EP1671344A1 - Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe - Google Patents

Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe

Info

Publication number
EP1671344A1
EP1671344A1 EP04765135A EP04765135A EP1671344A1 EP 1671344 A1 EP1671344 A1 EP 1671344A1 EP 04765135 A EP04765135 A EP 04765135A EP 04765135 A EP04765135 A EP 04765135A EP 1671344 A1 EP1671344 A1 EP 1671344A1
Authority
EP
European Patent Office
Prior art keywords
contact
force
switching device
switching
magnetic
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
EP04765135A
Other languages
German (de)
English (en)
Other versions
EP1671344B1 (fr
Inventor
Ludwig Niebler
Fritz Pohl
Alf Wabner
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 EP1671344A1 publication Critical patent/EP1671344A1/fr
Application granted granted Critical
Publication of EP1671344B1 publication Critical patent/EP1671344B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/101—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening
    • 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

Definitions

  • the invention relates to a method for increasing the current carrying capacity and for accelerating the dynamic contact opening of circuit breakers according to the preamble of claim 1.
  • the invention relates to an associated switching device with at least one fixed contact and at least one moving contact and with a track and associated splitters.
  • Such switching devices generally have a translational contact opening movement, the contacts being arranged on a contact bridge and a bridge carrier and a contact force spring being present for the translational movement.
  • switching devices can have a rotary contact opening movement, to which the invention also relates.
  • Electrical switching devices for the protection of electrical systems, but also for the operation of electrical consumers, are required to carry electrical currents up to a predetermined level without interference, and higher currents, e.g. Short-circuit currents to switch off in the shortest possible time.
  • they have a switching device drive (mechanical switch lock and / or magnetic drive), which closes the contacts with a specified contact force, and tripping devices (e.g. n-releases or electronically operated actuators), which allow the switching contacts to be opened quickly and therefore the current to be quickly set up Cause arc tension.
  • the current path between the moving and fixed contacts is guided in the form of a tight loop and / or the magnetic field around the current-carrying moving contact is distorted by ferromagnetic arrangements (e.g. slot motor) so that strong Lorenz forces act.
  • ferromagnetic arrangements e.g. slot motor
  • the method according to the invention advantageously uses u-shaped yokes made of ferromagnetic material, preferably made of ordinary steel sheet, for magnetic force amplification.
  • the magnetic force on the moving contact is specifically changed in sign when there is an increase from small currents (rated operation) to very high currents (short-circuit operation). Specifically, this means that a contact-strengthening effect is generated for small currents and a contact-force-weakening effect is generated for high currents, which results in a dynamic opening force.
  • a change in the sign or an almost balanced magnetic force curve can be set for small currents.
  • a first, U-shaped plate for generating the magnetic closing force and a second, U-shaped plate for generating the magnetic opening force are used as magnetic yokes, which are suitably positioned on the contact arrangement.
  • FIG. 1 shows a switching device with a switching bridge and associated drive
  • FIG. 2 shows a detail from FIG. 1 to illustrate the two iron yokes assigned to the switching bridge
  • FIG. 3 shows in perspective the respective orientation of the two U-shaped iron yokes
  • FIG. 4 shows a contact arrangement with a switching bridge and partial yokes
  • Figure 5 shows a contact arrangement with attached partial yokes and two sheets assigned to the partial yokes.
  • the contactor consists essentially of a switching chamber 1 with the switching components contained therein and a magnetic drive 10, with the electromagnetically activated mechanical movement of the switching contacts.
  • fixed contacts 3a and 3b are arranged in the switching chamber on fixed contact carriers 2a and 2b and there are associated moving contacts 5a and 5b on a movable switching bridge 4.
  • the contact arrangement with the opposing contacts 3a, 5a and 3b, 5b are assigned in a known manner extinguishing plates 9a and 9b, which are usually part of extinguishing plate arrangements with a running or guide rail 32.
  • the movable switching bridge 4 is coupled via a contact force spring 7 so as to be relatively movable with a bridge support 8 which is moved with the armature 13 by the magnetic drive 10 into the switch-on or switch-off position.
  • relatively movable elements can be contained in the bridge girder, which act on the switching bridge via actuators and can trigger a bridge movement.
  • the magnetic drive 10 consists in detail of a magnetic yoke 11 with a magnetic coil 12 and a magnetic armature 13 assigned to the yoke, which is connected to the bridge girder 8 via a carrier plate 14.
  • An opening spring 15 acts on the magnetic yoke 11 and ensures the open position of the switching bridges when the magnetic drive 10 is switched off.
  • ferromagnetic parts are present for controlling the contact force, in particular in the switching chamber, two iron yokes 20 and 30, the function of which will be discussed in more detail below. Only the iron yoke 30, which is connected to the running or guide rail 32, can be seen in FIG.
  • FIG. 3 shows the geometrical differences of the two yokes that are decisive for magnetization.
  • the geometry and positioning of the U-shaped plate 20 which generates the contact force reacts more sensitively to the electrical current in the switching bridge 4 than the U-shaped plate 30 which generates the opening force. Due to its compact dimensions, the U-shaped sheet 20 is magnetized more quickly than the U-shaped sheet 30 and, due to its small sheet thickness, goes into magnetic saturation at an early stage. In contrast, the entire length of the opening-force-generating U-shaped sheet metal 30 covers the movable contact or the movable switching bridge 4 with contacts 5a and 5b, and has a larger internal width and a larger sheet thickness. In comparison to the contact-force-generating U-shaped sheet 20, its magnetic saturation is therefore only achieved with higher electrical currents.
  • the contact-force-generating U-shaped plate 20 is fastened either to a switch lock component or to the switch housing.
  • the contact-force-generating U-shaped plate 20 is fastened to the bridge support 8 and engages around the switching bridge 4, the bridge support coupling the switching bridge in accordance with FIG. 1 with the drive 10 shown there.
  • the opening-force-generating U-shaped sheet metal 30 is expediently fastened to the switching chamber 1, to the housing or to a resting mechanical component located in the housing.
  • the switching bridge carries out a translatory movement, but a rotational movement is also possible if the switching device is designed accordingly.
  • a U-shaped plate 20 or 20 ⁇ and a U-shaped plate 30 or 30 are assigned to the switching bridge on both sides of the axis of rotation, corresponding to a point-symmetrical arrangement.
  • the two U-shaped sheets 30, 30 ⁇ are fixed to the housing or with one connected mechanical component in the housing connected.
  • the two U-shaped plates 20, 20 can also be firmly connected to the housing, or with a switching bridge support which is in positive engagement with the switching device drive (mechanical and / or electromagnetic drive) and rotates with the switching bridge in the switched-off position during the switching-off process.
  • the u-shaped sheets 20 or 20 and 30 or 30 ⁇ are positioned at a predetermined distance from one another so that a magnetic short circuit between the u-shaped sheet 20 and the u-sheet 20 x or between the u-shaped sheet 30 and the U-shaped sheet 30 is avoided.
  • the clear width of the respective u-gap is specified as the distance.
  • the moving contact or the movable contact bridge moves out of the gap of the U-shaped sheet which generates contact force and dips into the gap of the U-sheet 30 which generates opening force.
  • the force effect of the first u-plate 20 disappears and the opening force of the second u-plate 30 acts without loss.
  • the magnetic flux striking the moving contact can be regarded as a flux difference ⁇ 2 - ⁇ i of the second and first u-plate become. Due to the different sheet thicknesses, the saturation flows will occur in relation to the sheet thickness. If the sheet thickness of the contact-force-generating u-shaped sheet 20 is approximately (10 to 20%) that of the opening-force-generating u-shaped sheet 30, the resulting magnetic field for the transition region becomes approximately 80 to 90% of the field portion of the second u-sheet 30 reduced. In the same way, the resulting magnetic force that contributes to the opening of the contact is reduced.
  • the second U-shaped plate 30 can be part of a running or guide rail 32 which is usually present in such switching devices.
  • the table below shows a dimensioning example for the U-shaped sheets 20 and 30. The dimensions can vary within a predetermined range, whereby the mutual coordination is essential.
  • the contact force-generating component is only slightly larger than the opening force-generating component until the magnetic saturation of the first u-plate 20 is reached.
  • the contact force-generating and the opening force-generating magnetic force components can be set over a larger range.
  • two small yokes 21 and 22 are attached to the side of the switching bridge support 8 on a stationary component of the switching chamber 1 or the switch housing in a force-fitting manner. These two yokes are each positioned between the switching bridge support 8 and the switching contacts 3a, 5a and 3b, 5b. Due to their predetermined distance in the millimeter or submillimeter range from the switching bridge carrier 8, the two yokes 21 and 22 do not hinder the translational movement of the switching bridge carrier 8.
  • the two yokes 21 and 22 are to be positioned such that in the closed position of the switching contacts 3a, 3b and 5a, 5b the moving contact carrier 4 is completely in the u-column of the two yokes 21 and 22 or partially submerged.
  • the yokes 21 and 22 are appropriately attached to a stationary component of the switching chamber 1 or the housing.
  • the movable contact carrier In the closed position of the switching contacts 3a, 5a or 3b, 5b, the movable contact carrier has a smallest, predetermined distance from the two sheets 25, 26, i.e. a distance in the submillimeter to millimeter range.
  • the movable contact carrier On the movable contact carrier two U-shaped plates 28, 29 are attached, each with their side legs pointing to one of the two plates 25, 26, so that two magnetic circles are formed, which are magnetized by the electric current in the movable contact carrier, thereby creating a magnetic Holding force is generated on the movable contact carrier.
  • the yokes or u-shaped sheets 20 or 21, 22 or the sheets 25, 26 with associated u-shaped sheets 28, 29 each consist of ferromagnetic material and generate a magnetic closing force that is directed opposite the large yoke 30 made of ferromagnetic material the switching bridge 4.
  • the invention described with reference to the individual figures is implemented in particular in a switching device with translatory movement of the moving contact. As in the example in FIG. 1, this can be a contactor. However, the invention can also be implemented without limitation for circuit breakers with a mechanical or with a mechanical / electrical drive.
  • the invention can also be applied to a switching device with a rotary switching movement, in which case the first yoke or U-shaped plate 20 is the movable rotary contact of the contact piece grips the facing front of the contact carrier, while the second yoke or U-shaped plate 30 encompasses the opening area of the rotary contact on the back of the contact carrier.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un interrupteur de puissance comportant un tracé conducteur, au moins un contact mobile et au moins un contact fixe, le tracé conducteur formant une boucle étroite entre le contact mobile et le contact fixe. Pour permettre d'augmenter l'intensité admissible, une force de fermeture de contact dynamique et une force d'ouverture de contact dynamique sont produites par le courant électrique. A cet effet, on change le signe de polarité de la force magnétique appliquée au contact mobile lors du passage d'intensités faibles à des intensités très élevées, ce qui présente des avantages lors du passage du mode nominal au mode court-circuit. L'invention concerne également un dispositif correspondant, dans lequel des éléments ferromagnétiques (20, 30; 21, 22; 25, 26, 28, 29) sont associés au pont de commutation (4) comportant les contacts mobiles (5a, 5b) et sont dimensionnés de manière appropriée pour permettre l'obtention de ces forces dynamiques.
EP04765135A 2003-09-17 2004-09-13 Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe Expired - Fee Related EP1671344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003143005 DE10343005B4 (de) 2003-09-17 2003-09-17 Schaltgerät sowie Verfahren zu dessen Herstellung
PCT/EP2004/010213 WO2005034162A1 (fr) 2003-09-17 2004-09-13 Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe

Publications (2)

Publication Number Publication Date
EP1671344A1 true EP1671344A1 (fr) 2006-06-21
EP1671344B1 EP1671344B1 (fr) 2007-02-28

Family

ID=34398776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04765135A Expired - Fee Related EP1671344B1 (fr) 2003-09-17 2004-09-13 Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe

Country Status (5)

Country Link
EP (1) EP1671344B1 (fr)
CN (1) CN100481298C (fr)
DE (2) DE10343005B4 (fr)
HK (1) HK1094089A1 (fr)
WO (1) WO2005034162A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2605265A1 (fr) * 2010-08-12 2013-06-19 Fuji Electric Fa Components & Systems Co., Ltd. Coupe circuit

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBG20060053A1 (it) 2006-10-13 2008-04-14 Abb Service Srl Dispositivo di bassa tensione con equipaggio mobile ad alta tenuta elettrodinamica
FR2953979B1 (fr) * 2009-12-11 2012-10-26 Schneider Electric Ind Sas Dispositif de coupure avec circuit magnetique de renforcement
DE102013214642A1 (de) * 2013-07-26 2015-01-29 Siemens Aktiengesellschaft Schaltgerät
DE102014117491A1 (de) * 2014-11-28 2016-06-02 Eaton Electrical Ip Gmbh & Co. Kg Schaltgerät mit einem Antrieb zum betriebsmäßigen Schalten und mit einem Schnellauslöser zum Trennen eines Strompfads in dem Schaltgerät
JP6064289B2 (ja) * 2015-10-08 2017-01-25 パナソニックＩｐマネジメント株式会社 接点装置
DE102016217434B4 (de) 2016-09-13 2023-11-16 Siemens Aktiengesellschaft Schütz oder Kompaktmotorabzweig mit einer elektromagnetischen Kontaktlastunterstützung
CN114242532B (zh) * 2021-12-08 2023-08-29 深圳智电时代科技有限公司 一种电磁式开关模组

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3887888A (en) * 1973-04-04 1975-06-03 Arrow Hart Inc High current switch
US4013984A (en) * 1975-08-22 1977-03-22 Westinghouse Electric Corporation Current limiting circuit breaker
FR2483683A1 (fr) * 1980-05-30 1981-12-04 Telemecanique Electrique Contacteur ayant des proprietes de disjoncteur
JPS60117546U (ja) * 1984-01-17 1985-08-08 三菱電機株式会社 電磁接触器
DE4216080A1 (de) * 1992-05-15 1993-11-18 Siemens Ag Kontaktfedersatz zum Schalten hoher elektrischer Ströme
DE19846317C2 (de) * 1998-03-25 2002-10-24 Siegenia Frank Kg Beschlag für Fenster oder Türen
DE19912713A1 (de) * 1999-03-20 2000-09-21 Abb Research Ltd Stromleitersperreinrichtung
FR2829869B1 (fr) * 2001-09-20 2003-10-31 Schneider Electric Ind Sa Appareil electrique interrupteur muni d'un dispositif de commutation de contact

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005034162A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2605265A1 (fr) * 2010-08-12 2013-06-19 Fuji Electric Fa Components & Systems Co., Ltd. Coupe circuit
EP2605265A4 (fr) * 2010-08-12 2014-09-10 Fuji Elec Fa Components & Sys Coupe circuit

Also Published As

Publication number Publication date
CN1849686A (zh) 2006-10-18
HK1094089A1 (en) 2007-03-16
EP1671344B1 (fr) 2007-02-28
DE10343005B4 (de) 2005-10-27
CN100481298C (zh) 2009-04-22
DE502004003078D1 (de) 2007-04-12
DE10343005A1 (de) 2005-05-19
WO2005034162A1 (fr) 2005-04-14

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