JPS6181110A - 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 [Field of Industrial Application] The present invention relates to a switching device using the 11/2 L/ or disconnection system, and particularly to the arrangement of the circuit breaker and disconnector.

[Conventional technology]

Figure 5 shows a circuit diagram of a switchgear using the 1'/2 L/ or disconnection system. Lines from power lines and transformers (2).

(4) is connected to the main circuit aO through a power transmission line terminal (6) and a transformer terminal (8). The main circuit αq includes first, second, and third circuit breakers υα◆, (a) arranged between the first main bus (5) and the second main bus (6). Breaker U rA
There are disconnectors on both sides of 4αQ.
, (2) are provided. The first main bus (5) and the disconnector (to) are connected by the first connection line (ll), and the second main bus (7) and the disconnector (to) are connected by the second connection line (13 This 11/2 breaker system connects busbars (5) (7
) Even if one bus stops due to an accident or inspection, it is possible to switch to the other bus. For example, in the event of a failure in a power transmission line, a circuit breaker @α can be instantly opened to isolate the faulty circuit without causing a power outage.

FIG. 6 shows a plan view of the equipment arrangement of a conventional switchgear based on this method. FIG. 7 is a side view thereof.

The overhead wires (6) (to) from the first bus bar (5a) and the second bus bar (7a) are connected to the bushing 00 (7), respectively. Also,! Overhead lines (2) and (4) from the power transmission line and transformer are BU! Connected to TSING @ (to). Breaker (2) Q4α
・Ha, 1,
/ They are arranged in series as shown in Figure 1. (Ll) to (L7) and (J!1) in the figure,
Since the part (22) is the part where the overhead wire is exposed to the air, it needs to be longer than the insulation distance required in the air.

[Problem that the invention seeks to solve]

In the configuration of the conventional device as described above, parts that require consideration of the distance required for insulation (i.e., terminals (c) (61 (8) (e), etc.) are arranged in series. Therefore, the installation of the switchgear The insulation distance (L) of the exposed part
1) to (L7) cannot be less than the total value.The purpose of this invention is to solve this problem and reduce the size of the switching device.

[Means for solving problems]

In this invention, a main bus grounding container filled with insulating gas is provided directly below or directly above the first and second disconnectors, and the main bus is accommodated therein. 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, second, and third circuit breakers were arranged so that their long sides were parallel to each other.

``Function'' Since the connecting wire is not exposed to the air and is housed in the grounding container, the distance between the grounding 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
It can be reduced to a length that is approximately equal to the length occupied by two breaker devices.

〔Example〕

An embodiment of the opening/closing device according to the present invention is shown in FIGS. 1 and 2. FIG. The first and second main busbars are respectively placed in first and second main busbar grounding containers filled with insulating gas such as SF.)
). The first main busbar grounding container αO is
Grounding container (40a) for 1st phase, 2nd phase, and 3rd phase (4
0b) (40c), each of which? contains each phase of the main bus bar. Similarly, the second main bus grounding vessel (6) consists of grounding vessels (42a) (42b) (42c) for the 1st phase, 2nd phase, and a-phase, and each phase of the main busbar is connected to each phase. It is stored. These earthed containers (40a) (40b) (40c) (42a
) (42b) (42c)! Is No ν directly below the first and second disconnectors (to), that is, underground? will be installed. By burying it underground, the grounding of the grounding container becomes complete. From each grounding container, a grounding wire connection container color (color) containing connection wires (b) and (to) is protruded and extends to the disconnector (to) and (to). Breaker (
2) α4 (II) are arranged in parallel, and a disconnector (goods) (1) and C1@4.

That is, each device is arranged in an S-shape. Disconnector,
A bushing (to) ■ is installed on top of the foundation, and it is connected to the power transmission line and transformer. As a result, only the overhead wires (2) and (4) are exposed to the air. That is, underground earthed containers (40a), (40b)%40c), (42a
), (42b), and (42c) to the circuit breaker as a three-dimensional device using grounded containers (c) and (b). Therefore, the distance IJi (d 1 ) in the figure.

(d2) (da) may be greater than or equal to the insulation distance in the air.

Note that the distance (a 1) is the distance (a 1) of the conventional device shown in FIG.
! It should be the same length as 1). The circuit diagram of this device is shown in FIG. 5. Even if one bus bar (7) stops due to an accident or inspection, it is possible to switch to the other bus bar. For example, if a fault occurs in a power transmission line, a circuit breaker (
2) It is possible to instantly open α→ and isolate a faulty circuit without causing a power outage. In this embodiment, the main bus-bar grounding container 髫□□□ is buried underground, so there is no need for a steel structure to support the aerial bus.Another embodiment is shown in FIGS. 3 and 4. In this example,
The three phases of the first and second main busbars are stored together in the first and second main busbar grounding containers fD (b), respectively. It is. As a result, the length a, . . . required for installation can be reduced, and the installation area can be further reduced.

In the above embodiments, the main bus grounding containers 1 and 2 are buried underground, but in other embodiments, they may be provided directly above the first and second disconnectors.

[Effect of investigation]

According to this invention, the dimension (6) 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 bus bar can be made into a cylindrical structure.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing one embodiment of the switchgear according to the present invention, Figures 3 and 4 are diagrams showing other embodiments, and Figure 5 is a diagram showing an 11/2 L/ or disconnection system. Circuit diagram of the switchgear, according to
FIGS. 6 and 7 are diagrams showing conventional opening/closing devices. (5) is the first main bus, (7) is the second main bus, (2)
is the first breaker, α◆ is the second breaker, and α is the third breaker.
breaker, ■ is the first main bus grounding container, (b) is the second
- is the main bus line grounding container, - is the first connection line grounding container. The trout is the second connection grounding container. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (4)

[Claims] (1) First main bus: A first connection line that connects the first main bus and the first disconnect switch, a second main bus, and a second connection line that connects the second main bus and the second disconnect switch. A first breaker, a third and fourth breaker, a second breaker, a fifth breaker, and a fifth breaker electrically connected in series between the first disconnector and the second disconnector. In a switching device using a 1 (1/2) breaker system having a sixth disconnector and a third breaker, the first, second, and third circuit breakers are arranged in parallel with each other in the long side direction. A first main bus grounding container containing the first main bus bar and filled with insulating gas is placed directly below or directly above the first disconnect switch, and a second main bus bar is housed inside the container. A second main bus grounding container filled with insulating gas is placed directly below or directly above the second disconnect switch, and the first and second connection wires are made to protrude from the first and second main bus grounding containers. A switchgear characterized in that the first and second connection wires provided are housed in a grounding container. (2) The switchgear according to claim 1, wherein the first and second main busbar grounding containers collectively house three phases of the main busbar. (3) The first and second main busbar grounding containers each consist of a first-phase, second-phase, and third-phase grounding container that accommodates each phase of the main busbar. The opening/closing device according to item 1. (4) The switchgear according to any one of claims 1 to 3, wherein the first and second main busbar grounding containers are buried underground.