JPS6116723Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a closed power distribution board with an improved structure of the control equipment attachment part of the box.

Figures 1 and 2 are examples of conventional closed switchboards.
The front part constitutes an equipment room 2 for storing electrical equipment such as a sheath disconnector 1, and the rear part constitutes a bus bar room 4 for storing a bus bar 3. The sheath disconnector 1 is housed in an equipment room 2 partitioned off by a partition plate 5, and has a multi-stage stacked structure. Furthermore, the control line 8 of the disconnector 1 is relayed to a terminal block 6 provided on the inner surface of the equipment room 2, and connected to an external control cable 7 via this terminal block 6.

In this case, the external control cable 7 passes through the through holes formed in each partition plate 5 one after another.
However, this wiring work must be carried out in a narrow panel, which is difficult, and there is a risk that the outer surface of the external control cable 7 may come into contact with the edge of the through hole and damage the cable sheath.

An object of the present invention is to provide a closed power distribution board that allows wiring connections to be easily made without damaging the external control cables when connecting the external control cables to the terminal blocks provided in the equipment room.

The present invention will be explained below with reference to an embodiment shown in FIGS. 3, 4, and 5. FIG. 3 shows a closed power distribution board according to the present invention, in which, as in the conventional case, the front part has an equipment room 11 for storing electrical equipment such as a wire cutter 10,
A busbar chamber 13 for housing the busbar 12 is formed in the rear surface. Moreover, the disconnector 10 is housed in an equipment room 11 partitioned by a partition plate 15, and has a stacked structure in multiple stages. The partition plate 15 is bent so as to push out the space at the front of the equipment room 11, which avoids the arc blowing space from the lower tier breaker 10, to form a recessed space 18. The terminal block 19 is stored in the terminal block 19.

A control line 25 wired from the shield breaker 10 is relayed to the terminal block 19. Further, the external control cable 21 is connected to the recessed space 18 as shown in FIG.
It rises through a duct 22 installed on the side of the.

As shown in FIG. 4, the duct 22 is formed by a partition plate 22a located between the duct 22 and the recessed space 18, and the inner surface of the equipment chamber 11. The width of this partition plate 22a is shortened at the edge opposite to the front side of the equipment room 11, that is, the lower surface in FIG. A large gap 22b is formed. Note that this gap 22b is hidden from the outside by a bent portion 11a formed at the front end of the side plate of the equipment chamber 11. In addition, in the portion of the partition plate 22a facing each of the recess spaces 18, a cutout portion 16 of a certain range extending in the vertical direction is provided for each partition plate 15, as shown in FIGS. 3 and 5. Form. Further, a guide plate 17 is provided between the lower end of this notch 16 and the partition plate 15.

Here, the external control cable 25 rises through the duct 22 as described above, but in this case, as in the conventional case shown in FIG. Rather than raising the cable up, as shown in FIG. 3, the cable is raised outside the cable pit 20 for a predetermined length, and then it is inserted into the duct 22 through the gap 22b formed on the front surface of the duct 22, as shown by the arrow in FIG. Insert into. And each guide plate 1
7 to the corresponding terminal block 19. Therefore, the external control cable 25 will not be damaged by the edge of the through hole made in the partition plate as in the conventional case, and the cable installation work can be done from the front side through the gap 22b.
All you have to do is push it through the duct 22, which is much easier than before.

Furthermore, since the relay terminal block is located at the front lower part of the equipment room, its connection status can be easily inspected from the front side by opening the door. In addition, the installation space for this terminal block was created by using the front part of the upper part of the equipment room that does not directly affect the arc blowout, and by bending the partition plate of the upper equipment room downward. It does not require much space, and as a result, it has been made more compact due to the effective use of space.

As described above, according to the present invention, when wiring and connecting external control cables to each equipment room in a multi-tiered configuration, a duct placed across each equipment room is used, and a gap formed in the duct is used. This eliminates the troublesome work of passing the external control cables one by one through the through holes provided in the partition plate, as was the case in the past, and also prevents damage to the cable sheath that may occur during this process. can be effectively prevented,
Furthermore, the relay terminal block can be easily inspected, and since the space inside the panel is effectively used as the installation space for this purpose, it can be configured compactly without increasing the size.

[Brief explanation of the drawing]

1 and 2 are a partial plan view and a side view showing a conventional closed power distribution board, FIG. 3 is a perspective view showing an embodiment of a closed power distribution board according to the present invention, and FIGS. 4 and 5 are FIG. FIG. 2 is an enlarged plan view and a front view showing main parts of the FIG. 10...Electrical equipment, 11...Equipment room, 15...
Partition plate, 19...Terminal block, 21...External control cable, 22...Wiring duct, 22b...Gap.

Claims (1)

[Scope of utility model registration request] In a closed power distribution board that has a plurality of equipment rooms partitioned vertically by partition plates along the horizontal direction in order to accommodate a breaker having an arc outlet at the upper part, a device installed in the equipment room below the partition plate. The leading edge of the arc outlet of the arc breaker is bent downward to form a recessed space located below the outward pull-out passage of the arc breaker. A relay terminal block is installed for the control circuit, and a wiring duct that communicates vertically is installed on the side of each equipment room.
A notch of a certain range is formed on each side of this wiring duct facing the recessed space, and a gap slightly wider than the outer diameter of the external control cable is formed on the side of this wiring duct facing the front of the panel. A closed power distribution board is formed along the vertical direction, and a control cable introduced from the outside is connected to a relay terminal block provided in the recessed space in the corresponding equipment room via the wiring duct.