EP0657907B1 - Dispositif de rupture de courant d'appareil interrupteur notamment pour contacteur ou contacteur-disjoncteur - Google Patents

Dispositif de rupture de courant d'appareil interrupteur notamment pour contacteur ou contacteur-disjoncteur Download PDF

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Publication number
EP0657907B1
EP0657907B1 EP19940402646 EP94402646A EP0657907B1 EP 0657907 B1 EP0657907 B1 EP 0657907B1 EP 19940402646 EP19940402646 EP 19940402646 EP 94402646 A EP94402646 A EP 94402646A EP 0657907 B1 EP0657907 B1 EP 0657907B1
Authority
EP
European Patent Office
Prior art keywords
deflector
contact
fixed
top plate
bottom plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19940402646
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0657907A1 (fr
Inventor
Bruno Jacquet
Dominique Leglaye
Jean-Pierre Duchemin
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 SE
Original Assignee
Schneider Electric SE
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9453675&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0657907(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0657907A1 publication Critical patent/EP0657907A1/fr
Application granted granted Critical
Publication of EP0657907B1 publication Critical patent/EP0657907B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts

Definitions

  • the present invention relates to a double current breaking device housed in the breaking chamber of a housing of a switch device, in particular of a contactor or contactor-circuit breaker.
  • This device comprises a bridge of movable contacts, each contact being provided with a contact pad which cooperates with a contact pad of a fixed contact support, the contact bridge moving in translation along the axis XX 'passing through the fixed and mobile contact pads.
  • This device also comprises, associated with deionization fins, a bent arc deflector taking the general shape of a U, comprising a solid bottom flange, and an upper range substantially parallel to the bottom flange, interconnected by bridges, the upper section having a V or Y-shaped cutout surrounding the fixed contact pad and being situated between the fixed contact support and the contact bridge when the contacts are closed.
  • a bent arc deflector taking the general shape of a U, comprising a solid bottom flange, and an upper range substantially parallel to the bottom flange, interconnected by bridges, the upper section having a V or Y-shaped cutout surrounding the fixed contact pad and being situated between the fixed contact support and the contact bridge when the contacts are closed.
  • Patent FR-A-2 378 344 describes a U-shaped blowing piece electrically and mechanically connected to the fixed U-shaped contact support. It is known that the use of a J-shaped contact support or of U promotes the pole breaking capacity, that is to say the maximum current it can cut under a given voltage. On the other hand, this shape disadvantages the closing power of the contactor pole, that is to say the maximum current that it can withstand under a given voltage. Indeed, to obtain the best closing power, the current line must be as straight as possible to limit the repulsion effect.
  • GB-A-2 163 293 describes a single-break device comprising a movable contact bridge having a rotational movement, an arc deflector associated with a fixed contact support which may be flat, and deionization fins.
  • the purpose of this patent is to move the arc appearing between the contact pads when the contacts open, thereby creating a distance between the arc feet less than the opening distance of the contact pads.
  • the object is achieved by the presence of a horn at the end of the movable bridge as well as by the inclination of the upper range of the deflector relative to its lower range.
  • this device providing a distance between the arc feet less than that of opening the contact pads makes it possible to move the arc, but does not stretch it before it is split into the fins; this travel time can be considered a waste of time on cooling the arc, for example.
  • the cut is no longer ensured at the level of the silver pellets but on copper or steel parts which are damaged more quickly thereby reducing the service life of the device.
  • this device with this type of deflector, generates too much bulk.
  • the invention proposes to limit the repulsion on closing by associating a U-shaped deflector and a flat contact support electrically and mechanically connected to this deflector.
  • the geometrical configuration of the device according to the invention makes it possible to obtain a distance between the arc feet at least equal to the opening distance of the contacts, which thus avoids any early displacement of the electric arc and allows its immediate elongation; indeed the displacement without elongation generates a loss of time.
  • the arc is stretched quickly towards the deionization fins where it is split, achieving a better and faster cut.
  • the results obtained thanks to the device according to the invention have also shown a homogeneous wear of the pellets as well as cuts reached with a low number of zeros leading consequently to a faster cutting.
  • the number of zeros corresponds to the number of zero crossings of the current after the separation of the contacts before the current is finally canceled at one of these passages, and allows the beginning of a cut.
  • the invention also proposes to improve the mechanical and thermal behavior of the sub-assembly formed by the deflector and the fixed contact support. Finally, this arrangement allows a smaller footprint of the arc chamber, an improvement in manufacturing time and cost price in material.
  • the device according to the invention is characterized in that the fixed contact support is a solid, flat and unfolded part which rests on the upper face of the lower flange flange and that the upper range of the deflector and the fins are parallel in the plane of the contact bridge.
  • the upper range and the lower flange of the deflector are flat.
  • the fixed contact support is made integral with the lower flange of the deflector.
  • the deflector is produced by cutting, and folding of the same ferro-magnetic sheet.
  • the upper area of the deflector is not in contact with the contact support so as to create an insulating space over the entire length of the deflector.
  • the closed V-shaped or Y-shaped cutout of the deflector is a notch which narrows by forming a circular contour towards the edge of the upper area near the housing.
  • the fins are mounted between flanges to which they are fixed.
  • the fins open freely between the flanges.
  • the current breaking device is part of a switching device, for example of the contactor type having at least one double break pole. Only half of the device is illustrated in Figures 1 to 6 for the sake of simplicity in the drawing.
  • This device is contained in the breaking chamber of an insulating housing 5 and comprises a movable contact bridge 20 mounted in the contact holder 2.
  • the movable contact bridge 20 is provided with two pads 21. Each contact pad 21 of this bridge 20 cooperates with a fixed contact pad 11 which is fixed to the end 12 of a contact support 10 which can be connected to a connection terminal 50.
  • the mobile contact bridge moves in translation relative to the fixed contacts, remaining perpendicular to a line XX 'which passes through the fixed and mobile contacts, this mobile contact moving along this line XX'.
  • the plane of movement and symmetry of the bridge of movable contacts is marked PP '.
  • the contact support 10 is a solid, flat and unfolded part. It has a lower face 101 and an upper face 102.
  • the contact support 10 is connected to a deflector 3.
  • This deflector is made in one piece and has a general U shape. It comprises a lower sole 31 for fixing the contact support, an upper range 32 of deflection which is substantially parallel to the bottom flange 31.
  • the bottom flange and the pad are connected by two lateral bridges 331 and 332 folded in an arc of a circle and forming the hollow of the U of the deflector.
  • the upper pad 32 is located between the contact support and the contact bridge 20 when the contacts are closed.
  • the area 32 is parallel to the plane of the contact bridge, that is to say perpendicular to XX ′, and its surface is placed substantially at the level of the contact face of the fixed contact pad so as to produce, during opening of the contacts, a distance between the arc feet at least equal to the opening distance of the contacts.
  • the area 32 has a closed notch 36, in the form of V or Y, surrounding the fixed contact pad 11. This closed notch narrows, forming a circular contour 36 ', towards the edge 32' of the upper area 32, side connection terminal and widens up to the end 31 'of the lower flange 31, on the contact carrier side.
  • This edge 32 ′ is located in the plane of the upper area 32 near the housing 5.
  • the notch 36 thus separates the two folded bridges 331 and 332 originating at the end 31 ′ of the lower sole 31, and on the other hand divides the upper range 32 into two ranges 321 and 322. These two ranges 321 and 322 are connected respectively to bridges 331 and 332 and meet on the connection terminal side.
  • the lower flange 31 of the deflector is full and its upper face 31a is welded to the contact support 10, on the side of the lower face 101, thereby determining a large contact surface S and by ensuring an excellent electrical, mechanical and thermal connection between this deflector and this support.
  • the upper area 32 of the deflector is not in contact with the upper face 102 of the support, so as to create an insulating space e over its entire length.
  • the solid bottom flange of the deflector has a slot 311 in the middle over a small width and over its entire length, the U shape of the deflector and the shape of the remaining contact piece identical; this configuration does not affect the technical advantages of the device in any way.
  • the contact support 10 is fixed to the housing by a screw 35 passing through a bore in a partition of the housing. During assembly, after tightening the screw, the lower area of the deflector is clamped between the support and the housing, which ensures the fixing of the deflector. This assembly provides an electrical and mechanical connection between the deflector and the support.
  • the deflector is associated with an arc cut-out frame 8, comprising flanges 81 and 82 and deionization fins 83.
  • the flanges maintain the fins.
  • These flanges 81 and 82 are adjacent to the partitions of the breaking chamber. They have a substantially rectangular shape and rise perpendicular to the deflector and are parallel to the plane PP '.
  • the fins 83 are parallel to the plane of the upper area of the deflector, that is to say perpendicular to XX '. They are mounted between the flanges 81 and 82 by means of tenons which engage in suitable cutouts, formed in the flanges 81 and 82.
  • the fins 83 have a generally substantially rectangular shape and have a concave edge 83a on the contact bridge side. They are spaced from each other, and all of the edges 83a can extend in a direction ZZ 'parallel to the axis XX' or, in a variant not shown, a direction ZZ 'oriented so that the distance from this plane at axis XX ′ is the smallest at the level of the fin closest to the deflector and is the largest at the level of the fin farthest from the deflector. Finally, the fins 83 open freely behind the frame 8, connection terminal side, at the edge 32 'of the upper area 32 of the deflector.
  • the deflector was produced by cutting, folding the same ferro-magnetic sheet so that the magnetic and electrical continuity, as well as great simplicity of manufacture, are simultaneously ensured.
  • the electric current creates a magnetic field in the ferromagnetic deflector. This field generates a blowing force of the arc parallel to the deflector and oriented towards the fins.
  • the arc 90 arising between the contact pads is then pushed sideways, it cools by lengthening and hanging on the fins 83, one of the feet of the arc resting on the range 321 or 322 of the upper range 32, and finally divides before its final extinction.
  • the current flowing through the U or Y shape of the deflector creates a repulsive force on the movable bridge improving the breaking capacity.
  • the electric arc is less important and the short distance separating the region 9 of the fins allows the arc to reach the fins.
  • the contact support is formed of two flat solid pieces and not folded screwed together, thus allowing the change of the fixed contact.
  • the contact support of the deflector could be made integral by riveting or crimping. Alternatively, a combination of the various fasteners described may be possible.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP19940402646 1993-12-06 1994-11-21 Dispositif de rupture de courant d'appareil interrupteur notamment pour contacteur ou contacteur-disjoncteur Expired - Lifetime EP0657907B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9314694A FR2713391B1 (fr) 1993-12-06 1993-12-06 Dispositif de rupture de courant d'appareil interrupteur notamment pour contacteur ou contacteur-disjoncteur.
FR9314694 1993-12-06

Publications (2)

Publication Number Publication Date
EP0657907A1 EP0657907A1 (fr) 1995-06-14
EP0657907B1 true EP0657907B1 (fr) 1997-04-09

Family

ID=9453675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940402646 Expired - Lifetime EP0657907B1 (fr) 1993-12-06 1994-11-21 Dispositif de rupture de courant d'appareil interrupteur notamment pour contacteur ou contacteur-disjoncteur

Country Status (9)

Country Link
EP (1) EP0657907B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CN (1) CN1046372C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CZ (1) CZ306294A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE69402515T2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2100028T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2713391B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
HU (1) HU216562B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
PL (1) PL306136A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
TW (1) TW277136B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581063A (en) * 1995-06-26 1996-12-03 Square D Company Arc-resistant shield for protecting a movable contact carrier of a circuit breaker
FR2761194B1 (fr) * 1997-03-20 1999-04-30 Schneider Electric Sa Pole de coupure d'un appareil interrupteur electrique
JP6655792B2 (ja) 2014-05-12 2020-02-26 パナソニックＩｐマネジメント株式会社 接点装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2378344A1 (fr) * 1977-01-25 1978-08-18 Telemecanique Electrique Piece de soufflage
DE3337515A1 (de) * 1983-10-14 1985-05-02 Siemens AG, 1000 Berlin und 8000 München Schaltstueck fuer elektrische schaltgeraete
US4652707A (en) * 1983-12-07 1987-03-24 Mitsubishi Denki Kabushiki Kaisha Power switch
EP0165332B1 (en) * 1984-06-22 1989-05-31 Mitsubishi Denki Kabushiki Kaisha Electric power switch
FR2569304B1 (fr) * 1984-08-15 1990-12-28 Mitsubishi Electric Corp Interrupteur de circuit

Also Published As

Publication number Publication date
CZ306294A3 (en) 1995-06-14
HU9403489D0 (en) 1995-02-28
PL306136A1 (en) 1995-06-12
FR2713391B1 (fr) 1995-12-29
EP0657907A1 (fr) 1995-06-14
ES2100028T3 (es) 1997-06-01
HU216562B (hu) 1999-07-28
DE69402515T2 (de) 1997-07-17
TW277136B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1996-06-01
DE69402515D1 (de) 1997-05-15
FR2713391A1 (fr) 1995-06-09
CN1046372C (zh) 1999-11-10
HUT69805A (en) 1995-09-28
CN1109630A (zh) 1995-10-04

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