EP2478539B1 - Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif - Google Patents

Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif Download PDF

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Publication number
EP2478539B1
EP2478539B1 EP10762947.9A EP10762947A EP2478539B1 EP 2478539 B1 EP2478539 B1 EP 2478539B1 EP 10762947 A EP10762947 A EP 10762947A EP 2478539 B1 EP2478539 B1 EP 2478539B1
Authority
EP
European Patent Office
Prior art keywords
switching device
channel
gases
extinguishing
contact bridge
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.)
Active
Application number
EP10762947.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2478539A2 (fr
Inventor
Marc Rival
Christophe Grumel
Hervé ANGLADE
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
Priority claimed from FR0904457A external-priority patent/FR2950474B1/fr
Priority claimed from FR0904455A external-priority patent/FR2950473B1/fr
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Priority to PL10762947T priority Critical patent/PL2478539T3/pl
Publication of EP2478539A2 publication Critical patent/EP2478539A2/fr
Application granted granted Critical
Publication of EP2478539B1 publication Critical patent/EP2478539B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker

Definitions

  • the invention relates to a cut-off device having at least one unipolar breaking block.
  • Said block comprises a movable contact bridge, a pair of fixed contacts cooperating with said movable contact bridge and respectively connected to a current supply conductor.
  • Said block comprises two arc cutting chambers respectively opening on an opening volume of the contact bridge.
  • the invention also relates to a circuit breaker comprising a cut-off device.
  • Discharge gas evacuation in an electrical switchgear device is generally carried out by directly placing a drain hole on a rear face of the arc-cutting chamber.
  • the gases generated at the time of the cut through the breaking chamber pass and cool in contact with one or more deionization fins and are discharged at the bottom of the arc cutting chamber through an opening.
  • a grid preferably associated with additional filtering means allows the evacuation of gases outside the cutoff apparatus while stopping a large number of molten metal particles.
  • the gases remaining strongly ionized are very polluting. This pollution can particularly deteriorate the electronic means of triggering the switchgear when they are placed near the discharge grid of an arc extension chamber.
  • electrical rebooting phenomena during the break can be observed.
  • the invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a cut-off device comprising effective means for evacuating the cutoff gases.
  • Each cut-off chamber of the breaking device according to the invention is connected to at least one exhaust channel of the cutoff gases, said exhaust channels being opening on an upstream face of the casing of the cutoff block, said upstream face being positioned in contrast to another downstream face intended to be placed in contact with triggering means.
  • said exhaust gas exhaust channels meet in a common conduit opening on the upstream face of the case of the cutoff unit.
  • the exhaust channels of the cutoff gas respectively of a first and second breaking chamber are of different length, the cutoff gases flowing in a first exhaust gas channel being intended to suck by the Venturi effect the gases flowing in a second channel.
  • each arc breaking chamber comprises a stack of at least two deionization vanes separated from each other by a gas exchange space, at least one exchange space being connected to a channel of diffusion. exhaust gas cutoff.
  • said at least one gas escape channel of an arc cutting chamber passes through at least one decompression chamber comprising at least one wall covered with a metal sheet.
  • the decompression chamber is positioned under a lower wall of the arc extension chamber, the wall covered by the metal sheet being in a plane forming an angle of between 45 ° and 140 ° relative to the direction of the arc. flow of gases.
  • the wall covered by the metal sheet is in a plane perpendicular to the direction of the gas flow.
  • a gas exhaust channel comprises a rotary valve intended to be rotated by the passage of the cutoff gases, the rotation of the valve from a first position to a second position being intended to actuate triggering means to cause the clogging. opening of the contacts of the cut-off device.
  • the movable contact bridge is rotatable and is positioned in a rotary bar having a transverse housing orifice of said contact bridge, which protrudes on either side of the bar, said rotary bar being interposed between two side faces of the casing of the cutoff block, two sealing flanges being placed respectively between the radial faces of the rotary bar and the side faces to ensure a seal between the inside and outside of the cutoff block.
  • the rotary bar comprises at least one directly connected channel between the transverse housing orifice and a radial face so that the cutoff gases can flow directly via said channel to at least one sealing flange in order to push against one of the side faces for ensure a seal.
  • said channel is opening and passes on either side of the rotary bar from a first to a second radial face, said channel opening having a longitudinal axis parallel to a longitudinal axis of the rotary bar.
  • the opening channel comprises a longitudinal axis aligned with a longitudinal axis of the rotary bar so that the cutoff gases can exert a force to push substantially aligned with the longitudinal axis of the bar and evenly distributed over the sealing flanges. .
  • the sealing flanges comprise lateral cheeks at least partially covering the longitudinal surface of the rotary bar to partially close the transverse housing hole of the bar.
  • the movable contact bridge is rotatable between an open position and a closed position of the contacts in a clockwise direction.
  • the invention relates to a circuit breaker comprising a cut-off device as defined above.
  • Said circuit breaker comprises a trigger connected to the downstream ranges of the breaking device.
  • the switchgear 100 generally a circuit breaker comprises a trigger 7 associated with a cutoff device 600.
  • the breaking device 600 comprises at least one unipolar breaking block 10.
  • the unipolar breaking block is connected on the one hand to the trigger 7 at the downstream range 5 and on the other hand to a current line to be protected at the an upstream range 4.
  • the unipolar cutoff block 10 is also called a light bulb.
  • the cutoff device 600 comprises three unipolar breaking blocks.
  • the switching device 100 is then a three-pole circuit breaker.
  • the switchgear could be a uni circuit breaker, bi or four-pole.
  • the elements making up the switching apparatus 100 will be described in relation to the use position in which the circuit breaker 100 is placed in a table, with the nose 9 comprising a vertical handle and parallel to the mounting wall, the upstream connection pads 4 on the power line located at the top and forming the face upper 74 of the cut-off device 100 and the trigger 7 at the bottom.
  • the handle is intended to control an actuating mechanism 8 of the electrical contacts.
  • Each unipolar break block 10 allows the breaking of a single pole.
  • Said block is advantageously in the form of a flat housing 12 of molded plastic, with two large parallel faces 14 distant of a thickness e.
  • the thickness e is of the order of 23 mm for a 160 A caliber.
  • the housing 12 is formed of two parts, preferably mirror symmetrical, secured to one another on their large face 14 by any suitable means. As illustrated in a preferred embodiment in figure 3 , a complementary tenon / mortise type system allows the adjustment of the housing portions 12 one on the other, one of the two parts (not shown) comprising lugs adapted to penetrate recesses of the other. Arrangements 18 are also made to allow the juxtaposition of the housings 12 of unipolar block 10 and their connection to a multipole circuit breaker 100.
  • the unipolar breaking block comprises a breaking mechanism 20 housed in the housing 12.
  • the cutting mechanism 20 is preferably double rotary cut.
  • the switching device 100 according to the invention is particularly intended for applications up to 630 A and in some applications up to 800 A, for which the simple cut may not be sufficient.
  • the cutoff mechanism 20 comprises a movable contact bridge 22 having at each end a contact pad.
  • the breaking block comprises a pair of fixed contacts 41, 51. Each fixed contact is intended to cooperate with a contact pad of the movable contact bridge 22.
  • a first fixed contact 41 is intended to be connected to the current line by a pad. upstream 4.
  • a second fixed contact 51 is intended to be connected to the trigger 7 by a downstream range 5.
  • Each housing portion 12 comprises a corresponding passage recess. Said bridge is mounted between an open position in which the contact pads are spaced apart from the fixed contacts 41, 51 and a current flow position in which they are in contact with each of the fixed contacts.
  • the unipolar break block 10 comprises two arc cutting chambers 24 for extinction of electric arcs.
  • Each interrupting chamber 24 opens on an opening volume between a contact pad of the contact bridge 22 and a fixed contact.
  • Each breaking chamber 24 is delimited by two side walls 24A, a rear wall 24B remote from the opening volume, a bottom wall 24C close to the fixed contact and an upper wall 24D.
  • each breaking chamber 24 comprises a stack of at least two deionization fins 25 separated from each other by a gap for exchange of the cutoff gases.
  • the casing 12 of the cut-off block 10 further comprises arrangements allowing an optimization of the gas flow.
  • Each interrupting chamber 24 comprises at least one output connected to at least one exhaust channel 38, 42 of the cutoff gases.
  • Said exhaust channels 38, 42 are intended to evacuate the gas through at least one opening orifice 40 positioned on an upstream face of the housing 12 positioned opposite another downstream face. The downstream face of the housing 12 is intended to be placed in contact with the trigger 7.
  • Each arc-breaking chamber 24 preferably comprises at least one exchange space between two fins 25 connected to a gas exhaust channel 38, 42.
  • all the exchange spaces are connected to the channels of FIG. exhausting the gases 38, 42 at a zone remote from the opening volume towards the rear wall and at the side walls of the arc cutting chamber 24.
  • the movable contact bridge 22 is rotatable about a Y axis of rotation.
  • the contact areas of said bridge are preferably placed symmetrically with respect to the Y axis of rotation.
  • movable contact bridge 22 is mounted floating in a rotary bar 26 having a transverse housing orifice of said contact bridge.
  • the movable contact bridge 22 passing through the transverse housing orifice protrudes on either side of the bar 26.
  • Said rotary bar 26 is interposed between the two lateral faces 14 of the housing 12 cut-off block 10.
  • the mounting of the contact bridge 22 and the rotary bar 26 in a unipolar breaking block 10 is "inverted": it is desired that the lever 9 of the mechanism 8 contact operation (see figures 1 and 2A ) is centered on the cut-off device 600 of the circuit breaker 100 in operation, the protection faceplate of the protection devices of the electrical line can then be symmetrical.
  • a reversal of the direction of rotation of the bar 26 has been chosen, that is to say that the connection area 5 to the trigger 7 is located towards the rear of the circuit breaker 100 and the upstream connection range 4 is forward, above.
  • the movable contact bridge 22 is rotatable between an open position and a closed position of the contacts in a clockwise direction.
  • the escape of the gas from the contact connected to the downstream range 5 which would have traditionally been downwardly directed and rear of the device is brought up and the front of the cutoff unit 10.
  • the area placed at the back and bottom of the device corresponds to an area in which are placed the trigger 7 and possible supports fixing such as in particular a DIN rail.
  • the substantially parallelepipedal shape of the casing of the casing 12 of the cut-off block 10 is extended on the front side by a first gas exhaust channel 38.
  • Said first channel makes it possible to direct the cutoff gases of the downstream range 5 coupled to the trigger 7 to the upper part of the switchgear 100.
  • the cutoff gases are discharged outside the housing through a through hole 40.
  • the positioning of the opening opening 40 in the upper part of the device cutting and especially above the upstream range 4 also reduces the risk of rebooting the arc.
  • the escape of the gases from the contact 41 connected to the upstream range 4 are also directed upwards and forward of the breaking block 10 via at least a second exhaust channel 42.
  • at least one exhaust channel 42 is positioned at least in part in the large parallel faces 14 of the housing 12 of the breaking block 10.
  • two lateral exhaust channels 42 are arranged partly outside the housing 12 of the cutoff unit 10. These two channels are connected to one and the same cutoff chamber 24.
  • Each lateral exhaust channel 42 is connected to inside the housing 12 by two orifices 44A, 44B.
  • the portion of the external lateral flow channel 42 may preferably be hollowed into the wall of the housing 12.
  • the unipolar blocks 10 are assembled via spacers 46 to form a double envelope 48. It is advantageous to take advantage of this architecture to integrate each lateral flow channel 42 in part with the spacer 46.
  • the spacers 46 are made of molded plastic and mainly comprise a central partition 52 intended to be parallel to the large faces 14 of the cutoff blocks 10.
  • each spacer 46 includes arrangements to define in part the second lateral channels 42 of gas evacuation.
  • each lateral flow channel 42 is partially etched in the large outer face 14 of the housing 12 of the bulb 10, between the two through-holes 44A, 44B, and a corresponding element 68, etching and / or protruding contour on the central partition 52.
  • the unipolar cutoff blocks 10 are intended to be driven simultaneously, and are coupled for this purpose by at least one rod 30, in particular at the bar 26, and for example by orifices 32 forming the limit stops of the movable contact bridge. 22.
  • a single drive rod 30 is used and each housing portion 12 comprises an orifice 34 in the shape of a circular arc allowing at least the mobilization of the rod 30 passing through it between the position of current flow and the opening position.
  • said at least second gas exhaust channel 42 passes through at least one decompression chamber 43 having at least one wall covered by a metal sheet 85.
  • the inner wall covered with said sheet is part of a decompression chamber 43.
  • This metal sheet 85 constitutes a particle trap which aims on the one hand to capture the metal particles from the cut, in order to protect thermally plastic parts located downstream of the trap and on the other hand to reduce the temperature of the cutoff gases.
  • the particle trap protects the plastic parts of the channel located behind said at least one metal sheet 85 and reinforces the sealing of the joint plane of the housing 12.
  • At least one metal sheet 85 at least partially covering the inner wall of the gas exhaust channel allows good capture of the molten steel and copper balls, resulting from the erosion of the separators, the contacts and drivers during the break.
  • Said at least one metal sheet has a minimum thickness to prevent its piercing by the molten balls.
  • the minimum thickness is preferably between 0.3 and 3 mm and is to be adapted according to the cutoff energy of the product.
  • Said at least one metal sheet 85 is made of steel, copper or an iron-based alloy.
  • the inner wall of the exhaust channel covered with said at least one metal sheet 85 of the particle trap forms an angle ⁇ between 45 ° and 140 ° with respect to the direction of gas flow.
  • Said at least one metal sheet 85 at least partially covers the inner surface of the discharge channel.
  • the metal sheet extends along the longitudinal axis of the channel.
  • the total length L of internal wall covered with said at least one metal sheet 85 in the direction of flow is at least equal to the square root of the weakest flow section S of said channel measured upstream of said sheet. The greatest possible length is desirable to reduce the temperature of the gases.
  • the minimum length required is expressed according to the following equation: The ⁇ ⁇ S mini
  • said at least one metal sheet 85 extends over the internal perimeter P of the exhaust channel in a direction perpendicular to the direction of the gas flow.
  • the minimum required distance I over which said sheet extends is expressed according to the following equation: Pm / 10 ⁇ l ⁇ Pm
  • Pm is the average perimeter of the gas exhaust channel in which the particle trap is located.
  • Said decompression chamber is preferably positioned as close as possible to the exit of the arc cutting chamber.
  • the decompression chamber is placed under the bottom wall of the arc extension chamber 24.
  • the gas exhaust ducts 38 and 42 respectively of a first and second breaking chamber 24 are of different lengths, the cutoff gases flowing in a first exhaust gas channel being intended for Venturi effect the gases flowing in a second channel.
  • a gas exhaust channel 38 comprises a rotary valve 45 designed to be rotated by the passage of the cutoff gases. The rotation of the valve from a first position to a second position is intended to actuate triggering means of the cutoff device to cause the opening of the contacts.
  • each part of the housing 12 is molded with internal arrangements allowing a relatively stable positioning of the various elements making up the cut-off mechanism 20, in particular two symmetrical housings for each of the cut-off chambers 24, and a circular central recess allowing the setting place of the Bar 26.
  • two sealing flanges 27 are respectively placed between the radial faces of the rotary bar 26 and the lateral faces 14 in order to ensure a seal between the inside and the outside of the cutoff block.
  • the sealing flanges 27 are of cylindrical shape and can take the form of a washer.
  • the rotary bar 26 comprises at least one channel 29 in direct connection between the transverse housing orifice and a side face 14 so that the cutoff gases can flow directly via said channel to at least one sealing flange 27 in order to push it against one of the lateral faces 14 to ensure a seal.
  • the channel 29 of the rotary bar 26 is preferably opening and passes on either side of the rotary bar 26 from a first to a second radial face.
  • Said opening channel 29 comprises a longitudinal axis parallel to a longitudinal axis of the rotary bar 26.
  • the opening channel 29 preferably comprises a longitudinal axis aligned with a longitudinal axis of the rotary bar 26 so that the cutoff gases can exerting a thrust force substantially aligned with the longitudinal axis of the bar and evenly distributed on the sealing flanges.
  • sealing flanges 27 shown in FIG. figure 7 said flanges comprise lateral cheeks at least partially covering the longitudinal surface of the rotary bar 26 to partially close the transverse housing orifice of the bar 26.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
EP10762947.9A 2009-09-18 2010-08-30 Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif Active EP2478539B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10762947T PL2478539T3 (pl) 2009-09-18 2010-08-30 Urządzenie przerywające mające co najmniej jeden jednobiegunowy blok przerywający, zawierający mostek stykowy oraz wyłącznik samoczynny zawierający takie urządzenie

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0904457A FR2950474B1 (fr) 2009-09-18 2009-09-18 Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif
FR0904455A FR2950473B1 (fr) 2009-09-18 2009-09-18 Dispositif de coupure comportant des moyens efficaces d'evacuation des gaz de coupure
PCT/FR2010/000592 WO2011033182A2 (fr) 2009-09-18 2010-08-30 Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP2478539A2 EP2478539A2 (fr) 2012-07-25
EP2478539B1 true EP2478539B1 (fr) 2016-12-28

Family

ID=42984050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10762947.9A Active EP2478539B1 (fr) 2009-09-18 2010-08-30 Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif

Country Status (11)

Country Link
US (1) US9159508B2 (ja)
EP (1) EP2478539B1 (ja)
JP (1) JP5612099B2 (ja)
KR (1) KR101802537B1 (ja)
CN (1) CN102612725B (ja)
BR (1) BR112012006182B1 (ja)
ES (1) ES2619935T3 (ja)
MX (1) MX2012003068A (ja)
PL (1) PL2478539T3 (ja)
RU (1) RU2556240C2 (ja)
WO (1) WO2011033182A2 (ja)

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FR2986659B1 (fr) * 2012-02-02 2014-02-14 Schneider Electric Ind Sas Bloc de coupure unipolaire et dispositif de coupure comportant un tel bloc
DE102012214826A1 (de) 2012-08-21 2014-02-27 Siemens Aktiengesellschaft Schaltvorrichtung
DE102012112779A1 (de) * 2012-12-20 2014-06-26 Eaton Electrical Ip Gmbh & Co. Kg Elektrisches Schaltgerät
WO2014170529A1 (en) * 2013-04-15 2014-10-23 Abb Oy Electric switch housing
WO2015123539A1 (en) * 2014-02-17 2015-08-20 Labinal, Llc Multiple configuration switching assembly
FR3039924B1 (fr) * 2015-08-07 2019-05-10 Supergrid Institute Appareil de coupure mecanique d'un circuit electrique
US9859075B1 (en) * 2016-12-30 2018-01-02 Carling Technologies, Inc. Bottom venting circuit breaker
KR102349751B1 (ko) * 2017-03-21 2022-01-11 엘에스일렉트릭(주) 단극차단유닛이 구비된 회로 차단기
FR3069699B1 (fr) * 2017-07-26 2019-09-06 Schneider Electric Industries Sas Dispositif de filtrage de gaz de coupure et appareil de coupure d'un courant electrique comprenant un tel dispositif de filtrage
CN109741998B (zh) * 2019-02-27 2024-01-09 武汉司德宝电气有限公司 一种断路器
FR3098008A1 (fr) * 2019-06-26 2021-01-01 Schneider Electric Industries Sas Appareil électrique de commutation comportant un dispositif de filtrage
KR102289973B1 (ko) * 2021-01-26 2021-08-13 주식회사 와이엠텍 메커니즘부와 접점 장치부를 포함하는 스위치 장치
KR102286686B1 (ko) * 2021-01-26 2021-08-06 주식회사 와이엠텍 수동 핸들을 포함하는 스위치 장치

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Also Published As

Publication number Publication date
US20120168405A1 (en) 2012-07-05
EP2478539A2 (fr) 2012-07-25
WO2011033182A2 (fr) 2011-03-24
MX2012003068A (es) 2012-04-10
US9159508B2 (en) 2015-10-13
JP2013505526A (ja) 2013-02-14
CN102612725B (zh) 2016-11-09
KR20120083343A (ko) 2012-07-25
BR112012006182B1 (pt) 2019-10-22
RU2012115449A (ru) 2013-10-27
ES2619935T3 (es) 2017-06-27
CN102612725A (zh) 2012-07-25
KR101802537B1 (ko) 2017-11-28
JP5612099B2 (ja) 2014-10-22
RU2556240C2 (ru) 2015-07-10
WO2011033182A3 (fr) 2011-05-19
PL2478539T3 (pl) 2017-08-31
BR112012006182A2 (pt) 2016-05-31

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