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EP1269597A1 - Procede de commutation destine a un appareil de commutation electromagnetique, appareil de commutation electromagnetique correspondant - Google Patents

Procede de commutation destine a un appareil de commutation electromagnetique, appareil de commutation electromagnetique correspondant

Info

Publication number
EP1269597A1
EP1269597A1 EP01927626A EP01927626A EP1269597A1 EP 1269597 A1 EP1269597 A1 EP 1269597A1 EP 01927626 A EP01927626 A EP 01927626A EP 01927626 A EP01927626 A EP 01927626A EP 1269597 A1 EP1269597 A1 EP 1269597A1
Authority
EP
European Patent Office
Prior art keywords
contact
current
load
limit value
circuit
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Withdrawn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
EP01927626A
Other languages
German (de)
English (en)
Inventor
Georg Bollinger
Peter Donhauser
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 EP1269597A1 publication Critical patent/EP1269597A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
    • H01H81/04—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electromagnetically operated
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
    • 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
    • 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
    • H01H73/045—Bridging contacts

Definitions

  • the present invention relates to a switching method for an electromagnetic switching device, in particular a contactor, with at least one load contact which has a current carrying capacity, the load contact being closed,
  • the circuit being opened when a current flowing through the load contact exceeds a current limit value, and an electromagnetic switching device corresponding therewith.
  • Switching methods and switching devices of this type are known. They are used, for example, in a series connection of a contactor with an upstream or downstream circuit breaker or in the form of a so-called sweat-free contactor. In both cases, opening the circuit serves to protect the contactor from short-circuits.
  • an extremely high current surge flows briefly when the circuit is closed.
  • the current surge can be 20 to 30 times the continuous current for transformers, and even 50 to 100 times the continuous current for capacitors.
  • the switchgear must always be dimensioned so that it can switch even this high surge.
  • the switching device must therefore be considerably oversized for switching transformers or capacitors compared to the continuous current to be carried.
  • the object of the present invention is a switching method for an electromagnetic switching device and to specify the corresponding electromagnetic switching device in which the switching device can be dimensioned smaller for the same continuous current to be conducted.
  • the object is achieved in that the circuit is closed again automatically when the current flowing through the load contact falls below the current limit value again due to the opening of the circuit, and in that the current limit value is at most as large as the current carrying capacity.
  • the circuit can be opened in a particularly simple manner when the current limit value is exceeded. If, for closing the load contact, a contact element pair is electrically conductively connected by a contact bridge, which is acted upon by a pressure spring with a pressure force directed at the contact element pair, and the electromagnetic drive acts directly on the contact bridge when the current limit value is exceeded and lifts it from the contact element pair, the load current monitoring element speaks particularly quickly.
  • a contactor has a housing 1 as an example of an electromagnetic switching device.
  • a load contact 2 is arranged in the housing 1.
  • the load contact 2 has a pair of contact elements 3 and a contact bridge 4.
  • the pair of contact elements 3 is connected on the one hand to a load voltage U and on the other hand to a load 6 via a load current monitoring element 5.
  • the load 6 is in turn connected to ground M.
  • a switching coil 7 is acted upon by a switching current IS.
  • the switching coil 7 attracts a main armature 8.
  • a contact carrier 9 is connected to the main anchor 8 and acts on the contact bridge 4 via a pressure spring 10 with a pressure force which is directed onto the pair of contact elements 3.
  • the contact element pair 3 is thus connected in an electrically conductive manner via the contact bridge 4.
  • the circuit is closed from the load voltage U via the load 6 to ground M.
  • a load current IL flows through the load contact 2, the load current monitoring element 5 and the load 6.
  • the Las' current IL causes a contact pressure that is dependent on the load current.
  • the load current IL counteracts the penetration force.
  • the push-through force thus sets a maximum
  • a very high inrush current can flow in the short term when the load contact 2 ⁇ is closed for the first time.
  • the switching current surge may possibly exceed the current carrying capacity of load contact 2.
  • the load current monitoring element 5 is provided to protect the load contact 2. It is connected in series with the load contact 2 and is designed as an electromagnetic drive. If the load current IL exceeds a current limit value which is at most as large as the current carrying capacity of the load contact 2, the load current monitoring element 5 is triggered. It therefore attracts an auxiliary anchor 11. As a result, a plunger 12 and a
  • the entire switching process above takes place without intervention on the control side of the contactor.
  • the switching coil 7 is therefore still subjected to the switching current IS despite the opening of the load contact 2, so that the main armature 8 and the contact carrier 9 remain in the switching position "contactor on".
  • the contactor described above can in principle be used for all loads 6.
  • the application is particularly advantageous if the load 6 is designed as a transformer or as a capacitor, since particularly high current surges occur in these two cases.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Relay Circuits (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne un appareil de commutation électromagnétique protégé lors de la connexion d'une charge (6) à une tension d'alimentation (U), grâce à la surveillance d'un courant (IL) traversant le contact de charge (2). Lorsque le courant (IL) dépasse une valeur seuil d'intensité qui est en dessous de l'intensité maximale admissible par le contact de charge (2), le circuit électrique est interrompu, puis, après diminution du courant (IL) traversant le contact de charge (2), est automatiquement refermé.
EP01927626A 2000-04-07 2001-03-30 Procede de commutation destine a un appareil de commutation electromagnetique, appareil de commutation electromagnetique correspondant Withdrawn EP1269597A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10017375 2000-04-07
DE10017375 2000-04-07
PCT/DE2001/001220 WO2001078210A1 (fr) 2000-04-07 2001-03-30 Procede de commutation destine a un appareil de commutation electromagnetique, appareil de commutation electromagnetique correspondant

Publications (1)

Publication Number Publication Date
EP1269597A1 true EP1269597A1 (fr) 2003-01-02

Family

ID=7637956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01927626A Withdrawn EP1269597A1 (fr) 2000-04-07 2001-03-30 Procede de commutation destine a un appareil de commutation electromagnetique, appareil de commutation electromagnetique correspondant

Country Status (4)

Country Link
US (1) US6833777B2 (fr)
EP (1) EP1269597A1 (fr)
CN (1) CN1270422C (fr)
WO (1) WO2001078210A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062267A1 (de) * 2004-12-23 2006-07-13 Siemens Ag Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes
DE102004062270B4 (de) * 2004-12-23 2012-08-30 Siemens Ag Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes sowie Schaltgerät
DE102006055007A1 (de) * 2006-11-22 2008-05-29 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung
DE102008016036A1 (de) * 2008-03-28 2009-10-01 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung
EP2302657A1 (fr) * 2009-09-23 2011-03-30 ABB Schweiz AG Système de limitation de courant
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
CN102133867A (zh) * 2011-03-31 2011-07-27 韦良东 一种汽车碰撞进水时电路自动保护装置
DE102011122439A1 (de) * 2011-12-24 2013-06-27 Daimler Ag Vorrichtung und Verfahren zum Schalten elektrischer Lastkreise
US9520713B2 (en) * 2013-08-22 2016-12-13 Varian Semiconductor Equipment Associates, Inc. Fast switch fault current limiter
US9911562B2 (en) * 2014-05-14 2018-03-06 Abb Schweiz Ag Thomson coil based actuator
CN110517936B (zh) * 2019-09-06 2021-07-02 绍兴阔源机械科技有限公司 一种快速响应式交流熔断器
CN111152692B (zh) * 2019-12-30 2021-06-04 东风汽车有限公司 一种座椅侧面碰撞断电机构及汽车电动座椅

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE299932C (fr) 1915-02-19
FR2516304A1 (fr) * 1981-11-09 1983-05-13 Telemecanique Electrique Interrupteur a commande mecanique et ouverture automatique
JP2812810B2 (ja) 1990-02-14 1998-10-22 三菱電機株式会社 開閉器
FR2669463B1 (fr) * 1990-11-15 1995-05-12 Telemecanique Interrupteur de protection.
DE4330325C2 (de) * 1993-09-08 2002-03-14 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE4337435A1 (de) * 1993-11-03 1995-05-04 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil, insbesondere für eine hydraulische Bremsanlage
DE19617136C2 (de) * 1996-04-29 2000-05-11 Siemens Ag Schaltgerät
DE19809205A1 (de) 1998-03-04 1999-04-15 Siemens Ag Magnetsystem mit Überstromauslösung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0178210A1 *

Also Published As

Publication number Publication date
WO2001078210A1 (fr) 2001-10-18
CN1270422C (zh) 2006-08-16
US20030052756A1 (en) 2003-03-20
CN1408137A (zh) 2003-04-02
US6833777B2 (en) 2004-12-21

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