EP0606264B1 - Vacuum switch with a drive device and a pole operating unit - Google Patents
Vacuum switch with a drive device and a pole operating unit Download PDFInfo
- Publication number
- EP0606264B1 EP0606264B1 EP92919429A EP92919429A EP0606264B1 EP 0606264 B1 EP0606264 B1 EP 0606264B1 EP 92919429 A EP92919429 A EP 92919429A EP 92919429 A EP92919429 A EP 92919429A EP 0606264 B1 EP0606264 B1 EP 0606264B1
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- European Patent Office
- Prior art keywords
- carrier
- limbs
- switching tube
- vacuum
- vacuum switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Definitions
- the invention relates to a vacuum switch with the following features: A drive device for providing a driving force for at least one vacuum interrupter; a pole drive unit receiving the vacuum interrupter at one end, consisting of a carrier, a lever arrangement deflecting the direction of movement of the drive device and a connecting device for connecting a movable drive plunger of the vacuum interrupter to an outer conductor;
- the carrier is designed as a U-shaped sheet metal part with a central part and two legs;
- a support insulator for connecting the drive device to the carrier is fixed at one end to the central part of the carrier; aligned elongated holes are arranged in the legs of the carrier for receiving the ends of a bolt which guides the drive tappet of the vacuum interrupter in a straight line and transmits a drive force; an insulating coupling rod for connecting the drive device with the deflecting lever arrangement and A contact force spring to be tensioned when the vacuum interrupter is switched on and an abutment supporting the contact force spring is arranged between the legs of the carrier.
- a vacuum switch with these features is known from US-A-4,654,494.
- the object of the invention is to design the pole drive unit in such a way that its individual parts are easy to assemble and that the pole drive unit is as light as possible with great mechanical strength.
- the distance between the legs of the wearer can be expanded by elastic bending;
- the abutment of the contact force spring is arranged in a stationary manner and is plate-shaped with a width which corresponds to the distance between the legs in the idle state;
- pins are arranged for engaging in assigned openings in the legs and the connecting device is designed as an assembly connecting and stiffening the legs.
- the abutment of the contact force spring can be pushed in after the legs of the carrier have been bent open until the pins can engage in the openings assigned to them. If the spreading force exerted on the legs is then released, the abutment between the legs of the wearer is fastened in a form-fitting manner. The attachment of additional fasteners is therefore unnecessary.
- the flexibility of the legs of the carrier can be achieved in a known manner by a suitable choice of the thickness of the material.
- the carrier is therefore a relatively thin and light component. Nevertheless, this component is able to fulfill its task of safely guiding the deflecting lever arrangement because the connecting device connects the legs to one another and thereby forms a closed and rigid frame.
- a cross-sectionally U-shaped base for a vacuum interrupter with a connecting device connecting the legs is known per se (US Pat. No. 4,684,771). However, this does not depend on a stiffening effect of the connecting device and the strength of the base, because this is only in connection with the current transmission from the movable connecting bolt of the vacuum interrupter to the stationary connecting device.
- the vacuum switch according to the invention can be further improved by further features.
- openings can be arranged in the legs of the carrier as an access opening to a clamping device on the movable drive plunger of the vacuum interrupter. Therefore, the vacuum interrupter can be assembled or disassembled when the pole drive unit is otherwise fully assembled.
- the stiffening of the pole drive unit can also be contributed by the fact that the support insulator is fastened near the end of the carrier facing the vacuum interrupter by inserting an insulating support strut on the central part of the carrier and that the edge of the central part is rounded and / or bent at the end of the carrier .
- the rounding or bending on the middle part of the carrier is facilitated by the relatively small material cross section and leads both to a local stiffening and to an advantageous control of the electrical field in this area.
- the support strut can be connected to the central part of the carrier by positive locking. This can also be achieved in an advantageous manner by bent pins which are located on the central part of the carrier.
- the legs of the carrier can be provided with recesses which are open towards the edge and aligned with the longitudinal axis of the pole drive unit for inserting a centering support of the associated vacuum interrupter.
- connection device is designed as an assembly which connects and stiffens the legs. According to developments of the invention, different designs are provided depending on the heating to be expected.
- connection device can advantageously be designed as a U-shaped stamped and bent part with a central part and legs, the legs of the Connection device overlap the legs of the carrier and wherein the central part of the connection device serves as a carrier of a connection contact surface. If it is intended to manufacture both the U-shaped support and the connection device from sheet steel, it can be advantageous, at least in the case of applications in the upper region of the intended nominal current range, to have the legs of the support with recesses open at the edge in the region of one of the movable connecting bolts of the associated vacuum interrupter to provide the flexible conductor connecting the connecting device. In this way, the cross section of the closed iron circuit is weakened in the region of the flexible conductor in such a way that the heating due to eddy currents does not exceed a permissible level.
- connection device For higher rated currents, which lead to greater heating, it is advisable to design the connection device as a U-shaped cast metal body provided with cooling fins, the leg for overlapping the legs of the carrier and a central part free of ribs as the carrier of a connection contact surface.
- FIG. 1 shows a side view of a pole of a vacuum circuit breaker with the support insulators used for fastening, but without a drive device.
- FIGS. 2, 3 and 4 show the carrier of a pole drive unit of the circuit breaker according to FIG. 1 in a side view, an end view and a top view.
- FIGS. 5, 6 and 7 show a bridge-like connecting device designed as a sheet metal part in a front view, a side view and in cross section.
- FIG. 8 shows a side view of a vacuum circuit breaker with a connecting device designed as a rib cast body.
- FIGS. 9, 10 and 11 show the connection device of the circuit breaker according to FIG. 8 as an individual part in a side view, a front view and a top view.
- the pole unit 1 shown in Figure 1 comprises a vacuum interrupter 2, a pole head 3 with an upper connection device 4 and a pole drive unit 5 with a lower connection device 6.
- the pole head 3 and the pole drive unit 5 are for stiffening with two front insulating support struts 7 and a rear insulating support strut 8 connected.
- a post insulator 10 are each attached to the pole head 3 and the pole drive unit 5.
- the support insulators 10 serve to attach the pole unit 1 to an earthed drive box, not shown, which contains a drive device for the pole unit 1. If a vacuum switch is designed with multiple poles, a plurality of pole drive units 5 with vacuum interrupters 2 are attached to a common drive box by means of support insulators 10 (cf. drive box 51 in FIG. 8).
- the pole drive unit 5 contains a lever arrangement which comprises an upper toggle lever 11, a lower toggle lever 12 and a support lever.
- the support lever 13 can be pivoted about a bearing pin 15 and, when the vacuum interrupter 2 is switched off, bears against an abutment 17 under the influence of a contact force spring 16 designed as a helical compression spring. Starting from the position of the parts shown, the vacuum interrupter 2 is moved into its switched-on position by introducing a driving force into the lower toggle lever 12 in the direction of the arrow 20.
- the toggle levers 11 and 12 are thereby brought into a position close to the extended position, the support lever 13 being lifted off the abutment 17 after the switching contacts of the vacuum interrupter 2 have touched.
- the pole drive unit 5 has a carrier 21 made of sheet steel, which is shown in more detail in FIGS. 2, 3 and 4.
- the carrier 21 has two legs 22 and a middle part 23 in a U-shaped basic shape.
- the middle part 23 faces the post insulators 10 (FIG. 1).
- the rear support strut 8 is positively connected to the central part 23 by two pins 24.
- the section of the support strut 8 resting on the middle part 23 also serves as a support for the lower support insulator 10.
- the lower support insulator 10 and the support strut 8 are thus simultaneously fastened to the pole drive unit 5 by means of a fastening screw 25 indicated in FIG.
- the edges 28 of the central part 23 are rounded for reinforcement and at the same time for electrical relief.
- the legs 22 of the carrier 21 are provided with aligned elongated holes 27 (FIG. 2).
- the other end of the flexible conductor 33 ends at a connection contact surface 34 belonging to the connection device 6.
- the carrier 21 in the lower region of the legs 22 are narrow rectangular openings 35 which are used to engage correspondingly shaped pins 36 of the plate-shaped abutment 17 of the Have contact force spring 16.
- the carrier 21 is dimensioned such that the legs 22 can be elastically spread in order to align the pins 36 in the region of the openings 35. After removing the spreading force, the abutment 17 is firmly clamped between the legs 22.
- the legs 22 of the carrier 21 have recesses 37 which are aligned with the longitudinal axis of the vacuum interrupter 2 and which are provided for engaging a centering support 38 for the vacuum interrupter 2.
- Another feature of the carrier 21 is a window-like opening 40 arranged in the middle part 23, which serves to pass through the insulating coupling rod 14 shown in FIG. 8, which is to be connected to the lower toggle lever 12 in the manner mentioned.
- the legs 22 are provided with recesses 41 which are open at the edge and are located in the region through which the flexible current band 33 extends. The purpose of these recesses is to weaken the cross section of the magnetic circuit which is formed around the current path when both the carrier 21 and the connecting device 6 to be described with reference to FIGS. 5, 6 and 7 consist of a magnetically conductive material.
- the connecting device 6 is likewise a sheet metal part of U-shaped cross section with a shape adapted to the carrier 21 in such a way that its legs 43 overlap the legs 22 of the carrier 21. Holes 44 in the legs 43 are provided for a screw connection.
- the connection device 6 On the front side, the connection device 6 is open in the upper part for the passage of the current band 33. In the lower part there is a central web 45 connecting the legs 43 for supporting the end of the flexible conductor 33 provided with the connection contact surface 34. The upper ends of the legs 43 are with bent tabs 46 provide for fastening the two front insulating support struts 7.
- the support 21 is stiffened in such a way that, despite a relatively small material cross section, sufficient strength is achieved to reliably absorb the forces occurring without disturbing deformations.
- the heating of the carrier 21 and the connection device 6 remains low due to the recesses 41 in the legs 21.
- the vacuum circuit breaker described is to be operated in the range of very high nominal currents, the heat to be dissipated from the vacuum interrupter 2 cannot be completely dissipated from the described parts via the movable connecting bolt 26. In this case, it is advisable to choose a design of the connection device according to FIG. 8 and FIGS. 9, 10 and 11.
- FIG. 8 schematically shows a complete vacuum circuit breaker with a pole unit 50, a drive device 51 and with support insulators 52 connecting the pole unit 50 and the drive device 51.
- a connection device 53 attached to the carrier 21 of the pole drive unit. This is designed as a cast metal body provided with ribs in order to increase its surface area in order to give off heat better to the surroundings.
- Figures 9, 10 and 11 show details of this design.
- the connecting device 53 is U-shaped in cross section in such a way that legs 54 engage over the legs 22 of the carrier 21. Ribs 55 extend in part over almost the entire height of the carrier 21, and, insofar as the openings provided in the legs 22 of the carrier 21 allow it, also over the width of the legs 22. A central web 56 between the legs 53 serves, similarly to the connection device 6, for supporting the end of a flexible current band. It can also be seen from FIG. 8 that the pole head 57 is also provided with ribs in a manner corresponding to FIGS. 9, 10 and 11, in order to also ensure improved heat dissipation at the upper end of the vacuum interrupter 2.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Electric Vacuum Cleaner (AREA)
Abstract
Description
Die Erfindung betrifft einen Vakuumschalter mit folgenden Merkmalen:
Eine Antriebsvorrichtung zur Bereitstellung einer Antriebskraft für wenigstens eine Vakuumschaltröhre;
eine die Vakuumschaltröhre an ihrem einen Ende aufnehmende Polantriebseinheit, bestehend aus einem Träger, einer die Bewegungsrichtung der Antriebsvorrichtung umlenkenden Hebelanordnung und einer Anschlußvorrichtung zur Verbindung eines bewegbaren Antriebstößels der Vakuumschaltröhre mit einem äußeren Leiter;
der Träger ist als U-förmiges Blechteil mit einem Mittelteil und zwei Schenkeln ausgebildet;
ein Stützisolator zur Verbindung der Antriebsvorrichtung mit dem Träger ist mit seinem einen Ende an dem Mittelteil des Trägers befestigt;
in den Schenkeln des Trägers sind fluchtende Langlöcher zur Aufnahme der Enden eines den Antriebsstößel der Vakuumschaltröhre geradlinig führenden und eine Antriebskraft übertragenden Bolzens angeordnet;
eine isolierende Koppelstange zur Verbindung der Antriebsvorrichtung mit der umlenkenden Hebelanordnung und
eine beim Einschalten der Vakuumschaltröhre zu spannende Kontaktkraftfeder sowie ein die Kontaktkraftfeder abstützendes Widerlager ist zwischen den Schenkeln des Trägers angeordnet.The invention relates to a vacuum switch with the following features:
A drive device for providing a driving force for at least one vacuum interrupter;
a pole drive unit receiving the vacuum interrupter at one end, consisting of a carrier, a lever arrangement deflecting the direction of movement of the drive device and a connecting device for connecting a movable drive plunger of the vacuum interrupter to an outer conductor;
the carrier is designed as a U-shaped sheet metal part with a central part and two legs;
a support insulator for connecting the drive device to the carrier is fixed at one end to the central part of the carrier;
aligned elongated holes are arranged in the legs of the carrier for receiving the ends of a bolt which guides the drive tappet of the vacuum interrupter in a straight line and transmits a drive force;
an insulating coupling rod for connecting the drive device with the deflecting lever arrangement and
A contact force spring to be tensioned when the vacuum interrupter is switched on and an abutment supporting the contact force spring is arranged between the legs of the carrier.
Ein Vakuumschalter mit diesen Merkmalen ist durch die US-A-4 654 494 bekannt geworden. Der Erfindung liegt hiervon ausgehend die Aufgabe zugrunde, die Polantriebseinheit so zu gestalten, daß ihre Einzelteile leicht montierbar sind und daß die Polantriebseinheit bei großer mechanischer Festigkeit ein möglichst geringes Gewicht aufweist.A vacuum switch with these features is known from US-A-4,654,494. Based on this, the object of the invention is to design the pole drive unit in such a way that its individual parts are easy to assemble and that the pole drive unit is as light as possible with great mechanical strength.
Diese Aufgabe wird gemäß der Erfindung durch folgende weitere Merkmale gelöst:
Der Abstand der Schenkel des Trägers ist durch elastische Biegung erweiterbar;
das Widerlager der Kontaktkraftfeder ist ortsfest angeordnet und plattenförmig mit einer Breite ausgebildet, die dem Abstand der Schenkel im Ruhezustand entspricht;
an den zur Anlage an den Schenkeln des Trägers bestimmten Schmalseiten des Widerlagers sind Zapfen zum Eingreifen in zugeordnete Durchbrechungen der Schenkel angeordnet und
die Anschlußvorrichtung ist als eine die Schenkel verbindende und versteifende Baugruppe ausgebildet.This object is further achieved according to the invention by the following Features solved:
The distance between the legs of the wearer can be expanded by elastic bending;
the abutment of the contact force spring is arranged in a stationary manner and is plate-shaped with a width which corresponds to the distance between the legs in the idle state;
On the narrow sides of the abutment which are intended for contact with the legs of the carrier, pins are arranged for engaging in assigned openings in the legs and
the connecting device is designed as an assembly connecting and stiffening the legs.
Bei der Polantriebseinheit läßt sich aufgrund der Merkmale der Erfindung das Widerlager der Kontaktkraftfeder nach Aufbiegung der Schenkel des Trägers einschieben, bis die Zapfen in die ihnen zugeordneten Durchbrechungen eingreifen können. Wird dann die auf die Schenkel zur Einwirkung gebrachte Spreizkraft aufgehoben, so ist das Widerlager zwischen den Schenkeln des Trägers formschlüssig befestigt. Das Anbringen zusätzlicher Befestigungselemente ist daher entbehrlich. Die Biegsamkeit der Schenkel des Trägers ist in bekannter Weise durch eine geeignete Wahl der Dicke des Materials zu erreichen. Der Träger ist daher ein verhältnismäßig dünnes und leichtes Bauteil. Dennoch vermag dieses Bauteil seine Aufgabe zu erfüllen, die umlenkende Hebelanordnung sicher zu führen, weil die Anschlußvorrichtung die Schenkel miteinander verbindet und hierdurch ein geschlossener und steifer Rahmen gebildet wird.In the case of the pole drive unit, the abutment of the contact force spring can be pushed in after the legs of the carrier have been bent open until the pins can engage in the openings assigned to them. If the spreading force exerted on the legs is then released, the abutment between the legs of the wearer is fastened in a form-fitting manner. The attachment of additional fasteners is therefore unnecessary. The flexibility of the legs of the carrier can be achieved in a known manner by a suitable choice of the thickness of the material. The carrier is therefore a relatively thin and light component. Nevertheless, this component is able to fulfill its task of safely guiding the deflecting lever arrangement because the connecting device connects the legs to one another and thereby forms a closed and rigid frame.
Ein im Querschnitt U-förmiger Sockel für eine Vakuumschaltröhre mit einer die Schenkel verbindenden Anschlußvorrichtung ist an sich bekannt (US-A-4 684 771). Hierbei kommt es allerdings auf eine versteifende Wirkung der Anschlußvorrichtung und die Festigkeit des Sockels nicht an, weil dieser nur im Zusammenhang mit der Stromübertragung von dem bewegbaren Anschlußbolzen der Vakuumschaltröhre zu der ortsfesten Anschlußvorrichtung steht.A cross-sectionally U-shaped base for a vacuum interrupter with a connecting device connecting the legs is known per se (US Pat. No. 4,684,771). However, this does not depend on a stiffening effect of the connecting device and the strength of the base, because this is only in connection with the current transmission from the movable connecting bolt of the vacuum interrupter to the stationary connecting device.
Durch weitere Merkmale kann der Vakuumschalter nach der Erfindung noch verbessert werden. Insbesondere können in den Schenkeln des Trägers Durchbrüche als Zugangsöffnung zu einer Klemmvorrichtung am bewegbaren Antriebsstößel der Vakuumschaltröhre angeordnet sein. Daher kann die Vakuumschaltröhre montiert oder demontiert werden, wenn die Polantriebseinheit im übrigen fertig montiert ist. Zur Versteifung der Polantriebseinheit kann noch dadurch beigetragen werden, daß der Stützisolator nahe dem der Vakuumschaltröhre zugewandten Ende des Trägers unter Einfügung einer isolierenden Stützstrebe an dem Mittelteil des Trägers befestigt ist und daß die Kante des Mittelteiles am Ende des Trägers abgerundet und/oder angebogen ausgebildet ist. Die Abrundung oder Anbiegung an dem Mittelteil des Trägers wird durch den verhältnismäßig geringen Materialquerschnitt erleichtert und führt sowohl zu einer örtlichen Versteifung als auch zu einer vorteilhaften Steuerung des elektrischen Feldverlaufes in diesem Bereich.The vacuum switch according to the invention can be further improved by further features. In particular, openings can be arranged in the legs of the carrier as an access opening to a clamping device on the movable drive plunger of the vacuum interrupter. Therefore, the vacuum interrupter can be assembled or disassembled when the pole drive unit is otherwise fully assembled. The stiffening of the pole drive unit can also be contributed by the fact that the support insulator is fastened near the end of the carrier facing the vacuum interrupter by inserting an insulating support strut on the central part of the carrier and that the edge of the central part is rounded and / or bent at the end of the carrier . The rounding or bending on the middle part of the carrier is facilitated by the relatively small material cross section and leads both to a local stiffening and to an advantageous control of the electrical field in this area.
Die Stützstrebe kann hierbei mit dem Mittelteil des Trägers durch Formschluß verbunden sein. Dies kann in vorteilhafter Weise gleichfalls durch ausgebogene Zapfen erreicht werden, die sich an dem Mittelteil des Trägers befinden.The support strut can be connected to the central part of the carrier by positive locking. This can also be achieved in an advantageous manner by bent pins which are located on the central part of the carrier.
Ferner können die Schenkel des Trägers mit zum Rand hin offenen und zur Längsachse der Polantriebseinheit ausgerichteten Ausnehmungen zum Einlegen eines zentrierenden Auflagers der zugehörigen Vakuumschaltröhre versehen sein.Furthermore, the legs of the carrier can be provided with recesses which are open towards the edge and aligned with the longitudinal axis of the pole drive unit for inserting a centering support of the associated vacuum interrupter.
Wie eingangs erwähnt, ist die Anschlußvorrichtung als eine die Schenkel verbindende und versteifende Baugruppe ausgebildet. Dabei sind nach Weiterbildungen der Erfindung je nach der zu erwartenden Erwärmung unterschiedliche Bauformen vorgesehen.As mentioned at the outset, the connection device is designed as an assembly which connects and stiffens the legs. According to developments of the invention, different designs are provided depending on the heating to be expected.
Bei normalen Werten der Erwärmung kann die Anschlußvorrichtung vorteilhaft als U-förmiges Stanz-Biege-Teil mit einem Mittelteil und Schenkeln ausgebildet sein, wobei die Schenkel der Anschlußvorrichtung die Schenkel des Trägers übergreifen und wobei der Mittelteil der Anschlußvorrichtung als Träger einer Anschlußkontaktfläche dient. Sofern vorgesehen ist, sowohl den U-förmigen Träger als auch die Anschlußvorrichtung aus Stahlblech herzustellen, kann es vorteilhaft sein, zumindest bei Anwendungen im oberen Bereich des vorgesehenen Nennstrombereiches die Schenkel des Trägers mit randseitig offenen Ausnehmungen im Bereich eines dem bewegbaren Anschlußbolzen der zugehörigen Vakuumschaltröhre mit der Anschlußvorrichtung verbindenden biegsamen Leiters zu versehen. Auf diese Weise wird im Bereich des biegsamen Leiters der Querschnitt des geschlossenen Eisenkreises derart geschwächt, daß die Erwärmung aufgrund von Wirbelströmen ein zulässiges Maß nicht überschreitet.At normal heating values, the connection device can advantageously be designed as a U-shaped stamped and bent part with a central part and legs, the legs of the Connection device overlap the legs of the carrier and wherein the central part of the connection device serves as a carrier of a connection contact surface. If it is intended to manufacture both the U-shaped support and the connection device from sheet steel, it can be advantageous, at least in the case of applications in the upper region of the intended nominal current range, to have the legs of the support with recesses open at the edge in the region of one of the movable connecting bolts of the associated vacuum interrupter to provide the flexible conductor connecting the connecting device. In this way, the cross section of the closed iron circuit is weakened in the region of the flexible conductor in such a way that the heating due to eddy currents does not exceed a permissible level.
Für höhere Nennströme, die zu einer stärkeren Erwärmung führen, empfiehlt es sich, die Anschlußvorrichtung als einen mit Kühlrippen versehenen U-förmigen Metall-Gußkörper auszubilden, der Schenkel zum Übergreifen der Schenkel des Trägers und ein von Rippen freies Mittelteil als Träger einer Anschlußkontaktfläche besitzt.For higher rated currents, which lead to greater heating, it is advisable to design the connection device as a U-shaped cast metal body provided with cooling fins, the leg for overlapping the legs of the carrier and a central part free of ribs as the carrier of a connection contact surface.
Die Erfindung wird im folgenden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to the exemplary embodiments shown in the figures.
Die Figur 1 zeigt in einer Seitenansicht einen Pol eines Vakuum-Leistungsschalters mit den zur Befestigung dienenden Stützisolatoren, jedoch ohne Antriebsvorrichtung.FIG. 1 shows a side view of a pole of a vacuum circuit breaker with the support insulators used for fastening, but without a drive device.
Die Figuren 2, 3 und 4 zeigen in einer Seitenansicht, einer Stirnansicht und in der Draufsicht den Träger einer Polantriebseinheit des Leistungsschalters gemäß der Figur 1.FIGS. 2, 3 and 4 show the carrier of a pole drive unit of the circuit breaker according to FIG. 1 in a side view, an end view and a top view.
In den Figuren 5, 6 und 7 ist eine als Blechteil ausgebildete brückenartige Anschlußvorrichtung in einer Stirnansicht, einer Seitenansicht und im Querschnitt gezeigt.FIGS. 5, 6 and 7 show a bridge-like connecting device designed as a sheet metal part in a front view, a side view and in cross section.
Die Figur 8 zeigt in einer Seitenansicht einen Vakuum-Leistungsschalter mit einer als Rippen-Gußkörper ausgebildeten Anschlußvorrichtung.FIG. 8 shows a side view of a vacuum circuit breaker with a connecting device designed as a rib cast body.
Die Figuren 9, 10 und 11 zeigen die Anschlußvorrichtung des Leistungschalters gemäß der Figur 8 als Einzelteil in einer Seitenansicht, einer Stirnansicht und in der Draufsicht.FIGS. 9, 10 and 11 show the connection device of the circuit breaker according to FIG. 8 as an individual part in a side view, a front view and a top view.
Die in der Figur 1 gezeigte Poleinheit 1 umfaßt eine Vakuumschaltröhre 2, einen Polkopf 3 mit einer oberen Anschlußvorrichtung 4 sowie eine Polantriebseinheit 5 mit einer unteren Anschlußvorrichtung 6. Der Polkopf 3 und die Polantriebseinheit 5 sind zur Versteifung mit zwei vorderen isolierenden Stützstreben 7 und einer hinteren isolierenden Stützstrebe 8 verbunden. Ferner sind an dem Polkopf 3 und der Polantriebseinheit 5 jeweils ein Stützisolator 10 befestigt. Die Stützisolatoren 10 dienen zur Anbringung der Poleinheit 1 an einem nicht gezeigten geerdeten Antriebskasten, der eine Antriebsvorrichtung für die Poleinheit 1 enthält. Ist ein Vakuumschalter mehrpolig ausgebildet, so werden mehrere Polantriebseinheiten 5 mit Vakuumschaltröhren 2 mittels Stützisolatoren 10 an einem gemeinsamen Antriebskasten (vgl. Antriebskasten 51 in der Figur 8) befestigt.The
Die Polantriebseinheit 5 enthält eine Hebelanordnung, die einen oberen Kniehebel 11, einen unteren Kniehebel 12 und einen Stützhebel umfaßt. Mit dem unteren Kniehebel 12 ist eine in der Figur 1 nicht gezeigte, jedoch in der Figur 8 sichtbare isolierende Koppelstange 14 zu verbinden. Der Stützhebel 13 ist um einen Lagerbolzen 15 schwenkbar und liegt im Ausschaltzustand der Vakuumschaltröhre 2 unter dem Einfluß einer als Schraubendruckfeder ausgebildeten Kontaktkraftfeder 16 an einem Widerlager 17 an. Ausgehend von der dargestellten Lage der Teile wird die Vakuumschaltröhre 2 in ihre Einschaltstellung überführt, indem in den unteren Kniehebel 12 in Richtung des Pfeiles 20 eine Antriebskraft eingeleitet wird.The pole drive unit 5 contains a lever arrangement which comprises an
Die Kniehebel 11 und 12 werden hierdurch in eine Stellung nahe Strecklage überführt, wobei der Stützhebel 13 von dem Widerlager 17 abgehoben wird, nachdem sich die Schaltkontakte der Vakuumschaltröhre 2 berührt haben.The toggle levers 11 and 12 are thereby brought into a position close to the extended position, the
Wie die Figur 1 zeigt, weist die Polantriebseinheit 5 einen aus Stahlblech bestehenden Träger 21 auf, der näher in den Figuren 2, 3 und 4 dargestellt ist. Wie diese Figuren zeigen, weist der Träger 21 bei U-förmiger Grundform zwei Schenkel 22 und einen Mittelteil 23 auf. Der Mittelteil 23 ist den Stützisolatoren 10 (Figur 1) zugewandt. Die hintere Stützstrebe 8 ist durch zwei Zapfen 24 an dem Mittelteil 23 formschlüssig verbunden. Der an dem Mittelteil 23 anliegende Abschnitt der Stützstrebe 8 dient zugleich als Auflage für den unteren Stützisolator 10. Durch eine in der Figur 1 angedeutete Befestigungsschraube 25 werden somit gleichzeitig der untere Stützisolator 10 und die Stützstrebe 8 an der Polantriebseinheit 5 befestigt. Die Kanten 28 des Mittelteiles 23 sind zur Versteifung und zugleich zur elektrischen Entlastung abgerundet ausgebildet.As FIG. 1 shows, the pole drive unit 5 has a
Zur geradlinigen Führung eines unteren Anschlußbolzens 26 der Vakuumschaltröhre 2 sind die Schenkel 22 des Trägers 21 mit fluchtenden Langlöchern 27 (Figur 2) versehen. In diese Langlöcher greifen die Enden eines den oberen Kniehebel 11 mit dem bewegbaren Anschlußbolzen 26 gelenkig verbindenden Führungsbolzens 30 ein (Figur 1). Oberhalb der Langlöcher 27 befinden sich in den Schenkeln 22 Durchbrechungen 31, durch die eine Klemmvorrichtung 32 zugänglich ist, die zur Verbindung eines biegsamen Leiters 33 mit dem bewegbaren Anschlußbolzen 26 dient. Das andere Ende des biegsamen Leiters 33 endet bei einer zu der Anschlußvorrichtung 6 gehörenden Anschlußkontaktfläche 34. Weitere Merkmale des Trägers 21 sind gemäß der Figur 2 im unteren Bereich der Schenkel 22 schmale rechteckige Durchbrechungen 35, die zum Eingreifen entsprechend geformter Zapfen 36 des plattenförmigen Widerlagers 17 der Kontaktkraftfeder 16 besitzen. Zur Montage des Widerlagers 17 ist der Träger 21 so bemessen, daß sich die Schenkel 22 elastisch spreizen lassen, um die Zapfen 36 in den Bereich der Durchbrechungen 35 fluchtend zu positionieren. Nach der Aufhebung der Spreizkraft ist das Widerlager 17 zwischen den Schenkeln 22 fest eingespannt.In order to guide a lower connecting
Am oberen Rand besitzen die Schenkel 22 des Trägers 21 Ausnehmungen 37, die auf die Längsachse der Vakuumschaltröhre 2 ausgerichtet sind und die zum Eingreifen eines zentrierenden Auflagers 38 für die Vakuumschaltröhre 2 vorgesehen sind. Ein weiteres Merkmal des Trägers 21 ist eine in dem Mittelteil 23 angeordnete fensterartige Durchbrechung 40, die zum Durchtritt der in der Figur 8 gezeigten isolierenden Koppelstange 14 dient, die in der erwähnten Weise mit dem unteren Kniehebel 12 zu verbinden ist. Ferner sind die Schenkel 22 mit randseitig offenen Ausnehmungen 41 versehen, die sich in dem Bereich befinden, der von dem biegsamen Stromband 33 durchgriffen wird. Zweck dieser Ausnehmungen ist es, den Querschnitt des magnetischen Kreises zu schwächen, der um die Strombahn gebildet wird, wenn sowohl der Träger 21 als auch die anhand der Figuren 5, 6 und 7 noch zu beschreibende Anschlußvorrichtung 6 aus einem magnetisch leitfähigen Werkstoff bestehen.At the upper edge, the
Die Anschlußvorrichtung 6 gemäß den Figuren 5, 6 und 7 ist gleichfalls ein im Querschnitt U-förmiges Blechteil mit einer an den Träger 21 derart angepaßten Gestalt, daß es mit seinen Schenkeln 43 die Schenkel 22 des Trägers 21 übergreift. Löcher 44 in den Schenkeln 43 sind für eine Schraubverbindung vorgesehen. An der Stirnseite ist die Anschlußvorrichtung 6 im oberen Teil zum Durchtritt des Strombandes 33 offen ausgebildet. Im unteren Teil befindet sich ein die Schenkel 43 verbindender Mittelsteg 45 zur Auflage des mit der Anschlußkontaktfläche 34 versehenen Endes des biegsamen leiters 33. Die oberen Enden der Schenkel 43 sind mit abgebogenen Lappen 46 zur Befestigung der beiden vorderen isolierenden Stützstreben 7 vorsehen.The connecting
Durch die Anschlußvorrichtung 6 wird der Träger 21 derart versteift, daß trotz eines verhältnismäßig geringen Materialquerschnittes eine ausreichende Festigkeit erzielt wird, um die auftretenden Kräfte ohne störende Verformungen zuverlässig aufzunehmen. Auch bleibt die Erwärmung des Trägers 21 und der Anschlußvorrichtung 6 aufgrund der Ausnehmungen 41 in den Schenkeln 21 gering. Soll jedoch der beschriebene Vakuum-Leistungsschalter im Bereich sehr hoher Nennströme betrieben werden, so kann die aus der Vakuumschaltröhre 2 abzuführende Wärme über den bewegbaren Anschlußbolzen 26 von den beschriebenen Teilen nicht vollständig abgeführt werden. In diesem Fall empfiehlt es sich, eine Gestaltung der Anschlußvorrichtung gemäß der Figur 8 und den Figuren 9, 10 und 11 zu wählen.Through the connecting
In der Figur 8 ist schematisch ein vollständiger Vakuum-Leistungsschalter mit einer Poleinheit 50, einer Antriebsvorrichtung 51 sowie mit die Poleinheit 50 und die Antriebsvorrichtung 51 verbindenden Stützisolatoren 52 gezeigt. Unterschiedlich gegenüber der Figur 1 ist die Gestaltung einer an dem Träger 21 der Polantriebseinheit angebrachten Anschlußvorrichtung 53. Diese ist zur Vergrößerung ihrer Oberfläche zwecks besserer Wärmeabgabe an die Umgebung als mit Rippen versehener Metall-Gußkörper ausgebildet. Einzelheiten dieser Gestaltung zeigen die Figuren 9, 10 und 11.FIG. 8 schematically shows a complete vacuum circuit breaker with a
Ähnlich der Anschlußvorrichtung 6 gemäß den Figuren 5, 6 und 7 ist die Anschlußvorrichtung 53 im Querschnitt U-förmig ausgebildet derart, daß Schenkel 54 über die Schenkel 22 des Trägers 21 greifen. Rippen 55 erstrecken sich teilweise über nahezu die ganze Höhe des Trägers 21, und, soweit es die in den Schenkeln 22 des Trägers 21 vorgesehenen Durchbrechungen zulassen, auch über die Breite der Schenkel 22. Ein Mittelsteg 56 zwischen den Schenkeln 53 dient ähnlich wie bei der Anschlußvorrichtung 6 zur Auflage des Endes eines biegsamen Strombandes. Der Figur 8 ist noch zu entnehmen, daß in einer den Figuren 9, 10 und 11 entsprechenden Weise auch der Polkopf 57 mit Rippen versehen ist, um auch am oberen Ende der Vakuumschaltröhre 2 für eine verbesserte Wärmeabfuhr zu sorgen.Similar to the connecting
Claims (8)
- Vacuum switch having the following features:- a drive arrangement (51) for providing a driving force for at least one vacuum switching tube (2);- a pole drive unit (5), which receives the vacuum switching tube (2) at its one end and consists of a carrier (21), of a lever arrangement (11, 12) diverting the direction of movement of the drive arrangement (51), and a connection arrangement (6, 53) for connecting a movable driving plunger (26) of the vacuum switching tube (2) with an external conductor;- the carrier (21) is formed as a U-shaped sheet-metal portion having a central portion (23) and two limbs (22);- a support insulator (10; 52) for connecting the drive arrangement (51) with the carrier (21) is secured by means of its one end to the central portion (23) of the carrier (21);- arranged in the limbs (22) of the carrier (21) there are aligned elongated holes (27) for receiving the ends of a guide pin (30) which guides the driving plunger (26) of the vacuum switching tube (2) in a linear manner and transmits a driving force;- an insulating coupling rod (14) for connecting the drive arrangement (51) with the diverting lever arrangement, and- a contact force spring (16) which is to be tensioned when the vacuum switching tube (2) is switched on and also an abutment (17) which supports the one end of the contact force spring (16) is arranged between the limbs (22) of the carrier (21), characterised by the following further features:- the distance between the limbs (22) of the carrier (21) can be extended by elastic bending;- the abutment (17) of the contact force spring (16) is fixedly arranged and is formed in the shape of a plate with a width which corresponds to the distance between the limbs (22) in the state of rest;- arranged on the narrow sides of the abutment (17) intended to rest against the limbs (22) of the carrier (21) there are pegs (36) for engagement into associated openings (35) of the limbs (22) and- the connection arrangement (6; 53) is formed as an assembly which connects and reinforces the limbs (22).
- Vacuum switch according to claim 1, characterised in that openings (31) are arranged in the limbs (22) of the carrier (21) as an access opening to a clamping arrangement (32) on the movable driving plunger (26) of the vacuum switching tube (2).
- Vacuum switch according to claim 1, characterised in that the support insulator (10) is secured close to the end of the carrier (21), which faces the vacuum switching tube (2), with insertion of an insulating support strut (8) at the central portion (23) of the carrier (21), and in that the edge (28) of the central portion (23) at the end of the carrier (21) is formed so as to be rounded and/or bent.
- Vacuum switch according to claim 3, characterised in that the support strut (8) and the central portion (23) of the carrier are connected together by means of form-closure (24).
- Vacuum switch according to one of the preceding claims, characterised in that the limbs (23) of the carrier (21) are provided with recesses (37), which are open towards the edge and are aligned with the longitudinal axis of the pole drive unit (5), for the insertion of a centering support (38) of the associated vacuum switching tube (2).
- Vacuum switch according to one of the preceding claims, characterised in that the connection arrangement (6) is formed as a U-shaped stamped-bent portion with a central web (45) and limbs (43), with the limbs (43) of the connection arrangement (6) engaging over the limbs (22) of the carrier (21) and with the central web (45) of the connection arrangement (6) being used as a carrier of a connecting contact surface (34).
- Vacuum switch according to claim 6, characterised in that the limbs (22) of the carrier (21) have recesses (41) which are open on the edge side in the region of a flexible conductor (33) connecting the movable connecting pin (26) of the associated vacuum switching tube (2) with the connection arrangement (6).
- Vacuum switch according to one of the preceding claims, characterised in that the connection arrangement (53) is formed as a U-shaped cast-metal body which is provided with cooling ribs (55) and has limbs (53) for engagement over the limbs (22) of the carrier (21) and a central portion (56) free of ribs as a carrier of a connecting contact surface.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4133091 | 1991-09-30 | ||
| DE4133091A DE4133091C2 (en) | 1991-09-30 | 1991-09-30 | Vacuum switch with a drive device and a pole drive unit |
| PCT/DE1992/000784 WO1993007634A1 (en) | 1991-09-30 | 1992-09-11 | Vacuum switch with a drive device and a pole operating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0606264A1 EP0606264A1 (en) | 1994-07-20 |
| EP0606264B1 true EP0606264B1 (en) | 1995-07-19 |
Family
ID=6442132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92919429A Expired - Lifetime EP0606264B1 (en) | 1991-09-30 | 1992-09-11 | Vacuum switch with a drive device and a pole operating unit |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5512724A (en) |
| EP (1) | EP0606264B1 (en) |
| JP (1) | JPH06510625A (en) |
| CA (1) | CA2120150A1 (en) |
| DE (2) | DE4133091C2 (en) |
| DK (1) | DK0606264T3 (en) |
| ES (1) | ES2075715T3 (en) |
| WO (1) | WO1993007634A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19508770C1 (en) * | 1995-03-01 | 1996-08-22 | Siemens Ag | Storage drive for a high-voltage circuit breaker pole filled with insulating gas |
| DE19525288C2 (en) * | 1995-07-03 | 2002-08-01 | Siemens Ag | Multipole vacuum switch with parallel poles |
| DE19525286C2 (en) * | 1995-07-03 | 2002-08-01 | Siemens Ag | Multipole vacuum switch with a drive device |
| TW389919B (en) * | 1995-09-27 | 2000-05-11 | Hitachi Ltd | Insulated type switching device |
| DE19850202A1 (en) | 1998-10-23 | 2000-04-27 | Siemens Ag | Electrical switchgear with individual vacuum switch housings |
| DE19850207A1 (en) * | 1998-10-23 | 2000-04-27 | Siemens Ag | Insulated carrier for securing vacuum-contactors especially of medium voltage control and switch-gear |
| JP2000268683A (en) * | 1999-01-14 | 2000-09-29 | Toshiba Corp | Operating device for switch |
| JP3755639B2 (en) * | 2000-02-17 | 2006-03-15 | 三菱電機株式会社 | Switchgear |
| DE10056646C1 (en) * | 2000-11-09 | 2002-03-28 | Siemens Ag | Receiving device used for switching tubes of power switches, comprises a shell-like insulating housing comprising thin wall insulating struts, thick wall struts and a support provided in the back wall region |
| DE10144438C1 (en) * | 2001-09-05 | 2003-05-28 | Siemens Ag | Drive device for a switching tube with a fixed and a movable contact part |
| DE102004050786C5 (en) * | 2004-10-14 | 2008-03-06 | Siemens Ag | Coupling device with heat sink |
| MX2008001885A (en) * | 2005-08-10 | 2008-03-24 | Siemens Ag | Switch pole with supporting frame having latching means. |
| DE102006015308A1 (en) * | 2006-03-29 | 2007-10-11 | Siemens Ag | Insulating shift rod |
| ES2628442T3 (en) * | 2012-07-02 | 2017-08-02 | Abb Schweiz Ag | Polar circuit breaker with a heat transfer protector |
| US9905382B2 (en) * | 2013-12-26 | 2018-02-27 | Kabushiki Kaisha Saginomiya Seisakusho | Swaging structure |
| KR101870016B1 (en) * | 2016-02-16 | 2018-07-23 | 엘에스산전 주식회사 | Bypass Switch |
| DE102017222413A1 (en) * | 2017-12-11 | 2019-06-13 | Siemens Aktiengesellschaft | Overpressure-resistant vacuum interrupter |
| KR102159960B1 (en) * | 2019-02-22 | 2020-09-25 | 엘에스일렉트릭(주) | Pole part and circuit breaker having the same |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632933A (en) * | 1970-03-25 | 1972-01-04 | Esco Mfg Co | Rack and gear spring charging means for reciprocating contact |
| DE2254812A1 (en) * | 1971-11-27 | 1973-05-30 | Inst Prueffeld Elekt | HIGH VOLTAGE SWITCH WITH REMOVABLE DRIVE |
| GB1576211A (en) * | 1977-04-04 | 1980-10-01 | Ass Elect Ind | Actuating mechanisms for vacuum interrupters |
| DE2717958B2 (en) * | 1977-04-20 | 1979-06-13 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Drive device for electrical switching devices with pressure contacts |
| US4419553A (en) * | 1981-01-19 | 1983-12-06 | Mitsubishi Denki Kabushiki Kaisha | Vacuum type circuit breaker |
| DE3218907A1 (en) * | 1982-05-19 | 1983-11-24 | Sachsenwerk, Licht- und Kraft-AG, 8000 München | Method and arrangement for switching vacuum switches |
| DE3475243D1 (en) * | 1984-05-18 | 1988-12-22 | Sprecher Energie Ag | Vacuum interrupter |
| EP0172986B1 (en) * | 1984-08-31 | 1990-12-27 | Sprecher Energie AG | Operating device for an electrical switch with pressure contacts, particularly for a vacuum switch |
| JPH02281521A (en) * | 1989-03-16 | 1990-11-19 | Sprecher Energ Ag | Multipole vacuum breaker and insulating support frame for multipole vacuum breaker |
| DE8905949U1 (en) * | 1989-05-11 | 1990-09-13 | Siemens AG, 1000 Berlin und 8000 München | Multipole vacuum circuit breaker with an insulating support arrangement for the switching tubes |
| JPH06215672A (en) * | 1993-01-20 | 1994-08-05 | Toshiba Corp | Vacuum circuit breaker |
-
1991
- 1991-09-30 DE DE4133091A patent/DE4133091C2/en not_active Expired - Fee Related
-
1992
- 1992-09-11 US US08/211,366 patent/US5512724A/en not_active Expired - Fee Related
- 1992-09-11 DE DE59202980T patent/DE59202980D1/en not_active Expired - Fee Related
- 1992-09-11 ES ES92919429T patent/ES2075715T3/en not_active Expired - Lifetime
- 1992-09-11 DK DK92919429.8T patent/DK0606264T3/en active
- 1992-09-11 CA CA002120150A patent/CA2120150A1/en not_active Abandoned
- 1992-09-11 JP JP5501725A patent/JPH06510625A/en active Pending
- 1992-09-11 EP EP92919429A patent/EP0606264B1/en not_active Expired - Lifetime
- 1992-09-11 WO PCT/DE1992/000784 patent/WO1993007634A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ES2075715T3 (en) | 1995-10-01 |
| DK0606264T3 (en) | 1995-12-18 |
| DE4133091A1 (en) | 1993-04-08 |
| US5512724A (en) | 1996-04-30 |
| EP0606264A1 (en) | 1994-07-20 |
| CA2120150A1 (en) | 1993-04-15 |
| DE59202980D1 (en) | 1995-08-24 |
| JPH06510625A (en) | 1994-11-24 |
| DE4133091C2 (en) | 1995-06-01 |
| WO1993007634A1 (en) | 1993-04-15 |
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