JPS6111946Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a three-phase integrated electric device in which three-phase conductors are housed in one container.

FIG. 1 shows a conventional electrical device. In the figure, 1, 2, 3 are the first conductors, respectively U
Currents with phase differences of 120 degrees are flowing in phase, V phase, and W phase. 4 is a container containing the first conductors 1, 2, 3 and an insulating gas; 5, 6, 7 are containers 4 in which the first conductors 1, 2, 3 and the container 4 are closest to each other;
A second conductor is provided near the inner surface, and each end thereof is electrically connected to each other.

In such a configuration, the second conductors 5, 6,
An induced current flows through the container 7, and this induced current reduces the induced current in the container 4, thereby reducing the temperature rise in the container 4.

In the conventional electric device, the second conductors 5, 6, 7 are provided near the inner surface of the container 4 where the first conductors 1, 2, 3 and the container 4 are closest to each other. When applying a high voltage to 2 and 3, there was a drawback that the container had to be made larger.

This invention was made to eliminate the above-mentioned drawbacks, and provides an electrical device with a smaller container and a reduced temperature rise in the container.

An embodiment of this invention shown in FIGS. 2 and 3 will be described below. 8, 9, 10 are container 4
A pair of second conductors provided on both sides of the center line at a predetermined angle from the center of the container 4 with respect to the center line 11 connecting the centers of the first conductors 1, 2, and 3, It is arranged opposite to the first conductors 1, 2, and 3. These first conductors 1, 2, and 3 are made of a material having a higher dielectric constant than the container 4.
12 connects the end of each second conductor 8, 9, 10 to the container 4.
A shorting member that electrically connects the ends of the second conductors 8, 9, and 10 and connects the ends of each of the second conductors 8, 9, and 10 to each other. Since the first conductors 1, 2, and 3
is provided only on the adjacent side. Note that the shorting member 12 is also provided on the other end (not shown) side of the second conductors 8, 9, and 10.

In such a configuration, the second conductors 8, 9,
The loss caused by the magnetic flux generated in the container 4 being canceled by the induced current flowing through the container 10 is reduced.

FIG. 4 is an explanatory diagram illustrating the operation of one embodiment of the invention shown in FIGS. 2 and 3. FIG. In FIG. 2, a center line 11 connects the point where the first conductors 1, 2, 3 and the container 4 are closest to the center of the container 4.
Let θ be the angle between the line 1 and the side of the second conductor 8, 9, 10 on the side where the second conductor 1, 2, 3 and the container 4 are closest to each other. As shown in FIG. 2, when two second conductors 8, 9, 10 of the same shape are provided for each of the second conductors 8, 9, 10 and the angle θ is changed, the container 4 and second
The total loss W including the conductors 8, 9, and 10 is as shown in FIG. When the second conductors 8, 9, 10 are provided near the position at an angle of 45°, the second conductors 8, 9,
The value is almost the same as when 10 is not provided. Further, the total loss W decreases when the angle θ is decreased, but increases when the angle θ approaches 0°. That is, there is a local minimum value in the loss value. Therefore, it is appropriate to set the angle θ to 15° or less.

This idea can be applied to gas insulated busbars, gas shields, disconnectors, disconnectors, etc.

As described above, according to this invention, the conductor is symmetrically spaced at a predetermined angle from the center of the container with respect to the center line connecting the respective centers of the cylindrical metal container and the first conductor. By providing a pair of second conductors in the container facing the first conductor and electrically connecting the ends of the second conductors, the container is made smaller,
It is possible to reduce the temperature rise in the container.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional electrical device, Fig. 2 is a perspective view showing an embodiment of this invention, Fig. 3 is a front sectional view of Fig. 2, and Fig. 4 is an embodiment of this invention. It is an explanatory diagram explaining characteristics. In the figure, 1, 2, 3 are first conductors, 4 is a container,
5, 6, and 7 are second conductors. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) In a cylindrical metal container in which a first conductor of each of three phases is housed in the axial direction, each center of the container and the first conductor A pair of second conductors are provided in the container facing the first conductor symmetrically with respect to the center line at a predetermined angle from the center of the container, An electrical device characterized in that the ends of each phase of a conductor are electrically connected to each other. (2) The angle between the center line connecting the center lines of the container and the first conductor and the line connecting the side of the first conductor on the side of the center line and the center line is 15 degrees or less. An electrical device according to claim 1, characterized in that: