EP1926119A1 - Automatic cut-out - Google Patents

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Publication number
EP1926119A1
EP1926119A1 EP07120992A EP07120992A EP1926119A1 EP 1926119 A1 EP1926119 A1 EP 1926119A1 EP 07120992 A EP07120992 A EP 07120992A EP 07120992 A EP07120992 A EP 07120992A EP 1926119 A1 EP1926119 A1 EP 1926119A1
Authority
EP
European Patent Office
Prior art keywords
circuit
circuit breaker
short
release system
armature
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
EP07120992A
Other languages
German (de)
French (fr)
Other versions
EP1926119B1 (en
Inventor
Christian Albrecht
Gunther Eckert
Christian Hoffmann
Christoph Weber
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1926119A1 publication Critical patent/EP1926119A1/en
Application granted granted Critical
Publication of EP1926119B1 publication Critical patent/EP1926119B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

  • the invention relates to a circuit breaker.
  • a circuit breaker has a short-circuit release system and an overload trip system.
  • the short-circuit release system interrupts the flow of current between a first terminal of the circuit breaker and a second terminal of the circuit breaker, so the flow of current through the circuit breaker, if this current is extremely high, so is a short-circuit current.
  • Typical short-circuit release systems are magnetic release systems.
  • the overload release system interrupts the flow of current through the circuit breaker if the flowing current is consistently slightly too high, ie permanently exceeds a limit.
  • the overload trip system typically includes a bimetallic element that acts on a latch.
  • the problem is the so-called selectivity. If several circuit breakers are connected in series, the principle should apply that the circuit breaker closest to the consumer is the one which shuts off in the event of a short circuit. Although it is in principle possible to provide for the upstream circuit breaker and the downstream circuit breaker two completely different types, but preferably the way is pursued to make the circuit breaker customizable. So revealed the DE 103 59 985 A1 a protective switching device with adjustable characteristic: In a circuit breaker, the trip current limit of the magnetic trip system is variable. Either several magnet systems are provided, a multi-tap winding, the iron system on the winding is variable, or a spring force acting on a magnetic armature of the magnetic system is variable.
  • the object is achieved in that the short-circuit release system can be switched off, so that the current flow can only be interrupted by the overload release system.
  • the invention thus selects a particularly radical solution: Instead of increasing the tripping current limit for the short-circuit tripping system compared to a downstream circuit breaker as before for the upstream circuit breaker, the short-circuit tripping is now completely left to the downstream circuit breaker, and the upstream circuit breaker only interrupts the short-circuit current its bimetal. Naturally, this radical solution is accompanied by a particularly simple construction.
  • the short-circuit release system is a magnetic release system, namely an anchor with a plunger, which is movable by a coil in order to act with the plunger on a movable contact element and / or a pawl of a switching mechanism, can be provided as a simple measure in that the anchor has a recess. The shutdown is done via a bolt, which then engages in the recess.
  • the bolt suppresses any movement of the armature in its engagement in the recess, which is associated with a particular stability of the system, but it can also be provided as a cost-effective solution that the bolt by his intervention in the recess a only limited movement of the anchor allows, but not sufficient, that the latch acts on the movable contact element and / or the pawl or only opens the contact, but does not trigger.
  • the latter has the advantage that the short-circuit current is limited.
  • the solution is particularly simple if the bolt is moved directly by an operator, for. B. on the outside of the circuit breaker protrudes like a button and only has to be inserted.
  • a circuit In a circuit breaker, a circuit is closed or opened by pushing a movable contact element 10, through which the current can flow, against an immovable contact element 12 or just moving it away from it.
  • the movable contact element 10 often carries the name "moving contact” and the immovable contact element 12 the name "fixed contact”.
  • the overload release system includes a bimetallic element, not shown in the FIG, which acts on a switching mechanism of which only one pawl 14 is shown in the FIG. About the switching mechanism 14, the movable contact element 10 is moved away from the stationary contact element 12.
  • the short-circuit release system illustrated in FIG. 1 comprises a coil 16 arranged in the current path, in which a movable armature 18 is arranged, on which a plunger 20 is formed.
  • the magnetic field generated by the coil 16 is so high that the armature 18 is moved against the force of a spring 22 (in the FIG right) and triggers both the pawl 14 of the switch lock and the movable contact element 10 of immovable Contact element 12 pushes away.
  • the short-circuit release system as a whole can be completely switched off.
  • the armature 18 has a recess 24.
  • the circuit breaker further comprises a latch 26 (also referred to as a slider markable), with one end fitting into the recess 24th hineinschiebbar is pushed in or vice versa is again pushed out (see double arrow 28). If the latch 26 is pushed into the recess 24, the latch 26 blocks the armature 18, the armature 18 can not or only slightly moved even with a current flowing through the coil 16 short-circuit current and actuates neither the pawl 14, nor does it beat the movable contact element 10 away. The simple insertion of the bolt 26 thus the entire short-circuit release system can be switched off.

Abstract

The circuit breaker has a short circuit triggering system e.g. magnetic triggering system such as anchor (18), interrupting current flow via the breaker during a short circuit. An overload triggering system e.g. bimetal element, interrupts the flow via the breaker during stable exceeding of a limit value. The short circuit triggering system is detachable such that the flow is interrupted only by the overload triggering system. The anchor has a plunger (20) that is movable by a coil (16), and a recess (24) in which a locking bar (26) is engaged to detach the short circuit triggering system.

Description

Die Erfindung betrifft einen Leitungsschutzschalter.The invention relates to a circuit breaker.

Ein Leitungsschutzschalter weist ein Kurzschlussauslösesystem und ein Überlastauslösesystem auf. Das Kurzschlussauslösesystem unterbricht den Stromfluss zwischen einem ersten Anschluss des Leitungsschutzschalters und einem zweiten Anschluss des Leitungsschutzschalters, also den Stromfluss durch den Leitungsschutzschalter, wenn dieser Strom extrem hoch ist, also ein Kurzschlussstrom ist. Übliche Kurzschlussauslösesysteme sind magnetische Auslösesysteme. Das Überlastauslösesystem unterbricht den Stromfluss durch den Leitungsschutzschalter, wenn der fließende Strom beständig etwas zu hoch ist, also dauerhaft einen Grenzwert überschreitet. Das Überlastauslösesystem umfasst typischerweise ein Bimetallelement, das auf ein Schaltschloss einwirkt.A circuit breaker has a short-circuit release system and an overload trip system. The short-circuit release system interrupts the flow of current between a first terminal of the circuit breaker and a second terminal of the circuit breaker, so the flow of current through the circuit breaker, if this current is extremely high, so is a short-circuit current. Typical short-circuit release systems are magnetic release systems. The overload release system interrupts the flow of current through the circuit breaker if the flowing current is consistently slightly too high, ie permanently exceeds a limit. The overload trip system typically includes a bimetallic element that acts on a latch.

Vorliegend geht es um die Problematik der so genannten Selektivität. Sind mehrere Leitungsschutzschalter hintereinander geschaltet, so soll das Prinzip gelten, dass der jeweils dem Verbraucher am nächsten liegende Leitungsschutzschalter derjenige ist, der bei einem Kurzschluss abschaltet. Zwar ist es grundsätzlich möglich, für den vorgeordneten Leitungsschutzschalter und den nachgeordneten Leitungsschutzschalter zwei völlig unterschiedliche Bautypen vorzusehen, bevorzugt wird jedoch der Weg verfolgt, den Leitungsschutzschalter anpassbar zu machen. So offenbart die DE 103 59 985 A1 eine Schutzschaltvorrichtung mit einstellbarer Charakteristik: In einem Leitungsschutzschalter ist die Auslösestromgrenze des magnetischen Auslösesystems variabel. Es werden entweder mehrere Magnetsysteme bereitgestellt, eine Wicklung mit mehreren Abgriffen, das Eisensystem an der Wicklung ist variabel, oder auch eine Federkraft, welche auf einen Magnetanker des magnetischen Systems wirkt, ist variabel.In the present case, the problem is the so-called selectivity. If several circuit breakers are connected in series, the principle should apply that the circuit breaker closest to the consumer is the one which shuts off in the event of a short circuit. Although it is in principle possible to provide for the upstream circuit breaker and the downstream circuit breaker two completely different types, but preferably the way is pursued to make the circuit breaker customizable. So revealed the DE 103 59 985 A1 a protective switching device with adjustable characteristic: In a circuit breaker, the trip current limit of the magnetic trip system is variable. Either several magnet systems are provided, a multi-tap winding, the iron system on the winding is variable, or a spring force acting on a magnetic armature of the magnetic system is variable.

Es ist Aufgabe der vorliegenden Erfindung, einen sowohl vorgeordnet als auch nachgeordnet einsetzbaren Leitungsschutzschalter bereitzustellen, der eine besonders einfache Bauweise hat.It is an object of the present invention to provide a both upstream and downstream deployable circuit breaker, which has a particularly simple construction.

Die Aufgabe wird dadurch gelöst, dass das Kurzschlussauslösesystem abschaltbar ist, so dass der Stromfluss nur noch durch das Überlastauslösesystem unterbrechbar ist. Die Erfindung wählt somit eine besonders radikale Lösung: Anstatt wie bisher für den vorgeordneten Leitungsschutzschalter die Auslösestromgrenze für das Kurzschlussauslösesystem im Vergleich zu einem nachgeordneten Leitungsschutzschalter zu erhöhen, wird nun die Kurzschlussauslösung vollständig dem nachgeordneten Leitungsschutzschalter überlassen, und der vorgeordnete Leitungsschutzschalter unterbricht den Kurzschlussstrom nur noch über sein Bimetall. Naturgemäß geht diese radikale Lösung mit einer besonders einfachen Bauweise einher.The object is achieved in that the short-circuit release system can be switched off, so that the current flow can only be interrupted by the overload release system. The invention thus selects a particularly radical solution: Instead of increasing the tripping current limit for the short-circuit tripping system compared to a downstream circuit breaker as before for the upstream circuit breaker, the short-circuit tripping is now completely left to the downstream circuit breaker, and the upstream circuit breaker only interrupts the short-circuit current its bimetal. Naturally, this radical solution is accompanied by a particularly simple construction.

Beim üblichen Fall, dass das Kurzschlussauslösesystem ein magnetisches Auslösesystem ist, nämlich einen Anker mit einem Stößel umfasst, der durch eine Spule bewegbar ist, um mit dem Stößel auf ein bewegliches Kontaktelement und/oder eine Klinke eines Schaltschlosses einzuwirken, kann als einfache Maßnahme vorgesehen sein, dass der Anker eine Aussparung aufweist. Das Abschalten erfolgt über einen Riegel, der dann in die Aussparung eingreift.In the usual case that the short-circuit release system is a magnetic release system, namely an anchor with a plunger, which is movable by a coil in order to act with the plunger on a movable contact element and / or a pawl of a switching mechanism, can be provided as a simple measure in that the anchor has a recess. The shutdown is done via a bolt, which then engages in the recess.

Es kann alternativ vorgesehen sein, dass der Riegel jede Bewegung des Ankers bei seinem Eingreifen in die Aussparung unterdrückt, was mit einer besonderen Stabilität des Systems einhergeht, es kann aber auch als kostengünstige Lösung vorgesehen sein, dass der Riegel durch sein Eingreifen in die Aussparung eine nur noch eingeschränkte Bewegung des Ankers zulässt, die aber nicht ausreicht, dass der Riegel auf das bewegliche Kontaktelement und/oder die Klinke einwirkt oder nur den Kontakt öffnet, aber nicht auslöst. Letzteres hat den Vorteil, dass der Kurzschlussstrom begrenzt wird.It may alternatively be provided that the bolt suppresses any movement of the armature in its engagement in the recess, which is associated with a particular stability of the system, but it can also be provided as a cost-effective solution that the bolt by his intervention in the recess a only limited movement of the anchor allows, but not sufficient, that the latch acts on the movable contact element and / or the pawl or only opens the contact, but does not trigger. The latter has the advantage that the short-circuit current is limited.

Besonders einfach wird die Lösung, wenn der Riegel direkt durch eine Bedienperson bewegbar ist, z. B. an der Außenseite des Leitungsschutzschalters wie ein Knopf heraussteht und lediglich eingeschoben werden muss.The solution is particularly simple if the bolt is moved directly by an operator, for. B. on the outside of the circuit breaker protrudes like a button and only has to be inserted.

Nachfolgend wird eine bevorzugte Ausführungsform der Erfindung unter Bezug auf die Zeichnung beschrieben, welche schematisch das Kurzschlussauslösesystem eines erfindungsgemäßen Leitungsschutzschalters veranschaulicht.Hereinafter, a preferred embodiment of the invention will be described with reference to the drawing, which schematically illustrates the short-circuit release system of a circuit breaker according to the invention.

In einem Leitungsschutzschalter wird ein Stromkreis dadurch geschlossen oder geöffnet, dass ein bewegliches Kontaktelement 10, durch das der Strom fließen kann, gegen ein unbewegliches Kontaktelement 12 gedrückt wird oder gerade umgekehrt von ihm wegbewegt wird. Das bewegliche Kontaktelement 10 trägt häufig auch den Namen "Bewegkontakt" und das unbewegliche Kontaktelement 12 den Namen "Festkontakt". Zum Überlastauslösesystem gehört ein in der FIG nicht gezeigtes Bimetallelement, das auf ein Schaltschloss einwirkt, von dem in der FIG lediglich eine Klinke 14 dargestellt ist. Über das Schaltschloss 14 wird das bewegliche Kontaktelement 10 von dem unbeweglichen Kontaktelement 12 wegbewegt.In a circuit breaker, a circuit is closed or opened by pushing a movable contact element 10, through which the current can flow, against an immovable contact element 12 or just moving it away from it. The movable contact element 10 often carries the name "moving contact" and the immovable contact element 12 the name "fixed contact". The overload release system includes a bimetallic element, not shown in the FIG, which acts on a switching mechanism of which only one pawl 14 is shown in the FIG. About the switching mechanism 14, the movable contact element 10 is moved away from the stationary contact element 12.

Das in der FIG dargestellte Kurzschlussauslösesystem umfasst eine im Strompfad angeordnete Spule 16, in der ein beweglicher Anker 18 angeordnet ist, an dem ein Stößel 20 ausgebildet ist. Bei einem Kurzschlussstrom wird das von der Spule 16 erzeugte Magnetfeld so hoch, dass der Anker 18 gegen die Kraft einer Feder 22 bewegt wird (in der FIG nach rechts) und sowohl die Klinke 14 des Schaltschlosses auslöst als auch das bewegliche Kontaktelement 10 von dem unbeweglichen Kontaktelement 12 wegstößt.The short-circuit release system illustrated in FIG. 1 comprises a coil 16 arranged in the current path, in which a movable armature 18 is arranged, on which a plunger 20 is formed. In a short-circuit current, the magnetic field generated by the coil 16 is so high that the armature 18 is moved against the force of a spring 22 (in the FIG right) and triggers both the pawl 14 of the switch lock and the movable contact element 10 of immovable Contact element 12 pushes away.

Es ist nun erfindungsgemäß vorgesehen, dass das Kurzschlussauslösesystem als Ganzes völlig abschaltbar ist. Hierzu weist der Anker 18 eine Aussparung 24 auf. Der Leitungsschutzschalter umfasst ferner einen Riegel 26 (auch als Schieber bezeichenbar), der mit einem Ende passgenau in die Aussparung 24 hineinschiebbar ist oder auch umgekehrt wieder herausschiebbar ist (siehe Doppelpfeil 28). Wird der Riegel 26 in die Aussparung 24 hineingeschoben, blockiert der Riegel 26 den Anker 18, der Anker 18 kann auch bei einem durch die Spule 16 fließenden Kurzschlussstrom nicht oder nur gering bewegt werden und betätigt weder die Klinke 14, noch schlägt er das bewegliche Kontaktelement 10 weg. Durch das einfache Einschieben des Riegels 26 ist somit das gesamte Kurzschlussauslösesystem abschaltbar.It is now provided according to the invention that the short-circuit release system as a whole can be completely switched off. For this purpose, the armature 18 has a recess 24. The circuit breaker further comprises a latch 26 (also referred to as a slider markable), with one end fitting into the recess 24th hineinschiebbar is pushed in or vice versa is again pushed out (see double arrow 28). If the latch 26 is pushed into the recess 24, the latch 26 blocks the armature 18, the armature 18 can not or only slightly moved even with a current flowing through the coil 16 short-circuit current and actuates neither the pawl 14, nor does it beat the movable contact element 10 away. The simple insertion of the bolt 26 thus the entire short-circuit release system can be switched off.

Es versteht sich von selbst, dass das Abschalten des Kurzschlussauslösesystems nur dann sinnvoll ist, wenn ein weiterer Leitungsschutzschalter nachgeordnet geschaltet ist, dessen Kurzschlussauslösesystem nicht abgeschaltet ist.It goes without saying that switching off the short-circuit release system only makes sense if another circuit breaker is connected downstream, the short-circuit release system is not turned off.

Um zu vermeiden, dass versehentlich der Riegel 26 betätigt wird, ist es denkbar, eine elektronische Überwachung bereitzustellen, z. B. mithilfe von Sensoren, welche erfassen, ob ein weiterer Leitungsschutzschalter nachgeordnet geschaltet ist.In order to avoid that accidentally the latch 26 is actuated, it is conceivable to provide an electronic monitoring, z. B. using sensors that detect whether another circuit breaker is connected downstream.

Claims (5)

Leitungsschutzschalter,
mit einem Kurzschlussauslösesystem, das bei einem durch den Leitungsschutzschalter fließenden Kurzschluss den Stromfluss unterbricht, und
mit einem Überlastauslösesystem, das bei dauerhaftem Überschreiten eines Grenzwerts durch einen durch den Leitungsschutzschalter fließenden Strom den Stromfluss unterbricht,
dadurch gekennzeichnet, dass
das Kurzschlussauslösesystem abschaltbar ist, so dass der Stromfluss nur noch durch das Überlastauslösesystem unterbrechbar ist.Circuit breakers
with a short-circuit release system, which interrupts the current flow at a short circuit flowing through the circuit breaker, and
with an overload release system which interrupts the current flow if a limit is permanently exceeded by a current flowing through the circuit breaker,
characterized in that
the short circuit tripping system can be switched off, so that the current flow can only be interrupted by the overload tripping system. Leitungsschutzschalter nach Anspruch 1, bei dem das Kurzschlussauslösesystem einen Anker (18) mit einem Stößel (20) umfasst, der durch eine Spule (16) bewegbar ist, um mit dem Stößel (20) auf ein bewegliches Kontaktelement (10) und/oder eine Klinke (14) eines Schaltschlosses einzuwirken,
dadurch gekennzeichnet, dass
der Anker (18) eine Aussparung (24) aufweist, in die zum Abschalten des Kurzschlussauslösesystems ein Riegel (26) eingreift.Circuit breaker according to claim 1, wherein the short-circuit release system comprises an armature (18) with a plunger (20) which is movable by a coil (16), with the plunger (20) on a movable contact element (10) and / or a Pawl (14) of a switching mechanism to act,
characterized in that
the armature (18) has a recess (24) into which a latch (26) engages to switch off the short-circuit release system. Leitungsschutzschalter nach Anspruch 2,
dadurch gekennzeichnet, dass
der Riegel (26) jede Bewegung des Ankers (18) bei seinem Eingreifen in die Aussparung unterdrückt.Circuit breaker according to claim 2,
characterized in that
the latch (26) suppresses any movement of the armature (18) as it engages the recess. Leitungsschutzschalter nach Anspruch 2,
dadurch gekennzeichnet, dass
der Riegel (26) durch sein Eingreifen in die Aussparung (24) eine nur noch eingeschränkte Bewegung des Ankers (18) zulässt, die aber nicht ausreicht, dass der Riegel (26) auf das bewegliche Kontaktelement (10) und/oder die Klinke (14) einwirkt oder die das bewegliche Kontaktelement (10) zwar abhebt, aber keine Auslösung bewirkt.Circuit breaker according to claim 2,
characterized in that
the bolt (26) by its engagement in the recess (24) allows only limited movement of the armature (18), but that is not sufficient that the bolt (26) on the movable contact element (10) and / or the pawl ( 14) acts or the mobile contact element (10) lifts off, but causes no triggering. Leitungsschutzschalter nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, dass
der Riegel (26) direkt durch eine Bedienperson bewegbar ist.Circuit breaker according to one of claims 2 to 4,
characterized in that
the latch (26) is movable directly by an operator.
EP07120992A 2006-11-23 2007-11-19 Automatic cut-out Not-in-force EP1926119B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006055382A DE102006055382A1 (en) 2006-11-23 2006-11-23 Circuit breaker

Publications (2)

Publication Number Publication Date
EP1926119A1 true EP1926119A1 (en) 2008-05-28
EP1926119B1 EP1926119B1 (en) 2009-09-16

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Country Status (5)

Country Link
EP (1) EP1926119B1 (en)
CN (1) CN101188175B (en)
AT (1) ATE443341T1 (en)
DE (2) DE102006055382A1 (en)
ES (1) ES2329417T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103545151A (en) * 2013-10-30 2014-01-29 桂林机床电器有限公司 Circuit protection switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8471654B1 (en) * 2012-10-25 2013-06-25 General Electric Company Circuit protection device and flux shifter for a circuit protection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5381120A (en) * 1993-11-15 1995-01-10 General Electric Company Molded case circuit breaker thermal-magnetic trip unit
EP1544886A2 (en) * 2003-12-19 2005-06-22 Siemens Aktiengesellschaft Circuit breaker device with adjustable characteristic

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2598027B1 (en) * 1986-04-23 1990-10-12 Telemecanique Electrique PROTECTED INVERTER CONTACTOR DEVICE CONTAINING CURRENT OVERCURRENTS
DE19636109C1 (en) * 1996-09-05 1997-12-18 Siemens Ag Circuit breaker with auxiliary switch
DE19716380C1 (en) * 1997-04-18 1998-10-08 Siemens Ag Electromagnetic switching device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5381120A (en) * 1993-11-15 1995-01-10 General Electric Company Molded case circuit breaker thermal-magnetic trip unit
EP1544886A2 (en) * 2003-12-19 2005-06-22 Siemens Aktiengesellschaft Circuit breaker device with adjustable characteristic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103545151A (en) * 2013-10-30 2014-01-29 桂林机床电器有限公司 Circuit protection switch

Also Published As

Publication number Publication date
ES2329417T3 (en) 2009-11-25
CN101188175A (en) 2008-05-28
DE102006055382A1 (en) 2008-05-29
DE502007001532D1 (en) 2009-10-29
CN101188175B (en) 2012-04-04
ATE443341T1 (en) 2009-10-15
EP1926119B1 (en) 2009-09-16

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