JPS59159605A - Gas insulated switching device - 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 The present invention relates to a gas insulated switchgear, and more particularly to a gas insulated switchgear of a double bus type l-disconnector type having a three-phase, coiled main bus.

Conventionally, the gas-insulated switchgear of the above type was generally arranged with each main bus bar parallel to the ground level, so the dimensions of the gas-insulated switchgear in the direction perpendicular to the axis of the main bus bar The disadvantage was that it was long and required a large area for substations.

This invention has been made in view of the above, and an object of the present invention is to provide a gas insulated switchgear which has a small dimension in the direction perpendicular to the axis of the main bus bar and which requires a small site area for a substation. The main busbars are arranged in the vertical direction, and the busbar selection disconnectors on the main busbar side are connected horizontally in opposite directions from each main busbar, and at least one drawer connection part of the intermediate busbar selection disconnector is connected to the main busbar side. The above object is achieved by arranging the device to be directly connected to the busbar selection disconnector on the busbar side.

The invention will now be described in detail with reference to illustrative embodiments.

FIG. 1 is a single-line connection diagram showing the electric circuit of the gas insulated switchgear of the present invention, in which the main busbars / and 2 are connected to the main busbar side busbar selection disconnectors 3. and 2, respectively. The two main bus side bus bar selection disconnect switches are both connected to the intermediate bus bar selection disconnect switch S, and the three disconnect switches constitute a /- disconnect switch system. Both ends of the intermediate busbar selection disconnector j are connected to the line lead-out portion t via a breaker 6 and a line-side disconnector 7, respectively. The area indicates an instrument current transformer. Although each circuit in Figure 1 shows a power transmission line circuit, it also includes a transformer circuit that does not have a disconnector on the line side, and a circuit that includes a lightning arrester or voltage transformer on the line side of the circuit breaker. Since it is not related to the gist of the invention, it will be omitted.

FIG. 2 shows an embodiment of the equipment arrangement of the gas-insulated switchgear of the present invention, in which the three-phase finger-shaped main busbar is located near the ground, and the lower main busbar is located at a higher position. In FIG. 1, the upper main busbars / and 2 are on almost the same vertical plane.

Main bus side bus selection disconnector 3. are connected to the opposite side of each bus bar by connecting parts pulled out horizontally from each main bus bar/2, and the main bus side bus bar selection disconnect switch 3 is directly connected to one side of the intermediate bus bar selection disconnect switch 3. The main bus side bus selection disconnect switch q is connected to the intermediate bus selection disconnect switch 1 and the breaker B via the branch bus io. The rest is the same as that in FIG. 7, so the explanation will be omitted. Note that Figure 2 shows the connection to an electric cable, but in the case of an overhead line connection, it is an aerial bushing tonal.

In the embodiment shown in FIG. 3, the disconnector DA is pulled out horizontally from the main bus in the opposite direction to the disconnector 3 and connected, and the intermediate busbar selection disconnector j (!: indicates the other directly connected to the drawer connection.

The main busbars / and 2 are not located on the same vertical plane but on parallel vertical planes spaced apart from each other. For other parts, the second
Since the figure and FIG. 3 are exactly the same, the explanation will be omitted.

FIG. Each member of fine polarization and fixed polarization is insulated spacer/l on the main bus bar side.
and an insulating spacer saw on the intermediate bus selection disconnect switch side, and each insulating spacer also serves as a gas compartment between the main bus side bus selection disconnect switch and the intermediate bus selection disconnect switch. Each member on the movable side and the fixed side constituting the intermediate bus bar selection disconnector 3 is provided with an insulating spacer/7. /4I
Supported by One side of the disconnector 3 and the disconnector j are electrically connected by a contact configured on one side of the disconnector 3 via an insulating spacer saw.

According to this invention, as is clear from FIGS. 2 and 3, two
The dimensions of the gas-insulated switchgear in the direction across the main busbar of the circuit breaker B, that is, the dimension of the gas-insulated switchgear in the direction perpendicular to the main busbar, are significantly reduced, which has the effect of eliminating the need for a large site for substations, etc. There is. Also, as is clear from Fig. 9, the container of the main bus side bus selection disconnect switch and the container of the intermediate bus selection disconnect switch are directly connected via an insulating spacer, and at the same time, this insulating spacer Since the gas insulated switchgear is configured to be partitioned into gas compartments, the size of the gas insulated switchgear can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a single line connection diagram showing an electric circuit of a gas insulated switchgear according to the present invention, Fig. 2 is a front view showing one embodiment of the arrangement of equipment of the gas insulated switchgear according to the invention, and Fig. 3 is a diagram showing another A front view similar to the first figure showing the embodiment, and the second figure is the same as the first figure and the third figure.
FIG. 3 is a partial cross-sectional view schematically showing a connecting portion of the disconnector of the embodiment shown in the figure. l, co...Three-phase-talking main bus, 3. Da... Main bus side bus selection disconnector!・・Intermediate busbar selection disconnector, rule book breaker, 7.・Line side disconnector, ・・Measurement current transformer,
ri...Line lead-out section, 10...Branch busbar, /l, /ko,
i, y, i goo insulation spacer. Note 1. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (3)

[Claims] (1) The l-i disconnector system is a double bus type and consists of three disconnectors for bus selection of adjacent co-circuits, and is a three-phase finger-shaped two main busbar type. A gas-insulated switchgear in which one of the two is installed near the ground and the other is placed at a higher position than the other, and the busbar selection disconnector on the main busbar side is pulled out horizontally from each main busbar and on the opposite side of the main busbar. A gas insulated switchgear characterized in that at least one drawer connection part of the intermediate busbar selection disconnector is directly connected to one of the busbar selection disconnectors on the main busbar side. (2) The gas insulated switchgear according to claim 1, wherein the drawer connection portions on both sides of the intermediate busbar selection disconnector are directly connected to the adjacent busbar selection disconnectors on the main busbar side. (3) The method according to claim 1 or 1, wherein an insulating spacer constituting one disconnector is shared with the gas compartment of the other disconnector at the connecting portion of adjacent busbar selection disconnectors. Gas insulated switchgear.