EP1820199A1 - Circuit a resistance dependant de la temperature permettant de supprimer un arc electrique - Google Patents

Circuit a resistance dependant de la temperature permettant de supprimer un arc electrique

Info

Publication number
EP1820199A1
EP1820199A1 EP05819352A EP05819352A EP1820199A1 EP 1820199 A1 EP1820199 A1 EP 1820199A1 EP 05819352 A EP05819352 A EP 05819352A EP 05819352 A EP05819352 A EP 05819352A EP 1820199 A1 EP1820199 A1 EP 1820199A1
Authority
EP
European Patent Office
Prior art keywords
contact
arc
switching device
resistance
resistor
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Withdrawn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
EP05819352A
Other languages
German (de)
English (en)
Inventor
Michael Hahn
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 EP1820199A1 publication Critical patent/EP1820199A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01H9/42—Impedances connected with contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/161—Variable impedances
    • H01H2033/163—Variable impedances using PTC elements

Definitions

  • the present invention relates to a switching device with a fixed contact and a movable contact, between which an arc can occur when switching off the switching device.
  • Arc chambers in low-voltage switchgear have a limited extinguishing effect. This depends on a given switching device usually only on the height of the arc voltage and the current. The extinguishing effect is particularly critical when used in the upper voltage levels of the low voltage range (690 V, 1000 V, IT networks, etc.). Due to the increasingly limited installation space of low-voltage switchgear, the requirements for the extinguishing capability of such systems are increasing.
  • European Patent EP 1 192 628 B1 furthermore discloses a switch contact arrangement of a low-voltage
  • Circuit breaker with a fixed and a bewegba ⁇ ren contact group each consisting of a main contact, an intermediate contact, a breakaway contact and a Lichtbo- genhorn known.
  • the object of the present invention is to erase arcs in switching devices safer.
  • this object is achieved by a switching ⁇ device with a fixed contact and a movable contact or contact package and a resistance device whose resistance increases with increasing temperature and which is connected to one of the two contacts, so that in the case of an arc, the current from the movable Contact via the resistance device to the fixed contact or vice versa runs.
  • the resistance of the resistance device increases due to the heat-generating current flow. This increases the voltage drop across the Wi ⁇ resistance too and does the voltage stress on the switching path from. The arc is thus easier to extinguish.
  • the resistance device is firmly connected to the fixed contact.
  • the movable contact without Be made effort for connection technology, so that its life increases.
  • the resistance device can be designed as an arcing stub. This makes it possible to dispense with a resistor as an additional component, since the arc guide is usually present in a switching device anyway.
  • the resistance device can also be arranged between an arc guide and the fixed contact.
  • An advantage of this embodiment is that the material of the resistance device and that of the arcing stirrer can each be selected optimally for the corresponding function.
  • FIG. 1 shows a sketch of a section of a switching device according to the invention according to a first embodiment
  • FIG. 3 shows an equivalent circuit diagram of a switch according to the invention in the ON state
  • FIG. 5 shows an equivalent circuit diagram of the switch during the light ⁇ arc duration.
  • a switching device has a fixed contact 1 and a movable contact 2.
  • the fixed contact 1 has a fixed main contact 11, a fixed break-off or burn-off contact 12 and a stationary arcing horn 13. Between the fixed arc horn 13 and the stationary arc Intermediate contact 12 is a temperature-dependent resistor 14. Its resistance increases with increasing temperature.
  • the movable contact 2 in turn consists of a bewegli ⁇ Chen main contact 21, a movable AbbrandWallet 22 and a movable arcing horn 23.
  • the movement of the movable light contact 2 is a bolt 24, which also moves away in the horizontal direction of the fixed contact 1 when opening the switch becomes.
  • FIG. 1 An alternative embodiment is shown in FIG.
  • the movable contact 2 is unchanged from the embodiment of FIG. However, is here no need for a temperature-dependent resistor as a separate component and a stationary arcing horn 15 is made of the b ⁇ dependent resistive material.
  • the fixed arc horn 15 is attached via the Abbrandcard 12 directly to the fixed contact 1.
  • the respective resistance element 14 or 15 has a comparatively low resistance in the cold state. In consequence ⁇ the commutation of the arc root and the current flowing therethrough is not obstructed by the contact area on the belonging to the extinguishing system fixed arcing horn. 13 Especially in the range of higher currents up to the maximum switching power results from the self-heating of the resistive element due to the current flowing through it arc current an additional voltage drop. This additional to ⁇ voltage drop increases the overall voltage consisting of arc voltage and voltage across the resistor with otherwise identical arc chamber geometries.
  • the movable contact 2 may consist of a single or several ⁇ ren individual contacts or contact fingers. In the case of multiple contacts results in a corresponding movable contact package.
  • FIG. 3 shows a simplified equivalent circuit diagram of the switch in the state ON again, in which the main contacts are closed.
  • This equivalent circuit is a series scarf ⁇ processing of the following resistances:

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

L'objectif de l'invention est de supprimer un arc électrique de manière sûre grâce à des moyens simples, lors de l'arrêt d'un appareil électrique. A cet effet, un dispositif de résistance (14), dont la résistance augmente avec la température, est disposé entre un contact fixe (1) et un contact mobile (2). Dans le cas de l'arc électrique, le courant passe du contact mobile (2) vers le contact fixe (1) par l'intermédiaire du dispositif de résistance (14) ou inversement. La résistance (14) se réchauffe par le flux de courant, et sa valeur de résistance augmente. Puis, la contrainte de tension du passage de commutation diminue et l'arc électrique peut être supprimé plus facilement.
EP05819352A 2004-12-06 2005-12-06 Circuit a resistance dependant de la temperature permettant de supprimer un arc electrique Withdrawn EP1820199A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410059097 DE102004059097A1 (de) 2004-12-06 2004-12-06 Schaltvorrichtung mit temperaturabhängigem Widerstand zum Löschen eines Lichtbogens
PCT/EP2005/056504 WO2006061375A1 (fr) 2004-12-06 2005-12-06 Circuit a resistance dependant de la temperature permettant de supprimer un arc electrique

Publications (1)

Publication Number Publication Date
EP1820199A1 true EP1820199A1 (fr) 2007-08-22

Family

ID=35708379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05819352A Withdrawn EP1820199A1 (fr) 2004-12-06 2005-12-06 Circuit a resistance dependant de la temperature permettant de supprimer un arc electrique

Country Status (3)

Country Link
EP (1) EP1820199A1 (fr)
DE (1) DE102004059097A1 (fr)
WO (1) WO2006061375A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050006B4 (de) 2008-09-30 2015-02-19 Siemens Aktiengesellschaft Schaltkontaktanordnung für einen elektrischen Schalter
FR3042638B1 (fr) 2015-10-16 2017-10-27 Schneider Electric Ind Sas Chambre de coupure d'un appareil de protection electrique et appareil de protection electrique comportant une telle chambre
CN117665400B (zh) * 2023-12-05 2024-05-24 安徽农业大学 一种基于温度检测的开关触点接触电阻在线检测系统及方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7015884U (de) * 1970-04-28 1971-06-24 Siemens Ag Lichtbogenloeschvorrichtung fuer leistungsschalter.
CH589351A5 (fr) * 1975-08-19 1977-06-30 Bbc Brown Boveri & Cie
DE4243314C2 (de) * 1992-12-21 1998-08-20 Asea Brown Boveri Strombegrenzender Schalter
FR2714520B1 (fr) * 1993-12-24 1996-01-19 Telemecanique Appareil électrique interrupteur à contacts séparables.
DE19510100A1 (de) * 1995-03-20 1996-09-26 Abb Research Ltd Elastisch verformbarer Widerstand und Vorrichtung zum Begrenzen und/oder Schalten von Strom mit einem solchen Widerstand
DE19810981A1 (de) * 1998-03-13 1999-09-16 Abb Research Ltd Schalter mit PTC-Element zur verbesserten Strombegrenzung und Lichtbogenlöschung
DE19932010C1 (de) * 1999-07-02 2001-03-08 Siemens Ag Schaltkontaktanordnung eines Niederspannungs-Leistungschalters mit Hauptkontakten, Zwischenkontakten und Abreißkontakten
US6414256B1 (en) * 2000-12-20 2002-07-02 Square D Company Current limiting circuit breaker
DE10118746B4 (de) * 2001-04-17 2004-06-24 Siemens Ag Verfahren zum Betreiben eines Schaltgerätes mit einem zuschaltbaren Strombegrenzer und zugehörige Anordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006061375A1 *

Also Published As

Publication number Publication date
DE102004059097A1 (de) 2006-06-08
WO2006061375A1 (fr) 2006-06-15

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