EP1134767B1 - Magnetisch wirkende Auslösevorrichtung für einen Schutzschalter, und elektrischer Schutzapparat ausgerüstet mit einer solchen Vorrichtung - Google Patents

Magnetisch wirkende Auslösevorrichtung für einen Schutzschalter, und elektrischer Schutzapparat ausgerüstet mit einer solchen Vorrichtung Download PDF

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Publication number
EP1134767B1
EP1134767B1 EP20010410015 EP01410015A EP1134767B1 EP 1134767 B1 EP1134767 B1 EP 1134767B1 EP 20010410015 EP20010410015 EP 20010410015 EP 01410015 A EP01410015 A EP 01410015A EP 1134767 B1 EP1134767 B1 EP 1134767B1
Authority
EP
European Patent Office
Prior art keywords
magnetic
coil
rod
circuit breaker
horn
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
EP20010410015
Other languages
English (en)
French (fr)
Other versions
EP1134767A1 (de
Inventor
Jacques Bally Berard
Yannick Gustin
Eric Panaye
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1134767A1 publication Critical patent/EP1134767A1/de
Application granted granted Critical
Publication of EP1134767B1 publication Critical patent/EP1134767B1/de
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
    • 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
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the present invention relates to a magnetic tripping device in particular for a circuit breaker and an electrical protection device comprising such a device.
  • the document EP 0 444 283 describes a device according to the preamble of claim 1.
  • Low-voltage circuit breakers generally comprise, in a manner known per se, magnetic tripping means capable of causing tripping of the circuit-breaker mechanism during a sudden rise in current, for example due to a short-circuit, and thermal tripping means. capable of causing tripping of the circuit breaker mechanism in the event of an overload resulting in a slow rise in current.
  • magnetic triggering means comprise an induction coil mounted around a striker rod associated with a movable core, the assembly being slidably mounted inside a sleeve, the rod sliding inside a fixed core fixed inside the sheath. The rod is supported by one of its ends on the movable core.
  • a spring mounted around the rod is interposed between the two cores and is able to return the two cores in a separate position, in the rest position of the trigger.
  • This device further comprises a carcass mounted around the assembly constituted by the cores and the firing pin, and electrically connected to the fixed contact of the apparatus, said carcass being able to channel the magnetic field generated by the coil.
  • a magnetic field is generated by the coil.
  • the movable core moves towards the fixed core against the force of the spring and causes in its movement the rod, which causes the unlocking, by the striker formed to the end of the rod, the circuit breaker mechanism and the opening of the contacts.
  • the present invention solves these disadvantages and proposes a magnetic tripping device of simple design, reduced size, and whose operation has been made more reliable, and an electrical protection device such as a circuit breaker comprising such a device.
  • the present invention relates to a magnetic tripping device, in particular for an electrical protection device such as a circuit breaker, able to cause a triggering of the opening mechanism of the fixed and movable contacts of the device during a sudden rise in current following for example a short circuit, comprising exclusively a core said mobile core associated with a rod, the assembly being slidably mounted inside a sheath, a coil traversed by the current to monitor and able to generate, when this current exceeds a certain threshold, a magnetic field capable of causing the displacement of the movable core and the rod between a rest position and a position in which a striker end of the rod controls the triggering of the aforementioned mechanism, a means for channeling the magnetic field generated by the coil and an arc horn electrically connected to one of the contacts and adapted to guide r the arc during the cut in the direction of the arc extinguishing chamber, this device being characterized in that the means for channeling the magnetic field is constituted by the aforementioned arc horn
  • the aforementioned rod is integral with the movable core.
  • the present invention further relates to an electrical protection device, including a circuit breaker, having the previous characteristics taken alone or in combination.
  • a low voltage electrical circuit breaker D intended to be used to protect an electrical circuit against overloads or short circuits.
  • This circuit breaker D comprises mainly, in a manner known per se, a pair of detachable contacts 1.2 respectively fixed and movable, a control mechanism 3 for opening and closing the contacts actuated by a lever 4, an electromagnetic trigger 5 for triggering the mechanism 3 of the circuit breaker D and thus causing the opening of the contacts 1.2 when a short-circuit current occurs, and a thermal trigger 6 (not shown) able to trigger the mechanism 3 when the appearance of a current overload.
  • This device 5 comprises a so-called fixed core 6 fixed in a sheath 7, a mobile core 8 slidably mounted inside said sleeve 7, a rod 9 slidably mounted inside the fixed core 6 parallel to the sliding direction of the movable core 8, a spring 10 interposed between the two cores 6,8 and a induction coil 11 mounted around the sleeve 7.
  • This device further comprises a carcass 12 mounted around the sleeve 7 so as to channel the magnetic flux generated by the coil 11, and an arc horn 13 electrically connected to the fixed contact 1 of the circuit breaker and to guide the arc towards the extinction chamber C during the cut.
  • the aforementioned rod 9 comprises a first end 9a bearing on the movable core 8 and a second end 9b forming a striker.
  • the coil 11 When the current is above a certain threshold, the coil 11 generates a magnetic field capable of counteracting the force of the spring 10 and moving the movable core 8 towards the fixed core 6.
  • This mobile core 8 drives into its movement the firing pin, which acts on the trigger bar 14 of the device and causes the unlocking mechanism 3.
  • the flow generated by the coil 11 passes through the carcass 12 (as illustrated by the arrows), and is channeled by said carcass 12 so as to obtain a maximum yield of the magnetic field.
  • the arc current passes through the arc horn 13 and goes to the arc extinction chamber C.
  • the breaking capacity associated with such a device is about 20kA.
  • the magnetic tripping device 5 does not have a carcass for channeling the magnetic field. This function is performed by the arc horn 13 itself secured to the fixed contact which, when the coil 11 generates a magnetic field, is crossed by the corresponding magnetic flux and thus channels this flow.
  • the device no longer has a fixed core, whereby the magnetic threshold is independent of the gap between fixed core and mobile core contrary to what was the case in the prior art.
  • the expression "exclusively a mobile core” should be interpreted as meaning that the device does not have a fixed kernel.
  • the spring 10 is interposed between a portion of the sheath 7 and the movable core 8.
  • the rod 9 is integral with the movable core 8.
  • the arc horn is continuous and extends parallel to the axis of the coil over a certain length, which allows the arc to perform only one switching.
  • the operation of the device is the same as that of the device of the prior art and will therefore not be described again, except for one hand, that the mobile core 8 is no longer attracted by the fixed core 6, l the magnetic force generated by the coil 11 being sufficient to move the movable contact 8.
  • the breaking capacity is limited to 10 kA.
  • a magnetic release device of simple design which is economical and has a reduced overall size, has been realized in view of a smaller number of used parts. It also results from this reduction in the number of parts, a reduction in the number of positioning constraints making the operation of the device more reliable.
  • the magnetic threshold being independent of the air gap, it is no longer to be precisely adjusted.
  • the length of the movable core can be reduced in view of the fact that it no longer cooperates with the carcass.

Claims (4)

  1. Magnetauslöseeinrichtung, insbesondere für ein elektrisches Schutzgerät wie beispielsweise einen Leistungsschalter, die in der Lage ist, bei einem sprungartigen Anstieg des Stroms aufgrund z.B. eines Kurzschlusses eine Auslösung des Schaltmechanismus' zur Trennung des feststehenden und des beweglichen Schaltstücks des Schaltgeräts zu bewirken, und ausschließlich einen, als beweglichen Kern bezeichneten und einer Stange zugeordneten Kern umfasst, wobei die Einheit aus Kern und Stange verschiebbar in einem Tragkörper gelagert ist, und darüber hinaus eine von dem zu überwachenden Strom durchflossene Spule, die in der Lage ist, bei Überschreiten eines bestimmten Schwellwerts dieses Stroms ein Magnetfeld zu erzeugen, das die Verschiebung des beweglichen Kerns und der Stange von einer Ruhestellung in eine Stellung bewirken kann, in der ein als Schlagstift ausgelegtes Ende der Stange die Auslösung des genannten Mechanismus' bewirkt, ein Mittel zur Führung des von der Spule erzeugten Magnetfelds und ein Lichtbogenhorn umfasst, das elektrisch mit einem der Schaltstücke verbunden und in der Lage ist, den Lichtbogen während der Abschaltung in Richtung der Lichtbogenlöschkammer zu treiben,
    dadurch gekennzeichnet, dass das Mittel zur Führung des Magnetfelds aus dem genannten Lichtbogenhorn (13) besteht, welches Horn (13) elektrisch mit dem feststehenden Lichtbogenkontakt verbunden ist und ein verlängertes Lichtbogenhorn umfasst, das parallel zur Achse der Spule angeordnet ist, welches Horn so ausgebildet ist, dass der von der Spule (11) erzeugte magnetische Fluss vom beweglichen Kern (8) ausgehend nacheinander das feststehende Schaltstück (1) des Schaltgeräts und das Lichtbogenhorn (13) durchsetzt, bevor er erneut in den beweglichen Kern (8) eintritt.
  2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die genannte Stange (9) mit dem beweglichen Kern (8) verbunden ist
  3. Elektrisches Schutzgerät mit einer Magnetauslöseeinrichtung nach einem der Ansprüche 1 oder 2.
  4. Leistungsschalter mit einer Magnetauslöseeinrichtung nach irgendeinem der Ansprüche 1 bis 3.
EP20010410015 2000-03-14 2001-02-12 Magnetisch wirkende Auslösevorrichtung für einen Schutzschalter, und elektrischer Schutzapparat ausgerüstet mit einer solchen Vorrichtung Expired - Lifetime EP1134767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0003213 2000-03-14
FR0003213A FR2806522B1 (fr) 2000-03-14 2000-03-14 Dispositif de declenchement magnetique notamment pour disjoncteur, et appareil de protection electrique comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP1134767A1 EP1134767A1 (de) 2001-09-19
EP1134767B1 true EP1134767B1 (de) 2009-03-25

Family

ID=8848040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010410015 Expired - Lifetime EP1134767B1 (de) 2000-03-14 2001-02-12 Magnetisch wirkende Auslösevorrichtung für einen Schutzschalter, und elektrischer Schutzapparat ausgerüstet mit einer solchen Vorrichtung

Country Status (9)

Country Link
EP (1) EP1134767B1 (de)
CN (1) CN1211824C (de)
BR (1) BRPI0100953B1 (de)
EA (1) EA003756B1 (de)
ES (1) ES2321582T3 (de)
FR (1) FR2806522B1 (de)
ID (1) ID29672A (de)
PT (1) PT1134767E (de)
ZA (1) ZA200101931B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261838A1 (de) * 2002-12-20 2004-07-22 Siemens Ag Anordnung zum Störlichtbogenschutz einer Sammelschienenanordnung
US7515025B2 (en) * 2006-12-20 2009-04-07 General Electric Company Current trip unit for circuit breaker
DE102009021771A1 (de) * 2009-05-18 2010-11-25 Abb Ag Elektromagnetischer Auslöser und Schaltgerät
CN102074427B (zh) * 2011-01-13 2013-04-10 武汉中直电气股份有限公司 寿命较长的快速断路器
CN110622274A (zh) * 2017-05-15 2019-12-27 阿尔法纳公司 用于微型断路器的瞬时跳闸装置和包括该跳闸装置的微型断路器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225736A1 (de) * 1982-07-09 1984-01-12 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer leitungsschutzschalter
CH670170A5 (de) * 1986-04-07 1989-05-12 Sprecher & Schuh Ag
DE8611282U1 (de) * 1986-04-24 1986-06-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Löschkammer eines Leitungsschutzschalters
FR2634589B1 (fr) * 1988-07-25 1990-09-07 Merlin Gerin Disjoncteur miniature a carcasse du declencheur electromagnetique agencee en support de la bilame
DE9002197U1 (de) * 1990-02-24 1991-06-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De

Also Published As

Publication number Publication date
ID29672A (id) 2001-09-20
ZA200101931B (en) 2001-09-12
CN1211824C (zh) 2005-07-20
ES2321582T3 (es) 2009-06-09
PT1134767E (pt) 2009-04-28
EA003756B1 (ru) 2003-08-28
BR0100953A (pt) 2001-10-30
FR2806522B1 (fr) 2003-09-19
CN1313622A (zh) 2001-09-19
EA200100238A1 (ru) 2001-10-22
FR2806522A1 (fr) 2001-09-21
EP1134767A1 (de) 2001-09-19
BRPI0100953B1 (pt) 2016-03-08

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