JPH04368408A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To provide a gas insulated switchgear which can be increased in its capacity by improving the cooling effect of a circuit breaker. CONSTITUTION:A sealed container 32 which is positioned below main buses 4 and 5 and main-bus side disconnectors 2 and 3 and is provided with a vertical section 32a on the side of the disconnectors 2 and 3 opposite to the main buses 4 and 5. Then, by providing a vertical type circuit breaker 1 supported by a side wall 24, with the movable section of its circuit breaking section and a link mechanism 33 being positioned in its lower section, in the container 32 below the main buses 4 and 5 and vertical section 32a, the heat generated by the breaker 1 is radiated by utilizing the convection of an insulating gas in the vertical section 32a.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a gas insulated switchgear, and more particularly, the present invention relates to a gas insulated switchgear, in which each component is housed in a closed container filled with an insulating gas, and a cubicle is arranged outside the closed container. Related to insulated switchgear.

0002

[Prior Art] As a conventional gas insulated switchgear of this type,
JP-A-62-141910 and JP-A-62-1
One disclosed in Japanese Patent No. 51911 is known. These gas-insulated switchgears consist of a circuit breaker, line-side disconnector, current transformer, grounding switch, etc. in a sealed container filled with insulating gas at a pressure of 2 kg/cm2G or less, and the line-side end of these devices is is insulated from the sealed container with the cable head, and the bus-side end on the opposite side of the device is connected via an insulating spacer to the bus-bar container containing the bus-side disconnect switch and the main bus conductor, and further connected to the circuit breaker operating device. It was constructed by placing a cubicle containing such items on the outside of a closed container. Moreover,
In this conventional gas-insulated switchgear, the circuit breaker is arranged vertically so that the movable side with the movable contact is located at the upper part, and the operating device in the cubicle is connected to the circuit breaker through a link mechanism located at the top of the circuit breaker. It was designed to be opened and closed by the

0003

[Problems to be Solved by the Invention] Conventional gas-insulated switchgears have a structure in which the movable side of the circuit breaker is driven upward as described above, so the upper part of the circuit breaker has a link mechanism and nearby fixed parts. There is a support mechanism etc. that supports this, which makes it difficult to increase the capacity. In other words, gas circuit breakers and vacuum circuit breakers are used to downsize circuit breakers, but in the case of vacuum circuit breakers, for example, the vacuum as an insulating medium acts as a heat insulating layer and cannot dissipate heat by itself. For,
There is a limit to the current that can be applied. To solve this problem, it is generally considered to dissipate heat to the outside via the conductor connected to the contact, but as mentioned above, there is a link mechanism, support mechanism, etc. in the upper part of the circuit breaker. This created an obstacle to heat dissipation, and as a result, it was difficult to increase the capacity.

An object of the present invention is to provide a gas insulated switchgear which can increase the capacity of the circuit breaker by increasing its cooling effect.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention has a movable part of the disconnection section located at the lower part of the bus side disconnector having one end connected to the main bus conductor, on the side opposite to the main bus conductor. A closed container containing a vertical circuit breaker and filled with an insulating gas is provided, and the circuit breaker is disposed above the container facing the upper wall of the closed container with a gas space interposed therebetween. The present invention is characterized in that a cubicle housing the circuit breaker operating device is configured on the back side of the side wall of the closed container located laterally.

[0006]

[Function] The gas insulated switchgear according to the present invention has the operating device for the circuit breaker on the back side of the circuit breaker and the circuit breaker is placed with the movable part of the circuit breaker at the bottom. By removing the link mechanism and other equipment, the upper part of the circuit breaker can be made into a gas space, and the heat generated from the circuit breaker is transmitted to the nearby conductor connected to the contact, and the upper part of the circuit breaker is made into a gas space. Since the current can be transmitted to the insulating gas and dissipated using the convection of the insulating gas, it is possible to increase the applied current and increase the capacity.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional front view of a gas insulated switchgear according to an embodiment of the present invention. The main busbars 4 and 5 are arranged vertically and substantially horizontally, and are constructed by supporting main busbar conductors 10 for three phases by post spacers 15 in a mainbusbar container 29. The main bus container 29 is connected to the disconnector container 30 of the main bus-side disconnector 3 via an insulating spacer 23 , and the opposite side of the disconnector container 30 to the main busbar is hermetically sealed by the insulating spacer 22 . As shown in FIG. 2, which is a partially cutaway plan view of FIG. 1, the center conductors for the three phases of the insulating spacer 23 are connected to the main bus conductors 10 for the three phases via branch bus conductors 26, and Inside the disconnector container 30, it is connected to the stator 27. A movable element 28 is provided opposite to the stator 27, and this movable element 28 is led out of the disconnector container 30 by a link mechanism 31 having an insulating rod, and is further provided on the outside side of the disconnector container 30. It is connected to an operating device 19a, which will be described later, by a link.
Opening and closing operations of the movable element 28 are performed by this operating device 19a. The left end of the center conductor of the insulating spacer 22 is always electrically connected to the movable element 28 to allow its rotation. The configurations of the main bus 5 and the main bus-side disconnect 2 are also completely similar. Main bus bars 4, 5 and main bus side disconnector 2,
An airtight container 32 is disposed below the main bus line disconnectors 2 and 3, and a vertical portion 32a of the airtight container 32 is formed on the side opposite to the main bus line of the main bus side disconnectors 2 and 3, and is connected to both of the disconnector containers. ing. In each of the containers 29, 30, 32 mentioned above, there are, for example, 2
It is filled with an insulating gas such as SF6 gas at a pressure of kg/cm2G or less.

A part of the side walls 24 forming the closed container 32 are always connected in an airtight manner, but can be taken out to the right in FIG. An insulating case 12 is attached to the inner surface of the airtight container 32 in the side wall 24, and circuit breakers 1 for three phases arranged in parallel in the axial direction of the main bus conductor 10 are attached to this insulating case 12. This circuit breaker 1 is of a vertical type, and a movable part of the circuit breaker having a movable contact is located on the lower side. Further, a circuit breaker operating device 18 is attached to the back side of the side wall 24, and this operating device 18 is connected to the movable portion of the circuit breaker 1 via a link mechanism 33 disposed below the circuit breaker 1. In this way, circuit breaker 1
The upper portion is disposed opposite to the upper wall of the closed container 32 via the gas space of the vertical portion 32a of the closed container 32. As shown in FIG. 2, vertical conductors 11 are arranged almost vertically in the vertical portion 32a for each phase, and their upper ends are connected to the movers of the main bus-side disconnectors 2 and 3 via the center conductor of the insulating spacer 22. 28, and its lower end is connected to the upper terminal of the circuit breaker 1 via a clip-type current collector 14. One end of a connecting conductor 16 is connected to the lower terminal of the circuit breaker 1 via a tube current collector 13, and the other end of the connecting conductor 16 is connected to a plurality of cable heads 7 depending on its current capacity. The cable is guided out of the closed container 32 by a cable. This connecting conductor 16 is supported and fixed at an appropriate position in the closed container 32 by a post spacer 34, and has a through-type current transformer 6 in the middle thereof. Therefore, when the circuit breaker 1 is pulled out together with the side wall 24 to the right in FIG.
At the same time, when the circuit breaker 1 is inserted into the closed container 32 side, the circuit breaker 1 completes electrical contact with the clip type current collector 14 and the tulip type current collector 13.

A cubicle 17 is formed on the back side of the side wall 24 of the airtight container 32.
The operating device 18 for the circuit breaker 1 described above, the operating devices 19a and 19b for the main bus disconnect diagrams 2 and 3 shown in FIG. 3 which is a side view of FIG. 1, and the operating devices 19a and 19b for the earthing switches 8 and 9 operating device 2
0, 21, and further a pressure gauge (not shown) for monitoring the gas pressure inside each container 29, 30, 32. This earthing switch 8 is for grounding the lower terminal side of the circuit breaker 1, and is for connecting the conductor 3 connecting between the connecting conductor 16 and the cable head 7.
5, and the earthing switch 9 is configured to be able to contact the circuit breaker 1.
The upper terminal side of the terminal is grounded, and is configured to be able to contact the upper end of the vertical conductor 11, and is opened and closed by operating devices 20 and 21 via link mechanisms (not shown), respectively.

Inspection of the main bus 4 is performed by opening the main bus side disconnector 3, collecting the insulating gas in the bus container 29, and removing the inspection cover 29a of the bus container 29 shown in FIG. At this time, if the main bus side disconnector 2 is closed, the main bus 5
Operation can be continued using To inspect the feed-through current transformer 6 and cable head 7, open the main bus-side disconnectors 2 and 3, turn on the grounding switch 8, ground the connecting conductor 16, and collect the insulating gas inside the closed container 32. Then, the inspection cover 25 of the closed container 32 is removed. Furthermore, to inspect the circuit breaker 1, after opening the main bus side disconnectors 2 and 3, turn on the grounding switches 8 and 9, collect the insulating gas in the closed container 32, and remove the disconnected side wall 24 as shown in the figure. This is done by pulling it out to the right.

[0011] Furthermore, the heat generated by the circuit breaker 1 in the operating state is as follows:
The gas is transmitted to the conductor existing near the upper terminal and the vertical conductor 11, and since there is a gas space especially in the upper part of the circuit breaker 1, and the link mechanism 33 is provided below the circuit breaker 1, the vertical part 32a It is well dissipated by the convection of the insulating gas inside. Further, the insulating case 12 that supports the circuit breaker 1 while electrically insulating it from the closed container 32 is formed in a shape that communicates the vicinity of the upper terminal of the circuit breaker 1 with the gas space within the vertical portion 32a. For example, if the insulating case 12 is configured such that three phases are integrally formed on the side wall 24 side and a substantially vertical plate-shaped portion is located between the three-phase circuit breakers, the insulation case 12 is configured such that a nearly vertical plate-shaped portion is located between the three-phase circuit breakers. The vicinity of the upper terminal of the vessel 1 is opened to the vertical portion 32a side, thereby contributing to the formation of convection of the insulating gas in the vertical portion 32a. Moreover, the circuit breaker 1 is arranged in a part of the closed container 32 located below the main bus bars 4 and 5, and the connection with the main bus side disconnectors 2 and 3 on the side opposite to the main bus bar is a vertical conductor arranged almost vertically. 11
Since the width of the vertical portion 32a is narrowed, the width of the entire gas insulated switchgear can be narrowed.

FIG. 4 is a longitudinal sectional front view of a gas insulated switchgear according to another embodiment of the present invention. In this embodiment, circuit breaker 1
Both the upper terminal and the lower terminal are connected to the vertical conductor 11 and the connecting conductor 16 using the tube type collector 1.
3, and by making the width of the vertical part 32a larger than that shown in FIG. A gas space with fewer components than in the case of FIG. 1 is formed. Therefore, heat generated by the current flowing through the circuit breaker 1 is dissipated more efficiently by convection in the gas space within the vertical portion 32a. Further, this embodiment shows a case in which one cable head 7 per phase can handle the current, and the feedthrough current transformer 6 is provided outside the closed container 32 to surround the cable 37. According to such a configuration, the main busbars 4, 5
can be placed closer to the installation surface than in the embodiment shown in FIG. In the embodiment shown in FIG. 1, the main bus bars 4 and 5 are supported on the installation surface via the closed container 32, but in this embodiment, the width of the closed container 32 is reduced and the support legs 36 are used to support the main bus bars 4 and 5 on the installation surface. is supported on the installation surface. Since the configuration of other parts is the same as that of the embodiment shown in FIG. 1, the same reference numerals are given to the equivalent parts and the description thereof will be omitted.

According to this embodiment, the circuit breaker 1 is disposed on the vertical portion 32a of the closed container 32, and its upper terminal is at approximately the same height as the main bus-side disconnector 2 and the main bus 5. , it becomes possible to connect between the opposite main bus side of the main bus side disconnector 2 and the upper terminal with the tulip type collector 13, and when the side wall 24 is removed, the tulip type collector 1 can be connected.
3 can be easily separated. In addition, since the vertical conductor 11 disposed in the vertical portion 32a is biased toward the side opposite to the side wall 24, a sufficient gas space is obtained above the circuit breaker 1, and a further cooling effect due to convection of the insulating gas can be expected. Can be done.

FIG. 5 is a longitudinal sectional front view showing a gas insulated switchgear according to still another embodiment of the present invention. While the previous embodiment was a double main bus system having two main bus bars 4 and 5, this embodiment is a single bus system using only the main bus 4. The main bus 4 and the main bus side disconnector 3 are separated by an insulating spacer 22
The mover 28 of the main bus side disconnector 3 is connected to the ground terminal 38 at the disconnection position by the operating device 19a or at a further overstroke position. It is constructed so as to be in contact with each other so that it also serves as a grounding switch 9. A connecting conductor 16 similar to that of the previous embodiment is disposed in a sealed container 32 connected to a main bus container 29 via an insulating spacer 22.
A disconnector 39 is constructed in the middle of the line 6. This disconnector 39
The movable member 40 is opened and closed by an operating device 19b disposed in parallel to the operating device 19a in the cubicle 17 shown in FIG. Disconnector 3
It also constitutes a grounding switch for grounding the circuit breaker 1 side of circuit breaker 9. The circuit breaker 1 inside the closed container 32 is connected to the side wall 2 of the closed container 32.
4 via an insulating case 12, and is arranged vertically, with a link mechanism 33 connected to its lower side, and opened and closed by an operating device 18 configured on the back side of the side wall 24. . Therefore, there is no link mechanism on the upper side of the circuit breaker 1, and the circuit breaker 1 faces the upper wall of the closed container 32 with a gas space interposed therebetween. This circuit breaker 1 can be installed at any height, but in this embodiment it is installed at almost the same height as the main bus 4, and its upper and lower terminals are connected by tube-type current collectors 13. As in the previous embodiment, by moving the side wall 24 to the right, electrical contact at the tube type current collector 13 is broken, so that the circuit breaker 1 can be pulled out from the cubicle side.

In this embodiment as well, the circuit breaker 1 is opened and closed by the operating device 18 via the link mechanism 33 provided on the lower side, and the upper side is connected to the closed container via the gas space of the vertical portion 32a. 32, the heat generated from the circuit breaker 1 is dissipated by convection using the insulating gas within the vertical portion 32a. In addition, since the upper terminal of the circuit breaker 1 is at almost the same height as the main bus 4 and the main bus-side disconnector, it is possible to connect the upper terminal and the side opposite to the main bus of the main bus-side disconnector 3 with the tulip type collector 13. ,
By moving the side wall 24 in its removal direction, the electrical connection by the tube current collector 13 can be easily separated. However, if the circuit breaker 1 is located below the main bus bar 4, although the above-mentioned effect is lost, the gas space above the circuit breaker 1 can be effectively used for forming convection of the insulating gas, and the vertical By narrowing the width of the portion 32a, the entire insulated switchgear can be reduced in the width direction.

In each of the embodiments described above, the circuit breaker 1 is supported inside the airtight container 32 of the side wall 24, and the operating device 18 is attached to the cubicle 17 side of this side wall 24. Although the circuit breaker 1 can be pulled out for inspection, etc., the side wall 24 may be integrated with the closed container 32 if a separate method for inspecting the circuit breaker 1 is considered.

[0017]

[Effects of the Invention] As explained above, according to the present invention, a vertical circuit breaker is provided in which the movable part of the circuit breaker is located below,
This circuit breaker is placed so as to face the upper wall of a sealed container with a vertical section above it, which facilitates the convection of insulating gas in the vertical section, thereby dissipating the heat of the circuit breaker and allowing current to flow. By increasing the current, it is possible to increase the capacity of the gas insulated switchgear.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a gas insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a longitudinal sectional front view of a gas insulated switchgear according to another embodiment of the present invention.

FIG. 5 is a longitudinal sectional front view of a gas insulated switchgear according to still another embodiment of the present invention.

[Explanation of symbols]

1　Breaker 2, 3 Main bus side disconnect switch 4,5　Main bus line 11 Vertical conductor 12 Insulation case 18 Operation device 24 Side wall 32 Sealed container 32a Vertical part 33 Link mechanism

Claims (7)

[Claims] Claim 1: It has a main bus bar and a main bus side disconnector arranged almost horizontally, and a vertical circuit breaker is connected to the side opposite to the main bus bar of the main bus side disconnector, and is filled with insulating gas. In the gas-insulated switchgear, the gas-insulated switchgear has a cubicle in which the circuit breaker is housed in a sealed container and an operating device connected to the movable part of the interrupting part of the circuit breaker via a link mechanism is stored on the side of the sealed container. The airtight container has a vertical portion that is substantially perpendicular to the side opposite to the main bus of the main bus-side disconnector, and the circuit breaker has the disconnection portion and the link mechanism located at the bottom thereof, and A gas insulated sealing device, characterized in that an upper terminal side is disposed opposite to the upper wall of the sealed container via the gas space of the vertical portion. 2. The circuit breaker according to claim 1, wherein the circuit breaker is disposed below the main bus and the main bus side disconnector, and is connected to the upper terminal side of the circuit breaker and the opposite main bus of the main bus side disconnector. A gas insulated switchgear characterized in that the sides are connected by a vertical conductor arranged in the vertical part. 3. The circuit breaker according to claim 1, wherein the circuit breaker is supported on a removably provided side wall forming a part of the closed container, and the operating device is mounted on the back side of the side wall in the cubicle. A gas insulated switchgear characterized by being equipped with. 4. The circuit breaker according to claim 3, wherein the circuit breaker has an upper terminal and a lower terminal, and these terminals are connected by a current collector that is separable in the direction in which the side wall is removed. gas insulated switchgear. 5. In the device according to claim 1, the main bus bar is a double main bus bar arranged vertically, and the circuit breaker is located at approximately the same height as the main bus bar located below among the main bus bars. A gas insulated switchgear, characterized in that the gas insulated switchgear is arranged in the vertical part, and the upper terminal and the side opposite to the main bus of the main bus side disconnector are connected by a vertical conductor arranged in the vertical part. 6. The circuit breaker according to claim 5, wherein the circuit breaker has an upper terminal and a lower terminal, and is supported on a removably provided side wall forming a part of the sealed container, and is connected to the circuit breaker within the cubicle. The operating device is installed on the back side of this side wall, and the vertical conductor connecting the upper terminal of the circuit breaker and the side opposite to the main bus of the main bus side disconnector is placed at the end of the vertical section opposite to the side wall. A gas insulated switchgear, characterized in that the terminals are connected by a current collector that is separable in the direction in which the side wall is removed. 7. The device according to claim 4, wherein the main bus bar is of a single bus bar type, and the upper terminal of the circuit breaker is arranged in the vertical portion at approximately the same height as the main bus bar. Gas insulated switchgear.