JPS608489Y2 - closed switchboard - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a closed switchboard (hereinafter referred to as a board) with an improved conductor configuration.

Figures 1 to 4 show a conventional closed switchboard bus bar configuration in which a horizontal bus bar 1 and a vertical bus bar 2 are connected, and this vertical bus bar 2 is connected to the power supply side terminals of devices 3 stored in multiple stacks. The load side terminal and the feeder conductor 4 are connected.

The busbar configuration in which the vertical busbar 2 is provided and the devices 3 stored in multiple stacks are connected to the vertical busbar 2 is an effective method for reducing the depth of the panel. Since the feeder conductors 4 intersect with each other, it is necessary to avoid these intersections by an appropriate method.

In the conventional example shown in FIGS. 1 and 2, as shown in FIG. 2, the feeder conductor 4 is bent to pass through the intermediate portion of each vertical bus bar.

In the conventional example shown in FIGS. 3 and 4, a U-shaped vertical generatrix 2 is used, and a through hole 2a is provided in the middle of this U-shape.
The feeder conductor 4 is passed through this hole 2a.

However, in the former example, the feeder generatrix 4 requires bending, and in the latter example, the vertical generatrix 2 requires drilling, which increases the number of processing steps.

In addition, it requires a lot of space in the width direction of the board,
When applied to a large current capacity, there is a drawback that the external dimensions of the panel become large.

The purpose of this invention is to reduce the width and depth of the board by bringing conductor intersections other than the specified connections into close contact via an insulator, and to quickly prevent insulation deterioration at these insulation intersections. The object of the present invention is to provide a closed switchboard that detects the occurrence of accidents and prevents them from occurring.

The present invention will be explained with reference to an embodiment shown in FIGS. 5 and 6.

The horizontal busbar 5 is connected to the vertical busbar 8 of the corresponding phase as shown in FIG. 6, and similarly the horizontal busbar 6 is connected to the vertical busbar 9 and the horizontal busbar 7 is connected to the vertical busbar 10.

One terminal of the device 15, for example, the power supply side terminal 16, is connected to conductive spacers 17, 18, . . . by the conductors 12, 13, 14.
19 to the vertical busbars 8, 9 and 10.

The feeder conductor 20 is connected to the other terminal of the device 15, such as a load-side terminal 21, and is disposed in close contact with the vertical bus bar 8 via an insulator 22.

Similarly, the horizontal busbars 5, 6°7 are the same as the vertical busbars 8,9. 10 and are in close contact with each other via an insulator 23.

Here, the above insulation intersection, for example, the vertical busbar 8°9.10
As shown in detail in FIG. 7, insulators 22at22b are attached to both the vertical busbars 8, 9, 10 and the feeder conductor 20, and a grounded metal 24 is placed between them. is inserted.

Further, as shown in FIGS. 5 to 7, the direction of arrangement of the conductors is the vertical bus line 8. 9. 10, conductor 12, 13, 14
, the feeder conductor 20 and the horizontal busbars 5, 6, and 7 are arranged so that the board width and depth dimensions are minimized, and the width direction of the strip conductor, that is, the strip surface runs along the vertical direction.

According to the above configuration, the feeder conductor 20 is arranged in close contact with the vertical busbar 8 via the insulator 22, and furthermore, the vertical busbars 8, 9, 10, the conductors 12, 13, 14, and the feeder conductor 20 are Since the board width is minimized, sufficient space can be secured between the vertical generatrix lines 8° and 9.10°.

Moreover, since the horizontal generatrix lines 5, 6, and 7 are arranged so that the depth direction of the board is minimized, it is possible to provide a board that occupies a small area.

Furthermore, as shown in FIG. 7, since the ground metal 24 sandwiched between the insulators 22a and 22b was inserted between the vertical bus bar 8 and the feeder conductor 20, the insulation between the vertical bus bar 8 and the feeder conductor 20 deteriorated. In this case, a ground fault current flows through the ground metal 24, and the deterioration of the insulation can be detected by using this ground fault current to trip the upper breaker, or by using a ground fault relay or the like.

That is, since insulation deterioration can be detected early before a short circuit occurs, it is possible to prevent a major accident from occurring.

Further, according to the above configuration, simply by increasing the number of horizontal busbars 5, vertical busbars 8, and feeder conductors 20, it is possible to easily cope with an increase in the capacity of the current flowing.

FIG. 8 shows another embodiment of the present invention, in which vertical busbars 8 are spaced apart in order to cope with an increase in current flow, and a plurality of feeder conductors 20 are passed through between the vertical busbars 8.

For insulation between the vertical bus bar 8 and the feeder conductor 20, if the insulator 22 shown in FIG. 9 is used, a plurality of conductors can be insulated by simply replacing the left and right ones of the same shape.

Of course, a ground metal is provided between these insulators 22 so that insulation deterioration can be detected early.

As described above, according to the present invention, it is possible to have a compact bus bar configuration that can easily accommodate an increase in the capacity of the applied current, and moreover, it is possible to prevent major accidents due to insulation deterioration.

[Brief explanation of drawings]

Figure 1 is a side view of a closed switchboard showing a conventional bus bar configuration, Figure 2 is a sectional view taken along the 3 is a cross-sectional view taken along IV-IV in FIG. 3, FIG. 5 is a side view showing an embodiment of the closed switchboard according to the present invention, FIG. 6 is a cross-sectional view taken along VI-VI in FIG. 5, and FIG. 7 is a main part of the present invention. FIG. 8 is an enlarged perspective view showing another embodiment of the present invention, and FIG. 9 is a detailed view showing an insulator used in the present invention. 5, 6.7...Horizontal generatrix, 8,9.10...
... Vertical bus bar, 20 ... Feeder conductor, 22
, 23..., insulator, 24...... ground metal.

Claims (1)

[Scope of utility model registration request] A panel frame is provided with multiple levels of equipment rooms that house electrical equipment, and busbar rooms are provided adjacent to these equipment rooms, and one terminal of the equipment is connected to a vertical busbar provided in this busbar room.
and connect the feeder conductor to the other terminal of the electrical equipment,
In a closed switchboard in which each phase of the vertical busbar is connected to a corresponding phase of a horizontal busbar arranged with the phases spaced apart in the vertical direction, strip-shaped conductors are used for the feeder conductor, the vertical busbar, and the horizontal busbar, and these strips are connected to each other. Place the faces along the vertical direction,
In addition, at the intersections of these conductors, except for designated connection points, insulators with a chevron-shaped cross section are attached to each conductor, and a grounded metal is interposed between these insulators to closely connect them. A closed switchboard featuring: