EP0206882A1 - Niederspannungsschalter mit Unterbrechung - Google Patents

Niederspannungsschalter mit Unterbrechung Download PDF

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Publication number
EP0206882A1
EP0206882A1 EP86401190A EP86401190A EP0206882A1 EP 0206882 A1 EP0206882 A1 EP 0206882A1 EP 86401190 A EP86401190 A EP 86401190A EP 86401190 A EP86401190 A EP 86401190A EP 0206882 A1 EP0206882 A1 EP 0206882A1
Authority
EP
European Patent Office
Prior art keywords
contacts
arc
chamber
movable
circuit breaker
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
EP86401190A
Other languages
English (en)
French (fr)
Other versions
EP0206882B1 (de
Inventor
Jean-Philippe Neel
Jean-Pierre Trahin
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT86401190T priority Critical patent/ATE56305T1/de
Publication of EP0206882A1 publication Critical patent/EP0206882A1/de
Application granted granted Critical
Publication of EP0206882B1 publication Critical patent/EP0206882B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • 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
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
    • 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a low-voltage multipole circuit breaker with a molded case according to the preamble of claim 1.
  • the present invention aims to allow the realization of a molded case circuit breaker with improved breaking capacity by particularly simple and effective means, and devoid of arcing contacts.
  • an insulating screen is associated with the movable contacts, so as to confine with the fixed contacts an arc-forming chamber open towards the breaking chamber.
  • the insulating screen notably closes the intervals between the various movable contacts, as well as the gap formed between the insulating partitions delimiting the compartments of the different poles and the adjacent movable contacts.
  • the insulating screen is advantageously a single piece molded from a gas-generating material having slots for passage of the contact arms.
  • the central part of the insulating screen extends parallel to the fixed contacts at a short distance from the latter to delimit an arc-forming chamber of low height.
  • the limited volume of the arc chamber ensures a rapid increase in pressure due to the thermal and gas-generating action of the arc.
  • the compressed gases escape to the breaking chamber by blowing the arc which very quickly leaves the contact area.
  • the rapid initial displacement of the arc also results from a particular conformation of the arc migration tracks constituted by arc horns associated with the contacts.
  • the fixed arcing horn has a boss having a flank parallel to the direction of movement of the movable contact to define a region of small spacing preventing any re-ignition of the arc on the contacts.
  • the arc horns define divergent tracks from the contacts which favor the displacement of the arc which tends to lengthen.
  • the fixed arc horn is preferably made of stainless steel or of refractory material and it extends into the breaking chamber of which it constitutes one of the end plates.
  • the boss of the fixed bow horn limits the initial elongation of the bow in the area adjacent to the contacts.
  • the combined action of the insulating screen and arcing horns allows the creation of a circuit breaker with a simplified active part.
  • the contact fingers are simple copper blades articulated on a common axis carried by a support of movable contacts.
  • the movable contact consists of a patch attached to one of the longitudinal edges of the blade which forms with the front edge the movable arc horn.
  • the breaking chamber comprises deionization plates and according to a development of the invention, the bottom of this chamber is closed by a valve arranged in the deflector of the gases escaping from the chamber.
  • the valve opens automatically when there is a significant overpressure in the chamber, the gases flowing outwards along a baffled route.
  • the valve makes it possible to control the pressure inside the cutting chamber and. ensure extinction of the arc regardless of its intensity.
  • the valve is advantageously constituted by an insulating plate made of a gas-generating material, the side walls of the chamber can also be made of gas-generating material.
  • a low voltage electric circuit breaker comprises a molded case at the bottom 10 and with cover 12 in which is housed a mechanism designated by the general reference 14.
  • the electrical part of the circuit breaker comprises input 16 and output 1 9 terminals , the input terminal 16 being connected to a fixed contact 18 by a conductor 17, attached to the bottom 10 of the molded housing.
  • movable contacts 20 pivotally mounted on an axis 22 carried by a contact support 24, integral with a bar 26 for connection between the different poles of the circuit breaker.
  • Movable contacts 20 are connected by braids 28 to a conductor 30 fixed to the output terminal 19.
  • the conductor 30 constitutes the primary winding of a current transformer 72 in the form of a toroid.
  • Springs 32 interposed between the support 24 and the movable contacts 20, ensure the contact pressure.
  • the mechanism 14 comprises a handle 38 passing through a lumen 40 of the cover 12 and secured to a support 42, pivotally mounted on a fixed axis 44 carried by flanges 46, secured to the molded housing by screws 48.
  • a hook 52 On another fixed axis 50 is articulated a hook 52 whose end 54 cooperates with an attachment 56.
  • the lower link 64 of the toggle joint is articulated on an axis 66 carried by the support 24.
  • a tension spring 68 is anchored on the one hand on the axis 62 of the toggle joint and on the other hand on an axis 70 carried by the support 42 for handle 38.
  • Manual opening of the circuit breaker is controlled by the pivoting of the handle 38 which causes the toggle joint 60, 64 to break, and the movable contacts to move to the open position.
  • the pivoting in the opposite direction of the handle 38 controls the closing of the contacts 18, 20.
  • a tripping circuit advantageously electronic, controls the unlocking of the latching 56, so to release the hook 52.
  • the pivoting of the hook 52 ensures the automatic opening of the contacts 18, 20.
  • the circuit breaker has 3 poles, each housed in a compartment delimited by longitudinal partitions 74 of the molded housing.
  • the 3 poles are identical and only one of them is described below, more particularly with reference to Figures 2 to 5.
  • On the axis 22 of the support 24 are mounted with limited pivoting 5 contact arms 76, each consisting of 2 blades 78 joined and secured, in particular by a movable contact pad 80 welded to the longitudinal edge of the blades 78.
  • the contact arms 76 are extended beyond the hinge axis 22 by a heel 82 cooperating with the support 24 to limit the pivoting of the contact arms 76 anti-clockwise in the figures, under the action of the contact pressure spring 32.
  • the contact pads 80 are fixed in an intermediate part of the blades 78 between the axis 22 and the front end 84 of the blades 78.
  • the front face 84 and the longitudinal edge 86 projecting from the movable contact pad 80 constitutes an arc horn extending opposite a horn d fixed arc 88 associated with fixed contact 18.
  • Contact f ixe 18 comprises a contact area common to all of the movable contacts 20 of the pole and the fixed arcing horn 88 is a plate extending between the fixed contact 18 and the breaking chamber 34 of which it constitutes one of end plates.
  • the fixed arcing horn 88 has, in its part adjacent to the contact 18, a planar part 90 situated in the plane of the fixed contact 18.
  • the planar part 98 is extended by a part folded into a boss 92 having a side extending in the direction of displacement of the movable contact 20.
  • the movable arcing horn 86 forms with the flat part 90 of the horn d 'fixed arc 88 a divergent track oriented towards the breaking chamber 34.
  • the folded part 92 of the fixed arc horn 88 is very close to the front edge 84 of the blades 78. The arc drawn, during separation contacts 18, 20, first moves on the divergent tracks 86, 90, to quickly anchor on the boss 92 and the facing edge 84.
  • the movable contact 20 is associated with a screen 94 made of a gas-forming molded insulating material.
  • the screen 94 consists of three parts, in this case lamellae 96 inserted in the separation intervals of the contact arms 76, a front part 98 extending the front face 84 of the blades 78 and a rear part 100 disposed at the axis 22 of articulation of the contact arms 76.
  • the screen 94 has notches 102 for clipping onto the axis 22, the screen being rigidly or with little play secured to the movable contact 20.
  • the lamella assembly 96 and contact arm 76 forms with the front part 98 of the screen 94 a partition cooperating with little play with ribs 104 provided on the lateral partitions 74.
  • This partition 96, 98 extends in the direction of movement of the movable contact 20 to the rear of the front face 84 of the blades 78.
  • the rear part 100 of the screen 94 cooperates with little play with the lateral partitions 74 and with the bottom 10 of the molded case at the instant of separation contacts 18, 20, for closing the space arranged at the rear re contacts 18, 20.
  • the lower edge 105 of the strips 96 extends substantially parallel to the fixed contact 18 in the closed position of the contacts, slightly retracting the longitudinal edges of the blades 78, carrying the contact pads 80. Referring more particularly in FIG.
  • the contacts 18, 20 are housed in the closed position in a space constituting an arcing chamber, delimited at the bottom by the fixed contact 18 and the wall 10, at the upper part by the blades 78 and the interposed lamellae 96 and in the right part, in FIG. 3 by the part 100 of the screen 94.
  • This arc-forming chamber is open on the side of the breaking chamber 34 by a passage confined by the boss 92 and the front part 98 of the screen 94. It is easy to see that the volume of this arc-forming chamber is low and that an arc drawn during the separation of the contacts 18, 20, causes a rapid increase in pres sion in the formation chamber with a flow of gases to the breaking chamber 34. This gas flow blows the arc towards the chamber 34 forcing it to quickly leave the contacts 18, 20.
  • the gas-generating effect of screen 94 participates in this active blowing of the arc.
  • the combined arc blowing action due to the insulating screen 94 and the configuration of the arcing horns 86, 88, allows the production of a circuit breaker with high breaking capacity, devoid of arcing contacts. . It is clear that the invention is applicable to a mobile contact having a different number of contact arms 76, in particular a single mobile contact arm.
  • the interrupting chamber 34 is closed at its rear part opposite the contacts 18, 20, by a plate or a pair of plates 106, made of an advantageously gas-generating insulating material.
  • the plate 106 is fixed by its upper edge 108 to the carcass of the cutting chamber 34 and it has a certain elasticity or a possibility of pivoting to move away from the ends of the sheets 36 by clearing a passage 110 for exhaust of the gases of the interrupting chamber 34.
  • the interrupting chamber 34 is closed by the plate 106 authorizing a rise in pressure sufficient to extinguish the arc.
  • the rise in pressure causes the plate 106 to deflect, allowing gases to escape and a pressure limitation in the cutting chamber 34.
  • the plate 106 acts as a gas deflector towards the bottom 10 of the molded housing, these gases subsequently escaping through orifices 112, formed in the cover 12.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Control Of Eletrric Generators (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Electrophonic Musical Instruments (AREA)
EP86401190A 1985-06-12 1986-06-03 Niederspannungsschalter mit Unterbrechung Expired - Lifetime EP0206882B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401190T ATE56305T1 (de) 1985-06-12 1986-06-03 Niederspannungsschalter mit unterbrechung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8509002A FR2583571B1 (fr) 1985-06-12 1985-06-12 Disjoncteur basse tension a coupure amelioree.
FR8509002 1985-06-12

Publications (2)

Publication Number Publication Date
EP0206882A1 true EP0206882A1 (de) 1986-12-30
EP0206882B1 EP0206882B1 (de) 1990-09-05

Family

ID=9320221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401190A Expired - Lifetime EP0206882B1 (de) 1985-06-12 1986-06-03 Niederspannungsschalter mit Unterbrechung

Country Status (11)

Country Link
US (1) US4672157A (de)
EP (1) EP0206882B1 (de)
JP (1) JPH0719529B2 (de)
AT (1) ATE56305T1 (de)
AU (1) AU576726B2 (de)
CA (1) CA1267671A (de)
DE (1) DE3673887D1 (de)
ES (1) ES8705157A1 (de)
FR (1) FR2583571B1 (de)
PT (1) PT82756B (de)
ZA (1) ZA864285B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619955A1 (fr) * 1987-08-31 1989-03-03 Merlin Gerin Dispositif de coupure pour disjoncteur electrique multipolaire a contacts multiples
EP0345412A2 (de) * 1988-06-09 1989-12-13 Electric Power Research Institute, Inc Fernbetätigbarer Schalter mit Lichtbogenantreibvorrichtung
EP0358288A2 (de) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Kontaktanordnung für einen Leistungsschalter mit Vor- und Hauptkontakten
EP0358289A2 (de) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Bewegbare Kontaktanordnung mit einem Abschirmkörper
EP0410902A1 (de) * 1989-07-26 1991-01-30 Merlin Gerin Niederspannungs-Hochstromschalter mit Mehrfachkontakten
EP1085552A1 (de) * 1999-09-16 2001-03-21 General Electric Company Abbrandkontaktanordnung
EP2383760A1 (de) 2010-04-27 2011-11-02 Schneider Electric Industries SAS System mit einem Ventil für eine Lichtbogenlöschkammer, und damit versehener Schutzschalter

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876424A (en) * 1988-09-19 1989-10-24 Siemens Energy & Automation, Inc. Barrier with a venting scheme for a circuit breaker
US5457296A (en) * 1992-07-17 1995-10-10 Square D Company Circuit breaker enclosure
US5608198A (en) * 1995-06-26 1997-03-04 Square D Company Circuit breaker arrangement for protection against electrical arcs
DE10222011C1 (de) * 2002-05-17 2003-11-20 Moeller Gmbh Leistungsschalter für hohe Ströme und Niederspannung
DE10222010C1 (de) * 2002-05-17 2003-11-20 Moeller Gmbh Leistungsschalter für hohe Ströme und Niederspannung
JP3959684B2 (ja) * 2002-09-09 2007-08-15 富士電機機器制御株式会社 回路遮断器
EP1615246A1 (de) * 2004-07-05 2006-01-11 ABB Schweiz AG Lichtbogenlöscheinrichtung für Schutzschalter
US8183490B2 (en) * 2009-09-28 2012-05-22 Eaton Corporation Shield apparatus for circuit breaker
FR3027728B1 (fr) * 2014-10-22 2017-12-08 Socomec Sa Dispositif de coupure d'arc electrique
FR3036841B1 (fr) * 2015-05-28 2017-06-23 Schneider Electric Ind Sas Pole mobile et appareil de coupure
FR3123143A1 (fr) * 2021-05-21 2022-11-25 Socomec Module de coupure électrique équipé d’un dispositif de soufflage magnétique et appareil de coupure électrique comportant un tel module

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021054B (de) * 1954-05-11 1957-12-19 Siemens Ag Schaltkammer fuer elektrische Schaltgeraete
US2839641A (en) * 1954-09-30 1958-06-17 Ite Circuit Breaker Ltd Arc shield for circuit breaker arc quencher
DE1926693A1 (de) * 1969-05-24 1970-11-26 Siemens Ag Lichtbogenloeschkammer fuer Niederspannungsleistungsschalter
DE2643433B1 (de) * 1976-09-27 1977-06-08 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2484136A1 (fr) * 1980-06-06 1981-12-11 Merlin Gerin Contacts electriques perfectionnes pour disjoncteurs multipolaires a basse tension et procede de fabrication des contacts
EP0142404A1 (de) * 1983-10-04 1985-05-22 Hager Electro S.A. Schalter mit schwenkbarem Kontaktträger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583570B1 (fr) * 1985-06-12 1988-07-15 Merlin Gerin Disjoncteur a boitier moule.
AU5922286A (en) * 1985-07-12 1987-01-15 Westinghouse Electric Corporation Circuit breaker with arc commutating structure
US4660009A (en) * 1985-07-29 1987-04-21 Westinghouse Electric Corp. Modular integral circuit interrupter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021054B (de) * 1954-05-11 1957-12-19 Siemens Ag Schaltkammer fuer elektrische Schaltgeraete
US2839641A (en) * 1954-09-30 1958-06-17 Ite Circuit Breaker Ltd Arc shield for circuit breaker arc quencher
DE1926693A1 (de) * 1969-05-24 1970-11-26 Siemens Ag Lichtbogenloeschkammer fuer Niederspannungsleistungsschalter
DE2643433B1 (de) * 1976-09-27 1977-06-08 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2484136A1 (fr) * 1980-06-06 1981-12-11 Merlin Gerin Contacts electriques perfectionnes pour disjoncteurs multipolaires a basse tension et procede de fabrication des contacts
EP0142404A1 (de) * 1983-10-04 1985-05-22 Hager Electro S.A. Schalter mit schwenkbarem Kontaktträger

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619955A1 (fr) * 1987-08-31 1989-03-03 Merlin Gerin Dispositif de coupure pour disjoncteur electrique multipolaire a contacts multiples
EP0306382A1 (de) * 1987-08-31 1989-03-08 Merlin Gerin Schalteranordnung für elektrische mehrpolige Schutzschalter mit mehreren Kontakten
US4877929A (en) * 1987-08-31 1989-10-31 Merlin Gerin Breaking device for multipole electrical circuit breaker with multiple contacts
EP0345412A3 (en) * 1988-06-09 1990-08-01 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
EP0345412A2 (de) * 1988-06-09 1989-12-13 Electric Power Research Institute, Inc Fernbetätigbarer Schalter mit Lichtbogenantreibvorrichtung
EP0358288A2 (de) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Kontaktanordnung für einen Leistungsschalter mit Vor- und Hauptkontakten
EP0358289A2 (de) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Bewegbare Kontaktanordnung mit einem Abschirmkörper
EP0358288A3 (de) * 1988-09-08 1991-01-02 Siemens Aktiengesellschaft Kontaktanordnung für einen Leistungsschalter mit Vor- und Hauptkontakten
EP0358289A3 (de) * 1988-09-08 1991-05-15 Siemens Aktiengesellschaft Bewegbare Kontaktanordnung mit einem Abschirmkörper
EP0410902A1 (de) * 1989-07-26 1991-01-30 Merlin Gerin Niederspannungs-Hochstromschalter mit Mehrfachkontakten
FR2650434A1 (fr) * 1989-07-26 1991-02-01 Merlin Gerin Disjoncteur basse tension a contacts multiples et a fortes intensites
EP1085552A1 (de) * 1999-09-16 2001-03-21 General Electric Company Abbrandkontaktanordnung
EP2383760A1 (de) 2010-04-27 2011-11-02 Schneider Electric Industries SAS System mit einem Ventil für eine Lichtbogenlöschkammer, und damit versehener Schutzschalter
US9064648B2 (en) 2010-04-27 2015-06-23 Schneider Electric Industries Sas Valve system for an arc extinguishing chamber and circuit breaker comprising same

Also Published As

Publication number Publication date
AU576726B2 (en) 1988-09-01
JPS6271140A (ja) 1987-04-01
JPH0719529B2 (ja) 1995-03-06
ATE56305T1 (de) 1990-09-15
ZA864285B (en) 1987-01-28
ES8705157A1 (es) 1987-05-01
FR2583571A1 (fr) 1986-12-19
PT82756A (fr) 1986-07-01
ES555746A0 (es) 1987-05-01
AU5853986A (en) 1986-12-18
FR2583571B1 (fr) 1994-02-18
CA1267671A (en) 1990-04-10
PT82756B (pt) 1990-06-29
US4672157A (en) 1987-06-09
DE3673887D1 (de) 1990-10-11
EP0206882B1 (de) 1990-09-05

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