JP2645080B2 - Three-phase batch disconnector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a three-phase collective disconnector having an improved phase arrangement.

(Prior Art) Generally, a gas insulated switchgear is configured by mutually connecting devices such as a circuit breaker and a disconnector in which a conductor is accommodated in a container in which an insulating gas is sealed.

The single line connection diagram and side view of the gas insulated switchgear are shown in FIGS. 3 and 4, respectively. In both figures, 1 is a circuit breaker, 2 is a current transformer, 3 is a line-side disconnector, 4 is a cable head, 5 is a bus-side disconnector, and 6 is a main bus. It is.

The bus-side disconnector 5 and the main bus 6 are shown in FIGS.
This is the configuration shown in the figure. That is, a three-phase conductor 8a, 8b, 8c, a branch conductor connected vertically below the conductors 8a, 8b, 8c and having movable electrodes 9a, 9b, 9c fixed to the lower end thereof in the container 7 of the same gas compartment.
10a, 10b, 10c, conductors 8a, 8b, 8c and three-phase bus conductors 11a, 11b, 11c in a twisted position, connected vertically above the bus conductors 11a, 11b, 11c and fixed at the upper end with fixed-side electrodes 12a, It houses branch conductors 13a, 13b, 13c to which 12b, 12c are fixed, and contacts 14a, 14b, 14c for opening and closing between movable-side electrodes 9a, 9b, 9c and fixed-side electrodes 12a, 12b, 12c. The conductors 8a, 8b, 8c are supported by insulating spacers 15, 15 which seal the upper opening end of the container 7. Similarly, the bus conductors 11a, 11b, 11c are supported by insulating spacers 16, 16 which seal the lower opening end of the container 7. An operation device 17 for operating the contacts 14a, 14b, 14c is provided above the container 7.
Is arranged.

By the way, the conductors 8a, 8b, 8c, the branch conductors 10a, 10b, 10c and the bus conductors 11a, 11b, 11c are respectively arranged with the A phase at the apex position of the isosceles triangle and the B and C phases arranged clockwise. The phase arrangement is the same.

For this reason, the branch conductors 13a, 13b, 13c need to be curved as shown in FIG. In particular, branch conductive 13a of the A-phase is so connected to the bus conductor 11a from the bus conductor side 11b, it is necessary to sufficiently secure a sufficient phase insulation distance L ₁ between the branch conductor 13a and the bus conductor 11b. Therefore, the center and the fixed side electrode 12a of the main bus 6, 12b, it is necessary to increase the distance L ₂ to 12c, the entire container 7 is large in size. The gas-insulated switchgear incorporating these line-side disconnectors 3 and main buses 6 also becomes large.

(Problems to be Solved by the Invention) As described above, in a conventional disconnector integrated with a bus,
Since the phase arrangement on the disconnector side and the main bus side were the same, the branch conductor had to cross the bus conductor, and the container was large.

The present invention has been made in consideration of the above points, and has as its object to provide a small three-phase collective disconnector by improving a phase arrangement.

[Configuration of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the present invention, only the phase arrangement of the second conductor is different from that of the other conductors.

(Operation) With this configuration, the second branch conductor does not need to be inserted between the second conductors, so that the length of the branch conductor can be shortened and the container can be downsized.

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1 and FIG. That is, bus side disconnector 18 and the main bus 19 are both three-phase EQUIPMENT, has a container 20 of the same gas compartment enclosing the insulating gas such as SF ₆ gas. Then, on one side inside the container 20, three-phase conductors 21a, 21b, and 21c arranged in an isosceles triangle shape orthogonal to the axis of the container 20 are stored. These conductors 21a, 21b, 2
1c is arranged so that the A-phase conductor 21a is located at the apex of an isosceles triangle.

Further, branch conductors 23 extending parallel to the axis of the container 20 and having movable electrodes 22a, 22b, 22c fixed to the ends thereof are connected to the conductors 21a, 21b, 21c, respectively.
Connect a, 23b, 23c. The branch conductors 23a, 23b, 23c are arranged in an isosceles triangular shape such that the A-phase branch conductor 23a is located at the apex of the isosceles triangle.

And, on the other side inside the container 20, the conductor 21
a, 21b, and 21c are twisted with respect to the three phases.
4a, 24b, 24c are stored. These bus conductors 24a, 24b, 24c
Are arranged such that the C-phase bus conductor 24c is an isosceles triangle and is located at the vertex position of the isosceles triangle.

Furthermore, the movable-side electrodes 22a, 22a
Branch conductors 26a, 26b, 26c extending to the 2b, 22c side and fixed to fixed ends 25a, 25b, 25c facing the movable electrodes 22a, 22b, 2c at the ends.
Connect.

Further, the fixed-side electrode 25 is provided on the movable-side electrodes 22a, 22b, 22c side.
Contacts 27a, 27 that open and close contacts by contacting and separating with a, 25b, 25c
b and 27c are arranged. These contacts 27a, 27b, 27c
The 20 conductors 21a, 21b, 21c are opened and closed by an operating device 28 provided at the end.

The conductors 21a, 21b, 21c are supported by insulating spacers 29, 29 that seal the openings provided on the side surface of the container 20. Similarly, the bus conductors 24a, 24b, 24c are supported by insulating spacers 30, 30, which seal openings provided on the side surfaces of the container 20.

In this embodiment, the A-phase branch conductor 23a is arranged at the apex of an isosceles triangle, and the C-phase bus conductor 24c is arranged at the apex of an isosceles triangle. As a result, the branch conductors 26a and 26c can have a linear structure. Moreover, the branch conductor 26b need only be slightly curved.

As described above, the branch conductors 26a, 26b, 26c have a simple structure, which is extremely advantageous in manufacturing.

Moreover, the branch conductors 26a, 26b, 26c are connected to the bus conductors 24a, 24b, 2
Since there is no need to pass between 4c, the branch conductors 26a, 26b, 26
Reduce the length of c to the center of the main bus 19 and the fixed-side electrodes 25a, 25b, 2
The distance L ₂ to reduce and even branch conductor 26a to 5c, 26b, 26c and the bus conductor 24a, 24b, phase insulation distance between 24c can be sufficiently secured. Therefore, it is possible to provide the small container 20 and, consequently, the small line-side disconnector 18. Further, by incorporating the line-side disconnector 18 into a gas-insulated switchgear, the size of the gas-insulated switchgear can be reduced.

〔The invention's effect〕

As described above, in the present invention, only the phase arrangement of the second conductor is different from the phase arrangement of the other conductors.
There is no need to insert the second branch conductor between the second conductors, and the length of the second branch conductor can be shortened, so that a small three-phase batch disconnector can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a three-phase collective disconnector showing one embodiment of the present invention, and FIG. 2 is a sectional view of the three-phase collective disconnector shown in FIG.
3 and 4 are a single-line connection diagram and a side view of a general gas-insulated switchgear, respectively. FIG. 5 is a cross-sectional view of a conventional three-phase switchgear, and FIGS. 7 is a sectional view taken along the line VI-VI and VII-V of the three-phase collective disconnector shown in FIG. 5, respectively.
FIG. 2 is a sectional view taken along the arrow II. 9 circuit breaker, 2 current transformer, 3 line disconnector, 4 cable head, 18 busbar disconnector, 19 main bus, 20 container, 21a, 21b, 21c ... conductor, 21a, 22b, 22c ... movable electrode, 23a, 23b, 23c ... branch conductor, 24a, 24b, 24c ... bus conductor, 25a, 25b, 25c ... fixed electrode, 26a, 26b , 26c ... branch conductor, 27a, 27b, 27c ... contact, 28 ... operating device, 29, 30 ... insulating spacer.

Claims (1)

(57) [Claims] 1. A three-phase first conductor which is housed on one side of a container in which an insulating gas is sealed and which is arranged in an isosceles triangular shape at right angles to the container axis, and which is housed on the other side of the container. Three-phase second conductors which are orthogonal to the axis and are twisted with respect to the first conductor and are respectively arranged in an isosceles triangle shape;
A three-phase first branch conductor which is connected to the first conductor, extends parallel to the container axis, and has a movable-side electrode fixed to an end of the second conductor, and is arranged in an isosceles triangular shape; A second branch conductor that is connected to a second conductor and has a fixed-side electrode fixed to the first conductor-side end opposite to the movable-side electrode, and a movable-side electrode disposed on the movable-side electrode side; A first contact, a second conductor, and a first branch arranged in an isosceles triangular shape, each of the first and second branches being provided with a contact that opens and closes with an operating device provided outside the container between the fixed electrodes. The second of conductors
A three-phase batch disconnector in which the phase arrangement of the conductor is different from that of the other conductors.