EP0022708B1 - Chambre d'extinction d'arc pour disjoncteur basse tension multipolaire à boîtier moulé - Google Patents

Chambre d'extinction d'arc pour disjoncteur basse tension multipolaire à boîtier moulé Download PDF

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Publication number
EP0022708B1
EP0022708B1 EP19800401023 EP80401023A EP0022708B1 EP 0022708 B1 EP0022708 B1 EP 0022708B1 EP 19800401023 EP19800401023 EP 19800401023 EP 80401023 A EP80401023 A EP 80401023A EP 0022708 B1 EP0022708 B1 EP 0022708B1
Authority
EP
European Patent Office
Prior art keywords
arc
circuit breaker
chamber
fact
contacts
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.)
Expired
Application number
EP19800401023
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0022708A1 (fr
Inventor
Jean Amalric
Gérard Cambon
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9227893&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0022708(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0022708A1 publication Critical patent/EP0022708A1/fr
Application granted granted Critical
Publication of EP0022708B1 publication Critical patent/EP0022708B1/fr
Expired 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the deionization device comprises metal grids or screens with fine mesh, in particular made of steel, housed in the exhaust orifices.
  • the cut-off gases generated in the extinguishing chamber during the cut-off are ventilated to the outside environment after passage through the grids acting as flame arresters, and it has been found that these gases were still strongly ionized at the outlet of the bedroom.
  • the chamber is delimited by two transverse walls and is filled over its entire height by a refractory ceramic material or by sand (quartz, zircon).
  • a refractory ceramic material or by sand (quartz, zircon).
  • the arc is extinguished inside the granular mass, and a blowing coil is essential to drive the initial arc into said mass.
  • the particle size of the sand in the extinguishing chamber decreases in the direction of movement of the arc.
  • the sand is retained by a grid or bars.
  • a magnetic blowing coil or an auxiliary pneumatic blowing device drives the arc towards the chamber filled with said sand.
  • the object of the invention is to avoid the aforementioned drawbacks and to allow the production of an extinguishing chamber with high breaking capacity, equipped with an improved deionization device of compact structure compatible with the reduced size of the circuit breaker. and allowing efficient cooling of the cut-off gases ventilated to the outside environment.
  • the extinguishing chamber is characterized in that the deionization device comprises a one-piece exhaust screen of porous structure formed by beads or grains agglomerated by any heating or sintering process, and having dimensions of between 0.5 mm and 1.5 mm corresponding to a predetermined particle size of said porous structure provided with interstices for passage of the cutting gases towards the external medium, the material of the balls comprising a metal or an alloy.
  • the material of the beads is advantageously based on copper, in particular bronze.
  • the low-voltage multi-pole circuit breaker 10 with housing 12 made of molded insulating material and with manual control lever 14, comprises, by pole, an arc extinguishing chamber 16 housed in a lower compartment 18 of the housing 12 .
  • Each arc extinguishing chamber 16 comprises a pair of separable contacts 20, 22 and a stack of V-shaped cooling plates 24 extending transversely to the direction of extension of the arc drawn between the contacts 20, 22 during their separation after tripping of the circuit breaker.
  • the fixed contact 20 is supported by a conductor 26 in the form of a U-shaped pin, positioned on an intermediate wall 27 of the housing 12 and in electrical connection with an external connection pad 28.
  • a metal shielding element 30 is inserted between the two branches of the conductor pin 26, and is provided with an extension 32 acting as an end separator.
  • the movable contact 22 is integral with a contact arm 34 associated with a pivoting bar of the actuation mechanism (not shown) common to all the poles.
  • a connecting braid 36 connects the opposite end of the arm 34 to the thermal and electromagnetic trip elements (not shown) of each pole.
  • the transverse face of the lower compartment of the housing 12 is provided with an orifice 38 for exhaust of the cut-off gases formed at the outlet from each arc extinguishing chamber 16.
  • a gas deionization device designated by the general reference 40, is arranged in each exhaust orifice 38 to reduce the external manifestations of the ionized gases in the vicinity of the connections 43 associated with the pads 28 thanks to efficient cooling. hot gases at the outlet of the chamber 16.
  • Each deionization device 40 cooperates with the sheets 24 and comprises a block 41 (fig. 3) or parallelepiped screen of porous structure, formed from beads 42 or agglomerated grains, sparing between them gas passage interstices.
  • the material of the balls 42 has both good thermal conductivity and a high heat capacity, and in particular comprises a metal or alloy with a high melting point such as bronze, copper or steel.
  • the choice of the dimensions of the balls 42 or of the grains was fundamental for determining the optimal particle size of the porous block 41 and obtaining an effective absorption of the heat at the outlet of the chamber 16 without hampering the exhaust of cut-off gases to the outside environment.
  • This particle size depends on the material chosen and on the volume of the porous block 41, and it was found during tests that the diameter of the balls42 or grains had to be between 0.5 mm and 1.5 mm in order to obtain correct exhaust of the gases and a optimum lowering of the outlet gas temperature.
  • the porous block 41 of dimensions 25 mm x 18 mm and thickness 3.6 mm comprises balls 42 of bronze having diameters close to 0.8 mm.
  • the agglomeration operation of the balls 42 or grains can be carried out by any heating or sintering process well known to specialists.
  • the porous block 41 may consist of balls 42 or grains made of non-metallic material, resistant to the high temperatures of the cutting gases, in particular a refractory or powdery ceramic material based on sand, and the dimensions of which are included in the aforementioned range from 0.5 mm to 1.5 mm.
  • An additional case 44 made of insulating material, is arranged in the exhaust zone of each arc extinguishing chamber 16, in the space provided between the ends of the sheets 24 and the porous block 41.
  • the screen 44 s 'extends in the height direction between the bottom 45 of the housing 12 and the intermediate wall 27, and is pierced with a plurality of holes 46 arranged opposite the porous block 41.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP19800401023 1979-07-12 1980-07-04 Chambre d'extinction d'arc pour disjoncteur basse tension multipolaire à boîtier moulé Expired EP0022708B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7918315 1979-07-12
FR7918315A FR2461349A1 (fr) 1979-07-12 1979-07-12 Chambre de coupure perfectionnee pour disjoncteur basse tension multipolaire a boitier moule

Publications (2)

Publication Number Publication Date
EP0022708A1 EP0022708A1 (fr) 1981-01-21
EP0022708B1 true EP0022708B1 (fr) 1983-10-05

Family

ID=9227893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800401023 Expired EP0022708B1 (fr) 1979-07-12 1980-07-04 Chambre d'extinction d'arc pour disjoncteur basse tension multipolaire à boîtier moulé

Country Status (3)

Country Link
EP (1) EP0022708B1 (enExample)
DE (1) DE3065153D1 (enExample)
FR (1) FR2461349A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570116B2 (en) 2001-08-16 2003-05-27 Square D Company Current carrying assembly for a circuit breaker
US7176771B2 (en) 2001-08-24 2007-02-13 Square D Company Circuit breaker filter assembly

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446041A1 (de) * 1984-12-18 1986-06-19 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer leitungsschutzschalter
FR2655770B1 (fr) * 1989-12-11 1995-10-20 Merlin Gerin Disjoncteur multipolaire a filtre des gaz commun aux differents poles.
FR2710452B1 (fr) * 1993-09-20 1995-11-24 Merlin Gerin Interrupteur haute tension à arc tournant.
FR2750531B1 (fr) * 1996-06-28 1998-08-07 Schneider Electric Sa Dispositif de desionisation des gaz notamment des gaz de coupure dans une chambre d'extinction d'arc d'un disjoncteur basse tension a boitier moule et chambre d'extinction d'arc equipee de ce dispositif
DE19803925A1 (de) * 1998-02-02 1999-08-05 Maier & Cie C Installationsschalter
DE10149019C1 (de) * 2001-09-28 2003-06-18 Siemens Ag Lichtbogenlöscheinrichtung für Niederspannungs-Schaltgeräte
US10134537B2 (en) 2015-02-17 2018-11-20 Abb Schweiz Ag Filter assembly for a circuit breaker arc chamber
FR3049386B1 (fr) * 2016-03-24 2018-04-20 Schneider Electric Industries Sas Appareil electrique de coupure d'un courant electrique dans l'air comportant un dispositif de filtrage des gaz de coupure ameliore
FR3065316B1 (fr) * 2017-04-14 2019-07-05 Schneider Electric Industries Sas Dispositif de filtrage de gaz de coupure pour un appareil de coupure d'un courant electrique et appareil de coupure d'un courant electrique comportant ce dispositif de filtrage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544434A (en) * 1925-03-06 1925-06-30 George D Doughty Cross-word-puzzle game
GB551966A (en) * 1941-12-23 1943-03-17 Gen Electric Improvements in air-break electric circuit breakers
CH247847A (de) * 1943-03-31 1947-03-31 Skoda Kp Stromunterbrechungseinrichtung.
FR1364701A (fr) * 1963-05-11 1964-06-26 Merlin Gerin Chambre d'extinction pour sectionneurs à coupure sous charge
FR1544434A (fr) * 1966-11-14 1968-10-31 Gen Electric Disjoncteur électrique à boîte de soufflage de l'arc
CH543174A (de) * 1971-09-30 1973-10-15 Carl Maier & Cie Elek Sche Sch Leitungsschutzschalter
GB1496339A (en) * 1974-04-23 1977-12-30 Airpax Electronics Overcurrent moulded case automatic circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570116B2 (en) 2001-08-16 2003-05-27 Square D Company Current carrying assembly for a circuit breaker
US7176771B2 (en) 2001-08-24 2007-02-13 Square D Company Circuit breaker filter assembly

Also Published As

Publication number Publication date
FR2461349A1 (fr) 1981-01-30
DE3065153D1 (en) 1983-11-10
EP0022708A1 (fr) 1981-01-21
FR2461349B1 (enExample) 1982-02-19

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