JPH0471306A - Gas insulation switchgear - 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 gas-insulated switchgear in which a live part is insulated by an insulating gas, and particularly to a gas-insulated switchgear for multiple lines.

[Conventional technology]

FIG. 3 is a plan view of a conventional gas insulated switchgear, and FIG. 4 is a single line diagram thereof, showing the case where it has two lines A and B. 5 and 6 are side views showing the line A and line B portions of the gas insulated switchgear shown in FIG. 3, respectively.

In these figures, (1) shows two main busbars, each of which houses conductors for three phases (not shown), and is filled with sulfur hexafluoride (SF6) gas as an insulating gas. (2) is an overhead lead-in bushing for 3-phase, 2-line circuits, which is arranged in a straight line parallel to the busbar (1), and so as to maintain the required insulation distance between the bushings according to the circuit voltage. , a power transmission line (not shown) is connected to each of them. (3) is a circuit breaker installed for each line between the main bus (1) and the overhead lead-in bushing (2), and the line A circuit breaker (3A) installed in line A and the circuit breaker installed in line B. It consists of a line B circuit breaker (3B). (
4) is a connecting bus that connects the overhead lead-in bushing (21) and the circuit breaker (3), and (5) is a connecting bus that connects the main bus (1) and the circuit breaker for circuit A (3A). Circuit breaker (3
) are arranged so that their longitudinal directions are perpendicular to the main bus bar (1), and the connecting bus bar (4
) and the connecting busbar (5) are provided in an appropriate shape and length. (6) is a current transformer provided in the circuit breaker (3).

The term breaker (3) includes the current transformer (6), and the term "longitudinal direction" refers to the direction in which the dimensions are longer when viewed from above (the same applies hereinafter). Furthermore, in addition to the above, a disconnector (such as a sword) is provided.

In the gas insulated switchgear constructed as described above, the required vertical dimension in Fig. 1, that is, the required dimension from the main bus bar (1) to the overhead lead-in bushing (2), is the same as the circuit breaker ( 3) is determined by the longitudinal dimension and the dimension required for bending the connecting bus (4) and connecting bus ((5). In the case as shown in Figure 1, Ll is determined on the line A side, and on line B. To accommodate this, a long connecting busbar (4-) is provided.

Similarly, the required dimension L2 in the lateral direction is determined depending on the insulation distance between the aerial retractable bushings (2).

In addition, the main bus (1) has been downsized due to recent technological advances, but in that case, the main bus (1) will be reduced toward the left in Figure 1, and the connection of line A will be reduced accordingly. Bus line (
5) etc. are extended towards the left. Therefore, the area required for installation remains almost the same (a problem to be solved by the invention). Conventional gas insulated switchgears are configured as shown below. The size is large, and therefore the area required for installation is large. Further, even if the main bus bar is downsized, there is a problem that it hardly contributes to reducing the required area.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a gas-insulated switchgear that requires a small installation area.

[Means to solve the problem]

In the gas insulated switchgear according to the present invention, the circuit breaker for one line is arranged so that its longitudinal direction is perpendicular to the main bus, and the circuit breakers for other lines are arranged so that their longitudinal direction is perpendicular to the main bus. It is arranged so that it is parallel to the plane.

[Effect]

3) In the gas insulated switchgear according to the present invention, the circuit breaker for one line and the circuit breaker for the other line are arranged perpendicularly and substantially parallel to the main busbar, so that space is saved. It can be used effectively, and the required dimension from the main bus bar to the overhead lead-in bushing is reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a plan view of a gas insulated switchgear according to an embodiment of the present invention, and shows a case where the gas insulated switchgear has two lines A and B like the conventional example. Figure 2 shows the concave line A of the gas insulated switchgear in Figure 1.
FIG. In the figure, (1) to (7
) are the same as those in the conventional example, so their explanation will be omitted. The main busbar (1) is smaller than that of the conventional example, and is reduced toward the left in FIG. The circuit breaker for circuit B (3B) is arranged so that its longitudinal direction is perpendicular to the main bus (1), while the circuit breaker for circuit A (3Δ) is arranged so that its longitudinal direction is parallel to the main bus (1). It is arranged so that Therefore, the length required for the bending of the communication bus (5) and the circuit breaker (3A) for circuit A in the vertical direction in FIG. 1, that is, the dimension in the direction perpendicular to the bus (1), becomes smaller. As a result, the required dimension in the direction ``1'' for the entire circuit is determined by the circuit B side. By reducing the dimension in the above direction by making the connection bus bar (4) on the circuit B side the minimum length necessary for bending, and by fitting the circuit breaker for Fla A (3A) etc. in the space within that dimension. ,
L8 can be made small. In addition, in FIG. 1, the required dimensions in the lateral direction are almost the same as in the conventional example.

〔Effect of the invention〕

As described above, according to the present invention, the circuit breakers for one line and for the other line are arranged perpendicularly or parallel to the main bus, so that space can be effectively saved. This has the effect of reducing the required dimension from the clay figure wire to the overhead lead-in bushing, and thus reducing the required installation area.

[Brief explanation of drawings]

Fig. 1 is a plan view of a gas insulated switchgear according to an embodiment of the present invention, Fig. 2 is a side view showing the line A portion of the gas insulated switchgear of Fig. 1, and Fig. 3 is a conventional gas insulated switchgear. A plan view of the switchgear, FIG. 4 is a single line diagram thereof, and FIGS. 5 and 6 are line A and line B of the gas-insulated switchgear in FIG. 3, respectively.
FIG. In the figure, (]) is the main busbar, (2 is the overhead lead-in bushing, (3) is the circuit breaker, (3A) is the circuit breaker for HiliA,
(3B) is a line B circuit breaker. It should be noted that the arrows in the middle of each figure indicate the same or corresponding parts. Agent Patent Attorney Oiwa
Masuo Figure 4

Claims (1)

[Claims] A main bus bar, an overhead lead-in bushing into which multiple lines of power transmission lines are drawn, and a circuit breaker provided for each line between the main bus bar and the overhead lead-in bushing, in which the above-mentioned circuit breaker for one line and the other The above circuit breaker for the line of
A gas insulated switchgear characterized in that the planar longitudinal directions thereof are arranged so as to be substantially perpendicular and substantially parallel to the main bus bar, respectively.