JPS6181109A - Seitchgear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial use minute hand] This invention is a switching device using a 1)/2 breaker system.

In particular, it concerns the arrangement of circuit breakers and disconnectors.

(Prior Art) Fig. 3 shows a circuit diagram of a switching device using a 1)/2 L/ or disconnection system. Lines from power lines and transformers (2) 7 (
4) is the main circuit a at the power line terminal (6) and transformer terminal (8)
Connected to 0. The main circuit αQ has first, second, and third circuit breakers (2) 1) 4, α arranged between the first main bus (5) and the second main bus (6). Become. On both sides of the breaker A, En, and αQ, there are Shinji Kihocho (2) 1 (goods), (to),
(to) is provided. The first main bus (5) and the disconnector (to) are connected by the first connection line (I).

The second main bus (7) and the disconnector ■ are connected to the second connection line (13)
Connected with This 1r/2 breaker system is bus bar (5)
Even if one of the 10,000 busbars stops due to an accident or inspection, it is possible to switch to another busbar. For example, in the event of a failure in a power transmission line, it would be possible to instantly open circuit breakers and isolate the faulty circuit without causing a power outage.

FIG. 4 shows a plan view of the equipment arrangement of a conventional switchgear based on this method. FIG. 5 is a side view thereof.

Overhead wires (6) from the first busbar (6a) and the second busbar (7a).

4 are respectively connected to the bushing (1) layer. Also.

Overhead lines from power transmission lines and transformers +21. (The 4th one is connected to bushing (2) and (goods) respectively. Breaker (
wealth), 1) 41. (16 is.

They are arranged in series as shown in the figure. (Ll) in the figure
The parts (L7), (1) 1), and CI2) are the exposed parts of the overhead wire, so they need to be longer than the insulation distance required in the air.

Problems to be Solved by the Invention In the configuration of the conventional device as described above, the distance required for insulation must be considered (i.e., the terminals (2), (61, (8)
1.

(A) etc.) are arranged in series. Therefore, the dimension (L) required for installing the switchgear cannot be less than the total value of the insulation distances (Ll) to (L7) of the exposed portion.

The object of the present invention is to solve this problem and reduce the size of the opening/closing device.

(Means for Solving the Problems) In the present invention, a main bus grounding container filled with insulating gas is provided at approximately the same height as the breaker, and the three-phase main bus is housed in the container all at once. Furthermore, the connection line was housed in a connection line grounding container that was provided to protrude from the main busbar grounding container.

In addition, the first l! The second and third circuit breakers were arranged with their long sides parallel to each other.

[Effect]

Since the connecting wire is housed in a grounded container without being exposed to the air, the distance between the connecting wire and other lines can be made smaller than before.

For this reason, it has become possible to arrange the circuit breakers in parallel with each other. In addition, by arranging the circuit breakers in parallel, the length in the long side direction occupied by the circuit breakers is 1
The length can be reduced to approximately the length occupied by two circuit breakers.

〔Example〕

An embodiment of the opening/closing device according to the present invention is shown in FIGS. 1 and 2. FIG. The 1st and 2nd main busbars are SF for each of the three phases.
It is housed in the first and second main busbar grounded container ships filled with insulating gas such as a. A first connection line grounding container housing a connection line (6) is protruded from the first main bus line grounding container ship and extends to the first disconnector (G). Similarly, a second connection line grounding container (to) protrudes from the second main busbar grounding container. Main bus grounding container M
, the fourth one is provided at almost the same height as the first and second Shinroki (To) and @.

The circuit breakers (2), a and 〇〇 are arranged in parallel, and the circuit breakers (to) (4) and e! J (goods), (to) (to) are placed. That is, each device is arranged in an S-shape.

A bushing (to) 04 having a sufficient height is provided above the disconnector (1), CI4, and is connected to the power transmission line/transformer.

What is exposed inside 2 is the overhead wire +21. (4) only.

Therefore, the distances (dl), (I2), (I8
) should be greater than the insulation distance in the air. Note that the distance (dl) may be the same length as the distance (al) of the conventional device shown in FIG.

A circuit diagram of this device is shown in FIG. Bus line (51, (7)
Even if one of the 10,000 buses stops due to an accident or inspection, it is possible to switch to another bus. For example, if a failure occurs in the power transmission line, breaker Q3. Be able to instantly open the Hibiki circuit and isolate the faulty circuit without causing a power outage.

(Effects of the Invention) According to this invention, the dimension (V) between the busbars required for installing the switchgear can be reduced, and the installation area can be greatly reduced.Furthermore, the steel structure supporting the aerial busbar can be It can be simplified.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing one embodiment of a switchgear according to the present invention, Figure 3 is a circuit diagram of a switchgear using a 1)/2 L/ or disconnection system, and Figures 4 and 5 are It is a diagram showing a conventional opening/closing device. (5) is the first main bus, (7) is the second main bus, Q2 is the first breaker, σ◆ is the second breaker, ni) is the third breaker, and the ship is the first , (6) is the second main bus grounding container, and ■ is the first connection line grounding container. - is the second connection line grounding container. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A first main bus consisting of three phases, a first connection line connecting the first main bus and the first disconnector, a second main bus consisting of three phases, a second main bus and a first connection line connecting the first main bus and the first disconnector. a second connection line connecting two disconnectors, a first disconnector electrically connected in series between the first disconnector and the second disconnector, a third and fourth disconnector; A disconnector, a second disconnector, a fifth and sixth disconnector, and a third disconnector. In a switchgear using a 1 (1/2) bow disconnection system, the first, second, and third bow disconnectors are arranged in parallel with each other in the long side direction, and the first and second main The first and second main bus grounding containers, which collectively house multiple phases of the bus and are filled with insulating gas, are connected to the first
・A first line that is located at substantially the same height as the second and third line disconnectors, with the first and second connection wires protruding from the first and second main bus grounding containers. - A switchgear characterized in that the second connection line is housed in a grounding container. (2) A first disconnect switch, a first disconnect switch, and a third disconnect switch arranged from the first main bus bar to the second main bus bar, and from the third disconnect switch to the first main bus bar a fourth disconnector disposed in a direction substantially parallel to the busbar; a second disconnector disposed toward the first main busbar from the fourth disconnector;
a Noshiya disconnector and a fifth disconnector; a sixth disconnector disposed from the fifth disconnector in a direction substantially parallel to the first main bus; a sixth disconnector to the second main bus; The third one placed towards
The switchgear according to claim 1, comprising: a disconnector and a second disconnector.