EP2478544A1 - Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device - Google Patents

Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device

Info

Publication number
EP2478544A1
EP2478544A1 EP10762709A EP10762709A EP2478544A1 EP 2478544 A1 EP2478544 A1 EP 2478544A1 EP 10762709 A EP10762709 A EP 10762709A EP 10762709 A EP10762709 A EP 10762709A EP 2478544 A1 EP2478544 A1 EP 2478544A1
Authority
EP
European Patent Office
Prior art keywords
cutoff
channel
bar
rotary bar
block
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
EP10762709A
Other languages
German (de)
French (fr)
Other versions
EP2478544B1 (en
Inventor
Hervé ANGLADE
Marc Rival
Christophe Grumel
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 FR0904455A external-priority patent/FR2950473B1/en
Priority claimed from FR0904456A external-priority patent/FR2950471B1/en
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Priority to PL10762709T priority Critical patent/PL2478544T3/en
Publication of EP2478544A1 publication Critical patent/EP2478544A1/en
Application granted granted Critical
Publication of EP2478544B1 publication Critical patent/EP2478544B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • 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
    • 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
    • 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
    • H01H71/10—Operating or release mechanisms
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0285—Provisions for an intermediate device between two adjacent circuit breakers having the same general contour but an auxiliary function, e.g. cooling, isolation, wire guiding, magnetic isolation or screening
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H01H2071/1036—Interconnected mechanisms having provisions for four or more poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
    • 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
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts

Definitions

  • the invention relates to a unipolar breaking block comprising a rotary contact bridge, at least one fixed contact cooperating with said contact bridge and connected to a current supply conductor, a rotary bar having a transverse housing orifice with play of said contact bridge, which protrudes from the bar, said rotary bar being interposed between two side faces of the cutoff block, said side faces being substantially parallel.
  • Said rotary contact bridge also comprises two sealing flanges 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.
  • At least one arc extinction chamber opens on an opening volume of the contact bridge.
  • the invention also relates to a cut-off device comprising such a cutoff device breaking device.
  • the invention also relates to a circuit breaker comprising a cut-off device.
  • the molded-case cut-off device comprises a box 12 made of insulating plastic material containing cut-off elements of a pole, in this case a pair of fixed contacts. 41, 51 and a movable contact bridge 22, as well as two cutoff chambers 24.
  • the box 12 of parallelepipedal general shape consists of two large side faces.
  • the movable contact bridge 22 is carried by a rotating bar 26, interposed between the two large lateral faces.
  • the rotating bar 26 has a transverse housing orifice 21 which extends along a diameter in a direction parallel to the large lateral faces.
  • the movable contact bridge 22 passes through this hole with clearance projecting from both sides of the bar 26.
  • the contact bridge 22 is mounted floating on the bar 26.
  • Two current leads 4, 5 are connected to the fixed contacts 41, 51.
  • a seal between the rotating bar and the molded housing is therefore necessary.
  • This sealing can be achieved using two flanges placed respectively on the faces of the bar between said bar and the inner wall of the two large side faces.
  • the effectiveness of these solutions remains however perfectible.
  • the flanges are mounted around the drive shaft with an axial operating clearance that can be responsible for the passage of gas related to the cut.
  • the invention therefore aims to overcome the drawbacks of the state of the art, so as to provide a rotary bar cut block having effective sealing means.
  • the rotary bar of the breaking block comprises at least one channel in direct connection between the transverse housing orifice and a radial face so that the cutoff gases can flow directly via said channel to at least one flange in order to push it against one of the lateral faces to ensure a seal.
  • the rotary bar comprises two channels respectively connected between the transverse housing orifice and a radial face so that the cutoff gases can flow directly via said channels to the puddles. sealing in order to push against the side faces to ensure a seal.
  • the rotary bar comprises a channel opening and running on either side of the rotary bar from a first to a second radial face.
  • the opening channel has 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 cutting gases can exert a thrust force substantially aligned with the longitudinal axis of said bar and evenly distributed on the sealing flanges.
  • the sealing flanges comprise lateral cheeks covering at least partially the longitudinal surface of the rotary bar.
  • the lateral cheeks partially close the transverse housing housing of the bar.
  • the lateral cheeks are positioned on the entire cylindrical periphery of the sealing flange.
  • the sealing flanges comprise at least one eccentric through hole for the passage of a connecting bar for mechanically securing a plurality of bars, the connecting bar being controlled by a mechanism common to the set of several unipolar blocks.
  • the breaking block comprises a pair of fixed contacts, each fixed contact cooperating with the rotating contact bridge and a current supply conductor.
  • the block comprises two arc extinguishing chambers respectively opening on an opening volume of the contact bridge.
  • Each interrupting chamber 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 opposite to another downstream face intended to be placed in contact with means of trigger.
  • said exhaust channels of the cutoff gases meet in a common duct leading to the upstream face of the casing of the cutoff block.
  • the exhaust channels of the cutoff gases, respectively of a first and second breaking chambers are of different length, the cutoff gases flowing in a first exhaust channel being intended to suck by Venturi effect the gases flowing in a second exhaust channel.
  • 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 at least one metal sheet.
  • the breaking device comprises at least one breaking block as defined above.
  • Said device comprises a mechanism for actuating the contacts, said at least one breaking block being intended to be 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 level of an upstream range 4.
  • the circuit breaker according to the invention comprises a cut-off device as defined above.
  • Said circuit breaker comprises a trigger connected to the downstream ranges of the breaking device.
  • FIG. 1A shows a view sectional side of a known unipolar break block
  • FIG. 1B shows a detail view in perspective of a rotary bar of a cutoff block in Figure 1A;
  • FIG. 2 represents an overall perspective view of a circuit breaker comprising a cut-off device according to one embodiment of the invention;
  • FIG. 3A represents an exploded perspective view of a circuit breaker comprising a cut-off device according to one embodiment of the invention
  • FIG. 3B represents a perspective view of a cut-off device during assembly according to one embodiment of the invention
  • Figures 4 to 8 show perspective views of a unipolar cutoff block and a portion of its housing according to a preferred embodiment of the invention
  • Figures 9A and 9B show detailed sectional views of a gas exhaust channel of a cutoff unit according to the invention.
  • the circuit breaker 100 comprises a trigger 7 associated with a cut-off device 600.
  • the cut-off device 600 according to the invention comprises at least one unipolar cutoff block 10.
  • the unipolar cutoff block according to the invention is intended to be 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 an upstream range 4.
  • the unipolar cutoff block 10 is also called bulb.
  • the cut-off 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 set up in a table, with the nose 9 comprising a vertical handle and parallel to the mounting wall, the upstream connection pads 4 on the electrical line located at the top and forming the upper face 74 of the cut-off device 100 and the trigger 7 at the bottom.
  • the use of relative positional terms, such as “lateral”, “superior”, “background”, etc., should not be construed as a limiting factor.
  • 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 60 A caliber.
  • the housing 12 is formed of two parts, preferably mirror symmetrical, secured to one another on their large surface 14 by any suitable means. As illustrated in an embodiment in FIG. 4, a complementary tenon / mortise type system allows the fitting of the housing portions 12 to one another, one of the two parts (not shown) comprising adapted lugs 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 cutoff mechanism 20 housed in the housing 12.
  • the cutoff mechanism 20 comprises a movable contact bridge 22 rotatable about one of the axis of rotation Y.
  • the movable contact bridge 22 comprises at least an end having a contact pad. Said contact pad of the movable contact bridge 22 is intended to cooperate with a fixed contact. Said bridge is pivotally mounted between an open position in which the contact area is spaced from a fixed contact 41 and a current flow position in which it is in contact with the fixed contact 41.
  • the movable contact bridge 22 is mounted floating in a rotary bar 26 having a transverse housing orifice 21 of said contact bridge.
  • the movable contact bridge 22 passing through the transverse housing orifice 21 projects from the bar 26.
  • Said rotary bar 26 is interposed between two lateral faces 14 of the housing 12 cutoff block 10.
  • two sealing flanges 27 are preferably placed respectively 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 10.
  • the sealing flanges 27 are of cylindrical shape and may take the form of a washer.
  • the rotary bar 26 comprises at least one channel 29 connected directly between the transverse housing orifice 21 and a lateral face 14 so that the cutoff gases can flow directly via said channel to at least one sealing flange 27 to push against one of the side faces 14 to ensure a seal.
  • the rotary bar 26 preferably comprises two channels 29 respectively connected between the transverse housing orifice 21 and a radial face so that the cutoff gases can flow directly via said channels to the flanges seal 27 to push against the side 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 preferably 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 cut can exert a force to push substantially aligned with the longitudinal axis of the bar and evenly distributed on the sealing flanges.
  • said flanges comprise lateral cheeks at least partially covering the longitudinal surface of the rotary bar 26 to partially close the orifice transverse housing 21.
  • the lateral cheeks are preferably positioned over the entire cylindrical periphery of the sealing flange 27.
  • the cutoff mechanism 20 is 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 movable contact bridge 22 then comprises at each end a contact pad.
  • the contact pads of the contact bridge 22 are preferably placed symmetrically with respect to the axis of rotation Y.
  • the rotating movable contact bridge 22 passing through the transverse housing orifice 21 protrudes on either side of the
  • the cutoff block comprises a pair of fixed contacts 41, 51 for cooperating with a contact pad of the movable contact bridge 22. Said bridge is pivotally mounted between an open position in which the contact pads are spaced apart.
  • the unipolar breaking block 0 comprises two arc breaking chambers 24 for extinguishing the electric arcs.
  • Each interrupting chamber 24 opens on an opening volume between a contact pad of the contact bridge 22 and a fixed contact 41, 51.
  • Each breaking chamber 24 is delimited by two side walls 24A, a rear wall 24B remote. the opening volume, a bottom wall 24C close to the fixed contact and a top wall 24D.
  • each breaking chamber 24 comprises a stack of at least two deionization vanes 25 separated from one another by a gap of exchange of the cutoff gases.
  • the housing 12 of the breaking block 10 furthermore comprises arrangements for optimizing the flow of gases.
  • 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 gases 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-cutting chamber 24 has less than an exchange space between two fins 25 connected to a gas exhaust channel 38, 42.
  • all the exchange spaces are connected to the exhaust gas channels. 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 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 for actuating the contacts (see FIGS. 3A) 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 20 is extended on the front side by a first exhaust channel of the gases 38. Said first channel makes it possible to direct the cutoff gases of the range downstream 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 cutting device and especially above the upstream range 4 also reduces the risk of rebooting the arc.
  • the exhaust gas of the contact 41 connected to the upstream range 4 are also directed upwardly and forwardly of the breaking block 0 via at least a second exhaust channel 42.
  • said 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 in part outside the housing 12 of the cut-off block 10. These two channels are connected to one and the same breaking chamber 24.
  • Each lateral exhaust channel 42 is connected 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 gas exhaust ducts 38 and 42 respectively of a first and second breaking chambers 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.
  • each part of the housing 12 is molded with internal arrangements allowing a relatively stable positioning of the various elements making up the breaking mechanism 20, in particular two symmetrical housings for each of the cutoff chambers 24, and a circular central housing for the installation of the bar 26.
  • 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.
  • each housing portion 12 comprises an orifice 34 in the shape of an arc of a circle allowing at least the mobilization of the rod 30. crossing e between the current flow position and the open position.
  • said at least second exhaust gas channel 42 passes through at least one decompression chamber 43 comprising 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 ⁇ of 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:
  • 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 on 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.
  • a gas exhaust channel 38 comprises a rotary valve 45 intended 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.
  • circuit breaker 100 makes it possible to best meet the following antinomic industrial constraints:
  • the trigger 7 can be connected from below to the downstream range of the cut-off device 600, which gives the best accessibility to the connection screws by reversing the direction of rotation of the rotary cutoff bridge 22;
  • the nose 9 of the cut-off device 600 is centered, in particular at 42.5 mm, thanks to the reversal of the direction of rotation in the cut-off blocks 10, which makes it possible to use symmetrical plastrons in the cabinets;
  • the cutoff gases are not evacuated next to the trip unit 7, which limits the pollution on this element which can be sensitive, in particular in its electronic version, and frees up the volume;
  • the exhaust gas cutoff is also not carried out under the connections 4, 5 of the circuit breaker 100, which limits the risks of ignition in cutoff;

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Abstract

The invention relates to a cutoff unit including a contact bridge (22), at least one stationary contact (41, 51) engaging with said contact bridge, and a rotary bar (26) having a transverse opening for receiving (21) said bridge which projects from the bar (20), said bar (20) being inserted between two side surfaces (14) of the cutoff unit. Said contact bridge includes two sealing flanges (27) placed between the radial surfaces of the rotary bar (26) and the side surfaces (14), respectively. At least one arc-extinguishing chamber (24) opens out onto an opening space of the contact bridge (22). The rotary bar (26) comprises at least one channel (29) for connecting to the transverse receiving opening (21).

Description

BLOC DE COUPURE UNIPOLAIRE COMPORTANT UN PONT DE CONTACTS ROTATIF, DISPOSITIF DE COUPURE COMPORTANT UN TEL BLOC ET DISJONTEUR COMPORTANT UN TEL DISPOSITIF  UNIPOLAR CUT-OFF BLOCK COMPRISING A ROTARY CONTACTING BRIDGE, CUTTING DEVICE COMPRISING SUCH A BLOCK AND CIRCUIT BREAKER COMPRISING SUCH A DEVICE
DOMAINE TECHNIQUE DE L'INVENTION L'invention est relative à un bloc de coupure unipolaire comprenant un pont de contacts rotatif, au moins un contact fixe coopérant avec ledit pont de contacts et relié à un conducteur d'amenée de courant, un barreau rotatif ayant un orifice transversal de logement avec jeu dudit pont de contacts, lequel fait saillie de part du barreau, ledit barreau rotatif étant intercalé entre deux faces latérales du bloc de coupure, lesdites faces latérales étant sensiblement parallèles. Ledit pont de contacts rotatif comprend aussi deux flasques d'étanchéité placés respectivement entre les faces radiales du barreau rotatif et les faces latérales afin d'assurer une étanchéité entre l'intérieur et l'extérieur du bloc de coupure. Au moins une chambre d'extinction d'arc s'ouvre sur un volume d'ouverture du pont de contacts. L'invention est aussi relative à un dispositif de coupure comportant un tel bloc de coupure dispositif de coupure. TECHNICAL FIELD OF THE INVENTION The invention relates to a unipolar breaking block comprising a rotary contact bridge, at least one fixed contact cooperating with said contact bridge and connected to a current supply conductor, a rotary bar having a transverse housing orifice with play of said contact bridge, which protrudes from the bar, said rotary bar being interposed between two side faces of the cutoff block, said side faces being substantially parallel. Said rotary contact bridge also comprises two sealing flanges 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. At least one arc extinction chamber opens on an opening volume of the contact bridge. The invention also relates to a cut-off device comprising such a cutoff device breaking device.
L'invention est aussi relative à un disjoncteur comportant un dispositif de coupure. The invention also relates to a circuit breaker comprising a cut-off device.
ETAT DE LA TECHNIQUE L'utilisation de pont de contact dans des dispositifs de coupure est décrite dans de nombreux brevets, notamment des brevets de la demanderesse EP0538149 et EP0560697. STATE OF THE ART The use of contact bridges in cut-off devices is described in numerous patents, in particular patents of the applicant EP0538149 and EP0560697.
De manière connue, comme représentée sur les figures 1A, 1 B, le dispositif de coupure à boîtier moulé comporte une boîte 12, en matière plastique isolante contenant des éléments de coupure d'un pôle, en l'occurrence, une paire de contacts fixes 41 , 51 et un pont de contacts mobile 22, ainsi que deux chambres de coupure 24. La boîte 12 de forme générale parallélépipédique est constituée de deux grandes faces latérales. Le pont de contacts mobile 22 est porté par un barreau 26 rotatif, intercalé entre les deux grandes faces latérales. Le barreau 26 rotatif présente un orifice transversal de logement 21 qui s'étend suivant un diamètre dans une direction parallèle aux grandes faces latérales. Le pont de contacts mobile 22 traverse cet orifice avec jeu en faisant saillie de part et d'autre du barreau 26. Le pont de contacts 22 est monté flottant sur le barreau 26. Deux conducteurs d'amenée de courant 4, 5 sont reliés aux contacts fixes 41 , 51. In known manner, as shown in FIGS. 1A, 1B, the molded-case cut-off device comprises a box 12 made of insulating plastic material containing cut-off elements of a pole, in this case a pair of fixed contacts. 41, 51 and a movable contact bridge 22, as well as two cutoff chambers 24. The box 12 of parallelepipedal general shape consists of two large side faces. The movable contact bridge 22 is carried by a rotating bar 26, interposed between the two large lateral faces. The rotating bar 26 has a transverse housing orifice 21 which extends along a diameter in a direction parallel to the large lateral faces. The movable contact bridge 22 passes through this hole with clearance projecting from both sides of the bar 26. The contact bridge 22 is mounted floating on the bar 26. Two current leads 4, 5 are connected to the fixed contacts 41, 51.
Pour garantir une coupure électrique efficace, il est nécessaire d'éviter les fuites de gaz au niveau des axes d'entraînement du barreau 26. Ces fuites de gaz ont pour effet de créer un rétroflux et de gêner l'insertion de l'arc dans les chambres de coupure. To guarantee an efficient electrical cut, it is necessary to avoid gas leaks at the drive axes of the bar 26. These gas leaks have the effect of creating a retroflux and hindering the insertion of the arc in breaking rooms.
Une étanchéité entre le barreau rotatif et le boîtier moulé est donc nécessaire. Cette étanchéité peut être réalisée à l'aide de deux flasques placés respectivement sur les faces du barreau entre ledit barreau et la paroi interne des deux grandes faces latérales. L'efficacité de ces solutions reste cependant perfectible. Les flasques sont montés autour de l'axe d'entraînement avec un jeu axial de fonctionnement pouvant être responsable du passage des gaz liés à la coupure. A seal between the rotating bar and the molded housing is therefore necessary. This sealing can be achieved using two flanges placed respectively on the faces of the bar between said bar and the inner wall of the two large side faces. The effectiveness of these solutions remains however perfectible. The flanges are mounted around the drive shaft with an axial operating clearance that can be responsible for the passage of gas related to the cut.
EXPOSE DE L'INVENTION SUMMARY OF THE INVENTION
L'invention vise donc à remédier aux inconvénients de l'état de la technique, de manière à proposer un bloc de coupure à barreau rotatif comportant des moyens d'étanchéité efficaces. The invention therefore aims to overcome the drawbacks of the state of the art, so as to provide a rotary bar cut block having effective sealing means.
Le barreau rotatif du bloc de coupure selon l'invention comporte au moins un canal en liaison direct entre l'orifice transversal de logement et une face radiale de manière à ce que les gaz de coupure puissent circuler directement via ledit canal vers au moins un flasque d'étanchéité afin de le pousser contre une des faces latérales pour assurer une étanchéité. The rotary bar of the breaking block according to the invention comprises at least one channel in direct connection between the transverse housing orifice and a radial face so that the cutoff gases can flow directly via said channel to at least one flange in order to push it against one of the lateral faces to ensure a seal.
Selon un mode particulier de réalisation de l'invention, le barreau rotatif comporte deux canaux respectivement en liaison entre l'orifice transversal de logement et une face radiale de manière à ce que les gaz de coupure puissent circuler directement via lesdits canaux vers les flaques d'étanchéité afin de les pousser contre les faces latérales pour assurer une étanchéité. According to a particular embodiment of the invention, the rotary bar comprises two channels respectively connected between the transverse housing orifice and a radial face so that the cutoff gases can flow directly via said channels to the puddles. sealing in order to push against the side faces to ensure a seal.
Selon un autre mode particulier de réalisation de l'invention, le barreau rotatif comporte un canal débouchant et traversant de part et d'autre le barreau rotatif d'une première à une seconde face radiale. Avantageusement, le canal débouchant comporte un axe longitudinal parallèle à un axe longitudinal du barreau rotatif. According to another particular embodiment of the invention, the rotary bar comprises a channel opening and running on either side of the rotary bar from a first to a second radial face. Advantageously, the opening channel has a longitudinal axis parallel to a longitudinal axis of the rotary bar.
Avantageusement, le canal débouchant comporte un axe longitudinal aligné avec un axe longitudinal du barreau rotatif de manière à ce que les gaz de coupure puissent exercer une force de poussée sensiblement alignée avec l'axe longitudinal dudit barreau et répartie uniformément sur les flasques d'étanchéité. Advantageously, the opening channel comprises a longitudinal axis aligned with a longitudinal axis of the rotary bar so that the cutting gases can exert a thrust force substantially aligned with the longitudinal axis of said bar and evenly distributed on the sealing flanges. .
De préférence, les flasques d'étanchéité comportent des joues latérales recouvrant au moins partiellement la surface longitudinale du barreau rotatif. Preferably, the sealing flanges comprise lateral cheeks covering at least partially the longitudinal surface of the rotary bar.
De préférence, les joues latérales ferment partiellement l'orifice transversal de logement du barreau. De préférence, les joues latérales sont positionnées sur tout le pourtour cylindrique du flasque d'étanchéité. Preferably, the lateral cheeks partially close the transverse housing housing of the bar. Preferably, the lateral cheeks are positioned on the entire cylindrical periphery of the sealing flange.
Selon un mode de développement de l'invention, les flasques d'étanchéité comportent au moins un trou de passage excentré destiné au passage d'une barre de liaison pour solidariser mécaniquement plusieurs barreaux, la barre de liaison étant commandée par un mécanisme commun à l'ensemble de plusieurs blocs unipolaires. According to one embodiment of the invention, the sealing flanges comprise at least one eccentric through hole for the passage of a connecting bar for mechanically securing a plurality of bars, the connecting bar being controlled by a mechanism common to the set of several unipolar blocks.
Avantageusement, le bloc de coupure comporte une paire de contacts fixes, chaque contact fixe coopérant avec le pont de contacts rotatif et un conducteur d'amenée de courant. Le bloc comporte deux chambres d'extinction d'arc s'ouvrant respectivement sur un volume d'ouverture du pont de contacts. Chaque chambre de coupure est reliée à au moins un canal d'échappement des gaz de coupure, lesdits canaux d'échappement étant débouchant sur une face amont du boîtier du bloc de coupure, ladite face amont étant positionnée à l'opposé d'une autre face aval destinée à être placée en contact avec des moyens de déclenchement. Advantageously, the breaking block comprises a pair of fixed contacts, each fixed contact cooperating with the rotating contact bridge and a current supply conductor. The block comprises two arc extinguishing chambers respectively opening on an opening volume of the contact bridge. Each interrupting chamber 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 opposite to another downstream face intended to be placed in contact with means of trigger.
Avantageusement, lesdits canaux d'échappement des gaz de coupure se réunissent dans un conduit commun débouchant sur la face amont du boîtier du bloc de coupure. De préférence, les canaux d'échappement des gaz coupure, respectivement d'une première et seconde chambres de coupure sont de longueur différente, les gaz de coupure circulant dans un premier canal d'échappement étant destiné à aspirer par effet Venturi les gaz circulant dans un second canal d'échappement. Advantageously, said exhaust channels of the cutoff gases meet in a common duct leading to the upstream face of the casing of the cutoff block. Preferably, the exhaust channels of the cutoff gases, respectively of a first and second breaking chambers are of different length, the cutoff gases flowing in a first exhaust channel being intended to suck by Venturi effect the gases flowing in a second exhaust channel.
Selon un mode de développement de l'invention, ledit au moins un canal d'échappement des gaz d'une chambre de coupure d'arc traverse au moins une chambre de décompression comportant au moins une paroi recouverte au moins d'une feuille métallique. According to a development mode of the invention, 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 at least one metal sheet.
Le dispositif de coupure selon l'invention comporte au moins un bloc de coupure tel que défini ci-dessus. Ledit dispositif comporte un mécanisme d'actionnement des contacts, ledit au moins un bloc de coupure étant destiné à être raccordé d'une part au déclencheur 7 au niveau de la plage aval 5 et d'autre part à une ligne de courant à protéger au niveau d'une plage amont 4. The breaking device according to the invention comprises at least one breaking block as defined above. Said device comprises a mechanism for actuating the contacts, said at least one breaking block being intended to be 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 level of an upstream range 4.
Le disjoncteur selon l'invention comporte un dispositif de coupure tel que défini ci-dessus. Ledit disjoncteur comporte un déclencheur connecté aux plages aval du dispositif de coupure. The circuit breaker according to the invention comprises a cut-off device as defined above. Said circuit breaker comprises a trigger connected to the downstream ranges of the breaking device.
BREVE DESCRIPTION DES FIGURES BRIEF DESCRIPTION OF THE FIGURES
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés sur lesquels : La figure 1A montre une vue de coté en coupe d'un bloc de coupure unipolaire connu ; Other advantages and features will emerge more clearly from the following description of a particular embodiment of the invention, given by way of non-limiting example, and shown in the accompanying drawings, in which: FIG. 1A shows a view sectional side of a known unipolar break block;
La figure 1 B montre une vue de détail en perspective d'un barreau rotatif d'un bloc de coupure sur la figure 1A ; La figure 2 représente une vue d'ensemble en perspective d'un disjoncteur comportant un dispositif de coupure selon un mode de réalisation de l'invention ; Figure 1B shows a detail view in perspective of a rotary bar of a cutoff block in Figure 1A; FIG. 2 represents an overall perspective view of a circuit breaker comprising a cut-off device according to one embodiment of the invention;
La figure 3A représente une vue éclatée en perspective d'un disjoncteur comportant un dispositif de coupure selon un mode de réalisation de l'invention ; La figure 3B représente une vue en perspective d'un dispositif de coupure en cours d'assemblage selon un mode de réalisation de l'invention ; FIG. 3A represents an exploded perspective view of a circuit breaker comprising a cut-off device according to one embodiment of the invention; FIG. 3B represents a perspective view of a cut-off device during assembly according to one embodiment of the invention;
Les figures 4 à 8 montrent des vues en perspective d'un bloc unipolaire de coupure et une partie de son boîtier selon un mode de réalisation préféré de l'invention ; Les figures 9A et 9B montrent des vues de détail en coupe d'un canal d'échappement des gaz d'un bloc de coupure selon l'invention. Figures 4 to 8 show perspective views of a unipolar cutoff block and a portion of its housing according to a preferred embodiment of the invention; Figures 9A and 9B show detailed sectional views of a gas exhaust channel of a cutoff unit according to the invention.
DESCRIPTION DETAILLEE D'UN MODE DE REALISATION DETAILED DESCRIPTION OF AN EMBODIMENT
Selon un mode de réalisation de l'invention, le disjoncteur 100 comporte un déclencheur 7 associé à un dispositif de coupure 600. Le dispositif de coupure 600 selon l'invention comprend au moins un bloc de coupure unipolaire 10. Le bloc de coupure unipolaire selon l'invention est destiné à être raccordé d'une part au déclencheur 7 au niveau de la plage aval 5 et d'autre part à une ligne de courant à protéger au niveau d'une plage amont 4. Le bloc de coupure unipolaire 10 est aussi appelé ampoule. Selon un mode de réalisation de l'invention tel que représenté sur les figures 3A, 3B, le dispositif de coupure 600 comporte trois blocs de coupure unipolaire. L'appareil de coupure 100 est alors un disjoncteur tripolaire. Selon d'autres modes de réalisations non représentés, l'appareil de coupure pourrait être un disjoncteur uni, bi ou tétrapolaire. Par souci de simplification de la présentation d'un mode de réalisation préféré de l'invention, les éléments composant l'appareil de coupure 100, et notamment les blocs de coupure unipolaire 10 formant le dispositif de coupure 600, seront décrits en relation avec la position d'utilisation dans laquelle le disjoncteur 100 est mis en place dans un tableau, avec le nez 9 comprenant une manette verticale et parallèle à la paroi de montage, les plages de raccordement amont 4 sur la ligne électrique localisées en haut et formant la face supérieure 74 du dispositif de coupure 100 et le déclencheur 7 en bas. L'utilisation des termes relatifs de position, tels que « latéral », « supérieur », « fond », etc., ne doit pas être interprétée comme un facteur limitant. La manette est destinée commander un mécanisme d'actionnement 8 des contacts électriques. According to one embodiment of the invention, the circuit breaker 100 comprises a trigger 7 associated with a cut-off device 600. The cut-off device 600 according to the invention comprises at least one unipolar cutoff block 10. The unipolar cutoff block according to the invention is intended to be 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 an upstream range 4. The unipolar cutoff block 10 is also called bulb. According to one embodiment of the invention as shown in FIGS. 3A, 3B, the cut-off device 600 comprises three unipolar breaking blocks. The switching device 100 is then a three-pole circuit breaker. According to other embodiments not shown, the switchgear could be a uni circuit breaker, bi or four-pole. For the sake of simplification of the presentation of a preferred embodiment of the invention, the elements making up the switching apparatus 100, and in particular the unipolar breaking blocks 10 forming the breaking device 600, will be described in relation to the use position in which the circuit breaker 100 is set up in a table, with the nose 9 comprising a vertical handle and parallel to the mounting wall, the upstream connection pads 4 on the electrical line located at the top and forming the upper face 74 of the cut-off device 100 and the trigger 7 at the bottom. The use of relative positional terms, such as "lateral", "superior", "background", etc., should not be construed as a limiting factor. The handle is intended to control an actuating mechanism 8 of the electrical contacts.
Chaque bloc de coupure unipolaire 10 permet la coupure d'un seul pôle. Ledit bloc se présente avantageusement sous forme d'un boîtier plat 12 en plastique moulé, avec deux grandes faces parallèles 14 distantes d'une épaisseur e. Notamment, dans le mode de réalisation illustré, l'épaisseur e est de l'ordre de 23 mm pour un calibre 60 A. 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. In particular, in the illustrated embodiment, the thickness e is of the order of 23 mm for a 60 A caliber.
Le boîtier 12 est formé de deux parties, de préférence symétriques en miroir, solidarisées l'une à l'autre sur leur grande surface 14 par tout moyen adapté. Tel qu'illustré dans un mode de réalisation en figure 4, un système complémentaire de type tenon/mortaise permet l'ajustement des parties de boîtier 12 l'une sur l'autre, une des deux parties (non illustrée) comprenant des ergots adaptés pour pénétrer dans des évidements de l'autre. Des aménagements 18 sont par ailleurs réalisés afin de permettre la juxtaposition des boîtiers 12 de bloc unipolaire 10 et leur solidarisation pour un disjoncteur multipolaire 100. The housing 12 is formed of two parts, preferably mirror symmetrical, secured to one another on their large surface 14 by any suitable means. As illustrated in an embodiment in FIG. 4, a complementary tenon / mortise type system allows the fitting of the housing portions 12 to one another, one of the two parts (not shown) comprising adapted lugs 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.
Le bloc de coupure unipolaire comprend un mécanisme de coupure 20 logé dans le boîtier 12. Le mécanisme de coupure 20 comprend un pont de contacts mobile 22 rotatif autour d'un d'axe de rotation Y. Le pont de contact mobile 22 comprend au moins une extrémité comportant une plage de contact. Ladite plage de contact du pont de contacts mobile 22 est destinée à coopérer avec un contact fixe. Ledit pont est monté pivotant entre une position d'ouverture dans laquelle la plage de contact est écartée d'un contact fixe 41 et une position de passage de courant dans laquelle elle est en contact avec le contact fixe 41. The unipolar breaking block comprises a cutoff mechanism 20 housed in the housing 12. The cutoff mechanism 20 comprises a movable contact bridge 22 rotatable about one of the axis of rotation Y. The movable contact bridge 22 comprises at least an end having a contact pad. Said contact pad of the movable contact bridge 22 is intended to cooperate with a fixed contact. Said bridge is pivotally mounted between an open position in which the contact area is spaced from a fixed contact 41 and a current flow position in which it is in contact with the fixed contact 41.
Le pont de contact mobile 22 est monté flottant dans un barreau rotatif 26 ayant un orifice transversal de logement 21 dudit pont de contacts. Le pont de contact mobile 22 passant à travers l'orifice transversal de logement 21 fait saillie du barreau 26. Ledit barreau rotatif 26 est intercalé entre deux faces latérales 14 du boîtier 12 bloc de coupure 10. The movable contact bridge 22 is mounted floating in a rotary bar 26 having a transverse housing orifice 21 of said contact bridge. The movable contact bridge 22 passing through the transverse housing orifice 21 projects from the bar 26. Said rotary bar 26 is interposed between two lateral faces 14 of the housing 12 cutoff block 10.
Selon un mode de développement de l'invention représenté sur les figures 5, 7 et 8, deux flasques d'étanchéité 27 sont de préférence placés respectivement entre les faces radiales du barreau rotatif 26 et les faces latérales 14 afin d'assurer une étanchéité entre l'intérieur et l'extérieur du bloc de coupure 10. A titre d'exemple, compte tenu de la forme du barreau rotatif, les flasques d'étanchéité 27 sont de forme cylindrique et peuvent prendre la forme d'une rondelle. Le barreau rotatif 26 comporte au moins un canal 29 en liaison directe entre l'orifice transversal de logement 21 et une face latérale 14 de manière à ce que les gaz de coupure puissent circuler directement via ledit canal vers au moins un flasque d'étanchéité 27 afin de le pousser contre une des faces latérales 14 pour assurer une étanchéité. Selon une première alternative de réalisation, le barreau rotatif 26 comporte de préférence deux canaux 29 respectivement en liaison entre l'orifice transversal de logement 21 et une face radiale de manière à ce que les gaz de coupure puissent circuler directement via lesdits canaux vers les flasques d'étanchéité 27 afin de les pousser contre les faces latérales 14 pour assurer une étanchéité. Selon une seconde alternative de réalisation, le canal 29 du barreau rotatif 26 est de préférence débouchant et traverse de part et d'autre le barreau rotatif 26 d'une première à une seconde face radiale. Ledit canal 29 débouchant comporte de préférence un axe longitudinal parallèle à un axe longitudinal du barreau rotatif 26. En outre, le canal débouchant 29 comporte de préférence un axe longitudinal aligné avec un axe longitudinal du barreau rotatif 26 de manière à ce que les gaz de coupure puissent exercer une force de pousser sensiblement alignée avec l'axe longitudinal du barreau et répartie uniformément sur les flasques d'étanchéité. According to one embodiment of the invention shown in FIGS. 5, 7 and 8, two sealing flanges 27 are preferably placed respectively 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 10. For example, taking into account the shape of the rotary bar, the sealing flanges 27 are of cylindrical shape and may take the form of a washer. The rotary bar 26 comprises at least one channel 29 connected directly between the transverse housing orifice 21 and a lateral face 14 so that the cutoff gases can flow directly via said channel to at least one sealing flange 27 to push against one of the side faces 14 to ensure a seal. According to a first alternative embodiment, the rotary bar 26 preferably comprises two channels 29 respectively connected between the transverse housing orifice 21 and a radial face so that the cutoff gases can flow directly via said channels to the flanges seal 27 to push against the side faces 14 to ensure a seal. According to a second alternative embodiment, 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 preferably comprises a longitudinal axis parallel to a longitudinal axis of the rotary bar 26. In addition, the opening channel 29 preferably comprises a longitudinal axis aligned with a longitudinal axis of the rotary bar 26 so that cut can exert a force to push substantially aligned with the longitudinal axis of the bar and evenly distributed on the sealing flanges.
Selon un mode particulier de réalisation des flasques d'étanchéité 27, lesdits flasques comportent des joues latérales recouvrant au moins partiellement la surface longitudinale du barreau rotatif 26 pour fermer partiellement l'orifice transversal de logement 21. Les joues latérales sont positionnées de préférence sur tout le pourtour cylindrique du flasque d'étanchéité 27. According to a particular embodiment of the sealing flanges 27, said flanges comprise lateral cheeks at least partially covering the longitudinal surface of the rotary bar 26 to partially close the orifice transverse housing 21. The lateral cheeks are preferably positioned over the entire cylindrical periphery of the sealing flange 27.
Selon un mode de réalisation préféré illustré sur les figures 5 à 8, le mécanisme de coupure 20 est à double coupure rotative. De fait, l'appareil de coupure 100 selon l'invention est particulièrement destiné à des applications jusqu'à 630 A et dans certaines applications jusqu'à 800 A, pour lesquelles la simple coupure peut ne pas être suffisante. Le pont de contact mobile 22 comprend alors à chaque extrémité une plage de contact. Les plages de contact du pont de contact 22 sont de préférence placées symétriquement par rapport à l'axe de rotation Y. Le pont de contact mobile 22 rotatif passant à travers l'orifice transversal de logement 21 fait saillie de part et d'autre du barreau 26. Le bloc de coupure comporte une paire de contacts fixes 41 , 51 destinés coopérer avec une plage de contact du pont de contacts mobile 22. Ledit pont est monté pivotant entre une position d'ouverture dans laquelle les plages de contact sont écartées des contacts fixes 41 , 51 et une position de passage de courant dans laquelle elles sont en contact avec les contacts fixes 41 , 51. Un premier contact fixe 41 est destiné à être raccordé à la ligne de courant par une plage amont 4. Un second contact fixe 51 est destiné à être raccordé au déclencheur 7 par une plage aval 5. Le bloc de coupure unipolaire 0 comprend deux chambres de coupure d'arc 24 pour l'extinction des arcs électriques. Chaque chambre de coupure 24 s'ouvre sur un volume d'ouverture entre une plage de contact du pont de contacts 22 et un contact fixe 41 , 51. Chaque chambre de coupure 24 est délimitée par deux parois latérales 24A, une paroi postérieure 24B éloignée du volume d'ouverture, une paroi inférieure 24C proche du contact fixe et une paroi supérieure 24D. Comme représenté sur la figure 5, chaque chambre de coupure 24 comprend un empilement d'au moins deux d'ailettes de désionisation 25 séparées les unes des autres par un espace d'échange des gaz de coupure. According to a preferred embodiment illustrated in Figures 5 to 8, the cutoff mechanism 20 is double rotary cut. In fact, 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 movable contact bridge 22 then comprises at each end a contact pad. The contact pads of the contact bridge 22 are preferably placed symmetrically with respect to the axis of rotation Y. The rotating movable contact bridge 22 passing through the transverse housing orifice 21 protrudes on either side of the The cutoff block comprises a pair of fixed contacts 41, 51 for cooperating with a contact pad of the movable contact bridge 22. Said bridge is pivotally mounted between an open position in which the contact pads are spaced apart. fixed contacts 41, 51 and a current passage position in which they are in contact with the fixed contacts 41, 51. A first fixed contact 41 is intended to be connected to the current line by an upstream range 4. A second contact fixed 51 is intended to be connected to the trip unit 7 by a downstream range 5. The unipolar breaking block 0 comprises two arc breaking chambers 24 for extinguishing the electric arcs. Each interrupting chamber 24 opens on an opening volume between a contact pad of the contact bridge 22 and a fixed contact 41, 51. Each breaking chamber 24 is delimited by two side walls 24A, a rear wall 24B remote. the opening volume, a bottom wall 24C close to the fixed contact and a top wall 24D. As shown in FIG. 5, each breaking chamber 24 comprises a stack of at least two deionization vanes 25 separated from one another by a gap of exchange of the cutoff gases.
Comme, selon un mode particulier de réalisation l'invention, tel que notamment décrit dans la demande de brevet français déposée ce jour au nom de la Demanderesse et intitulée : « Dispositif de coupure ayant au moins un bloc de coupure unipolaire comportant un pont de contacts et disjoncteur comportant un tel dispositif », le boîtier 12 du bloc de coupure 10 comprend en outre des aménagements permettant une optimisation de l'écoulement des gaz. Chaque chambre de coupure 24 comporte au moins une sortie reliée à au moins un canal d'échappement 38, 42 des gaz de coupure. Lesdits canaux d'échappement 38, 42 sont destinés évacuer les gaz par au moins un orifice débouchant 40 positionné sur une face amont du boîtier 12 positionnée à l'opposé d'une autre face aval. La face aval du boîtier 12 est destinée à être placée en contact avec le déclencheur 7. As, according to a particular embodiment of the invention, such as in particular described in the French patent application filed today in the name of the Applicant and entitled: "Cutoff device having at least one unipolar break block having a contact bridge and a circuit-breaker comprising such a device ", the housing 12 of the breaking block 10 furthermore comprises arrangements for optimizing the flow of gases. 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 gases 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.
Chaque chambre de coupure d'arc 24 comporte moins un espace d'échange entre deux ailettes 25 relié à un canal d'échappement des gaz 38, 42. De préférence, tous les espaces d'échange sont reliés aux canaux d'échappement des gaz 38, 42 au niveau d'une zone éloignée du volume d'ouverture vers la paroi postérieure et au niveau des parois latérales de la chambre de coupure d'arc 24. Each arc-cutting chamber 24 has less than an exchange space between two fins 25 connected to a gas exhaust channel 38, 42. Preferably, all the exchange spaces are connected to the exhaust gas channels. 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.
Selon ce mode de réalisation, le montage du pont de contact 22 et du barreau rotatif 26 dans un bloc de coupure unipolaire 10 est « inversé » : il est souhaité que la manette 9 du mécanisme 8 d'actionnement des contacts (voir figures 2 et 3A) soit centrée sur le dispositif de coupure 600 du disjoncteur 100 en fonctionnement, le plastron de protection des appareils de protection de la ligne électrique pouvant alors être symétrique. A cette fin, une inversion du sens de rotation du barreau 26 a été choisie, c'est-à-dire que la plage de raccordement 5 vers le déclencheur 7 est localisée vers l'arrière du disjoncteur 100 et la plage de raccordement amont 4 est vers l'avant, au-dessus. Ainsi, le pont de contact mobile 22 est rotatif entre une position d'ouverture et une position de fermeture des contacts dans un sens horaire. Ainsi, dans ce mode de réalisation préféré dans lequel le sens de rotation du pont de contact rotatif est inversé, l'échappement des gaz du contact relié à la plage aval 5 qui aurait du de manière traditionnelle, être dirigé vers le bas et l'arrière de l'appareil est ramené vers le haut et l'avant du bloc de coupure 10. La zone placée à l'arrière et en bas de l'appareil correspond à une zone dans laquelle sont placés le déclencheur 7 et d'éventuels supports de fixation tel que notamment un rail DIN. En particulier, la forme sensiblement parallélépipédique de l'enveloppe du boîtier 12 du bloc de coupure 20 est prolongée sur le côté avant par un premier canal d'échappement des gaz 38. Ledit premier canal permet de diriger les gaz de coupure de la plage aval 5 couplée au déclencheur 7 vers la partie supérieure de l'appareil de coupure 100. Les gaz de coupure sont évacués à l'extérieur du boîtier à travers un orifice débouchant 40. Le positionnement de l'orifice débouchant 40 dans la partie haute du dispositif de coupure et notamment au dessus de la plage amont 4 permet aussi de réduire des risques de réamorçage de l'arc. According to this embodiment, 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 for actuating the contacts (see FIGS. 3A) 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. To this end, 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. Thus, the movable contact bridge 22 is rotatable between an open position and a closed position of the contacts in a clockwise direction. Thus, in this preferred embodiment in which the direction of rotation of the rotating contact bridge is reversed, 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. In particular, the substantially parallelepipedal shape of the casing of the casing 12 of the cut-off block 20 is extended on the front side by a first exhaust channel of the gases 38. Said first channel makes it possible to direct the cutoff gases of the range downstream 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 cutting device and especially above the upstream range 4 also reduces the risk of rebooting the arc.
Par ailleurs, avantageusement, l'échappement des gaz du contact 41 relié à la plage amont 4 sont eux aussi dirigés vers le haut et l'avant du bloc de coupure 0 via au moins un second canal d'échappement 42. En particulier, ledit au moins canal d'échappement 42 est positionné au moins en partie dans les grandes faces parallèles 14 du boîtier 12 du bloc de coupure 10. Furthermore, advantageously, the exhaust gas of the contact 41 connected to the upstream range 4 are also directed upwardly and forwardly of the breaking block 0 via at least a second exhaust channel 42. In particular, said 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.
Comme représenté sur la figure 6, selon un mode de développement deux canaux d'échappement latéral 42 sont aménagés en parti à l'extérieur du boîtier 12 du bloc de coupure 10. Ces deux canaux sont reliés à une même chambre de coupure 24. Chaque canal d'échappement latéral 42 est relié à l'intérieur du boîtier 12 par deux orifices 44A, 44B. La partie du canal d'écoulement latéral 42 externe peut de préférence être creusé dans la paroi du boîtier 12. As shown in FIG. 6, according to one mode of development, two lateral exhaust channels 42 are arranged in part outside the housing 12 of the cut-off block 10. These two channels are connected to one and the same breaking chamber 24. Each lateral exhaust channel 42 is connected 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.
Selon un mode de développement de l'invention représenté sur les figures 5 et 6, tous les canaux d'échappement des gaz 38, 42 se réunissent dans un conduit commun débouchant sur la face amont du boîtier 12 du bloc de coupure 0. Les gaz de coupure sont alors évacués via un seul orifice débouchant 40. Ainsi, les gaz générés au moment de la coupure dans les chambres de coupure 24 sont avantageusement dirigés loin du déclencheur 7 et des éventuels supports de fixation tel que notamment un rail DIN. According to a development mode of the invention shown in FIGS. 5 and 6, all the gas exhaust ducts 38, 42 meet in a common duct leading to the upstream face of the casing 12 of the cutoff block 0. The gases cutoff are then evacuated via a single orifice opening 40. Thus, the gases generated at the time of the cut in the breaking chambers 24 are advantageously directed away from the trigger 7 and any mounting brackets such as including a DIN rail.
Selon une première variante de réalisation, les canaux d'échappement des gaz 38 et 42 respectivement d'une première et seconde chambres de coupure 24 sont de longueur différente, les gaz de coupure circulant dans une premier canal d'échappement des gaz étant destinés à aspirer par effet Venturi les gaz circulant dans un second canal. According to a first variant embodiment, the gas exhaust ducts 38 and 42 respectively of a first and second breaking chambers 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.
Avantageusement, chaque partie du boîtier 12 est moulée avec des aménagements internes permettant un positionnement relativement stable des différents éléments composant le mécanisme de coupure 20, en particulier deux logements symétriques pour chacune des chambres de coupure 24, et un logement central circulaire permettant la mise en place du barreau 26. Advantageously, each part of the housing 12 is molded with internal arrangements allowing a relatively stable positioning of the various elements making up the breaking mechanism 20, in particular two symmetrical housings for each of the cutoff chambers 24, and a circular central housing for the installation of the bar 26.
Comme, selon un mode particulier de réalisation l'invention, tel que notamment décrit dans la demande de brevet français déposée ce jour au nom de la Demanderesse et intitulée : « Entretoise fonctionnelle de séparation des ampoules dans un dispositif de coupure multipolaire et disjoncteur », les blocs unipolaires 10 sont assemblés par l'intermédiaire d'entretoises 46 pour former une double enveloppe 48. Il est avantageux de tirer parti de cette architecture pour intégrer chaque canal d'écoulement latéral 42 en partie à l'entretoise 46. En particulier, tel qu'illustré à la figure 4, les entretoises 46 sont en plastique moulé et comprennent principalement une cloison centrale 52, destinée à être parallèle aux grandes faces 14 des blocs de coupure 10. La juxtaposition de deux entretoises 46 définit ainsi une cavité 56 dans laquelle vient se loger un bloc de coupure unipolaire 10 ; avantageusement, deux rebords de fond 54 opposés de chaque entretoise 46 referment la cavité 56 sur son arrière de façon sensiblement étanche lors du serrage des entretoises 46 l'une sur l'autre. Chaque entretoise 46 comprend des aménagements permettant de définir en parti les second canaux latéral 42 d'évacuation des gaz. Avantageusement, chaque canal d'écoulement latéral 42 est partiellement gravé dans la grande face externe 14 du boîtier 12 de l'ampoule 10, entre les deux orifices de passage 44A, 44B, et un élément correspondant 68, gravure et/ou contour en saillie, sur la cloison centrale 52. Au moment de la juxtaposition et du serrage de l'entretoise 46 sur l'ampoule 0, il est alors possible de diriger les gaz de l'orifice d'évacuation 44A à l'orifice haut 44B le long de la cloison 52. Les blocs de coupure unipolaires 10 sont destinés à être entraînés simultanément, et sont couplées à cette fin par au moins une tige 30, notamment au niveau du barreau 26, et par exemple par des orifices 32 formant les butées de limitation du pont de contacts mobile 22. Selon un mode de réalisation préféré, une seule tige d'entraînement 30 est utilisée et chaque partie de boîtier 12 comprend un orifice 34 en forme d'arc de cercle permettant au moins la mobilisation de la tige 30 le traversant entre la position de passage du courant et la position d'ouverture. Selon un mode particulier de réalisation l'invention tel que représenté sur les figures 5 à 7, ledit au moins second canal d'échappement des gaz 42 traverse au moins une chambre de décompression 43 comportant au moins une paroi recouverte par une feuille métallique 85. De préférence, la paroi interne recouverte de ladite feuille fait partie d'une chambre de décompression 43. Cette feuille métallique 85 constitue un piège à particules qui a pour objectif d'une part de capter les particules métalliques issues de la coupure, afin de protéger thermiquement les parties plastiques situées en aval du piège et d'autre part de diminuer la température des gaz de coupure. En outre, le piège à particule protège les parties plastiques du canal situées derrière ladite au moins une feuille métallique 85 et renforce l'étanchéité du plan de joint du boîtier 12. As, according to a particular embodiment of the invention, such as in particular described in the French patent application filed today in the name of the Applicant and entitled: "Functional spacer separation of the ampoules in a multipole cut-off device and circuit breaker", 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. In particular, As shown in FIG. 4, 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. The juxtaposition of two spacers 46 thus defines a cavity 56 in which which is housed a unipolar break block 10; advantageously, two opposing bottom flanges 54 of each spacer 46 close the cavity 56 on its rear in a substantially watertight manner when the spacers 46 are tightened one on the other. Each spacer 46 includes arrangements to define in part the second lateral channels 42 of gas evacuation. Advantageously, 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. At the time of the juxtaposition and the clamping of the spacer 46 on the bulb 0, it is then possible to direct the gas from the discharge orifice 44A to the high orifice 44B along of the 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 limiting abutments. of the movable contact bridge 22. According to a preferred embodiment, a single driving rod 30 is used and each housing portion 12 comprises an orifice 34 in the shape of an arc of a circle allowing at least the mobilization of the rod 30. crossing e between the current flow position and the open position. According to a particular embodiment of the invention as represented in FIGS. 5 to 7, said at least second exhaust gas channel 42 passes through at least one decompression chamber 43 comprising at least one wall covered by a metal sheet 85. Preferably, 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. In addition, 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.
L'utilisation d'au moins une feuille métallique 85 recouvrant au moins partiellement la paroi interne du canal d'échappement des gaz permet une bonne captation des billes d'acier et de cuivre en fusion, résultant de l'érosion des séparateurs, des contacts et des conducteurs lors de la coupure. Ladite au moins une feuille métallique comporte une épaisseur minimale pour éviter son transpercement par les billes en fusion. L'épaisseur minimale est de préférence comprise entre 0,3 et 3 mm et est à adapter en fonction de l'énergie de coupure du produit. The use of 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.
Ladite au moins une feuille métallique 85 est en acier, en cuivre ou en alliage à base de fer. Said at least one metal sheet 85 is made of steel, copper or an iron-based alloy.
Comme représenté sur la figure 9A, la paroi interne du canal d'échappement recouverte de ladite au moins une feuille métallique 85 du piège à particules forme un angle a compris entre 45° et 140° par rapport au sens de l'écoulement des gaz. La paroi supportant de ladite au moins une feuille métallique est de préférence dans un plan perpendiculaire au sens de l'écoulement des gaz de coupure (a = 90°). En pratique, en plaçant ladite au moins une feuille métallique 85 dans une courbe ou dans la sortie d'une courbe de l'écoulement des gaz, grâce à la force centrifuge, on favorise le plaquage et l'adhésion des particules contre la feuille. Ladite au moins une feuille métallique 85 recouvre au moins partiellement la surface interne du canal d'évacuation. La feuille métallique s'étend selon l'axe longitudinal du canal. La longueur L totale de paroi interne recouverte de ladite au moins feuille métallique 85 dans le sens de l'écoulement est égale au moins à la racine carrée de la section S d'écoulement la plus faible dudit canal mesurée en amont de ladite feuille. La plus grande longueur possible est souhaitable pour réduire la température des gaz. La longueur minimale requise s'exprime selon l'équation suivante : As shown in FIG. 9A, the inner wall of the exhaust channel covered with said at least one metal sheet 85 of the particle trap forms an angle α of between 45 ° and 140 ° with respect to the direction of gas flow. The supporting wall of said at least one metal foil is preferably in a plane perpendicular to the flow direction of the cleavage gases (a = 90 °). In practice, by placing the at least one metal sheet 85 in a curve or in the exit of a curve of the gas flow, thanks to the centrifugal force, it favors the plating and adhesion of the particles against the sheet. 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:
L≥ S mini L≥ S mini
Avec Smini la surface de la section minimale du canal d'échappement.  With Smini the surface of the minimum section of the exhaust channel.
En outre, ladite au moins une feuille métallique 85 s'étend sur le périmètre interne P du canal d'échappement selon une direction perpendiculaire au sens de l'écoulement des gaz. La distance I minimale requise sur laquelle s'étend ladite feuille s'exprime selon l'équation suivante : Pm/10 < l < Pm In addition, 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 on which said sheet extends is expressed according to the following equation: Pm / 10 <l <Pm
Pm étant le périmètre moyen du canal d'échappement des gaz dans lequel est situé le piège à particules. Where Pm is the average perimeter of the gas exhaust channel in which the particle trap is located.
Ladite chambre de décompression est positionnée de préférence le plus près possible de la sortie de la chambre de coupure d'arc. Selon une mode particulier de réalisation, la chambre de décompression est placée sous la paroi inférieure de la chambre d'extension d'arc 24. Said decompression chamber is preferably positioned as close as possible to the exit of the arc cutting chamber. According to a particular embodiment, the decompression chamber is placed under the bottom wall of the arc extension chamber 24.
Selon une seconde variante des modes de réalisation, un canal d'échappement des gaz 38 comporte un clapet rotatif 45 destiné à être entraîné en rotation par le passage des gaz de coupure. La rotation du clapet d'une première position vers une seconde position est destiné actionner des moyens de déclenchement de l'appareil de coupure pour provoquer l'ouverture des contacts. According to a second variant of the embodiments, a gas exhaust channel 38 comprises a rotary valve 45 intended 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.
Le disjoncteur 100 selon l'invention ainsi obtenu permet de répondre au mieux aux contraintes industrielles a priori antinomiques suivantes : The circuit breaker 100 according to the invention thus obtained makes it possible to best meet the following antinomic industrial constraints:
- la même architecture peut être utilisée pour toute la gamme jusqu'à 800 A grâce à l'utilisation d'une double coupure à pont de contact mobile 22 ; - the same architecture can be used for the entire range up to 800 A through the use of a double break with movable contact bridge 22;
- la fiabilité des mécanismes de coupure 20 et leur optimisation est prouvée par l'utilisation de solution éprouvées ; the reliability of the cutoff mechanisms and their optimization is proven by the use of proven solutions;
- le déclencheur 7 peut être raccordé par le dessous à la plage aval du dispositif de coupure 600, ce qui donne la meilleure accessibilité aux vis de raccordement grâce à une inversion du sens de rotation du pont de coupure rotatif 22 ; - The trigger 7 can be connected from below to the downstream range of the cut-off device 600, which gives the best accessibility to the connection screws by reversing the direction of rotation of the rotary cutoff bridge 22;
- l'interchangeabilité des déclencheurs 7 est complète et permet une différentiation très retardée des appareils de coupure 100 ; - The interchangeability of the triggers 7 is complete and allows a very delayed differentiation of the switchgear 100;
- le nez 9 du dispositif de coupure 600 est centré, en particulier à 42,5 mm, grâce à l'inversion du sens de rotation dans les blocs de coupure 10, ce qui permet d'utiliser des plastrons symétriques dans les armoires ; the nose 9 of the cut-off device 600 is centered, in particular at 42.5 mm, thanks to the reversal of the direction of rotation in the cut-off blocks 10, which makes it possible to use symmetrical plastrons in the cabinets;
- les gaz de coupure ne sont pas évacués à côté du déclencheur 7, ce qui limite la pollution sur cet élément qui peut être sensible, notamment dans sa version électronique, et libère du volume ; the cutoff gases are not evacuated next to the trip unit 7, which limits the pollution on this element which can be sensitive, in particular in its electronic version, and frees up the volume;
- l'échappement des gaz de coupure n'est pas non plus réalisé sous les raccordements 4, 5 du disjoncteur 100, ce qui limite les risques d'amorçage en coupure ; the exhaust gas cutoff is also not carried out under the connections 4, 5 of the circuit breaker 100, which limits the risks of ignition in cutoff;

Claims

REVENDICATIONS
Bloc de coupure unipolaire comprenant : Unipolar break block comprising:
un pont de contacts rotatif (22),  a rotary contact bridge (22),
au moins un contact fixe (41 , 51 ) coopérant avec ledit pont de contacts et relié à un conducteur (4, 5) d'amenée de courant,  at least one fixed contact (41, 51) cooperating with said contact bridge and connected to a current supply conductor (4, 5),
un barreau rotatif (26) ayant un orifice transversal de logement (21) avec jeu dudit pont de contacts, lequel fait saillie de part du barreau (20), ledit barreau rotatif (20) étant intercalé entre deux faces latérales ( 4) du bloc de coupure, lesdites faces latérales étant sensiblement parallèles  a rotary bar (26) having a transverse housing opening (21) with play of said contact bridge, which protrudes from the bar (20), said rotary bar (20) being interposed between two lateral faces (4) of the block of cutting, said lateral faces being substantially parallel
deux flasques d'étanchéité (27) placés respectivement entre les faces radiales du barreau rotatif (26) et les faces latérales (14) afin d'assurer une étanchéité entre l'intérieur et l'extérieur du bloc de coupure,  two sealing flanges (27) placed respectively between the radial faces of the rotary bar (26) and the lateral faces (14) to ensure a seal between the inside and the outside of the cutoff block,
au moins une chambre d'extinction d'arc (24) s'ouvrant sur un volume d'ouverture du pont de contacts (22),  at least one arc extinguishing chamber (24) opening on an opening volume of the contact bridge (22),
caractérisé en ce que le barreau rotatif (26) comporte au moins un canal (29) en liaison direct entre l'orifice transversal de logement (21) et une face radiale de manière à ce que les gaz de coupure puissent circuler  characterized in that the rotary bar (26) comprises at least one channel (29) directly connected between the transverse housing orifice (21) and a radial face so that the cutting gases can circulate.
directement via ledit canal vers au moins un flasque d'étanchéité (27) afin de le pousser contre une des faces latérales (14) pour assurer une étanchéité.  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.
Bloc de coupure selon la revendication 1 , caractérisé en ce que le barreau rotatif (26) comporte deux canaux (29) respectivement en liaison entre l'orifice transversal de logement (21) et une face radiale de manière à ce que les gaz de coupure puissent circuler directement via lesdits canaux vers les flaques d'étanchéité (27) afin de les pousser contre les faces latérales (14) pour assurer une étanchéité. Cutoff block according to claim 1, characterized in that the rotary bar (26) has two channels (29) respectively connected between the transverse housing orifice (21) and a radial face so that the cutoff gases can flow directly via said channels to the sealing flanges (27) to push them against the side faces (14) to provide a seal.
3. Bloc de coupure selon la revendication 1 , caractérisé en ce que le barreau rotatif (26) comporte un canal (29) débouchant et traversant de part et d'autre le barreau rotatif (26) d'une première à une seconde face radiale. 3. Cutoff unit according to claim 1, characterized in that the rotary bar (26) comprises a channel (29) opening and through on both sides the rotary bar (26) of a first to a second radial face .
4. Bloc de coupure selon la revendication 3, caractérisé en ce que le canal (29) débouchant comporte un axe longitudinal parallèle à un axe longitudinal du barreau rotatif (26). 4. Cutoff unit according to claim 3, characterized in that the channel (29) opening comprises a longitudinal axis parallel to a longitudinal axis of the rotary bar (26).
5. Bloc de coupure selon la revendication 4, caractérisé en ce que le canal (29) débouchant comporte un axe longitudinal aligné avec un axe longitudinal du barreau rotatif (26) de manière à ce que les gaz de coupure puissent exercer une force de poussée sensiblement alignée avec l'axe longitudinal dudit barreau et répartie uniformément sur les flasques d'étanchéité (27). 5. Cutoff unit according to claim 4, characterized in that the channel (29) opening comprises a longitudinal axis aligned with a longitudinal axis of the rotary bar (26) so that the cutoff gases can exert a thrust force substantially aligned with the longitudinal axis of said bar and distributed evenly over the sealing flanges (27).
6. Bloc de coupure selon l'une quelconque des revendications précédentes, caractérisé en ce que les flasques d'étanchéité (27) comportent des joues latérales recouvrant au moins partiellement la surface longitudinale du barreau rotatif (26). 6. Cutoff unit according to any one of the preceding claims, characterized in that the sealing flanges (27) comprise lateral cheeks at least partially covering the longitudinal surface of the rotary bar (26).
7. Bloc de coupure selon la revendication 6, caractérisé en ce que les joues latérales ferment partiellement l'orifice transversal de logement (21) du barreau rotatif (26). 7. Cutoff unit according to claim 6, characterized in that the lateral cheeks partially close the transverse housing hole (21) of the rotary bar (26).
8. Bloc de coupure selon la revendication 6 ou 7, caractérisé en ce que les Cutoff block according to Claim 6 or 7, characterized in that the
joues latérales sont positionnées sur tout le pourtour cylindrique du flasque d'étanchéité (27).  side cheeks are positioned all around the cylindrical periphery of the sealing flange (27).
9. Bloc de coupure selon l'une des revendications précédentes, caractérisé en ce que les flasques d'étanchéité (27) comportent au moins un trou de passage9. Cutoff unit according to one of the preceding claims, characterized in that the sealing flanges (27) comprise at least one through hole
(32) excentré destiné au passage de barre de liaison (30) pour solidariser mécaniquement plusieurs barreaux rotatifs (26), les barres de liaison (30) étant commandées par un mécanisme commun à l'ensemble de plusieurs blocs unipolaires. 10. Bloc de coupure selon l'une des revendications précédentes, caractérisé en ce qu'il comporte : (32) eccentré for the passage of connecting bar (30) for mechanically fastening several rotary bars (26), the connecting bars (30) being controlled by a mechanism common to the set of several unipolar blocks. 10. Cutoff unit according to one of the preceding claims, characterized in that it comprises:
- une paire de contacts fixes (4 , 51 ), chaque contact fixe coopérant avec le pont de contacts rotatif (22) et un conducteur (4, 5) d'amenée de courant ; - deux chambres d'extinction d'arc (24) s'ouvrant respectivement sur un volume d'ouverture du pont de contacts (22), a pair of fixed contacts (4, 51), each fixed contact cooperating with the rotating contact bridge (22) and a current supply conductor (4, 5); two arc extinguishing chambers (24) respectively opening on an opening volume of the contact bridge (22),
- chaque chambre de coupure (24) étant reliée à au moins un canal d'échappement des gaz de coupure (38, 42), lesdits canaux d'échappement étant débouchant sur une face amont du boîtier (12) du bloc de coupure (10), ladite face amont étant positionnée à l'opposé d'une autre face aval destinée à être placée en contact avec des moyens de déclenchement (7).  each cut-off chamber (24) being connected to at least one exhaust gas channel (38, 42), said exhaust ducts opening onto an upstream face of the casing (12) of the cut-off block (10); ), said upstream face being positioned opposite another downstream face intended to be placed in contact with triggering means (7).
11. Bloc de coupure selon la revendication 10, caractérisé en ce que lesdits 11. Cutoff unit according to claim 10, characterized in that said
canaux d'échappement des gaz de coupure (38, 42) se réunissent dans un conduit commun débouchant sur la face amont du boîtier ( 2) du bloc de coupure (10).  exhaust channels of the cutoff gases (38, 42) meet in a common duct leading to the upstream face of the casing (2) of the cutoff block (10).
12. Bloc de coupure selon la revendication 11 , caractérisé en ce que les canaux d'échappement des gaz coupure (38, 42) respectivement d'une première et seconde chambres de coupure (24) sont de longueur différente, les gaz de coupure circulant dans un canal d'échappement étant destiné à aspirer par effet Venturi les gaz circulant dans un second canal d'échappement.  12. Cutoff unit according to claim 11, characterized in that the exhaust gas channels (38, 42) respectively of a first and second breaking chambers (24) are of different length, the cutoff gases flowing in an exhaust channel being intended to suck by the Venturi effect the gases flowing in a second exhaust channel.
13. Bloc de coupure selon l'une des revendications 10 à 12, caractérisé en ce que ledit au moins un canal d'échappement des gaz (42) d'une chambre de coupure d'arc (24) traverse au moins une chambre de décompression (43) comportant au moins une paroi interne recouverte par une feuille métallique (85). 13. Cutoff block according to one of claims 10 to 12, characterized in that said at least one exhaust gas channel (42) of an arc cutting chamber (24) passes through at least one chamber of decompression device (43) having at least one inner wall covered by a metal sheet (85).
14. Dispositif de coupure (600) comportant au moins un bloc de coupure (10) selon les revendications précédentes, caractérisé en ce qu'il comporte un mécanisme (8) d'actionnement des contacts, ledit au moins un bloc de coupure étant destiné à être raccordé d'une part au déclencheur 7 au niveau de la plage aval 5 et d'autre part à une ligne de courant à protéger au niveau d'une plage amont 4.  14. Cutoff device (600) comprising at least one cutoff unit (10) according to the preceding claims, characterized in that it comprises a mechanism (8) for actuating the contacts, said at least one cutoff block being intended to be 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 an upstream range 4.
15. Disjoncteur (100) comportant un dispositif de coupure (600) selon la 15. Circuit breaker (100) having a cut-off device (600) according to the
revendication 14, caractérisé en ce qu'il comporte un déclencheur (7) connecté aux plages aval (5) du dispositif de coupure (600).  claim 14, characterized in that it comprises a trigger (7) connected to the downstream ranges (5) of the cut-off device (600).
EP10762709.3A 2009-09-18 2010-08-30 Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device Active EP2478544B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10762709T PL2478544T3 (en) 2009-09-18 2010-08-30 Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0904455A FR2950473B1 (en) 2009-09-18 2009-09-18 CUTTING DEVICE HAVING EFFICIENT MEANS FOR EXHAUSTING CUTTING GASES
FR0904456A FR2950471B1 (en) 2009-09-18 2009-09-18 UNIPOLAR CUT-OFF BLOCK COMPRISING A ROTARY CONTACTING BRIDGE, CUTTING DEVICE COMPRISING SUCH A BLOCK AND CIRCUIT BREAKER COMPRISING SUCH A DEVICE
PCT/FR2010/000591 WO2011033181A1 (en) 2009-09-18 2010-08-30 Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device

Publications (2)

Publication Number Publication Date
EP2478544A1 true EP2478544A1 (en) 2012-07-25
EP2478544B1 EP2478544B1 (en) 2015-01-14

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EP10762709.3A Active EP2478544B1 (en) 2009-09-18 2010-08-30 Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device

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Country Link
US (1) US20120175348A1 (en)
EP (1) EP2478544B1 (en)
JP (1) JP5697671B2 (en)
KR (1) KR101539832B1 (en)
CN (1) CN102612723B (en)
BR (1) BR112012005824B1 (en)
MX (1) MX2012003123A (en)
PL (1) PL2478544T3 (en)
RU (1) RU2538785C2 (en)
WO (1) WO2011033181A1 (en)

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Also Published As

Publication number Publication date
US20120175348A1 (en) 2012-07-12
BR112012005824B1 (en) 2020-12-08
JP2013505525A (en) 2013-02-14
CN102612723B (en) 2015-08-12
WO2011033181A1 (en) 2011-03-24
KR20120083337A (en) 2012-07-25
JP5697671B2 (en) 2015-04-08
BR112012005824A2 (en) 2016-03-08
PL2478544T3 (en) 2015-06-30
RU2012115452A (en) 2013-10-27
CN102612723A (en) 2012-07-25
RU2538785C2 (en) 2015-01-10
EP2478544B1 (en) 2015-01-14
KR101539832B1 (en) 2015-07-27
MX2012003123A (en) 2012-04-10

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