JPH0736645B2 - Gas insulated electrical equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a three-phase breaker housed in a container, and a three-phase current transformer that passes through a connecting conductor of the three-phase breaker. The present invention relates to a gas-insulated electric device equipped with.

[Prior Art] Conventionally, as this type of gas-insulated electric equipment, there is one shown in FIGS. 5 and 6. In FIG. 5 and FIG. 6, the three-phase cutoff portions (1a) to (1c) are housed in, for example, a grounding container (2) in which an insulating gas is filled, and each axis has a substantially isosceles triangular shape. It is located at the vertex or the vertex of an equilateral triangle. The three-phase current transformers (3a) to (3c) are housed in the grounding container (2), and the three-phase breakers (1a) to (1c).
It is arranged on the axis extension line of. Three-phase conducting conductor (4
a) to (4c) pass through the hollow portions of the three-phase current transformers (3a) to (3c) and are connected to the three-phase cutoff portions (1a) to (1c).

[Problems to be Solved by the Invention] The conventional gas-insulated electric equipment is configured as described above, and the three-phase current transformer (3a) to the extension of the axial center of the cutoff portions (1a) to (1c).
Since (3c) is arranged, there is a drawback that it is affected by the high temperature gas generated when shutting off.

Therefore, conventionally, as shown in FIG. 5, three-phase breakers (1a) to (1c) and three-phase current transformers (3a) to (3c) are used.
A large distance X from the three-phase current transformers (3a) to (3c)
However, there was a problem that the equipment configuration became large.

The present invention has been made to solve the above problems, and an object thereof is to provide a gas-insulated electric device in which a three-phase current transformer is not affected by high-temperature gas without increasing the size of the structure. And

[Means for Solving the Problems] A gas-insulated electric device according to the present invention is housed in a container, and each axis has a first isosceles triangle or an equilateral triangle.
A three-phase circuit breaker having a first circuit breaker, a second circuit breaker, and a third circuit breaker arranged near the apex, the second apex, and the third apex, respectively, and stored in the container. A first current transformer, a second current transformer, and a third current transformer that are electrically connected to the first circuit breaker, the second circuit breaker, and the third circuit breaker, respectively. Have
The axis of the third current transformer is located at a point extending a line connecting the first vertex and the center of the triangle from the center to the opposite side by a distance substantially equal to the distance between the center and the first vertex. And a line connecting the second apex and the center is extended to the opposite side from the center by a distance substantially equal to the distance between the center and the second apex of the second current transformer. Place the axis,
The axis of the first current transformer is arranged at a point where a line connecting the third vertex and the center extends from the center to the opposite side by a distance substantially equal to the distance between the center and the third vertex. The three-phase current transformer, the first current-carrying conductor that penetrates the hollow portion of the first current transformer and is connected to the first circuit breaker, and the hollow portion of the second current transformer. It has a second current-carrying conductor that penetrates and is connected to the second circuit breaker, and a third current-carrying conductor that penetrates through the hollow portion of the third current transformer and is connected to the third circuit breaker. It is equipped with three-phase conducting conductors.

[Operation] In the gas-insulated electric device according to the present invention, the axis of the three-phase breaker is arranged near each vertex of an isosceles triangle or an equilateral triangle, and a three-phase current transformer is formed by the three-phase breaker. The isosceles triangle or equilateral triangle is rotated by about 180 degrees around its center point, and its axis is placed at each vertex of the isosceles triangle or equilateral triangle. Is not exposed to the high temperature gas from the shutoff portion that occurs during shutoff.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the gas-insulated electric device according to the present invention, in which the three-phase interruption parts (1a) to (1c) are
It is housed in, for example, a grounded container (2) in which an insulating gas is sealed, and its axis is arranged near each vertex of an isosceles triangle or near each vertex of an equilateral triangle. The three-phase current transformers (3a) to (3c) are housed in the grounding container (2) and are isosceles triangles formed by the respective axial centers of the three-phase interruption parts (1a) to (1c) or The axes of the three-phase current transformers (3a) to (3c) are placed near the vertices of an isosceles triangle or an equilateral triangle formed by rotating the center of the equilateral triangle by approximately 180 degrees. Has been done. In other words,
Each of the first circuit breaker (1a), the second circuit breaker (1b), and the third circuit breaker (1c) has an axis that is substantially an isosceles triangle or an equilateral triangle at the first vertex and the second circuit breaker. They are arranged near the vertex and the third vertex, respectively. Three-phase current transformer (3a) ~
In (3c), a line connecting the first apex where the axial center of the first circuit breaker (1a) is arranged and the center of the triangle is substantially defined between the center of the triangle and the first apex. The axis of the third current transformer (3c) is arranged at a point extending from the center of the triangle to the opposite side by an equal distance, and the axis of the second current breaker (1b) is arranged in the second center. The line connecting the apex and the center of the triangle is extended from the center of the triangle to the opposite side by a distance substantially equal to the distance between the center of the triangle and the second apex of the second current transformer (3b). A line that connects the center of the triangle and the third apex where the center of the third circuit breaker (1c) is disposed with the axis of the third circuit breaker (1c) is substantially between the center of the triangle and the third apex of the triangle. The first points are points that extend from the center of the triangle to the opposite side by an equal distance.
The axis of the current transformer (3a) is located.

Three-phase current-carrying conductors (4a) to (4c) are three-phase current transformers (3a) to
Penetrating through the hollow part of (3c), the three-phase blocking part (1a) ~
Connected to (1c). The relationship will be described in detail with reference to FIGS. 1 and 2. Three-phase conducting conductors (4a) to (4
In c), the first conducting conductor (4a) is the first circuit breaker (1
a) and the first current transformer (3a) are connected, and the second conducting conductor (4
b) connects the second circuit breaker (1b) and the second current transformer (3b), and the third current-carrying conductor (4c) connects the third circuit breaker (1c) and the third circuit breaker (1c).
The current transformer (3c) is connected. With the above configuration, as is apparent from the figure, the first conducting body (4a), the second conducting body (4b), and the third conducting conductor (4c)
Do not cross each other.

The gas-insulated electric device of the present invention is configured as described above,
Connect the three-phase current transformers (3a) to (3c) to the three-phase breaker (1a) to
Since it is placed on an extension line at a position deviated from the axis of (1c), the influence of the high temperature gas generated when shutting off the three-phase shutoff parts (1a) to (1c) is reduced by the three-phase current transformer ( 3a)-(3c) is difficult to apply, and the three-phase breaker (1a) -shown in FIG.
The distance X between (1c) and the three-phase current transformers (3a) to (3c) can be reduced.

3 and 4 show another embodiment of the gas-insulated electric equipment according to the present invention. In FIGS. 3 and 4, the grounding container (2A) is provided with an outlet portion (201) bent at about 90 degrees with respect to the axis of the three-phase blocking portions (1a) to (1c), The three-phase current-carrying conductors (4a) to (4c) are led out from the outlet (201) to the outside of the grounding container (2A). Also in this embodiment, as in the embodiment of FIGS. 1 and 2,
The effect is that the three-phase current transformer is not affected by the high-temperature gas without increasing the size of the device.

[Advantages of the Invention] As described above, according to the present invention, the current transformer is less likely to be affected by the high-temperature gas generated at the time of shutting off the shutoff portion, and therefore the distance between the current transformer and the shutoff portion can be reduced. There is an effect that the configuration of the device can be downsized.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a gas-insulated electric device according to the present invention, FIG. 2 is a lateral sectional view taken along line II-II of FIG. 1, and FIG. 3 is a gas-insulated electric device according to the present invention. FIG. 4 is a side sectional view showing another embodiment of the apparatus, FIG. 4 is a lateral sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a side sectional view showing a conventional gas-insulated electric apparatus, and FIG. FIG. 6 is a transverse sectional view taken along line VI-VI in FIG. 5. In the figure, (1a) to (1c) are three-phase cutoff parts, (2) is a grounded container, (3a) to (3c) are three-phase current transformers, and (4a) to
(4c) is a three-phase conducting conductor. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A first vertex, a second vertex, and a third vertex of an isosceles triangle or an equilateral triangle, each of which has an axis centered in a container and is housed in a container.
A first circuit breaker and a second circuit breaker respectively disposed near the apex of the
A three-phase circuit breaker having a circuit breaker and a third circuit breaker, and electrically connected to the first circuit breaker, the second circuit breaker, and the third circuit breaker, respectively, housed in the container. Having a first current transformer, a second current transformer, and a third current transformer connected,
The axis of the third current transformer is located at a point extending a line connecting the first vertex and the center of the triangle from the center to the opposite side by a distance substantially equal to the distance between the center and the first vertex. And a line connecting the second apex and the center is extended to the opposite side from the center by a distance substantially equal to the distance between the center and the second apex of the second current transformer. Place the axis,
The axis of the first current transformer is arranged at a point where a line connecting the third vertex and the center extends from the center to the opposite side by a distance substantially equal to the distance between the center and the third vertex. The three-phase current transformer, the first current-carrying conductor that penetrates the hollow portion of the first current transformer and is connected to the first circuit breaker, and the hollow portion of the second current transformer. It has a second current-carrying conductor that penetrates and is connected to the second circuit breaker, and a third current-carrying conductor that penetrates through the hollow portion of the third current transformer and is connected to the third circuit breaker. A gas-insulated electric device comprising a three-phase conducting conductor.