JPH03183306A - Gas insulating switch gear - Google Patents

Abstract

PURPOSE:To manufacture a small-sized gas insulating switch gear by unifying a first disconnecting tank, branch tank, cable tank and a second disconnecting tank into a single cable tank. CONSTITUTION:Disconnecting switches 19, 20 and a power feed cable head 19 are housed in a single cable tank 25. As a result, first and second units 1, 2 are constituted respectively of three tanks, and a gas insulating switch gear is constituted of seven tanks in total. That is, a power receiving tank 4, breaking tank 5, first disconnecting tank, branch tank and the cable tank are used for another purpose except that for the gas insulating switch gear. Conventionally, these tanks are used for the gas insulating switch gear and only the second disconnecting tank is additionally manufactured. According to the invention, these tanks are unified in a single tank.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a gas insulated switchgear in which a plurality of tanks constituting the gas insulated switchgear and components inside the tanks are improved.

B0 Summary of the Invention The present invention provides a gas-insulated switchgear configured by connecting a pair of first and second units, which are separately connected to a main line and an emergency auxiliary line in a power supply bus, to an intermediate unit. By replacing several tanks used for other purposes as tanks forming part of the 9th second unit with tanks of a new configuration, the 1st and 2nd units were constructed. This aims to reduce the total number of tanks used to reduce the size of the gas insulated switchgear and reduce costs.

C1 A wiring diagram of a conventional gas insulated switchgear is shown in FIG. Although the figure shows the connection for a single wire, in reality three phases are provided. On the other hand, the configuration diagram of the gas insulated switchgear is shown in Fig. 4(a).
Shown in (b).

As shown in the figure, the gas insulated switchgear is constructed by connecting a first unit 1 and a second unit 2 to an intermediate unit 3.

One of the first unit 1 and the second unit 2 is for the main line, and the other is for the auxiliary line used in the event of a power outage or the like.

The first unit 1 and the second unit 2 are symmetrical to each other,
Both are power receiving tanks 4. Cutoff tank 5°, first cutoff tank 61, branch tank 7, cable tank 8. It is composed of a second disconnection tank 9.

The power receiving tank 4 includes a main circuit conductor IO and a main circuit conductor 10.
A power receiving cable head 11 connected to one end and connected to a main bus for a main line (not shown), and a main circuit conductor I
a disconnector 12 connected to the other end ff1l of O, and a lightning arrester 13 connected midway along the main circuit conductor 10. A grounding device 14 is housed therein. Inside the disconnection tank 5 are main circuit conductors 10, a circuit breaker I5 interposed between the main circuit conductors 10, and a grounding device 16.1 connected to each main circuit conductor IO.
7 is accommodated. A disconnector 18 is provided in the first disconnection tank 6.
The main circuit conductor 10 connected to the disconnector 18 is accommodated. The branch tank 7 accommodates a T-shaped main circuit conductor 10.10.

The main circuit conductor 10 and the power transmission cable head I9 are accommodated in the cable tank s. Inside the second disconnection tank 9,
A main circuit conductor 10 and a disconnector 20 are accommodated.

The intermediate unit 3 is constituted by a cable tank 23 that houses a power transmission cable head 22 and a grounding device 21 connected to the intermediate portion of the main circuit conductor 10 and the main circuit conductor IO.

The problem that the D1 invention aims to solve is that there are a large number of tanks, which not only makes the gas insulated switchgear larger and requires a lot of installation space, but also increases manufacturing costs due to the large number of tanks.

Therefore, an object of the present invention is to provide a gas insulated switchgear that solves the above problem.

82 Means for Solving the Problems The configuration of the present invention for achieving the above object consists of a pair of first and second units connected individually to the main line and the emergency auxiliary line in the power supply bus as an intermediate unit. The first and second units are connected to a power receiving tank that houses a power receiving cable head, a disconnector, a main circuit conductor connecting these, a lightning arrester and a grounding device connected to the main circuit conductor, and a disconnection tank that accommodates a circuit breaker provided on the main circuit conductor and a grounding device connected to the main circuit conductor on both sides of the circuit breaker, a pair of disconnectors, a main circuit conductor connecting these, and a The intermediate unit is configured by connecting the connected power transmission cable head and a cable tank that accommodates the power transmission cable head, and the intermediate unit is configured as an intermediate tank that accommodates the main circuit conductor, a grounding device connected to the main circuit conductor, and the power transmission cable head. It is characterized by

F0 action Conventional first disconnect tank 1 branch tank, cable tank,
Since the four tanks of the second disconnection tank have been unified into one cable tank, the first and second units are each made up of three tanks, and the gas insulated switchgear is made up of seven tanks including the intermediate tank. That will happen.

Therefore, the gas insulated switchgear can be made smaller and can be transported to the site without having to be separated.

G. Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. Note that this embodiment is an improvement on a part of the conventional gas insulated switchgear, so the same parts as the conventional gas insulated switchgear are given the same reference numerals, the explanation is omitted, and only the different parts will be explained.

(a) Structure of Embodiment A gas insulated switchgear according to the present invention will be explained based on the wiring diagram in FIG. 1 and the configuration diagrams in FIGS. 2(a) and 2(b).

In the present invention, the disconnector 18.20 and the power transmission cable head 1
Both cables are accommodated in one cable tank 25. In other words, the conventional first disconnect tank 6° branch tank 7, cable tank 8. The four tanks of the second disconnection tank 9 are connected to one tank.

As a result, the first unit 1. Each of the second units 2 will be composed of three tanks, and the entire gas insulated switchgear will be composed of a total of seven tanks.

The reason why we were able to reduce the number of tanks in this way is due to the following Rizan. Power receiving tank 4 shown in Figure 3. Shutoff tank 5. The first disconnect tank 61, branch tank 7, and cable tank 8 are used for purposes other than gas-insulated switchgear, and conventionally these tanks were used as they are for gas-insulated switchgear, and only the second new-route tank 9 was used. I was making more. Although this method of use has the advantage that only the second disconnection tank 9 needs to be made, it has the disadvantage that the gas insulated switchgear becomes larger. Therefore, in the present invention, these tanks are unified into one tank.

(b) Operation of the embodiment Next, the operation of the gas insulated switchgear will be explained based on FIG. 2.

As can be seen by comparing Figure 2 (a), (b) with Figure 4 (a), (b), the number of tanks is six fewer than in the past, so gas insulated switchgear It becomes considerably smaller. Therefore, less installation space is required. Furthermore, since it is smaller, the gas insulated switchgear can be transported to the site without being separated.

11 Effects of the Invention As can be seen from the explanation in section 2, the gas insulated switchgear according to the present invention has the following effects.

In each of the first and second units, four tanks, excluding the power receiving tank and the cutoff tank, are integrated into one, so the number of tanks in the gas insulated switchgear as a whole is six fewer than in the past. As a result, the gas-insulated switchgear is more compact and can be transported all at once without having to be separated as in the past, and requires less installation space. In addition, manufacturing costs are low due to the small number of tanks.

[Brief explanation of drawings]

1 to 2 relate to an embodiment of the gas insulated switchgear according to the present invention, in which FIG. 1 is a wiring diagram, FIG. 2(a) is a plan view, FIG. 2(b) is a front view, and FIG. 4 to 4 relate to a conventional gas insulated switchgear, in which FIG. 3 is a wiring diagram, FIG. 4(a) is a plan view, and FIG. 4(b) is a front view. l...First unit, 2...First unit, 3...Intermediate unit, 4...Power receiving tank, 5...Shutoff tank, IO...Main circuit conductor, 11...Power receiving cable head , +2.18
．． 20... Disconnector, 13... Lightning arrester, 14. +6.
17.21... Earthing device, 15... Circuit breaker, 19.
21...Power transmission cable head, 23...Intermediate tank, 25.Cable tank. Fig. 1 Wiring diagram of gas insulated switchgear (present invention) 1 Cabinet unit 2 Second unit 3 Intermediate unit 4 Power receiving tank 5 - Cutoff tack 10 Main circuit conductor 11 Power receiving cable head 2, +8.20 Disconnector 3 - jlIll 16.17.21 Earthing device 5 Circuit breaker 9 Transparent cable head 23 Intermediate tank 25 Cable tank gas insulated switchgear (present invention) (a) Plan view (b) Front view Figure 3 Connection diagram of gas insulated switchgear (Conventional) J l Figure 4 Gas-insulated switchgear (Conventional) (a) Plan view (b) Front view

Claims (1)

[Claims] (1) A pair of first and second units, which are individually connected to the main line and emergency auxiliary line in the power supply bus, are connected to the intermediate unit, and the first and second units are connected to the power receiving cable head and the disconnector. The main circuit conductor that connects these, the power receiving tank that houses the lightning arrester and the grounding device connected to the main circuit conductor, the main circuit conductor, the circuit breaker provided on the main circuit conductor, and the main circuit conductor on both sides of the circuit breaker, respectively. A disconnection tank that accommodates a connected grounding device, a cable tank that accommodates a pair of disconnectors, a main circuit conductor that connects them, and a power transmission cable head that is connected to the main circuit conductor, are connected to each other. A gas insulated switchgear characterized in that the intermediate unit is constituted by an intermediate tank that accommodates a main circuit conductor, a grounding device connected to the main circuit conductor, and a power transmission cable head.