JPH0683521B2 - Multi-stage closed type switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a multi-stage closed type switchboard.

[Prior Art] A closed type switchboard for accommodating circuit breakers in a multi-tiered manner is basically shown in FIG. 7 as disclosed in Japanese Patent Publication No. 61-33327. . As shown in the figure, the closed type switchboard is formed on the front side of the housing 1 in multiple stages and has a circuit breaker chamber 2a for accommodating the circuit breaker 2 and a meter,
A front door 3 with a relay is installed, and this circuit breaker chamber 2a
An external cable chamber 4 is provided on the rear side of the. In the external cable chamber 4, a horizontal main bus conductor 5, a vertical bus conductor 6 connected to the horizontal main bus conductor 5, cable connecting conductors 8 to 11 branched from the load connecting terminal 7 of each circuit breaker 2, and the conductors 8 to 11 are provided. Connected external cables 12 to 15 are provided.

[Problems to be solved by the invention]

The above-mentioned conventional technique has the following problems, which will be described with reference to FIG. Since the external cables 12 to 15 are pulled out in the same direction for all four lines, the housing 1
During the work of connecting the external cable 15 to the cable connecting conductor 11 of the line arranged on the central part side of the line, the external cable 13 installed on the upper side of the back surface of the housing 1 becomes an obstacle, and the cable connecting work cannot be performed. Further, as the load current increases, the cable size also increases, and it becomes impossible to bend the cable abruptly, which causes problems in workability and maintainability of the cable connection. In addition, the upper and middle unit cable connection conductors 8 and 10 are arranged in two circuits on the right side on the back side of the housing 1 in the front-rear direction and in the upper and lower stages, so that the cable connection between the lower and middle units is made. Since the conductors 9 and 11 are arranged deeper than the central portion of the housing 1, that is, the back surface of the housing 1, both workability and maintainability are difficult.

The present invention has been made in view of the above points, and an object of the present invention is to provide a multi-stage stacking closed type switchboard which enables easy connection work and maintenance inspection of external cables.

[Means for solving problems]

The above object is achieved by arranging the cable connecting conductors of the circuit breakers in each stage on the left and right side surfaces of the casing in order from the upper stage side, and arranging the casings so that the depth and width positions thereof are displaced from each other. It

[Action]

The conductors for connecting the cables of the circuit breakers at the respective stages are respectively sorted from the upper stage side to the left and right side surfaces of the casing, and the depth and widthwise positions of the casing are displaced from each other. Therefore, the cable connecting conductors are arranged in a line, and the external cable connecting work can be easily performed without being disturbed by the external cables of other lines.

〔Example〕

Hereinafter, the present invention will be described based on the illustrated embodiments. 1 to 4 show an embodiment of the present invention.
Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. In this embodiment, the conductors 8 to 11 for connecting the cables of the circuit breaker 2 at each stage are arranged in order from the upper stage side to the left and right side surfaces of the casing 1, and the positions of the casing 1 in the depth and width directions are shifted. did. By doing this, the external cable 12-
It is possible to obtain a multi-stage stacking closed type switchboard which facilitates connection work of the external cables 12 to 15 and facilitates connection work of 15.

That is, among the cable connecting conductors 8 to 11 branched from the load connection terminal 7 of the circuit breaker 2, the cable connecting conductors 8 and 9 from the upper circuit breaker 2 are, as shown in FIG.
The external cables 12 and 13 are connected to the left and right side surfaces of the housing 1 and on the rearmost surface side with the position in the depth direction being shifted. Then, the cable connecting conductors 10 and 11 from the circuit breaker 2 of the lower two lines are similarly pulled out to the inside of the housing 1 from the cable connecting conductors 8 and 9 of the upper line. In this case, since the cable connecting conductor 11 at the bottom is not close to the floor surface 16 of the housing 1 and the external cable 15 cannot be processed, the cable connecting conductor 11 is once raised to the upper part of the housing 1. Pulled out from the side. By doing so, the four-line external cables 12 to 15 are aligned in the depth direction with both side surfaces of the housing 1, and are not disturbed by the external cables of other lines, thus improving workability and maintainability. be able to. In FIGS. 2 and 3, reference numeral 17 is a control unit unit that houses a measuring instrument, an operation switch and a set of control devices, and 18 and 19 are side surfaces of a horizontal main bus conductor 5 and a casing 1 arranged in two upper and lower stages. It is a metal barrier for partitioning the vertical busbar conductors 6 arranged in the.

As described above, according to the present embodiment, the external cable connection work and maintenance / inspection of multiple lines in multiple stages can be efficiently performed without being disturbed by cables of other lines.

5 and 6 show another embodiment of the present invention. This embodiment is a case of stacking four or more stages. External cables can be arranged for four lines on each side of the housing 1 in the depth direction.
The top and middle lines are arranged in parallel in the width direction of the housing 1 so that work can be easily performed even when multi-layered with four or more lines. That is, the uppermost cable connecting conductor 20 was arranged on the side surface side of the housing 1, and the middle cable connecting conductor 10 was arranged inside the housing 1. By doing so, the uppermost cable connecting conductor 20 is provided in the vicinity of the connection portion of the middle-level cable connecting conductor 10 with the external cable 14.
Although the external cable 21 connected to is passing through, it has the same electric potential, and it is zero potential after the terminal treatment of the external cable 21, so the external cable in the middle stage is irrelevant regardless of the external cable 21 in the top stage. 14 connection work can be done. Conductor 22 for cable connection on the uppermost stage side and external cable connected to this
The same applies to the case of 23, and the uppermost cable connection conductor 20
And the position in the width direction may be shifted.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to obtain a multi-stage stacking closed type switchboard which facilitates connection work and maintenance inspection of the external cable and facilitates connection work and maintenance inspection of the external cable.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a multi-stage closed type distribution board of the present invention, FIG. 2 is a plan view of the same embodiment, and FIG. 3 is an arrangement of conductors for cable connection in the uppermost stage of the same embodiment. FIG. 4 is a plan view showing the arrangement of the cable connecting conductors in the lowermost stage of one embodiment, and FIG. 5 is a side view of another embodiment of the multistage stacking closed type switchboard of the present invention. FIG. 6 is a plan view showing the arrangement of the conductors for connecting cables at the uppermost stage and the middle stage of another embodiment, and FIG. 7 is a side view of a conventional multi-stage closed type switchboard. 1 ... Housing, 2 ... Circuit breaker, 2a ... Circuit breaker room, 4 ... External cable room, 8-11 ... Cable connecting conductor, 12-15
…… External cable, 20 …… Cable connecting conductor, 21 ……
External cable, 22 …… Cable connecting conductor, 23 …… External cable.

Claims (1)

[Claims] 1. An external cable chamber, comprising: a circuit breaker chamber, which is formed in multiple stages on a front surface side in a housing and accommodates a circuit breaker; and an external cable chamber provided behind the circuit breaker chamber. In the multi-stage stacking closed type switchboard in which the cable connecting conductor of the circuit breaker and the external cable connected to the conductor are arranged, the cable connecting conductors of the circuit breakers of the respective stages are sequentially arranged from the upper stage side. A multi-stage closed type switchboard, which is divided into left and right side surfaces of the housing, and is arranged with the depth and widthwise positions of the housing shifted.