EP0876671A1 - Appareil de commutation electrique - Google Patents

Appareil de commutation electrique

Info

Publication number
EP0876671A1
EP0876671A1 EP97914045A EP97914045A EP0876671A1 EP 0876671 A1 EP0876671 A1 EP 0876671A1 EP 97914045 A EP97914045 A EP 97914045A EP 97914045 A EP97914045 A EP 97914045A EP 0876671 A1 EP0876671 A1 EP 0876671A1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
movable
iron core
contact bridge
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
EP97914045A
Other languages
German (de)
English (en)
Other versions
EP0876671B1 (fr
Inventor
Markus Meier
Bardo Koppmann
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 EP0876671A1 publication Critical patent/EP0876671A1/fr
Application granted granted Critical
Publication of EP0876671B1 publication Critical patent/EP0876671B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts

Definitions

  • the invention relates to an electrical switching device with a movable contact element with a pair of movable contacts thereon, a pair of fixed contact elements to which the fixed contacts are individually fastened, a first electromagnetic drive device with a fixed iron core, a movable iron core and a coil which is electrically connected in series with one of the fixed contacts and a second electromagnetic drive device, which comprises a yoke, an armature and a winding, for switching the load current on and off via a transmission element.
  • a so-called n-release is provided as an auxiliary magnet system, on the armature of which a plunger is attached, which serves to open the contacts when overcurrents occur. This is intended to prevent welding of the contacts as a result of overcurrents, the occurrence of which causes the contacts to be more or less separated depending on the current with the formation of arcs.
  • the plunger is guided in the cylindrical cavity of a tubular contact bridge support which can be actuated via a lever by a main magnet system for switching the load current on and off.
  • the auxiliary magnet system is located below the contact arrangement in such a way that the axial line of the plunger is aligned with the longitudinal center axis of the contact bridge carrier.
  • the main magnet system is next to the auxiliary magnet system, i.e. arranged laterally offset to the longitudinal center axis of the contact bridge carrier.
  • DE-OS 28 48 287 discloses a magnetic switch in which the contacts for switching the load circuit on and off are quickly opened when overcurrents occur.
  • the Magnetic switch is an overcurrent sensitive device with a winding through which the load current flows and a magnetic core which is provided with an impact pin.
  • An electromagnet switches the load current on and off via the contacts, for which its armature is coupled via a magnetic energy store to a longitudinally movable transmission element, which thus executes a movement in the longitudinal direction when the electromagnet is energized and in the process fastens those to a movable contact bridge movable contacts from fixed contacts.
  • Magnetic switch on the spring force accumulator in such a way that it suddenly accelerates the transmission element and tears open the contacts to avoid welding.
  • the power transmission of the electromagnet can also be carried out by a push rod which is guided in a transmission element actuated by the magnetic switch.
  • the object of the invention is to improve the switching device of the type mentioned above in such a way that welding of the contacts is avoided by avoiding overcurrent-dependent arcing.
  • the transmission member is designed as a contact bridge support with a window in which the movable contact element is received, that the contact bridge support is coupled to the armature without the intermediary of levers, that the movable iron core is the first drive device is fastened to the contact bridge carrier and that a force proportional to the load current acts on the movable iron core, which holds the contacts over the contact bridge carrier.
  • first and second drive devices are arranged coaxially to one another and have a common line of action of force which is aligned with the axis of symmetry of the contact bridge carrier. This has the advantage that only longitudinal forces become effective and the forces can be fully deployed without loss, ie, for example, friction losses, which usually occur when using deflection levers, are avoided.
  • the contact bridge support comprises two parts that can move relative to one another in one direction, this enables the contact bridge support to be shortened when the magnetic circuit of the second drive device is closed due to the force of the first drive device in such a way that the pressure of the movable contacts on the fixed contacts is increased.
  • the parts of the contact carrier are a contact carrier plate attached to the armature of the second drive device and a contact carrier dome coupled to the latter via a spring.
  • the shortening of the contact bridge carrier described above is easily achieved in this way.
  • the contact carrier dome is provided with the window in which the movable contact element is biased in the direction of the fixed contacts by a contact spring and if a pressure piece is provided which increases the spring travel by which the spring
  • Compression can be shortened.
  • the result of this design is that the additional force of the first drive device is effective when overcurrents occur directly via the contact carrier dome and the pressure piece for pressing the movable contacts onto the fixed contacts.
  • the force of the contact spring is no longer decisive as when switching on by the first drive device.
  • a further advantageous solution is provided if the contact bridge support and the movable iron core can be moved relative to one another in the direction of movement and if the movable iron core is provided with a plunger which is guided through the contour of the contact bridge carrier is guided and tears open the contacts over the contact element in the event of overcurrents.
  • This embodiment can be implemented in a simple manner and means a modification of the solution concept described above. While this freedom from sweat is achieved by means of a dynamic increase in contact force, in the present solution the absence of sweat is brought about by opening the movable contact element.
  • FIG. 2 shows the electrical switching device according to FIG.
  • FIG 3 shows an electrical switching device with no sweat by opening a contact bridge.
  • FIG. 1 shows an electrical switching device 1 according to a first embodiment with a contact device 3, 4, 5 in an arc chamber 2, a main magnet system 16 actuating the contact device 3, 4, 5, and one between the contact device 3, 4, 5 and the main magnet system 16 arranged auxiliary magnet system 22, 23, 24.
  • the main magnet system 16 and the auxiliary magnet system 22, 23, 24 are designed as electromagnetic drive devices.
  • the auxiliary magnet system 22, 23, 24 is advantageously arranged in the line of action of the main magnet system 16, so that, in contrast to the previous technology, which works with reversing levers, both have their effect without delay without the intermediary of reversing levers.
  • the elimination of bellcranks also means a reduction in components, which is usually the goal.
  • 1 shows the system for one phase; the structure is essentially the same for the other phases, so that the description for this one phase also applies to the other phases.
  • the contact device 3, 4, 5 comprises a movable contact bridge 3 as a movable contact element, each with a movable contact 4 at opposite end regions of the contact bridge 3.
  • the movable contacts 4 are arranged opposite a pair of fixed contacts 5.
  • the fixed contacts 5 are each connected to a contact element 6 which is fastened to a housing shoulder 7 inside an upper housing half 8.
  • the contact bridge 3 is inserted into a window 9 of a rod-shaped, two-part contact bridge carrier, which essentially consists of a contact carrier dome 10 and a contact carrier plate 11.
  • the contact carrier dome 10 is held at the top in FIG. 1 via a spiral spring 12 as the main contact spring, the contact carrier dome 10 and the contact bridge
  • the auxiliary magnet system comprises a fixed iron core, which is formed by two U-shaped iron sheets 22, a coil 23 and an armature 24 as a movable iron core.
  • the main magnet system 16 serving as the operating and actuating mechanism is located in a lower housing half 15 as shown in FIG. 1. It is designed as an electromagnet which essentially comprises a fixed iron core 17, a movable armature 18 and a coil or winding (not shown here). tion comprises, which can be acted upon by a control circuit with current to actuate the switching device.
  • FIGS 1 and 2 shows the switching device 1 according to the invention in the switched-on state, i.e. with current supply.
  • the function of the switching device 1 is explained below with reference to FIGS 1 and 2.
  • the contact carrier dome 10 presses the contact bridge 3 directly downward via the pressure piece 26, since the contact spring 12 - as mentioned above - is already almost compressed around the air gap 27.
  • the result of this is that the additional force of the auxiliary magnet system 22, 23, 24 generated when overcurrents occur is transmitted directly to the contact point between the movable 4 and the fixed contacts 5, while otherwise only the substantially small one with normal load currents - re contact force effective through the contact spring 12. So that the described additional force of the auxiliary magnet system 22, 23, 24 can fully develop, the contact carrier dome 10 can be displaced relative to the contact carrier plate 11 with the interaction of the spring 21.
  • the pressure piece 26 could also be integrally formed on the upper edge surface 28 of the window 9 in the contact carrier dome 10 and accordingly the spiral spring 12 could survive the above-mentioned air gap 27 at the lower end of the pressure piece 26 without the mode of operation being affected would change in principle.
  • FIG. 3 shows a switching device 1 according to a second embodiment in the switched-on state. This largely corresponds to the first embodiment of the switching device 1 according to FIGS. 1 and 2. In this respect, a description of the matching components is dispensed with and these are provided with the same reference numerals as in FIGS. 1 and 2.
  • the essential modification in the second embodiment relates to the construction of the contact bridge support.
  • This also consists of a contact carrier plate 11 and a tubular contact carrier dome 10 with a window 9 for receiving the contact spring 12.
  • the armature 24 of the auxiliary magnet system is mounted movably in the cylindrical cavity 19 of the contact carrier dome 10 and is provided at its upper end with a plunger 29 or striker pin which can be moved into the window 9 when triggered by an overcurrent or short-circuit current.
  • the plunger 29 there is a back pressure spring 30 which is supported on one side on a shoulder 31 in the cylindrical cavity 19 and on the other hand acts on the armature 24.
  • the desired freedom from sweat is achieved in the solution according to the second embodiment by opening the movable contact bridge 3 in the event of an overcurrent or short circuit.
  • the function of the plunger 29 is corresponding, as a result of overcurrents caused by the force of the auxiliary magnet system
  • the contacts 4, 5 are likewise torn open via the plunger 29 of the auxiliary magnet system 22, 23, 24 with the result that arcs are again drawn. These are attracted to the arc extinguishing plates 14, so that the arc resistance increases and the short-circuit current is thereby limited.
  • the short-circuit current is subsequently interrupted by a breaker or disconnector, not shown.

Landscapes

  • Breakers (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Electromagnets (AREA)

Abstract

L'invention concerne vise à éviter que les contacts mobiles (4) et les contacts fixes (5) d'un appareil de commutation ne soient soudés. A cet effet, on utilise un système magnétique auxiliaire (22, 23, 24) placé dans le trajet du courant principal, qui produit une force de pression de contact correspondant au courant d'excitation, de manière à éviter les phénomènes d'arc électrique entre les contacts (4, 5), en cas de courant de surcharge et de courts-circuits. A cet effet, le noyau de fer doux (24) mobile du système magnétique auxiliaire est connecté au support de ponts de contacts (10, 11) par le biais duquel s'effectuent la mise en circuit et hors circuit des contacts (4, 5).
EP97914045A 1996-01-22 1997-01-09 Appareil de commutation electrique Expired - Lifetime EP0876671B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19602118 1996-01-22
DE19602118A DE19602118C2 (de) 1996-01-22 1996-01-22 Elektrisches Schaltgerät
PCT/DE1997/000023 WO1997027602A1 (fr) 1996-01-22 1997-01-09 Appareil de commutation electrique

Publications (2)

Publication Number Publication Date
EP0876671A1 true EP0876671A1 (fr) 1998-11-11
EP0876671B1 EP0876671B1 (fr) 1999-08-04

Family

ID=7783336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97914045A Expired - Lifetime EP0876671B1 (fr) 1996-01-22 1997-01-09 Appareil de commutation electrique

Country Status (6)

Country Link
US (1) US5986528A (fr)
EP (1) EP0876671B1 (fr)
JP (1) JP3805377B2 (fr)
CN (1) CN1063868C (fr)
DE (2) DE19602118C2 (fr)
WO (1) WO1997027602A1 (fr)

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DE19617136C2 (de) * 1996-04-29 2000-05-11 Siemens Ag Schaltgerät
US6937593B1 (en) * 1997-12-31 2005-08-30 Mci Communications Corporation System and method for servicing calls originating via the internet
DE19809205A1 (de) * 1998-03-04 1999-04-15 Siemens Ag Magnetsystem mit Überstromauslösung
JP3492228B2 (ja) * 1999-02-09 2004-02-03 株式会社テクノ高槻 鉄心および該鉄心を用いる電磁駆動機構
DE19951116A1 (de) * 1999-10-23 2001-04-26 Bosch Gmbh Robert Relais, insbesondere für eine Startvorrichtung
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DE10011985A1 (de) * 2000-03-11 2001-09-13 Moeller Gmbh Kontaktsystem für ein Niederspannungsschaltgerät
TWM261629U (en) * 2004-08-27 2005-04-11 Tricore Corp Improved return structure of core bar for electromagnetic valve
DE102004062266A1 (de) * 2004-12-23 2006-07-13 Siemens Ag Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes
DE102004062267A1 (de) * 2004-12-23 2006-07-13 Siemens Ag Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes
US7570140B2 (en) * 2006-03-02 2009-08-04 Eaton Corporation Magnetic trip mechanism including a plunger member engaging a support structure, and circuit breaker including the same
DE102006034818B3 (de) * 2006-07-27 2008-01-03 Moeller Gmbh Kontaktsystem einer elektrischen Schaltanordnung
CN101512707A (zh) * 2006-09-21 2009-08-19 西门子公司 用于对至少两种工作状态进行操作的开关设备单元
DE112007003445A5 (de) * 2007-02-05 2010-01-21 Siemens Aktiengesellschaft Elektromechanisches Schaltgerät und Verwendung einer Zwischenlage in einem elektromechanischen Schaltgerät
US7669352B2 (en) * 2007-03-30 2010-03-02 Jerry Stefani Interchangeable component shoe system
EP2260498A4 (fr) * 2008-02-29 2014-08-13 Siemens Ag Dispositif de commutation, procédé d'assemblage ou de fonctionnement d'un tel dispositif de commutation, et dispositif électrique comprenant ledit dispositif de commutation
CN101789332B (zh) * 2010-02-10 2012-10-31 湖北盛佳电器设备有限公司 具有机械式短路自锁功能的交流接触器
JP4914931B2 (ja) * 2010-09-13 2012-04-11 株式会社ｏｎｅＡ ピッキング作業用端末
DE102011052003B4 (de) * 2011-07-20 2022-06-15 Te Connectivity Germany Gmbh Schaltvorrichtung mit Überlastsicherungsvorrichtung und einem ersten und einem zweiten Betätigungsorgan
JP5793048B2 (ja) * 2011-10-07 2015-10-14 富士電機株式会社 電磁接触器
CN103177884B (zh) * 2011-12-26 2016-09-14 上海电科电器科技有限公司 低压电器的触头结构
DE102012106108A1 (de) * 2012-07-06 2014-01-09 Tyco Electronics Amp Gmbh Elektrische Schaltvorrichtung und Verfahren zum Schalten selbiger mit Kontakttrennung im Sicherungsfall
CN103337414A (zh) * 2013-07-16 2013-10-02 孟庆义 自动断电双向定位节能继电器
JP6300157B2 (ja) * 2013-08-02 2018-03-28 パナソニックＩｐマネジメント株式会社 電磁継電器
FR3011673B1 (fr) * 2013-10-08 2015-12-11 Schneider Electric Ind Sas Dispositif de commutation et procede de detection d'un defaut d'un tel dispositif de commutation
CN103683418B (zh) * 2013-12-10 2016-04-20 广州供电局有限公司 防起火花的充电装置
JP6551339B2 (ja) * 2015-11-17 2019-07-31 アンデン株式会社 電磁継電器
CN105428157A (zh) * 2015-11-20 2016-03-23 成都迅德科技有限公司 一种无弧接触器
EP3511969B1 (fr) * 2018-01-16 2020-08-05 Microelettrica Scientifica S.p.A. Dispositif de contact
JP2020004848A (ja) * 2018-06-28 2020-01-09 日本電産トーソク株式会社 ソレノイド装置
JP6919639B2 (ja) * 2018-10-02 2021-08-18 株式会社デンソー ソレノイド
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Also Published As

Publication number Publication date
EP0876671B1 (fr) 1999-08-04
JP2000503459A (ja) 2000-03-21
US5986528A (en) 1999-11-16
DE59700308D1 (de) 1999-09-09
CN1063868C (zh) 2001-03-28
CN1207201A (zh) 1999-02-03
JP3805377B2 (ja) 2006-08-02
DE19602118C2 (de) 1999-12-30
WO1997027602A1 (fr) 1997-07-31
DE19602118A1 (de) 1997-07-24

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