JP2523476Y2 - Attached structure of live part of bushing in power distribution equipment - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is a structure for mounting a charging portion of a bushing in a power distribution device.

[Related Art] Conventionally, a charged portion such as an electrode provided on a bushing is attached along an axis of the bushing. And such a conventional power distribution device such as a switch is manufactured under the following conditions.

Due to the size of the bushing itself, the spacing between the bushings cannot be less than a certain value.

The distance between the charging part of the bushing and the case wall surface cannot be less than a certain value in order to secure an insulating space distance between the two.

Under such restrictions, in the case of conventional power distribution equipment such as a switch case, in order to reduce the size of the case,
It must be performed after satisfying this condition.

[Problem to be Solved by the Invention] An object of the invention is to provide a charging portion mounting structure of a bushing that can reduce the size of a switch case in consideration of such preconditions.

[Means for Solving the Problems] In order to solve the above-mentioned object, in the present invention, a charging portion is provided at an inner end of a plurality of bushings penetratingly arranged in a power distribution device case, and the other side adjacent to a bushing in an intermediate portion is provided. The gist is that the charging part of one bushing is deviated from the adjacent bushing.

[Operation] In the present invention, the distance between the charging portion and the case wall surface can be maintained at a certain value while the distance between the bushings is maintained at a certain value or more.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS.

 The switch of this embodiment is of a three-phase three-circuit type.

As shown in FIGS. 1 and 2, the inside of the case 10 is the first circuit 1,
It is divided into a second circuit 2 and a third circuit 3.

Since the first circuit 1, the second circuit 2, and the third circuit 3 have substantially the same configuration, only the first circuit 1 will be described for convenience of description.

As shown in FIGS. 1 and 2, the lower wall 10a of the case 10 has a through hole.
U-phase, V-phase, and W-phase bushings from above through 11,
One end portions of the bushings 5 and 6 are inserted, and the bushings 4, 5, and 6 are attached and fixed to the lower wall 10a of the case 10 via a mounting bracket 7 and a sealing packing (not shown).

At the tip of the load side bushing 4 of each phase, a copper mounting member 9 is screwed into the inner end of a conductive rod (not shown) inserted into the bushing 4. A fixed electrode 12 as a charging section is mounted and fixed by bolts 13. The fixed electrode 12 of the U-phase bushing 4
As shown in FIG. 1, U is formed in a substantially planar crank shape, and its tip portion 12a is displaced to the opposite side to the side wall 10b of the case 10, that is, as the bushing 5 on the V-phase side. Are located.

The tip 12a of the fixed electrode 12W of the W-phase bushing 6 is opposite to the fixed electrode 12U of the U-phase bushing 4, that is, on the side opposite to the side wall 10c of the case 10, that is, V
It is displaced like the bushing 5 on the phase side.

The fixed electrode 12V of the V-phase bushing 5 is formed so as to extend in parallel with the side walls 10b and 10c of the case 10, unlike the fixed electrode 12U of the U-phase bushing 4.

The power supply side bushing 1 is provided on the power supply side wall 10d of the case 10.
Reference numeral 4 denotes a bushing 4, 5, 6 attached to the lower wall 10a of the case 10 via a fitting 7 or the like. At the inner end of the bushing 14 on the power supply side, a mounting member 15a screwed to a conductive rod (not shown) of the bushing 14 is provided.
The fixed electrode 15 is provided on the inner end face of the mounting member 15a.
Are fastened and fixed by bolts 15b. The fixed electrode 15 is formed in an L-shape, and the tips of the U-phase and W-phase fixed electrodes 15 of the fixed electrodes 15 of the respective phases have respective tips similar to the bushings 4 and 6. The case 10 is located on the side opposite to the side walls 10b and 10c (see FIG. 3).

Next, the power-side bushings in each of the U, V, and W phases
The connection between 14 and the load-side bushings 4, 5, and 6 will be described using the U-phase for convenience of description.

As shown in FIG. 4, the fixed electrode of the power supply side bushing 14
Support insulator 1 provided on side wall 10e of case 10 facing 15
6, a connection plate 18 is provided on the first circuit 1, the second circuit 2, and the third circuit 3 via a mounting plate 17.

In the first circuit 1, the connection plate 18 includes the circuits 1, 2,
The base end of the braided wire 19 having flexibility corresponding to 3 is fixed.

An arm 21 is fixed between the power supply side bushing 14 and the load side bushing 4 (5, 6, 6) with respect to a main shaft 20 rotatably mounted between both side walls 10b, c of the case 10. . The arm 21 is provided with a movable electrode body 22, and a distal end of the braided wire 19 is connected to a connection terminal 21a of the movable electrode body 22. A movable contact portion 21b is provided at the tip of the movable electrode body 22, and the fixed electrode 12 of the load-side bushing 4 (5, 6) is provided.
Can be separated from the contact.

The second circuit 3 and the third circuit 3 are the same as the first circuit 1.

By the way, in the switch of the present embodiment, the tip portions 12a of the fixed electrodes 12U and 12W are displaced like the bushing 5 on the V-phase side so that the interval between the bushings 4, 5, and 6 is constant. By keeping the above, even if the switch case 10 is made compact, the insulation space distance between the fixed electrodes 12U and 12W and the case 10 can be secured.

The present invention is not limited to the above embodiment, and may be arbitrarily changed without departing from the spirit of the present invention, for example, by being embodied as a single-circuit switch or a single-phase switch.

[Effects of the Invention] As described in detail above, in the present invention, the spacing between bushings is kept at a certain value or more, and the size of the power distribution equipment case that secures the insulation space between the charging part and the case is reduced. It has an excellent effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a front view showing a fixed electrode of a switch according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a front view showing the switch, and FIG. FIG. Bushing 4,5,6, distribution equipment case 10, charging part 12U, 12V, 1
2W.

Claims (1)

(57) [Scope of request for utility model registration] 1. A charging part (12U, 12V, 12W) at an inner end of a plurality of bushings (4, 5, 6) penetratingly arranged in a power distribution equipment case (10).
Wherein the charging portion (12U, 12W) of the bushing (4, 6) adjacent to the power distribution device case (10) is deviated from the other adjacent bushing (5). Bushing bushing mounting structure.