JPS6344973Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high voltage lead wire holding device for electrical equipment.

[Technical background of the invention and its problems]

The high-voltage side of electrical equipment is often led out using a cable with a closed layer due to restrictions on equipment installation or from a safety standpoint. When using a closed cable, it is necessary to perform terminal treatment on the closed layer, but this requires specific technology and may be difficult to perform at the site where electrical equipment is installed. This is often done at equipment manufacturing plants. Therefore, the length of high-voltage lead wires for electrical equipment is determined based on the maximum length of the equipment installation conditions (for example, about 5 m for power distribution equipment installed on utility poles, etc.), and the terminals are processed at the manufacturing factory. . For this reason, the high voltage lead wire is not cut at the installation site, so if the entire length is not used depending on the installation conditions, in other words, if the high voltage lead wire is close to the connected equipment, the excess part of the high voltage lead wire can be used to The structure is such that it is held on the equipment side.

An example of electrical equipment in which the contents of a transformer are housed in a tank made of steel plates will be explained below. FIGS. 1a and 1b are a top view and a front view showing a section taken along line A-A, showing an example of a conventional electric device using a closed cable with a high-voltage lead wire. The transformer contents 1 are suspended from a tank cover 3 by metal fittings 2 and housed in a tank 4. The low voltage side of the transformer interior 1 is led out by a low voltage lead wire 5 and connected to a low voltage terminal 6 fixed to the side surface of the tank 4. Also, on the high voltage side, the transformer contents 1
The tank cover 3 is connected to a high pressure lead wire 8 fixed to the tank cover 3 and led out to the outside. The high-voltage lead wire 8 is a cable with a closed layer of a predetermined length, and both ends of the cable are subjected to electric field relaxation and grounding treatment, that is, so-called terminal treatment. In FIG. 1, the grounding side of the high-voltage lead wire 8 to other equipment is omitted. The terminal 9 of the high voltage outlet line 8 connected to the transformer contents 1 is connected to the tank cover 3
It is configured into an L-shape by performing molding and end treatment for attachment to the. For the reasons mentioned above, the high-pressure lead wire 8 is long and is arranged in a round bundle on the top surface of the tank cover 3 to prevent it from unraveling or falling off to the side. A falling-off prevention fitting 10 made of a steel strip formed into a horizontal arc shape is provided on the outer periphery. The fall prevention fittings 10 are not provided all around the circumference, but are installed at predetermined locations with a predetermined interval 11 between them.
The high voltage lead wire 8 is drawn out from the part.

By the way, when installing electrical equipment, the high-voltage lead wire 8 is loosened from the bundle only to the optimum length depending on the installation conditions, the distance to the connected device, etc., and is pulled out from the space 11 and connected to the connected device. . However, in this configuration, the high voltage lead line 8
If the distance to the connected device is relatively large, the high-voltage lead wire 8 may be pulled out for a long time, become unstable due to curling, its own weight, wind pressure, etc., and fall off beyond the falling-off prevention fitting 10. Otherwise, there is a risk of damage due to excessive contact with the fall prevention fitting 10 or the tank cover 3. For this reason, there are drawbacks such as the need to separately provide a support in the vicinity of the electrical equipment, and the need to tie the high voltage lead wire 8 tightly with a string or the like to prevent it from falling off during transportation. Furthermore, since the falling-off prevention fitting 10 has an arcuate shape, the size and number of the gaps 11 are limited, and there is also the drawback that the optimum position and direction of the drawer cannot be obtained.

[Purpose of invention]

The present invention eliminates the above-mentioned drawbacks and provides a high-voltage lead wire holding device for electrical equipment that can pull out the high-voltage lead wire to any length without damaging it and easily and reliably support it on the electrical equipment side. The purpose is to

[Summary of the idea]

The present invention stores the contents of electrical equipment in a tank made of steel plate, leads out the high voltage lead wire of the contents of the electrical equipment from the tank cover using a cable with a closed layer, and connects the high voltage lead wire to the tank cover. In an electrical device that is wound and stored in a drop-prevention metal fitting provided on a tank cover and then pulled out, the fall-prevention metal fitting is configured by placing a plurality of studs at intervals around the tank cover. The present invention is characterized in that a support for supporting the high-voltage lead wire is attached to at least a part of the studs so as to be rotatable and vertically movable.

[Example of idea]

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

FIGS. 2a and 2b are a top view and a front view showing an A-A cross section of an embodiment of the high-voltage lead wire holding device for electrical equipment according to the present invention, which uses a cable with a closed layer for the high-voltage lead wire. It is.

The transformer contents 1 are suspended from a tank cover 3 by metal fittings 2 and housed in a tank 4. Transformer contents 1
The low voltage side of the tank 4 is led out by a low voltage lead wire 5 and connected to a low voltage terminal 6 fixed to the side surface of the tank 4.

The high-voltage side is led out by a high-voltage bushing 7 formed in the transformer interior 1, connected to a high-voltage outlet line 8 fixed to the tank cover 3 using a cable with a closed layer, and led out to the outside. . High pressure lead wire 8
has a predetermined length, both ends of which are subjected to terminal treatment, and the intermediate portion is wound around the upper surface of the tank cover 3 in a round bundle.

High-pressure outlet wire 8 wound on the top surface of the tank cover 3
In order to prevent the high-pressure lead wire 8 from unraveling or falling off to the side, there are a plurality of studs 13, which constitute a falling-off prevention fitting, which are threaded at a predetermined portion of the tip of a steel round bar. 1 predetermined interval in the circumferential direction
1, and some of the intervals are 1
The high-pressure lead wire 8 is drawn out from the part 1.

The high-voltage lead wire 8 is equipped with a support 1 before being subjected to terminal treatment.
4 is fitted. This support 14 is inserted into some of the studs 13, and a cap nut 15 is screwed onto the tip of the stud 13 to prevent it from coming off the stud 13, thereby supporting the high voltage lead wire 8. It's becoming like that. As an example of the support 14 is shown in FIG. 3, it is made of metal or plastic and has a hole 14a through which the high-voltage lead wire 8 passes and a hole 14b through which the stud 13 passes.
The diameter D of one through hole 14a is made slightly larger than the outer diameter of the high pressure lead wire 8 so that it can slide on the high pressure lead wire 8, and the diameter d of the other through hole 14b is the outer diameter of the stud 13. The stud 13 is made slightly larger so that it can move freely in the vertical and circumferential directions of the stud 13.

Therefore, when installing electrical equipment with such a configuration, the cap nut 15 and the support 14 should be attached to the stud 1 so that the length is optimal in relation to the connected equipment.
3a and pull out the high-voltage lead wire 8, and after connecting it to the connected device, slide the support 14, insert it into the stud 13 at the position where the drawing direction is optimal, and screw the cap nut 15.

Even when the cap nut 15 is completely tightened, the support 14 is not fixed to the stud 13, and the support 14 is not fixed to the stud 13.
It can move in the circumferential direction or in the vertical direction,
In addition, the high-voltage lead wire 8 can be held in the lead-out portion. Moreover, even if the distance between the electrical equipment and the connected device is large, there is no need to separately provide a support for the high-voltage lead wire 8, and there is no sway due to wind pressure at the pull-out section, so the high-voltage lead wire 8 may be damaged. , it is possible to prevent the excess from falling off. Furthermore, it is possible to prevent the high-voltage lead wire 8 from falling off during transportation without binding it with a string or the like.

The support 14 is not fixed to the stud 13 but is attached so that it can rotate and move up and down.
moves in accordance with the bending of the high-pressure lead wire 8, and the support 14
Coupled with the fact that the mounting position of the high-pressure lead wire 8 can be selected on any stud 13, stable holding performance can be obtained over a long period of time since the high-pressure lead wire 8 is not forcibly bent or excessive external force is applied.

[Effect of idea]

As described above, in the high voltage lead wire holding device for electrical equipment according to the present invention, it is possible to pull out the high voltage lead wire to any length without damaging it and easily and reliably support it on the electrical equipment side. .

[Brief explanation of the drawing]

1A and 1B are a top view and a front view showing an A-A cross section showing an example of a conventional high-voltage lead wire holding device for an electrical device, and FIGS. 2A and 2B are a high-voltage outlet of an electrical device according to the present invention. Top view showing the outgoing line holding device and A
-A is a front view showing the cross section, and FIG. 3 is a perspective view of the support. 1... Contents of transformer, 3... Tank cover, 4...
... Tank, 5 ... Low pressure lead wire, 8 ... High pressure lead wire, 9 ... Terminal, 11 ... Interval, 13 ... Stud, 14 ... Support, 15 ... Cap nut, D ...
Diameter of the high-pressure lead wire through hole of the support, d...Diameter of the stud through hole of the support.

Claims (1)

[Scope of utility model registration request] The contents of electrical equipment are stored in a tank made of steel plate, and the high-voltage lead wire of the contents of the electrical equipment is led out from the tank cover using a cable with a closed layer, and this high-voltage lead wire is placed above the tank cover. In an electrical device that is wound and stored in a fall-prevention metal fitting provided on the tank cover and then pulled out, the fall-prevention metal fitting is constructed by arranging a plurality of studs at intervals around the tank cover, and includes at least one stud. 1. A high-voltage lead wire holding device for electrical equipment, characterized in that a support for supporting the high-voltage lead wire is attached to a stud of the part so as to be rotatable and vertically movable.