JPH0435965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a gas insulated switchgear for a double bus type circuit, and more particularly to a gas insulated switchgear in which the layout of the equipment constituting the device is improved.

[Technical background of the invention and its problems]

Gas-insulated switchgear is a container filled with SF ₆ gas, etc., which has excellent insulation and arc-extinguishing properties, and houses the disconnector, the disconnector, the disconnector, and the disconnector, as well as equipment such as busbars. This is a combination structure. This type of switchgear can be configured to be significantly smaller than an air-insulated switchgear. In recent years, due to the remarkable rise in land prices, gas-insulated switchgears, which can be made smaller, have been increasingly used in substations. Furthermore, by rationally arranging the components, further miniaturization can be achieved, making it possible to reduce the cost of gas-insulated switchgear and to construct substations, including buildings for indoor gas-insulated switchgear. change is being measured.

By the way, FIG. 1 shows a single wire connection circuit showing an example of the configuration of a double bus type substation. This circuit is an example of a circuit connected by a power cable. A side view of the conventional equipment configuration using the above circuit is shown in the second figure.
As shown in the figure.

In FIGS. 1 and 2, a shingle disconnector 3 having outlet terminal portions 1 and 2 protruding in the same direction is arranged vertically so that the terminal portions 1 and 2 are located on one side. However, the disconnector 5 on the A bus 4 side and the disconnector 7 on the B bus 6 side, each having a disconnection section perpendicular to the direction of the outlet terminal section 1 located below, are arranged in parallel. A grounding device 8 having a grounding terminal is disposed within the container of the disconnector 7 on the axis in the direction in which the outlet terminal portion 1 projects. Further, equipment on the line side is arranged in the direction in which the output terminal portion 2 located above projects, that is, above the disconnectors 5 and 7. That is, a current transformer 9, a disconnector 11 incorporating a grounding device 10, and a cable terminal device 12 are arranged in a direction perpendicular to the protruding direction of the outlet terminal portion 2, and a power cable 13 is connected thereto.

In the equipment arrangement described above, the busbar side disconnectors 5 and 7 are arranged in parallel to the outlet terminal section 1 below the line disconnector, and the busbar side grounding device 8 is arranged on an extension of the terminal section 1. Therefore, a connection bus bar 14 is installed between the current transformer 9, the disconnector 11, the grounding device 10, and the cable terminal device 12 at the final end, which are located on the extension of the outlet terminal section 2 at the top of the cable disconnector 3. Requires. Therefore, the second
There is a drawback that the longitudinal dimension l of the side surface of the gas insulated switchgear shown in the figure becomes long.

[Purpose of the invention]

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to obtain a gas-insulated switchgear that reduces the number of joint busbars, minimizes the longitudinal dimensions of the side surfaces, and enables rational arrangement. It is something to do.

[Summary of the invention]

According to the present invention, in order to achieve such an objective,
The upper and lower outlet terminals of the shield disconnector are made to protrude in different directions, and a grounding device is connected to the lower outlet terminal.
The main bus bar is disposed at both ends of the earthing device and the disconnector on a line parallel or perpendicular to the direction of connection and separation of the grounding device and the disconnector, respectively, via a disconnect switch integrated with the bus bar.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

FIG. 3 shows a side view of a gas insulated switchgear constructed from the single line circuit diagram of FIG. 1 according to the present invention. A sheath breaker 3 is vertically disposed with outlet terminal parts 1 and 2 protruding in opposite directions from the top and bottom of the sheath breaker tank to form a substantially Z-shaped arrangement as a whole. The shear section of the shear disconnector 3 approaches and separates in the axial direction of the shear disconnector tank. Then, a grounding device 8 having two terminal directions parallel to the contact/separation direction of the shield breaker 3 is arranged on the outlet terminal portion 1 located at the bottom, and an A having an electrode portion on the two terminal direction axes. Disconnector 5 on busbar 4 side
and a disconnector 7 on the B bus 6 side. That is, these disconnectors 5 and 7 are of a construction integral with the busbar, which is known per se. On the other hand, the circuit components connected to the terminal section 2 located at the upper part of the disconnector 3 have an L-shaped configuration as a whole. First, the current transformer 9 is placed on the extension in the projecting direction of the outlet terminal portion 2, and the line-side disconnect switch 11 and the grounding device 10 are provided at the corner of the L shape. A cable terminal device 12 is disposed below this disconnector 11 in parallel to the direction in which the cable disconnector 3 approaches and separates, and a power cable 13 is connected to this terminal device.

In the above configuration, by matching the height level of the A bus bar 4 connected to the lower output terminal part and located at the upper part with the height level of the upper output terminal part 2, the A bus bar 4 and the B bus bar, which are double busbars. 6. Bus-TIE line and
When connecting a Bus-Section line, for example a Bus-TIE line as shown in the single line diagram in Figure 7, this
The bus-TIE line disconnector 3a is connected to the disconnector 3a.
Use a terminal with an output terminal at the same height as A
Connection can be made without adjusting the height level between the bus bar 4 and the upper outlet terminal portion of the breaker 3a, and the equipment configuration of the Bus-TIE line can be arranged rationally. In other words, it is possible to simplify the connection between the Bus-TIE line disconnector 3a and the A bus 4. Furthermore, if the sheath breaker 3a is of the same shape as the sheath breaker 3 described above, it is possible to reduce the cost in the manufacturing process.

FIG. 4 shows a side view of a gas insulated switchgear used in an indoor double bus type bushing lead-in circuit. In Figure 4, the same parts as in Figure 3 are given the same symbols, and the difference from the configuration in Figure 3 is that the circuit components connected to the upper outlet terminal section 2 are of a linear configuration. It is a point. A disconnector 10 is connected to the current transformer 9 to connect and separate the disconnector in the protruding direction of the outlet 2, and a bushing 15 is established at the extension of the disconnector via the connection bus 14. A connection busbar 14 is adapted to pass through a wall 16 of the building.

On the other hand, the one shown in FIGS. 5 and 6 is a gas-insulated switchgear applied to a double-bus type cable lead-in circuit in which the arrangement of the main bus bars is different.
The figure shows a plan view, and FIG. 6 shows a side view. In this configuration as well, the same parts as in FIG. 3 are given the same reference numerals.
The direction of the lead-out direction is 90° different from the plane perpendicular to the axial direction of the breaker tank. A T-shaped grounding device 8 is connected to the lower outlet terminal portion 1, and an A bus 4 and a B bus 6 are connected to each outlet of the connection bus through disconnectors 5 and 7, respectively. In this case, the B bus bar 6 will be placed below the current transformer 9 connected to the upper outlet terminal portion 2.

〔Effect of the invention〕

According to the present invention as described above, it is possible to minimize the number of extra connecting busbars between the constituent devices, and by reducing the longitudinal direction l of one line, the gas insulated switchgear as a whole can be improved. Can be reduced.
In particular, for indoor gas insulated switchgear, the building and foundation structure thereof can be further downsized and simplified, and the cost of the gas insulated switchgear and its auxiliary equipment can be significantly reduced. Furthermore, by matching the height level of the main bus bar located at the top of the first and second main bus bars to the height level of the output terminal section located at the top, it is possible to
- It is possible to simplify the connection with the constituent devices of the TIE line and Bus-Section line, and to rationally arrange them.

[Brief explanation of drawings]

Fig. 1 is a single line diagram of a double busbar system for cable entry, Fig. 2 is a side view of a conventional gas insulated switchgear, and Fig. 3 is a side view of a gas insulated switchgear according to an embodiment of the present invention. Fig. 4 is a side view of a gas insulated switchgear having a double bus type bushing lead-in circuit configuration showing another embodiment of the present invention, and Fig. 5 is a side view of a gas insulated switchgear having a double bus bar type bushing lead-in circuit configuration, showing another embodiment of the present invention. A plan view of the cable lead-in circuit configuration of the double bus system, Figure 6 is a side view of Figure 5, and Figure 7 is a diagram of the double bus system.
It is a single line diagram showing a Bus-TIE line. DESCRIPTION OF SYMBOLS 1, 2...Output terminal part of the breaker, 3...The breaker, 4, 6...Main bus, 5, 7...Bus bar side disconnector, 11...Line side disconnector, 12 ... Cable terminal device, 13 ... Power cable, 15 ... Bushing.

Claims (1)

[Claims] 1. A lower part of a vertical cutter having upper and lower outlet terminal portions provided in different horizontal planes perpendicular to the cutting direction of the cutter and in different protruding directions. A grounding device is placed at the lower outlet terminal section located at a first and a second having a part
The main busbar is arranged so that the longitudinal direction of the main busbar is perpendicular to the direction of contact and separation of the shear section of the shear cutter, and symmetrically about the axis of the protrusion direction of the lower outlet part. A gas insulated switchgear characterized by: 2. A lower outlet located at the lower part of a vertically installed shear cutter having upper and lower outlet terminals provided in different horizontal planes perpendicular to the cutting direction of the sheath cutter and in different protruding directions. A grounding device is disposed in the terminal portion, and first and second electrode portions of the busbar side disconnector are provided at both ends of the grounding device on a line parallel to the cutting direction of the wire disconnector. The main busbar is arranged so that the longitudinal direction of this main busbar is perpendicular to the direction of approach and separation of the shear break of the above-mentioned shear breaker, and the upper part of these first and second main busbars is A gas insulated switchgear characterized in that the height level of the main busbar located therein is matched to the height level of the outlet terminal part located at the upper part.