JPS582084Y2 - switchgear - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a switchgear such as a gas insulated switchgear of a double busbar one breaker type, for example.

Gas insulated switchgear has been used in Japan since 1963,
Since it is widely used today, a general explanation will be omitted.

1 and 2 show the most common conventional gas insulated switchgear.

In the gas insulated switchgear shown in FIGS. 1 and 2, the disconnector 12 is connected to the breaker 1 via the disconnector 13 and the connection part 14, which is closer to the breaker 1, as shown in the figure. If the disconnector 13, which is closer to the circuit breaker 1, breaks down and needs to be removed and repaired, the disconnector 12 must also be removed, making the removal process complicated.

Furthermore, while the disconnector 13 has two flanges 13a and 13b through which the conductive part A passes, the disconnector 12 has only one flange 12a, so two types of disconnectors are required. There were drawbacks.

Of course, only the disconnector 13 can be made and the same disconnector 13 can be applied to the disconnector 12, but as is well known, the flange 13a.

13b cannot be made too small due to the required ratio of insulation distance, and considering machining of the flange surface, waste of material, etc., it is usually 2.
We manufacture various types of disconnectors.

3 and 4 show a conventional gas insulated switchgear which has improved the drawbacks of the conventional gas insulated switchgear shown in FIGS. 1 and 2.

In the gas insulated switchgear shown in FIGS. 3 and 4, the disconnectors 15 and 16 are each independently attached to the T-shaped connection part 17, so in the unlikely event that the disconnector 15 or 16 breaks down. , only one of the faulty disconnectors 15,16 can be removed.

However, in such a structure, the disconnectors 15 and 16 are attached to both ends of the connection part 17 as shown in the figure, so compared to the gas insulated switchgear shown in FIGS. There was a drawback that the distance to the phase could not be made small.

In other words, since the breaker 1 generally has a larger diameter than the breaker 15 and 16 and requires periodic inspection, it is no exaggeration to say that the gap between adjacent ones is determined by the size of the breaker 1. Such an arrangement requires a distance greater than the phase-to-phase distance required for the circuit breaker 1, which impedes the advantage of the gas-insulated switchgear, which has the greatest advantage of downsizing.

Further, in such a structure, the disconnectors 15 and 16 are plane symmetrical, but it goes without saying that two types of disconnectors are required even if they are plane symmetrical.

This invention was devised in view of these points, and the purpose is to provide a switchgear that does not have the above-mentioned drawbacks by providing each disconnector on the same side with respect to the connection part. be.

Hereinafter, a gas insulated switchgear as an example of this invention shown in FIGS. 5 to 7 will be described.

In FIGS. 5 to 7, reference numeral 1 denotes a circuit breaker, which is connected via a disconnector 2 to a connecting portion 4 provided with a bushing 3.

5 and 6 are disconnectors connected to each bus bar 7 and 8, and the conductive part A
outlets are provided at the sides and ends.

Reference numeral 9 denotes a connection part that commonly connects each of the disconnectors 5 and 6 to the breaker 1. Each of the disconnectors 5 and 6 is connected by a flange 10 on the same side to the connection part 9, and the breaker 1 are connected by a flange 11 on the opposite side of the disconnector 5.6.

In addition, the above-mentioned breaker 1, disconnector 2, 5.6, connection part 4,
9 and the busbars 7 and 8, the conductive part A thereof is housed in a metal container B, and the metal container B and the conductive part A are insulated by an insulating gas sealed in the metal container B.

Furthermore, the metal containers B are integrally connected to each other.

In this way, the gas insulated switchgear of this invention.

Since the disconnectors 5 and 6 are each provided on the same side of the connection part 9, if one of the disconnectors 5 and 6 breaks down, repair work can be carried out without affecting the other. Furthermore, disconnectors 5 and 6 having exactly the same shape can be used.

Also, Figure 3. Compared to the conventional gas insulated switchgear shown in FIG. 4, the distance between the disconnectors 5 and 6 can be made smaller.
The distance in the interphase direction can also be reduced to the same extent as the dimension determined by the installation and inspection of the breaker 1, and the device can be downsized.

In the above description, the conductive part A is bent into an L-shape inside the disconnectors 5 and 6, and the outlet of the conductive part A is provided at the side and end of each disconnector 5 and 6, for example, the bus bar 7, The explanation has been made using disconnectors 5 and 6 that can be dismantled and inspected without moving adjacent equipment such as disconnectors 5 and 8.
By bending the conductive part in a 3- or U-shape inside the 6 and placing the outlet of the conductive part in a position that is not on the same straight line, it can be applied to a disconnector that can be removed without removing adjacent equipment. has the same effect.

FIGS. 8 to 10 show other practical examples of gas-insulated switchgear of this invention.

The gas insulated switchgear of this other example is characterized in that the circuit breaker 1 is provided at the end of the connection portion 9.

Although the above explanations are all about phase-separated type examples, the same effect can be obtained even when applied to a three-phase integrated type gas-insulated switchgear in which conductive parts for three phases are housed in one metal container. play.

As described above, according to the switchgear of this invention, since each disconnector is provided on the same side with respect to the connection part,
Each disconnector can be removed without removing the other disconnectors.

Moreover, each disconnector can be formed in the same shape.

Furthermore, it is possible to provide each disconnector in close proximity to each other, resulting in effects such as miniaturization.

[Brief explanation of the drawing]

1 and 2 are side views showing a conventional gas insulated switchgear, FIGS. 3 and 4 show a conventional gas insulated switchgear, and FIG. 3 is a plan view thereof, and FIG. 4 is a side view showing a conventional gas insulated switchgear. A side view thereof is shown. 5 to 7 show a gas insulated switchgear as an example of this invention, FIG. 5 is a plan view thereof, FIG. 6 is a side view thereof, and FIG. 7 is a line -■ in FIG. 6. FIG. 8 to 10 show gas insulated switchgear of other practical examples of this invention, FIG. 8 is a plan view thereof, FIG. 9 is a side view thereof, and FIG. 10 is an X-- It is a cross-sectional view in an X-ray. In the figure, 1 is a breaker, 2562 is a disconnector, 7 and 8 are busbars, 9 is a connection part, A is a conductor, and B is a metal container. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A plurality of disconnectors connected to each of the plurality of busbars are connected through a common connection part, and the conductive parts of the respective components are housed in a container sealed with an insulating medium, and the containers are connected. A switchgear characterized in that each of the disconnectors is provided on the same side with respect to the connection portion.