CN1107264A - Composite gas insulated switch system - Google Patents

Abstract

A composite gas insulated switch system with a single busbar structure, characterized by comprising: a container containing a switch unit including a gas insulated switch connected to a branch busbar; a plurality of connecting ports respectively installed on the container; a a disconnector mounted on one of said plurality of connection ports; a disconnector electrically connected to the gas insulated switch and the others electrically connected to a main bus; a movable cable for testing the switch unit; and a cable Adapter for electrically connecting the movable cable to a connection point between the disconnector and the gas insulated switch.

Description

The present invention relates to a composite gas insulated switch system, which has a cable adapter, which borders the movable cable to the bus bar, and the bus bar is located in a container, which contains a gas insulated switch (hereinafter referred to as GIS ) of the switching unit.

A common example is shown in Figures 1 and 2, and its circuit diagram is shown in Figure 3. In Figures 1 and 2, a movable cable 6 is used to test the GIS unit;

Each of the movable cable 6, 6a, or 6b and the cable adapter 5, 5a, or 5b is composed of three phases. The movable cable 6, 6a or 6b is usually connected to a connection port 7 or 8, one side of which is only used as a special cable adapter to send out a main bus terminal or a feed unit (or bank unit).

In Figures 1 and 2, the number 1 represents a switch unit; 2, 3 represent a connection port; 4, 4a, 4b represent a bus isolating switch; 9 represents a main bus; 10 represents GIS; 11 represents the control box of the isolating switch ; 12 represents a container for the main busbar and its isolating switch; 13 represents an insulating support (partition); 14, 14a or 14b represents a branch bus; 15 represents a unit control box; 16 and 17 represent the control of the GIS mechanism.

In a common movable cable connection system, a dedicated connection port 7, 8 is used to connect the cable adapter to the busbar, as described above, and an appropriate installation location is selected according to the specific application.

Thus, an increase in the number of system components is a problem. Also, when a line-to-ground fault occurs at one main busbar side 9 of the disconnector 4, 4a, 4b, it is impossible for the GIS to act as a protector because the connection position of the movable cable is limited to the side to send out the feeder unit (or touch row unit).

An example of such a gas insulated switch is disclosed in Japanese Laid-Open Patent Application No. 60-183911 (1985).

The object of the present invention is to provide a gas insulated switch system, which has a cable adapter for electrically connecting the movable cable to a connection position between the disconnector and the gas insulated switch through other multiple connection ports.

In order to achieve the above objects, the present invention is characterized in that several connection ports are housed in a container which accommodates the switching unit so that the GIS acts as a protector.

The switch unit of the GIS of the present invention always includes a plurality of connection ports. They are supplied as part of the standard and correspond to single/double busbar configurations.

In the case of a single busbar structure, since the connection port 2 or 3 is unnecessary, an object of the present invention is achieved by using the connection port with the cable adapter to connect the moving cables.

Figure 1 shows a conventional embodiment in which a sports cable adapter is connected to a busbar end.

Figure 2 shows a conventional embodiment in which a dedicated connection to the feed unit cable adapter is provided.

FIG. 3 is a circuit diagram of the example in FIG. 2 .

Figure 4 is a schematic diagram of an embodiment of the invention in which the motion cable is connected to the switching unit.

FIG. 5 is a circuit diagram of the embodiment shown in FIG. 4 .

The embodiment of the invention shown in Figures 4 and 5 is described below.

As an embodiment of the present invention, Fig. 4 shows the connection method of a movable cable 6, 6a, 6b, to test the gas insulated switch unit 1; The cable is connected to the connection port 3, 3a or 3b contained in a container, This container accommodates the switch unit 1 including the GIS.

In the case of a single busbar structure, a connection port 3, 3a or 3b of the switch unit 1 becomes unnecessary, and a cable adapter 5, 5a or 5b connected to the movable cable 6, 6b passes through a connection port 3, 3a or 3b is connected to a connection position between the isolating switch 4, 4a or 4b and the switch 10, 10a or 10b.

In Fig. 4, a disconnector 4 is connected to the busbar at the connection port 2; the movable adapter 5, 5a or 5b is connected to the busbar at the connection port 3; but this positional relationship can also be applied in the same way in the opposite case.

Numeral 18 represents a cable head container; 19 represents a cable head; 20 represents a flat plate; 21 represents a straight-through current transformer.

In this embodiment of the invention, the cable adapters 5, 5a, 5b connected to the movable test cables 6, 6a, 6b are connected to the connection port of a container for accommodating conventional switching units without Connect the cable distribution device 5,5a, 5b to a dedicated connection port (jue) 7,8 under the situation has been installed.

Thus, if a fault occurs at the main busbar side 9 of one disconnector 4, the movable test cable 6 can be connected to the main busbar when power is being transmitted or received.

According to the present invention, since a dedicated connection port for a cable adapter becomes unnecessary by using a pre-installed connection port (of the switch unit), the number of components, cost expenditure are reduced, and construction of the GIS becomes simple.

At the same time, when a line-to-ground fault occurs at the main bus side 9 of the isolating switch 4, since the movable cable is connected to a connection position between the GIS and the isolating switch, it is possible to use the GIS as a protector in the transmission and reception of power. At the same time, the movable experimental cable 6 is connected to the main bus.

Claims (4)

1. A composite gas insulated switch with a single busbar structure, The composite gas insulated switch is characterized in that a cable adapter for connecting a movable cable is installed on a switch unit. 2. A composite gas insulated switch system with a single busbar structure, the system is characterized in that it includes: a container housing a switch unit comprising a gas insulated switch connected to a branch bus, A plurality of connecting ports are mounted on the container respectively, an isolating switch installed on one of the plurality of connection ports, one of the isolating switches is electrically connected to the gas insulated switch, and the remaining isolating switches are electrically connected to a main bus, a movable cable for testing the switch unit, and A cable adapter to connect the movable cable to a connection point between the disconnector and the gas insulated switch through other multiple connection ports. 3. The composite gas insulated switch system according to claim 2, characterized in that, The isolating switch protects the movable cable from the line voltage of the main bus by disconnecting the main bus. 4. The composite gas insulated switch system according to claim 2, characterized in that, The gas insulated switch protects the movable cable from bearing the line voltage of the branch bus by disconnecting the branch bus.

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