DE6916710U - TRANSFORMER CABINET - Google Patents

Description

In energy distribution systems for supplying urban districts or small industrial areas, consumers are close to them Stationary transformer cabinets. For economic and architectural reasons, these cabinets should if possible be kept low. They generally consist of three separate rooms, the high-voltage room, which accommodates supply cables, high-voltage fuses and disconnectors, and the transformer room with the in the middle Transformer and a Niederεpannungsraum for the connection of the outgoing low voltage cable. This division into different from each other *. The main reason why space is required around the insulation in the high-voltage and low-voltage room and to keep moisture-free and the activated transformer accessible while voltage is present in the high and low voltage areas. In contrast, there is a cooling air supply between the transformer room and the outside air The largest possible connection, which is routed over labyrinthine walls, in order to prevent objects from being pushed in through the ventilation openings (e.g. by children playing).

The low overall height of this transformer container makes it impossible to provide pressure relief flaps on the container, as is the case with conventional switchgear systems. It is therefore customary to either provide a special pressure relief space below the transformer cabinet and take the associated increase in construction costs ir purchase, or to ensure arc safety by using fully insulated devices and control rooms in the high-voltage room. But even if fully insulated parts are used, the formation of an electric arc can only then be observed

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Avoid safety even though the connections to the feeder cable are completely surrounded by solid insulation.

With the new transformer cabinet, the task is now solved without full insulation of the devices and lines in the high-voltage room and without special pressure relief spaces an arc-proof

f to ensure safe construction. The innovation thus represents a transformer cabinet for power distribution systems with separate rooms for the high-voltage part, the Low voltage part and the transformer room, of which the the latter adjoins the high-voltage rura and with the outside air is connected via large, labyrinthine ventilation openings. The new thing is that the partition between the transformer room and the high-voltage room is designed as a pressure relief flap.

One embodiment is in Fig. 1 in elevation and in Pig. 2 shown in plan.

The transformer cabinet consists of a transformer room 1, a high-voltage room 2 and a low-voltage room 3. The high-voltage and low-voltage room contains in well-known, In a manner not shown, the supply lines and necessary circuit and fuse elements. The partition 4 between the High voltage room 2 and the transformer room 1 with the transformer 5 is - as shown in Fig. 3 - attached to the transformer cabinet with the aid of bolts 6 made of plastic. The bolts 6 have a thickening at their inserted end 7, so that only when excess pressure occurs in the high-voltage space 2 the partition wall 4 from the bracket of the high-voltage room can solve. Two labyrinthine partition walls 8 and 9 protect the transformer room from being tampered with from the outside and at the same time represent the connection between the transformer room and the outside air.

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If an arc occurs in the high-voltage room, the bolts 6 are pulled out of the bracket of the transformer cabinet and the connecting plate 4 flies into the transformer room. Because it is weakly dimensioned relative to the other wall parts and also consists of permanently deformable material, the partition 4 »lies without the transformer or its Damage connecting parts around this and so allows the overpressure in the high-voltage room quickly and without a strong air flow to dismantle. The gases then emerging from the partitions 8 and 9 have been mixed with the air Cooled down in the transformer room to such an extent that there is no longer any danger to outsiders.

3 claims for protection
3 figures

- 4th

Claims (3)

- 4 - PLA 69/1155 Protection claims "* 1. Transformer cabinet for energy distribution systems with from each other separate spaces for the high voltage supply, the low voltage portion and the transformer room, the latter of which is adjacent to the high voltage room and communicating with the outside air via _t oßflächige, labyrinth-like design ventilation openings, characterized in that the partition (4) between the transformer chamber (1 ) and the high-voltage compartment (2) is designed as a pressure relief flap. 2. Transformer cabinet according to claim 1, characterized in that the partition (4) between the transformer space (1) and The high-voltage compartment (2) consists of a relatively thin, permanently deformable sheet metal that is pushed through on all sides when it occurs Releasable connecting links are attached to overpressure in the high-voltage room. 3. Transformer cabinet according to claim 2, characterized in that the connecting links consist of plastic bolts (6), which have a thickening on the bolt part that is pushed through.