JPH0636339B2 - Gas insulated switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear, and more particularly to a gas-insulated switchgear that includes a circuit breaker, a disconnector, and the like in a common container.

[Conventional technology]

A gas-insulated switchgear composed of a circuit breaker and a disconnector in a common container is disclosed, for example, in "Nisshin Denki Giho" Vol.26, NO.3 (19).
(July 1981), page 10. Where the circuit breaker is
It is configured so that a disconnector connected to both ends of the switch can be opened and the other parts can be put into a power-on state to continue the operation while performing the inspection. That is, the circuit breaker is configured as a blocking portion in the second container formed by further separating it into a gas in the common container, and a part of the circuit breaker can be pulled out from the inside of the second container.

[Problems to be solved by the invention]

Since the conventional gas-insulated switchgear has a configuration in which the stator is independently fixed to the terminal on the back side of the second container when the blocking part is formed in the second container, the blocking part from the second container is separated. Even if you pull out, the stator remains in the second container,
It was not possible to inspect the entire interrupting part such as the contact state.

An object of the present invention is to provide a gas-insulated switchgear that can be easily and safely taken out so that the entire shutoff unit can be inspected in a state in which other parts of the common container are energized.

[Means for solving problems]

The present invention, in order to achieve the above object, in a second container airtightly configured with two terminals in a common container,
The mover-side fixed part and the stator are electrically insulated by an insulator and mechanically connected, and the stator and the other terminal are connected by a pair of contacts that are separable in the drawing direction of the breaking part. , Between the mover and one terminal is placed in a parallel relationship between the large diameter part of the mover-side fixed part and one terminal in a direction parallel to the drawing direction of the blocking part and separable in the drawing direction of the blocking part It is characterized in that the blocking portion can be pulled out from the side of the second container on which the large-diameter portion is arranged by being connected by a pair of such contactors.

[Action]

Since the gas-insulated switchgear according to the present invention has the above-described configuration, when the mover is pulled out from the side where the large diameter portion of the second container is arranged, the stator can be pulled out together, so that the entire blocking portion is externally provided. The contact state can be inspected. Moreover, at that time, the portion other than the large-diameter portion of the blocking portion does not come into contact with the terminal or the like to prevent the drawer from being hindered or damaged, and can be easily and safely pulled out.

〔Example〕

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

FIG. 2 is a sectional view showing the overall structure of the gas insulated switchgear. A circuit breaker 30, which will be described in detail later, is housed in a second container 50 that is airtightly configured by the insulating cylinder 12, the support insulator 14, and the like. The circuit breaker 30 is a cylindrical common container. 5 is electrically insulated and supported by a support insulator 14. The common container 5 is filled with an insulating gas 23, and in addition to the circuit breaker 30, the line disconnector 15, the cable head 16 and the like are configured in one gas compartment. A line-side conductor 51 is introduced from the bottom plate 22 of the common container 5 by the cable head 16, the line-side conductor 51 is connected to one pole of the line disconnector 15, and the other pole of the line disconnector 15 is a circuit breaker. It is connected to the terminal 13 below 30. The upper terminal 11 of the circuit breaker 30 is connected to one pole of the busbar disconnector 2 connected to the busbar conductor 1 of the first main busbar 52. Also, the terminal 11 above the circuit breaker 30
Is connected to the upper end of the connecting conductor 10 arranged in parallel with the circuit breaker 30 in the common container 5, and the lower end of the connecting conductor 10 is connected to the bus conductor 6 of the second main bus 53. 7 is connected to one pole. Both busbar disconnectors 2,
7 is gas-separated by insulating spacers 4, 9.
It is configured outside the common container 5. In the common container 5, the connection conductor 10 is connected to the breaker 3 via the support insulator 18.
0, and one pole of the line disconnector 15 is also supported by the circuit breaker 30 by the support insulator 17. The operation quicle 21 arranged below the second main bus 53 opens and closes the circuit breaker 30, and the line disconnector 15 is operated by an unillustrated operator arranged below the common container 5, and also the circuit breaker. Ground switch 19, 20 for grounding both terminal sides of 30
Is also operated by an operating device (not shown) arranged below the common container 5.

In this type of gas-insulated switchgear, it is desirable that the busbar disconnectors 2 and 7 and the line disconnector 15 be opened so that the circuit breaker 30 can be inspected while the line-side conductor 51 is energized. This inspection is performed by, for example, the line-side conductor 51.
Is charged, the insulating gas 23 in the common container 5
Must be done without collecting. It is the configuration of the circuit breaker 30 shown in FIG. 1 that enables this inspection.

FIG. 1 shows only the circuit breaker 30 of FIG. 2 in a vertical cross section. One end of the support insulator 14 is hermetically connected to the bottom plate 22 of the container 4, and the other end of the support insulator 14 is an annular terminal. It is airtightly connected to the lower end of the insulating cylinder 12 via 13, and the other end of the support insulator 14 is airtightly connected to the lower end of the insulating cylinder 12 via an annular terminal 13. The upper end of the insulating cylinder 12 is the terminal 11 of the end cover.
And the lower end of the support insulator 14 is sealed by a mechanism case 42 that is detachably sealed from the lower surface side of the bottom plate 22. In this way, the second container 50 that is airtight as a whole and has substantially the same inner diameter is formed, and when the circuit breaker 30 is a gas circuit breaker, the arc-extinguishing gas 43 is sealed inside and the interior of the common container 5 is different. It forms a partitioned gas space.

A circuit breaker is configured in the second container 50. Specifically, the terminal 11 and the stator 32 are electrically connected by a separable contactor 31 provided on a straight line parallel to the pulling-out direction of the blocking portion, which will be described later, and the both are in the above-mentioned linear direction. Separated by the movement of the stator 32 to. Stator 32
The movable element 34 facing each other, the nozzle 33 surrounding the contact portions, and the buffer cylinder 35 are connected to the insulating operation rod 40 to form a movable portion of the blocking portion. This movable part is the piston 3 fitted in the buffer cylinder 35.
The piston 37 is guided and supported by 7, and is supported and fixed to a piston fixing base forming a large-diameter portion 38 of the cutoff portion to form a movable side fixed portion. The large-diameter portion 38 is electrically connected to the mover 34 and to the inner surface of the terminal 13 via a contact 39, and the contact 39 is arranged parallel to the pulling-out direction of the cutoff portion. The large-diameter portion 38 is supported by either one of the portion 38 and the terminal 13 and is allowed to slide downward. Further, the lower end of the rod-shaped insulator 36 is fixed to the large-diameter portion 38, and the upper end of the insulator 36 is attached to the support plate 54 to which the stator 32 is attached, thus electrically connecting the large-diameter portion 38 and the stator 32. Is mechanically connected to the insulated state. Further, the upper end of the insulating rod 44 is fixed to the lower portion of the large diameter portion 38, and the lower end of the insulating rod 44 is fixed to the upper surface of the mechanism case 42 through the opening of the bottom plate 22. The mechanism case 42 is provided with a link 55 connected to the insulating operation rod 40, and the rotary shaft of the link 55 keeps airtightness. The outer side of the mechanism case 42 of the rotary shaft is connected to the operating device in the operating couicle 21 shown in FIG. 2, and this operating device moves the insulating operation rod 40 up and down via the link 55 to move the mover 34 to the stator. It is operated to be separated from 32 or to be brought into contact with the stator 32. The mechanism case 42 is detachably connected to the bottom plate 22 with bolts 45 while keeping airtightness.

Since the circuit breaker 30 has the above-described configuration, when taking out only the circuit breaker out of the common container 5 for inspection or the like, first, the connection between the operation cuvicle 21 and the link 55 is released, and the inside of the second container 50 is broken. After collecting only the arc extinguishing gas of
5 is removed, and the mechanism case 42 is lowered downward by a hydraulic jack or the like. Then, the blocking portion includes the insulating rod 44, the large diameter portion 38,
Since it is mechanically integrated by the insulator 36, etc.,
The whole can be pulled out from the opening of the bottom plate 22. At this time, since the large-diameter portion 38 is electrically contacted with the terminal 13, the other portion of the blocking portion does not come into contact with the terminal 13 or the like and the drawer is not hindered or damaged. In addition, since the stator 32 is also integrated with the fixed portion on the same side that supports the movable side by the insulator 36, it is separated by the contactor 31 and the entire blocking portion can be taken out. Therefore, the cut-off portion taken out is not only for inspecting the damaged state of both contacts 32, 33,
It is possible to perform inspection work for the entire blocking unit, such as inspection of the contact state between the contactors 32, 34.

FIG. 3 shows only the circuit breaker 30 according to another embodiment of the present invention.

The circuit breaker 30 is used for the gas insulated switchgear of FIG. 1 as in the case of FIG. The second container 50 of the circuit breaker housed in the common container 5 has a mechanism case 42, a support insulator 14, an annular terminal 13, an insulating cylinder 12, and an end-capped terminal 11 as in the previous embodiment. Is airtightly constructed from. The shut-off portion arranged so as to be taken out into the second container 50 is a vacuum valve 47 for a vacuum circuit breaker, and the stator 32 and the terminal 11 are separated by a contact 31 provided on a straight line in the drawing direction. Possible to be electrically connected. Further, the mover 33 is electrically connected to a large-diameter portion 38, which is a mover-side fixed portion whose details are omitted, and the large-diameter portion 38 is detachably connected to the terminal 13 via a contact 39.
Since other configurations are the same as those in FIG. 2, corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

Since the vacuum valve 47 has the stator 32 and the mover 34 arranged in an insulator vacuum container 56 such as a ceramic in order to keep the inside vacuum, the insulator vacuum container 56 corresponding to the insulator 36 is used. The stator 32 is mechanically connected to the fixed portion on the mover 34 side while being electrically insulated. Therefore, like the previous embodiment, the blocking portion can be pulled out from the inside of the second container 50 while separating the entire blocking portion by the contactor 31 and the contactor 39. At this time, the mover 34
Since the large diameter portion 38 makes electrical contact with the terminal 13 on the side, even if the blocking portion is pulled out downward in the drawing, other portions do not interfere with the terminal 13 or the like and prevent the pulling out. .
Generally, in the case of the vacuum valve 47, the largest diameter is the end cover that seals both ends of the insulating vacuum container 56 in the axial direction.
Since the end cover portion on the mover side is the large diameter portion 38, the large diameter portion 38 can be easily obtained. Further, since the second easy 50 is airtightly configured, it is not necessary to collect the insulating gas 23 in the common container 5 shown in FIG. 2 only by recovering the gas in the second container 50. As in the previous embodiment, the line disconnector 15 shown in FIG. 1 can be opened to put the line-side conductor 51 in an electrically charged state to continue the operation.

In this way, also in this embodiment, since the entire blocking section can be pulled out, it is possible to inspect the entire blocking section such as the contact state.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in the second container airtightly configured with two terminals in the common container, the mover-side fixed portion and the stator are electrically insulated from each other by the insulator. Mechanically connected, the stator and the other terminal are connected by a pair of contacts that can be separated in the pulling direction of the shutoff section, and the mover and one terminal are connected to each other by a large-diameter section of the mover-side fixed section. And one of the terminals are connected to each other by a pair of contacts arranged in a positional relationship parallel to each other with respect to the drawing direction of the breaking section and separable in the drawing direction of the breaking section, and the breaking section is connected to the above-mentioned second container. Since it can be pulled out from the large-diameter portion arrangement side, it is possible to pull out the whole interruption part to the outside while keeping a part of the common container in a charged state, and it is possible to inspect the whole interruption part. In addition, at that time, the portion other than the large-diameter portion of the blocking portion does not come into contact with the terminal or the like to hinder or damage the drawer, and the drawer can be pulled out easily and safely.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a circuit breaker which is a main part of a gas insulated switchgear according to an embodiment of the present invention, FIG. 2 is a vertical sectional side view of the same gas insulated switchgear, and FIG. 3 is another view of the present invention. The longitudinal cross-sectional view of the circuit breaker which is the principal part of the gas insulated switchgear by an Example is shown. 2, 7 ... Busbar disconnecting switch, 5 ... Common container, 11 ... Terminal, 12 ... Insulating cylinder, 13 ... Terminal, 14 ... Supporting insulator, 15
...... Line disconnectors, 30 ...... breakers, 31 ...... contacts, 32 ...
… Stator, 34 …… mover, 36 …… insulator, 38 …… large diameter part, 39 …… contactor, 50 …… second container.

Claims (2)

[Claims] 1. A common container has a breaker configured with a disconnecting switch, and this breaker has a movable container in a second container airtightly formed by having two terminals in the common container. A mover operably supported by the side fixing part and electrically connected to the one terminal, and a stator facing the mover in the second container and electrically connected to the other terminal. In the gas-insulated switchgear comprising, the mover-side fixed portion and the stator are electrically insulated by an insulator and mechanically connected, and the stator and the other terminal are Connected by a pair of contacts that are separable in the drawing direction of the shutoff portion, and draw out the shutoff portion between the mover and the one terminal between the large diameter portion of the mover-side fixed portion and the one terminal. How to pull out the blocking part, which is placed in a positional relationship parallel to each other It is connected by a pair of contacts that can be separated, a gas insulated switchgear, characterized in that the blocking portion is withdrawable constructed from the large-diameter portion disposed side of the second container. 2. The device according to claim 1, wherein the shut-off portion is a vacuum valve, and the large-diameter portion is an end for sealing a mover side of an insulating vacuum container of the vacuum valve. A gas-insulated switchgear formed on the lid.