EP0780861A1 - Elektrisches Gerät mit Bogenkommutierung - Google Patents

Elektrisches Gerät mit Bogenkommutierung Download PDF

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Publication number
EP0780861A1
EP0780861A1 EP96402803A EP96402803A EP0780861A1 EP 0780861 A1 EP0780861 A1 EP 0780861A1 EP 96402803 A EP96402803 A EP 96402803A EP 96402803 A EP96402803 A EP 96402803A EP 0780861 A1 EP0780861 A1 EP 0780861A1
Authority
EP
European Patent Office
Prior art keywords
downstream
contacts
upstream
arc
path
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
EP96402803A
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English (en)
French (fr)
Other versions
EP0780861B1 (de
Inventor
Jean Abot
Nicolas Hertzog
Michel Ledroit
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
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
Family has litigation
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Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0780861A1 publication Critical patent/EP0780861A1/de
Application granted granted Critical
Publication of EP0780861B1 publication Critical patent/EP0780861B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode
    • 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
    • H01H71/121—Protection of release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device

Definitions

  • the present invention relates to an electrical device with separable contacts of the contactor, circuit breaker, limiter or circuit breaker contactor type, capable of being connected to a load via a main conduction path comprising a control or protection member, this device further comprising a conduction path bypass of the control or protection member, this path being capable of being implemented by switching a cutting arc.
  • Such an apparatus comprises a main current path provided with a thermomagnetic trip device, separable contacts with simple breaking, and an electronic switch arranged in series with the contacts and shuntable by a path bypass.
  • the trigger causes the contacts to open; this opening is accompanied by an arc which is drawn between the contacts, then is immediately transferred to the bypass path, so that the electronic switch remains protected during the contact opening phase.
  • Document EP-589,779 describes an electromechanical circuit breaker with double breaking by movable bridge provided with separable contacts called “upstream” - on the side of the energy source - and separable contacts called “downstream” - on the side of the load , this circuit breaker using a bypass path as defined above.
  • this known circuit breaker it is however disadvantageous that, when a breaking arc appears, the derivative current path shunting the member to be protected implements the arc voltage drops both between the upstream breaking points and between the downstream cutoff points, which leads to an increase in impedance likely to favor a re-ignition of the main current path.
  • the object of the present invention is to increase the impedance of the main conduction path when the contacts are opened in an electrical device with double breaking and with bypass path activated by arc switching.
  • the device comprises an upstream arc transfer electrode disposed in the immediate vicinity of the upstream contacts to collect one foot of the upstream arc as soon as the contacts open, this electrode being connected to a bypass path which shunts the downstream contacts and the bridge mobile.
  • the impedance of the downstream arc which occurs in the main conduction path promotes switching of the arc towards the bypass path.
  • the electric arc switching device illustrated in FIG. 1 is part of a protective device of the electrodynamic limiter type where is integrated into a device of the contactor, circuit breaker, contactor-circuit breaker or starter type, it comprises in a housing 10 two upstream and downstream movable contacts 11A, 11B arranged on a movable contact bridge 12 and capable of cooperating each with an upstream fixed contact 13A and respectively a downstream fixed contact 13B.
  • the contacts can be controlled by a control device 14 for example constituted by a contactor electromagnet, by a circuit breaker lock or by a manual control member and acting on the bridge 12 via a drive part not shown, or also by opening means with electrodynamic effect.
  • the apparatus includes a main current path 15 which is established when the contacts are closed.
  • This main path comprises the movable bridge 12 and two parts 15A, 15B located respectively upstream and downstream of the bridge and comprising conductive parts 16A, 16B which on the one hand carry the fixed contacts 13A, 13B and which on the other hand terminate to respective terminals 17A, 17B constituted in the present example by external connection terminals.
  • the qualifiers “upstream” and “downstream” denote the side of the device which is connected to an energy source 18 and respectively the side of the device connected to a load 19 via a control or protection member 33 that you wish to protect against the effects of short-circuit or cut-off overcurrents.
  • the device has an arc transfer electrode 20 associated with the upstream contacts 11A, 13A and located a short distance from the fixed contact 13A to collect, when the contacts open, the arc foot associated with the fixed contact (see figure 2).
  • the electrode 20 is separated from the j-shaped end 20A of the fixed conduction part 16A of the main current path 15 by a small and fixed spacing e, large enough to ensure in normal operation the required isolation distance, but small enough to be crossed by the foot of the upstream arc generated during a fault cut.
  • the electrode 20 is suitably isolated from the part 16a and connected by an electrically conductive path 21, bypassing the downstream contacts 11B, 13B, to a connection point 22 located on the current line downstream of the member 33 to be protected , to establish a load diversion path with a single upstream arc.
  • the connection of the electrode 20 with the connection point 22 is effected by external wiring by means of a terminal 21B for external connection of the device ( Figures 1 and 2), or by internal connection to the device ( Figure 3).
  • the respective impedances ZA, ZB between the upstream contacts 11A, 13A and downstream contacts 11B, 13B are negligible when the contacts are closed.
  • the upstream and downstream arcing voltage drops lead to an increase in the impedances ZA, ZB; from a current threshold, the upstream arc between the contacts 13A and 11A is switched to the electrode 20 by skipping the fixed interval e (see FIG. 2) to appear between the fixed contact 13A - or the corresponding area of the fixed contact piece - and the electrode 20, while the impedance ZB increases until reaching an infinite value.
  • the upstream arc transferred between the fixed contact part and the electrode 20 reduces the electrothermal stress of the upstream movable contact 11A and the movable bridge.
  • An impedance 23 of fixed or variable value ZC - for example a simple resistor or a resistor with a positive temperature coefficient - can be interposed on the bypass path, as indicated in dashes in FIG. 1.
  • the device is integrated into a device housing 10 comprising upstream another movable double-break bridge 30 urged by a circuit breaker lock 31 which is part of the control device 14 or which is autonomous if the circuit breaker box is separated from box 10 (as indicated by the broken line separation).
  • the lock 31 cooperates with an electromagnet 32 which belongs to device 14 and which controls it.
  • movable bridge 12 to open the contacts 11, 13 by voluntary command or when an overcurrent is noted by the triggering of the lock 31.
  • the protected load can then be constituted by an internal electronic device 33 switch or soft start.
  • the downstream connection point 34 of the bypass path 21 with the main path 15 is then located in the housing 10.
  • detector means not indicated act on the control means 14 which cause the opening of the movable bridge 12 and the creation of an upstream arc between the contacts 11A, 13A and d 'a downstream arc between the contacts 11B, 13B.
  • the arc voltage drops introduce respectively into the main current path an upstream impedance ZA and a downstream impedance ZB; the foot of the upstream arc associated with the fixed contact 13A is driven towards the electrode 20 by blowing means not indicated, so that the impedance ZA is inserted in the bypass path 21, while the impedance ZB remains included in main path 15 and becomes infinite.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP96402803A 1995-12-21 1996-12-18 Elektrisches Gerät mit Bogenkommutierung Revoked EP0780861B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9515464 1995-12-21
FR9515464A FR2742916B1 (fr) 1995-12-21 1995-12-21 Dispositif electrique a commutation d'arc

Publications (2)

Publication Number Publication Date
EP0780861A1 true EP0780861A1 (de) 1997-06-25
EP0780861B1 EP0780861B1 (de) 2001-10-31

Family

ID=9485936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402803A Revoked EP0780861B1 (de) 1995-12-21 1996-12-18 Elektrisches Gerät mit Bogenkommutierung

Country Status (10)

Country Link
US (1) US5777286A (de)
EP (1) EP0780861B1 (de)
CN (1) CN1068699C (de)
AU (1) AU723390B2 (de)
BR (1) BR9606127A (de)
CA (1) CA2193715A1 (de)
DE (1) DE69616488D1 (de)
FR (1) FR2742916B1 (de)
TW (1) TW308702B (de)
ZA (1) ZA9610707B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760565A1 (fr) * 1997-03-04 1998-09-11 Gen Electric Shunt de limitation de courant pour disjoncteurs a limitation de courant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD381735S (en) 1996-04-29 1997-07-29 Anthony Richard Dirito Fish bite detector
DE10118746B4 (de) * 2001-04-17 2004-06-24 Siemens Ag Verfahren zum Betreiben eines Schaltgerätes mit einem zuschaltbaren Strombegrenzer und zugehörige Anordnung
US6659783B2 (en) * 2001-08-01 2003-12-09 Tyco Electronics Corp Electrical connector including variable resistance to reduce arcing
US6958671B2 (en) * 2001-11-15 2005-10-25 Square D Company Electrical contactor with positive temperature coefficient resistivity element
ATE407441T1 (de) 2004-07-08 2008-09-15 Abb Schweiz Ag Lichtbogenlöscheinrichtung für schutzschalter
JP5986419B2 (ja) * 2012-04-13 2016-09-06 富士電機株式会社 接点装置及びこれを使用した電磁開閉器
EP3217413B1 (de) 2014-11-07 2019-01-09 Gorlan Team, S.L.U. Elektrischer schalter mit hohem thermischen wirkungsgrad und verfahren zur stromunterbrechung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104981A1 (de) 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung
EP0205369A1 (de) * 1985-05-29 1986-12-17 Merlin Gerin Niederspannungslastschalter mit Shunt-Effekt
EP0255992A2 (de) * 1986-08-04 1988-02-17 BASSANI TICINO S.p.A. Doppelpoliger Schalter für elektrische Einrichtungen im zivilen Bereich, mit einer Lichtbogenkommutierungseinrichtung
EP0350825A2 (de) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät
EP0589779A1 (de) 1992-09-25 1994-03-30 Schneider Electric Sa Leitungsschutzschalter mit magnetischer Blasschleife

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584529B1 (fr) * 1985-07-04 1995-01-06 Merlin Gerin Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs
US5410442A (en) * 1992-02-17 1995-04-25 Siemens Aktiengesellschaft Electromechanical protection devcie
FR2695754B1 (fr) * 1992-09-16 1994-11-18 Telemecanique Pièce d'association d'un contacteur avec un disjoncteur.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104981A1 (de) 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung
EP0205369A1 (de) * 1985-05-29 1986-12-17 Merlin Gerin Niederspannungslastschalter mit Shunt-Effekt
EP0255992A2 (de) * 1986-08-04 1988-02-17 BASSANI TICINO S.p.A. Doppelpoliger Schalter für elektrische Einrichtungen im zivilen Bereich, mit einer Lichtbogenkommutierungseinrichtung
EP0350825A2 (de) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät
EP0589779A1 (de) 1992-09-25 1994-03-30 Schneider Electric Sa Leitungsschutzschalter mit magnetischer Blasschleife

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760565A1 (fr) * 1997-03-04 1998-09-11 Gen Electric Shunt de limitation de courant pour disjoncteurs a limitation de courant

Also Published As

Publication number Publication date
FR2742916B1 (fr) 1998-01-16
TW308702B (en) 1997-06-21
AU723390B2 (en) 2000-08-24
CN1157466A (zh) 1997-08-20
AU7642496A (en) 1997-06-26
EP0780861B1 (de) 2001-10-31
ZA9610707B (en) 1997-06-27
DE69616488D1 (de) 2001-12-06
CN1068699C (zh) 2001-07-18
BR9606127A (pt) 1998-11-03
CA2193715A1 (fr) 1997-06-22
FR2742916A1 (fr) 1997-06-27
US5777286A (en) 1998-07-07

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