JPH07203609A - Gas insulated cubicle - Google Patents

Abstract

PURPOSE:To facilitate operations of putting a breaker into a tank and taking it out therefrom by a construction wherein the breaker, a link mechanism and an operating unit are fitted to a partition plate and the link mechanism pierces the partition plate airtightly and transmits an on-off driving force. CONSTITUTION:An SF6 gas filled tank 40 is provided inside a switchboard 41. An opening part 39 is closed up by a partition plate 22 and a breaker 21 is fitted on the inside-tank side of the partition plate 22, while an operating unit 20 is fitted on the outside-tank side thereof. The upper end of the breaker 21 is connected to a breaker 25 through a contact 33 and a conductor 31 supported by an insulator 32 and the lower end thereof is also connected to a breaker 26 through a contact 33 and a conductor 31. The breakers 21, 25 and 26, a lightning arrestor 30, a grounding switch 24, etc., are disposed in such a manner that three of them are arranged in the depth direction inside the tank 40, and each of them is connected to a main bus 27, while the three breakers 21 are driven to be on or off simultaneously by one operating unit 20. A high-voltage charging part is insulated entirely by an SF6 gas. As the result, the breakers can be put in and taken out with ease.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated cubicle in which a tank containing SF ₆ gas is provided in a switchboard, and a high-voltage charging unit such as a circuit breaker is housed in the tank.

[0002]

The high-pressure charging of the Related Art Electrical equipment, since those who placed the SF ₆ gas becomes compact, SF ₆ in the switchboard
A gas-filled tank may be provided. FIG. 5 is a partially crushed side view showing the structure of a conventional gas-insulated cubicle, and is a view of the internal structure of a crushed side plate on the front side of the switchboard 1. Inside the switchboard 1, a tank 2 containing SF ₆ gas is provided. A circuit breaker 6 is provided in the tank 2.
Is accommodated, the upper end is connected to the current transformer 7 outside the tank 2 via the flexible conductor 5, and is drawn out to the outside of the switchboard 1 via the cable 8 supported by the support 9.

Further, in FIG. 5, the circuit breaker 6 inside the tank 1 and the operating device 3 outside the tank 2 are connected via a link mechanism 4. The link mechanism 4 includes an operation lever 4A connected to the operation device 3, a conversion lever 4B that rotates around a fulcrum 4D, and an operation rod 4C connected to the breaker 6. The link mechanism 4 transmits the opening / closing driving force output from the operating device 3 to the circuit breaker 6. The lower end of the circuit breaker 6 is connected via a grounding switch 12 to a three-phase main circuit bus 10 that runs vertically on the paper surface. Reference numeral 11 denotes an operation device for the ground switch 12, which is arranged outside the tank 2. Further, 13 is a ground terminal.

In FIG. 5, a circuit breaker 6 and a ground switch 12 are provided.
Are arranged side by side in the depth direction of the paper in the tank 2, each of which is connected to the main bus 10, and one operating device 3 simultaneously opens and closes three circuit breakers 6. Also, what is written in dotted line is tank 2
It is shown that it is housed inside and is insulated by all SF ₆ gas. On the other hand, the space medium between the switchboard 1 and the tank 2 is air. That is, the high-voltage charging unit such as the circuit breaker 6 and the grounding switch 12 is housed in the tank 2 so that the entire switchboard 1 is compact.

[0005]

However, the conventional device as described above has a problem that it takes a lot of time and labor for the visual inspection or the replacement work of the circuit breaker.
That is, since the circuit breaker is housed in the tank, the circuit breaker must be temporarily pulled out of the tank for visual inspection or replacement. In the conventional device, the link mechanism and the circuit breaker had to be completely disassembled and then pulled out from the upper manhole. Further, after the inspection and replacement of the circuit breaker, it was necessary to reassemble the link mechanism and the circuit breaker into the original configuration.

Therefore, disassembling work and assembling work take a lot of time and labor, resulting in high cost. Further, it was very difficult to visually check the assembled state of the circuit breaker in the tank, which was very uncertain from the viewpoint of reliability.
An object of the present invention is to facilitate the work of putting the circuit breaker in and out of the tank.

[0007]

To achieve the above object, according to the present invention, a circuit breaker housed in a tank filled with SF ₆ gas and an operating device provided outside the tank are provided. In the case where the opening and closing drive force output from the operating device is transmitted to the circuit breaker through the link mechanism connected by the link mechanism that penetrates the wall in an airtight manner, the opening provided in the tank wall is airtight by the partition plate It is preferable that the partition plate is detachably closed, and the partition plate is provided with a circuit breaker, a link mechanism, and an operating device, and the link mechanism hermetically penetrates the partition plate to transmit the opening / closing driving force.

Further, in such a construction, it is preferable that a mounting hole is formed in the partition plate, and a screw penetrates the mounting hole and is fitted into a screw hole provided on the tank wall side. Further, in such a configuration, three breakers may be attached to one partition plate.

[0009]

According to the structure of the present invention, the opening of the tank is hermetically and detachably closed by the partition plate. Three types of circuit breaker, link mechanism, and operating device are attached to this partition plate, and the link mechanism operates by hermetically penetrating the partition plate. If only the partition plate is removed from the tank, the circuit breaker together with the link mechanism and the actuator will be pulled out of the tank, and there is no need to disassemble the device. 3 above
Since the models are integrated, it is only necessary to attach the partition plate to the tank when assembling. Therefore, the work of putting the circuit breaker in and out of the tank becomes very easy.

Further, in such a structure, the partition plate is attached to the tank wall with a screw, so that the partition plate and the tank wall can be attached and detached. Further, in such a configuration, since three circuit breakers are attached to one partition plate, the three phases can be integrated and the device becomes compact.

[0011]

EXAMPLES The present invention will be described below based on examples. FIG. 1 is a partially crushed side view showing the structure of a gas-insulated cubicle according to an embodiment of the present invention, and is a view of the internal structure when the front side plate is crushed. Switchboard 41
A tank 40 filled with SF ₆ gas is provided inside. An opening 39 is provided in the tank 40, and the opening 3
9 is closed by a partition plate 22. The breaker 21 is attached to the inside of the tank 40 of the partition plate 22, and the operating device 21 is attached to the outside of the tank 40. The upper end of the circuit breaker 21 has a conductor 3 supported by a contact 33 and an insulator 32.
1 to the circuit breaker 25, and the lower end of the circuit breaker 21 is also connected to the circuit breaker 26 via the contact 33 and the conductor 31. The insulator 32 is attached to the tank 40 via a support (not shown). Disconnector 25,
In FIG. 26, the movable contacts operate in the directions of arrows 25B and 26B, respectively.
It is located outside 0.

Further, in FIG. 1, the lower disconnector 26 penetrates the tank 40 and runs perpendicularly to the plane of the drawing.
Connected to 7. On the other hand, the upper disconnector 25 is connected to the lightning arrester 30 and also to the ground switch 24. The grounding switch 24 has a movable blade with an arrow 24B.
The operation device 24A is located outside the tank 40. The grounding side of the grounding switch 24 is the grounding bushing 23.
It is led out to the outside of the tank 40 via the and is connected to a ground wire (not shown) in the switchboard 41. The disconnector 25 is
Further, it is drawn out of the tank 40 via the conductor 31, connected to the current transformer 29 in the switchboard 41, and further drawn out of the switchboard 41 via the cable 28.

In FIG. 1, a circuit breaker 21 and a disconnector 25,
26, the lightning arrester 30, the grounding switch 24, etc.
Inside, three units are arranged side by side in the depth direction of the paper, each of which is connected to the main bus 27, and at the same time, one operating unit 20 simultaneously opens and closes three circuit breakers 21.
Further, the space shown by dots is a portion filled with SF ₆ gas, and all the high-voltage charging parts are insulated by SF ₆ gas.

FIG. 2 is an enlarged side view of the main part of the circuit breaker shown in FIG. 1 in an enlarged manner. The partition plate 22 is attached to the tank 40 by screws 47 via packing 48. The circuit breaker 21 is fixed to the partition plate 22 by an attaching screw 44A via an insulating frame 44. The insulating frame 44 is an insulating case having an opening on the left side, which houses the circuit breaker 21 and also has an upper case 43.
Is supporting.

FIG. 3 is an enlarged cross-sectional view of an essential part showing an enlarged view around the circuit breaker of FIG. The operating device 20 is the mounting screw 20.
It is fixed to the partition plate 22 via A and is covered with a cover 38. The circuit breaker 21 and the operating device 20 are connected via a link mechanism 45. Link mechanism 45
Is an operating rod 45A from the circuit breaker 21 side, a conversion lever 45B that rotates around a fulcrum 46, a drive rod 45C that penetrates the partition plate 22 in an airtight manner, a conversion lever 45D that rotates around a fulcrum 46, and a spring. 45E and an operating lever 45F connected to the operating device 20, and the opening / closing driving force of the operating device 20 is transmitted to the circuit breaker 21. In addition,
A fulcrum 46 of the conversion lever 45 is supported by an ear 44B formed on the insulating frame 44.

Further, in FIG. 3, the lower end of the circuit breaker 21 is connected to the lower contact 33 via the conductor 31, and the upper end of the circuit breaker 21 is connected to the upper contact 33 via the flexible conductor 31A. . The upper frame 43 supports the upper contact 33 and the upper part of the circuit breaker 21, and covers the SF ₆ gas side of the link mechanism 45. The support 43 is for keeping the gap size between the contacts 33 at a constant value, and the contacts 33 are securely fitted to the mating conductors in the tank 40.

In FIG. 3, if the screw 47 is removed, the partition plate 22 can be pulled out to the outside on the right side of the tank 40 by integrating the operating device 20, the link mechanism 45 and the circuit breaker 21. As shown in FIG. 1, a door 41A is provided on the right side of the switchboard 41.
Therefore, the breaker 21 can be put out of the switchboard 41 for inspection or replacement. When assembling, the process opposite to the drawing is followed, the contact 33 is fitted into the inside of the tank 40 with the mating conductor 31, and then the partition plate 22 is attached to the tank 40 with the screw 47.

FIG. 4 is a view on arrow A of FIG. However,
The tank wall is shown omitted. The circuit breakers 21 are arranged side by side for three phases, and are attached to the partition plate 22 via the insulating frame 44 by four attachment screws 44A. As described above, the three circuit breakers 21 hermetically penetrate the partition plate 22 through the conversion lever 45B and the drive rod 45C of the link mechanism, and are opened and closed by one operating device. By arranging the three circuit breakers 21 on one partition plate 22, the entire apparatus becomes compact. A plurality of mounting holes 47A are formed around the partition plate 22, and screws (47 in FIG. 3) penetrate the mounting holes 47A and the tank 4
It is fitted in the screw hole provided in the wall of 0. Further, the packing 48 is arranged in a ring shape on the inner peripheral side of the mounting hole 47A to keep the tank 40 airtight.

[0019]

As described above, according to the present invention, the opening of the tank is hermetically and detachably closed by the partition plate, and three types of circuit breaker, link mechanism and operating device are attached to the partition plate. The breakers have become much easier to put in and out, so the inspection and replacement time and labor have been greatly reduced, and work costs have been saved. Also, the reliability of the device is improved.

Further, in this structure, since the partition plate is attached to the tank wall with the screw, the partition plate and the tank wall can be attached to and detached from each other. Further, in such a configuration, since three circuit breakers are attached to one partition plate, the three phases can be integrated and the entire device becomes very compact.

[Brief description of drawings]

FIG. 1 is a partially crushed side view showing a configuration of a gas-insulated cubicle according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of an essential part showing an enlarged view around the circuit breaker of FIG.

FIG. 3 is an enlarged sectional view of an essential part showing an enlarged view around the circuit breaker of FIG. 1.

FIG. 4 is a view on arrow A of FIG.

FIG. 5: Partially crushed side view showing the structure of a conventional gas-insulated cubicle

[Explanation of symbols]

1, 21: circuit breaker, 3, 20: operating device, 4, 45: link mechanism, 22: partition plate, 2, 40: tank, 1, 4
1: Switchboard, 39: Opening, 47A: Mounting hole, 47: Screw

Claims (3)

[Claims] 1. A circuit breaker housed in a tank filled with SF ₆ gas and an operating device provided outside the tank are connected by a link mechanism that penetrates the tank wall in an airtight manner, and output from the operating device. When the opening / closing driving force is transmitted to a circuit breaker via a link mechanism, an opening provided in the tank wall is airtightly and detachably closed by a partition plate, and the partition plate and the circuit breaker are connected to each other. A gas-insulated cubicle, characterized in that a link mechanism is hermetically penetrated through the partition plate to transmit the opening / closing drive force. 2. A gas-insulated cubicle characterized in that a mounting hole is formed in a partition plate, and a screw penetrates the mounting hole and is fitted into a screw hole provided on the tank wall side. 3. The method according to claim 1 or 2, wherein 3
A gas-insulated cubicle, characterized in that the circuit breaker of the stand is attached to one partition plate.