KR940004702Y1 - Gas-insulated switchgear - Google Patents

Abstract

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Description

Gas Insulated Switchgear

1 is a front view showing a partial cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention.

2 is a plan view of the gas insulated switchgear shown in FIG.

3 is a front view showing a partial cross section of a conventional gas insulated switchgear.

4 is a plan view of the gas insulated switchgear shown in FIG.

* Explanation of symbols for main parts of the drawings

1: Gas circuit breaker 1A, 2A: Circuit breaker

1B, 2B: Control panel 3: Field panel

4: pedestal 5: gas bushing

6,10,20,26: Earth breaker 6A, 10A, 20A, 23A, 26A: Earth breaker fixed contact

7,9,21,22: Current transformer 8: Phase separation bus

11,19: corrugated pipe 12,13,24,25: disconnector

14,16,43: Disconnector movable contact 15,17,44: Disconnector fixed contact

18,19 main bus 27: cable connection

28: main bus support 29-42: insulated spacer

45,46: main bus conductor 47: phase-separated bus conductor

48,49,51,52: Expansion direction of gas insulated switchgear

The present invention relates to a gas insulated switchgear used in the power system.

In a switchgear device generally used to open or close an electric circuit in a power system, a device used for blocking an excessive abnormal current such as a short circuit accident, a device for opening and closing a current equivalent to a load current flowing through a load, It is divided into a device used only for opening and closing of a converter in which a charged current does not flow. GAS INSULATED SWITCHEAR, which can cut off excessive current as well as open / close load current in case of an accident, has already connected related equipment such as bus, disconnector and instrument transformer in high voltage substation with sulfur fluoride gas insulation. 6 Install in consideration of the installation area in combination with sulfur fluoride gas circuit breaker.

The conventional method of arranging a gas insulated switchgear in a substation is installed next to the field panel 3, as shown in FIG. 3, and is provided with the blocking portions 1A, 2A and the tissue portions 1B, 2B on the pedestal 4. The three-phase gas circuit breaker (1, 2) consisting of) is disposed in parallel to the horizontal plane and the three-phase collective main buses (18, 19) in a direction orthogonal to the gas circuit breakers (1,2) in parallel with the horizontal plane. We arrange and occupy relatively large installation area. The gas bushing 5 or the cable connection unit 27 may receive or transmit electricity, and the main unit 18 or the other main bus 19 may be connected to each unit of the conventional gas insulation switchgear for transmitting or receiving the gas. And the main bus conductor 45 or the other main bus conductor 46 are energized.

A phase separation bus 8 is provided between the gas bushing 5 and the cable connection part 27, and respective phase separation bus conductors 47 are provided inside each member.

Then, the disconnectors 13 and 25 are installed, the disconnecting movable contact point 14 and the disconnecting device fixed contact point 15 are installed, and the grounding switch 20, 23, and 26 are installed, respectively, and the grounding switch fixed contact points 20A, 23A, 26A), current transformers 21 and 22, corrugated pipes 19, and main busbar support insulators 28 are provided, respectively.

Here, reference numerals 29, 37, 38, 40, and 42 denote insulating spacers.

Accordingly, the main buses 18 and 19 are composed of three-phase main bus conductors 45 and 46 and a main bus support insulator 28 which supports and insulates the main buses. The buses 18 and 19 may be energized and operated simultaneously with each case. Therefore, the main buses 18 and 19 can be energized by the main buses 18 and 19 respectively by opening and closing the disconnector 13 connected to the phase-separated bus conductor 47, or can be energized simultaneously.

4 is a plan view of the gas insulated switchgear shown in FIG. 3, in which a conventional gas insulated switchgear has two units assembled, and the three-phase main buses 18 and 19 are connected to each other. When installing multiple units of gas insulated switchgear in the substation, they are installed in the 48 or 49 direction, so that the transverse length is constant and the longitudinal length is long so that the gas insulated switchgear will be installed. As only the length of the building was lengthened, it was difficult to secure the substation site in an expensive site and was unreasonable in terms of site use.

Therefore, the present invention has been devised to solve the above-mentioned drawbacks, and as in the prior art, the gas circuit breakers are arranged side by side without being placed side by side with the horizontal plane vertically. It is an object of the present invention to provide a gas insulated switchgear which can effectively install a switchgear, which can save material costs and advantageously use a large area of the forward type.

In order to achieve the above object, the gas insulated switchgear according to the present invention includes a three-phase gas circuit breaker (1,2) arranged side by side in the same horizontal plane and connected to one end of each gas circuit breaker (1,2). In addition, the three-phase batch main busbars 18 and 19 are parallel to the horizontal plane and two main busbars 18 and 19 are arranged up and down in a direction orthogonal to the gas circuit breakers 1 and 2. Each of the gas circuit breakers 1 and 2 is connected to the left and right around the bus lines 18 and 19.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a partial short side of a gas insulated switchgear according to an embodiment of the present invention, in which three phases of gas circuit breakers 1 and 2 are arranged side by side in a horizontal plane, and the gas circuit breakers 1 and 2 are arranged side by side. It is installed next to the field panel (3) and is installed on the base (4) is composed of the blocking unit (1A, 2A) and the operating unit (1B, 2B).

The main bus line 18 and the other main bus line 19 are disposed up and down in parallel with the horizontal plane in a direction orthogonal to the gas circuit breakers 1 and 2, and a three-phase main bus conductor in the main bus lines 18 and 19. (45,46) and the main bus bar support insulator 28 which supports and insulates it.

Therefore, the energization of the upper and lower main buses 18 and 19 is energized and non-energized by opening and closing the disconnectors 12 and 13 on the left and right connected to the phase separation bus conductor 47.

Therefore, the gas insulated switchgear of the present invention is a conventional gas insulated switchgear shown in FIG. 4 by placing the upper and lower main buses 18 and 19 between the gas breaker 1 and the other gas breaker 2. As in the case of arranging, it has the same function as arranging the disconnecting device 13 and the grounding switch 20.

The two disconnecting units 12 and 13 restart the plurality of insulating spacers 29-42 on the side of the connecting bus or adjacent disconnection periods and the three-phase collective main buses 18 and 19 to gas-compart. Thus, the two disconnectors (12, 13) Consists of a magnetic phase separation bus (8), the Main busbars 18 and 19 are arranged up and down about the shape of the phase-separated busbar 8 in the shape of a child.

As shown in FIG. 2, in the case of combining the gas insulated switchgear of two units according to the present invention, the upper and lower main buses 18 and 19 are disposed between the gas circuit breaker 1 and the other gas circuit breaker 2. By doing so, the longitudinal lengths of the main buses 18 and 19 are shortened to 1/2 of the conventional gas insulated switchgear shown in Fig. 4, and the land area can be advantageously used.

In addition, when the gas insulated switchgear of the present invention is laid out or installed more than three units, it is arranged by connecting in the 51 direction or the 52 direction as shown in FIG. While the direction length is shortened to (1/2) and the lateral length is about twice as long, it is in a forward direction than a conventional gas insulated switchgear, and the land area can be advantageously used.

Therefore, in the gas insulated switchgear according to the present invention, as shown in FIG. 2, the gas insulated switchgear is shortened in the longitudinal direction by one-half in length and approximately two times in the transverse direction. The length is shortened to 1/2, which saves material costs, and has the advantage of being installed in the substation in a forward installation area.

As described above, according to the present invention, it is possible to effectively install a large number of gas insulated switchgear in the substation site space limited by arranging the main circuit buses vertically while arranging the gas circuit breakers in parallel with the horizontal plane as in the related art. It is possible to provide a gas insulated switchgear which can advantageously use a large area of the forward type.

In addition, the present invention can be carried out in various forms without departing from the technical spirit.

Claims (5)

The three-phase gas circuit breakers 1 and 2 are arranged side by side in the same horizontal plane and connected to one end of each of the gas circuit breakers 1 and 2, and are orthogonal to the gas circuit breakers 1 and 2, respectively. The three-phase batch main busbars 18 and 19 are parallel to the horizontal plane, and the two main busbars 18 and 19 are arranged up and down, and each gas circuit breaker on the left and right centers around the main busbars 18 and 19. Gas insulated switchgear, characterized in that 1,2) is connected. 2. The gas insulated switchgear according to claim 1, wherein the length of the main buses (18, 19) is shorter than that of the conventional type of gas insulated switchgear in two units. The gas insulated switchgear according to claim 1, wherein the longitudinal length is shortened by half when the gas insulated switchgear is connected in several units. 2. The two disconnectors (12, 13) provided on the left and right sides of the main bus (18, 19) are insulated on the connecting bus or adjacent disconnection periods and the three-phase collective main bus (18, 19) side. A gas insulated switchgear characterized in that the gas compartment is restarted by restarting the spacer (34-42). The method of claim 4, wherein the disconnectors (13, 13) Composed of a magnetic phase separating bus 8 Gas insulated switchgear, characterized in that the main buses (18, 19) are arranged up and down around the magnetic phase separation bus (8).