[go: up one dir, main page]

EP0114231A1 - Overcurrent protection device - Google Patents

Overcurrent protection device Download PDF

Info

Publication number
EP0114231A1
EP0114231A1 EP83111424A EP83111424A EP0114231A1 EP 0114231 A1 EP0114231 A1 EP 0114231A1 EP 83111424 A EP83111424 A EP 83111424A EP 83111424 A EP83111424 A EP 83111424A EP 0114231 A1 EP0114231 A1 EP 0114231A1
Authority
EP
European Patent Office
Prior art keywords
contactor
armature
plunger
overcurrent protection
further electromagnet
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.)
Withdrawn
Application number
EP83111424A
Other languages
German (de)
French (fr)
Inventor
Anton Ing. Happach (Grad.)
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.)
Schaltbau GmbH
Original Assignee
Schaltbau GmbH
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 Schaltbau GmbH filed Critical Schaltbau GmbH
Publication of EP0114231A1 publication Critical patent/EP0114231A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/26—Electromagnetic mechanisms with windings acting in opposition

Definitions

  • the invention relates to an overcurrent protection for an electrical circuit, which is closed by means of a contactor, by means of the armature of which is actuated indirectly against a return spring by releasing a further spring which is weaker than the return spring and which generates the contact pressure, one or more contact pairs and whose magnetic core has an axially continuous bore that is freely accessible on the side facing away from the armature.
  • Diving anchorers of the type described in the previous paragraph are e.g. B. from DE-AS 24 18 930 known. They are usually described in such a way that the current in the field winding is increased until the armature is tightened and thus until the contacts moved over the armature are closed. After tightening, the winding current is reduced to the holding current if the need to save electricity, for example in trackless battery vehicles, is reduced.
  • Such known contactors only serve as electromagnetically operated switching devices and require the conventional design to protect the circuits they switch against overcurrents of additional fuse means. This naturally requires a larger amount of space, which is particularly undesirable in mobile systems such as trackless battery vehicles or electric vehicles.
  • overcurrent protection according to the invention is explained with reference to the exemplary embodiment of an overcurrent protection according to the invention, which is provided with submersible anchors and is shown in a partially schematic illustration in FIG. 1.
  • the contactor designed as a conventional diving anchor contactor is generally designated 1. It consists of a winding 2 which surrounds the magnetic core 3, which holds the pole ring 5 via the yoke 4 shown in dashed lines and runs out into the pole ring 6 on the other side.
  • the diving anchor contactor 1 is shown in the working position.
  • the plunger 7 is tightened against the return spring 8. It releases a further spring 30, which is weaker than the return spring 8 and generates the contact pressure with which the contact bridge 9 rests on the fixed contacts 10 and 11.
  • the return spring 8 rests on the one hand in a blind hole 13 on the plunger armature 7 and on the other hand on a shoulder 14 machined out of the magnetic core 3.
  • the magnetic core 3 also has a continuous central bore 15.
  • the overcurrent protection according to the invention consists of a further electromagnet, which is generally designated 16.
  • This in turn has a magnetic core 17 with a yoke 18 and the pole rings 19 and 20.
  • Its winding 21 consisting of a few turns is electrically connected in series with the contact system 9, 10, 11 of the plunger armature contactor 1.
  • the magnetic core 17 also has a through bore 22 which is aligned with the bore 15 in the magnetic core 3 of the plunger armature 1.
  • the immersion armature 23 of the immersion armature magnet 16, which is in the non-excited state in the position shown, is fastened to a plunger 24 which passes through both bores 22 and 15 and the return spring 8.
  • the length of the plunger 24 is such that, as shown, it maintains a distance 25 in the rest position of the plunger armature magnet 16 and in the working position of the plunger armature contactor 1 from its plunger armature 7 in the blind hole 13, which distance 25 is smaller than the stroke 26 of the plunger armature magnet 16.
  • the plunger armature 23 is attracted. Since the stroke of the plunger 23 is greater than the distance 25 of the plunger 24 from the plunger 7 and is directed against its direction of movement and since the plunger 7 is held against the return spring 8, the plunger 24 impacts the plunger 7 from its position shown driven out and thus the contact system 9, 10, 11 opened.
  • the length of the plunger 24 can be changed according to the invention via its attachment to the plunger armature 23 at 27.
  • Fig. 2 shows an example of the embodiment according to the invention with a. Folding anchor is provided.
  • the components, their arrangement and their function are largely the same as those in FIG. 1. There is only a difference insofar as this is necessary due to the use of hinged armatures 28 and 29 in the contactor and in the further electromagnet.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)

Abstract

Überstromschutz für einen mittels eines elektromagnetischen Schützes (1) geschlossenen und durch den Haltestrom des Schützes geschlossen gehaltenen Stromkreis. In dem überwachten Stromkreis liegt ein weiterer Elektromagnet (16), dessen Anker (23) bei Auftreten eines Überstromes anzieht und dadurch mit mechanischem Stoß auf den Anker (7) des Schützes diesen gegen die Wirkung des Haltestromes in Ruhestellung treibt und so den Kontakt (9-10/9-11) öffnet.Overcurrent protection for a circuit closed by means of an electromagnetic contactor (1) and kept closed by the holding current of the contactor. In the monitored circuit there is a further electromagnet (16), the armature (23) of which pulls when an overcurrent occurs and thereby drives the armature (7) of the contactor into the rest position against the action of the holding current and thus contacts (9 -10 / 9-11) opens.

Description

Die Erfindung bezieht sich auf einen Überstromschutz für einen elektrischen Stromkreis, der mittels eines Schützes geschlossen wird, durch dessen Anker gegen eine Rückstellfeder mittelbar durch Freigabe einer weiteren Feder, die schwächer ist als die Rückstellfeder und die den Kontaktdruck erzeugt, ein oder mehrere Kontaktpaare betätigt werden und dessen Magnetkern eine axial durchgehende Bohrung aufweist, die an der dem Anker abgewandten Seite frei zugänglich ist.The invention relates to an overcurrent protection for an electrical circuit, which is closed by means of a contactor, by means of the armature of which is actuated indirectly against a return spring by releasing a further spring which is weaker than the return spring and which generates the contact pressure, one or more contact pairs and whose magnetic core has an axially continuous bore that is freely accessible on the side facing away from the armature.

Tauchankerschütze der im vorhergehenden Absatz beschriebenen Art sind z. B. aus der DE-AS 24 18 930 bekannt. Sie werden gewöhnlich derart beschrieben, daß der Strom in der Erregerwicklung bis zum Anziehen des Ankers und damit bis zum Schließen der über den Anker bewegten Kontakte erhöht wird. Nach dem Anziehen wird bei dem Erfordernis der Stromeinsparung, zum Beispiel in gleislosen Batteriefahrzeugen, der Wicklungsstrom bis auf den Haltestrom vermindert. Solche bekannten Schütze dienen lediglich als elektromagnetisch betätigte Schaltgeräte und bedürfen zur Absicherung der von ihnen geschalteten Stromkreise gegen Überströme zusätzlicher Sicherungsmittel der herkömmlichen Bauweise. Damit ist naturgemäß ein größerer Raumbedarf erforderlich, was besonders bei mobilen Anlagen, wie gleislosen Batteriefahrzeugen oder Elektrokraftwagen, nicht erwünscht ist.Diving anchorers of the type described in the previous paragraph are e.g. B. from DE-AS 24 18 930 known. They are usually described in such a way that the current in the field winding is increased until the armature is tightened and thus until the contacts moved over the armature are closed. After tightening, the winding current is reduced to the holding current if the need to save electricity, for example in trackless battery vehicles, is reduced. Such known contactors only serve as electromagnetically operated switching devices and require the conventional design to protect the circuits they switch against overcurrents of additional fuse means. This naturally requires a larger amount of space, which is particularly undesirable in mobile systems such as trackless battery vehicles or electric vehicles.

Der Erfindung liegt die Aufgabe zugrunde, für Schütze der eingangs beschriebenen Art einen Überstromschutz anzugeben, der bei gleicher Funktionssicherheit wie die bekannten Sicherungsmittel in möglichst kompakter Bauform mit dem Schütz verbunden ist. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß achsgleich zu der Bohrung ein weiterer Elektromagnet vorhanden ist,

  • - dessen Wicklung von einem durch das Schütz in Arbeitsstellung eingeschalteten, auf Überstrom zu überwachenden Strom durchflossen ist,
  • - dessen Anker sich bei Betätigung gegensinnig zu dem des Schützes bewegt,
  • - und dessen Magnetkern ebenfalls eine durchgehende, mit der Bohrung des Magnetkernes des Schützes fluchtende Bohrung aufweist,
  • - dessen Luftspalt so bemessen ist, daß der bei Nennwert des durch seine Wicklung fließenden Stromes nicht anzieht und
  • - daß die beiden Bohrungen von einem am Anker des weiteren Elektromagneten befestigten Stößel durchsetzt sind, dessen Längen so bemessen ist, daß er in Ruhestellung des weiteren Elektromagneten und in Arbeitsstellung des Schützes von dessen Anker einen Abstand kleiner als der Hub des weiteren Elektromagneten einhält.
The object of the invention is to provide an overcurrent protection for contactors of the type described in the introduction, which is connected to the contactor in the most compact possible form with the same functional reliability as the known fuse means. The object is achieved in that another electromagnet is present coaxially with the bore,
  • whose winding is traversed by a current which is switched on by the contactor in the working position and is to be monitored for overcurrent,
  • - whose armature moves in the opposite direction to that of the contactor when actuated,
  • the magnetic core also has a continuous bore aligned with the bore of the magnetic core of the contactor,
  • - The air gap is dimensioned so that the does not attract at nominal value of the current flowing through its winding and
  • - That the two holes are penetrated by a plunger attached to the armature of the further electromagnet, the lengths of which are dimensioned such that it maintains a distance smaller than the stroke of the further electromagnet in the rest position of the further electromagnet and in the working position of the contactor from the armature thereof.

Weitere Einzelheiten sowie die Funktionsweise des erfindungsgemäßen Überstromschutzes werden anhand des in der Fig. 1 in zum Teil schematischer Darstellung gezeigten Ausführungsbeispiels eines erfindungsgemäßen,mit Tauchankern versehenen überstromschutzes erläutert.Further details and the mode of operation of the overcurrent protection according to the invention are explained with reference to the exemplary embodiment of an overcurrent protection according to the invention, which is provided with submersible anchors and is shown in a partially schematic illustration in FIG. 1.

Das als herkömmliches Tauchankerschütz ausgebildete Schütz ist allgemein mit 1 bezeichnet. Es besteht aus einer Wicklung 2, die den Magnetkern 3 umgibt, der über das gestrichelt dargestellte Joch 4 den Polring 5 hält und auf der anderen Seite in den Polring 6 ausläuft. Das Tauchankerschütz 1 ist in Arbeitsstellung dargestellt. Der Tauchanker 7 ist gegen die Rückstellfeder 8 angezogen. Er gibt dabei eine weitere Feder 30 frei, die schwächer ist als die Rückstellfeder 8 und den Kontaktdruck erzeugt,mit dem die Kontaktbrücke 9 auf den festen Kontakten 10 und 11 aufliegt. Die Rückstellfeder 8 liegt einerseits in einem Sackloch 13 an dem Tauchanker 7 und andererseits an einer aus dem Magnetkern 3 herausgearbeiteten Schulter 14 an. Der Magnetkern 3 weist weiterhin eine durchgehende zentrale-Bohrung 15 auf.The contactor designed as a conventional diving anchor contactor is generally designated 1. It consists of a winding 2 which surrounds the magnetic core 3, which holds the pole ring 5 via the yoke 4 shown in dashed lines and runs out into the pole ring 6 on the other side. The diving anchor contactor 1 is shown in the working position. The plunger 7 is tightened against the return spring 8. It releases a further spring 30, which is weaker than the return spring 8 and generates the contact pressure with which the contact bridge 9 rests on the fixed contacts 10 and 11. The return spring 8 rests on the one hand in a blind hole 13 on the plunger armature 7 and on the other hand on a shoulder 14 machined out of the magnetic core 3. The magnetic core 3 also has a continuous central bore 15.

Der erfindungsgemäße Oberstromschutz besteht aus einem weiteren Elektromagneten, der allgemein mit 16 bezeichnet ist. Dieser hat seinerseits einen Magnetkern 17 mit einem Joch 18 und den Polringen 19 und 20. Seine aus wenigen Windungen bestehende Wicklung 21 ist elektrisch mit dem Kontaktsystem 9, 10, 11 des Tauchankerschützes 1 in Reihe geschaltet. Der Magnetkern 17 weist ebenfalls eine durchgehende Bohrung 22 auf, die mit der Bohrung 15 im Magnetkern 3 des Tauchankerschützes 1 fluchtet. Der im nichterregten Zustand in der dargestellten Lage befindliche Tauchanker 23 des Tauchankermagneten 16 ist an einem Stößel 24 befestigt, der beide Bohrungen 22 und 15 sowie die Rückstellfeder 8 durchsetzt. Der Stößel 24 ist in seiner Länge so bemessen, daß er, wie dargestellt, in Ruhestellung des Tauchankermagneten 16 und in Arbeitsstellung des Tauchankerschützes 1 von dessen Tauchanker 7 im Sackloch 13 einen Abstand 25 einhält, der kleiner ist als der Hub 26 des Tauchankermagneten 16.The overcurrent protection according to the invention consists of a further electromagnet, which is generally designated 16. This in turn has a magnetic core 17 with a yoke 18 and the pole rings 19 and 20. Its winding 21 consisting of a few turns is electrically connected in series with the contact system 9, 10, 11 of the plunger armature contactor 1. The magnetic core 17 also has a through bore 22 which is aligned with the bore 15 in the magnetic core 3 of the plunger armature 1. The immersion armature 23 of the immersion armature magnet 16, which is in the non-excited state in the position shown, is fastened to a plunger 24 which passes through both bores 22 and 15 and the return spring 8. The length of the plunger 24 is such that, as shown, it maintains a distance 25 in the rest position of the plunger armature magnet 16 and in the working position of the plunger armature contactor 1 from its plunger armature 7 in the blind hole 13, which distance 25 is smaller than the stroke 26 of the plunger armature magnet 16.

Steigt nun der Strom in dem Kontaktsystem 9, 10 und 11 des Tauchankerschützes 1 und damit auch der in der Wicklung 21 des Tauchankermagneten 16 über das zulässige Maß, so wird dessen Tauchanker 23 angezogen. Da der Hub des Tauchankers 23 größer ist als der Abstand 25 des Stößels 24 vom Tauchanker 7 und gegen dessen Bewegungsrichtung gerichtet ist und da der Tauchanker 7 gegen die Rückstellfeder 8 gehalten ist, wird durch den Aufprall des Stößels 24 der Tauchanker 7 aus seiner dargestellten Lage herausgetrieben und damit das Kontaktsystem 9, 10, 11 geöffnet.If the current in the contact system 9, 10 and 11 of the plunger armature 1 and thus also in the winding 21 of the plunger magnet 16 rises above the permissible level, the plunger armature 23 is attracted. Since the stroke of the plunger 23 is greater than the distance 25 of the plunger 24 from the plunger 7 and is directed against its direction of movement and since the plunger 7 is held against the return spring 8, the plunger 24 impacts the plunger 7 from its position shown driven out and thus the contact system 9, 10, 11 opened.

Um die Empfindlichkeit des Tauchankermagneten 16 einzustellen, ist der Stößel 24 über seine Befestigung an dem Tauchanker 23 bei 27 erfindungsgemäß in seiner Länge veränderbar.In order to adjust the sensitivity of the plunger armature magnet 16, the length of the plunger 24 can be changed according to the invention via its attachment to the plunger armature 23 at 27.

Fig. 2 zeigt ein Beispiel der Ausführungsform, die erfindungsgemäß mit einem . Klappanker versehen ist. Die Bauelemente, ihre Anordnung und ihre Funktion sind weitgehend gleich denen nach Fig. 1. Ein Unterschied besteht nur, soweit dies durch die Verwendung von Klappankern 28 und 29 im Schütz und in dem weiteren Elektromagneten erforderlich ist.Fig. 2 shows an example of the embodiment according to the invention with a. Folding anchor is provided. The components, their arrangement and their function are largely the same as those in FIG. 1. There is only a difference insofar as this is necessary due to the use of hinged armatures 28 and 29 in the contactor and in the further electromagnet.

Claims (4)

1. Überstromschutz für einen elektrischen Stromkreis, der mittels eines Schützes geschlossen wird, durch dessen Anker gegen eine Rückstellfeder mittelbar durch Freigabe einer-weiteren Feder, die schwächer ist als die Rückstellfeder und die den Kontaktdruck erzeugt, ein oder mehrere Kontaktpaare betätigt werden und dessen Magnetkern eine axiale durchgehende Bohrung aufweist, die an der dem Anker abgewandten Seite frei zugänglich ist, dadurch gekennzeichnet, daß ein weiterer Elektromagnet (16) vorhanden ist, - dessen Wicklung (21) von einem durch das Schütz in Arbeitsstellung eingeschalteten,auf überstrom zu überwachenden Strom durchflossen ist, - dessen Anker (23) sich bei Betätigung gegensinnig zu dem des Schützes (1) bewegt - und dessen Magnetkern (17) ebenfalls eine durchgehende, mit der Bohrung (15) des Magnetkerns (3) des Schützes (1) fluchtende Bohrung (22) aufweist, - dessen Luftspalt so bemessen ist, daß er bei Nennwert des durch seine Wicklung fließenden Stromes nicht anzieht und - daß die beiden Bohrungen (15, 22) von einem am Anker (23) des weiteren Elektromagneten (16) befestigten Stößel (24) durchsetzt sind, dessen Länge so bemessen ist, daß er in Ruhestellung des weiteren Elektromagneten (16) und in Arbeitstellung des Schützes (1) von dessen Anker (7) eirnr Abstand kleiner als der Hub (26) des weiteren Elektromagneten (16) einhält. 1. Overcurrent protection for an electrical circuit, which is closed by means of a contactor, by means of whose armature against a return spring indirectly by releasing another spring, which is weaker than the return spring and which generates the contact pressure, one or more contact pairs and its magnetic core has an axial through bore which is freely accessible on the side facing away from the armature, characterized in that a further electromagnet (16) is present, - whose winding (21) is traversed by a current which is switched on by the contactor in the working position and is to be monitored for overcurrent - The armature (23) moves in opposite directions to that of the contactor (1) when actuated - And whose magnetic core (17) also has a continuous bore (22) aligned with the bore (15) of the magnetic core (3) of the contactor (1), - The air gap is dimensioned so that it does not attract at nominal value of the current flowing through its winding and - That the two bores (15, 22) are penetrated by a plunger (24) attached to the armature (23) of the further electromagnet (16), the length of which is dimensioned such that it is in the rest position of the further electromagnet (16) and in the working position the contactor (1) from its armature (7) maintains a distance smaller than the stroke (26) of the further electromagnet (16). 2. Überstromschutz nach Anspruch 1, dadurch gekennzeichnet, daß die Länge des Stößels (24) über seine Befestigung (27) an dem Tauchanker (23) des Tauchankermagneten einstellbar ist.2. Overcurrent protection according to claim 1, characterized in that the length of the plunger (24) via its attachment (27) on the plunger (23) of the plunger magnet is adjustable. 3. Überstromschutz nach Anspruch 1, dadurch gekennzeichnet, daß sowohl das Schütz (1) als auch der weitere Elektromagnet (16) einen Tauchanker (7, 23) aufweisen.3. Overcurrent protection according to claim 1, characterized in that both the contactor (1) and the further electromagnet (16) have a plunger (7, 23). 4. Überstromschutz nach Anspruch 1, dadurch gekennzeichnet, daß sowohl das das Schütz als auch der weitere Elektromagnet einen Klappanker (28, 29) aufweisen.4. Overcurrent protection according to claim 1, characterized in that both the contactor and the further electromagnet have a hinged armature (28, 29).
EP83111424A 1983-01-24 1983-11-15 Overcurrent protection device Withdrawn EP0114231A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3302229 1983-01-24
DE3302229 1983-01-24

Publications (1)

Publication Number Publication Date
EP0114231A1 true EP0114231A1 (en) 1984-08-01

Family

ID=6189053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111424A Withdrawn EP0114231A1 (en) 1983-01-24 1983-11-15 Overcurrent protection device

Country Status (3)

Country Link
US (1) US4491812A (en)
EP (1) EP0114231A1 (en)
JP (1) JPS59141137A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022612A1 (en) * 1989-08-12 1991-02-21 Eichhoff Werke Overcurrent protection relay with excitation and load windings - wound on common core but in opposite senses so that overcurrent induces magnetic field overcoming excitation field
DE9115607U1 (en) * 1991-12-17 1992-02-13 ABB Patent GmbH, 6800 Mannheim Circuit breaker
DE4124190A1 (en) * 1991-07-20 1993-01-21 Abb Patent Gmbh Network protection circuit for monitoring and isolating due to fault - measures current difference between at least one outgoing lead and neutral lead to detect fault or earth leakage
WO2013020783A1 (en) * 2011-07-20 2013-02-14 Tyco Electronics Amp Gmbh Switching device comprising an overload protection device and a first and a second operating member

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931758A (en) * 1988-12-09 1990-06-05 Circuit Breaker Industries Limited Electro-magnetic shunt trip device
DE19602118C2 (en) * 1996-01-22 1999-12-30 Siemens Ag Electrical switching device
WO1998040898A2 (en) * 1997-03-08 1998-09-17 Blp Components Limited Two pole contactor
DE19716380C1 (en) * 1997-04-18 1998-10-08 Siemens Ag Electromagnetic switching device
DE19960755A1 (en) * 1999-12-16 2001-07-05 Ellenberger & Poensgen Simulation switch
US8729984B2 (en) * 2011-06-06 2014-05-20 Rockwell Automation Technologies, Inc. Magnetic actuator with more than one air gap in series
DE102012106108A1 (en) * 2012-07-06 2014-01-09 Tyco Electronics Amp Gmbh Electrical switching device and method for switching selbiger with contact separation in case of backup
JP6778908B2 (en) * 2019-07-03 2020-11-04 パナソニックＩｐマネジメント株式会社 Electromagnetic relay

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571392C (en) * 1930-10-25 1933-02-28 Aeg Single-pole or multi-pole contactor with an energized switching magnet and an overcurrent release that is independent of the magnetic flux of the switching magnet
DE1202888B (en) * 1961-06-27 1965-10-14 Licentia Gmbh Electromagnetic release for electrical circuit breakers
DE2418930B2 (en) * 1973-04-19 1977-06-16 Square D Co., Park Ridge, 111. (V-StA.) DC ACTUATED ELECTROMAGNETIC DIVING ANCHOR PROTECTION
DE2848287A1 (en) * 1977-11-08 1979-05-10 Telemecanique Electrique MAGNETIC SWITCH WITH AN OVERCURRENT-SENSITIVE ELECTROMAGNET FOR LIMITING AND INTERRUPTING EXCESSIVE CURRENTS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1297979A (en) * 1916-04-07 1919-03-18 Ind Controller Company Magnetically-controlled switch.
US2901210A (en) * 1953-06-29 1959-08-25 Phillips Petroleum Co Electro-magnetic device
GB1432372A (en) * 1972-07-26 1976-04-14 Lucas Electrical Ltd Solenoid operated switch assemblies

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571392C (en) * 1930-10-25 1933-02-28 Aeg Single-pole or multi-pole contactor with an energized switching magnet and an overcurrent release that is independent of the magnetic flux of the switching magnet
DE1202888B (en) * 1961-06-27 1965-10-14 Licentia Gmbh Electromagnetic release for electrical circuit breakers
DE2418930B2 (en) * 1973-04-19 1977-06-16 Square D Co., Park Ridge, 111. (V-StA.) DC ACTUATED ELECTROMAGNETIC DIVING ANCHOR PROTECTION
DE2848287A1 (en) * 1977-11-08 1979-05-10 Telemecanique Electrique MAGNETIC SWITCH WITH AN OVERCURRENT-SENSITIVE ELECTROMAGNET FOR LIMITING AND INTERRUPTING EXCESSIVE CURRENTS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022612A1 (en) * 1989-08-12 1991-02-21 Eichhoff Werke Overcurrent protection relay with excitation and load windings - wound on common core but in opposite senses so that overcurrent induces magnetic field overcoming excitation field
DE4124190A1 (en) * 1991-07-20 1993-01-21 Abb Patent Gmbh Network protection circuit for monitoring and isolating due to fault - measures current difference between at least one outgoing lead and neutral lead to detect fault or earth leakage
DE9115607U1 (en) * 1991-12-17 1992-02-13 ABB Patent GmbH, 6800 Mannheim Circuit breaker
WO2013020783A1 (en) * 2011-07-20 2013-02-14 Tyco Electronics Amp Gmbh Switching device comprising an overload protection device and a first and a second operating member
DE102011052003B4 (en) 2011-07-20 2022-06-15 Te Connectivity Germany Gmbh Switching device with overload protection device and a first and a second actuating member

Also Published As

Publication number Publication date
US4491812A (en) 1985-01-01
JPS59141137A (en) 1984-08-13

Similar Documents

Publication Publication Date Title
EP0156184A2 (en) Additional unit for a circuit-breaker with an overcurrent release
EP0114231A1 (en) Overcurrent protection device
EP0228345B1 (en) Magnetic-release mechanism for an earth fault circuit breaker
EP2383764A1 (en) Bistable relay
EP0727802A2 (en) ELectromagnetic switching device, in particular contactor
DE102010035857A1 (en) Magnet system for use in e.g. main circuit breaker in industrial application, has armature retained by permanent magnets and holding plate in starting position and after exceedance of preset short circuit current value to drive striker pin
DE3823101A1 (en) REDUNDANT RELEASE DEVICE
EP0954894A1 (en) Reverse battery protecting device for the on-board electric network of a vehicle
EP1053556B1 (en) Electromagnetic current releasing device for electrical circuit breaker
DE4040359C2 (en) Short-circuit protection device
EP0806071A1 (en) Overvoltage protector
EP1218909B1 (en) Load-disconnecting switch, especially for use in motor vehicles
DE510928C (en) Train protection device
DE102018216292A1 (en) Electromagnetic release for electromagnetic switchgear with an angled structure
DE3005460C2 (en) Electromagnetic switch
DE437698C (en) Polarized electromagnetic switch
DE102008029188B4 (en) Submersible armature assembly with different trip ranges
DE3508768A1 (en) ELECTROMAGNETIC LINEAR DRIVE DEVICE
DE2058182A1 (en) Voltage-dependent switching relay
DE1037593B (en) Poled electromagnet system
DE4445961A1 (en) Electric motor control device
DE102005034644B4 (en) Residual current circuit breaker with additional release switch
DE875241C (en) Fast relay
WO2005027170A1 (en) Switching device comprising fault current tripping, and corresponding method
DE766170C (en) Arrangement to display or to compensate for uneven loading of power converters working in parallel via magnetically acting power dividers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850401

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAPPACH, ANTON, ING. (GRAD.)