EP0428475A2 - Low tension switch with pivoted contact member - Google Patents

Low tension switch with pivoted contact member Download PDF

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Publication number
EP0428475A2
EP0428475A2 EP90730016A EP90730016A EP0428475A2 EP 0428475 A2 EP0428475 A2 EP 0428475A2 EP 90730016 A EP90730016 A EP 90730016A EP 90730016 A EP90730016 A EP 90730016A EP 0428475 A2 EP0428475 A2 EP 0428475A2
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EP
European Patent Office
Prior art keywords
contact
contact lever
lever
bearing
stationary
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.)
Granted
Application number
EP90730016A
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German (de)
French (fr)
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EP0428475A3 (en
EP0428475B1 (en
Inventor
Bernhard Dr. Pfeiffer
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of EP0428475A2 publication Critical patent/EP0428475A2/en
Publication of EP0428475A3 publication Critical patent/EP0428475A3/en
Application granted granted Critical
Publication of EP0428475B1 publication Critical patent/EP0428475B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position

Definitions

  • a hook-like end at the rear end of the contact lever hits against a fixed stop on the support of the bearing pin when opening and in this way moves the contact lever relative to the bearing pin using the game mentioned.
  • the contact pieces meet in a different position than they existed in the previous switch-on state. This situation is now brought about with simultaneous occurrence of a sliding movement between the contacting contact pieces in that one of the surfaces of the bearing opening of the contact lever slides on the stationary bearing pin when the bearing-side end of the contact lever is pressed towards the end of the switching-on process.
  • the object of the present invention is to reliably and repeatably effect the relative movement between the switching pieces touching one another when switched on.
  • the invention is based on a low-voltage circuit breaker with the following features: A lever contact arrangement consisting of a pivoted contact lever and a movable contact piece attached to the front end thereof; a fixed mating contact piece with a fixed contact piece attached thereto; a stationary bearing pin for pivotable mounting of the contact lever, which passes through a bearing opening of the contact lever with play; a fixed support of the bearing pin with a working surface which cooperates with the contact lever in the sense of the displacement of the contact lever in its longitudinal direction when pivoting the contact lever for switching on and off.
  • the bearing end of the contact lever is designed as a sliding or rolling surface and the working surface of the carrier is formed obliquely to the longitudinal axis of the contact lever.
  • FIGS. 1, 2 and 3 represent the switch-on process from the fully open position to the first contact of the contact pieces, while Figures 4 and 5 illustrate the subsequent displacement of the contact lever in its longitudinal direction.
  • the lever contact arrangement shown in FIG. 1 and in the following figures has a pivotably mounted contact lever 1 with a switching piece 2 attached to its front end.
  • the pivot bearing of the contact lever 1 is formed by a stationary bearing pin 3 and a recess 4, which extends through it in an approximately triangular manner and allows the contact lever 1 to be displaced in its longitudinal direction relative to the bearing pin 3.
  • the bearing pin 3 is fastened to a carrier 5, which can also be part of a current-transmitting joint arrangement.
  • the clutch lever 10 On its side remote from the bearing pin 3, the clutch lever 10 has a curved path 11 which interacts with a roller 12.
  • a tension spring 13 supported on the bearing pin 3 or an adjacent component prestresses the roller 12 against the cam track 11 by means of a guide pin 14.
  • a recess 15 adapted to the roller 12 in the cam track 11 and an elongated hole 16 provided in the contact lever 1 are matched to one another in such a way that the guide pin 14 rests against the inner end of the elongated hole 16 and thus prestresses the contact lever 1 in the direction of the carrier 5 as long as the contact pieces 2 and 6 do not touch.
  • the clutch lever 10 and the roller 12 can be arranged symmetrically on both sides of the contact lever.

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  • Mechanisms For Operating Contacts (AREA)

Abstract

A low-voltage circuit breaker has a lever contact arrangement having a contact lever (1) which can be displaced in its longitudinal direction. On switching on, a chamfered sliding surface (20), provided on the bearing-side end of the contact lever (1), and an oblique operating surface (21), located on the fixed-position support (5) of the pivotable contact lever (1), cause a displacement of the interacting switching pieces (2, 6), which are in contact, in order to remove extraneous layers, particles and condensation deposited there. <IMAGE>

Description

Die Kontaktanordnungen von Niederspannungs-Leistungsschaltern sind im Betrieb durch Abbrand und mechanische Beanspruchung stark belastet. Während der Abbrand die Oberflächen der zu­sammenwirkenden Schaltstücke verändert und Partikel von abge­schmolzenem Kontaktwerkstoff sowie Rückstände von verbranntem Isoliermaterial auf den Kontaktflächen abgelagert werden, wird dennoch gefordert, daß bei einer erneuten Einschaltung ein möglichst geringer Übergangswiderstand auftritt, damit die Er­wärmung der Kontaktanordnungen unter dem Einfluß des Betriebs­stromes möglichst gering bleibt. Es ist bereits bekannt, abge­sehen von der Auswahl geeigneter Werkstoffe durch eine Relativ­bewegung der einander bereits berührenden Schaltstücke für eine gewisse Selbstreinigung der Oberflächen zu sorgen. Nach der US-A-4 484 164 ist hierzu am lagerseitigen Ende der Kontakt­hebel eine etwa dreieckförmige Lageröffnung vorgesehen, durch die somit der ortsfeste Lagerbolzen mit Spiel hindurchtritt. Ein hakenartiges Ende am hinteren Ende des Kontakthebels trifft beim Öffnen gegen einen ortsfesten Anschlag am Träger des Lagerbolzens und verschiebt auf diese Weise unter Ausnutzung des erwähnten Spiels den Kontakthebel gegenüber dem Lager­bolzen. Beim erneuten Einschalten treffen die Schaltstücke in einer anderen Lage aufeinander, als sie beim vorangehenden Einschaltzustand bestand. Diese Lage wird nun mit gleich­zeitigem Auftreten einer Gleitbewegung zwischen den einander berührenden Schaltstücken dadurch wieder herbeigeführt, daß beim Niederdrücken des lagerseitigen Endes des Kontakthebels gegen Ende des Einschaltvorganges eine der Flächen der Lager­öffnung des Kontakthebels an dem ortsfesten Lagerbolzen gleitet.The contact arrangements of low-voltage circuit breakers are heavily loaded during operation due to erosion and mechanical stress. While the erosion changes the surfaces of the interacting contact pieces and particles of melted contact material and residues of burned insulating material are deposited on the contact surfaces, it is still required that the lowest possible contact resistance occurs when switched on again so that the heating of the contact arrangements under the influence of the operating current remains as low as possible. It is already known, apart from the selection of suitable materials, to ensure a certain self-cleaning of the surfaces by a relative movement of the contact pieces already touching one another. According to US-A-4 484 164, an approximately triangular bearing opening is provided at the end of the contact lever on the bearing side, through which the stationary bearing pin thus passes with play. A hook-like end at the rear end of the contact lever hits against a fixed stop on the support of the bearing pin when opening and in this way moves the contact lever relative to the bearing pin using the game mentioned. When switching on again, the contact pieces meet in a different position than they existed in the previous switch-on state. This situation is now brought about with simultaneous occurrence of a sliding movement between the contacting contact pieces in that one of the surfaces of the bearing opening of the contact lever slides on the stationary bearing pin when the bearing-side end of the contact lever is pressed towards the end of the switching-on process.

Voraussetzung für den geschilderten Vorgang ist der zuverläs­sige zyklische Ablauf der beschriebenen Bewegungen. Da jedoch das Öffnen und Schließen der Kontaktanordnungen mit großer Geschwindigkeit erfolgt, ist die erwünschte Verschiebung des Kontakthebels in seiner Längsrichtung nicht immer gewährleistet. Der Erfindung liegt hiervon ausgehend die Aufgabe zugrunde, die Relativbewegung zwischen den einander beim Einschalten be­rührenden Schaltstücke zuverlässig und wiederholbar zu be­wirken.A prerequisite for the described process is the reliable cyclical execution of the movements described. However, since the contact arrangements are opened and closed at high speed, the desired displacement of the contact lever in its longitudinal direction is not always guaranteed. Proceeding from this, the object of the present invention is to reliably and repeatably effect the relative movement between the switching pieces touching one another when switched on.

Die Erfindung geht hierzu von einem Niedespannungs-Leistungs­schalter mit folgenden Merkmalen aus:
Eine Hebelkonaktanordnung, bestehend aus einem schwenkbar ge­lagerten Kontakthebel und einem an dessen vorderen Ende ange­brachten bewegbaren Schaltstück;
ein ortsfestes Gegenkontaktstück mit einem daran angebrachten ortsfesten Schaltstück;
ein ortsfester Lagerbolzen zur schwenkbaren Lagerung des Kon­takthebels, der eine Lageröffnung des Kontakthebels mit Spiel durchsetzt;
ein ortsfester Träger des Lagerbolzens mit einer Arbeitsfläche, die beim Schwenken des Kontakthebels zum Ein- und Ausschalten mit dem Kontakthebel im Sinne der Verschiebung des Kontakt­hebels in seiner Längsrichtung zusammenwirkt.The invention is based on a low-voltage circuit breaker with the following features:
A lever contact arrangement consisting of a pivoted contact lever and a movable contact piece attached to the front end thereof;
a fixed mating contact piece with a fixed contact piece attached thereto;
a stationary bearing pin for pivotable mounting of the contact lever, which passes through a bearing opening of the contact lever with play;
a fixed support of the bearing pin with a working surface which cooperates with the contact lever in the sense of the displacement of the contact lever in its longitudinal direction when pivoting the contact lever for switching on and off.

Die gestellte Aufgabe wird gemäß der Erfindung durch folgende weitere Merkmale gelöst:
Das lagerseitige Ende des Kontakthebels ist als Gleit- bzw. Wälzfläche ausgebildet und
die Arbeitsfläche des Trägers ist schräg zur Längsachse des Kontakthebels verlaufend ausgebildet.
Durch diese Merkmale wird die Längsverschiebung des Kontakt­hebels nicht mehr durch ein Gleiten zwischen dem Lagerbolzen und einer der Begrenzungsflächen der Lageröffnung in dem Kon­takthebel bewirkt, sondern durch eine Relativbewegung zwischen einer äußeren Endfläche des Kontakthebels und dem ortsfesten Träger. An dieser Stelle lassen sich die zusammenwirkenden Flächen dem Zweck entsprechend günstiger dimensionieren, wo­durch der beabsichtigte Vorgang zuverlässiger zustandekommt.The object is achieved according to the invention by the following further features:
The bearing end of the contact lever is designed as a sliding or rolling surface and
the working surface of the carrier is formed obliquely to the longitudinal axis of the contact lever.
With these features, the longitudinal displacement of the contact lever is no longer brought about by sliding between the bearing pin and one of the boundary surfaces of the bearing opening in the contact lever, but rather by a relative movement between an outer end surface of the contact lever and the stationary one Carrier. At this point, the interacting surfaces can be dimensioned more appropriately for the purpose, which makes the intended process more reliable.

Als vorteilhaft erweist es sich, daß zwischen einem ortsfesten Widerlager und dem vorderen Bereich des Kontakthebels eine den Kontakthebel gegen die schräge Arbeitsfläche vorspannende Feder angeordnet ist. Diese Feder hält die an dem Kontakthebel und dem Träger vorgesehenen zusammenwirkenden Flächen ständig in Berührung miteinander, so daß der Kontakthebel beim Öffnen in Richtung seines Schwenklagers verschoben und beim Einschalten unter Berührung der Schaltstücke in entgegengesetzter Richtung verschoben wird.It proves to be advantageous that between a stationary abutment and the front area of the contact lever a spring biasing the contact lever against the oblique working surface is arranged. This spring keeps the cooperating surfaces provided on the contact lever and the carrier constantly in contact with one another, so that the contact lever is moved in the direction of its pivot bearing when opened and is moved in the opposite direction when it is switched on while touching the contact pieces.

Die Erfindung wird im folgenden anhand des in den Figuren dar­gestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.

Die Figuren zeigen eine Hebelkontaktanordnung eines Nieder­spannungs-Leistungsschalters in einer Seitenansicht in ver­schiedenen Stellungen zwischen der vollständig geöffneten und der vollständig geschlossenen Stellung. Hierbei stellen die Figuren 1, 2 und 3 den Einschaltvorgang von der vollständig geöffneten Stellung bis zur ersten Berührung der Schaltstücke dar, während die Figuren 4 und 5 die anschließende Verschiebung des Kontakthebels in seiner Längsrichtung veranschaulichen.The figures show a lever contact arrangement of a low-voltage circuit breaker in a side view in different positions between the fully open and the fully closed position. Figures 1, 2 and 3 represent the switch-on process from the fully open position to the first contact of the contact pieces, while Figures 4 and 5 illustrate the subsequent displacement of the contact lever in its longitudinal direction.

Die in der Figur 1 und in den folgenden Figuren gezeigte Hebelkontaktanordnung weist einen schwenkbar gelagerten Kon­takthebel 1 mit einem an dessen vorderem Ende angebrachten Schaltstück 2 auf. Das Schwenklager des Kontakthebels 1 wird durch einen ortsfesten Lagerbolzen 3 und eine von diesem durch­setzte, etwa dreieckförmig erweiterte Ausnehmung 4 gebildet, die eine Verschiebung des Kontakthebels 1 in seiner Längsrichtung relativ zu dem Lagerbolzen 3 gestattet. Der Lagerbolzen 3 ist an einem Träger 5 befestigt, der zugleich Bestandteil einer stromübertragenden Gelenkanordnung sein kann.The lever contact arrangement shown in FIG. 1 and in the following figures has a pivotably mounted contact lever 1 with a switching piece 2 attached to its front end. The pivot bearing of the contact lever 1 is formed by a stationary bearing pin 3 and a recess 4, which extends through it in an approximately triangular manner and allows the contact lever 1 to be displaced in its longitudinal direction relative to the bearing pin 3. The bearing pin 3 is fastened to a carrier 5, which can also be part of a current-transmitting joint arrangement.

Mit dem bewegbaren Schaltstück 2 wirkt ein ortsfestes Schalt­stück 6 zusammen, das an einem ortsfesten Gegenkontaktstück 7 befestigt ist. Zur Bewegung des Kontakthebels 1 in seine Ein­schaltstellung bzw. in seine Ausschaltstellung dient ein Kupplungshebel 10, der gleichfalls um den Lagerbolzen 3 schwenkbar gelagert ist. An seiner dem Lagerbolzen 3 fernen Seite besitzt der Kupplungshebel 10 eine Kurvenbahn 11, die mit einer Rolle 12 zusammenwirkt. Eine an dem Lagerbolzen 3 oder einem benachbarten Bauteil abgestützte Zugfeder 13 spannt die Rolle 12 mittels eines Führungsstiftes 14 gegen die Kurvenbahn 11 vor. Eine der Rolle 12 angepaßte Vertiefung 15 in der Kurvenbahn 11 und ein in dem Kontakthebel 1 vorgesehenes Langloch 16 sind so aufeinander abgestimmt, daß der Führungs­stift 14 am inneren Ende des Langloches 16 anliegt und somit den Kontakthebel 1 in Richtung auf den Träger 5 vorspannt, so­lange sich die Schaltstücke 2 und 6 nicht berühren. Dies ist in den Figuren 1 und 2 der Fall. Der Kupplungshebel 10 und die Rolle 12 können symmetrisch beidseitig des Kontakthebels ange­ordnet sein.A stationary contact piece 6, which is attached to a stationary counter contact piece 7, interacts with the movable contact piece 2. A coupling lever 10, which is likewise pivotably mounted about the bearing pin 3, serves to move the contact lever 1 into its switched-on position or into its switched-off position. On its side remote from the bearing pin 3, the clutch lever 10 has a curved path 11 which interacts with a roller 12. A tension spring 13 supported on the bearing pin 3 or an adjacent component prestresses the roller 12 against the cam track 11 by means of a guide pin 14. A recess 15 adapted to the roller 12 in the cam track 11 and an elongated hole 16 provided in the contact lever 1 are matched to one another in such a way that the guide pin 14 rests against the inner end of the elongated hole 16 and thus prestresses the contact lever 1 in the direction of the carrier 5 as long as the contact pieces 2 and 6 do not touch. This is the case in Figures 1 and 2. The clutch lever 10 and the roller 12 can be arranged symmetrically on both sides of the contact lever.

Die Figur 1 zeigt die vollständig geöffnete Stellung des Kon­takthebels 1. Aufgrund des Spieles des Lagerbolzens 3 gegenüber der Lageröffnung 4 liegt dabei der Kontakthebel mit der unteren Begrenzung der Lageröffnung 4 an dem Lagerbolzen 3 an. Die Zugfeder 13 spannt den Kontakthebel 1 dabei mit seiner hinteren Gleitfläche 20 gegen eine schräge Arbeitsfläche 21 des Trägers vor. Diese relative Stellung der Teile bleibt auch beim Be­ginn der Einschaltbewegung gemäß der Figur 2 und bis zur ersten Berührung der Schaltstücke 2 und 6 gemäß der Figur 3 erhalten.1 shows the fully open position of the contact lever 1. Because of the play of the bearing pin 3 with respect to the bearing opening 4, the contact lever with the lower limit of the bearing opening 4 bears against the bearing pin 3. The tension spring 13 biases the contact lever 1 with its rear sliding surface 20 against an inclined working surface 21 of the carrier. This relative position of the parts is retained even at the start of the switch-on movement according to FIG. 2 and until the switching pieces 2 and 6 according to FIG. 3 are touched for the first time.

Erst der weitere Einschaltvorgang gemäß den Figuren 4 und 5, bei dem der Kupplungshebel 10 entgegen dem Uhrzeigersinn mit einer zunehmenden Kraft beaufschlagt wird, tritt eine Änderung in der relativen Stellung der Teile auf. Zunächst wird die Rolle 12 aus der Vertiefung 15 der Kurvenbahn 11 entgegen der Vor­spannung der Zugfeder 13 herausgedrückt, um eine Andruckkraft zwischen den Schaltstücken 2 und 6 zu erzeugen (Figur 5). Mit zunehmender Kraftwirkung wird dann der Kontakthebel 1 an seinem lagerseitigen Ende in Richtung auf das Gegenkontaktstück 7 der­art gedrückt, daß die Gleitfläche 20 an der schrägen Arbeits­fläche 21 abwärts gleitet, bis die Unterseite des Kontakthebels auf dem Träger 5 aufliegt. Der schräge Verlauf der Arbeits­fläche 21 relativ zu der Längsrichtung des Kontakthebels 1 be­wirkt dabei eine Verschiebung des Kontakthebels 1 in seiner Längsrichtung und damit eine relative Verschiebung der Schalt­stücke 2 und 6 gegeneinander (Figur 6). Hierdurch werden Fremd­schichten, lose Partikel, Niederschläge und ähnliche Rückstände beseitigt.Only the further switch-on process according to FIGS. 4 and 5, in which an increasing force is applied to the clutch lever 10 counterclockwise, does a change in the relative position of the parts occur. First, the roller 12 is pressed out of the recess 15 of the cam track 11 against the bias of the tension spring 13 by a pressing force generate between the contact pieces 2 and 6 (Figure 5). With increasing force, the contact lever 1 is then pressed at its bearing end in the direction of the mating contact piece 7 in such a way that the sliding surface 20 slides downward on the inclined working surface 21 until the underside of the contact lever rests on the carrier 5. The oblique course of the working surface 21 relative to the longitudinal direction of the contact lever 1 causes a displacement of the contact lever 1 in its longitudinal direction and thus a relative displacement of the switching pieces 2 and 6 relative to one another (FIG. 6). This removes foreign layers, loose particles, precipitation and similar residues.

Beim erneuten Öffnen des Kontakthebels 1 und der entsprechenden Schwenkung des Kupplungshebels 10 im Uhrzeigersinn gelangt zu­nächst die Rolle 12 in die Vertiefung 15 der Kurvenbahn 11. Es entsteht nun wieder die Vorspannung des Kontakthebels 1 in Richtung auf die Arbeitsfläche 21, bis die Ausgangsstellung gemäß der Figur 1 erreicht ist.When the contact lever 1 is opened again and the corresponding pivoting of the coupling lever 10 in the clockwise direction, the roller 12 first reaches the recess 15 in the cam track 11. The contact lever 1 is now pretensioned in the direction of the work surface 21 until the starting position according to the figure 1 is reached.

Claims (2)

1. Niederspannungs-Leistungsschalter mit folgenden Merkmalen: eine Hebelkontaktanordnung, bestehend aus einem schwenkbar ge­lagerten Kontakthebel (1) und einem an dessen vorderen Ende angebrachten bewegbaren Schaltstück (2);
einem ortsfesten Gegenkontaktstück (7) mit einem daran ange­brachten ortsfesten Schaltstück (6);
ein ortsfester Lagerbolzen (3) zur schwenkbaren Lagerung des Kontakthebels (1), der eine Lageröffnung (4) des Kontakt­hebels (1) mit Spiel durchsetzt;
ein ortsfester Träger (5) des Lagerbolzens (3) mit einer Arbeitsfläche (21), die beim Schwenken des Kontakthebels (1) zum Ein- und Ausschalten mit dem Kontakthebel (1) im Sinne der Verschiebung des Kontakthebels (1) in seiner Längsrichtung zusammenwirkt, gekennzeichnet durch folgende weitere Merkmale:
das lagerseitige Ende des Kontakthebels (1) ist als Gleit- bzw. Wälzfläche (20) ausgebildet;
die Arbeitsfläche (21) des Trägers (5) ist schräg zu Längsachse des Kontakthebels (1) verlaufend ausgebildet.1. Low-voltage circuit breaker with the following features: a lever contact arrangement, consisting of a pivotably mounted contact lever (1) and a movable contact piece (2) attached to the front end thereof;
a stationary mating contact piece (7) with a fixed switching piece (6) attached to it;
a stationary bearing pin (3) for pivotably mounting the contact lever (1), which passes through a bearing opening (4) of the contact lever (1) with play;
a stationary support (5) of the bearing pin (3) with a working surface (21) which cooperates with the contact lever (1) in the sense of the displacement of the contact lever (1) in its longitudinal direction when the contact lever (1) is pivoted for switching on and off , characterized by the following additional features:
the bearing-side end of the contact lever (1) is designed as a sliding or rolling surface (20);
the working surface (21) of the carrier (5) is designed to run obliquely to the longitudinal axis of the contact lever (1). 2. Niederspannungs-Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß zwischen einem ortsfesten Widerlager (3) und dem vorderen Bereich des Kontakthebels (1) eine dem Kontakthebel (1) gegen die schräge Arbeitsfläche (21) vorspannende Feder (13) angeordnet ist.2. Low-voltage circuit breaker according to claim 1, characterized in that between a stationary abutment (3) and the front region of the contact lever (1) is arranged a spring (13) biasing the contact lever (1) against the inclined working surface (21).
EP90730016A 1989-11-13 1990-11-05 Low tension switch with pivoted contact member Expired - Lifetime EP0428475B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8913522U DE8913522U1 (en) 1989-11-13 1989-11-13 Low-voltage circuit breaker with a lever contact arrangement
DE8913522U 1989-11-13

Publications (3)

Publication Number Publication Date
EP0428475A2 true EP0428475A2 (en) 1991-05-22
EP0428475A3 EP0428475A3 (en) 1992-01-08
EP0428475B1 EP0428475B1 (en) 1995-02-15

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ID=6844622

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EP90730016A Expired - Lifetime EP0428475B1 (en) 1989-11-13 1990-11-05 Low tension switch with pivoted contact member

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EP (1) EP0428475B1 (en)
DE (2) DE8913522U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371662A (en) * 1993-08-06 1994-12-06 Shen-Ko; Tseng Movement-controlled light emitting device
EP0632478A1 (en) * 1993-06-07 1995-01-04 Eaton Corporation Electrical circuit interrupting device with means to break welded contacts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218593B (en) * 1963-11-27 1966-06-08 Walter Holzer Flat contact piece
GB2137418A (en) * 1983-03-28 1984-10-03 Siemens Allis Inc Braidless movable contact with wiping action
GB2147146A (en) * 1983-09-26 1985-05-01 Fuji Electric Co Ltd Contact mechanism for a circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218593B (en) * 1963-11-27 1966-06-08 Walter Holzer Flat contact piece
GB2137418A (en) * 1983-03-28 1984-10-03 Siemens Allis Inc Braidless movable contact with wiping action
GB2147146A (en) * 1983-09-26 1985-05-01 Fuji Electric Co Ltd Contact mechanism for a circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632478A1 (en) * 1993-06-07 1995-01-04 Eaton Corporation Electrical circuit interrupting device with means to break welded contacts
US5371662A (en) * 1993-08-06 1994-12-06 Shen-Ko; Tseng Movement-controlled light emitting device

Also Published As

Publication number Publication date
DE8913522U1 (en) 1991-03-14
DE59008472D1 (en) 1995-03-23
EP0428475A3 (en) 1992-01-08
EP0428475B1 (en) 1995-02-15

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