EP3758037A1 - Elektrisches schaltgerät mit filtervorrichtung - Google Patents

Elektrisches schaltgerät mit filtervorrichtung Download PDF

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Publication number
EP3758037A1
EP3758037A1 EP20182178.2A EP20182178A EP3758037A1 EP 3758037 A1 EP3758037 A1 EP 3758037A1 EP 20182178 A EP20182178 A EP 20182178A EP 3758037 A1 EP3758037 A1 EP 3758037A1
Authority
EP
European Patent Office
Prior art keywords
filter
housing
outlet opening
filtering device
inlet openings
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.)
Pending
Application number
EP20182178.2A
Other languages
English (en)
French (fr)
Inventor
Marc Rival
Cyril DOMENECH
Jean-Paul Gonnet
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 Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3758037A1 publication Critical patent/EP3758037A1/de
Pending 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
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • 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
    • H01H9/346—Details concerning the arc formation chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/002—Venting with external pressure
    • H01H2213/004—Scavenger; Filter

Definitions

  • the present invention relates to an electrical switching device comprising a filtering device.
  • electrical electromechanical switching devices such as low voltage multipole circuit breakers, capable of interrupting an electric current of high intensity (for example, of high intensity. greater than or equal to 630 Amps).
  • These devices generally include filters intended to cool the cutoff gases generated when the electric current is interrupted.
  • these filters are integrated inside the interrupting chambers of the device. This allows the cut-off gases to be treated before they are evacuated from the appliance in order to avoid causing damage to the surrounding installations.
  • cutoff gases are generally electrically conductive when they are hot. If they are released out of the appliance without being filtered or cooled, they may present an electrical hazard to surrounding electrical installations.
  • the performance of the filtering device is improved compared to known filters integrated in the interrupting chambers.
  • the pressure of the cut-off gases leaving the exhaust ports is better balanced thanks to the common internal chamber.
  • the lateral arrangement of the outlet opening also makes it possible to direct the outgoing gas flow towards a specific area of the environment of the device, in particular to prevent them from being projected in an uncontrolled manner onto neighboring devices adjacent to the device. switching device.
  • the internal construction of the filtering device is in particular facilitated by the fact that the latter is arranged outside the housing of the switching device.
  • an electrical switching device 2 such as a low voltage power circuit breaker
  • device 2 is an air breaker or a molded case circuit breaker.
  • the circuit breaker rating (rated current In) is greater than or equal to 630 Amps.
  • the device 2 is a multipolar device.
  • the device 2 has three poles so as to be able to interrupt a three-phase electric current.
  • the number of poles can be different, for example equal to four.
  • the apparatus 2 comprises a housing 4 and a plurality of interrupting chambers formed inside the housing 4.
  • the housing 4 is made of an electrically insulating material, such as a thermosetting plastic or a thermoplastic.
  • the housing 4 is divided into several polar compartments each containing an interrupting chamber and a pair of separable electrical contacts associated with a phase of the electrical current and connected to connection terminals of the device 2.
  • Each interrupter chamber is configured to extinguish an electric arc liable to appear between the electric contacts when the latter are separated when the apparatus 2 switches to an electrically open state.
  • each interrupting chamber includes arc extinguishing means, such as a stack of metal plates intended to split an electric arc.
  • Each interrupting chamber also includes a gas exhaust port 10 which opens to the outside of the housing 4.
  • Each exhaust orifice 10 makes it possible to evacuate, to the outside of the housing 4, the interrupting gases generated in the gas chamber. arc breaking chamber.
  • the remainder of the housing 4 is advantageously impermeable to cutoff gases and the polar compartments are separated in a sealed manner from one another, so that the cutoff gases can normally only exit from the box 4 by passing through the exhaust ports 10.
  • the exhaust ports 10 are formed on an upper region of the housing 4.
  • the exhaust ports 10 can be located on an upper face of the housing 4.
  • the apparatus 2 also includes a filtering device 8, also called a filter cartridge, configured to filter the cutoff gases leaving the housing 4, in particular to cool and clean up these cutoff gases before they are released into the environment. around the device 2.
  • a filtering device 8 also called a filter cartridge
  • the filtering device 8 is advantageously placed outside the housing 4 and associated with the exhaust ports 10.
  • the device 2 is a withdrawable circuit breaker comprising a removable part formed by the housing 4 and a frame 6 which delimits a receiving volume in which the housing 4 is inserted in a removable manner.
  • the frame 6 is intended to be mounted on an electrical panel.
  • Housing 4 is configured to be reversibly inserted or removed from frame 6 by movement of translation. Electrical connectors integrated into the chassis 6 and at the rear of the box 4 provide an electrical connection between the terminals of the device 2 and the electrical panel when the box 4 is inserted into the chassis 6.
  • the filtering device 8 is fixed to the frame 6 facing the receiving volume, for example in an upper part of the frame 6, so as to overhang and be in contact with the exhaust ports 10 when the mobile part 4 is inserted in the frame 6.
  • the frame 6 comprises two side walls arranged vertically on either side of the receiving volume and the filtering device 8 is fixed perpendicularly to these two side walls above the receiving volume.
  • the device 2 is not necessarily withdrawable.
  • the frame 6 is omitted and the device 2 is configured so that the box 4 can be mounted directly on an electrical panel.
  • the embodiments of the filtering device 8 described below can be transposed to such devices 2.
  • FIG. 8 An example of the filtering device 8 is shown in the figures 2 , 3 and 4 .
  • the filtering device 8 comprises a hollow body delimited by outer walls.
  • the body is made of an electrically insulating material, such as a thermosetting plastic.
  • the reference X8 represents a longitudinal axis of the filtering device 8.
  • the filtering device 8 has an elongated shape extending essentially along the longitudinal axis X8.
  • the filtering device 8 may have an essentially rectangular shape, as in the example illustrated, or else, according to one variant among others, have an essentially cylindrical shape.
  • the filtering device 8 comprises an upper region 20, a lower region 22 as well as a first lateral end region 24 and a second lateral end region 26 facing each other. another along the longitudinal axis X8.
  • said regions 20, 22, 24 and 26 may be in the form of substantially planar faces.
  • the side faces 24 and 26 are perpendicular to the longitudinal axis X8.
  • the filter device 8 has a plurality of inlet openings 28 located on the lower region 22.
  • Each inlet opening 28 is configured to fluidly cooperate with one of said exhaust ports 10 formed on the housing 4 of the device 2, in particular to allow the cut-off gases leaving the exhaust ports 10 to enter the device. filter 8.
  • the number of inlet openings 28 is adapted as a function of the number of exhaust ports 10, and therefore as a function of the number of poles of the device 2.
  • the filtering device 8 has three inlet openings 28 each intended to be associated with one of the exhaust ports 10.
  • an inlet opening 28 is aligned and in contact with an exhaust port 10 to allow the entry of the cut-off gas into the filtering device 8 while limiting gas leaks towards. the exterior of the housing 4 and the filtering device 8.
  • the lower region 22 faces the upper part of the housing 4 on which the exhaust ports 10 are arranged.
  • the inlet openings 28 are aligned with the orifices. exhaust 10, or even preferably in contact with the exhaust openings 10.
  • the dimensions of the inlet openings 28 are similar to the dimensions of the exhaust ports 10.
  • the filtering device 8 also comprises an outlet opening 36 placed on one of the lateral regions, for example on the second lateral region 26.
  • This outlet opening 36 is in fluid communication with the inlet openings 28 by a common internal chamber of the filtering device 8, bearing the reference V8 on the figure 4 .
  • the chamber V8 is delimited by the walls of the body of the filtering device 8.
  • the filtering device 8 is configured so that the cut-off gases, once entered into the filtering device 8, can only leave it through the outlet opening 36.
  • the other side region 24 is of preferably without an exit opening.
  • the ratio between, on the one hand, the section of the outlet opening 36 and, on the other hand, the total section of the inlet openings 28 is greater than or equal to 0.5 or advantageously, greater than or equal to 1.
  • the outlet opening 36 can be divided into a plurality of orifices of different shape, dimensions or arrangement.
  • the outlet opening 36 is extended by a portion of the body of the filtering device 36 which comprises two circular orifices 30 and a main orifice 32 of rectangular section.
  • the orifices 30 are arranged in the extension of the outlet opening 36.
  • the orifice 32 is located under the orifices 30, at the end of a bent portion extending from the filtering device 36. This configuration is not not necessarily limiting and, alternatively, other configurations can be used.
  • the inlet openings 28 can be separated in pairs by low walls 34 which protrude towards the interior of the chamber V8 from the wall of the body on which the openings 28 are formed.
  • these low walls 34 do not extend to the wall of the upper region 20, so as not to completely isolate one or more of the openings 28 from the rest of the chamber V8.
  • the walls 34 can even be omitted.
  • the filtering device 8 further comprises a filter 40 disposed inside the internal chamber between the inlet openings 28 and the outlet opening 36.
  • the filter 40 preferably occupies the entire longitudinal section of the chamber V8, so that the cut-off gas entering through the openings 28 must pass through the filter 40 to reach the outlet opening 36.
  • the filter 40 has a planar shape.
  • the filter 40 is inclined inside the chamber V8.
  • the filter 40 has a first longitudinal end 42 and a second longitudinal end 44 between which the filter 40 extends longitudinally.
  • the first end 42 contacts an inner wall of the side region 24.
  • the second end 44 contacts an inner wall of the opposite side region 26 below the outlet opening 36.
  • the end 42 is higher than the end 44.
  • the second end 44 can be placed on the lower part of the outlet opening 36.
  • the filter 40 extends essentially along the longitudinal axis X8 while exhibiting a downward sloping inclination from the lateral region 24 towards the lateral region 26.
  • the angle of inclination of the filter 40 relative to a horizontal plane is greater than or equal to 15 ° and, preferably, greater than or equal to 25 °.
  • the longitudinal axis X8 is aligned horizontally.
  • the walls 34 do not extend as far as the filter 40 and are not in contact with the filter 40, so as to allow an exchange of gas between the different volumes emerging from each opening 28.
  • the upper end of the walls 34 is kept at a non-zero distance from the lower face of the filter 40, as clearly visible on the figure 4 .
  • the filter 40 comprises a stack of flat or essentially flat layers.
  • the filter 40 is made of a filter material such as a porous material or a woven wire cloth or a metal foam, or any other suitable material.
  • woven wire cloths are reps-type metal fabrics.
  • the metal foam can be nickel foam.
  • the filter 40 comprises several superimposed layers
  • said layers can be in any of these materials.
  • Such layers preferably have an essentially equal surface area.
  • the filter 40 comprises a woven metal fabric associated with a layer of nickel metal foam.
  • the thickness of the metal foam layer can be between 0.3mm and 1cm and, for example, equal to 5mm.
  • the filter 40 can be fixed on the internal walls of the filtering device 8 or on the grooves of the filtering device 8, whether by gluing, or by welding, or by means of fixing members such as screws, bolts or rivets.
  • the filtering device 8 may include fasteners, not shown, to secure the filtering device to the housing 4 of the apparatus 2.
  • the fasteners can include one or more hooks, such as deformable hooks or tilting hooks, or one or more fasteners such as screws or bolts.
  • Such fastening elements can be omitted when the circuit breaker 2 is withdrawable and the filtering device 8 is mounted on the frame 6, since the filtering device 8 does not then need to be mounted on the box 4.
  • the performance of the filtering device 8 is improved compared to known devices in which filters are integrated directly into the housing of the device and which are each associated with a single interrupting chamber.
  • the pressure of the cut-off gases leaving the exhaust ports 10 is better balanced before passing through the filter 40.
  • the filtering device 8 then tends to better withstand the gas pressure wave of cut when they come out of the exhaust ports 10.
  • the junction between the housing 4 and the filtering device 8 can be established simply without it being essential to resort to complex fixing means. aimed at ensuring a perfect seal between the exhaust ports 10 and the inlet openings 28.
  • the lateral arrangement of the outlet opening 36 also makes it possible to direct the outgoing gas flow towards a specific area of the environment of the device, in particular to prevent this gas flow from being projected uncontrollably onto the device. neighboring devices adjacent to the switching device.
  • the internal construction of the filtering device 8 is in particular facilitated by the fact that the latter is placed outside the housing 4 of the device 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP20182178.2A 2019-06-26 2020-06-25 Elektrisches schaltgerät mit filtervorrichtung Pending EP3758037A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1906952A FR3098008A1 (fr) 2019-06-26 2019-06-26 Appareil électrique de commutation comportant un dispositif de filtrage

Publications (1)

Publication Number Publication Date
EP3758037A1 true EP3758037A1 (de) 2020-12-30

Family

ID=68138459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20182178.2A Pending EP3758037A1 (de) 2019-06-26 2020-06-25 Elektrisches schaltgerät mit filtervorrichtung

Country Status (5)

Country Link
US (1) US11270857B2 (de)
EP (1) EP3758037A1 (de)
KR (1) KR20210001978A (de)
CN (1) CN112151316B (de)
FR (1) FR3098008A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977354B1 (en) * 2004-11-03 2005-12-20 Eaton Corporation Arc hood and power distribution system including the same
US20120120558A1 (en) * 2010-11-15 2012-05-17 Schneider Electric USA, Inc. Circuit breaker with controlled exhaust
DE102017207786A1 (de) * 2017-05-09 2018-11-15 Siemens Aktiengesellschaft Ausblasfilter für einen elektrischen Schalter und elektrischer Schalter

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621169A (en) * 1970-04-20 1971-11-16 Gen Electric Electric circuit interrupter with novel arc gas discharge muffle assembly
DE3900973C1 (en) * 1989-01-14 1990-06-13 Heinz Dipl.-Ing. 4390 Gladbeck De Hoelter Filter unit with progressively responding warning and extinguishing device
FR2655770B1 (fr) * 1989-12-11 1995-10-20 Merlin Gerin Disjoncteur multipolaire a filtre des gaz commun aux differents poles.
DE20215343U1 (de) * 2002-09-30 2003-01-30 Siemens AG, 80333 München Anordnung mit einem Niederspannungs-Leistungsschalter und einem mit einem Trageelement versehenen Schaltgasdämpfer für den Niederspannungs-Leistungsschalter
FR2879016B1 (fr) * 2004-12-06 2007-02-09 Schneider Electric Ind Sas Dispositif electrique de coupure avec recyclage des gaz de coupure
US7488915B2 (en) * 2006-09-20 2009-02-10 Eaton Corporation ARC baffle, and ARC chute assembly and electrical switching apparatus employing the same
US7910845B2 (en) * 2007-05-04 2011-03-22 Eaton Corporation Removable racking system for an electrical switching apparatus
US7598833B1 (en) * 2008-07-30 2009-10-06 Eaton Corporation Electrical switching apparatus, and arc chute assembly and arc hood assembly therefor
BR112012006182B1 (pt) * 2009-09-18 2019-10-22 Schneider Electric Ind Sas dispositivo de corte tendo pelo menos um bloco de corte unipolar, comportando uma ponte de contatos e disjuntor, comportando esse dispositivo
US8525054B2 (en) * 2010-12-17 2013-09-03 General Electric Schenectady Discharge mechanism for circuit breaker
CN102129924B (zh) * 2011-04-02 2013-01-02 常熟开关制造有限公司(原常熟开关厂） 断路器灭弧室结构
FR3005781B1 (fr) * 2013-05-17 2016-09-23 Schneider Electric Ind Sas Chambre de coupure pour un appareil de protection electrique et appareil de protection electrique la comportant.
FR3045205B1 (fr) * 2015-12-10 2018-01-26 Schneider Electric Industries Sas Disjoncteur multipolaire a coupure dans l'air comportant un dispositif de filtrage du gaz de coupure ameliore
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977354B1 (en) * 2004-11-03 2005-12-20 Eaton Corporation Arc hood and power distribution system including the same
US20120120558A1 (en) * 2010-11-15 2012-05-17 Schneider Electric USA, Inc. Circuit breaker with controlled exhaust
DE102017207786A1 (de) * 2017-05-09 2018-11-15 Siemens Aktiengesellschaft Ausblasfilter für einen elektrischen Schalter und elektrischer Schalter

Also Published As

Publication number Publication date
RU2020120709A (ru) 2021-12-23
FR3098008A1 (fr) 2021-01-01
CN112151316A (zh) 2020-12-29
CN112151316B (zh) 2024-04-12
US11270857B2 (en) 2022-03-08
US20200411263A1 (en) 2020-12-31
KR20210001978A (ko) 2021-01-06

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