DE29912028U1 - High voltage circuit breakers - Google Patents

Description

GR 99 G 4114 DE

Description
High voltage circuit breaker

The invention relates to a high-voltage circuit breaker with three switch poles and with one or more earthed electrically conductive encapsulation housings in which interrupter units are arranged horizontally and on which two high-voltage bushings per interrupter unit are arranged, with a cross member which carries all three switch poles next to one another and with a foundation anchored in the ground.

Such a high-voltage circuit breaker has long been known under the name dead tank switch, particularly in the USA. Such high-voltage circuit breakers with earthed encapsulation housings can, under certain conditions, also be used advantageously instead of high-voltage circuit breakers with insulating housings. 20

The present invention is based on the object of creating a high-voltage circuit breaker of the type mentioned at the outset, which can replace a conventional high-voltage circuit breaker with one or more insulating housings as simply as possible.

The object is achieved according to the invention in that at least two support posts are arranged between the foundation and the cross member, wherein the length of the support posts is at least half the length of the cross member.

The described design creates a high-voltage circuit breaker whose high-voltage connections are

GR 99 G 4114 DE

above a known high-voltage circuit breaker of the type mentioned above, which are offset upwards by the length of the support posts. This achieves the connection height that is achieved when using pole columns of conventional high-voltage circuit breakers with insulating housings. The outdoor switchgear panel in which the high-voltage circuit breaker is to be installed is normally set up to this connection height.

Current transformers can be pushed onto the high-voltage bushings of the individual switch poles, thus eliminating the need for separate foundations and supports for the transformers.

The foundations can be manufactured or reused in the same way for conventional high-voltage circuit breakers with insulating housings and the high-voltage circuit breakers with metal-encapsulated housings according to the invention, regardless of the type of switch to be installed.

Since the high-voltage circuit breakers according to the invention have horizontal interrupter units, additional supports are advantageously used in order to distribute the load over the full length of the additional supports and to be able to absorb it through the support posts. The additional supports are arranged either below or above the support posts. If the cross beams are arranged below the support posts, four support posts are required for one high-voltage circuit breaker. The additional supports are then only fastened to a point-shaped foundation in their middle area. In the other case, the vertical support posts are each fastened to a point-shaped foundation and each have a fixed

GR 99 G 4114 DE

additional support to provide a sufficiently large support surface in the longitudinal direction of the interrupter units.

Further advantageous embodiments can be found in the subclaims.

In the following, the invention is shown using a drawing and then explained.

The

Figure 1 shows a schematic view of a high-voltage circuit breaker with two support posts,

Figure 2 shows a high-voltage circuit breaker with four support rods.

Figure 1 shows a three-pole high-voltage circuit breaker with three separate encapsulation housings I ₁ 2, 3. The individual encapsulation housings are made of metal, but can also be combined to form a single encapsulation housing block.

Each of the encapsulation housings carries two high-voltage bushings 4, one of which is shown in the view.

The individual interrupter units of the circuit breaker poles are housed horizontally in the respective encapsulation housings 1, 2, 3.
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The high-voltage connections for the high-voltage circuit breaker are arranged at the upper ends of the bushings 4.

GR 99 G 4114 DE

The three encapsulation housings 1, 2, 3 are supported by a cross member 5, which rests on four support posts, of which only the two front ones 6, 7 are shown in the view. 5

Two support posts each rest on another support 8, 9, which in turn rests on a foundation 10, 11.

Figure 2 shows a high-voltage circuit breaker with three encapsulation housings 12, 13, 14, which rest together on a crossbeam 15. The crossbeam 15 is connected to a stabilizing support frame 16, 17, which is supported overall by the two support posts 18, 19 by means of further supports 20, 21 in the form of I-beams. 15

In the illustration, only a single cross beam 15 can be seen, but behind this there is another cross beam, which also rests on the other beams 20, 21. In the figures, the earth's surface is represented by a line 22, 23.

Claims (3)

1. Three-pole high-voltage circuit breaker with three switch poles, and with one or more earthed electrically conductive encapsulation housings ( 1 , 2 , 3 , 12 , 13 , 14 ) in which interrupter units are arranged horizontally and on which two high-voltage bushings ( 4 ) are arranged per interrupter unit, with a cross member ( 5 , 15 ) which carries all three switch poles and with a foundation ( 10 , 11 , 22 ) anchored in the ground, characterized in that between the foundation ( 10 , 11 , 22 ) and the cross member ( 5 , 15 ) at least two support posts ( 6 , 7 , 18 , 19 ) are arranged, the length of the support posts ( 6 , 7 , 18 , 19 ) being at least half the length of the Cross member ( 5 , 15 ). 2. High-voltage circuit breaker according to claim 1, characterized in that at least one support post ( 5 , 15 ) is connected in an angularly rigid manner by welding to a further support ( 8 , 9 , 20 , 21 ) running perpendicularly to the support post and perpendicularly to the cross member ( 5 , 15 ). 3. High-voltage circuit breaker according to claim 1 or 2, characterized in that the cross member ( 5 , 15 ) is mounted on the upper end of the support posts ( 6 , 7 , 18 , 19 ).