JPH0213526B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conductor connection device for gas-insulated switchgear, and more specifically, it connects a main conductor and a lead-out conductor perpendicular to the axial direction of the main conductor. This invention relates to a conductor connection device in a grounded tank type gas insulated switchgear equipped with a connection conductor.

Conventionally, there has been a device of this type as shown in FIG. 1a. In the figure, a hollow connecting conductor 3 is supported by an insulating support 2 attached to an end inside a closed tank 1, and a shield 4 is provided surrounding the connecting conductor 3. One end of the main conductor 5 is coupled and connected to the connection conductor 3 and extends in the axial direction of the sealed tank 1 . A contactor 8 and a shield 9 covering the contactor 8 are supported on the current-carrying adapter 6 which is attached to the connection conductor 3 with a bolt 7 in a direction perpendicular to the axial direction of the main conductor 5.
A lead-out conductor 10 that is in sliding contact with the main conductor 5 is configured to extend in a direction perpendicular to the axial direction of the main conductor 5 and conduct electricity. The lead-out conductor 10 is coupled to a suitable coupling portion (not shown) at its upper end. 1
1 is a branch pipe formed to surround the extraction conductor 10.

Conventional conductor connection devices are configured as described above, and when parts inside the sealed tank 1 are to be removed from the sealed tank 1 for reasons such as modification of the gas insulated switchgear, the following procedure is used. . That is, the upper end of the lead-out conductor 10 is uncoupled, and then the first
As shown in FIG. b, the lead-out conductor 10 is moved upward to a position where there is an appropriate gap l between its lower end and the upper end of the shield 9. Then sealed tank 1
After uncoupling the internal parts from the sealed tank,
These parts were extracted in the axial direction of the sealed tank 1. Also, when extracting parts other than the drawer conductor 10, such as the connecting conductor 3, from the sealed tank 1,
It was necessary to disassemble the lead-out conductor 10 and the parts connected to its upper part. For example, in the case of a single-piece gas circuit breaker, such conventional equipment requires disassembly work to include the bushing of the air drawer and the connection to the overhead wire attached to the air conductor above the bushing, making it extremely difficult to work. It had a bad structure. In addition, in the case of system equipment such as gas-insulated switchgear, more parts are disassembled in order to disconnect the drawer conductor 10 from the upper joint than in the case of the single-piece gas circuit breaker. This has the disadvantage that the workability becomes worse.

The present invention has been made in view of the above circumstances, and allows parts inside a sealed tank other than the lead-out conductor to be removed from the closed tank without disassembling the lead-out conductor and the connecting portion at its upper end. The object of the present invention is to provide a conductor connection device for a gas insulated switchgear with improved workability.

Another object of the invention is to provide a manhole in the sealed tank on the opposite side of the lead-out conductor with respect to the axis of the main conductor, to form a hole in the shield of the connecting conductor on the opposite side of the lead-out conductor, and to To provide a conductor connection device for a gas insulated switchgear which is structured so that an energizing adapter can be removed from a closed tank and attached to the closed tank, and which facilitates extraction of internal parts of the closed tank.

Hereinafter, this invention will be explained with reference to the drawings. Second
Figure a shows an embodiment of the present invention, in which a closed tank 1
A manhole 1a is provided at a position opposite to the lead-out conductor 10 with respect to the axis of the main conductor 5. The hollow rectangular connecting conductor 3 and its shield 4 are respectively provided with holes 3a and 4a on the manhole 1a side. The current-carrying adapter 6 is attached to the upper surface of the connecting conductor 3 with a bolt 12 that can be operated from the manhole 1a side. A notch 10a is formed in the lead-out conductor 10 at a position near the lower end. Other parts that are the same as those in FIG. 1a are designated by the same reference numerals.

With the above configuration, components in the sealed tank 1 other than the drawer conductor 10 are extracted in the following procedure. First, the manhole 1a provided in the sealed tank 1 is opened, and the shield 4 and the connecting conductor 3 are opened.
Remove the bolts 12 from the holes 4a and 3a provided in the holes 4a and 3a, respectively. Then, the current-carrying adapter 6 including the contact 8 and its shield 9 is moved upward along the lead-out conductor 10. Here, when a downward force is applied to the current-carrying adapter 6 as shown in the figure, the position of the current-carrying adapter 6 after being moved is maintained by moving the contact end 8a of the contactor 8 as shown in FIG. 2b. To,
This is achieved by engaging the notch 10a. After this, the predetermined parts inside the hermetic tank 1 can be easily extracted from the hermetic tank 1. In this way, predetermined parts can be extracted from the lead-out conductor 10 without disassembling the joint portion. This results in a significant improvement in workability during disassembly work.

In the above embodiment, the power supply adapter 6 is configured to be movable upward in the figure, but the same effect can be obtained even if it is configured to be movable downward in the figure. FIG. 3a shows another embodiment corresponding to the latter, in which a hole 3b is provided in the upper wall of the connecting conductor 3, and the contact 8 and shield 9 of the current-carrying adapter 6 are made to protrude upward from the hole 3b. The flange 6a of the adapter 6 is attached to the lower surface of the upper wall of the connecting conductor 3 with bolts 12. Other parts that are the same as those in FIG. 2a are designated by the same reference numerals.

With the above configuration, when extracting parts, the third
The current-carrying adapter 6 located at the position indicated by the broken line in Figure b,
A predetermined component can be extracted from the sealed tank 1 by operating the bolt 12 from the manhole 1a, removing the energizing adapter 6, and moving it downward as shown by the solid line. In this case as well, the drawer conductor 10
It is easy to understand that it can be left as is.

As is clear from the above explanation, this invention
The simple configuration allows the power adapter to be easily removed and moved, which has the effect of significantly reducing the number of man-hours required for extracting components from the sealed tank.

[Brief explanation of drawings]

Fig. 1a is a longitudinal sectional view of the conventional device, Fig. 1b is a partial longitudinal sectional view for explaining the operation, Fig. 2a is a longitudinal sectional view of an embodiment of the present invention, and Fig. 2b is the same operation. FIG. 3A is a longitudinal sectional view of another embodiment, and FIG. 3B is a partial longitudinal sectional view for explaining the operation. 1... Sealed tank, 1a... Manhole, 2...
...Insulating support, 3... Connection conductor, 3a, 3b...
Hole, 4... Shield, 4a... Hole, 5... Leading conductor, 6... Current-carrying adapter, 6a... Flange, 8
...Contact, 8a...Contact end, 9...Shield, 10...Output conductor, 10a...Notch, 1
1... branch pipe, 12... bolt. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A main conductor connected to a hollow rectangular connecting conductor that is fixedly and insulatedly supported on a sealed tank and extending in the axial direction of the sealed tank, and a contact of a current-carrying adapter attached to the connecting conductor. In a conductor connection device for a gas-insulated switchgear, the conductor connection device includes a lead-out conductor that is arranged in contact with the lead-out conductor in a direction substantially perpendicular to the axial direction of the main conductor, and the manhole is provided in a position opposite to the lead-out conductor of the sealed tank. and a hole provided on the side of the connection conductor and its shield facing the draw-out conductor, and a mounting bolt for the current-carrying adapter that can be tightened and removed from the manhole and the hole. Conductor connection device for insulated switchgear.