JP3081949B2 - Multi-stage draw-out closed switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage closed switchboard, and more particularly to a multi-stage drawer-type closed switchboard in which drawer-type unit switchgears are arranged and configured in multiple stages.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a conventional multi-stage draw-out closed switchboard of this type.

[0003] Fig. 4 is a side view of a three-stage multi-stage drawer-type closed switchboard. The multi-stage switchgear unit is constituted by each unit unit, and components other than the storage box are assembled and constituted from substantially the same components.

The box body of the closed switchboard includes a front door 1 and an outer frame housing 2.
The unit units are arranged in a multi-tiered structure inside the box of the closed switchboard, and each unit unit includes a movable carriage 3 and a fixed frame 4 supporting the movable carriage. High-voltage appliances (power fuse 5, high-voltage electromagnetic contactor 6, current transformer 7, operating transformer 8) are assembled on the movable frame 3 at appropriate intervals on the same frame, and can be moved in and out by moving the movable frame 3 back and forth. And a plurality of load-side main circuit disconnecting portions 9a (three for a three-phase circuit) and a plurality of load-side main circuit disconnecting portions 9b (three for a three-phase circuit). Unit units are provided at the upper and lower ends of a fixed frame 4 that supports and guides the movable carriage 3 in the forward and backward directions. Usually, the same unit units are stacked and fixed to the outer frame housing 2 for use.

A bus room 10a for supplying power is composed of a bus cover 10, three-phase bus bars 11a, 11b and 11c, and a wiring 13 extending from the three-phase bus covers 11a, 11b and 11c to a lower unit unit power supply terminal 12 at the bottom. (Because it is inside the switchboard, the wiring usually uses 3kV or 6kV class insulated wire, but the insulation coating of the wire is a wire laid at a fixed insulation interval from the ground, and the insulation coating is not grounded, so the insulation is completely insulated. Are not provided.). The wiring to the load circuit for each unit is the load cable 14
To the load side.

Further, the high voltage wiring processing chamber 15 is
2. It is provided as a space for accommodating the crossover wiring 13 of the power supply, the load cable 14, and the like, and as a construction space for a worker to wire-mount the load cable 14.

[0007]

In the above-mentioned conventional multi-stage draw-out type closed switchboard, the electric wire of the crossover wiring 13 bent three-dimensionally in the space of the high voltage wiring processing chamber 15 is connected to the power supply terminal 12. In this case, the space of the high-voltage wiring processing chamber 15 becomes complicated with high-voltage wiring, for example, a portion where the load cable 14 intersects with the power supply crossover wiring 13 at a right angle. There is a problem that it is not preferable from the viewpoint of safety because it is projected and exposed in the space.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a multistage draw-out type switchboard with a simplified structure and improved safety.

[0009]

According to the present invention, there is provided a multi-stage draw-out type closed switchboard having a plurality of doors provided at a front portion of an outer frame housing, and a load cable having a plurality of doors partitioned by a fixed frame at a rear portion inside the outer frame housing. In the closed box where the wiring processing space was formed,
In a multi-stage drawer-type closed distribution panel in which drawer-type unit units that are horizontally movable in the front and rear of the outer frame housing are stored in a multi-stage stack, a detachable power supply-side energizing means is provided at an upper rear portion of the unit unit. Removable load-side energizing means are respectively located at the rear lower part of the unit unit, and are disposed on the fixed frame so that the power-supply energizing means is located as a whole on the front side of the outer casing with respect to the load-side energizing means. And a part of the unit unit is in front of the power supply means.
The power supply terminals included in the power supply side energizing means are arranged in a space between the power supply side energizing means, and a wire member for commonly connecting the unit units is fastened by a fixing means, and the common connection electric wire member is fixed. The fixed frame is located before the load cable wiring processing space, the space between the common connection wire member and the load cable wiring processing space is isolated, and the horizontal frame of the unit unit is guided. A frame is formed.

That is, according to the present invention, the power supply crossover wiring 13 conventionally disposed in the space of the high-voltage wiring processing chamber 15 is disposed in the area Q (shown in FIG. 3) in which the high-voltage appliances are disposed. The fixed frame frame 17 is configured to be separated from the space of the high-voltage wiring processing chamber 15 by a fixed frame frame 17 so that the fixed frame frame 17 becomes a partition wall.

[0011]

In the above-configured multi-stage draw-out type closed switchboard, the crossover wiring 13 is located in the area Q where the high-voltage equipment is arranged, and the crossover wiring 13 and the high-voltage wiring processing chamber 15 are fixed to the fixed frame frame 17.
There is no danger of accidentally touching the power supply wiring part because of the isolation.

The high-voltage wiring processing chamber 15 is provided with
Can be eliminated, a large space can be taken, and the wiring work of the load cable 14 becomes easy.

[0013]

FIG. 1, FIG. 2 and FIG. 3 show an embodiment of the present invention.
This will be described in more detail. Although the reference numerals shown in FIG. 4 described in the section of the prior art are also used in the embodiment of the present invention, members denoted by the same reference numerals have the same functions and effects. FIG. 1 shows a configuration of an embodiment of a multi-stage draw-out type closed switchboard according to the present invention. The plurality of high-voltage power supply crossover wirings 16 in FIG. 1 are configured to be wired on the left side (front door 1 side) of the fixed frame frame 17 (usually configured as a bent frame body made of metal). A wiring through hole 18 (shown in FIG. 3) is provided at the bottom of the lower end of the wire. The upper end is formed by bending the fixed frame 17 so as not to interfere with the wiring, and has an opening 19. The wiring to the power supply terminals 12 of the unit unit passes through the opening 19 and is connected to each power supply terminal 12 (see FIG. 3). The wiring is almost directly above each power supply terminal 12 so as to be almost vertical when viewed from the side.
As shown in FIG. 2, the wiring is configured so that it can be wired in a straight line directly below, and as shown in FIG. 2, each wiring is substantially two-dimensional so as to avoid the load-side main circuit disconnecting part 9 b. The wiring is connected to the power supply terminal 12 by bending the wiring. With such a configuration, the high-voltage power supply crossover wiring 16 having the same wiring length can be used.

Further, since the high-voltage power supply wiring 16 is concentrated in the area Q where the high-voltage equipment is arranged, the high-voltage power supply wiring does not touch the high-voltage power supply wiring.

The power supply side main circuit disconnecting portion 9a as the power supply side energizing means is connected to the load side main circuit disconnecting portion 9 as the load side energizing means.
1 and 3, that is, on the front door 1 side, so that the high-voltage wiring processing chamber 15
Since the power supply side terminals 12 protruding into the space are not disposed in a state where they are exposed, the high-voltage wiring processing chamber 15 can be widely used, and there is no complicated wiring.

The connecting portion of the high-voltage power supply crossover wiring 16 to the power supply terminal 12 is provided with an opening window 20 at the upper end of the fixed frame 17 so that it can be connected from the high-voltage wiring processing chamber 15 side, and a removable means is provided. The power supply terminal 12 is provided so as to cover the power supply terminal 12 with the insulating lid 21.

According to this embodiment as described above,
By bending and wiring the high-voltage power supply crossover wiring 16 in the arrangement area Q of the high-voltage appliance, it is possible to prevent the wiring under applied voltage from touching.

Further, according to this embodiment, since the wiring is bent in a substantially two-dimensional shape bending operation, the wiring operation is facilitated.

Further, according to the present embodiment, since the wiring bent shape is constant, the high-voltage power supply wiring 16 having the same wiring length can be used for each unit, and wiring work efficiency is improved.

Further, according to this embodiment, the high-voltage wiring processing chamber 15
Since the exposed power supply side end protruding from the power supply side is eliminated, the safety is enhanced, the high-voltage wiring processing chamber 15 can be widely used, and the workability of attaching and detaching the load cable 14 is improved.

Further, according to the present embodiment, it is possible to realize a multi-stage draw-out type closed distribution board which improves the reliability of wiring work without complicated wiring as in the conventional example.

[0022]

According to the present invention as described above,
In the past, the power supply crossover wiring, which was previously arranged in the space of the high-voltage wiring processing chamber, is now arranged in the area where the high-voltage equipment is located, and is separated from the space of the high-voltage wiring processing chamber by a fixed frame. However, since the fixed frame is configured as a partition wall, it is possible to realize a multi-stage draw-out type closed distribution panel that simplifies the high-voltage wiring structure of each unit and improves safety.

[0023]

[Brief description of the drawings]

FIG. 1 is a side view showing the internal mounting state of a multi-stage drawer-type closed switchboard according to the present invention.

FIG. 2 is a configuration diagram showing a mounting state of the back surface of the multi-stage drawer-type closed switchboard shown in FIG. 1;

FIG. 3 is a cross-sectional view showing a structure of a main part near a unit unit of the multistage draw-out closed switchboard shown in FIG.

FIG. 4 is a side view showing the internal mounting state of a conventional multistage draw-out type closed switchboard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front door 2 Outer frame housing 3 Movable carriage 4 Fixed frame 5 Power fuse 6 High voltage electromagnetic contactor 7 Current transformer 8 Operation transformer 9a Power supply side main circuit disconnection part 9b Load side main circuit disconnection part 12 Power supply terminal 13 Wiring 14 Load cable 15 High-voltage wiring processing room 16 High-voltage power supply wiring 17 Fixed frame frame Q High-voltage equipment placement area

Continuation of the front page (56) References JP-A-59-76105 (JP, A) JP-A-49-43137 (JP, A) JP-A-63-178705 (JP, A) , U) Actually open 1979-144229 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 11/02 H02B 11/12-12/127 H02B 1/30-1/36 H02B 1/20-1/21

Claims (2)

(57) [Claims] 1. A plurality of doors are provided at a front portion of an outer frame housing,
A drawer-type unit that can be moved horizontally in front of and behind the outer frame housing is housed in a multi-stage stack in a closed box in which a load cable wiring processing space is formed by partitioning the rear frame inside the outer frame housing with a fixed frame frame. A detachable power supply-side energizing means is located at the rear upper part of the unit unit, and a detachable load-side energizing means is located at the rear lower part of the unit unit. Energizing means
While disposed on the fixed frame frame so as to be located on the front side of the outer casing from the overall load side conducting means, said
A part of the unit is connected to the power supply means and the load side
And a power supply terminal included in each of the power supply side energizing means and an electric wire member for commonly connecting each unit unit are fastened by fixing means, and the common connection electric wire member is provided with the load. The fixed frame is formed so as to be located closer to the cable wiring processing space, to isolate the common connection wire member and the load cable wiring processing space, and to guide the horizontal pull-out of the unit unit. Multi-stage draw-out type closed switchboard characterized by doing. 2. The fixed frame according to claim 1, further comprising an opening window for checking a wiring connection of a power supply terminal of a power supply side power supply means, and a detachable lid provided on the opening window. Multi-stage drawer-type closed switchboard.