus bar is used as the main circuit conductor.