JP2003219520A - Gas-insulated switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-insulated switching device, that contributes to space saving and cost reduction by minimizing an installation area to effectively utilize the installation area of the whole device. <P>SOLUTION: A feeder extraction part is arranged at a main busbar 2A, being almost orthogonal and horizontal relative to the axial direction of the main busbar 2A. A feeder-side disconnection switch 5A of a transmission line circuit and a grounding switch 6A are arranged at the extraction part. Furthermore, the grounding switch 6B for the main busbar 2A is arranged, opposing the disconnecting switch 5A and the grounding switch 6A. The grounding switch 6B is constituted of the same containers as those of the feeder-side disconnection switch 5A of a transmission line circuit 3A and the grounding switch 6A. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas switchgear capable of reducing the size and size of a power receiving and transforming facility, and more particularly to a gas insulated switchgear having an improved arrangement of the device.

[0002]

2. Description of the Related Art Conventionally, a gas-insulated switchgear has enclosed a metal cylindrical container with a gas such as SF6 gas having excellent insulating properties, and has insulated a high-voltage conductor and a contact for opening and closing a current. This is a switchgear that is insulated and supported using a spacer. Such gas-insulated switchgear has excellent economical efficiency and maintainability, and has recently become the mainstream of newly installed switchgear.

Here, a conventional example of the gas-insulated switchgear will be specifically described with reference to FIGS. FIG. 6 is a single-wire connection diagram showing a conventional gas-insulated switchgear in the short bus system, and FIG. 7 is a configuration diagram showing a gas-insulated switchgear based on the single-wire connection diagram of FIG. 6 (top is a plan view, bottom is a side view). , Fig. 8
FIG. 8 is a side view showing a bus section line of the gas insulated switchgear of FIG. 7.

As shown in FIGS. 6 and 7, the main bus is divided into main bus 2 by bus section line 1A and bus section line 1B.
It is divided into A, main bus 2B, and main bus 2C. A transmission line 3A is connected to the main bus 2A, a transformer line 4A is connected to the main bus 2B, and a transmission line 3B is connected to the main bus 2C.

The busbar division line 1A divides the main busbars 2A and 2B as described above, and the equipment configuration will be described with reference to FIGS. 7 and 8. That is, the main bus 2A is connected to the instrument transformer 7A via the ground switch 6B and the bus 8A, and further connected to the main bus 2B via the disconnector 5B and the ground switch 6C. At this time, the instrument transformer 7A
To connect the ground switch 6B and the disconnector 5B via
The busbar 8A extends rearward at a right angle to the main busbar 2A.

[0006]

However, the conventional gas-insulated switchgear has the following problems. That is, the busbar section line 1A is connected to the ground switch 6B of the main busbar 2A.
And a disconnecting switch 5B that separates the main bus 2A and the main bus 2B from each other are configured as individual containers.
Since the earthing switch 6B and the disconnect switch 5B are connected via A, a busbar 8A is required at a rear position substantially perpendicular to the main busbar 2A. For this reason, the arrangement configuration of the bus section line 1A is likely to be complicated, which causes a large size of the gas insulated switchgear.

Further, in recent years, it has been desired to reduce the amount of SF6 gas used from the viewpoint of the global environment, and also from this point, it is strongly desired to make the gas insulated switchgear compact. Furthermore, in the above-mentioned conventional example, since the main busbar 2A and the main busbar 2B have an arrangement configuration in which there is a step in the vertical direction, the transmission line 3A and the transformer line 4A have two types of cutoffs with different lead heights. I had to prepare a container, and the cost increased.

The present invention has been made in consideration of the above-mentioned circumstances, and a gas which contributes to space saving and cost reduction by effectively utilizing the installation area of the entire apparatus to reduce the installation area. An object is to provide an insulating switchgear.

[0009]

In order to achieve the above-mentioned object, the present invention arranges three main bus bars in a substantially straight line, and each main bus bar has the same axial direction as the main bus bar. A gas-insulated switchgear in which busbar disconnecting disconnectors are installed on a straight line and these busbar disconnecting disconnectors are connected by busbars has the following structural features.

According to the first aspect of the present invention, a feeder drawer portion is attached to each of the main busbars at a substantially right angle to the axial direction of the main busbar and a feeder drawer portion is attached horizontally, and the feeder drawer portion has a disconnector and a ground. A switch is arranged, a grounding switch for the main bus is arranged so as to face the disconnecting switch and the grounding switch, and a disconnecting switch and a grounding switch arranged in the feeder drawer portion and for the main bus It is characterized in that the grounding switch and the container are configured and arranged in one container. In the invention according to claim 1, the disconnecting switch and the grounding switch arranged in the feeder drawer portion and the grounding switch for the main busbar are constituted by one common container, so that the grounding for the main busbar is performed. A container unique to the switch is no longer necessary, and it is possible to promote compactness. Therefore, the space occupied by the device can be reduced, and the installation area can be reduced as a whole.

According to a second aspect of the present invention, in the gas-insulated switchgear according to the first aspect, the instrument transformer is arranged substantially at right angles to the axial direction of the main bus bar and horizontally, and the instrument transformer is provided. The connecting portion and the disconnecting device for dividing the busbar are configured and arranged in one container. In the invention according to the second aspect, the disconnecting switch for dividing the busbar and the transformer for measuring instrument can be arranged on the same horizontal plane as the main busbar. For this reason, it is possible to arrange the main busbars divided into three horizontally, and it is possible to simplify the busbar division line and shorten the busbar length. Further, the lead-out height of the circuit breaker connected to the main bus bar can be unified. Therefore, it is not necessary to prepare circuit breakers having different output heights, which can contribute to cost reduction.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the gas-insulated switchgear according to the aspect 1, the grounding switch for the main busbar and the disconnecting switch for dividing the busbar are constituted by three-position contacts. According to the third aspect of the present invention, since the grounding switch for the main busbar and the disconnecting switch for dividing the busbar are configured with three-position contacts, the operation required for each of the grounding switch and the disconnecting switch is performed. The devices can be integrated into one, and the device can be made compact.

According to a fourth aspect of the present invention, in the gas-insulated switchgear according to any one of the first to third aspects, a transformer line is provided in an intermediate main bus bar among the three main bus lines. It is characterized in that it is connected, the transmission line is connected to the main buses at both ends, and the instrument transformer is connected to the middle main bus. In the invention according to claim 4, since the instrument transformer is connected to the intermediate main bus which is connected to the transformer line among the three main buses, the main bus at both ends is connected. Even if the transmission line is switched, the main bus voltage can be detected with a single instrument transformer. Therefore, it is possible to reduce the number of installed transformers for meters, and it is possible to realize a compact device.

According to a fifth aspect of the present invention, in the gas-insulated switchgear according to any one of the first to fourth aspects, the main bus bar is arranged substantially directly above the control panel. In the invention according to claim 5, by disposing the main bus bar immediately above the control panel, the center of gravity of the gas insulated switchgear can be lowered, and the earthquake resistance can be improved and the reliability can be enhanced. .

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention (hereinafter referred to as an embodiment) will be described below with reference to FIGS. 1 to 5 are configuration diagrams of each embodiment, and the same or corresponding portions as those of the configuration of the conventional example shown in FIGS. 6 and 7 will be described using the same reference numerals. Similar to FIG. 7, FIGS. 1 to 5 are plan views of the upper stage and side views of the lower stage.

(1) First Embodiment [Configuration] The first embodiment corresponds to claims 1 and 2, and FIG. 1 is a configuration diagram of the first embodiment. As shown in FIG. 1, the main bus is a bus bar section line 1A and a bus bar section line 1
By B, it is divided into a main bus 2A, a main bus 2B, and a main bus 2C. A transmission line 3A and an instrument transformer 7A are connected to the main bus 2A, and a transformer line 4 is connected to the main bus 2B.
A, main bus 2C has a transmission line 3B and an instrument transformer 7
B is connected.

Further, a feeder lead-out portion is attached to the main bus 2A at a substantially right angle to the axial direction of the main bus 2A and horizontally. A feeder-side disconnector 5A and a ground switch 6A of the power transmission line 3A are arranged in this drawer. Further, a grounding switch 6B for the main bus 2A is arranged facing the disconnecting switch 5A and the grounding switch 6.
The grounding switch 6B is composed of the same container as the feeder side disconnector 5A of the power transmission line 3A and the grounding switch 6A. The main bus 2B and the main bus 2C have the same configuration. Further, in the first embodiment, the main bus 1A
An instrument transformer 7A is arranged substantially at right angles to the axial direction of and in the horizontal direction. The lead-out portion to which the instrument transformer 7A is connected and the busbar disconnecting switch 5B are configured and arranged in one container.

[Operation and Effect] Next, the operation and effect of the first embodiment will be described. That is, in the first embodiment, since the disconnecting switch 5A and the grounding switch 6A arranged in the feeder drawer and the grounding switch 6B for the main busbar 2A are configured with a single container, the conventional As described above, the container for the grounding switch 6B for the main bus 2A alone is unnecessary, and the space occupied by the device can be reduced. Therefore, it is possible to reduce the installation area of the entire device.

Further, in the first embodiment, since the disconnecting switch 5B for dividing the busbar and the transformer 7A for the measuring instrument can be arranged in the same horizontal plane as the main busbar 2A, the main busbar is divided into three. All of 2A to 2C can be arranged on the same horizontal plane, the arrangement configuration of the busbar section line can be simplified, and the busbar length can be shortened. Furthermore, since the output heights of the circuit breakers connected to the main buses 2A and 2B can be unified, the transmission line 3A and the transformer line 4
It is not necessary to prepare a circuit breaker having a different outlet height for A and the cost can be reduced.

(2) Second Embodiment [Structure] The second embodiment corresponds to claim 3 and will be described with reference to FIGS. 2 and 3. 2 and 3 are side views of the second embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The second embodiment is characterized in that the grounding switch for the main busbar and the disconnecting switch for dividing the busbar are constituted by three-position contacts, and the embodiment shown in FIGS. 2 and 3 is There is a difference in the part that constitutes the 3-position contact.

That is, in the embodiment shown in FIG. 2, the grounding switch 6C of the intermediate main bus 2B is constructed of the same container as the busbar disconnecting switch 5B. That is, the earthing switch 6C and the disconnecting switch 5B are constituted by three-position contacts. The grounding switch 6B of the main bus 2A is composed of the same container as the feeder-side disconnector 5A and the grounding switch 6A of the power transmission line 3A. Similarly, the grounding switch 6D of the main bus 2C is composed of the same container as the feeder side disconnector and the grounding switch of the power transmission line 3B.

On the other hand, in the embodiment shown in FIG. 3, the grounding switch 6B of the main busbar 2A at one end is constituted by the same container as the busbar disconnecting switch 5B of the busbar section line 1A, and similarly,
The ground switch 6D of the main bus 2C at the other end is the bus section line 1B
It is composed of the same container as the disconnecting switch 5C for dividing the busbar. That is, these ground switches 6B and 6D and the disconnector 5
B and 5C are composed of three-position contacts. The earthing switch 6C of the main bus 2B is composed of the same container as the feeder-side disconnecting switch of the transformer line 4A and the earthing switch.

[Operation and Effect] In the second embodiment as described above, the grounding switches 6B, 6C, 6D and the disconnecting switches 5B, 5C are constituted by three-position contacts, so that the respective operating devices can be operated as one unit. It has the effect that it can be integrated into one.
That is, in the embodiment shown in FIG. 2, among the main busbars 2A to 2C divided into three, the ground switch 6C of the intermediate main busbar 2B is connected to the disconnector 5B of the busbar section line 1A on one side and the three-position contact. On the other hand, in the embodiment shown in FIG. 3, among the main busbars 2A to 2C divided into three, the ground switches 6B and 6D of the main busbars 2A and 2C at both ends are connected to the busbar section line 1A. , 2A disconnectors 5B, 5C and three-position contacts to integrate the operation switches required for the ground switches 6B, 6C, 6D and the disconnectors 5B, 5C into one. You can This makes it possible to further reduce the size of the device.

(3) Third Embodiment [Structure] The third embodiment corresponds to claim 3, and FIG. 4 is a side view of the third embodiment. As shown in FIG. 4, in the third embodiment, the disconnecting switches 5B, 5 for dividing the busbars are used.
A transformer line 4A and an instrument transformer 7A are connected to a main bus 2B divided by C.

[Operation and Effect] In the fourth embodiment, the main bus 2B connected to the transformer line 4A is connected.
Since the instrument transformer 7A is connected to the
Even when switching between A and 3B, a single instrument transformer 7
The main bus voltage can be detected at A. Therefore, the number of instrument transformers 7A installed can be reduced, and the device can be made compact.

(4) Fourth Embodiment [Structure] The fourth embodiment corresponds to claim 4, and FIG. 5 is a side view of the fourth embodiment. As shown in FIG. 5, in the fourth embodiment, the main bus 2A,
It is characterized in that 2B and 2C and busbar section lines 1A and 1B are arranged.

[Operation and Effect] According to the fifth embodiment as described above, by disposing the main busbars 2A, 2B, 2C and the busbar section lines 1A, 1B just above the control panel 9, the gas insulated switchgear is provided. Has a low center of gravity. Therefore, the earthquake resistance can be improved, and the reliability of the device can be improved.

[0028]

As described above, according to the present invention,
By arranging the disconnecting switch and the grounding switch located in the feeder drawer and the grounding switch for the main bus in a single container, the installation area of the entire device is effectively utilized and the installation area is reduced. It is possible to provide a gas insulated switchgear that contributes to space saving and cost reduction.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing a second embodiment of a gas insulated switchgear according to the present invention.

FIG. 3 is a configuration diagram showing a second embodiment of a gas insulated switchgear according to the present invention.

FIG. 4 is a configuration diagram showing a third embodiment of a gas insulated switchgear according to the present invention.

FIG. 5 is a configuration diagram showing a fourth embodiment of a gas insulated switchgear according to the present invention.

FIG. 6 is a single wire connection diagram of a conventional gas insulated switchgear in a short bus bar system.

7 is a configuration diagram showing a gas-insulated switchgear based on the single line connection diagram of FIG.

FIG. 8 is a side view showing a bus section line.

[Explanation of symbols]

1A, 1B ... Bus line section line 2A, 2 ... Main bus 3A, 3B ... Transmission line 4A ... Transformer line 5A, 5B, 5C ... Disconnector 6A, 6B, 6C, 6D ... Grounding switch 7A, 7B ... Transformer for instrument 8A, 8B ... Bus 9 ... Control panel

Claims (5)

[Claims] 1. Main busbars divided into three are arranged on a substantially straight line, and each main busbar is provided with a disconnecting switch for busbar division on the same straight line as the axial direction of the main busbar. In the gas-insulated switchgear in which the disconnector is connected by a busbar, a feeder drawer is attached to each of the main busbars at a substantially right angle to the axial direction of the mainbusbar, and a feeder drawer is attached horizontally, and the feeder drawer is disconnected. And a grounding switch, and the grounding switch for the main bus is arranged so as to face the disconnecting switch and the grounding switch, and the disconnecting switch and the grounding switch arranged in the feeder drawer part and the main switch A gas-insulated switchgear, characterized in that a grounding switch for a busbar and a container are configured and arranged in one container. 2. A transformer for instruments is arranged substantially at right angles to the axial direction of the main busbar and horizontally, and a lead-out portion to which the transformer for instruments is connected and a disconnector for dividing the busbar are provided as one unit. The gas-insulated switchgear according to claim 1, wherein the switch is configured and arranged in a container. 3. The gas-insulated switchgear according to claim 1 or 2, wherein the earthing switch for the main busbar and the disconnecting switch for dividing the busbar are constituted by three-position contacts. 4. The main bus bar divided into three, a transformer line is connected to an intermediate main bus line, a transmission line line is connected to the main bus lines at both ends, and an instrument transformer is connected to the intermediate main bus line. The gas-insulated switchgear according to any one of claims 1 to 3, which is connected. 5. The gas insulated switchgear according to any one of claims 1 to 4, wherein the main bus bar is arranged substantially directly above a control panel.