JPH059108U - Gas insulated switchgear cable connection device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cable connection device of GIS that enables cable connection work without moving a cable connection container. [Constitution] Cable connection container 2 in which an insulating gas is enclosed
And a connection opening 19 transparently provided on the bottom plate 8 of the container 2.
And a mounting plate 20 integrally fixed to the bottom plate 8 and positioned below the opening 19 at a constant interval, and a cable 3 mounted on the mounting plate 20 and drawn from below and connected to the opening 19 through the opening 19. The cable head 9 connected to the conductor from the inside of the container 2 and a substantially cylindrical adapter container that is vertically movable below the bottom plate 8 and hermetically closes the peripheral side between the bottom plate 8 and the mounting plate 23. And 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas-insulated switchgear (hereinafter referred to as GIS) having a fixed cable head, and a cable connecting device for connecting a cable which is erected from the ground or the like to the cable head.

[0002]

[Prior Art]

 In general, a GIS having a fixed cable head, as shown in FIG. 3, for example, pulls in a cable 3 raised from the ground into a cable connection container 2 installed on a pedestal 1 and connects the cable 3 connected to this cable 3. The head is connected to the gas circuit breaker in the circuit breaker container 4 through a conductor or the like, and the circuit breaker is connected to the bus bar in the bus line 5. 6 is an operation box.

In such a GIS, the work of connecting the cable 3 to the cable head in the container 2 is indispensable, but conventionally, as shown in FIG. 4, first, as shown in FIG. After removing the container 2 from the gantry 1, raising the cable 3 from the cable pit 7 and passing it through the bottom plate 8 of the container 2, then attach the cable head 9 on the bottom plate 8 as shown in (B). Terminal processing is performed, and as shown in (C), the container 2 is installed again on the gantry 1 and the circuit breaker container 4 is connected.

In this case, the bottom plate 8 of the container 2 is configured not to move. This is because if the cable 3 is temporarily fixed to the bottom plate 8 and then the bottom plate 8 is moved, the cable 3 is pulled and the performance, This is because it may cause a problem in terms of guarantee.

[0005]

[Problems to be solved by the device]

 In the above-mentioned conventional technology, the cable connection container 2 is detached at the time of connecting the cable, but since this kind of container 2 is a heavy object, it is necessary to use a crane or the like, and for lifting the container. Ceiling hooks are especially necessary, strength is required in the building design, and not only is the cost high, but there is also the problem that it takes time to remove the container 2 and attach it after terminal treatment.

On the other hand, due to the complexization in GIS, devices other than the cable head 9 are often housed in the cable connection container 2 at the same time, and the work described below is required at the time of connecting the cable. There is a problem that causes an increase in That is, as shown in FIG. 5, when the disconnecting device such as the disconnecting switch 10 and the grounding switch 11 are housed in the container 2 at the same time, the opening / closing part is accompanied by the mounting of the container 2 after the cable connection is completed. It is necessary to perform centering of the conductor, and in addition, as shown in FIG. 6, when the operating devices 12 and 13 of the disconnecting switch 10 and the grounding switch 11 are attached to the container 2, respectively. At the time of removal, it is necessary to remove the operating devices 12, 13 or the wiring pipes 14, 15.

Further, as shown in FIG. 5, when devices such as the lightning arrester 16, the instrument transformer 17 or the power detection device 18 are attached to the container 2, these devices are removed from the container 2 or the bottom plate 8 when connecting the cables. There is a need. The present invention has been made in view of such problems of the conventional technology, and an object of the present invention is to provide a cable connecting device capable of terminating a cable without moving the cable connecting container. To provide.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the GIS cable connection device of the present invention, a cable connection container filled with an insulating gas, a connection opening penetratingly provided in the bottom plate of the container, and a bottom plate of the container are integrated. Fixed to the mounting plate located below the opening at regular intervals, connected to the cable mounted on the mounting plate and drawn from below, and connected to the conductor from inside the container through the opening. And a substantially cylindrical adapter container that is vertically movable below the bottom plate and hermetically closes the peripheral side between the bottom plate and the mounting plate.

[0009]

[Action]

 In the cable connecting device having such a configuration, when connecting the cable, first, the adapter container is moved downward to open the peripheral side between the bottom plate of the cable connecting container and the mounting plate below the mounting plate. After attaching the cable head to the top, start up the cable for terminal treatment, connect the conductor from inside the cable connection container to the cable head through the opening in the bottom plate, and then move the adapter container up. The peripheral side between the bottom plate and the mounting plate is airtightly closed, and the inside of the cable connection container and the inside of the adapter container are closed. As a result, the cable connection work can be performed only by moving the adapter container up and down.

[0010]

【Example】

 An example will be described with reference to FIGS. 1 and 2. In these drawings, the same reference numerals as those used above denote the same or corresponding ones, and reference numeral 19 denotes a circular connection opening provided in the bottom plate 8 of the cable connection container 2 through the opening 19 to be described later. A conductor from inside the container 2 is connected to the cable head 9 on the mounting plate. Reference numeral 20 denotes a circular mounting plate that is integrally fixed to the lower surface of the bottom plate 8 by using studs 21 and is positioned below the opening 19 with a constant interval, and the cable head 9 is mounted on the mounting plate 20.

Reference numeral 22 denotes a bottomed cylindrical adapter container having an inner diameter substantially equal to the outer diameter of the mounting plate 20 and having an opening 23 at the bottom, which moves vertically below the bottom plate 8 using the mounting plate 20 as a guide. When the upper surface of the adapter container 22 is in airtight contact with the bottom plate 8, the peripheral edge of the opening 23 of the adapter container 22 is in airtight contact with the mounting plate 20, and the space between the bottom plate 8 and the mounting plate 20 is freely set. Airtightly closes the peripheral side of.

In such a configuration, in order to perform the cable connection, first, as shown in FIG. 2, the adapter container 22 is lowered, and the mounting plate is used by utilizing the gap between the bottom plate 8 and the mounting plate 20. The cable head 9 is mounted on the cable 20, the cable 3 raised from the cable pit 7 is inserted through the opening 23 of the adapter container 22 and guided to the mounting plate 20, and terminal treatment is performed.

Further, the conductor from the inside of the cable connection container 2 is led out from the opening 19 and connected to the cable head 9, and then the adapter container 22 is moved upward and its upper peripheral edge is fixed to the bottom plate 8. At the same time, the peripheral edge of the opening 23 is fixed to the mounting plate 20, and as shown in FIG. 1, the peripheral side between the bottom plate 8 and the mounting plate 20 is airtightly closed by the adapter container 22, and the inside of the cable connecting container 2 is closed. Airtightly closes. After that, the container 2 is filled with an insulating gas such as SF ₆ gas. As a result, when the cable is connected, only the vertical movement of the adapter container 22 is required, and it is not necessary to remove the heavy cable connection container 2 as in the conventional case.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Since the cable connection work is performed by moving the adapter container provided below the cable connection container up and down, it is not necessary to remove the heavy cable connection container, and the cable connection work time can be greatly shortened. , The ceiling hooks for lifting containers that are usually provided are not required, and it is economical without requiring strength in building design.

Further, even when the switchgear and other devices are accommodated in the cable connection container at the same time, it is not necessary to remove the container when connecting the cable, so that the centering of the opening / closing conductor as in the conventional case is performed. Since there is no need to carry out the work, and the removal and installation of equipment and wiring is unnecessary, the work is greatly reduced, and since there is no need to attach or remove equipment locally, quality deterioration can be prevented.

[Brief description of drawings]

FIG. 1 is a cutaway front view showing an embodiment of a cable connecting device for a gas insulated switchgear according to the present invention.

FIG. 2 is a cut-away front view of the first embodiment when connecting a cable.

FIG. 3 is an external front view of a conventional gas-insulated switchgear.

FIG. 4 is a cut front view showing each step of a conventional cable connecting work.

FIG. 5 is a cut-away front view of the combined cable connection container.

6 is an external front view of FIG.

[Explanation of symbols]

 2 Cable connection container 3 Cable 8 Bottom plate 9 Cable head 19 Connection opening 20 Mounting plate 22 Adapter container

Claims (1)

[Claims for utility model registration] 1. A cable connection container in which an insulating gas is enclosed, a connection opening transparently provided in a bottom plate of the container, and a lower portion of the opening integrally fixed to the bottom plate. A mounting plate positioned at a fixed interval on the cable, a cable head mounted on the mounting plate and connected to a cable drawn from below, and a cable head connected to a conductor from inside the container through the opening; A cable connection device for a gas-insulated switchgear, which includes a substantially cylindrical adapter container that is vertically movable below a bottom plate and hermetically closes a peripheral side between the bottom plate and the mounting plate.