JPS633136Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-phase capacitor having multiple elements per phase.

As shown in Figure 1, the conventional three-phase capacitor is
A plurality of elements 1... are arranged in three phases in parallel, an insulating plate 2 is arranged between each phase, fixed with a band 3 or a string, etc., and this is inserted into the case 4, and the case 4
and the element group were insulated with insulating paper 5. In this case, since there are a plurality of elements 1, they cannot be fixed completely by the insulating plate 2 and the band 3, and the element group may collapse when stored in the case 4, making assembly difficult. Therefore, multiple elements for each phase are housed in three insulating tubes, and the insulating tubes are inserted into an insulating support plate that has holes into which the three insulating tubes each containing multiple elements are inserted. It is also possible to insert and fix the three insulating tubes into the case via the support plate with the insulating tubes parallel to each other, but in this case, the elements housed in the insulating tubes may move and move away from the insulating tubes. Parts of the tube may protrude, making it impossible to maintain sufficient insulation between the phases, and the supporting plate for fixing the insulating cylinder must be made thicker otherwise it will become unstable.

The present invention was developed to solve this problem, and consists of housing multiple elements for each phase in three insulating cylinders, and fitting the ends of the three insulating cylinders with a roughly shaped cross-section. The three insulating supports are provided with two insulating supports having recesses, and the two supports are positioned at both ends of three insulating tubes in which the plurality of elements are housed, respectively, and the two ends are fitted into the recesses of the supports. By inserting the insulating cylinder in a parallel state into the case, the insulating cylinder and the element can be easily inserted into the case, and the insulating cylinder and the element can be prevented from moving within the case. This ensures reliable insulation between each phase.

Below are drawings showing an example of implementing the present invention (Figs.
The explanation will be based on FIG. 7). In the figure 11...
is an insulating cylinder made of an insulating material such as resin or pressboard, and a plurality of elements 12 for each phase are inserted into each insulating cylinder 11. Reference numeral 13 denotes three recesses 14 into which the ends of the three insulating cylinders 11 are fitted.
... is an insulating support body made of resin and having a roughly shaped cross section, and the outer dimensions of this insulating support body 13 are the case 15.
It is slightly smaller than the inner dimensions. The insulating supports 13, 13 are located at both ends of the three insulating cylinders 11 into which the plurality of elements 12 are inserted, and the recess 1
Both ends of the insulating cylinders 11 are fitted into the three insulating cylinders 11, and the three insulating cylinders 11 are kept parallel to each other. In this state, it is inserted into the case 15. Note that each of the recesses 14
It has a protruding wall part 14a that fits inside the end of each insulating cylinder 11 at the bottom thereof, and the element 12 can come into contact with this protruding wall part 14a. 16, 16 is the insulating support 1
This is a cross-sectional resin insulating cover for insulating between 3 and 13 and the inner surface of the case 15, and prevents the lead wires 17 connecting the phases from coming into contact with the case 15.

The three-phase capacitor of the present invention can be implemented as described above, and by housing a plurality of elements for each phase in an insulating tube, the conventional insulating plates between the phases are no longer necessary. In addition, by supporting both ends of the insulating tube with insulating supports having a roughly shaped cross section, the element group is securely fixed, and the elements do not collapse when the entire element group is stored in the case, making it easier to assemble the device. Easy to do. Furthermore, the insulating tube and the elements can be prevented from moving within the case, and in particular, contact between the elements can be prevented, and insulation can be ensured. Further, by using an insulating support, the distance between each phase is maintained, so the influence of heat generation of an element on elements of other phases is alleviated, and the heat dissipation effect can be improved. In addition, conventional capacitors were mainly installed upright, but with this invention it is also possible to install them upside down or sideways.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing a conventional example, Figures 2 to 7
The figures show an example of the implementation of the present invention, FIG. 2 is an exploded perspective view of the main parts, FIG.
Figure 5 is an enlarged view of the main parts of the figure, Figure 5 is a perspective view of the insulating tube, Figure 6 is
The figure is a perspective view of the insulating support, and FIG. 7 is a perspective view of the insulating cover. 11... Insulating tube, 12... Element, 13... Insulating support, 14... Recess, 15... Case, 16...
...Insulating cover.

Claims (1)

[Scope of utility model registration request] A plurality of elements for each phase are housed in three insulating cylinders, and two insulating supports each having a roughly shaped cross-sectional shape and having a recess into which the ends of the three insulating cylinders are fitted are provided, and each of the plurality of elements is The two supports are positioned at both ends of the three insulating cylinders housed, and the two ends are fitted into the recesses of the supports to make the three insulating cylinders parallel, and the three-phase insulating cylinders are inserted into the case. capacitor.