AT229403B

AT229403B - High voltage disconnector

Info

Publication number: AT229403B
Application number: AT984861A
Authority: AT
Original assignee: Continental Elektro Ind Ag
Priority date: 1961-03-21
Filing date: 1961-12-29
Publication date: 1963-09-10

Description

  

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  Hochspannungstrennschalter 
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 taktberührung miteinander verbunden. Die Anordnung ist so getroffen, dass die Zugfeder 11, die in mit den Schaltstücken verbundenen Federhalterungen 11a festgelegt ist, in einem als Anschlag dienenden Ansatz 13 geschützt untergebracht ist. Wird dagegen eine Druckfeder verwendet, so ist sie vorzugsweise in der Ausnehmung 14 eines oder beider Schaltstücke vorzusehen, die dann mit einer Kappe 15 verschlossen ist. 



   Da der Schalter vornehmlich in Freiluftanlagen eingesetzt wird, ist der den Bolzen 10 umschliessende Ansatz 13, der auch die Zugfeder aufnimmt, derart mit scharfkantigen Vorsprüngen 16 versehen, dass er in der Lage ist, einen möglichen Eisansatz am Gegenkontakt vor dem Auftreffen der Schaltstücke abzusprengen. 



   Die beiden zusammenwirkenden Schaltstücke kommen, wie an sich bekannt ist, durch gegenphasige Drehbewegung der Stützer 1 und 9 und durch Ineinandergreifen der Schaltstücke 5, 6 und 7 in Kontaktberührung. Die einander zuerst   berührenden Teile   der Schaltstücke sind so   geformt, dass   dadurch ein Spreizen der Kontaktarme 2 und 3 und ein Spannen der Zug- und Druckfeder 11 bzw. 12 verursacht wird. Durch diese Einschaltbewegung kommt diese Feder zur Wirkung, und es ist ohne weiteres ersichtlich, dass es gleichgültig ist, ob sich die Berührungspunkte der Kontaktelemente durch besondere Umstände gegeneinander verschoben haben oder nicht. Die Grösse des Kontaktdruckes bleibt hievon unberührt. Der Anpressdruck ist somit ausschliesslich durch die Federn 11 oder 12 bestimmt.



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  High voltage disconnector
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 tact contact connected to each other. The arrangement is made in such a way that the tension spring 11, which is fixed in spring holders 11a connected to the contact pieces, is accommodated in a protected manner in a shoulder 13 serving as a stop. If, on the other hand, a compression spring is used, it should preferably be provided in the recess 14 of one or both contact pieces, which is then closed with a cap 15.



   Since the switch is mainly used in open-air systems, the projection 13 surrounding the bolt 10, which also accommodates the tension spring, is provided with sharp-edged projections 16 in such a way that it is able to break off any ice accumulation on the mating contact before the contact pieces hit.



   As is known per se, the two interacting contact pieces come into contact with each other by rotating the supports 1 and 9 in opposite phase and by engaging the contact pieces 5, 6 and 7. The parts of the contact pieces that come into contact first are shaped in such a way that the contact arms 2 and 3 are spread apart and the tension and compression springs 11 and 12 are tensioned. This switch-on movement causes this spring to take effect, and it is readily apparent that it does not matter whether the points of contact of the contact elements have shifted from one another due to special circumstances or not. The size of the contact pressure remains unaffected. The contact pressure is therefore determined exclusively by the springs 11 or 12.

Claims

The following consideration shows that the switching arms 2 and 3 are only used slightly to generate the contact pressure. If "f" denotes the deflection of the switching arms necessary to compensate for the wear and to tension the contact pressure spring 11 or 12, the spring pulls the arms together by "f / 2" in the disconnected position. In the on position, however, the arms are moved by the counter-contact by "f", i.e. H. pushed apart by "f / 2" above the normal position. As can be seen, the arms are only slightly loaded in both switching positions because the spring is approximately EMI2.1 PATENT CLAIMS: 1.

High-voltage disconnector with movable switching arms, one of which consists of at least two approximately parallel legs firmly connected to a support insulator and which are provided at their ends with rigidly attached contact pieces that slide into one another in the switched-on position, characterized in that for generating the Contact pressure at the point of contact of the switching pieces a resilient member connecting the free ends of the two-legged switching arm is provided, which is only effective when the contact is made.

2. High-voltage disconnector according to claim 1, characterized in that at the ends of a EMI2.2

3. High-voltage disconnectors according to claims l and 2, characterized in that a compression spring is arranged as a resilient member in the interior of the shell-shaped switching piece.

4. High-voltage disconnector according to claim 1, characterized in that the contact pressure is generated by a tension spring which lies within the approach designed as a stop.

5. High-voltage disconnector according to claims 1 to 3, characterized in that the recess of the shell-shaped switching piece is closed dust-tight with a cap.

6. High-voltage disconnector according to claims 1 to 5, characterized in that the approach serving as a stop and to protect the connecting bolt has cutting edges for breaking up ice accretion.