EP0427826B1 - Automatic cutout - Google Patents

Automatic cutout Download PDF

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Publication number
EP0427826B1
EP0427826B1 EP90906852A EP90906852A EP0427826B1 EP 0427826 B1 EP0427826 B1 EP 0427826B1 EP 90906852 A EP90906852 A EP 90906852A EP 90906852 A EP90906852 A EP 90906852A EP 0427826 B1 EP0427826 B1 EP 0427826B1
Authority
EP
European Patent Office
Prior art keywords
movable contact
arc
contact
circuit breaker
bearing
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
Application number
EP90906852A
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German (de)
French (fr)
Other versions
EP0427826A1 (en
Inventor
Peter Flohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heinrich Kopp GmbH and Co KG
Original Assignee
Heinrich Kopp GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heinrich Kopp GmbH and Co KG filed Critical Heinrich Kopp GmbH and Co KG
Publication of EP0427826A1 publication Critical patent/EP0427826A1/en
Application granted granted Critical
Publication of EP0427826B1 publication Critical patent/EP0427826B1/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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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
    • H01H71/08—Terminals; Connections
    • 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
    • H01H77/101—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 with increasing of contact pressure by electrodynamic forces before opening
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a circuit breaker according to the preamble of claim 1.
  • a circuit breaker has the task of shortening the current interruption in the event of a trip caused by a short circuit or line overload and in the event of a short circuit limiting the current to a minimum that the line to be protected cannot be damaged in the event of an error.
  • Such miniature circuit breakers are now produced in large quantities, partly fully automatically, so that the number of individual parts required for the function of the miniature circuit breaker, but also their ease of installation, are decisive for the economic success of this series product.
  • the adjustment effort for the calibration of the overcurrent release, but also the connections of the individual components through which the current flows, designed as a welding or soldering point delay the production process.
  • the object of the invention is therefore to provide a strongly current-limiting circuit breaker of the type mentioned in the introduction, in which any stranded connection can be dispensed with, which manages with only two welded or soldered connections and which does not require any adjustment effort.
  • the illustration shows schematically a circuit breaker with arc extinguishing device, switching mechanism and overcurrent release.
  • the arc chamber 1 there are, parallel to the chamber bottom wall, quenching plates 2, a contact arrangement 3, 4 and arc guide rails 5, 6.
  • the arc guide rail 6, on which the stationary contact piece 3 is attached, stands on the one hand with the coil of the overcurrent release 7 via the welding point 8 in connection, which in turn is connected at its other end via the welding point 9 to a connecting terminal 10.
  • the arc guide rail 5 flanks the lower quenching plate of the stack and forms a bearing 11 for the movable contact 4 with a rear extension 5a.
  • the arc guide rail 5 is arranged vertically in front of the quenching plates with an extension 5b which carries the connecting terminal 12.
  • the contact spring 13 is supported at one end in the housing 14 and presses the movable contact 4 against the fixed contact 3 in the switched-on state.
  • FIG. 1 shows this state and the force acting on the bearing point in the direction of the arrow and caused by the current flow.
  • the switching mechanism 15 is only shown for better understanding, it is of no importance for the short-circuit shutdown.
  • the current runs with closed contacts along the arrows shown from the terminal 12 via the arc guide rail 5 and the bearing 11, the movable contact 4 to the fixed contact 3 and from there via the coil of the overcurrent release 7 to the terminal 10.
  • the movable contact 4 flung away from the fixed contact 3 and the current interrupted.
  • the movable contact 4 goes into the position shown in FIG. 2, the arc drawn between the movable contact and the fixed contact jumping over from the movable contact to the arc guide rail 5 after reaching the open position. Due to the blowing effect of the power supply lines, the arc is driven into the quenching plate stack and extinguished there.

Abstract

PCT No. PCT/DE90/00316 Sec. 371 Date Mar. 8, 1991 Sec. 102(e) Date Mar. 8, 1991 PCT Filed May 2, 1990 PCT Pub. No. WO90/13903 PCT Pub. Date Nov. 15, 1990.An automatic cutout or a power circuit breaker with high current-limiting capacity contains no conductor connections of any kind, has only two weld or solder joints and requires no adjustment. This automatic cutout can be assembled progressively and purely mechanically from a minimum number of piece parts, without inconvenient connecting wires and without additional adjustment. Welding is prevented because the spark is discharge swiftly at the contacts and pressure of the movable contact in its bearing is guaranteed. As flexible connecting wires are dispensed with, fewer movable parts are necessary, and hence contact opening is more rapid. The excess-current trigger or the overcurrent trip is already calibrated and therefore the protective switch requires no adjustment. The excess-current trigger remains calibrated even after numerous disconnections.

Description

Die Erfindung bezieht sich auf einen Leitungsschutzschalter gemäß dem Oberbegriff des Anspruches 1. Ein derartiger Leitungsschutzschalter hat die Aufgabe, bei einer durch Kurzschluß oder durch Leitungsüberlastung verursachten Auslösung die Stromunterbrechung so abzukürzen und im Kurzschlußfall den Strom auf ein Minimum zu begrenzen, daß die zu schützende Leitung im Fehlerfall keinen Schaden nehmen kann. Derartige Leitungsschutzschalter werden heute in sehr großen Stückzahlen zum Teil vollautomatisch hergestellt, so daß die Zahl der erforderlichen Einzelteile, die für die Funktion des Leitungsschutzschalters notwendig sind, aber auch deren Montagefreundlichkeit für den wirtschaftlichen Erfolg dieses Serienfabrikates ausschlaggebend sind. Insbesondere der Justieraufwand für die Eichung des Überstromauslösers, aber auch die als Schweiß- oder Lötstelle ausgeführten Verbindungen der einzelnen, vom Strom durchflossenen Bauteile, verzögern den Fertigungsablauf.The invention relates to a circuit breaker according to the preamble of claim 1. Such a circuit breaker has the task of shortening the current interruption in the event of a trip caused by a short circuit or line overload and in the event of a short circuit limiting the current to a minimum that the line to be protected cannot be damaged in the event of an error. Such miniature circuit breakers are now produced in large quantities, partly fully automatically, so that the number of individual parts required for the function of the miniature circuit breaker, but also their ease of installation, are decisive for the economic success of this series product. In particular, the adjustment effort for the calibration of the overcurrent release, but also the connections of the individual components through which the current flows, designed as a welding or soldering point, delay the production process.

Im Laufe der Zeit hat sich bei der Entwicklung von Leitungsschutzschaltern das Konstruktionsprinzip der Einfachunterbrechung durchgesetzt. Bei diesen Anordnungen werden die beweglichen Teile, wie Kontakte, Bimetalle usw., mit flexiblen Kupferlitzen verbunden, um den Stromfluß zu ermöglichen, vergleiche DE-OS 33 42 469. Die fortschrittlichsten Konstruktionen kommen dabei mit einer Litze aus, die den beweglichen Kontakt mit dem freien Ende des Bimetalls verbindet, so z. B. PS 25 04 954, PS 28 41 004 und DE 36 19 239. Wird nun, wie in DE 38 03 849 (veröffentlicht am 10.08.89) vorgeschlagen, der Betriebsstrom über die Lagerstelle des beweglichen Kontaktes geführt, dann kann es vorkommen, daß bei dieser litzenfreien Konstruktion wegen der auf den beweglichen Kontakt wirkenden Stromkräfte in der Lagerstelle schwankende Anpreßkräfte herrschen, die ein Verschweißen der beiden Teile begünstigen. Dies ist unerwünscht.Over time, the design principle of simple interruption has become established in the development of circuit breakers. In these arrangements, the moving parts, such as contacts, bimetallic metals, etc., are connected to flexible copper strands to allow the current to flow, see DE-OS 33 42 469. The most advanced constructions come with a strand that makes the moving contact with the free end of the bimetal connects, so z. B. PS 25 04 954, PS 28 41 004 and DE 36 19 239. If, as proposed in DE 38 03 849 (published on August 10, 1989), the operating current is conducted through the bearing of the movable contact, it can happen that this strand-free construction is due to the movable contact acting current forces in the bearing point fluctuating contact forces that favor welding of the two parts. This is undesirable.

Die Aufgabe der Erfindung ist es daher, einen stark strombegrenzenden Leitungsschutzschalter der eingangs genannten Art zu schaffen, bei dem auf jegliche Litzenverbindung verzichtet werden kann, der mit lediglich zwei Schweiß- oder Lötverbindungen auskommt und der keinen Justieraufwand erfordert.The object of the invention is therefore to provide a strongly current-limiting circuit breaker of the type mentioned in the introduction, in which any stranded connection can be dispensed with, which manages with only two welded or soldered connections and which does not require any adjustment effort.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1. Zweckmäßige Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved according to the invention by the features of claim 1. Useful further developments of the invention result from the subclaims.

Mit einer derartigen Anordnung wird auf fortschrittliche Weise erreicht, daß mit einem Minimum an Einzelteilen ohne störende Verbindungslitzen und ohne zusätzlichen Justieraufwand ein stark strombegrenzender Leitungsschutzschalter vollmechanisch montiert werden kann. Dabei wird die Stromführung im Kontaktbereich dazu benützt, zusätzlich zur Anpreßkraft der Kontaktfeder den beweglichen Kontakt in seine Lagerstelle auf der Laufschiene zu pressen, um somit auch bei großen Betriebs- oder Überströmen eine sichere Kontaktgabe zu erreichen. Ein Verschweißen des beweglichen Kontaktes in seiner stromdurchflossenen Lagerstelle wird sicher vermieden. Die Stromführung im Kontaktbereich wird aber auch durch ihren U-förmigen Verlauf dazu benützt, den bei der Abschaltung entstehenden Lichtbogen durch Blaswirkung schnell von der Kontaktzone weg in die Löschkammer zu treiben. Andererseits wird die Stromführung im Lichtbogenleitblech und im beweglichen Kontakt aufgrund der gegensinnigen Stromrichtung dazu benützt, unabhängig vom Magnetauslöser im Kurzschlußfall den beweglichen Kontakt vom Lichtbogenleitblech und vom Festkontakt weg aufzuschleudern. Dabei wird der Schenkelabstand der U-förmigen Blasschleife während der Abschaltung beibehalten, so daß der Lichtbogenantrieb, im Gegensatz zu bekannten Ausführungen, nicht nachläßt. Gleichzeitig wird durch die Drehung des beweglichen Kontaktes das Gegenmoment der Kontaktfeder geringer. Diese Maßnahmen bewirken zusammen ein sehr schnelles Ablaufen des Lichtbogens von der Kontaktstelle bei gleichzeitig sichergestelltem Anpreßdruck des beweglichen Kontaktes in seiner Lagerstelle, so daß ein Verschweißen vermieden wird. Durch den Wegfall der flexiblen Verbindungslitze wird zudem die Masse der bewegten Teile kleiner, was eine schnellere Kontaktöffnung zur Folge hat. Es hat sich gezeigt, daß ein zwischen dem beweglichen und dem Festkontakt angebrachter Isoliersteg den Lichtbogenlauf günstig beeinflußt, insbesondere wenn er aus einem gasabgebenden Kunststoff besteht. Zweckmäßigerweise wird als Überstromauslöser eine Anordnung gewählt, wie sie in DE 36 37 275 beschrieben ist. Der Vorteil liegt darin, daß der Überstromauslöser bereits geeicht ist und somit eine Justierung im Leitungsschutzschalter selbst entfallen kann.With such an arrangement it is achieved in an advanced manner that a strongly current-limiting circuit breaker can be fully mechanically installed with a minimum of individual parts without annoying connecting strands and without additional adjustment effort. The current supply in the contact area is used to press the movable contact into its bearing on the running rail in addition to the contact spring's pressure, in order to achieve reliable contact even with large operating or overcurrents. A welding of the movable contact in its current-carrying Bearing point is surely avoided. The current flow in the contact area is also used due to its U-shaped course to quickly blow the arc that arises during the shutdown by blowing action away from the contact zone into the quenching chamber. On the other hand, the current supply in the arc guide plate and in the movable contact is used due to the opposite direction of the current to spin the movable contact away from the arc guide plate and away from the fixed contact, regardless of the magnetic release in the event of a short circuit. The leg distance of the U-shaped blow loop is maintained during the shutdown, so that the arc drive, in contrast to known designs, does not decrease. At the same time, the counter-moment of the contact spring is reduced by the rotation of the movable contact. These measures together cause the arc to run away very quickly from the contact point while at the same time ensuring the contact pressure of the movable contact in its bearing point, so that welding is avoided. By eliminating the flexible connecting wire, the mass of the moving parts becomes smaller, which results in faster contact opening. It has been shown that an insulating web attached between the movable and the fixed contact has a favorable influence on the arc running, in particular if it consists of a gas-emitting plastic. An arrangement such as that described in DE 36 37 275 is expediently chosen as the overcurrent release. The advantage is that the overcurrent release is already calibrated and therefore an adjustment in the circuit breaker itself can be omitted.

Anhand der Zeichnung sei die Erfindung an einem Ausführungsbeispiel näher erläutert.The invention is explained in more detail using an exemplary embodiment with reference to the drawing.

Die Darstellung zeigt schematisch einen Leitungsschutzschalter mit Lichtbogenlöscheinrichtung, Schaltmechanismus und Überstromauslöser. In der Lichtbogenkammer 1 befinden sich, parallel zur Kammerbodenwand, Löschbleche 2, eine Kontaktanordnung 3, 4 und Lichtbogenleitschienen 5, 6. Die Lichtbogenleitschiene 6, auf der das ortsfeste Kontaktstück 3 angebracht ist, steht einerseits mit der Spule des Überstromauslösers 7 über die Schweißstelle 8 in Verbindung, die ihrerseits mit ihrem anderen Ende über die Schweißstelle 9 an eine Anschlußklemme 10 angeschlossen ist. Die Lichtbogenleitschiene 5 flankiert das untere Löschblech des Stapels und bildet mit einer rückwärtigen Verlängerung 5a die Lagerstelle 11 für den beweglichen Kontakt 4. Die Lichtbogenleitschiene 5 ist senkrecht vor den Löschblechen angeordnet mit einer Verlängerung 5b, welche die Anschlußklemme 12 trägt. Die Kontaktfeder 13 stützt sich mit ihrem einen Ende im Gehäuse 14 ab und drückt den beweglichen Kontakt 4 im eingeschalteten Zustand an den Festkontakt 3. Die Figur 1 zeigt diesen Zustand sowie die in Pfeilrichtung auf die Lagerstelle wirkende, durch den Stromfluß hervorgerufene Kraft. Der Schaltmechanismus 15 ist lediglich zum besseren Verständnis dargestellt, er ist für die Kurzschlußabschaltung ohne Bedeutung.The illustration shows schematically a circuit breaker with arc extinguishing device, switching mechanism and overcurrent release. In the arc chamber 1 there are, parallel to the chamber bottom wall, quenching plates 2, a contact arrangement 3, 4 and arc guide rails 5, 6. The arc guide rail 6, on which the stationary contact piece 3 is attached, stands on the one hand with the coil of the overcurrent release 7 via the welding point 8 in connection, which in turn is connected at its other end via the welding point 9 to a connecting terminal 10. The arc guide rail 5 flanks the lower quenching plate of the stack and forms a bearing 11 for the movable contact 4 with a rear extension 5a. The arc guide rail 5 is arranged vertically in front of the quenching plates with an extension 5b which carries the connecting terminal 12. The contact spring 13 is supported at one end in the housing 14 and presses the movable contact 4 against the fixed contact 3 in the switched-on state. FIG. 1 shows this state and the force acting on the bearing point in the direction of the arrow and caused by the current flow. The switching mechanism 15 is only shown for better understanding, it is of no importance for the short-circuit shutdown.

Die Figur 2 zeigt den ausgeschalteten Zustand mit dem Isoliersteg 16 zwischen beweglichem und Festkontakt. In dieser Position ist der Löschvorgang bereits beendet. Der bewegliche Kontakt 4 wird durch den Schaltmechanismus 15 in der geöffneten Schaltstellung gehalten.FIG. 2 shows the switched-off state with the insulating web 16 between the movable and fixed contacts. In this Position has already been deleted. The movable contact 4 is held in the open switching position by the switching mechanism 15.

Der Strom verläuft bei geschlossenen Kontakten entlang der eingezeichneten Pfeile von der Anschlußklemme 12 über die Lichtbogenleitschiene 5 und die Lagerstelle 11, dem beweglichen Kontakt 4 zu dem Festkontakt 3 und von dort über die Spule des Überstromauslösers 7 zu der Anschlußklemme 10. Beim Auftreten eines Kurzschlusses wird der bewegliche Kontakt 4 vom Festkontakt 3 weggeschleudert und der Strom unterbrochen. Der bewegliche Kontakt 4 geht in die in Figur 2 dargestellte Position, wobei der zwischen dem beweglichen Kontakt und dem Festkontakt gezogene Lichtbogen nach Erreichen der Öffnungsstellung von dem beweglichen Kontakt zu der Lichtbogenleitschiene 5 überspringt. Durch die Blaswirkung der Stromzuführungsleitungen wird der Lichtbogen in den Löschblechstapel hineingetrieben und dort zum Erlöschen gebracht.The current runs with closed contacts along the arrows shown from the terminal 12 via the arc guide rail 5 and the bearing 11, the movable contact 4 to the fixed contact 3 and from there via the coil of the overcurrent release 7 to the terminal 10. When a short circuit occurs the movable contact 4 flung away from the fixed contact 3 and the current interrupted. The movable contact 4 goes into the position shown in FIG. 2, the arc drawn between the movable contact and the fixed contact jumping over from the movable contact to the arc guide rail 5 after reaching the open position. Due to the blowing effect of the power supply lines, the arc is driven into the quenching plate stack and extinguished there.

Claims (7)

  1. A circuit breaker with single interruption comprising an overcurrent trip (7);
    a switching mechanism (15) which is manually operatable by means of said overcurrent trip (7);
    an arc-extinguishing means with an arc-extinguishing plate stack (2) which is confined by arc-guidestrips (5,6);
    and a contact arrangement being provided on the front side in front of the arc-extinguishing plate stack (2) in an arc-chamber (1) with a fixed contact (3) and a movable contact (4),
    said fixed contact (3) being galvanically connected to a connection terminal (10) via said overcurrent trip (7),
    said movable contact (4) being galvanically connected to a connection terminal (12) via an arc-guidestrip (5, 5a, 5, 5b), and a bearing (11) is formed for said movable contact (4) at the arc-guidestrip (5a),
    characterized in that
    said movable contact (4) comprises at its free end up to a contacting location an angled conductor portion which runs nearly parallel to a conductor portion leading from the overcurrent trip (7) to the fixed contact (3), and
    that, for increasing the pressure at said bearing (11) of the movable contact (4) and for effecting a torque onto the movable contact (4) in an opening direction by means of current forces occurring in the parallel conductor portions, the angled conductor portion of the movable contact (4) forms a tangent to a circle, the center of which is disposed within the range of said bearing (11).
  2. The circuit breaker according to claim 1,
    characterized in that
    the conductor portion leading from the overcurrent trip (7) to said fixed contact (3) forms an obtuse angle with the contact surface within the range of the current supply to the contacting location resulting together with the free end of the movable contact (4) in a U-shaped course for the current flow, and wherein the axis of said U-shaped course runs nearly parallel to an attachment face of the circuit breaker or to the plates (2) of the arc-extinguishing plate stack (2).
  3. The circuit breaker according to claim 1 or 2,
    characterized in that
    said arc-guidestrip (5) a portion of which is formed as a bearing (11) for said movable contact (4) comprises another portion running narrowly and parallel to said movable contact (4) for the generation of a torque acting on said movable contact (4) by means of repulsing current forces.
  4. The circuit breaker according to claim 3,
    characterized in that
    the parallel portions of said arc-guidestrip (5) and said movable contact (4) are disposed almost perpendicular to said arc-extinguishing plates and to said attachment face of said circuit breaker and run in the direction of said bearing portion (11).
  5. The circuit breaker according to claims 1 to 4,
    characterized in that
    said movable contact (4) is pivotably supported in said bearing (11) on the side of the arc-guidestrips (5) which is turned away from said arc-extinguishing plate stack (2) to avoid a contact of said bearing (11) by the arc-base.
  6. The circuit breaker according to any one of the preceeding claims,
    characterized in that
    in the switched-on position said movable contact (4) is pressed on said fixed contact (3) by means of a contacting spring (13) being supported by a casing (14), wherein the effective force direction of said contacting spring (13) passes close to the bearing (11) and said contacting spring (13) additionally presses said movable contact (4) into the bearing (11), said movable contact (4) not having any mechanical connection to the switching mechanism (15).
  7. The circuit breaker according to any one of the preceeding claims,
    characterized in that
    said contacts (3, 4) of the contact arrangement are galvanically connected to corresponding connection terminals (10, 12) without wires.
EP90906852A 1989-05-09 1990-05-02 Automatic cutout Expired - Lifetime EP0427826B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3915127 1989-05-09
DE3915127A DE3915127C1 (en) 1989-05-09 1989-05-09
PCT/DE1990/000316 WO1990013903A1 (en) 1989-05-09 1990-05-02 Automatic cutout

Publications (2)

Publication Number Publication Date
EP0427826A1 EP0427826A1 (en) 1991-05-22
EP0427826B1 true EP0427826B1 (en) 1995-04-19

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Application Number Title Priority Date Filing Date
EP90906852A Expired - Lifetime EP0427826B1 (en) 1989-05-09 1990-05-02 Automatic cutout

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Country Link
US (1) US5151674A (en)
EP (1) EP0427826B1 (en)
AT (1) ATE121562T1 (en)
DE (1) DE3915127C1 (en)
DK (1) DK0427826T3 (en)
ES (1) ES2071819T3 (en)
HK (1) HK12196A (en)
WO (1) WO1990013903A1 (en)

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DE4313207A1 (en) * 1993-04-22 1994-10-27 Kopp Heinrich Ag Miniature circuit breaker
DE4406670C3 (en) * 1994-03-01 1999-09-09 Kopp Heinrich Ag Miniature circuit breaker
DE4424125C1 (en) * 1994-07-08 1995-07-13 Flohr Peter Automatic main protection fuse for distribution network
DE4424332B4 (en) * 1994-07-11 2005-10-20 Kopp Heinrich Ag Circuit breaker
US5629662A (en) * 1995-02-01 1997-05-13 Siemens Energy & Automation, Inc. Low energy memory metal actuated latch
DE29620519U1 (en) * 1996-11-25 1997-02-06 Kopp Heinrich Ag Contact arrangement for residual current circuit breakers
DE102005041232B4 (en) * 2005-08-31 2009-11-26 Abb Ag Electrical switching device
DE102005041231B4 (en) * 2005-08-31 2009-11-26 Abb Ag Electrical switching device
US7863534B2 (en) 2008-04-15 2011-01-04 General Electric Company Spring discharge mechanism for circuit breaker
CN102789931B (en) * 2012-07-27 2015-03-25 法泰电器（江苏）股份有限公司 Arc extinguishing device of circuit breaker with reverse current protection
SI25414B (en) * 2017-04-13 2021-04-30 Nela Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. Security electric switch with improved contact assembly
CN114496676A (en) * 2020-10-26 2022-05-13 西门子能源国际公司 Arc contact assembly and circuit breaker

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Publication number Publication date
ES2071819T3 (en) 1995-07-01
WO1990013903A1 (en) 1990-11-15
HK12196A (en) 1996-02-02
US5151674A (en) 1992-09-29
DE3915127C1 (en) 1990-09-06
DK0427826T3 (en) 1995-06-26
ATE121562T1 (en) 1995-05-15
EP0427826A1 (en) 1991-05-22

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