EP1251533A1 - Integraler Diffusor für ein elektrisches Schaltgerät - Google Patents

Integraler Diffusor für ein elektrisches Schaltgerät Download PDF

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Publication number
EP1251533A1
EP1251533A1 EP02354030A EP02354030A EP1251533A1 EP 1251533 A1 EP1251533 A1 EP 1251533A1 EP 02354030 A EP02354030 A EP 02354030A EP 02354030 A EP02354030 A EP 02354030A EP 1251533 A1 EP1251533 A1 EP 1251533A1
Authority
EP
European Patent Office
Prior art keywords
face
posterior
anterior
cavity
passage
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
EP02354030A
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English (en)
French (fr)
Other versions
EP1251533B1 (de
Inventor
Jeremy Dorn
Alain Gerbert-Gaillard
Pascale Petit
Marc Rival
Claude Rubbo
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
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1251533A1 publication Critical patent/EP1251533A1/de
Application granted granted Critical
Publication of EP1251533B1 publication Critical patent/EP1251533B1/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
    • H01H9/342—Venting arrangements for arc chutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor

Definitions

  • the invention relates to an electrical switchgear comprising a arc extinguishing chamber provided with an opening opening towards the outside, and with a diffuser intended to limit external manifestations through the orifice of the chamber, during cutting the electric current.
  • Document FR 2 589 624 describes an arc extinguishing chamber extractable for a low-voltage power circuit breaker pole.
  • This extractable chamber has a support structure of insulating synthetic material formed by two pieces. These two pieces form side cheeks between which are positioned metal room dividers. They also form two half-plates complementary to close the chamber on the side opposite the contacts, these half-plates being provided with slots allowing the evacuation of gases towards the outside of the chamber. The cut-off gases, on passing through the discharge slots, are partially cooled.
  • an arc extinguishing chamber for a low voltage circuit breaker comprising a porous screen composed of a weaving of wires metallic objects intended to cool the breaking gases leaving towards the outside environment.
  • a screen insulation with regular perforation is interposed between the metallic porous screen and inside the room.
  • This insulating screen is intended to prevent the arc from looping back on the metallic elements of the filter.
  • the insulating screen is sometimes insufficient for to prevent the risks of looping back of the arc, in particular for low voltage circuit breakers of power with very high breaking capacity.
  • the invention therefore aims to remedy the drawbacks of the state of the art, so as to propose a diffuser forming an effective screen against looping of the arc electric. More particularly, the invention aims to propose such a diffuser which is very simple to manufacture and assemble and which is also very rigid and very robust mechanically, so as to resist the extreme pressure wave caused by the arc during the cut. It also aims to offer a broadcaster whose opening is precisely calibrated.
  • the arrangement of the anterior and posterior cavities and of the lights imposes on the breaking gas a zigzag path, with two 90 ° changes of direction, which contributes to causing a significant pressure drop when the diffuser passes.
  • anterior cavity and the posterior cavity have their first wall side located in the same geometric plane, it is possible to produce the part by simple molding, from a two-part mold: an anterior part of the mold is provided with an anterior tooth to make the anterior cavity, and a posterior part of the mold is provided with a posterior tooth to make the posterior cavity.
  • an anterior part of the mold is provided with an anterior tooth to make the anterior cavity
  • a posterior part of the mold is provided with a posterior tooth to make the posterior cavity.
  • partitions gives the room great rigidity and avoids any risk rupture of the diffuser when subjected to the pressure wave caused by the arc during the cut.
  • the invention naturally makes it possible to provide a multiplicity of planes of passage, and for each of the passage plans, a multiplicity of separate cavities two two by partitions as defined above.
  • the invention thus allows to enlarge at will the global crossing area which is the sum of the crossing areas of all the lights, without requiring an enlargement of each light. Gold the arc is all the better stopped by the diffuser as the passage lights of the diffuser are small.
  • the diffuser according to the invention is therefore particularly effective for confining the arc inside the chamber and prevent any looping of arcs from outside the chamber. It therefore makes it possible to have a metal filter if necessary at a short distance from the diffuser, on the outside of the room.
  • the reference to an “anterior” face and to a face “Posterior” is purely arbitrary, in the sense that the diffuser can be mounted in a room frame, either with its front face arranged on the side of the room, or with its rear face arranged on the side of the chamber.
  • the first lateral face of the first anterior cavity and the first side face of the second anterior cavity are connected to the second face lateral of the first anterior cavity and the second lateral face of the second cavity anterior via the anterior partition wall.
  • the first side lateral of the first posterior cavity and the first lateral face of the second cavity posterior are connected to the second lateral face of the first posterior cavity and to the second lateral face of the second posterior cavity by means of the partition posterior separation.
  • the anterior partition wall has an anterior rim oriented towards the anterior face and set back with respect to the anterior face.
  • the cleavage gases can bring conductive particles or ionized on the surface of the diffuser during cutting, and in particular on the edges of partition walls. It is therefore important that these edges do not protrude towards inside the room.
  • the anterior partition separates in addition a first inclined pan connecting the anterior rim to the bottom of the first anterior cavity and a second inclined face connecting the front edge to the bottom of the second front cavity. the front edge.
  • the inclination directs the gases towards the passage light.
  • the number of cavities can thus be maximized for a given dimension of the anterior face.
  • the number of lights, and the resulting overall passage section for gases, are then more important for given external dimensions of the diffuser.
  • the first geometric passage plane is perpendicular to the anterior face.
  • the first geometric passage plane is perpendicular to the posterior face.
  • the front side and the back side are flat.
  • the invention also relates to an arc extinguishing chamber for an apparatus electric cut-off, comprising a wall forming a frame delimiting a window said window being provided with a one-piece diffuser as described previously.
  • the metal filter can then be placed at a short distance from the diffuser, because the latter greatly reduces the risk of looping back the electric arc.
  • the circuit breaker in its together then becomes more compact.
  • a low voltage circuit breaker 10 has, inside a molded case 12 of synthetic material, a drive mechanism 14 and one or several breaking poles, each pole comprising a fixed contact 18, a movable contact 20 driven by the drive mechanism 12 and an arc extinguishing chamber 22 arranged opposite the contacts 18, 20.
  • Chamber 22 visible in detail in FIG. 2, constitutes a sub-assembly autonomous, with two side walls 24, 26 facing each other and a wall rear 28 disposed opposite the contacts 18, 20.
  • the rear wall 28 includes a window 30 for discharging the cut-off gases. This window 30 opens either directly on the outside, either on an intermediate expansion and gas filtering chamber.
  • the walls 24, 26 are fixed to each other using two metal cheeks 32, 34 which wedge between them the rear wall 28 and are fixed on a return of the walls side 24, 26 of the chamber using four fixing screws 36.
  • the cheeks 32, 34 also allow the positioning of the arc extinguishing chamber 22 in the housing 12 of the circuit breaker, and its fixing using fixing screws 38.
  • Chamber 22 is provided with metal separators 40 and an arc horn upper 42 (FIG. 1), one curved end of which faces the movable contact 20 when the latter is in the open position.
  • a lower bow horn 44 is arranged in the case 12 and completes the room.
  • a metal filter 46 In the window 30 of the rear wall 28 of the arc extinguishing chamber is disposed a metal filter 46.
  • a diffuser screen 50 of synthetic material is also arranged in the window 30, wedged between the separators 40 and the metal filter 46.
  • the metal filter 46 is at a short distance from the screen, almost attached to it.
  • the diffuser 50 is visible in detail in Figures 3 to 11. It consists of a unique piece of thermosetting plastic, in this case polyester material loaded with 12% fiberglass.
  • the part 50 has a general form of plate, with a face flat front 52 and a flat rear face 54. The faces 52 and 54 are parallel. In the thickness of the plate are formed interconnected cavities. Some of these cavities open on the anterior face 52, the others on the posterior face 54. For the remainder of the description, a first lateral side of the plate will be distinguished, in the occurrence, the left side in FIG. 4, and a second lateral side of the plate, in the occurrence on the right side in Figure 4.
  • anterior cavities are aligned in rows 60, 160 of ten previous cavities.
  • Each row 60, resp. 160 cavities anterior is framed laterally by a first geometric passage plane 64, resp. 164, perpendicular to the plane of the anterior face and located on the first lateral side of the plate, and by a second geometrical plane of passage 66, resp. 166, parallel to the first geometrical plane of passage and located on the second lateral side of the plate.
  • Two cavities neighbors 62a, 62b of the same row 60 are separated from each other by a partition of separation 68.
  • Each anterior cavity 62a, 62b has a solid bottom 70a, 70b, a first flat lateral face 72a, 72b (FIG.
  • first geometric plane of passage 64 in the first geometric plane of passage 64, a second flat lateral face 74a, 74b (FIG. 9) in the second plane passage geometry 66, and two inclined faces 76a, 78a, 76b, 78b belonging to dividing walls 68.
  • the distance between the first plane 64 and the second plane 66 of a given row 60 thus defines the width of the anterior cavities 62a, 62b of the row.
  • Each row 60 of anterior cavities corresponds to at least one first row 80 of posterior cavities 82a, 82b.
  • the first geometric plan of passage 64 of the row 60 of anterior cavities 62a, 62b considered is located between this row 60 of anterior cavities and the first row 80 of corresponding posterior cavities.
  • the posterior cavities 82a, 82b constituting a row of posterior cavities 80 are identical, in their form and their arrangement, in the anterior cavities 62a, 62b.
  • Two neighboring cavities 82a, 82b of a same row 80 are separated from each other by a partition 88.
  • Each cavity 82a, 82b has a solid bottom 90a, 90b, a first flat lateral face 92a, 92b located in the first geometric plane of the corresponding anterior row, a second flat lateral face 94a, 94b, and two inclined faces 96a, 98a, 96b, 98b belonging to partition walls 88.
  • Each anterior cavity 62a, 62b of the anterior row considered corresponds a posterior cavity 82a, 82b of the first row of posterior cavities corresponding, the two cavities 62a, 62b, resp. 82a, 82b being located on either side of the first passage plan 64 of the anterior cavity.
  • the depth of the anterior cavity 62a, 62b and that of the first corresponding posterior cavity 82a, 82b are such that the two lateral partitions 72a, 92a which are in the first geometric passage plane 64 are interrupted and that a first light 100a, 100b of communication between the two cavities is open in the first geometrical plane of passage 64.
  • This light is delimited by the edges of the inclined faces 76a, 78a, 76b, 78b of the anterior cavity and those 96a, 98a, 96b, 98b, of the first corresponding posterior cavity, in the foreground geometric passage as well as by the edge of the bottom of the cavities 70a, 70b, 90a, 90b.
  • This first lumen 100a, 100b provides a passage between the anterior cavity 62a, 62b and the first corresponding posterior cavity 82a, 82b.
  • the row of anterior cavities bordering the side edge of the plate located on the second lateral side of the plate is distinguished from the other rows of anterior cavities by the fact that its anterior cavities have a second flat side face without light.
  • Each of the other rows 60 of previous cavities corresponds, in addition to the first row 80 of posterior cavities already described, a second row 180 of posterior cavities, visible in particular in FIG. 11, the row of anterior cavities considered 60 and the corresponding second row of posterior cavities 180 being located on either side of the second geometric passage plane 66 of row 60 of anterior cavities considered.
  • Each anterior cavity 62a, 62b is located in correspondence with a posterior cavity 182a, 182b of the second row 180 of corresponding posterior cavities, the anterior cavity 62a, 62b and the posterior cavity 182a, 182b being located on either side of the second geometric passage plane 66 of the anterior cavity.
  • the second row of posterior cavities 180 is in all points similar to the first row of posterior cavities 80, so that to designate the different elements of the cavities 182a, 182b of the second row of posterior cavities 180, we used signs of references deduced from similar elements of the first posterior row 80 by adding 100.
  • the depth of the anterior cavity 62a, 62b and that of the corresponding second posterior cavity 182a, 182b are such that the two side partitions 74a, 74b, resp. 194a, 194b which are in the second geometric plane passage 66 are interrupted and a communication light 140a, 140b between the two cavities 62a, 62b, resp. 182a, 182b is open in the second geometric plane of passage 66.
  • This second light 140a, 140b is delimited by the edges of the sides inclined from the anterior cavity 76a, 78a, resp. 76b, 78b and the edges of inclined faces 196a, 198a, resp. 196b, 198b of the corresponding second posterior cavity as well as by the bottom edges 70a, 70b, 190a, 190b of the cavities concerned, in the second plane geometric passage.
  • This second light 140a, 140b provides a passage between the anterior cavity 62a, resp. 62b and the corresponding second posterior cavity 182a, 182b.
  • the cavities 182a, 182b of the second posterior row 180 are also in communication with corresponding cavities of a second row of anterior cavities 160, identical to row 60, in the same way as the cavities of the first posterior row 80 are in communication with the cavities of the first front row. So, step by step, all the cavities located along the same passage axis 150a, 150b perpendicular to the geometric passage planes are connected between them and define a line of interconnected cavities.
  • the row of posterior cavities bordering the lateral edge of the plate located on the first lateral side of the plate is distinguished from the other rows of posterior cavities by the fact that its posterior cavities have a second side face without light.
  • the distance between the first geometric passage plane 64 of a row given anterior and the first geometric passage plane 164 of the anterior row adjacent gives the pitch of the structure.
  • this step is equal to double the width of row 64 because the rear rows are the same width as that of the previous rows.
  • the diffuser has a geometric center of symmetry located at its center of gravity, so that the description of the rows of posterior cavities could be deduced completely from that of the previous rows. This provision makes the very simple subsequent mounting of the plate.
  • This band of material has a flat posterior face, which constitutes a part of the posterior face 54 of the Streamer. It has a first flat lateral face in the first geometric plane passage, constituted by all of the first side faces 92a, 92b of the first posterior cavities corresponding to the anterior cavities observed.
  • the strip of matter also has a second planar lateral face in the second geometric plane of passage 66 and constituted by all of the second lateral faces 196a, 196b of the second posterior cavities corresponding to the anterior cavities observed.
  • the partition walls 88 of the posterior cavities which correspond to row 60 of observed anterior cavities extend perpendicular to the band of material and other of it. There is continuity of material between the strip and the adjoining partitions 88.
  • the strip thus described is replicated step by step in step with the structure, so what is constituted on the posterior face a kind of grid made up of strips of successive materials, parallel to each other, and connected by adjoining partitions which form bridges of material in continuity with the adjacent strips.
  • the diffuser has no direct communication hole between the face anterior 52 and the posterior face 56, of axis perpendicular to the anterior faces and later. In other words, it is not possible to define a path of non-zero thickness, parallel to the passage planes 64, 66 and crossing right through the Streamer. To take a picture, it will not be possible to insert a needle parallel to a passage plane, so that it leads both to the face anterior on the posterior surface.
  • the diffuser thus constitutes a major obstacle for the electric arc which seeks to find a position of curvature minimal.
  • the gases can freely circulate perpendicular to the planes of passage, in the same line of cavities connected by the passage lights.
  • the loss of load on passage of the diffuser can be controlled by adequately dimensioning passing lights.
  • the part constituting the diffuser can be obtained without difficulty by molding in compression in a heated mold shown in Figure 12 and composed of a matrix anterior 200 provided with rows 202 of teeth 204 corresponding to the cavities of the face anterior, and a posterior matrix 210 provided with rows 212 of teeth 214 corresponding to the cavities of the posterior surface.
  • Each tooth 204, 214 has two flat and parallel side faces 206, 208, resp. 216, 218.
  • Thermosetting material is introduced into one of the two dies then the mold is closed using a press acting on the other matrix.
  • the teeth of the posterior matrix 210 come into contact with the teeth of the anterior matrix at level of the flat side faces as shown in section in Figure 13, thus forming the diffuser lights.
  • the heat of the mold allows the hardening of the material thermosetting of the diffuser.
  • the posterior cavities are not necessarily completely identical to the anterior cavities. Their width in particular may be different, which leads to defining a not equal to the sum of the width of a previous row and the width of a row later.
  • each anterior cavity has only one single corresponding posterior cavity.
  • each cavity has only one light.
  • the diffuser is not necessarily flat.
  • the anterior and posterior faces can be curved, to conform to the shape of the arc extinguishing chamber. he nor is it necessary for the passage planes to be perpendicular to the faces anterior and posterior.

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  • Prostheses (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP02354030A 2001-04-19 2002-02-20 Integraler Diffusor für ein elektrisches Schaltgerät Expired - Lifetime EP1251533B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0105283 2001-04-19
FR0105283A FR2823904B1 (fr) 2001-04-19 2001-04-19 Diffuseur monobloc pour un appareillage electrique de coupure

Publications (2)

Publication Number Publication Date
EP1251533A1 true EP1251533A1 (de) 2002-10-23
EP1251533B1 EP1251533B1 (de) 2010-01-20

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Family Applications (1)

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EP02354030A Expired - Lifetime EP1251533B1 (de) 2001-04-19 2002-02-20 Integraler Diffusor für ein elektrisches Schaltgerät

Country Status (4)

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EP (1) EP1251533B1 (de)
DE (1) DE60235135D1 (de)
ES (1) ES2336195T3 (de)
FR (1) FR2823904B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655749A1 (de) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Kontaktpastille für einen beweglichen elektrischen Kontakt eines Schutzschalters, beweglicher elektrischer Kontakt mit einer solchen Pastille und Schutzschalter mit einem solchen Kontakt
CN103426670A (zh) * 2013-09-02 2013-12-04 浙江大华开关厂 一种断路器触头灭弧系统
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088489A (en) * 1934-03-16 1937-07-27 Westinghouse Electric & Mfg Co Circuit interrupter
DE9115905U1 (de) * 1991-12-21 1993-04-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
US5756951A (en) * 1994-03-21 1998-05-26 Siemens Aktiengesellschaft Arc chute having three barriers for the passage of arc gasses

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088489A (en) * 1934-03-16 1937-07-27 Westinghouse Electric & Mfg Co Circuit interrupter
DE9115905U1 (de) * 1991-12-21 1993-04-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
US5756951A (en) * 1994-03-21 1998-05-26 Siemens Aktiengesellschaft Arc chute having three barriers for the passage of arc gasses

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655749A1 (de) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Kontaktpastille für einen beweglichen elektrischen Kontakt eines Schutzschalters, beweglicher elektrischer Kontakt mit einer solchen Pastille und Schutzschalter mit einem solchen Kontakt
US7598832B2 (en) 2004-11-08 2009-10-06 Schneider Elecric Industries Sas Contact pad designed for a movable electrical contact of a circuit breaker, movable electrical contact having such a pad and circuit breaker comprising such a contact
CN103426670A (zh) * 2013-09-02 2013-12-04 浙江大华开关厂 一种断路器触头灭弧系统
CN103426670B (zh) * 2013-09-02 2015-06-24 浙江大华电气有限公司 一种断路器触头灭弧系统
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
US10020143B2 (en) 2016-03-24 2018-07-10 Schneider Electric Industries Sas Electrical apparatus for breaking an electric current in air comprising an improved extinguishing gas filtering device
RU2719403C2 (ru) * 2016-03-24 2020-04-17 Шнейдер Электрик Эндюстри Сас Электрическое устройство для прерывания электрического тока в воздушной среде, содержащее усовершенствованное устройство фильтрации гасящих газов

Also Published As

Publication number Publication date
FR2823904A1 (fr) 2002-10-25
FR2823904B1 (fr) 2003-06-06
EP1251533B1 (de) 2010-01-20
DE60235135D1 (de) 2010-03-11
ES2336195T3 (es) 2010-04-09

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