EP0189689B1 - Interrupteur électrique à écran - Google Patents

Interrupteur électrique à écran Download PDF

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Publication number
EP0189689B1
EP0189689B1 EP85402426A EP85402426A EP0189689B1 EP 0189689 B1 EP0189689 B1 EP 0189689B1 EP 85402426 A EP85402426 A EP 85402426A EP 85402426 A EP85402426 A EP 85402426A EP 0189689 B1 EP0189689 B1 EP 0189689B1
Authority
EP
European Patent Office
Prior art keywords
screen
arc
contact elements
contact
edge
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
Application number
EP85402426A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0189689A1 (fr
Inventor
Elie Belbel
André Haury
Christian Blanchard
Michel Lauraire
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT85402426T priority Critical patent/ATE44110T1/de
Publication of EP0189689A1 publication Critical patent/EP0189689A1/fr
Application granted granted Critical
Publication of EP0189689B1 publication Critical patent/EP0189689B1/fr
Expired 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
    • H01H9/32—Insulating body insertable between contacts

Definitions

  • the invention relates to a screen switch device having, on the one hand, two contact parts movable with respect to each other between a closed state where the contact pads touch each other, and an open state where the pads are separated and, on the other hand, an insulating screen which comes to interpose the pellets by performing from a starting position towards a working position, a movement during which the arc appearing at the opening is moved by an active edge of the screen and at the end of which the arc is completely destabilized against insulating walls.
  • Electric switches are already known using arc deflector devices, which take the form of horns placed in the vicinity of the contact pads on the free ends of the contact parts, and which have, with respect to the general direction of these parts , a change of orientation such as the natural development of the arc effected under the effect of electrodynamic repulsion forces, brings the feet of these arcs on these horns and consequently avoids their parking on said pellets.
  • the orientations, curvatures, shapes or positions given to these horns are essentially based on the assumption that the current flowing in the arc is high enough for this development to be possible; the same measures can be taken if a development or a swelling of the arc is assisted by the presence of a local magnetic field, which can be induced or permanent and which is suitably oriented to favor the speed of displacement.
  • the desired increase in the arc voltage results from its elongation, while the fact of installing the feet of these arcs on the horns avoids consumption of the noble metal of the contact pads; in these known devices, the orientations of these horns are generally divergent and the arc elongation phenomenon can be accelerated by the use of an insulating screen passing between the contact pads, as described in the patents FR-A-1 541 810 and FR-A-1 238 660.
  • the invention therefore proposes to bring to a screen switch, the general constitution of which corresponds to that which is mentioned above, improvements capable of considerably reducing the wear of the contact pads and, consequently, to practically eliminate the drawbacks which result therefrom, in particular when the size of the switch, the level of fault currents to be interrupted and the size of the device which uses it, make it difficult to implement other means.
  • the switch device comprises, on the one hand, two contact elements, respectively carried by two support parts, at least one of which is movable relative to the other, between a closed state where the contact elements touch and an open state where the contact elements are separated from each other and, on the other hand, an insulating screen which comes quickly to come between the contact elements by carrying out, from a starting position, towards a working position, a movement during which the arc appearing at the opening is moved along conductive deflectors which extend the support parts, beyond the contact elements , by an active edge of the screen, displacement at the end of which the arc is completely destabilized against insulating walls.
  • This switching device is more particularly characterized in that the above deflectors are oriented and / or shaped so that for each pair of positions of the contact elements and of the edge of the screen, following the passage of said edge between the elements contact, there is, at each instant, between two points of these extensions, a possible arc path which passes through a point of said edge and which is shorter than the path passing at the same time through the contact elements and said point from the edge, and in that it comprises means for propelling the screen designed so that said screen arrives with a high speed between the two contact elements, when these two elements are separated one of the '' by a distance slightly greater than its thickness, so that, thanks to the above-mentioned conformation of the extensions and at said speed of the screen, the arc moves with a minimum elongation up to the vicinity of said walls, following said possible path at all times.
  • a switch 1, see FIG. 1, implementing the invention mainly comprises a first contact piece 2 which, here, is fixed, and which therefore carries a fixed contact pad 4, a movable contact piece 3 which, here , is represented by a lever 5 pivoting about an axis 9 and carrying a movable contact 7, elastic means 6 which provide the necessary contact pressure, a flexible current supply conductor 11, a mechanical means 10 making it possible to operate the opening of the contacts, a thin insulating screen 17, which is guided in an insulating housing 12 for example along grooves 13 thereof to establish effective isolation between its two opposite faces, and a slot or transverse groove 14 , which is carried by a wall 15 of the housing, which is connected to an expansion channel 19, and which is placed close to the switch to receive the edge 16 of the screen when the latter moves to the left between a starting or rest point 10, and a point t arrival or work 8.
  • the screen 17 can, for example, be propelled at the moment of the appearance of an overcurrent of current J by the mechanism 10 when the latter is released by the effects of a coil 26 placed in series in the circuit 18 which also includes a conductor 27 between terminals 24, 25; in a first variant, the screen can be propelled by a previously armed elastic means 29 which is itself released by a pallet, or core, or striker 30 associated with the coil 26 or by the mechanism 10.
  • Resetting means not illustrated make it possible to restore to the mobile contact and to the screen, after automatic opening, rest positions identical to those of FIG. 1.
  • the edge of the screen arrives with a high speed between the two contact pads. when these are temporarily separated by an amount slightly greater than its thickness -e-. It then operates a destabilization of the arc when it abuts against the wall or when the front edge of the screen enters the slot 14 when it exists.
  • the contact pieces have been provided with conductive extensions, deflectors 20 and 21 respectively, which are directed in the directions of movement Q of the screen, and whose facing surfaces 22, 23, unlike the previous arrangements of the horns, do not diverge significantly, at least in regions immediately adjacent to these pellets.
  • the breaking chamber 28 and therefore the movement of the movable contact are small.
  • the surfaces where the arc feet circulate preferably extend as far as the vicinity of the slot in the housing into which the end of the screen penetrates, and that the angular travel performed by the movable contact when carried by a pivoting lever, must not be too high so as not to establish for a certain relative position of the screen and the lever, a shorter path than that existing during a immediately preceding relative position.
  • the extension 21 which is substantially parallel to the region 22 adjacent to the patch fixed contact 4 at the time of opening, forms an angle P with the general direction of the lever passing through points 9 and 7, while the deflector 20 itself has a surface 22a forming an angle 8 with the general direction of conductor support 2, itself parallel to the screen.
  • the angular travel of the lever is here also relatively small, which allows the use of a mechanism 10 of reduced volume.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Push-Button Switches (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Cookers (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Switches With Compound Operations (AREA)
  • Automatic Disk Changers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP85402426A 1984-12-28 1985-12-06 Interrupteur électrique à écran Expired EP0189689B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85402426T ATE44110T1 (de) 1984-12-28 1985-12-06 Elektrischer schalter mit blende.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8419993A FR2575589B1 (fr) 1984-12-28 1984-12-28 Interrupteur electrique a ecran
FR8419993 1984-12-28

Publications (2)

Publication Number Publication Date
EP0189689A1 EP0189689A1 (fr) 1986-08-06
EP0189689B1 true EP0189689B1 (fr) 1989-06-14

Family

ID=9311085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85402426A Expired EP0189689B1 (fr) 1984-12-28 1985-12-06 Interrupteur électrique à écran

Country Status (14)

Country Link
US (1) US4659888A (it)
EP (1) EP0189689B1 (it)
JP (1) JPS61161626A (it)
AT (1) ATE44110T1 (it)
BR (1) BR8506471A (it)
CA (1) CA1250010A (it)
CH (1) CH666764A5 (it)
DE (1) DE3544864C2 (it)
ES (1) ES8703676A1 (it)
FR (1) FR2575589B1 (it)
GB (1) GB2169141B (it)
IE (1) IE57188B1 (it)
IT (1) IT1186171B (it)
ZA (1) ZA859818B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3680902D1 (de) * 1986-01-10 1991-09-19 Matsushita Electric Works Ltd Ausschalter.
DE3770516D1 (de) * 1986-04-04 1991-07-11 Telemecanique Electrique Elektrischer schalter fuer schutzgeraet, wie schutzschalter.
FR2621418B1 (fr) * 1987-10-02 1989-12-22 Telemecanique Electrique Interrupteur de protection a ecran de coupure d'arc
FR2621417B1 (fr) * 1987-10-02 1989-12-22 Telemecanique Electrique Interrupteur de protection a ecran de coupure d'arc
DE3823790A1 (de) * 1988-07-14 1990-01-18 Asea Brown Boveri Elektrisches installationsgeraet mit kontakttrennwand
DE19710880B4 (de) * 1997-03-15 2007-11-15 Moeller Gmbh Lichtbogenlöscheinrichtung
DE19735521A1 (de) * 1997-08-16 1999-02-18 Kloeckner Moeller Gmbh Lichtbogenlöscheinrichtung für einen kurzschlußstrombegrenzenden Niederspannungsschalter
JP5758169B2 (ja) * 2011-03-31 2015-08-05 Ｎｋｋスイッチズ株式会社 消弧装置付き直流電流遮断用小形スイッチ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR570840A (fr) * 1923-10-04 1924-05-07 Interrupteur à air à action rapide
US2020935A (en) * 1932-05-25 1935-11-12 Westinghouse Electric & Mfg Co Circuit interrupter
FR1238660A (fr) * 1958-10-16 1960-08-12 Siemens Ag Dispositif pour allonger les arcs électriques
FR1541810A (fr) * 1967-09-01 1968-10-11 Comp Generale Electricite Appareil électrique de coupure à rupture rapide
US3549840A (en) * 1968-07-18 1970-12-22 S & C Electric Co Switch construction with load break device
DE1957620A1 (de) * 1969-11-15 1971-05-27 Karl Ahrens Leistungsschalter
US3842228A (en) * 1973-08-27 1974-10-15 Us Navy Circuit breaker assembly with interposed wedge non-conductor and complementary housing arc-prevention structure
FI49890C (fi) * 1974-03-12 1975-10-10 Ahlstroem Oy Sähköinen katkaisulaite.
US3978300A (en) * 1975-02-11 1976-08-31 Westinghouse Electric Corporation Low-voltage circuit-breaker having small contact separation and small gap between cooperating parallel-arranged arcing-rails
FR2511185A1 (fr) * 1981-08-07 1983-02-11 Telemecanique Electrique Dispositif automatique de limitation de courants de court-circuit
FR2540665B1 (fr) * 1983-02-04 1987-02-27 Telemecanique Electrique Dispositif interrupteur muni d'un ecran isolant s'interposant entre les contacts lors de la coupure et de moyen de cisaillement de l'arc entre cet ecran et une paroi isolante

Also Published As

Publication number Publication date
FR2575589B1 (fr) 1987-02-06
US4659888A (en) 1987-04-21
IT1186171B (it) 1987-11-18
ES8703676A1 (es) 1987-02-16
GB2169141A (en) 1986-07-02
GB2169141B (en) 1989-06-07
IT8523341A0 (it) 1985-12-20
CH666764A5 (fr) 1988-08-15
IE853309L (en) 1986-06-28
ATE44110T1 (de) 1989-06-15
FR2575589A1 (fr) 1986-07-04
CA1250010A (fr) 1989-02-14
BR8506471A (pt) 1986-09-02
GB8530582D0 (en) 1986-01-22
DE3544864A1 (de) 1986-07-10
EP0189689A1 (fr) 1986-08-06
DE3544864C2 (de) 1995-09-07
IE57188B1 (en) 1992-05-20
JPS61161626A (ja) 1986-07-22
ES550490A0 (es) 1987-02-16
ZA859818B (en) 1986-09-24

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