JPH0523711U - Gas insulated switchgear - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a row board type cubicle-type gas insulated switchgear that facilitates transportation and loading and enables standardization for various varieties. [Constitution] An airtight box body for accommodating a unit circuit device is provided with a cable bus BUS, and a main rectangular container 2 accommodating only a busbar disconnecting switch DS and a circuit breaker CB among main circuit devices of a unit circuit.
0 and a sub-rectangular container 26 accommodating other devices of the unit circuit, and the containers 20 and 26 are detachably coupled to electrically connect the respective devices to form a unit circuit. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a row board type cubicle type gas insulated switchgear.

[0002]

[Prior Art]

This type of conventional gas-insulated switchgear (hereinafter referred to as GIS) is provided with one rectangular container as an airtight box, and all the devices of the unit circuit are housed together in this container, and insulating gas such as SF ₆ gas ( It is designed to insulate at a filling pressure of 0.5 kgf / cm ² ).

For example, FIGS. 6 and 7 show the case of a transmission line circuit unit of 84 kV class GIS, in which a partition is provided in the rectangular container 1 to receive a power receiving chamber 2, a disconnector chamber 3, a circuit breaker chamber 4, and a busbar outlet. A cable terminal CHd and a lightning arrester LA, which form a chamber 5 and in which a cable 6 serving as a power receiving wire is detachably connected to the power receiving / drawing chamber 2, are housed, and a current transformer for an instrument is provided in the disconnector chamber 3. The CT, the earthing switch ES and the disconnecting switch DS are stored, the circuit breaker CB is further stored in the circuit breaker chamber 4, the instrument current transformer CT and the disconnecting switch DS are stored in the bus bar drawing chamber 5, and A busbar bushing 7 is hermetically provided on the wall of the container, and a cable-type busbar BUS is connected to this. In addition, 8 is an operation device for a circuit breaker, and 9 and 10 are operation devices for a disconnecting switch DS provided in the disconnecting switch chamber 3 and the bus bar drawing chamber 5, respectively.

8 and 9 show the case of a transformer circuit unit of this type of GIS, in which a partition is provided in a rectangular container 11 to form a bus bar lead-in chamber 12, a circuit breaker chamber 13 and a cable lead-out chamber 14. The busbar bushing 15 to which the cable type busbar BUS is connected is airtightly provided on the container wall on the upper surface of the busbar drawing chamber 12, and the disconnector DS is housed in the busbar drawing chamber 12 and further cut off. The circuit breaker CB is housed in the equipment room 13, and the current transformer CT and the grounding switch ES for the instrument are housed in the cable drawing room 14 and the cable 16 for the cable 16 connected to the primary side of the transformer is housed therein. Cable terminal CHd. Reference numeral 17 is an operation device for a circuit breaker, and 18 and 19 are operation devices for a disconnecting switch DS and a grounding switch ES, respectively. Further, in the above-mentioned example, the bus BUS is of cable type, but may be of gas insulation type.

[0005]

[Problems to be solved by the device]

 As described above, the conventional GIS of this type has a configuration in which all the constituent devices of the unit circuit are housed in one rectangular container 1 and 11 at a time. It has the drawback that it cannot be split and disassembled before shipping. In the above-mentioned 84kV rated class GIS, the size of one line is approximately 1.5m wide, 3.5m deep, and 3.2m high. However, it has a drawback that it cannot be carried indoors, especially into existing buildings. Also, for various connection configurations such as various units, it is necessary to individually design and manufacture the entire unit including the rectangular container, which makes it difficult to standardize for various types of variations. .

The present invention has been made in view of such problems of the conventional technology, and an object of the present invention is to make it easy to transport and carry in and to standardize equipment. It is to provide a board type cubicle type GIS.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the GIS of the present invention, an airtight box for accommodating a unit circuit device is provided with a cable bus bar or a gas-insulated bus bar, and a main circuit device of a unit circuit has a disconnector and a disconnector for the bus line. It consists of a main rectangular container that stores only the container and a sub-rectangular container that houses the other devices of the unit circuit, and both containers are detachably connected to electrically connect the respective devices. However, the unit circuit is configured.

[0008]

[Action]

 In the GIS having the above-mentioned configuration, the airtight box that houses the unit circuit device is configured by connecting the main rectangular container and the sub-rectangular container, and therefore, during transportation, loading into an existing room, installation, etc. Both containers can be divided and transported and loaded individually. In addition, since the busbar, busbar disconnector and breaker in the main rectangular container are common to all units such as various transmission line circuit units and transformer circuit units, this main rectangular container can be standardized. It is possible to form a desired unit by accommodating the other devices in the unit circuit in the sub-rectangular container and connecting them to the main rectangular container.

[0009]

【Example】

 Examples will be described with reference to FIGS. 1 to 5. First, a first embodiment shown in FIGS. 1 to 3 is a case where it is applied to a power transmission line circuit unit, and 20 is a main rectangular container integrally provided in a front box 21, and a cable type busbar is provided on an upper wall. A busbar bushing 22 to which a BUS is detachably connected is provided in an airtight manner, a circuit breaker CB is provided at the bottom, and a busbar disconnector DS is installed on the circuit breaker CB. In addition to the main circuit devices of the switch CB and the disconnector DS, a grounding switch ES linked to the disconnector DS is stored.

A circuit breaker operating device 23 is arranged at a position immediately below the main rectangular container 20 in the front box 21, and the busbar disconnecting switch DS and a line to be described later are provided on the front surface of the main rectangular container 20. Each operation device 24, 25 of the disconnecting switch DS is attached, and a control device (not shown) and the like are also housed in the front box 21.

Reference numeral 26 is a sub-rectangular container provided integrally with the rear box 27, and is a device other than the above in the transmission line circuit unit, that is, a line disconnector DS, a grounding switch ES, a cable terminal CHd and a lightning arrester. The LA is housed integrally, and the transmission line cable 28 is detachably connected to the cable terminal CHd from below the sub-rectangular container 26 in the rear face box 27, and this cable 28 has an instrument current transformer. The vessel is attached.

As shown in FIG. 2, the main prismatic container 20 and the sub-rectangular container 26 include a connecting piece 29 provided on the rear peripheral edge of the main rectangular container 20 and a connecting piece 30 provided on the front peripheral edge of the sub-rectangular container 26. Are integrally connected by connecting them with bolts 31 and nuts 32, and electrical connection between respective devices in both containers 20 and 26 is performed using an insulating bushing 33.

The insulating bushing 33 is attached by a bolt 35 to a through hole 34 that is transparently provided on the front surface of the sub-rectangular container 26, and is kept airtight by an O-ring 36, and is transparent on the rear surface of the main rectangular container 20. The penetrating conductor of the insulating bushing 33 is introduced into the main rectangular container 20 through the provided through hole 37, and is connected to the main circuit conductor in the main rectangular container 20 via the tulip contact 38. Reference numeral 39 is an O-ring that hermetically closes the insulating bushing 33 and the peripheral edge of the through hole 37 of the main rectangular container 20.

In this case, since the through hole 34 of the sub-rectangular container 26 is always airtightly closed by the insulating bushing 33, the sub-rectangular container 26 can be assembled and gas-treated at the factory. Regarding the main prismatic container 20, the gas treatment will be carried out after the two containers 20 and 26 are combined on site.

In the GIS having such a configuration, after assembling and testing (inspecting) at the factory, both containers 20 and 26 can be divided and individually transported and carried in the field. , 26 can reduce the useless space compared to the conventional case where all the devices are stored in one rectangular container at a time. Therefore, the volume is less than half of the conventional container, and the existing condition with severe transport and carry-in conditions is reduced. It can be easily installed in buildings and basements. The bus bar BUS provided in the main rectangular container 20 may be not only the cable system described above but also a gas insulation system.

Next, a second embodiment shown in FIGS. 4 and 5 is a case where the second embodiment is applied to a transformer circuit unit, and similarly to the first embodiment, the busbar bushing 22, the disconnector DS, the grounding switch ES, and A main rectangular container 20 equipped with a circuit breaker CB is integrally provided in a front box 21, and a cable end CHd in which a cable 42 is detachably connected to a sub-rectangular container 41 integrated in a rear box 40 is housed. At the same time, the main rectangular container 20 and the sub-rectangular container 41 are integrally connected, and the respective devices in both containers 20 and 41 are connected via an insulating bushing 43. In this case, it is clear that the sub-rectangular container 41 is much smaller than half of the conventional rectangular container.

In the first and second embodiments described above, the case of the transmission line circuit unit and the transformer circuit unit is shown. However, the busbar BUS, the busbar disconnector DS and the circuit breaker provided in the main rectangular container 20 are shown. Since the structure of the CB is a common part of all units such as various transmission line circuit units and transformer circuit units, the main rectangular container 20 is standardized and fixed, and then stored in the sub rectangular container and this. By preparing the equipment configuration according to the application, various units can be easily configured, and there are many types of sub-rectangular containers and various sizes, but at least more than half of the conventional ones. It doesn't grow, and the variation of each unit is limited to this small part, so the production can be done in a relatively short time and easily.

[0018]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Since the airtight box that houses the unit circuit equipment is composed of the main rectangular container and the sub-rectangular container, both containers can be divided during transportation and transportation, which facilitates transportation and transportation. It can be installed in a building with severe conditions, a basement, etc., and can easily deal with the renewal of GIS in an existing building.

Moreover, since the main rectangular container accommodates the busbar, the busbar disconnecting switch, and the circuit breaker common to various units, the main rectangular container side can be standardized and fixed. Only the small part on the side needs to be dealt with, which makes it easy to deal with variations, and the cost reduction and the manufacturing period can be shortened by standardization.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a cross-sectional view showing a connecting portion between a main rectangular container and a sub-rectangular container in FIG.

FIG. 3 is a single line connection diagram of FIG.

FIG. 4 is a schematic configuration diagram showing a second embodiment of the present invention.

5 is a single line connection diagram of FIG. 4. FIG.

FIG. 6 is a schematic configuration diagram showing a conventional example.

FIG. 7 is a single line connection diagram of FIG.

FIG. 8 is a schematic configuration diagram showing another conventional example.

9 is a single line connection diagram of FIG. 8. FIG.

[Explanation of symbols]

 20 Main Square Container 26 Sub Square Container BUS Bus Bar DS Disconnector CB Circuit Breaker 41 Sub Square Container

Claims (1)

[Scope of utility model registration request] 1. A cubical type gas-insulated switchgear of a row board type, in which unit circuit devices are housed in an airtight box, wherein the box is provided with a cable busbar or a gas-insulated busbar and is a main unit circuit unit. Of the circuit devices, the main rectangular container containing only the busbar disconnecting switch and the circuit breaker, and the sub-rectangular container containing other devices of the unit circuit, the two containers are detachably coupled to each other. A gas-insulated switchgear in which the respective units of the container are electrically connected to form the unit circuit.