JPS6110407Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a three-phase all-in-one type gas insulated device with bushings, in which bushings for each phase are connected to a three-phase all-in-one container.

FIG. 1 shows an example of a conventional three-phase all-in-one gas insulated device with bushings of this type. This gas insulated equipment houses three-phase busbars 1A to 1C all at once, and has a three-phase branch pipe section 2A on the outer periphery.
~2C is provided with a bus bar container 2 with a branch protruding from it,
Bushings 4A and 4C are connected to the horizontal two-phase branch pipe parts 2A and 2C via L-shaped small containers 3C and 3C, and bushings 4 are connected to the upward branch pipe part 2B.
B is directly connected, bushing conductors 4a and 4c of bushings 4A and 4C are connected to bus bars 1A and 1C via intermediate conductors 5a and 5c, bushing conductor 4b of bushing 4B is directly connected to bus bar 1B, and L Insulating spacers 6A, 6C are installed at the connection parts between the small containers 2A, 2C and the branch pipe parts 2A, 2C, respectively.
The bushing conductors 4a, 4c and the intermediate conductors 5a, 5c, which are bent and connected in an L-shape, are supported.

However, in such a structure, not only the L-shaped small containers 3A and 3C are required, but also the bushing conductor 4.
Since a, 4c and intermediate conductors 5a, 5c are connected in an L-shape, an insulating spacer is used to support these conductors in order to withstand the electromagnetic force that acts on these parts when a large current flows. 6A, 6C
This has the drawback of increasing costs. In addition, in such a structure, the L-shaped small container 3A,
Since the 3C etc. protrude horizontally, it has the disadvantage of taking up a large amount of installation space.

The present invention proposes a three-phase integrated gas insulated device with bushings that can overcome the above-mentioned drawbacks, and will be described in detail below with reference to embodiments shown in the drawings.

FIG. 2 shows a first embodiment of the present invention. The three-phase collective type gas insulated equipment with bushings of this embodiment includes three-phase branch pipes 2A to 2A of the busbar vessel 2 with branching.
2C so as to protrude upward or diagonally upward from the same circumference of the container 2, and so that the angle θ formed by the adjacent branch pipe parts 2A and 2B and the angle θ formed between 2B and 2C are each within 90°. , the bushings 4A to 4C are directly connected to these branch pipe portions 2A to 2C, and these bushings 4A to 4
Connect the straight bushing conductors 4a to 4c of C to each bus bar 1.
It is directly connected to A to 1C.

FIG. 3 shows an example of the connection between the bushing conductor 4a and the bus bar 1A. That is, in this connection part, a bar-shaped connection protrusion 7 is provided integrally with the bus bar 1A, and a plurality of contact pieces 8 are provided on the outer periphery of the end of the bushing conductor 4a.
A pressure spring 9 is fitted to the outer periphery of these contact pieces 8 to bias these contact pieces 8 in the closing direction, and a shield 1 is provided on the outside of these contact pieces 8.
0, grip the connection protrusion 7 with the tip of each contact piece 8 to make the connection, and connect the bushing conductors 4a to 4.
In order to mechanically limit the lateral movement of c, the tip of the connecting protrusion 7 fits into a recess 11 provided at the end of the bushing conductor. Note that the connection portions between the other bushing conductors 4b, 4c and the bus bars 1B, 1C have a similar structure.

4 and 5 show a second embodiment of the present invention. In the three-phase lump-type gas insulated equipment with bushings of this embodiment, the branch pipe parts 2A and 2C protrude from the same circumference of the container 2, and the branch pipe part 2B is separated from the circumference by a distance of d. The only difference is that the second embodiment projects from different circumferences, and the other features are the same as those of the first embodiment.

6 and 7 show a third embodiment of the present invention. In the three-phase collective type gas insulated equipment with bushings of this embodiment, the branch pipe parts 2A to 2C project obliquely upward radially from the container 2 at an angle α with a common point A as the apex. This embodiment differs from the first embodiment only in this point, and is the same as the first embodiment in other respects.

The three-phase all-in-one gas insulated equipment with bushings shown in the first to third embodiments is suitable for use, for example, in three-phase all-in-one gas insulated switchgear.

As explained above, the three-phase collective type gas insulated equipment with bushings according to the present invention has a structure in which the branch pipe portions of each phase protrude upward or diagonally upward with respect to the busbar container, and the branch pipe portions have a structure in which each phase Since the bushings are connected in a straight line, the conductor connecting the tip of the bushing and each bus bar is straight, and the influence of electromagnetic force is extremely reduced, so that the insulating spacer in the single-phase part can be omitted. Moreover, with such a structure, the L-shaped small container can also be omitted. Therefore, according to the present invention, the number of parts is reduced, assembly is facilitated, and costs can be reduced. Furthermore, in the present invention, all the branch pipe parts are oriented upward or diagonally upward, so that the horizontal overhang is reduced, and the installation space can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a conventional three-phase collective type gas insulated equipment with bushings, Fig. 2 is a schematic cross-sectional view showing the first embodiment of the present invention, and Fig. 3 is a connection between the bushing conductor and the bus bar. 4 and 5 are plan views and side views showing a second embodiment of the present invention, and FIGS. 6 and 7 are plan views showing a third embodiment of the present invention. and a side view. 1A to 1C... Bus bar, 2... Bus bar container with branch,
2A to 2C... branch pipe section, 4A to 4C... bushing, 4a to 4c... bushing conductor.

Claims (1)

[Claims for Utility Model Registration] (1) Bushings on the extension of each branch pipe part of a bus bar container with a branch which accommodates three phase bus bars all at once and has branch pipe parts for each phase protruding from the outer periphery. In the three-phase collective gas insulated equipment with bushings, each of the branch pipe portions is provided upwardly or diagonally upward from the bus bar container, and each of the bushings is connected straight to each of the branch pipe portions,
A three-phase integrated type gas insulated device with bushings, characterized in that the tip of each bushing and each bus bar are connected by a straight conductor. (2) The three-phase integrated gas insulated device with bushings according to claim 1, wherein each of the branch pipe portions protrudes from the same circumference of the busbar container so as to exist within the same plane. . (3) Two of the branch pipe portions are provided so as to protrude from the same circumference of the generatrix container so as to exist within the same plane, and the remaining one is provided on the circumference separated by a distance d from the circumference. A three-phase integrated gas insulated device with bushings as set forth in claim 1 of the utility model registration projecting from above. (4) The three-phase integrated gas insulation with bushing according to claim 1, wherein each of the branch pipe portions projects diagonally upward from the bus bar container in a radial manner with one common point as the apex. device.