DE1068333B

DE1068333B -

Info

Publication number: DE1068333B
Application number: DENDAT1068333D
Authority: DE

Description

DEUTSCHESGERMAN

Die Erfindung betrifft einen Einstützer-Trennschalter für hohe und höchste Spannungen in Scherenbauweise The invention relates to a single-post disconnector for high and very high voltages in a scissor-type design

Einstützer-Trennschalter der Scherenbauweise haben gegenüber anderen Hochspannungstrennschaltern den Vorteil eines geringen Materialbedarfes und eines übersichtlichen Aufbaues. Neben anderen Kontaktanordnungen ist es für solche Schalter bekannt, die bewegliche Kontaktanordnung direkt in den Leitungszug eingreifen zu lassen. Für bestimmte Zwecke haben diese Trennschalter jedoch noch den Nachteil, daß das die zangenförmigen Kontakte tragende Parallelogrammgestänge einen zu großen Raum im ausgeschalteten Zustand beansprucht und für eine einwandfreie Kontaktgabe besondere Maßnahmen getroffen werden müssen.Single-post disconnectors of the scissor design have compared to other high-voltage disconnectors the advantage of a low material requirement and a clear structure. In addition to other contact arrangements it is known for such switches, the movable contact arrangement directly in the cable run to intervene. For certain purposes, however, these disconnectors still have the disadvantage that the parallelogram linkage carrying the pincer-shaped contacts takes up too large a space in the switched off State stressed and special measures have been taken to ensure proper contact Need to become.

Der Erfindung liegt die Aufgabe zugrunde, einen Einstützer-Trennschalter zu bauen, der eine- sichere Kontaktgabe gewährleistet und einen raumsparenden Aufbau aufweist. Dies wird durch einen Einstützer-Scherentrennschalter, bei dem an einem Parallelogrammgestänge als Verlängerung zweier Arme des Gestänges über einen gemeinsamen Drehpunkt zangenartige Kontakte angeordnet sind, die den Gegenkon,-takt im eingeschalteten Zustand des Schalters umfassen, dadurch erreicht, daß das Parallelogrammgestänge zwecks seiner Ausladung im ausgeschalteten Zustand des Schalters nur nach einer Seite hin derart ausgebildet ist, daß das die Kontakte tragende Parallelogrammgestänge aus zwei sich jeweils gegenüberliegenden langen und kurzen, drehbeweglich miteinander verbundenen Stangen besteht, von denen die Verlängerungen einer langen und einer kurzen Stange über einen gemeinsamen Drehpunkt hinaus die Zangenkontakte bilden bzw. tragen, und daß das Parallelogrammgestänge von zwei auf einem Stützisolator schwenkbar gelagerten Armen getragen wird, von denen der eine Arm mit seinem oberen Teil die untere, kurze Stange des Parallelogrammgestänges bildet und mit den beiden langen Stangen des Parallelogrammgestänges verbunden ist und der andere, als Antriebshebel des Gestänges ausgebildete Arm an der in bezug auf die Ausschaltbewegung des Schalters außenliegenden, die eine zangenartige Kontakthälfte tragenden langen Stange des Parallelogrammgestänges über einen Drehpunkt angreift.The invention is based on the object of building a single-post disconnector that is safe Ensure contact and has a space-saving structure. This is done by a single-post scissor disconnector, in the case of a parallelogram linkage as an extension of two arms of the linkage Pliers-like contacts are arranged over a common fulcrum, which counteract the counter-clock include in the switched-on state of the switch, achieved in that the parallelogram linkage for the purpose of its projection in the switched-off state of the switch only to one side in this way it is designed that the parallelogram linkage carrying the contacts consists of two opposite one another long and short, rotatably interconnected rods, of which the Extensions of a long and a short rod beyond a common pivot point Form or wear pincer contacts, and that the parallelogram linkage of two on a post insulator pivoted arms is carried, of which one arm with its upper part the forms the lower, short rod of the parallelogram rod and with the two long rods of the parallelogram rod is connected and the other arm designed as a drive lever of the linkage the one on the outside with respect to the switching off movement of the switch, which is a pincer-like contact half engages bearing long rod of the parallelogram linkage via a pivot point.

Es ist ein Trennschalter mit einem Parallelogrammgestänge, das nach Art eines Scherengitters ausgebildet ist und bei dem die Ausschaltbewegung durch seitliches Schwenken des Antriebsisolators und einer dadurch bedingten seitlichen Schwenkung des Gestänges erfolgt, bekannt. Von dem Trennschalter gemäß der Erfindung ist diese Anordnung jedoch ihrer Art nach unterschieden, indem das scherengitterartige GestängeIt is a disconnector with a parallelogram linkage, which is designed in the manner of a concertina gate is and in which the switch-off movement by lateral pivoting of the drive isolator and one thereby conditional lateral pivoting of the linkage is known. From the circuit breaker according to the Invention, however, this arrangement is differentiated according to its type, in that the concertina-like linkage

Einstützer-Hochspannungstrennschalter
der ScherenbauweiseSingle-post high-voltage disconnector
the scissor construction

Anmelder:Applicant:

VEB Transformatorenwerk,
Karl Liebknecht,
Berlin-Oberschöneweide,
Wilhelminenhofstr. 83-85VEB transformer factory,
Karl Liebknecht,
Berlin-Oberschöneweide,
Wilhelminenhofstrasse 83-85

Walter Hojdem, Berlin-Pankow,
ist als Erfinder genannt wordenWalter Hojdem, Berlin-Pankow,
has been named as the inventor

mit einem Schubkontakt versehen ist. Es erscheint zwar möglich, diese Anordnung ebenfalls mit zangenartigen Kontakten zu versehen, jedoch treten dabei erhebliche Nachteile auf. Insbesondere ergibt sich die Tatsache, daß der die seitliche Schwenkbewegung ausführende Isolator des erforderlichen Kontaktdruckes wegen bei einer Anordnung mit Zangenkontakten noch mehr als bei einer Ausführung mit einem Schubkon-r takt auf Biegung beansprucht wird. Des weiteren führt die große Anzahl von Drehpunkten zu einer starken Labilität der Anordnung.is provided with a push contact. It seems possible, this arrangement also with pincer-like To provide contacts, however, there are considerable disadvantages. In particular, the result The fact that the isolator performing the lateral pivoting movement has the required contact pressure because of an arrangement with pincer contacts even more than in the case of a version with a push-pull con-r tact is stressed on bending. Furthermore, the large number of pivot points results in a strong one Lability of the arrangement.

Es ist ferner bereits vorgeschlagen worden, bei einem Einstützer-Trennschalter die den Gegenkontakt im eingeschalteten Zustand umfassenden, beweglichen Kontakte bzw. Kontaktbacken durch ein, Parallelogrammgestänge zu betätigen; die Verlängerung einer langen Stange dieses Parallelogrammgestänges bildet eine Kontaktbacke, und die andere Kontaktbacke wird durch die eine kurze Stange des Parallelogrammgestänges gebildet und durch die andere der beiden langen Stangen betätigt; das Parallelogrammgestänge wird durch zwei angetriebene Schwenkarme bewegt, und in einem seiner beiden unteren Drehpunkte ist ein Winkelhebel eingefügt, dessen einer Hebel die eine langelstange des Parallelogrammgestänges trägt und dessen anderer Hebel mit dem anderen Schwenkarm mittels einer Stange starr verbunden ist; auch dieses Bewegungsgestänge ladet im Ausscbaltzustand des Schalters nur nach einer Seite aus.It has also already been proposed that the counter-contact in a single-post disconnector when switched on, comprehensive, movable contacts or contact jaws through a parallelogram linkage to operate; forms the extension of a long rod of this parallelogram linkage one contact jaw, and the other contact jaw is through the one short rod of the parallelogram linkage formed and operated by the other of the two long rods; the parallelogram linkage is moved by two driven swivel arms, and is in one of its two lower pivot points an angle lever inserted, one lever of which carries a long rod of the parallelogram linkage and the other lever of which is rigidly connected to the other pivot arm by means of a rod; also this Moving linkage only unloads to one side when the switch is switched off.

Bei dem Trennschalter gemäß der Erfindung sind die zangenartigen Kontakte in an sich bekannter Weise so ausgebildet, daß sie am Gegenkontakt eine Dreipunktauflage bilden, indem der eine Zangen- bzw.In the circuit breaker according to the invention, the pincer-like contacts are known per se Way designed in such a way that they form a three-point support on the mating contact, in that one of the pliers or

909 647/295909 647/295

Claims

Scissor arm is equipped with two prongs and the other, single-pronged tong arm clamps the mating contact between the two prongs of the first tong arm. To achieve a uniform contact pressure, it may be necessary to take special measures so that the same contact pressure is always present regardless of the position of the mating contact within the tolerances. This can be achieved in that at least one of the pincer-shaped contacts is provided with a button-shaped contact rail which is connected to the actual pincer-like contact via a lever arrangement. The pincer-like contacts are advantageously designed in a known manner as catch arms for detecting the mating contact. Another significant advantage of the isolating switch according to the invention results from the fact that a spring is switched on in the long side of the parallelogram linkage which is on the inside during the switching-off movement. This ensures in a simple manner that there is always a good contact pressure. With reference to the figure, this will be explained in more detail using exemplary embodiments according to the invention. Fig. 1 shows a scissor disconnector with a parallelogram linkage projecting to one side according to the invention. The full lines indicate the switch-on position and the broken lines indicate the switch-off position. The two arms 3, 4 and 3 ', 4' carrying the parallelogram linkage are mounted on the head 1 of the support insulator 2. The support insulator for the parallelogram linkage can be one consisting of an isolator, tripod support or another isolator construction suitable for single-support construction. The circuit breaker is switched on and off by actuating the drive isolator 6. The movement of the arm 3 inevitably changes the position of the parallelogram linkage with the two long rods 5 and 7 and the two short rods 12 and 13. The pincer contacts 8, 9 or 8 ′, 9 ′ thus also change their position relative to one another and, when switched on, encompass the mating contact 10. One short rod 13 of the parallelogram linkage is formed by the upper part of the arm 4. To ensure sufficient contact pressure, a spring 11 is provided in the long rod 7 of the parallelogram linkage, which is on the inside during the disconnection movement. From Fig. 1 it can be seen that the pincer-like contacts 8, 9 grip the mating contact 10 securely within large tolerances, and as Fig , however, the tong arm 9 have only one prong which engages in the gap between the prongs of the tong arm 8 and thereby clamp the mating contact between them. Another advantage is that the three-point support of the pincer-like contacts results in perfect breaking of the ice when the mating contact is iced. . FIG. 3 shows a schematic representation of the operation of the contact arrangement, in which one of the pincer-like contacts is provided with a button-like contact rail, in the switched-on state, while FIG. 4 shows the structure of an exemplary embodiment. The mating contact 21 is gripped by the two contact fingers 22 and 23 designed as pushbuttons. Of the two pushbuttons, one is designed as a fixed rail or is gebikiet by the pincer or scissor arm, while the other is designed to be movable as one side of a parallelogram linkage 23, 25. Compression springs 27 produce the desired contact pressure depending on their setting. By transmitting pressure by means of the parallelogram linkage 23, 25, 26, a constant contact pressure is achieved regardless of the engagement position of the mating contact 21 - further engagement options 28 and 29 are shown in broken lines. Fig. 4 shows the movable pushbutton with the associated functional elements, which are preferably housed in a box-shaped design of the scissors arm or pincer arm end 30 in order to be protected against external influences and not to interrupt the smooth lines of the entire switch structure. Patent claims:

1. Single-post high-voltage disconnector of the scissor design, in which pliers-like contacts are arranged on a parallelogram linkage as an extension of two arms of the linkage over a common pivot point, which include the mating contact when the switch is switched on, characterized in that the parallelogram linkage for the purpose of its projection in the switched-off state Switch is designed only on one side in such a way that the parallelogram linkage carrying the contacts (8, 9) consists of two opposing long (5, 7) and short (12, 13) rotatably interconnected rods, of which the extensions a long (5) and a short (12) rod form or carry the pincer contacts (8, 9) beyond the common pivot point, and that the parallelogram linkage is supported by two arms (3, 4) pivoted on a support insulator which one arm (4) with its upper part the lower, short side (13) de s parallelogram linkage and is connected to the two long rods (5, 7) of the parallelogram linkage and the other arm, designed as a drive lever of the linkage, is attached to the long rod (5) of the outer with respect to the switch-off movement of the switch, which carries a pincer-like contact half Attacks parallelogram linkage via a pivot point (14) .

2. High-voltage disconnector according to claim 1, characterized in that a spring (11) is switched on in the long rod (7) of the parallelogram linkage (5, 7, 12, 13) lying inside with respect to the switching-off movement.

3. High-voltage disconnector according to claim 1, characterized in that the pincer-like contacts (8, 9) by forming one pincer arm (8) with two prongs, between which the other, single-pronged pincer arm (9) is arranged, on the mating contact (10) concern in three points.

4. High-voltage disconnector according to claim 1, characterized in that at least one of the pincer-like contacts is provided with a button-like contact rail (23) which is connected to the actual pincer-like contact (25)