JP2012231576A - Gas insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas insulated switchgear which achieves standardization of housed devices and facilitates the manufacturing by combining the housed devices.SOLUTION: A gas insulated switchgear includes: a power reception unit having a cable head 5 with which a power cable connects; a power source side disconnector with a grounding switch 7 opening and closing a main circuit connected with the power reception unit; a load side disconnector with a grounding switch 11; an opening and closing unit having a vacuum circuit breaker 10; a bus bar unit connecting with the opening and closing unit and having a bus bar 12 used for connecting with an adjacent board; and an insulation gas sealed in the power reception unit and the opening and closing unit.

Description

  Embodiments described herein relate generally to a gas-insulated switchgear that standardizes storage devices such as vacuum circuit breakers and disconnectors.

2. Description of the Related Art Conventionally, a gas-insulated switchgear (C-GIS) in which a storage device is stored in a box and an insulating gas such as SF ₆ gas is sealed to reduce the overall shape is known (for example, Patent Documents). 1).

  As shown in FIG. 7, this type of gas-insulated switchgear includes a box 1 that is divided into gases by an L-shaped partition wall 2, a power receiving chamber 3 in the lower part of the figure on the back side and the front side, and an upper part in the figure on the front side The switch room 4 is configured separately.

  The power receiving chamber 3 has an L-shaped cable head 5 in the middle part, a lightning arrester 6 on the ceiling side, a disconnector in which the electrode rotates in the lower part on the front side, and a ground switch that directly moves the electrode. The disconnecting switch 7 with a ground switch is provided and connected by a connecting conductor 8. The load side of the disconnector with grounding switch 7 on the power source side is connected to an insulating spacer 9 fixed to the partition wall 2.

  The switch chamber 4 is provided with a vacuum circuit breaker 10 equipped with a vacuum valve in the lower stage, and a load-side disconnecting switch 11 with a load-side ground switch similar to the power supply side in the upper stage, and is connected by a connection conductor 8. The load side of the disconnecting switch with grounding switch 11 is connected to the bus 12 that connects the panels provided on the ceiling. Note that an insulating gas is sealed in the switch chamber 4 excluding the power receiving chamber 3 and the bus bar 12.

  In such a gas-insulated switchgear, storage devices from the cable head 5 to the bus bar 12 are selected in accordance with the circuit configuration of the applied power system. For this reason, depending on the customer specifications, the box 1 is designed and manufactured each time. Therefore, a great deal of time is required from design to manufacture.

JP 2010-22139 A

  The problem to be solved by the present invention is to provide a gas-insulated switchgear that can be easily manufactured by standardizing storage devices and combining them in accordance with the circuit configuration of a power system.

  In order to solve the above problems, a gas insulated switchgear according to an embodiment includes a power receiving unit that receives power, an opening / closing unit that opens and closes a main circuit connected to the power receiving unit, and an adjacent panel connected to the opening / closing unit. A bus bar unit for connection to the power supply unit, and the insulating unit enclosed in the power receiving unit and the opening / closing unit.

The side view which shows the structure of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the power receiving unit of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the power receiving unit of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the opening / closing unit of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the opening / closing unit of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the measurement unit of the gas insulation switchgear which concerns on the Example of this invention. The side view which shows the structure of the conventional gas insulation switchgear.

  Embodiments of the present invention will be described below with reference to the drawings.

  A gas insulated switchgear according to an embodiment of the present invention will be described with reference to FIGS. 1 is a side view showing a configuration of a gas insulated switchgear according to an embodiment of the present invention, FIGS. 2 and 3 are side views showing a power receiving unit of a gas insulated switchgear according to an embodiment of the present invention, and FIG. FIG. 5 is a side view showing a gas insulated switchgear opening / closing unit according to an embodiment of the present invention, and FIG. 6 is a side view showing a gas insulated switchgear measuring unit according to an embodiment of the present invention. In addition, in each figure, the same code | symbol was attached | subjected about the component similar to the past.

  As shown in FIG. 1, a box 1 is divided into a plurality of six parts, and a power receiving chamber 3 in the lower part of the figure on the back side and the front side, and an upper part in the figure on the front side, with an L-shaped partition wall 2 as a boundary. The switch room 4 is configured separately.

  On the back side of the power receiving chamber 3, a power receiving unit having an L-shaped cable head 5 to which a power cable is connected is provided on the upper side in the figure. The lower portion of the first box 21 constituting the power receiving unit is opened. The left part of the figure is fixed to one side surface of the L-shaped board wall 2. In the lower stage, a lightning protection unit with a lightning arrester 6 is provided. The second box body 22 constituting the lightning protection unit is connected to the first box body 21 with its upper portion shown in the figure being opened. In addition, the left part in the figure is open.

  On the front side, there is provided a first switching unit to which is attached a disconnecting switch 7 with a grounding switch on the power source side combined with a disconnecting switch in which the electrode moves directly and a grounding switch in which the electrode moves in the same manner. . The third box 23 constituting the first opening / closing unit is open at the right side in the figure and is connected to the second box 22. Further, the upper part in the figure is fixed to the other side surface of the panel wall 2 to which the insulating spacer 9 is fixed. Each storage device is connected by a connection conductor 8.

  The switch chamber 4 is provided with a second switch unit for opening and closing a main circuit having a vacuum circuit breaker 10 mounted with a vacuum valve in the lower stage. The fourth box body 24 constituting the second opening / closing unit is fixed to the L-shaped panel wall 2 at the lower part and right part in the figure, and the upper part is opened. The upper stage is provided with a third switching unit to which a load-side disconnecting switch 11 with a ground switch similar to the power supply side is attached. The fifth box 25 constituting the third opening / closing unit is connected to the fourth box 24 with the lower portion in the figure open. Connected to the ceiling is a busbar unit 12 connected to the busbar 12 accommodated in the sixth box 26, so-called an adjacent panel. Each storage device is connected by a connection conductor 8.

  The switch chamber 4 excluding the power receiving chamber 3 and the sixth box 26 is filled with an insulating gas. Further, the first box body 21, the second box body 22, the third box body 23, the fourth box body 24, and the fifth box body 25 are connected in an airtight manner, for example, by welding.

  Next, another configuration of the power receiving unit will be described with reference to FIGS.

  As shown in FIG. 2, a T-shaped cable head 27 is attached to the first box body 21. The cable head 27 can receive power from two directions in the vertical direction in the figure, and is for indoor use similar to the cable head 5 described above. For outdoor use, as shown in FIG. 3, a bushing 28 connected to the overhead wire is attached to the first box 21.

  Next, another configuration of the opening / closing unit will be described with reference to FIGS.

  As shown in FIG. 4, a ground switch 29 in which the electrode moves linearly is attached to, for example, the third box 23. Further, as shown in FIG. 5, a disconnector 30 in which the electrode moves linearly is attached to, for example, the third box 23.

  Next, the measurement unit will be described with reference to FIG.

  As shown in FIG. 6, the instrument transformer 31 is attached to the second box 22, for example. An instrument current transformer can also be installed. The measurement unit is connected to the power supply side before and after the lightning protection unit.

  As a result, the storage device can be standardized as a power receiving unit, a lightning protection unit, a measurement unit, an opening / closing unit, and a busbar unit, and each unit can be selected according to the circuit configuration of the power system. For this reason, even if the storage devices are diversified according to customer specifications, the time required for manufacturing can be greatly reduced.

  According to the gas-insulated switchgear of the above embodiment, since the storage device is standardized as a unit, the time from design to manufacture can be greatly shortened.

  In the above embodiment, the circuit configuration has been described using the power receiving unit, the lightning protection unit, the measurement unit, the switching unit, and the bus unit. However, when configuring the power system, the power receiving unit, the switching unit, and the bus unit are the minimum necessary. It will be a thing. A lightning protection unit is unnecessary in a place where there is no lightning damage, and a measurement unit is not required when measurement is performed with an external device.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1, 2, 22, 22, 23, 24, 25, 26 Box 2 Bulkhead 3 Power receiving chamber 4 Switch room 5, 27 Cable head 6 Lightning arrester 7, 11 Disconnector with ground switch 8 Connection conductor 9 Insulating spacer 10 Vacuum circuit breaker 12 Busbar 28 Bushing 29 Grounding switch 30 Disconnector 31 Instrument transformer

Claims (4)

A power receiving unit for receiving power;
An open / close unit that opens and closes a main circuit connected to the power receiving unit;
A busbar unit for connecting to an adjacent panel connected to the opening / closing unit;
A gas insulated switchgear comprising the power receiving unit and an insulating gas sealed in the open / close unit.   The gas insulated switchgear according to claim 1, wherein the power receiving unit includes a cable head to which a power cable is connected and a bushing to which an overhead wire is connected.   The gas insulated switchgear according to claim 1, wherein the switching unit includes a disconnector with a ground switch, a vacuum circuit breaker, a ground switch, and a disconnector. Connect at least one of the lightning protection unit and the measurement unit to the power receiving unit,
The gas insulated switchgear according to any one of claims 1 to 3, wherein the open / close unit is connected to the lightning protection unit and the measurement unit.

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