EP0291668B1 - Control mechanism for a load break switch - Google Patents

Control mechanism for a load break switch Download PDF

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Publication number
EP0291668B1
EP0291668B1 EP88104945A EP88104945A EP0291668B1 EP 0291668 B1 EP0291668 B1 EP 0291668B1 EP 88104945 A EP88104945 A EP 88104945A EP 88104945 A EP88104945 A EP 88104945A EP 0291668 B1 EP0291668 B1 EP 0291668B1
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EP
European Patent Office
Prior art keywords
switching
switching arm
arm
latch
locking
Prior art date
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.)
Expired - Lifetime
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EP88104945A
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German (de)
French (fr)
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EP0291668A1 (en
Inventor
Nikolaus Obsommer
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ELEK GmbH
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ELEK GmbH
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Publication date
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Priority to AT88104945T priority Critical patent/ATE62768T1/en
Publication of EP0291668A1 publication Critical patent/EP0291668A1/en
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Publication of EP0291668B1 publication Critical patent/EP0291668B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release

Definitions

  • the invention relates to a switching mechanism of a circuit breaker according to the preamble of claim 1 and is based on DE-A-1'765'380.
  • Switch-disconnector type LK Another such switching mechanism is e.g. known from the brochure "Switch-disconnector type LK" from ELEK GmbH, Düsseldorf.
  • the drive mechanism of a compact load-break switch is presented with a long switch lever 16, which is freely movable and connected to a short rotary lever.
  • An actuating handle is coupled to this rotary lever.
  • a hexagonal elongated switching carriage 15 and two resiliently clamped switching links 17 By means of a hexagonal elongated switching carriage 15 and two resiliently clamped switching links 17, a snap shift is achieved, i.e. As soon as a certain dead point is exceeded when switching, switching off or on can no longer be prevented. There are therefore two stable switching states.
  • the sliding carriage 15 is fixedly connected to a formwork piece which acts on a shift lever 13 via an upper shift axis 14. As a result, the linear movement of the shift carriage 15 is converted into a rotational movement of the shift lever 13. The contact is guided by guides in the housing so that 3 or 4 poles can be switched.
  • a forced release (bimetal release) is not provided and is also not possible with the specified switching mechanism.
  • a switch lock for electrical switching devices, in particular load and power isolating switches, with a quick-switching device for quick switching on or off is known, which by means of a toggle lever system non-positively connects a drive shaft to a switching shaft, the lock of which after tensioning a switching spring is controlled by a trigger device.
  • the switch lock connecting the drive shaft 3 to the control shaft 2 is designed as a toggle lever joint consisting of a link and a bracket.
  • a trigger shaft is arranged in the point of articulation of a crank mechanism that cannot be influenced by the driving forces.
  • the object of the invention is to provide a switching mechanism of the type mentioned above which has two stable switching states and at the same time enables forced triggering.
  • the switching mechanism according to the invention has the great advantage that it multiplies the switch-on force on the switching system of the switch and at the same time enables a very simple forced release.
  • the specified switching mechanism has proven particularly useful for linear switches, as are known from DE-A-3402371 and DE-A-3402372 from Doduco KG, Pforzheim.
  • Another advantage of the switching mechanism is the combination of forced triggering even when the control handle is blocked and normal switching by means of the control handle.
  • FIGS. 1 and 2 show a switching mechanism which essentially consists of a long switching arm 1, a short switching arm 2 and a switching lock 3.
  • the long switching arm 1 and the short switching arm 2 are movably interlocked.
  • a rotatable cam 4 At the end of the long switching arm 1 there is a rotatable cam 4, which is surrounded by a recess or square hole 5 at the end of the short switching arm 2.
  • the short switching arm 2 is designed as a hinge and consists of two partially overlapping hinge pieces 2a, 2b which are rotatably connected to one another via a hinge axis 6. Between the overlapping parts of the hinge 2 there is a compression spring 7 which pushes the hinge 2 apart.
  • a square axis of rotation 8 At the other end of the short switching arm 2 there is a square axis of rotation 8, on which a switching handle (not shown here) with a compression spring is attached.
  • the square axis of rotation 8 is chamfered at one corner.
  • the control handle has a corresponding recess, so that it can only be attached to the axis of rotation in one way.
  • the axis of the control handle and the cylindrical bushing in the housing each have a semicircular bead, such that the control handle can only be rotated in one direction after it has been released.
  • a projection 9 is provided which runs onto a wedge 10. This wedge 10 is firmly connected to the switch housing.
  • the key switch 3 consists of a rotatable elongated support lever 11 and a rotatable angular roller lever 12, the angle of which forms the fulcrum.
  • a pin 13 is provided, which is held captive in a locking corner 14 of the support lever 11 by the end of the long switching arm 1 (FIG. 1).
  • the long switching arm 1 is biased downwards by compression springs, not shown.
  • the end of the long switching arm 1 is pointed with a rounded top edge and a bottle bottom edge.
  • a stop 15 limits the rotation of the roller lever 12 counterclockwise (Fig. 2).
  • At the pivot point of the roller lever 12 there is a hook 16 on which a tension spring 17 is attached to the support lever 11.
  • Bracket 18 Between the short lever arm 2 and the support lever 11 there is a bracket 18 which enables manual switching off.
  • the bracket (18) is guided in the support lever (11) in an elongated link (11a).
  • a switching carriage 20 is shown in the top view.
  • the switching carriage 20 has a rotatable cam 21 in the middle, which is constantly surrounded by a recess, an elongated square hole 22 in the middle of the switching arm 1.
  • guide slots 23 - shown only schematically here - which bring about a linear movement of the switching carriage 20.
  • the long switching arm 1 is rotatably supported at its other end about an axis of rotation 24.
  • a longitudinal slot 25 is provided in the switching carriage 20 at the corresponding point, so that the switching carriage 20 is not prevented from moving by the axis of rotation 24.
  • Two double - shown in dashed lines - guide ribs 26 are each provided at the end of the center line of the switching carriage 20.
  • FIG. 4 shows a cross section through the switching slide 20 and the switch housing 27 according to the line AA in FIG. 3.
  • the switch housing 27 is divided into four switching chambers 28, each of which contains an electrical switching element 29.
  • Such an electrical switching element 29 is described in detail in DE-A-3402372.
  • the reference numbers and figures now given in brackets refer to the description there.
  • the switched-on state (FIG. 1), the intermediate stage of the arc quenching (FIG. 2) and the switched-off state (FIG. 3) are shown.
  • the rigid axis with the two cylindrical electrodes (1 and 2) is fixed, and the sleeve (10) moves when switched on or off.
  • Four switching bars (5, only two are shown) surround the rigid axis and are taken away from the sleeve (10).
  • the sleeves (10) are inverted over the rigid axis with the electrodes (1 and 2). Between the conical end with the shoulder of the sleeve (10) and the wall of the switching chamber 28, a compression spring - not shown here - is now arranged. If no force is exerted on the sleeve (10), the electrical switching element 29 is thus switched off. Switching webs 30 are arranged on the switching slide 20, which correspond locally to the guide slots 23 in the switch housing. The switching webs 30 are approximately the same length as the diameter of an electrical switching element 29. The switching slide 20 thus takes the sleeves (10) with them when they are switched on. The compression springs on the electrical switching elements 29 now cause the above-mentioned pretensioning on the long switching arm 1.
  • a guide rail 31 is attached above the entire width of the switch housing 27 under the housing wall. This guide rail 31 is encompassed by the two double guide ribs 26, so that tilting of the switching slide 20 is prevented.
  • the pointed end of the long switching arm 1 pushes the pin 13 away to the left, so that the long switching arm 1 can jump down.
  • the rotatable cam 4 is at the top and the short switching arm 2 is chamfered at a corresponding point below, so that the two switching arms 1 and 2 interlock again.
  • the bracket 18 acts in the same way on the support lever 11, so that it can also be switched off normally with the control handle.

Abstract

In a control mechanism for a load isolator having a rotating control handle (1) and two control arms (1, 2), it is proposed that the first control arm (1) should be pretensioned by means of spring force and that a latching mechanism (3) be provided, at least one of the control arms (1, 2) latching directly into the latching mechanism (3). The two control arms (1, 2) are each supported rotatably on their one end in the same plane, and engage with one another, such that they can move, at their other end. The latching mechanism (3) in this case consists essentially of a supporting lever (11) having a locking corner (14), and of a roller lever (12), having a pin (13). The end of the first control arm (1) is designed as a tip, so that the pin (13) is clamped in the locking corner (14) in the switched-on state. <IMAGE>

Description

Die erfindung betrifft einen Schaltmechanismus eines Leistungs-Trennschalters nach dem Oberbegriff des Patentanspruchs 1 und geht von der DE-A-1′765′380 aus.The invention relates to a switching mechanism of a circuit breaker according to the preamble of claim 1 and is based on DE-A-1'765'380.

Ein weiterer solcher Schaltmechanismus ist z.B. bekannt aus dem Prospekt "Last-Trennschalter Typ LK" der Firma ELEK GmbH, Düsseldorf. Dort wird der Antriebmechanismus eines kompakten Last-Trenn-Shalters vorgestellt mit einem langen Shalthebel 16, der frei bewegbar mit einem kurzen Drehhebel verbunden ist. An diesem Drehhebel ist ein Betätigungsgriff angekoppelt. Mittels eines sechskantigen länglichen Schaltschlittens 15 und zwei federnd eingespannten Schaltkulissen 17 wird eine Sprungschaltung erreicht, d.h. sobald beim Schalten ein bestimmter toter Punkt überschritten wird, kann ein Aus- oder Einschalten nicht mehr verhindert werden. Es ergeben sich deshalb zwangsläufig zwei stabile Schaltzustände.Another such switching mechanism is e.g. known from the brochure "Switch-disconnector type LK" from ELEK GmbH, Düsseldorf. There, the drive mechanism of a compact load-break switch is presented with a long switch lever 16, which is freely movable and connected to a short rotary lever. An actuating handle is coupled to this rotary lever. By means of a hexagonal elongated switching carriage 15 and two resiliently clamped switching links 17, a snap shift is achieved, i.e. As soon as a certain dead point is exceeded when switching, switching off or on can no longer be prevented. There are therefore two stable switching states.

Der Schatschlitten 15 ist fest mit einem Schalstück verbunden, das über einer oberen Schaltachse 14 auf einen Schalthebel 13 einwirk. Dadurch wird die lineare Bewegung des Schaltschlittens 15 in eine Drehbewegung des Schalthebels 13 umgesetzt. Das Schaltstück wird dabei von Führungen im Gehäuse geführt, so dass 3- oder 4-polig geschaltet werden kann.The sliding carriage 15 is fixedly connected to a formwork piece which acts on a shift lever 13 via an upper shift axis 14. As a result, the linear movement of the shift carriage 15 is converted into a rotational movement of the shift lever 13. The contact is guided by guides in the housing so that 3 or 4 poles can be switched.

Abgesehen davon, dass der oben beschriebene Schaltmechanismus eine Drehbewegung in eine lineare Bewegung verwandeln muss, um den Kontakt zu bewirken, ist eine Zwangsauslösung (Bimetallauslösung) nicht vorgesehen und beim angegebenen Schaltmechanismus auch nicht möglich.In addition to the fact that the switching mechanism described above has to convert a rotary movement into a linear movement in order to bring about the contact, a forced release (bimetal release) is not provided and is also not possible with the specified switching mechanism.

Aus der DE-A-1 765 380 ist ein Schaltschloss für elektrische Schaltgeräte, insbesondere Last- und Leistungstrennschalter, mit einer Schnellschaltvorrichtung zum schnellen Aus- oder Einschalten bekannt, das mittels eines Kniehebelsystems eine Antriebswelle kraftschlüssig mit einer Schaltwelle verbindet, dessen Sperre nach dem Spannen einer Schaltfeder durch eine Auslösevorrichtung gesteuert wird. Das die Antriebswelle 3 mit der Schaltwelle 2 verbindende Schaltschloss ist als ein aus einem Lenker und einer Lasche bestehendes Kniehebelgelenk ausgebildet. Eine Auslösewelle ist im Gelenkpunkt des einen Kurbeltriebes von den Antriebskräften unbeeinflussbar angeordnet.From DE-A-1 765 380 a switch lock for electrical switching devices, in particular load and power isolating switches, with a quick-switching device for quick switching on or off is known, which by means of a toggle lever system non-positively connects a drive shaft to a switching shaft, the lock of which after tensioning a switching spring is controlled by a trigger device. The switch lock connecting the drive shaft 3 to the control shaft 2 is designed as a toggle lever joint consisting of a link and a bracket. A trigger shaft is arranged in the point of articulation of a crank mechanism that cannot be influenced by the driving forces.

Die Erfindung stellt sich nun die Aufgabe, einen Schaltmechanismus der oben genannten Art anzugeben, der zwei stabile Schaltzustände aufweist und gleichzeitig eine Zwangsauslösung ermöglicht.The object of the invention is to provide a switching mechanism of the type mentioned above which has two stable switching states and at the same time enables forced triggering.

Diese Aufgabe wird erfindungsgemäss gelöst durch die Merkmale des Patentanspruchs 1.According to the invention, this object is achieved by the features of patent claim 1.

Der erfindungsgemässe Schaltmechanismus hat den grossen Vorteil, dass er eine Vervielfachung der Einschaltkraft auf das Schaltsystem des Schalters bewirkt und gleichzeitig eine sehr einfache Zwangsauslösung ermöglicht.The switching mechanism according to the invention has the great advantage that it multiplies the switch-on force on the switching system of the switch and at the same time enables a very simple forced release.

Der angegebene Schaltmechanismus hat sich besonders bewährt für lineare Schalter, wie sie aus DE-A-3402371 und DE-A-3402372 der Firma Doduco KG, Pforzheim, bekannt sind.The specified switching mechanism has proven particularly useful for linear switches, as are known from DE-A-3402371 and DE-A-3402372 from Doduco KG, Pforzheim.

Ein anderer Vorteil des in den Unteransprüchen weiter gekennzeichneten Schaltmechanismus ist die Kombination von Zwangsauslösung auch bei blockiertem Schaltgriff und der normalen Schaltung mittels des Schaltgriffes.Another advantage of the switching mechanism, which is further characterized in the subclaims, is the combination of forced triggering even when the control handle is blocked and normal switching by means of the control handle.

Weitere Vorteile der Erfindung ergeben sich aus der nachstehenden Beschreibung. Dort wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Dabei zeigt:

  • Fig. 1 einen Teil eines Schaltmechanismus im eingeschalteten Zustand,
  • Fig. 2 denselben Teil des Schaltmechanismus im ausgeschalteten Zustand,
  • Fig. 3 einen Schaltschlitten und dessen Verankerung mit dem Schaltmechanismus, und
  • Fig. 4 denselben Schaltschlitten in einem Schaltergehäuse gemäss dem Schnitt A-A in Fig. 3.
Further advantages of the invention result from the description below. There, the invention is explained in more detail using an exemplary embodiment shown in the drawing. It shows:
  • 1 shows part of a switching mechanism in the switched-on state,
  • 2 the same part of the switching mechanism in the switched-off state,
  • Fig. 3 shows a shift carriage and its anchoring with the switching mechanism, and
  • 4 shows the same switching slide in a switch housing according to section AA in FIG. 3.

In den Figuren werden jeweils für dieselben Elemente die gleichen Bezugsziffern verwendet.In the figures, the same reference numbers are used for the same elements.

In den Figuren 1 und 2 ist ein Schaltmechanismus zu sehen, der im wesentlichen aus einem langen Schaltarm 1, einem kurzen Schaltarm 2 und einem Schaltschloss 3 besteht. Der lange Schaltarm 1 und der kurze Schaltarm 2 greifen bewegbar ineinander. Am Ende des langen Schaltarmes 1 befindet sich ein drehbarer Nocken 4, der von einer Ausnehmung oder viereckigem Loch 5 am Ende des kurzen Schaltarmes 2 umfasst ist. Der kurze Schaltarm 2 ist als Scharnier ausgebildet, und besteht aus zwei sich teilweise überlappenden Scharnierstücken 2a, 2b, die über eine Scharnierachse 6 drehbar miteinander verbunden sind. Zwischen den überlappenden Teilen des Scharniers 2 befindet sich eine Druckfeder 7, die das Scharnier 2 auseinanderdrückt. Am anderen Ende des kurzen Schaltarmes 2 ist eine vierkantige Drehachse 8 vorgesehen, auf der ein - hier nicht dargestellter - Schaltgriff mit einer Druckfeder aufgesteckt ist. Die vierkantige Drehachse 8 ist an einer Ecke angeschrägt. Der Schaltgriff besitzt eine dementsprechende Ausnehmung, so dass er nur auf eine Art auf die Drehachse aufgesteckt werden kann. Die Achse des Schaltgriffes und die zylinderische Durchführung im Gehäuse haben je einen halbrunden Wulst, derart, dass der Schaltgriff nach dem Ausklinken nur in eine Richtung drehbar ist. Auf der anderen Seite des kurzen Schaltarmes 2 ist ein Vorsprung 9 vorgesehen, der auf einen Auflaufkeil 10 aufläuft. Dieser Auflaufkeil 10 ist fest mit dem Schaltergehaüse verbunden. Das Schaltschloss 3 besteht aus einem drehbaren länglichen Stützhebel 11 und einem drehbaren winkelförmigen Rollenhebel 12, dessen Winkel der Drehpunkt bildet. Am einen Ende des Rollenhebels 12 ist ein Stift 13 vorgesehen, der in einer Verriegelungsecke 14 des Stützhebels 11 vom Ende des langen Schaltarmes 1 gefangengehalten wird (Fig. 1). Der lange Schaltarm 1 ist dabei von nicht dargestellten Druckfedern nach unten vorgespannt. Das Ende des langen Schaltarmes 1 ist sptiz ausgebildet mit einer abgerundeten oberen Kante und einer flaschen unteren Kante. Ein Anschlag 15 begrenzt die Drehung des Rollenhebel 12 im Gegenuhrzeigersinn (Fig. 2). Am Drehpunkt des Rollenhebels 12 befindet sich ein Haken 16, an dem eine Zugfeder 17 zum Stützhebels 11 angebracht ist. Zwischen dem kurzen Hebelarm 2 und dem Stützhebels 11 befindet sich ein Bügel 18, der ein manuelles Ausschalten ermöglicht. Der Bügel (18) ist im Stützhebel (11) in einer länglichen Kulisse (11a) geführt. Ein Auslösebügel 19, der mit einem nicht dargestellten Auslosemechanismus gekoppelt ist, ist ebenfalls am Stützhebel 11 eingehängt.FIGS. 1 and 2 show a switching mechanism which essentially consists of a long switching arm 1, a short switching arm 2 and a switching lock 3. The long switching arm 1 and the short switching arm 2 are movably interlocked. At the end of the long switching arm 1 there is a rotatable cam 4, which is surrounded by a recess or square hole 5 at the end of the short switching arm 2. The short switching arm 2 is designed as a hinge and consists of two partially overlapping hinge pieces 2a, 2b which are rotatably connected to one another via a hinge axis 6. Between the overlapping parts of the hinge 2 there is a compression spring 7 which pushes the hinge 2 apart. At the other end of the short switching arm 2 there is a square axis of rotation 8, on which a switching handle (not shown here) with a compression spring is attached. The square axis of rotation 8 is chamfered at one corner. The control handle has a corresponding recess, so that it can only be attached to the axis of rotation in one way. The axis of the control handle and the cylindrical bushing in the housing each have a semicircular bead, such that the control handle can only be rotated in one direction after it has been released. On the other side of the short switching arm 2, a projection 9 is provided which runs onto a wedge 10. This wedge 10 is firmly connected to the switch housing. The key switch 3 consists of a rotatable elongated support lever 11 and a rotatable angular roller lever 12, the angle of which forms the fulcrum. At one end of the roller lever 12, a pin 13 is provided, which is held captive in a locking corner 14 of the support lever 11 by the end of the long switching arm 1 (FIG. 1). The long switching arm 1 is biased downwards by compression springs, not shown. The end of the long switching arm 1 is pointed with a rounded top edge and a bottle bottom edge. A stop 15 limits the rotation of the roller lever 12 counterclockwise (Fig. 2). At the pivot point of the roller lever 12 there is a hook 16 on which a tension spring 17 is attached to the support lever 11. Between the short lever arm 2 and the support lever 11 there is a bracket 18 which enables manual switching off. The bracket (18) is guided in the support lever (11) in an elongated link (11a). A release bracket 19, which is coupled to a release mechanism, not shown, is also attached to the support lever 11.

In Fig. 3 ist ein Schaltschlitten 20 in Obenansicht angegeben. Der Schaltschlitten 20 hat in der Mitte einen drehbaren Nocken 21, der von einer Ausnehmung, einem länglichen viereckigen Loch 22 in der Mitte des Schaltarmes 1 ständig umgeben ist. Im Schaltergehäuse befinden sich Führungsschlitze 23 - hier nur schematisch dargestellt -, die eine lineare Bewegung des Schaltschlittens 20 bewirken. Der lange Schaltarm 1 ist an seinem anderen Ende um eine Drehachse 24 drehbar gelagert. Im Schaltschlitten 20 ist an der entsprechenden Stelle ein Längsschlitz 25 vorgesehen, so dass der Schaltschlitten 20 von der Drehachse 24 nicht in seiner Bewegung gehindert wird. Zwei doppelte - strichliert dargestellte - Führungsrippen 26 sind jeweils am Ende der Mittellinie des Schaltschlittens 20 vorgesehen.In Fig. 3, a switching carriage 20 is shown in the top view. The switching carriage 20 has a rotatable cam 21 in the middle, which is constantly surrounded by a recess, an elongated square hole 22 in the middle of the switching arm 1. In the switch housing there are guide slots 23 - shown only schematically here - which bring about a linear movement of the switching carriage 20. The long switching arm 1 is rotatably supported at its other end about an axis of rotation 24. A longitudinal slot 25 is provided in the switching carriage 20 at the corresponding point, so that the switching carriage 20 is not prevented from moving by the axis of rotation 24. Two double - shown in dashed lines - guide ribs 26 are each provided at the end of the center line of the switching carriage 20.

In Fig. 4 ist ein Querschnitt durch den Schaltschlitten 20 und das Schaltergehäuse 27 gemäss der Linie A-A in Fig. 3 gezeigt. Das Schaltergehäuse 27 ist in vier Schaltkammern 28 unterteilt, die je ein elektrisches Schaltelement 29 enthalten. Ein solches elektrisches Schaltelement 29 ist ausführlich beschrieben in DE-A-3402372. Die nun hier in Klammern angegeben Bezugsziffern und Figuren beziehen sich auf die dortige Beschreibung. Es sind der eingeschaltete Zustand (Fig. 1), das Zwischenstadium des Lichtbogen-Löschens (Fig. 2) und der ausgeschaltete Zustand (Fig. 3) dargestellt. Die starre Achse mit den beiden zylinderischen Elektroden (1 und 2) ist fixiert, und die Hülse (10) verschiebt sich beim Ein- oder Ausschalten. Vier Schaltstege (5, nur zwei sind dargestellt) umringen die starre Achse und werden von der Hülse (10) mitgenommen. Für diese Anwendung hier sind die Hülsen (10) umgekehrt über die starre Achse mit den Elektroden (1 und 2) gestülpt. Zwischen dem konischen Ende mit Absatz der Hülse (10) und der Wand der Schaltkammer 28 ist nun eine - hier nicht gezeichnete - Druckfeder angeordnet. Wenn keine Kraft auf die Hülse (10) ausgeübt wird, ist somit das elektrische Schaltelement 29 ausgeschaltet. Am Schaltschlitten 20 sind Schaltstege 30 angeordnet, die örtlich übereinstimmen mit den Führungsschlitzen 23 im Schaltergehäuse. Die Schaltstege 30 sind etwa gleich lang wie der Durchmesser eines elektrischen Schaltelementes 29. Der Schaltschlitten 20 nimmt somit die Hülsen (10) beim Einschalten mit. Die Druckfedern an den elektrischen Schaltelementen 29 bewirken nun die vorstehend genannte Vorspannung auf den langen Schaltarm 1. Eine Führungsschiene 31 ist oben unter der Gehäusewand über die ganze Breite des Schaltergehäuses 27 angebracht. Diese Führungsschiene 31 wird von den beiden doppelten Führungsrippen 26 umfasst, so dass ein Verkanten des Schaltschlittens 20 verhindert wird.FIG. 4 shows a cross section through the switching slide 20 and the switch housing 27 according to the line AA in FIG. 3. The switch housing 27 is divided into four switching chambers 28, each of which contains an electrical switching element 29. Such an electrical switching element 29 is described in detail in DE-A-3402372. The reference numbers and figures now given in brackets refer to the description there. The switched-on state (FIG. 1), the intermediate stage of the arc quenching (FIG. 2) and the switched-off state (FIG. 3) are shown. The rigid axis with the two cylindrical electrodes (1 and 2) is fixed, and the sleeve (10) moves when switched on or off. Four switching bars (5, only two are shown) surround the rigid axis and are taken away from the sleeve (10). For this application, the sleeves (10) are inverted over the rigid axis with the electrodes (1 and 2). Between the conical end with the shoulder of the sleeve (10) and the wall of the switching chamber 28, a compression spring - not shown here - is now arranged. If no force is exerted on the sleeve (10), the electrical switching element 29 is thus switched off. Switching webs 30 are arranged on the switching slide 20, which correspond locally to the guide slots 23 in the switch housing. The switching webs 30 are approximately the same length as the diameter of an electrical switching element 29. The switching slide 20 thus takes the sleeves (10) with them when they are switched on. The compression springs on the electrical switching elements 29 now cause the above-mentioned pretensioning on the long switching arm 1. A guide rail 31 is attached above the entire width of the switch housing 27 under the housing wall. This guide rail 31 is encompassed by the two double guide ribs 26, so that tilting of the switching slide 20 is prevented.

Die Funktionsweise des obigen Schaltmechanismus ist nun wie folgt:The operation of the above switching mechanism is now as follows:

Im eingeschalteten Zustand (Fig. 1) wird der Stift 13 vom Ende des langen Schaltarmes 1 in die Verriegelungsecke 14 des Stützhebels 11 eingeklemmt. Auf den langen Schaltarm 1 wirkt über den Schaltschlitten 20 die Kraft der gennanten Druckfedern, die sich ihrerseite auf den Hülsen (10) der elektrischen Schaltelemente 27 abstützen. Diese Druckfedern sind stark, um ein schnelles Ausschalten zu bewirken. Ihre Kraft wiegt längstens auf gegen die Kraft der schwachen Zugfeder 17. Der kurze Schaltarm 2 ist durch den Vorsprung 9 und den Auflaufkeil 10 abgehoben, so dass die beiden Schaltarme 1 und 2 nicht mehr ineinandergreifen. Dadurch kann nun der lange Schaltarm 1 unter den kurzen Schaltarm 2 durchgehen. Dies bedeutet, dass eine Zwangsaugslösung über den Auslösebügel 19 auch bei blockiertem Schaltgriff - und blockiertem kurze Schaltarm 2 - stattfinden kann. Bei der Auslösung drückt das spitze Ende des langen Schaltarmes 1 den Stift 13 nach links weg, so dass der lange Schaltarm 1 nach unten springen kann. Der drehbare Nocken 4 ist oben und der kurze Schaltarm 2 ist an entsprechender Stelle unten angeschrägt, so dass die beiden Schaltarme 1 und 2 wieder ineinandergreifen. Der Bügel 18 wirkt auf die gleiche Art auf den Stützhebel 11, so dass auch normal mit dem Schaltgriff ausgeschaltet werden kann.In the switched-on state (FIG. 1), the pin 13 is clamped into the locking corner 14 of the support lever 11 from the end of the long switching arm 1. The force of the compression springs mentioned, which are supported on the sleeves (10) of the electrical switching elements 27, acts on the long switching arm 1 via the switching slide 20. These compression springs are strong in order to switch them off quickly. Their force weighs at the longest against the force of the weak tension spring 17. The short switching arm 2 is lifted off by the projection 9 and the ramp wedge 10, so that the two switching arms 1 and 2 no longer interlock. As a result, the long switching arm 1 can now pass under the short switching arm 2. This means that a forced suction solution can take place via the release bracket 19 even when the control handle is blocked - and the short switching arm 2 is blocked. When triggered the pointed end of the long switching arm 1 pushes the pin 13 away to the left, so that the long switching arm 1 can jump down. The rotatable cam 4 is at the top and the short switching arm 2 is chamfered at a corresponding point below, so that the two switching arms 1 and 2 interlock again. The bracket 18 acts in the same way on the support lever 11, so that it can also be switched off normally with the control handle.

Claims (10)

1. Switching mechanism of a power isolating switch with a rotary control handle, as well as a first (1) and a second (2) switching arms, one of the ends of each of said arms being mounted in rotary manner in the same plane, whilst the in each case other ends movably interengage at least in the disconnection position, the spindle (8) of the control handle simultaneously forming the fulcrum pin of the second switching arm (2), characterized in that the first switching arm (1) can be moved from a disengaged into an engaged position counter to the action of a spring tension by rotating the control handle and therefore also the second switching arm (2) due to its engagement with the latter and in the same can be latch locked in a latch (3) with movable locking means (11 to 14) and is disengaged from the second switching arm (2) and that the second switching arm (2) and a forced release mechanism are coupled to the locking means (11 to 14) in the latch, so that the latch locking of the first switching arm (1) in the latch (3) can be released both through the action of the second switching arm (2) on operating the control handle and by the action of the forced release means on the movable locking means (11 to 14) in the latch (3).
2. Switching mechanism according to claim 1, characterized in that the locking means (11 to 14) in the latch (3) are constituted by a supporting lever (11) and a roller lever (12) and that the first switching arm (1) engages in the connected position in the latch (3), in that it keeps trapped in the locking corner (14) of the supporting lever (11) a pin (13) provided on the roller lever (12).
3. Switching mechanism according to claims 1 or 2, characterized in that as the locking means in the latch (3) is inter alia provided a supporting lever (11), the second switching arm (2) is connected thereto via a first member (18) and the locking of the first switching arm (1) in the connected position is releasable by rotating the supporting lever (11),
4. Switching mechanism according to one of the claims 1 to 3, characterized in that as the locking means in the latch (3) is inter alia provided a supporting lever (11), the forced release means is coupled thereto via a second member (19) and the locking of the first switching arm (1) in the connected position can be released by rotating the supporting lever (11).
5. Switching mechanism acording to claims 3 and 4, characterized in that the first member (18) in the supporting lever (11) is guided in an elongated link (11a), so that the locking of the first switching arm (1) in the connected position is also possible with a fixed control handle or second switching arm (2) solely through a rotation of the supporting lever (11) brought about by the forced release means.
6. Switching mechanism acording to one of the claims 1 to 5, characterized in that the second switching arm (2) is constructed as a resilient hinge (2a, 2b) and that on the switch case (27) is provided a feed wedge (10) onto which, during the movement into the connected position, runs the hinge portion (2a) engaging with the first switching arm (1) outside the connected position and consequently is disengaged from the first switching arm (1),
7. Switching mechanism according to claim 6, characterized in that the hinge portion (2a) of the second switching arm (2) is provided with a recess (5) and the first switching arm (1) is provided with a preferably rotary cam (4) and that the reciprocal engagement of said elements takes place outside the connected position by the engagement of said cam (4) in said recess (5).
8. Switching mechanism according to one of the claims 1 to 7, characterized in that the first switching arm (1) is long and the second switching arm (2) short, the long switching arm (1) being in direct engagement with electrical switching elements (29).
9. Switching mechanism according to claim 8, caracterized in that the electrical switching elements (29) can be connected in by means of a control slide (20) provided with a rotary cam (21) and that the long switching arm (1) has a recess (22) at a corresponding point, so that the cam (21) is constantly embraced by the recess (22).
10. Switching mechanism according to one of the preceding claims, characterized in that the control handle can be disengaged from the fulcrum pin (8) of the second switching arm (2) and has at its end a square recess, whereof one corner is chamfered, and that the fulcrum pin (8) of the second switching arm (2) is square and correspondingly chamfered.
EP88104945A 1987-03-31 1988-03-28 Control mechanism for a load break switch Expired - Lifetime EP0291668B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104945T ATE62768T1 (en) 1987-03-31 1988-03-28 SWITCHING MECHANISM OF A CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1231/87 1987-03-31
CH123187 1987-03-31

Publications (2)

Publication Number Publication Date
EP0291668A1 EP0291668A1 (en) 1988-11-23
EP0291668B1 true EP0291668B1 (en) 1991-04-17

Family

ID=4205552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104945A Expired - Lifetime EP0291668B1 (en) 1987-03-31 1988-03-28 Control mechanism for a load break switch

Country Status (3)

Country Link
EP (1) EP0291668B1 (en)
AT (1) ATE62768T1 (en)
DE (1) DE3862423D1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1765380B2 (en) * 1968-05-09 1972-06-08 Concordia Sprecher, Schaltgerate GmbH, 7000 Stuttgart SWITCH LOCK FOR ELECTRIC SWITCHGEAR
NL158314B (en) * 1975-07-24 1978-10-16 Hazemeijer Bv ELECTRIC SWITCH.
DE8027369U1 (en) * 1980-10-14 1982-07-15 Elek GmbH, 4000 Düsseldorf Snap-action switching device for operating a multi-pole electrical disconnector

Also Published As

Publication number Publication date
DE3862423D1 (en) 1991-05-23
ATE62768T1 (en) 1991-05-15
EP0291668A1 (en) 1988-11-23

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