JP3279711B2 - 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 closed switchboard for housing drawer-type equipment in multiple stages.

[0002]

2. Description of the Related Art In general, a closed switchboard is divided into unit circuits of a system, and auxiliary equipment such as a circuit breaker, a transformer for an instrument, a surge arrester, and a current transformer are housed in a grounded metal box. . Of these, the other equipment, excluding the current transformer, is of draw-out type for ease of maintenance and inspection, and is stacked in multiple stages with increased mounting density to reduce the installation space for closed switchboards.

[0003] The number of stacks generally varies depending on the outer shape and weight of the circuit breaker, that is, the breaking current and the rated current. For example, a small-capacity feeder panel has a three-stage circuit breaker and a bus bar arranged at the top, and a large-capacity feeder panel has a two-stage circuit breaker and a central bus line. The configuration of the power receiving panel connected to such a feeder panel must be adapted to the system since the bus position is different between the small-capacity and large-capacity feeder panels, so that the arrangement of the devices may need to be changed.

In this case, a drawer provided with a circuit breaker, a transformer for an instrument and a lightning arrester is provided with a shelf plate for supporting the drawer individually according to the size of each drawer, and in this state, the arrangement of each equipment is changed. Changing.

[0005]

However, the provision of individual shelves in each drawer not only requires a great deal of labor but also is uneconomical. In addition, incorporating such a drawer in a narrow place has been a factor of reducing workability. SUMMARY OF THE INVENTION An object of the present invention is to provide a closed switchboard which does not require a shelf provided separately for a drawer device and can easily change the arrangement of devices.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a draw-out apparatus in which two kinds of auxiliary equipment are superimposed to form a draw-out apparatus, and a draw-out apparatus for draw-out and a breaker. The gist is that the drawer-type devices are housed in multiple levels, with the height of the device and the position of the main circuit terminals being substantially the same.

[0007]

[Function] In such a configuration, the height and the main circuit terminal position of the draw-out device of the overlapped drawer and the breaker are substantially the same, so that the draw-out type device of the overlapped drawer and the breaker are interchangeable. Properties, and sharing of the shelf can be achieved.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view schematically showing a closed switchboard of the present invention when a bus bar is located at an upper part thereof, and FIG. 2 is a side sectional view schematically showing a closed switchboard of the present invention having a bus bar at the center thereof.

In these figures, reference numeral 1 denotes a circuit breaker, which is configured as a drawer type device arranged in a drawer device 2. Reference numeral 3 denotes an instrument transformer, and reference numeral 4 denotes an arrester. The instrument transformer 3 is arranged at the upper stage of the drawer 5 and the arrester 4 is arranged at the lower stage to constitute a draw-out type device. In this state, the drawer 2 and the drawer 5 are housed in a grounded metal box 6. At this time, the drawer 2 and the drawer 5 are placed on the same shelf 7 provided in the box 1, and the upper main circuit terminal of the drawer 2 on the circuit breaker 1 side is connected to the bus 8. ing.

FIGS. 3A and 3B show the drawer 5, in which FIG. 3A is a front view and FIG. 3B is a right side view. As shown in the drawing, the drawer 5 is connected to a drawer 5A for disposing the instrument transformer 3 and a drawer 5B for disposing the lightning arrester 4 by a connecting plate 9 as shown in FIG. , Nuts and the like. Further, the height of each of the drawers 5A and 5B is set to be about の of the height of the drawer 2, and the vertical position of the main circuit terminal 10 is substantially the same as the terminal position of the drawer 2. That is, a in FIG. 2 and c in FIG. 3B, and b in FIG.
(B) d is made almost the same.

According to this embodiment, the drawer 2 of the circuit breaker 1
And the drawer 5 of the auxiliary equipment such as the instrument transformer 3 and the lightning arrester 4 can be interchangeable because the height and the main circuit terminal position are almost the same. Therefore, even if a shelf board is not provided in each drawer, if a shelf board is provided in the box body 6 without sticking to the position of the bus bar 8, any of the drawers can be arranged, and workability can be improved. Improvement can be achieved.

On the other hand, the drawer 5 may be as shown in FIG. That is, FIG. 5 (a) is a front view thereof, and FIG. 5 (b) is a right side view thereof. An auxiliary device base 11 is provided between the main circuit terminals 12 of the drawer 5, and the base and the base are connected as shown in FIG.
Are connected by a connecting plate 9 and fixed by bolts and nuts (not shown). With this auxiliary equipment base 11 as a boundary,
The instrument transformer 3 or the lightning arrester 4 is arranged in the upper or lower stage. The height of the drawer 5 and the position of the main circuit terminal 12 are the same as in the above-described embodiment. Even in such a case, the same effect as in the above-described embodiment can be obtained.

[0013]

As described above, according to the present invention, two kinds of auxiliary equipment drawer-type equipment are superimposed to form a polymerization drawer-type equipment, and the height of the polymerization drawer-type equipment and the drawer-type equipment of the circuit breaker are heightened. Since the drawer-type devices are housed in multiple stages with the main circuit terminal positions being substantially the same, the need for a separately provided shelf board in the drawer device is eliminated, and a closed switchboard that facilitates rearrangement of devices can be obtained. Can be.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view schematically showing a closed switchboard according to the present invention when a bus bar is located at an upper part.

FIG. 2 is a side cross-sectional view schematically showing the closed switchboard of the present invention when a bus is located at the center.

FIG. 3 is a view showing one embodiment of the drawing device 5 of FIG. 1;

FIG. 4 is a view for explaining the assembly of the drawer 5 of FIG. 3;

FIG. 5 is a view showing another embodiment of the drawing device 5 of FIG. 1;

FIG. 6 is a diagram for explaining the assembly of the drawer 5 of FIG. 5;

[Explanation of symbols]

2,5 ... drawing device, 9 ... connection plate, 10,12 ... main circuit terminal,
11… Auxiliary equipment base

Claims (2)

(57) [Claims] 1. A drawer of two kinds of auxiliary equipment is superposed to form a stackable drawer, and the height and main circuit terminal position of the stacker and drawer of a circuit breaker are substantially the same. A closed switchboard characterized by storing these drawer-type devices in multiple stages. 2. The draw-out device according to claim 1, wherein one of the auxiliary devices is arranged on a mounting base provided between main circuit terminals of the draw-out device of the circuit breaker. Item 7. A closed switchboard according to item 1.