JPH0343766Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a double-bus type closed switchboard, and particularly to one in which the arrangement of the power supply bus room and the breaker room is improved.

A closed switchboard with double bus bar system has two different systems.
This system uses two busbars and is used to properly distribute the load on the feeder line and to deal with power outages or inspections of one busbar, and has conventionally been configured as shown in FIG.
That is, in the figure, 1 is a casing made of grounded metal, and the inside of this casing 1 is roughly divided into two chambers, a disconnection chamber 3 and a busbar chamber 4, by a vertical partition wall 2. Chamber 4 has its upper and lower parts L.
The upper busbar chamber 4a, the cable chamber 4b and the lower busbar chamber 4 are surrounded by shaped partition walls 5 and 6.
It is classified as c. The drawer-type disconnector 7 with upper and lower terminals 7a and 7b is housed in the disconnector chamber 3, and the busbar chamber 4 houses the first power supply bus 8, the load cable 9, and the 2 power bus 1
0 are stored in the upper busbar chamber 4a, the cable chamber 4b, and the lower busbar chamber 4c, respectively, and the terminals 8a, 1 of the first and second power busbars 8, 10
0a and the terminal 9a of the load cable 9 are connected to the cable chamber 4b at a position corresponding to the upper terminal 7a of the drawer-shaped disconnector 7 placed on the floor of the disconnector chamber 3. At the same time, the terminal 8a of the first power supply bus 8 is spaced upwardly from the terminal 9a of the load cable 9 by a distance equal to the distance between both terminals 7a, 7b of the drawer type or disconnector 7. It is arranged in the busbar room 4a, and the terminal 10a of the second power supply busbar 10 is separated downward from the terminal 9a of the load cable 9 by a distance equal to the distance between both terminals 7a, 7b of the drawer type or disconnector 7. Lower bus bar room 4
This is located in c.

When switching the power supply bus to the first power supply bus 8 in such a conventional double-bus closed switchboard,
This is done by moving the drawer or disconnector 7 up and down using a lifting device (not shown). However, since the elevating device usually uses a wargear, the backlash of the wargear significantly impedes the fitting accuracy between the drawer type or disconnector terminal plug and the terminal of the power bus bar, etc., resulting in poor contact between both terminals. There was a risk of an accident occurring. In addition, it is normal to install a pressure relief device on the ceiling of the housing in case of a short circuit accident on the bus bar, etc., but if a short circuit accident occurs on the second power supply bus bar 10, the pressure relief device in the lower bus bar room 4c is installed. Since no device can be provided, there are problems such as it becomes extremely difficult to release the internal abnormal pressure gas in the lower busbar chamber 4c.

The present invention was developed in view of the above-mentioned problems, and its purpose is to improve the layout of each power bus room and disconnection room to prevent short-circuit accidents in each power bus room, etc. To provide a double bus system closed power distribution board which can easily release the pressure inside the panel and can always maintain good connection between a drawer type or disconnector and a power supply bus bar, etc.
Hereinafter, embodiments of this invention will be described in detail using the drawings from FIG. 2 onwards.

Double-bus closed switchboard 11 according to the present invention
is used in a row-by-side configuration as shown in Fig. 2, and inside the case 12 made of grounded metal, there is a predetermined space near the middle part as shown in Figs. 2 and 3. A pair of vertical partition walls 13, 13 facing each other with an interval of
3 and vertical partition walls 1 arranged perpendicularly to each other.
4, 14 are interposed between the shafts and disconnection chambers 15 and 15 are defined on both left and right sides, and each shaft and disconnection chamber 15,
Cable chambers 16, 16 are respectively defined on the back of the cable chambers 15 (on the right side in FIG.
The first and second horizontally extending in the same direction as the arrangement direction of
Busbar chambers 17 and 18 are defined adjacent to each other in order from the side of the disconnection chamber 15.

An upper rail 20a and a lower rail 20 are provided on both sides of each shelf and disconnector chamber 15 to allow the drawer and disconnector 19 to be movably placed in either the upper or lower two stages.
b extends horizontally near the middle part and at the bottom of each shelf and disconnection chamber 15 without interfering with the communication between the upper and lower sides. Corresponding doors 21a, 21b are provided. And each room disconnection room 15 and cable room 1
The vertical partition wall 14 that defines the upper rail 20a has first and second upper terminals (not shown) connected to the upper and lower terminals 19a and 19b of the drawer type and disconnector 19 placed on the upper rail 20a. (omitted) is bushing 22
a, 22b, and is placed on the lower rail 20b.
First and second terminals (not shown) in the lower stage, which are connected to the upper and lower terminals 19a and 19b, are provided through bushings 23a and 23b in the same manner as in the upper stage.

Note that the first and second terminals of the upper and lower stages are provided so as to be freely shieldable via shutters 24a, 24b, 25a, and 25b that operate in accordance with the forward and backward movement of the drawer type and disconnector 19. A pressure relief device 26 is mounted on the ceiling of each of the breaker chambers 15. Also, in Figures 2 and 3, 27
Reference numerals a and 27b are shield plates vertically disposed at the upper and lower stages of the shield disconnection chamber 15, respectively.

The first and second busbar chambers 17 and 18 house first and second power supply busbars 28 and 29 of different systems. Then, the first and second power supply buses 28, 2
9, as shown in FIGS. 2, 4, 5, and 6, there is a space between adjacent cable chambers 15, 15, and adjacent cable chambers 16. The first and second branch busbar chambers 30 and 31 are approximately T-shaped.
Almost T-shaped first and second branch busbars 3 housed in
The upper ends of 2 and 33 are connected respectively, and the first
The lower end of the branch busbar 32 is appropriately connected to the upper first terminal provided through the partition 14, and the lower end of the second branch busbar 33 is connected to the lower second terminal similarly provided through the partition 14. Connected appropriately.

Note that pressure relief devices 34 and 35 are installed on the ceilings of the first and second busbar chambers 17 and 18 corresponding to the first and second branch busbar chambers 30 and 31, respectively. A door 36 is installed in the space between the breaker chambers 15 and 15. Also,
A load cable 37 is introduced into the cable room 16, and this load cable 37
The second terminal on the upper stage and the first terminal on the lower stage are connected through an inter-terminal crossover conductor 38 and an instrument current transformer 39. Furthermore, in the embodiment described above, the grounded casing 1
In the above description, the case where the insulation chamber 15 and the like are defined through the various partition walls 13 and 14 has been described, but the present invention is not limited to this. It is also possible to add a formed plate, a disconnection board, etc.

As described above, the present invention allows the drawer type and disconnector to be separated into upper and lower parts.
A pair of drawer-shaped and disconnecting chambers with an upper rail and a lower rail provided on both sides to be stored in one of the tiers are spaced apart in a direction perpendicular to the direction of movement of the drawer and disconnector (in the direction of rows of panels). At the same time, a cable room is provided at the back of each breaker room, and a first power supply bus and a second power supply bus of different systems are stored in the upper part of the cable room in the direction of arrangement of the breaker room. The extending first busbar chamber and second busbar chamber are arranged side by side in order from the side of the breaker chamber, and the first busbar chamber extends over the space between the adjacent breaker chambers and the adjacent cable room.
A T-shaped first branch bus bar is provided to accommodate the T-shaped first branch bus bar that connects the power supply bus bar and the drawer type and disconnector stored in the upper stage of each disconnection chamber, and a second power supply bus bar is provided. A T-shaped second branch busbar is provided to accommodate a T-shaped second branch busbar that connects the drawer type and the disconnector stored in the lower part of each of the cabinets and the disconnector chamber. Pressure relief devices are installed in the upper part of the power supply chamber and the first and second busbar chambers, so that the fitting accuracy is always good when switching connections between drawer type disconnectors and terminals such as power busbars. In addition, the abnormal pressure in each chamber in the panel caused by a short circuit accident can be easily released.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a conventional double-bus closed switchboard, Fig. 2 is a partially cutaway front view of the double-bus closed switchboard according to the present invention, which has a side-by-side configuration; 4 is a sectional view taken along the - line and - line in FIG. 2, respectively, FIGS. 5 and 6 are a side view and a plan view of the main part, respectively, and FIG. 7 is a perspective view of another embodiment of the main part. . 15...Shiya disconnection room, 16...Cable room, 1
7...First busbar room, 18...Second busbar room, 19...
...Drawer type and disconnector, 20a...Top rail, 20
b... Lower rail, 26... Pressure relief device, 28...
First power bus, 29...Second power bus, 30...
First branch bus room, 31...Second branch bus room, 32
...First branch bus, 33...Second branch bus, 3
4,35...pressure relief device.

Claims (1)

[Scope of utility model registration request] An upper rail 20a and a lower rail 20 are used to store drawers and disconnectors 19 in either the upper or lower two stages.
A pair of shield chambers 15 with b provided on both sides, respectively.
are arranged spaced apart in a direction perpendicular to the moving direction of the drawer shapes and the disconnector 19, and each side and the disconnector chamber 15
A cable room 16 is provided at the back of the cable room 16, and a first power supply bus 28 and a second power supply bus 29 of different systems are housed in the upper part of the cable room 16, and a first power supply bus 28 and a second power supply bus 29 extending in the arrangement direction of the disconnection chambers 15 are provided. The first busbar chamber 17 and the second busbar chamber 18 are arranged side by side in order from the side of the breaker chamber 15, and the first busbar chamber 17 and the second busbar chamber 18 are arranged side by side in order from the side of the breaker chamber 15, and the first busbar chamber 17 and the second busbar chamber 18 are arranged side by side in order from the side of the breaker chamber 15. A T-shaped first branch busbar chamber 30 is provided to house a T-shaped first branch busbar 32 that connects the first power supply busbar 28 and the drawer-shaped disconnector 19 stored in the upper stage of each side disconnector chamber 15.
In order to accommodate the T-shaped second branch busbar 33 that connects the second power supply busbar 33 and the drawer type and disconnector 19 stored in the lower part of each shelf and disconnector chamber 15, a T-shaped second branch busbar 33 is provided. A branch busbar chamber 31 is provided, and each of the above-mentioned shear disconnection chambers 15 and the first and second busbar chambers 30, 31
A double bus type closed switchboard comprising pressure relief devices 26, 34, and 35 respectively installed on the upper part of the switchboard.