JPS6036681B2 - closed switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closed power distribution board (hereinafter referred to as a board), and relates to a disconnection structure from electrical equipment housed therein.

In the conventional panel, as shown in FIG. 1, the connection bushings 6a to 6c and 7a to 7c of the electrical equipment housed in the panel 1, such as the shield disconnector 2, are arranged along the horizontal direction of each phase. It is usually placed.

In such a case, the shapes of the main circuit break sections (hereinafter referred to as PDS) 4a, 4b, 4c that connect to the bus bars 3a, 3b, 3c are a linear PDS 4b and an S-shaped PDS 4a, 4c.
Two types were necessary. In order to use one type of POS, as shown in FIGS. 2 and 3, the bushings 6a, 6b, 6c of the breaker
They are arranged diagonally and shifted from each other by an interphase distance of c. In this case, the shapes of the PDSs 4a, 4b, and 4c can be made into one type, but the height of the breaker 2 increases, and the height of the board 1 also increases. The purpose of the present invention is to improve the arrangement of the bushings on the busbar side of the breaker, so that the same connection conductor can be used for each phase to connect between the panel side and the busbar, and the overall shape can be made compact. The goal is to obtain a closed switchboard. The present invention is illustrated in FIGS. 4 to 6.
Description will be made with reference to an embodiment shown in the drawings.

In FIGS. 4 and 5, the heights of the busbar side bushings 6a, 6b, and 6c of the sheath breaker 2 are set as follows.

The height of the second phase bushing 6b and the first phase bus bar 3a are the same height, and the first and third phase bushings 6a,
6c is made to be the same height as the second phase generatrix 3b. Further, the third phase bus bar 3c is provided further down at an interval substantially equal to the interval between the first phase and FIG. and bushing 6a
, 6b, 6c and the busbars 3a, 3b, 3c are curved into almost the same shape for each phase.
It is configured to connect at b and 4c. Said PDS4a,
4b, 4c and the busbars 3a, 3b, 3c are connected to the sixth
Configure as shown. That is, taking the second phase as an example, the bare part 3b' of the bus bar 3,b is sandwiched between the bolt 12 and nut 13 by the contact 10 fixed to the end of the PDS 4b and the presser contact 11 that engages with it. Fix it with. - In the board with the above configuration, bus bars 3a, 3b, 3
The PDSs 4a, 4b, and 4c in the example connected to c may have one type of shape.

Furthermore, compared to the conventional method of arranging the bushings 6a, 6b, and 6c of the shroud breaker 2 diagonally for three phases as shown in Figs. can do. The load-side disconnector bushing, that is, the one shown in the lower part of the figure, is connected to the current transformer 8 and the cable 9 through the POS 5, as shown in FIG. 7b and 7c are also connected to the bus bar 3a as shown in FIG.
, 3b, 3c, if the second phase 7b is shifted upward by the distance between the two phases, the generatrix 3a, 3b, 3c will be located in the position corresponding to the bushing 7a, 7b, 7c, that is, in the lower part of the panel. The present invention can be applied in the same manner even if the present invention is used, which is more advantageous, and an increase in the total height of the shingle breaker 2 can be prevented.

As described above, according to the present invention, the busbar side has one type of P.
DS may be used, and since the increase in the total height of the cutter and the total height of the panel due to the common PDS can be minimized, an inexpensive and compact panel can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are side views of a conventional closed power distribution board, FIG. 3 is a cross-sectional AA view of FIG. 5 is a sectional view BB of FIG. 4, FIG. 6 is a perspective view showing a PDS used in the present invention, and FIG. 7 is a sectional view corresponding to sectional view BB of FIG. 4, showing another embodiment of the present invention. be.

1...Closed switchboard, 2...Electrical equipment, 3a
, 3b, 3c... Bus line, 4a, 4b, 4c...
...Main circuit disconnection section, 6a, 6b, 6c...
Busbar side bushing.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1 A three-phase bus is arranged inside, and the three-phase bus and the bushing of the housed electrical equipment are connected to the disconnecting part, and the bushing has a connection between the first phase and the third phase. They are arranged at the same height, and the ones of the second phase are arranged vertically shifted from those of the other phases, and the ones of one of the outer phases and the intermediate phase of the three-phase generatrix are arranged at the same height as those of the other phases. The remaining phases are arranged at approximately the same height as the bushing, and the remaining phases are arranged vertically shifted at intervals almost equal to the arrangement interval of the above two phases, and the A closed power distribution board with disconnecting parts bent into almost the same shape.