JP2661429B2 - Distribution panel busbar arrangement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus arrangement of a switchboard.

[0002]

FIG. 6 is a sectional side view of a conventional multi-stage switchboard, FIG. 7 is a sectional view taken along line CC of FIG. 6, and FIG. 8 is a sectional view taken along line DD of FIG. The switchboard of this embodiment has a three-stage structure, and three vertical buses 1 corresponding to the breaker units of each stage.
Are held by insulators 2 on the side surfaces of the switchboard. A branch bus 3 extends from each vertical bus 1 to the middle and lower units, and each branch bus 3 is connected to the power supply terminal 1 of the circuit breaker 4 of each unit.
4a is connected to the power supply side insulator tube 5 via a terminal conductor. Here, the power supply side insulator tube 5 is provided to penetrate a wall surface 20 that separates a circuit breaker room 6 that houses the circuit breaker 4 and a vertical bus room 7 that houses the vertical bus 1. The load side terminal 14b of the circuit breaker 4 is connected to the load cable 9 via the terminal conductor of the load side insulator tube 8. The load cable 9 extends to a cable room 11 adjacent to the vertical bus room 7, and the vertical bus room 7 and the cable room 11 are separated from each other by the partition cover 1.
It is divided by two. A horizontal bus 13 is provided at a position facing the upper unit, and each horizontal bus 13
Are connected to the respective vertical buses 1 and to the terminal conductors of the upper power supply side insulator tube 5.

Japanese Patent Application Laid-Open No. 63-114510 discloses a multistage closed switchboard in which a vertical bus is accommodated in a vertical bus chamber on the back of the unit, and a load-side conductor of the circuit breaker is connected via an insulator tube penetrating the vertical bus chamber. A structure configured to be drawn out to a cable room is disclosed.

[0004]

In the conventional switchboard bus arrangement shown in FIGS. 6 to 8, the vertical buses are arranged in a direction perpendicular to the arrangement direction of the power supply side insulators in each stage. The arrangement of the branch buses between the vertical buses and the terminal conductors of the respective power supply side insulators is complicated, and the shapes of the branch buses are individually different. Therefore, the shape of the partition cover that partitions the cable room and each vertical bus room in each compartment is complicated, so that maintenance of the vertical bus is not easy, and there is a problem that a space for drawing in the load cable cannot be widened. . In addition, as disclosed in the above publication, a vertical bus is
If the load-side conductor is housed in the provided vertical bus room and the load-side conductor is drawn through the vertical bus room to the cable room, it is possible that the above problem can be solved. There is no specific configuration for this.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to facilitate maintenance of a vertical bus in a switchboard and to secure a wide space for drawing in a load cable. It is.

[0006]

According to the bus arrangement of the switchboard according to the present invention, a vertical bus chamber is provided on the back of the unit, and the branch buses are held by the respective vertical buses and arranged on the sides of the respective vertical buses. A structure composed of a combination of the vertical buses holding the branch buses is housed in the vertical bus room, and the load-side conductor is shielded by a load-side porcelain tube arranged on the side of each vertical bus to penetrate the vertical bus room. The load-side insulator has a configuration in which two insulator bodies having the same configuration as that of the power-source-side insulator are connected to each other with a connecting insulator interposed therebetween .

[0007]

In the present invention, a vertical bus chamber is provided at the back of the unit, branch buses are arranged beside each vertical bus, and a structure composed of a combination of the vertical buses holding these branch buses is formed by the vertical bus. It is housed in a room, and the load-side porcelain penetrates through the sides of each vertical bus, so that the vertical bus room can be partitioned in a simple shape on the back of the unit, which facilitates maintenance of the vertical bus. Also, it is easy to secure a space for drawing in the load cable. In addition, the load-side insulator is connected to the insulator body of the power-source insulator.
Two porcelain bodies of the same configuration are connected to each other with the connecting porcelain
It is connected and can ensure insulation,
Regardless of which symmetrical connection insulator pipe is placed in the center,
The structure should be the same and wrapped with the insulator body on both sides
This facilitates assembly and improves workability.
Wear. The insulator body of the load-side insulator is the same as the power-source insulator.
It is a member that can improve workability by sharing
it can.

[0008]

1 is a sectional side view showing an embodiment of a bus arrangement of a switchboard according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. FIG. 5 is an enlarged cross-sectional view showing the mounting structure of the power source side insulator tube in the embodiment, and FIG. 5 is an enlarged cross-sectional view showing the mounting structure of the upper and interrupted load side insulator tube in the embodiment. The switchboard of this embodiment has a three-stage configuration in which circuit breaker units are housed in three stages, and three vertical busbars 1 each having a connection structure of two busbar portions 1a and 1b are arranged on the rear surface of the unit. And these vertical buses 1
Are held by the insulators 2 on the wall surfaces 20 that partition the circuit breaker room 6. A branch bus 3 is provided for each of the units in the middle and lower stages while being held by each vertical bus 1. The branch bus 3 is connected to the power supply terminal 14a of each unit (circuit breaker 4) by the terminal of the power supply side insulator tube 5. They are connected via conductors 15a. Here, the power supply side insulator tube 5 of each stage is provided with a circuit breaker room 6 accommodating the circuit breaker 4 and a vertical bus room 7 accommodating the vertical bus 1 and a cable room at a position offset in the same direction with respect to each vertical bus 1. It is provided so as to penetrate a wall surface 20 partitioning from the wall 11. Each of the branch buses 3 connected to the terminal conductor 15a of the power source-side insulator 5 has the same bent shape, and the amount of protrusion from between the vertical buses 1 on the side of each of the vertical buses 1 is as small as possible. And a combination of three vertical buses 1 including the respective branch buses 3 constitutes a compact structure.

The vertical bus chamber 7 is separated from the cable chamber 11 by a partition cover 12 which is formed on the back of the circuit breaker chamber 6 and is mainly composed of a flat plate parallel to the wall surface 20 for partitioning the circuit breaker chamber 6. Accommodates the compact structure described above. The load-side terminals 14b of the upper and middle circuit breakers 4 are connected to the two insulator body 8a,
8b are shielded from the vertical bus chambers 7 by passing through the load-side insulators 8 having a structure in which the load buses 8b are connected to each other with the connecting insulators 10 interposed therebetween. It is connected to the load cable 9 in the cable chamber 11 via the terminal conductor 15b of the side insulator tube 8.

At the position facing the upper unit, horizontal buses 13 are provided for the respective vertical buses 1. These horizontal buses 13 are connected to the respective vertical buses 1 and the respective power supply side insulators 5 of the upper unit. Terminal conductor 15
a. A load-side insulator 8 ′ through which the load-side conductor of the lower unit passes is connected to the load cable 9 at a position away from the vertical bus chamber 7.

As shown in FIG. 4, the power supply side insulator 5 has a terminal conductor 15a inserted into a substantially cylindrical insulator body. A terminal holding bracket 16 is fixed to the terminal conductor 15a,
The terminal holding member 16 is fixed to the insulator main body of the power source side insulator tube 5 by a terminal holding member attaching screw 17. The power supply side insulator tube 5 is attached to the wall surface 20 that partitions the circuit breaker room 6 by an insulator tube attachment screw 18.

The structure of the upper and middle load side insulators 8 is as shown in FIG. 5, and the two insulator main bodies 8a and 8b sandwiching the connecting insulator 10 are the same as the insulator main body of the power supply side insulator 5. And the terminal conductor 15b is connected to the terminal holder 1
The left and right insulator tube main body 8 is formed by the
a, 8b. The left and right porcelain main bodies 8a, 8 are provided with respect to a wall surface 20 that partitions the circuit breaker room 6 and a partition cover 12 that partitions the vertical bus room 7 from the cable room 11.
b are respectively attached by porcelain tube attachment screws 18. The procedure for assembling the load-side insulator 8 is as follows.
That is, first, the terminal conductor 15b is attached to the insulator tube main body 8a on the wall surface 20 side by the terminal holding bracket 16 and the terminal holding bracket attaching screw 17, and then the insulator tube main body 8a is attached to the wall surface 20 by the insulator tube attaching screw 18. In addition, the terminal holding bracket 16 for the insulator body 8b on the partition cover 12 side is fixed to the terminal conductor 15b, and the connecting insulator 10 is passed through the terminal conductor 15b so that the insulator body 8a on the wall surface 20 side.
And then the insulator body 8 on the partition cover 12 side
b, the porcelain main body 8a is attached to the partition cover 12 with the porcelain attachment screws 18. Then, the terminal conductor 15b is fixed to the insulator tube main body 8b on the partition cover 12 side by the terminal holding bracket 16 and the terminal holding bracket mounting screw 17. On the other hand, the lower-stage load-side insulator 8 has the same structure as the power-source-side insulator 5 shown in FIG.

In the above embodiment, three circuit breaker units are used.
Although the present invention has a stacked structure, the present invention can be applied to a switchboard having a two-stage structure and also to another switchboard having a multi-stage structure. Further, the present invention can be applied to a case where the vertical bus capacity and the breaker capacity are further larger, and the same effects are obtained.

The porcelain structure in which the two porcelain bodies are connected to each other with the connecting porcelain sandwiched therebetween is applicable not only to the load-side porcelain, but also to a power supply porcelain.

[0015]

As described above, according to the present invention, a vertical bus chamber is provided on the back of the unit, branch buses are held on the respective vertical buses, and are arranged beside the respective vertical buses, and these branch buses are held. The structure composed of the combinations of the vertical buses described above is housed in the vertical bus room, and the load-side conductor of each unit is shielded by the load-side insulator to penetrate the vertical bus room. The shape of the member to be formed can be simplified and the number of points can be reduced, and the maintenance of the vertical bus is facilitated. Further, it is possible to secure a sufficient space for drawing in and connecting the load cable to the back side of the vertical bus room, and to reduce the depth of the switchboard. Also, the assembly of the load side insulator tube is made easy.
In addition to improving workability, the load-side insulator
Workability by sharing the side tube main body and the power supply side insulator tube
Can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing one embodiment of a bus arrangement of a switchboard according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an enlarged sectional view showing a mounting structure of a power source side insulator tube in one embodiment of a bus arrangement of a switchboard according to the present invention;

FIG. 5 is an enlarged sectional view showing the mounting structure of the upper and interrupted load-side porcelain tubes in one embodiment of the bus arrangement of the switchboard according to the present invention;

FIG. 6 is a cross-sectional side view of a conventional multi-stage switchboard.

FIG. 7 is a sectional view taken along line CC of FIG. 6;

8 is a sectional view taken along line DD of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical bus 3 Branch bus 4 Circuit breaker 5 Power supply side insulator 6 Circuit breaker room (unit room) 7 Vertical bus room 8 Load side insulator 8a, 8b Insulator body 9 Load cable 10 Connection insulator 11 Cable room 12 Partition cover 13 Horizontal bus 14a Power side conductor 14b Load side conductor

Claims (1)

(57) [Claims] 1. A switchboard for housing the units constituting the unit circuit breaker or the like in a plurality of stages, the vertical busbar chamber provided in the rear of the unit, the power supply side to the power supply side conductor of the units of each stage
The branch buses connected via the terminal conductors of the insulator tube are held on the respective vertical buses, arranged on the sides of the respective vertical buses, and a structure comprising a combination of the respective vertical buses holding the branch buses is formed in the vertical bus chamber. while housed in the load-side conductor of each unit were placed on the side of each vertical bus, before
Two insulator bodies with the same configuration as the insulator body on the power supply side
A bus arrangement of a switchboard, wherein the vertical bus chamber is penetrated by being shielded by a load-side insulator connected to each other with a connecting insulator interposed therebetween .