EP0817223B1 - Entionisierungsvorrichtung für Gase, insbesondere für Schaltgase in eine Lichtbogenlöschkammer eines Niederspannungslastschalters mit gegossenem Gehäuse, und mit einer solchen Vorrichtung versehene Lichtbogenlöschkammer - Google Patents

Entionisierungsvorrichtung für Gase, insbesondere für Schaltgase in eine Lichtbogenlöschkammer eines Niederspannungslastschalters mit gegossenem Gehäuse, und mit einer solchen Vorrichtung versehene Lichtbogenlöschkammer Download PDF

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Publication number
EP0817223B1
EP0817223B1 EP97410062A EP97410062A EP0817223B1 EP 0817223 B1 EP0817223 B1 EP 0817223B1 EP 97410062 A EP97410062 A EP 97410062A EP 97410062 A EP97410062 A EP 97410062A EP 0817223 B1 EP0817223 B1 EP 0817223B1
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EP
European Patent Office
Prior art keywords
yarns
gases
arc extinguishing
extinguishing chamber
undulated
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 - Lifetime
Application number
EP97410062A
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English (en)
French (fr)
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EP0817223A1 (de
Inventor
Marc Rival
Christophe Kilindjian
Yves Clery
Serge Bonente
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
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0817223A1 publication Critical patent/EP0817223A1/de
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Publication of EP0817223B1 publication Critical patent/EP0817223B1/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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the present invention relates to a gas deionization device intended in particular for be placed in the exhaust port area of a switch-off chamber low-voltage multipole circuit breaker with molded case, and an arc extinguishing chamber equipped of this device.
  • European patent EP 0 022 708 describes a deionization device comprising a screen porous formed from agglomerated beads made from copper. Interstices are formed between the balls for the passage of the breaking gases to the outside environment. This device, of compact structure, allows relatively efficient cooling of gases cut-off ventilated from an extinguishing chamber with high breaking capacity.
  • the present invention provides an improved structure deionization device compact, allowing even more efficient cooling of the breaking gases leaving towards the external environment, so as to reduce external manifestations.
  • This device is intended to be incorporated in an arc extinguishing chamber capable of high cutoff and has a structure adapted to the arc energy developed in said room.
  • the subject of the present invention is a device for deionizing gases, comprising a porous screen intended in particular to be arranged in the vicinity of the orifice exhaust from the breaking chamber of a low voltage circuit breaker to ensure cooling of the breaking gases generated during the separation of the contacts after tripping of the circuit breaker,
  • the porous screen aforementioned comprises at least one fabric known as reps comprising an intertwining of straight threads spaced apart and parallel to each other with wavy wires tightly joined together, said wires wavy extending substantially perpendicular to said straight and passing wires alternately above and below at least one of the successive straight wires.
  • the above-mentioned fabric (s) is (are) produced in one corrosion-resistant metallic material such as stainless steel or nickel.
  • each fabric has substantially shaped meshes triangular intended for the passage of gas and each defined by a straight wire and two wires wavy tangent to each other in the median plane of the tissue.
  • At least one of the abovementioned fabrics comprises threads wavy passing alternately above and below only one straight wire at a time, and arranged in pairs so that when one passes over a straight wire, the other goes below this same straight wire.
  • At least one of the aforementioned fabrics comprises threads wavy passing alternately below and above two straight wires at a time, each times with offset of a straight wire compared to the previous wavy wire, the wavy wires being nested.
  • the corrugated threads are the weft threads.
  • the diameter of the corrugated wires is smaller than that of the wires rights.
  • it comprises at least two superimposed fabrics having different size mesh openings.
  • it comprises at least three superimposed fabrics having openings of progressive mesh, the fabric with the largest mesh openings says first fabric, being crossed first by the gases.
  • the aforementioned first fabric has a diameter of wavy and straight threads greater than 0.5 mm and a nominal opening greater than 400 ⁇ m, while the latter fabric has a nominal opening of less than 200 ⁇ m.
  • the invention also relates to an arc extinguishing chamber in particular for low-voltage multipole circuit breaker with insulated molded case, comprising per pole: one pair of fixed and movable separable contacts, a contact actuation mechanism mobile, metal sheets for cooling the arc drawn between said contacts during their separation, a cut-off gas exhaust port in the housing at the exit from said chamber and a deionization device according to any one of previous claims arranged in the vicinity of said exhaust port for cooling the breaking gases leaving towards the outside environment.
  • this room also comprises at least one screen additional perforated in insulating material, placed between the ends of the above cooling and porous screen.
  • this chamber also comprises, perforated sheets or stiffeners placed on either side of the porous screen in order to increase its resistance mechanical to the pressure wave.
  • Figures 9, 10 and 11 are partial views, in section, illustrating two meshes triangular associated respectively with a reps fabric of plain chain, with a reps fabric of crossed chain and a reps fabric of solid chain with high porosity.
  • FIG 1 we see a low-voltage multipole circuit breaker Dr with housing made of material molded insulation and manual control handle.
  • This Dr circuit breaker comprises by pole an arc extinguishing chamber 1 housed in a lower compartment of the housing B.
  • Each arc extinguishing chamber 1 includes a pair of separable contacts 2, 3 and a stack of V-shaped notched cooling sheets 4 extending transversely to the direction of extension of the arc drawn between contacts 2, 3 when they separate after tripping of the circuit breaker.
  • the fixed contact 2 is supported by a shaped conductor 5 U-shaped pin, positioned on an intermediate wall 6 of the housing B and in connection electric with an external connection area 7.
  • a shielding element 8 metal is inserted between the two branches of the conductor pin 5 and has a extension 9 playing the role of end separator.
  • the movable contact 3 is integral with a contact arm 10 associated with a pivoting bar of the actuating mechanism (not shown) common to all poles.
  • a connecting braid 11 connects the opposite end from arm 10 to the thermal and electromagnetic triggers (not shown) of each pole.
  • the transverse face of the lower compartment of the housing B is provided with a cut-off gas exhaust port 12 at the outlet of each chamber arc extinction 1.
  • a gas deionization device designated by the general reference R, is arranged in each exhaust port 12 to reduce the manifestations of the ionized gases thanks to efficient cooling of the hot gases at the outlet of chamber 1.
  • Each deionization device R cooperates with the sheets 4 and includes a porous screen E formed by the juxtaposition of several metallic fabrics called reps T.
  • These reps T fabrics are generally formed by an intertwining of straight threads 15 spaced and parallel to each other with tightly knit corrugated wires 16 passing alternately above and below one or more of the successive straight wires 15, in extending substantially perpendicular to said straight wires 15.
  • rep T fabrics can have different structures, for example a structure united reps or a cross rep structure.
  • the united reps structure represented on the Figures 2, 4 and 6, the fabric T is formed of parallel straight threads 15 and wavy threads 16 passing alternately above and below successive straight wires 15, one at a time, and each times, with offset of a straight wire 15 with respect to the preceding wavy wire, that is to say that two adjacent wavy wires 16 pass respectively above and below the same wire right 15.
  • each fabric T is formed of straight wires 15 and corrugated wires 16, each corrugated wire 16 passing alternately through above and below two straight wires 15 both with offset of a straight wire 15 by compared to the preceding corrugated wire, the corrugated wires 16 being nested.
  • the parameters defining these structures are inter alia the diameters of the straight wires 15 and corrugated 16, the spacing (or not) of the straight wires 15, the nominal or empty opening of mesh, which corresponds, as illustrated in Figures 9, 10, 11 to the diameter of the sphere S tangent to the wires 16a, 16b forming the mesh.
  • the diameter d of the wires corrugated 16 will be less than the diameter D of the straight wires 15. This weaving makes it possible to obtain mesh openings significantly smaller than the diameter d, D of the constituent wires 15, 16 some cobweb.
  • the porous screen E is constituted by several fabrics T as described previously, stacked on top of each other (advantageously, between 2 and 5 fabrics). These juxtaposed fabrics T have progressive mesh openings, fabric T having the openings the most important, i.e. with the largest wire diameter, being located so as to be crossed first by the gases. So this first fabric has a significant thermomechanical robustness, necessary for the first gas filtering element while the latter will have the minimum mesh opening required for maximum cooling of the breaking gases.
  • the diameters d, D of threads (wavy and straight) associated with the first fabric will be greater than 0.5 mm and the opening nominal greater than 400 ⁇ m, while the nominal mesh opening associated with the last tissue will be less than 200 ⁇ m.
  • an additional screen 17 of insulating material will advantageously placed in the exhaust zone of the arc extinguishing chamber 1, in the gap between the ends of the sheets 4 and the porous screen E according to the invention.
  • This insulating screen 17 disposed opposite the porous screen E has a perforation regular and perfectly defined allowing gas circulation. This screen 17 is intended to prevent the arc from looping back on the metal elements of the filter.
  • perforated sheets or stiffeners may be added on both sides of the porous screen E. These perforated sheets will allow stir the gas and increase the mechanical strength of the assembly in order to resist the pressure wave associated with breaking short-circuit currents.
  • the ionized gases cross the meshes M formed in the different layers of fabric, each mesh M being defined as more particularly visible in FIGS. 9 to 11, whatever the structure of the fabric, united reps or crossed reps, by a straight thread 15 and two threads wavy 16 tangents to each other in the median p plane of the fabric.
  • the ionized gas flows at through these passages of minimum section being strongly disturbed in terms of direction and speed.
  • Figures 7 and 8 to observe the gas path respectively in a plain reps fabric and a crossed reps fabric.
  • the fabric T it is necessary for the fabric T to retain a certain porosity in order to allow an exit of the gases thus limiting the overpressure appearing in the device. It will therefore be necessary to find a compromise between the exhaust section and the exchange surface.
  • rep tissue may be considered such as for example, the high porosity reps fabric as illustrated in FIG. 11, in which the threads the finest 20 are of a diameter less than the diameter of the sphere S tangent to the wires forming the mesh M.
  • the material constituting the wires may be any metallic material which conducts heat and corrosion resistant such as stainless steel or nickel.
  • the number of superimposed fabrics will be adapted according to the arc energy developed in the breaking chamber. For example, for an energy of 200kj, four thicknesses will be used.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Woven Fabrics (AREA)
  • Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Apparatus For Making Beverages (AREA)

Claims (13)

  1. Gasentionisierungsvorrichtung mit einem porösen Schirm, der insbesondere dazu dient, in der Nähe der Ausströmöffnung der Lichtbogenlöschkammer eines Niederspannungs-Leistungsschalters angeordnet zu werden, um die Kühlung der nach dem Auslösen des Leistungsschalters bei der Kontakttrennung erzeugten Schaltgase zu gewährleisten,
    dadurch gekennzeichnet, daß der genannte poröse Schirm (E) mindestens ein als Rips bezeichnetes Gewebe (T) mit einer Verkreuzung aus, mit Abstand parallel zueinander angeordneten geraden Drähten (15) sowie direkt aneinanderliegenden, gewellten Drähten (16) umfaßt, welche gewellten Drähte (16) annähernd senkrecht zu den geraden Drähten (15) verlaufen und abwechselnd jeweils unter und über mindestens einen der aufeinanderfolgenden geraden Drähte (15) geführt sind.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das genannte/die genannten Gewebe (T) aus einem korrosionsbeständigen metallischen Material wie zum Beispiel Edelstahl oder Nickel besteht/bestehen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes Gewebe (T) im annähernd dreieckig geformte Maschen M umfaßt, die dazu dienen, vom Gas durchströmt zu werden und jeweils durch einen geraden Draht (15) und zwei, in der Mittelebene p des Gewebes (T) tangential zueinander verlaufende gewellte Drähte (16) definiert sind.
  4. Vorrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens eines der genannten Gewebe (T) abwechselnd unter und über jeweils einen geraden Draht (15) geführte gewellte Drähte (16) umfaßt, die paarweise so angeordnet sind, daß bei Führung eines dieser Drähte über dem geraden Draht (15) der jeweils andere unter dem gleichen geraden Draht (15) verläuft.
  5. Vorrichtung nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mindestens eines der genannten Gewebe (T) gewellte Drähte (16) umfaßt, die abwechselnd unter und über je zwei gerade Drähte (15) geführt sind, wobei die Unter- bzw. Überkreuzung durch zwei aufeinanderfolgende gewellte Drähte (16) jeweils um einen geraden Draht (15) versetzt erfolgt und die gewellten Drähte (16) sich überlappen.
  6. Vorrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die gewellten Drähte (16) die Schußdrähte darstellen.
  7. Vorrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die gewellten Drähte (16) einen kleineren Durchmesser aufweisen als die geraden Drähte (15).
  8. Vorrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie mindestens zwei übereinanderliegende Gewebe (T) mit unterschiedlichen Maschenweiten umfaßt.
  9. Vorrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie mindestens drei übereinanderliegende Gewebe (T) mit zunehmender Maschenweite umfaßt, wobei das als erstes Gewebe bezeichnete Gewebe (T) mit den größten Maschenöffnungen als erstes von den Gasen durchströmt wird.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Durchmesser (d) der gewellten Drähte (16) und der geraden Drähte (15) des genannten ersten Gewebes (T) größer als 0,5 mm und die Nennmaschenweite größer als 400 µm ist, während die Nennmaschenweite des letzten Gewebes unter 200 µm beträgt.
  11. Lichtbogenlöschkammer, insbesondere für einen mehrpoligen Niederspannungs-Leistungsschalter mit Isolierstoffgehäuse, die pro Pol einen feststehenden und einen bewegbaren Kontakt (2, 3), einen Mechanismus zur Betätigung des bewegbaren Kontakts (2), Metallbleche (4) zur Kühlung des zwischen den Kontakten (2, 3) bei deren Trennung erzeugten Lichtbogens, eine am Ausgang der genannten Löschkammer (1) im Gehäuse (B) ausgebildete Gasausströmöffnung (12) umfaßt, dadurch gekennzeichnet daß sie ferner eine in der Nähe der genannten Ausströmöffnung (12) angeordnete Entionisierungsvorrichtung (R) zur Kühlung der an das Umgebungsmedium abgegebenen Schaltgase gemäß irgendeinem der vorhergehenden Ansprüche umfaßt.
  12. Lichtbogenlöschkammer nach Anspruch 11, dadurch gekennzeichnet, daß sie mindestens einen zusätzlichen Isolierstofflochschirm (17) umfaßt, der zwischen den Enden der genannten Kühlbleche (4) und dem porösen Schirm (E) angeordnet ist.
  13. Lichtbogenlöschkammer nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die genannte Löschkammer (1) darüber hinaus Lochbleche bzw. Versteifungselemente umfaßt, die auf beiden Seiten des porösen Schirms (E) zur Erhöhung seiner mechanischen Festigkeit gegenüber der Druckwelle angeordnet sind.
EP97410062A 1996-06-28 1997-06-13 Entionisierungsvorrichtung für Gase, insbesondere für Schaltgase in eine Lichtbogenlöschkammer eines Niederspannungslastschalters mit gegossenem Gehäuse, und mit einer solchen Vorrichtung versehene Lichtbogenlöschkammer Expired - Lifetime EP0817223B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9608301A FR2750531B1 (fr) 1996-06-28 1996-06-28 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
FR9608301 1996-06-28

Publications (2)

Publication Number Publication Date
EP0817223A1 EP0817223A1 (de) 1998-01-07
EP0817223B1 true EP0817223B1 (de) 2002-05-08

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EP97410062A Expired - Lifetime EP0817223B1 (de) 1996-06-28 1997-06-13 Entionisierungsvorrichtung für Gase, insbesondere für Schaltgase in eine Lichtbogenlöschkammer eines Niederspannungslastschalters mit gegossenem Gehäuse, und mit einer solchen Vorrichtung versehene Lichtbogenlöschkammer

Country Status (8)

Country Link
US (1) US5889249A (de)
EP (1) EP0817223B1 (de)
KR (1) KR100441805B1 (de)
CN (1) CN1072832C (de)
DE (1) DE69712413T2 (de)
EA (1) EA000443B1 (de)
ES (1) ES2176649T3 (de)
FR (1) FR2750531B1 (de)

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CN106796851A (zh) * 2014-11-06 2017-05-31 伊顿电气Ip两合公司 包括开关气体冷却组件和颗粒捕获组件的系统
CN106876197A (zh) * 2015-12-10 2017-06-20 施耐德电器工业公司 包括改善的过滤猝灭气体的装置的多极空气隔断断路器
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EP3223292A1 (de) 2016-03-24 2017-09-27 Schneider Electric Industries SAS Elektrischer schutzschalter für unterbrechung in der luft, der eine verbesserte filtervorrichtung für das unterbrechungsgas umfasst

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DE102012110409A1 (de) 2012-10-31 2014-04-30 Eaton Electrical Ip Gmbh & Co. Kg Kühlvorrichtung für in Installationsgeräten auftretende Gase
US9761392B2 (en) 2013-03-06 2017-09-12 Eaton Electrical Ip Gmbh & Co. Kg Plate stack for a cooling device in installation devices
WO2015067462A1 (de) 2013-11-07 2015-05-14 Eaton Electrical Ip Gmbh & Co. Kg Herstellverfahren von plattenanordnungen und ihre verwendung
CN106796851A (zh) * 2014-11-06 2017-05-31 伊顿电气Ip两合公司 包括开关气体冷却组件和颗粒捕获组件的系统
CN106796851B (zh) * 2014-11-06 2019-03-29 伊顿电气Ip两合公司 包括开关气体冷却组件和颗粒捕获组件的系统
CN106876197A (zh) * 2015-12-10 2017-06-20 施耐德电器工业公司 包括改善的过滤猝灭气体的装置的多极空气隔断断路器
CN106876197B (zh) * 2015-12-10 2019-11-15 施耐德电器工业公司 包括改善的过滤猝灭气体的装置的多极空气隔断断路器
EP3223292A1 (de) 2016-03-24 2017-09-27 Schneider Electric Industries SAS Elektrischer schutzschalter für unterbrechung in der luft, der eine verbesserte filtervorrichtung für das unterbrechungsgas umfasst

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CN1169581A (zh) 1998-01-07
DE69712413T2 (de) 2002-11-21
CN1072832C (zh) 2001-10-10
FR2750531A1 (fr) 1998-01-02
EA199700069A1 (ru) 1997-12-30
EA000443B1 (ru) 1999-08-26
KR100441805B1 (ko) 2004-11-03
EP0817223A1 (de) 1998-01-07
ES2176649T3 (es) 2002-12-01
US5889249A (en) 1999-03-30
KR980005116A (ko) 1998-03-30
DE69712413D1 (de) 2002-06-13
FR2750531B1 (fr) 1998-08-07

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