CH682961A5 - Partially buried transformer station - comprises underground enclosure in which vertically movable transformer unit is mounted on lifting appts., and cover which can be raised accordingly - Google Patents

Abstract

The transformer station comprises an enclosure (1), which is partially located underground. A mobile unit (2) is vertically displaceable within the enclosure by a lifting appts. (6-8), and has medium and low voltage equipment mounted on it. The lifting appts. is hydraulically or mechanically operated. The mobile unit is movable between a lower position, at which it is fully located in the enclosure, and a second position at which ther unit is partially outside the enclosure or adjacent the level of the soil. A cover (9) is placed on the upper edges of the enclosure and can be raised to suit the upward movement of the transformer unit. ADVANTAGE - Reduced volume for contg. transformer equipment. Lightweight and has sufficient access space.

Description

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CH 682 961 A5

2

Description

The subject of the invention is an at least partially buried transformer station.

There are currently a large number of transformer stations in the form of booths. Large size above-ground cabins are known in particular, which are used less and less because their size raises opposition from owners and neighbors. These achievements allow a service provided from inside the cabin with sufficient comfort and security.

Small above-ground booths have been developed which require special medium voltage equipment of small dimensions which is expensive. These cabins are serviced from the outside with reduced comfort.

There are also buried or semi-buried cabins as shown schematically in Figs. 4 and 5. These cabins are necessarily bulky and therefore expensive because to provide the service the assembler must be able to have sufficient space inside the cabin to respect working comfort and safety.

The object of the present invention is to reduce the volume required by a transformer station, with equal equipment, and to facilitate the service of the station. The subject of the present invention is a transformer station housed in a cabin which has the characteristics listed in claim 1.

The attached drawing illustrates schematically and by way of example two embodiments of the transformer station according to the invention.

Fig. 1 is a section schematically illustrating a semi-buried cabin.

Fig. 2 is a top view, without roof, of the cabin illustrated in FIG. 1.

Fig. 3 is a section schematically illustrating a buried cabin according to the invention.

In its first embodiment, the transformer station is housed in a semi-underground cabin. This cabin comprises an enclosure 1 made of concrete, masonry, plastic or other suitable material comprising a part buried in the ground and a part situated above the ground.

In this enclosure 1 is disposed a movable interior frame 2 open on the top and on the front, intended to receive all the medium voltage equipment 3, the transformer 4 and the low voltage switchboard 5. The internal volume of this movable frame 2 is strictly dictated by the space required for the provision of medium and low voltage equipment.

This mobile frame 2 is mounted vertically displaceable inside the element 1 using a lifting device. In the example illustrated, this lifting device is constituted by these jacks 6 supplied by a pump 7 via a three-way valve 8. Any lifting device can however be used, central jack, lifting platform , mechanical cylinder, etc.

In normal operation the movable frame 2 is lowered into the enclosure 1 and the cabin is covered with a roof 9 resting on the upper edges of this enclosure 1.

When it is necessary to intervene on the transformer station, the fitter activates the lifting device causing the mobile frame 2 to rise, lifting the roof 9 in passing, to a position for which the bottom 10 of the mobile frame is located approximately at ground level S. In this position, the station equipment is accessible via the open front face of the movable frame 2, but the fitter can remain outside the cabin, the dimensions of which are thus reduced accordingly.

This new solution requires a slightly deeper enclosure 1 but having a much smaller encroachment on the self than a conventional semi-underground station.

Thus, the original solution proposed solves not only the problem of space and size but also that of service safety by using a mechanical lifting system (jack or lifting platform) hydraulic or similar to bring to the surface l 'enveiop-pe or frame containing electrical equipment. With this solution, the fitter will not have to enter the cabin since all the manipulations can be done from the outside, at ground level.

Fig. 3 illustrates a second embodiment of the transformer station which is completely buried. The enclosure 1, entirely underground is provided with ventilation 11 and the roof is replaced by a sufficiently solid slab 12. This enclosure 1 also receives the casing or movable frame 2 actuated by a lifting system L and containing the medium and low voltage equipment.

We can choose either the cheaper semi-buried solution because the ventilation problems are simple, or the completely buried solution where forced ventilation is necessary. In addition, the slab must be much more resistant than the roof which must not withstand traffic. From the manufacturing point of view, the elements will be identical and to move from one solution to another, it will suffice to bury the enclosure 1 more or less.

Claims (4)

Claims 1. Transformer station at least partially buried, characterized in that it comprises an enclosure at least partially buried in which is mounted in a movable manner vertically under the action of a lifting device a mobile frame on which is mounted an equipment medium and low voltages, by the fact that this frame is movable between a low position for which it is entirely located in the enclosure and a second position for which it is located at least partially outside this enclosure, where the bottom of the frame is close to ground level. 2. Station according to ia claim 1, characterized in that it comprises a roof placed on the upper edges of the enclosure, this roof being raised by the frame during the elevation thereof. 3. Station according to claim 1 or the claim 5 10 15 20 25 30 35 40 45 50 55 60 65 2 3 CH 682 961 A5 cation 2, characterized in that the lifting device is mechanical or hydraulic. 4. Station according to one of the preceding claims, characterized in that the enclosure is entirely buried and comprises ventilation means. 5 10 15 20 25 30 35 40 45 50 55 60 65 3