EP2905794B1 - Statischer Kontaktträger für einen Schutzschalter und Schutzschalter damit - Google Patents

Statischer Kontaktträger für einen Schutzschalter und Schutzschalter damit Download PDF

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Publication number
EP2905794B1
EP2905794B1 EP14197126.7A EP14197126A EP2905794B1 EP 2905794 B1 EP2905794 B1 EP 2905794B1 EP 14197126 A EP14197126 A EP 14197126A EP 2905794 B1 EP2905794 B1 EP 2905794B1
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EP
European Patent Office
Prior art keywords
static contact
circuit breaker
base layer
contact support
support
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.)
Active
Application number
EP14197126.7A
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English (en)
French (fr)
Other versions
EP2905794A1 (de
Inventor
Zhang Yao Bao
Xian SHEN
Yang Wang
Gang Zhou
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
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Siemens AG
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Publication date
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Publication of EP2905794A1 publication Critical patent/EP2905794A1/de
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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
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/025—Composite material having copper as the basic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable

Definitions

  • the present invention relates to a static contact support, in particular to a static contact support for a small circuit breaker.
  • the current in a circuit under normal operating conditions can be established, carried and cut off by joining and separating a moving contact and a static contact.
  • a micro circuit breaker can also carry and cut off an abnormal current within a given time in specified scenarios, for example under abnormal operating conditions such as overload and open circuit.
  • a static contact is mounted on a static contact support.
  • the static contact support carries a very large current, and must also channel the arc produced between the moving and static contacts to an arc extinguishing system disposed in the circuit breaker.
  • Existing static contact supports are made of copper-plated steel or pure copper.
  • Static contact mounting supports of copper-plated steel have very good mechanical strength, but high resistivity, so generate a lot of heat when carrying a current.
  • Static mounting supports of pure copper have low resistivity, but also low mechanical strength and low magnetic permeability, so they are unable to extinguish the arc produced between the moving and static contacts.
  • an electrical contact device in particular for low-voltage switches and contractors is disclosed.
  • the electrical contact device comprises a contact element produced in one piece.
  • Said contact element comprises in particular a first conducting area and a second contact area, said first area and said second area being produced with materials of different type.
  • a moving element for a low voltage switching device and a switching device comprising said moving element comprises for each pole a housing unit suitable to receive an elastic element which interacts with an electrical contact.
  • This latter comprises a first contact portion susceptible to contact a further electrical contact and a second portion connectable to a conductive element of the switching device.
  • a switch-gear contact with electrodynamic reinforcement of contact pressure is disclosed, which comprises a resiliently mounted pivotal part for abutting engagement with a contact and supported on a rigid part having portions substantially at right angles, with the part parallel and close to the pivotal part so that the current assists contact pressure.
  • breaking circuit In breaking circuit the contact is tilted by a spring so that the leading edge first makes contact before a break is made at the raised portion so that arcing at the portion is avoided. Owing to the hairpin shape of the current path the arc tends to be blown outwards by the electrodynamic forces.
  • a multi-pole circuit breaker which includes a base and a cover of molded insulating material, an operating mechanism and a trip device.
  • An object of the present invention is to provide a static contact support for a circuit breaker, which can help to extinguish an arc produced between a moving contact and a static contact in a circuit breaker.
  • Another object of the present invention is to provide a circuit breaker which uses the static contact support.
  • the present invention provides a static contact support for a circuit breaker, comprising a base layer and a reinforcing layer.
  • the base layer is for transferring current passing through the circuit breaker.
  • the reinforcing layer is superposed on the base layer, can provide the base layer with structural support, and can attract an arc produced between a moving contact and a static contact in the circuit breaker into an arc extinguishing mechanism of the circuit breaker, wherein the reinforcing layer and the base layer are superposed by a process for combining metals.
  • an electrically conductive base layer on the one hand means that current flowing through the static contact support produces very little heat; on the other hand, good heat-conducting properties in the base layer enable the static contact support to cool the arc, helping to extinguish it.
  • the reinforcing layer has good mechanical strength and magnetic permeability. On the one hand, this means it can reinforce the mechanical strength of the base layer; on the other hand, the magnetically permeable reinforcing layer can channel the arc into the arc extinguishing mechanism of the circuit breaker, so it is extinguished quickly. Furthermore, being superposed, the base layer and reinforcing layer can be conveniently fitted into the circuit breaker.
  • the base layer is made of copper metal.
  • the reinforcing layer is made of steel.
  • the ratio of the thickness of the base layer to the thickness of the reinforcing layer is 1 - 2.5 : 1.
  • the present invention also provides a circuit breaker, comprising a moving contact assembly and a static contact assembly.
  • the moving contact assembly comprises a moving contact support and a moving contact disposed on the moving contact support.
  • the static contact assembly comprises a static contact support as described above, and a static contact disposed on the static contact support and capable of contacting the moving contact.
  • the side of the static contact support which is close to the moving contact assembly is the base layer, while the side of the static contact support which is remote from the moving contact assembly is the reinforcing layer.
  • the static contact is connected to the base layer.
  • Fig. 1 is a structural schematic diagram intended to illustrate a schematic embodiment of a static contact support for a circuit breaker.
  • the circuit breaker comprises a static contact assembly 10 and a moving contact assembly 20.
  • the static contact assembly 10 comprises a static contact support 12 and a static contact 14.
  • the static contact 14 can be mounted on the static contact support 12.
  • the static contact support 12 comprises a base layer 122 and a reinforcing layer 124; the reinforcing layer 124 is superposed on the base layer 122.
  • the base layer 122 is made of a material with good heat-conducting and electricity-conducting properties, such as copper metal; the reinforcing layer 124 is made of a material with good mechanical strength and magnetic permeability, such as steel.
  • the reinforcing layer 124 is superposed on the base layer 122 by a process for combining two metals.
  • the moving contact assembly 20 comprises a moving contact support 22 and a moving contact 24; the moving contact 24 can be mounted on the moving contact support 22.
  • the side of the static contact support 12 which is close to the moving contact assembly 20 is the base layer 122, while the side of the static contact support which is remote from the moving contact assembly 20 is the reinforcing layer 124.
  • the static contact 14 which contacts the moving contact 24 is connected to the base layer 122.
  • the path formed by the static contact and base layer for conducting electricity and heat is the shortest, while the reinforcing layer can provide the base layer with mechanical support, and attract the arc between the moving contact and static contact into an arc extinguishing mechanism.
  • the base layer has good electricity-conducting and heat-conducting properties.
  • the reinforcing layer has good mechanical strength and magnetic permeability. On the one hand, this means it can reinforce the mechanical strength of the base layer; on the other hand, the magnetically permeable reinforcing layer can channel the arc into the arc extinguishing mechanism of the circuit breaker, so it is extinguished quickly. Furthermore, being superposed, the base layer and reinforcing layer can be conveniently fitted into the circuit breaker.
  • the static contact support for a circuit breaker, by adjusting the ratio of the thicknesses of the base layer and reinforcing layer, it is possible to adjust the heat-conducting properties, electricity-conducting properties, mechanical strength and magnetic permeability of the static contact support correspondingly.
  • the base layer is thicker, the static contact support has better heat-conducting and electricity-conducting properties, whereas when the reinforcing layer is thicker, the static contact support has better mechanical strength and magnetic permeability.
  • the ratio of the thickness of the base layer to the thickness of the reinforcing layer could be 2.5 : 1 or 1 : 1.

Claims (7)

  1. Statischer Kontaktträger (12) für einen Schutzschalter, dadurch gekennzeichnet, dass er Folgendes umfasst:
    eine Basisschicht (122) zum Übertragen von Strom, der den Schutzschalter passiert; und
    eine Verstärkungsschicht (124), die auf der Basisschicht (122) überlagert ist und der Basisschicht (122) einen strukturellen Träger bereitstellen kann, dadurch gekennzeichnet, dass
    die Verstärkungsschicht (124) einen Lichtbogen, der zwischen einem beweglichen Kontakt und einem statischen Kontakt in dem Schutzschalter erzeugt wird, in einen Lichtbogenlösch-Mechanismus des Schutzschalters anziehen kann, wobei die Verstärkungsschicht (124) und die Basisschicht (122) durch einen Prozess zum Kombinieren von zwei Metallen überlagert sind.
  2. Statischer Kontaktträger nach Anspruch 1, wobei die Basisschicht (122) aus Kupfer-Metall angefertigt ist.
  3. Statischer Kontaktträger nach einem der vorhergehenden Ansprüche, wobei die Verstärkungsschicht (124) aus Stahl angefertigt ist.
  4. Statischer Kontaktträger nach einem der vorhergehenden Ansprüche, wobei das Verhältnis der Dicke der Basisschicht zu der Dicke der Verstärkungsschicht 1 bis 2,5 : 1 beträgt.
  5. Schutzschalter, dadurch gekennzeichnet, dass er Folgendes umfasst:
    eine bewegliche Kontakteinheit (20), die einen beweglichen Kontaktträger (22) und einen beweglichen Kontakt (24) umfasst, der auf dem beweglichen Kontaktträger (22) angeordnet ist; und
    eine statische Kontakteinheit (10), die einen statischen Kontaktträger (12) nach einem der Ansprüche 1 bis 5 und einen statischen Kontakt (14) umfasst, der auf dem statischen Kontaktträger (12) angeordnet ist und in der Lage ist, den beweglichen Kontakt (24) zu kontaktieren.
  6. Schutzschalter nach Anspruch 5, wobei die Seite des statischen Kontaktträgers (12), die der beweglichen Kontakteinheit (20) nahe ist, die Basisschicht (122) ist, während der Seite des statischen Kontaktträgers, die von der beweglichen Kontakteinheit (20) entfernt ist, die Verstärkungsschicht (124) ist.
  7. Schutzschalter nach Anspruch 5 oder 6, wobei der statische Kontakt (14) mit der Basisschicht (122) verbunden ist.
EP14197126.7A 2014-01-07 2014-12-10 Statischer Kontaktträger für einen Schutzschalter und Schutzschalter damit Active EP2905794B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410006862.5A CN104766770B (zh) 2014-01-07 2014-01-07 断路器的静触头支架及其断路器

Publications (2)

Publication Number Publication Date
EP2905794A1 EP2905794A1 (de) 2015-08-12
EP2905794B1 true EP2905794B1 (de) 2018-04-25

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ID=52013957

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EP14197126.7A Active EP2905794B1 (de) 2014-01-07 2014-12-10 Statischer Kontaktträger für einen Schutzschalter und Schutzschalter damit

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EP (1) EP2905794B1 (de)
CN (1) CN104766770B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106783428A (zh) * 2016-10-13 2017-05-31 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） 一种用于电磁斥力机构的组合型斥力盘

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1164164A (en) * 1915-03-01 1915-12-14 William Borer Wrench.
US2788421A (en) * 1953-05-12 1957-04-09 Westinghouse Electric Corp Circuit breaker contact structure
DE1175776B (de) 1962-01-31 1964-08-13 Siemens Ag Kontaktbruecke fuer elektrische Schaltgeraete
DE3142883A1 (de) 1981-10-29 1983-05-11 Schiele Kg, 7746 Hornberg Elektrisches schaltstueck
EP0079977A1 (de) 1981-11-21 1983-06-01 Sprecher & Schuh AG Kontaktstück für ein elektrisches Schaltgerät, insbesondere für ein Schütz
DE19830232A1 (de) 1998-07-07 2000-01-13 Abb Research Ltd Stromkontaktanordnungen eines Stromschalters
DE10019121A1 (de) 2000-04-18 2001-10-25 Moeller Gmbh Elektrischer Schaltkontakt und Verfahren zu dessen Herstellung

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Publication number Priority date Publication date Assignee Title
AT251684B (de) * 1963-09-11 1967-01-10 Licentia Gmbh Elektrisches Kontaktstück
CN2188237Y (zh) * 1993-12-09 1995-01-25 中南工学院 弹性接触导电元件经强化的闸刀开关
ITBG20050020A1 (it) * 2005-05-11 2006-11-12 Abb Service Srl Contatto elettrico pluricomponente
CN2924772Y (zh) * 2005-12-05 2007-07-18 北京Abb低压电器有限公司 用于微型断路器的静触座、灭弧系统及微型断路器
ITMI20090011A1 (it) * 2009-01-08 2010-07-09 Abb Spa Equipaggio mobile per un dispositivo di interruzione di bassa tensione e dispositivo di interruzione comprendente tale equipaggio mobile.
CN201622989U (zh) * 2009-11-26 2010-11-03 无锡唯特电气技术有限公司 具有高分断能力的小型断路器
JP5705738B2 (ja) * 2010-02-12 2015-04-22 古河電気工業株式会社 可動接点部品用銀被覆複合材料とその製造方法および可動接点部品
CN201673850U (zh) * 2010-04-26 2010-12-15 南京业基电气设备有限公司 负荷开关主回路动静触头装置
CN202473620U (zh) * 2012-03-12 2012-10-03 毕新华 铜钢一体式静触头
CN202585291U (zh) * 2012-05-16 2012-12-05 上海良信电器股份有限公司 小型断路器的一体化热磁系统支架

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1164164A (en) * 1915-03-01 1915-12-14 William Borer Wrench.
US2788421A (en) * 1953-05-12 1957-04-09 Westinghouse Electric Corp Circuit breaker contact structure
DE1175776B (de) 1962-01-31 1964-08-13 Siemens Ag Kontaktbruecke fuer elektrische Schaltgeraete
DE3142883A1 (de) 1981-10-29 1983-05-11 Schiele Kg, 7746 Hornberg Elektrisches schaltstueck
EP0079977A1 (de) 1981-11-21 1983-06-01 Sprecher & Schuh AG Kontaktstück für ein elektrisches Schaltgerät, insbesondere für ein Schütz
DE19830232A1 (de) 1998-07-07 2000-01-13 Abb Research Ltd Stromkontaktanordnungen eines Stromschalters
DE10019121A1 (de) 2000-04-18 2001-10-25 Moeller Gmbh Elektrischer Schaltkontakt und Verfahren zu dessen Herstellung

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CN104766770B (zh) 2017-09-08
CN104766770A (zh) 2015-07-08
EP2905794A1 (de) 2015-08-12

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