EP0074288A1 - Automatische Begrenzungsvorrichtung für Kurzschlussströme - Google Patents

Automatische Begrenzungsvorrichtung für Kurzschlussströme Download PDF

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Publication number
EP0074288A1
EP0074288A1 EP82401380A EP82401380A EP0074288A1 EP 0074288 A1 EP0074288 A1 EP 0074288A1 EP 82401380 A EP82401380 A EP 82401380A EP 82401380 A EP82401380 A EP 82401380A EP 0074288 A1 EP0074288 A1 EP 0074288A1
Authority
EP
European Patent Office
Prior art keywords
levers
screen
housing
contact
switch device
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
EP82401380A
Other languages
English (en)
French (fr)
Other versions
EP0074288B1 (de
Inventor
Elie Belbel
Louis Fechant
André Haury
Michel Lauraire
Lucien Siffroi
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9261399&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0074288(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT82401380T priority Critical patent/ATE13106T1/de
Publication of EP0074288A1 publication Critical patent/EP0074288A1/de
Application granted granted Critical
Publication of EP0074288B1 publication Critical patent/EP0074288B1/de
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 limiting switch device comprising, on the one hand, two movable contacts each placed at the end of a contact carrier lever which oscillates around a pivot and which is subjected to the action of a return spring, the respective arms of these two levers being placed in the same plane of rotation and being arranged substantially parallel one opposite the other when the device is closed, so that repulsion forces appear when these arms are traversed by very high currents, separate these two levers in the opposite direction and comprising, on the other hand, mechanical means capable of maintaining the contacts separated from each other after the appearance of these currents.
  • Such limiting switch devices are advantageously used in association with circuit breakers to ensure the protection of the lines which supply current-consuming devices, in particular when short-circuits appear.
  • circuit breakers generally have a relatively complicated structure which is partly due to the complexity of the fastening members used to automatically keep the circuit breaker open, and partly due to that of manual resetting devices.
  • the invention therefore proposes to. providing a current limiting device whose general structure corresponds to a known arrangement which has given complete satisfaction, but in which particular measures will be taken to overcome the drawbacks of the known art, mentioned above; the invention aims in particular to provide a limiter device in which the two contacts will be kept apart and will be galvanically isolated from each other as soon as a very small spacing appears between them, thus allowing it to be placed in series with a device contactor.
  • this result is achieved thanks to the fact that a thin insulating screen placed between the arms of the contact-carrying levers and capable of moving in a plane substantially perpendicular to the plane of rotation common to these levers is, of a on the other hand, subjected to the action of at least one elastic member which tends to project it between the two contact pads and that, on the other hand, this screen is held in a position army, where this elastic member is comprised of at least one abutment surface belonging to at least one of the contact levers.
  • a limiting device presented, for example, in the form of a unipolar box 1 in FIG. 1 and constituted, for example, by the association of two half-boxes 3, 4 symmetrical with respect to the plane of the figure, comprises mainly a first interior volume 5 placed in a lower region 6 of the housing and a second interior volume 7 placed in an upper region 8 of the housing.
  • the lower region of the housing has an outer base surface preferably used for fixing the device 15 and two opposite lateral extensions 9, 10 which each receive a conductor 11 respectively 12 for the electrical connection of the device, which can be carried out, either by means of a connection pad 13 of this conductor represented on the right of the figure, or by means of connection devices making use of a screw 14 and a socket 14 'extending beyond the base .
  • the second lower volume 5 receives two contact levers 16 and 17 each having a first end 18 respectively 19, pivoted around a pivot 20 respectively 21. These two pivots have axes parallel and perpendicular to a median plane PP 'in which can swing the levers and are placed near the base 15.
  • This plane PP 'advantageously represents the joint plane of the two half-housings 3, 4, see FIG. 2.
  • Each first end 18, 19 of the lever is connected to a connection conductor by a metal braid, or equivalent deformable conductor 22 respectively 23, of which a first portion 24 respectively 25, circulates substantially parallel to the base.
  • the first ends 18, 19 are placed in the vicinity of the pivots so that the movements of the contact levers cause only a slight deformation of the second portions 26, 27 of these metal braids, which are themselves substantially perpendicular to the base 15 , and are connected to parts 11, 13.
  • Contact pads 28, 29 are placed at the second ends 30 respectively 31 of the arms of the levers which are opposite to those receiving the braids. These arms are arranged substantially parallel to each other and facing each other, perpendicular to the base 15.
  • Two contact pressure springs 38 respectively 39 extending substantially around a common axis XX ', parallel to the base 15 and placed in the median plane, bear, on the one hand, on a boss and, on the other hand, on a side wall 40 respectively 41 of the housing; These two walls are substantially parallel to the arms of the levers and are substantially parallel to a plane RR 'of the housing which is perpendicular to the base and which symmetrically separates the two pivots and the two levers.
  • the spring 39 is optionally supported on the adjoining wall 41. by virtue of an adjustment piece 42.
  • An arc chamber 43 placed in the second interior volume 7 , comprises a multiplicity of forked fins 44, preferably arranged radially towards the contacts, so as to receive and split an arc appearing between the ends of the levers during of a cut.
  • These fins can be maintained either by shaped surfaces coming from molding with the insulating half-housings 3, 4, or be arranged inside a separate arc box placed inside the first volume'7.
  • the springs 38, 39 can also be either guided in half-housings 46, 47 half-housings, or be placed in guide bushings 46 ', 47' pinched between the half-housings and having these housings.
  • two magnetic parts 50 respectively 51 are arranged, each taking the shape of a U, the branches 52, 53 respectively 54, 55 of which surround at least partially the arms of the levers, see Figures 1, 2 and 3; These magnetic parts are held in relief or hollow shapes carried by the half-housings.
  • the contact pads 28., 29 each have a transverse edge 56 respectively 57, placed on the side of the corresponding pivot, these two edges being substantially oriented in the extension of one another, see FIG. 4.
  • a screen 32 is arranged which takes the form of a thin rectangular plate "e” made of insulating material, see also Figures 2 and 3.
  • This screen whose own plane is placed in the RR 'plane, can move in this plane either thanks to two opposite and parallel lateral edges 58, 59 which are guided in two opposite guide grooves 60, 61 forming baffles which separate the two levers 16, 17 and carried respectively by an internal surface of each half housing, see Figure 3, or in an appropriate guide interval, see Figure 6 described later.
  • An upper edge 33 of this screen is placed against at least one, and possibly the two transverse edges 56, 57 of the contact pads constituting movable stops, and is held in this position by means of two armed compression springs 63, 64 of parallel axes which are applied, on the one hand, to a bottom 65 of the housing carrying the base 15 and, on the other hand, to two support points 66, 67 of the screen, opposite the upper edge 33 and neighbors of the lateral guide edges 58, 59.
  • the two guide grooves extend sufficiently towards the arc chamber, so that the insulating screen can move under the effect of the springs and reach a position further from the bottom where the upper edge reaches point A, see figure. 1.
  • this circuit breaker results from the fact that when repulsion forces, which are applied to the arms of the levers and whose efficiency is improved by the magnetizable parts, separate the levers by an amount slightly greater than the thickness "e ", the insulating screen 32 escapes the rim 56, 57 and is very quickly propelled between the contact pads.
  • the passage of this screen produces not only a stretching of the arc, which arises between the pellets, towards the fins, but also the interposition of an obstacle which prevents the pellets from coming into contact immediately after their separation, and which then operates a partial isolation of two symmetrical half-chambers 43 ′, 43 "which together form the entire chamber 43.
  • two fins 68, 69, longer than the others, can be placed on either side of point A, and in the immediate vicinity of this point.
  • the screen may include an extension 70 directed towards the bottom or base of the housing, or have a lower edge sufficiently distant from '33 to avoid striking an arc between the lower ends of the levers, this extension being placed for example opposite the transverse rib 72 to form a baffle.
  • the two springs must therefore have, different characteristics so that this support on 45 is carried out in all cases;
  • the spring 38 exerts on the lever 16 when the latter is at rest, a force directed from left to right, which is greater than the force which is exerted by the spring 39 in the opposite direction on the lever 17 when contact 29 is pressed on contact 28.
  • the rearming of the device which aims to move the screen from the position corresponding to that where the upper edge 33 is in A to the position shown in Figure 1, is performed using a flat pusher 78 of thin, see Figure 5.
  • This pusher which is placed like the screen 32 in the plane RR 'slides downward thanks to two grooves 79, 80 belonging to the housing which guides its parallel edges 81, 82 when its upper end 83 passing through an opening 84 'of the roof 84 is subjected to an appropriate maneuver.
  • This pusher which is maintained in the high position visible in FIG.
  • the lower region 78 'of this pusher has a notch 78 "which also allows it not to prevent the contacts from being closed when the pusher is in the low position indicated in dotted lines in FIG. 5.
  • the housing of the unipolar device can advantageously be presented in an elementary form containing only the elements necessary for cutting a phase conductor, so that several elementary housings can be associated side by side when it is necessary to carry out the protection of a polyphase line, see Figure 3, for example using coupling rods 93, passing through the various housings 94, 95, 96.
  • the screen was advantageously pressed on them so that its release is immediate.
  • the guide grooves 60, 61 of the screen, the rib 72 and the abutment surface 45 of the contact lever 16 can advantageously be carried by an insulating molded part represented at 100 in FIG. 6 and placed in the first interior volume. 5 between the half-housings at the time of assembly.
  • This part 100 here comprises a single groove or guide interval 101 for the screen 32, which is placed in the plane R R 'and which leads to two parallel cylindrical housings 102, 103, intended to receive the springs 63, 64; this groove 101 is limited by walls 104, 105, substantially parallel to the plane RR ', one of which carries the abutment surface 106 corresponding to 45 and which are all those connected to two external walls 107, 108 parallel to the median plane PP '.
  • These walls which locally isolate the contact levers 16, 17 and the metal branches of the magnetic parts 50 and 51 comprise two pairs of open external housings 109, 110 and respectively 111, 112 to receive these branches and cooperate in the mechanical holding of the magnetic parts. ; two neighboring housings 110, 112, arranged on the same wall as 108, are separated by a partition such as 113 to avoid an untimely arcing between two magnetic pieces.
  • the levers 16, 17 move in two notches 114, 115 which are placed between the walls 107, 108 and which end at the walls 104, 105.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Air Bags (AREA)
  • Transmitters (AREA)
EP82401380A 1981-08-07 1982-07-26 Automatische Begrenzungsvorrichtung für Kurzschlussströme Expired EP0074288B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401380T ATE13106T1 (de) 1981-08-07 1982-07-26 Automatische begrenzungsvorrichtung fuer kurzschlussstroeme.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115573 1981-08-07
FR8115573A FR2511185A1 (fr) 1981-08-07 1981-08-07 Dispositif automatique de limitation de courants de court-circuit

Publications (2)

Publication Number Publication Date
EP0074288A1 true EP0074288A1 (de) 1983-03-16
EP0074288B1 EP0074288B1 (de) 1985-05-02

Family

ID=9261399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401380A Expired EP0074288B1 (de) 1981-08-07 1982-07-26 Automatische Begrenzungsvorrichtung für Kurzschlussströme

Country Status (9)

Country Link
US (1) US4467298A (de)
EP (1) EP0074288B1 (de)
JP (1) JPS5838434A (de)
AT (1) ATE13106T1 (de)
BR (1) BR8204620A (de)
CA (1) CA1189554A (de)
DE (1) DE3263401D1 (de)
FR (1) FR2511185A1 (de)
IE (1) IE53908B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6860181B2 (en) 2000-08-03 2005-03-01 Trend Windows & Doors Pty Limited Automated manufacturing apparatus for aluminium window/door systems

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540666B1 (fr) * 1983-02-04 1986-10-10 Telemecanique Electrique Interrupteur limiteur
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
FR2573571B1 (fr) * 1984-11-16 1987-01-09 Telemecanique Electrique Appareil disjoncteur a ouverture et fermeture telecommandees de ses circuits
FR2575589B1 (fr) * 1984-12-28 1987-02-06 Telemecanique Electrique Interrupteur electrique a ecran
FR2581788B1 (fr) * 1985-05-10 1989-05-05 Telemecanique Electrique Interrupteur electrique a ecran
US4752660A (en) * 1986-01-10 1988-06-21 Matsushita Electric Works, Ltd. Current limiting circuit breaker with an arc shearing plate
JPH01231238A (ja) * 1987-11-09 1989-09-14 Fuji Electric Co Ltd 回路遮断器の接触子装置
SI9111607A (en) * 1991-09-30 1997-10-31 Elektroelement Izlake D D Contact-arc system of an installation contactor
DE19735521A1 (de) * 1997-08-16 1999-02-18 Kloeckner Moeller Gmbh Lichtbogenlöscheinrichtung für einen kurzschlußstrombegrenzenden Niederspannungsschalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477837A (en) * 1944-08-25 1949-08-02 Westinghouse Electric Corp Circuit interrupter
DE1010618B (de) * 1952-01-21 1957-06-19 Rudolf Bogenschuetz Ges Mit Be Lichtbogenkammer fuer elektrische Selbstschalter
FR1238660A (fr) * 1958-10-16 1960-08-12 Siemens Ag Dispositif pour allonger les arcs électriques
US3068379A (en) * 1957-04-11 1962-12-11 Fed Pacific Electric Co Circuit protective apparatus
DE1141012B (de) * 1958-10-28 1962-12-13 Licentia Gmbh Schutzeinrichtung in Stromversorgungs- und Verteilungsanlagen
US4031492A (en) * 1975-08-22 1977-06-21 Westinghouse Electric Corporation Triple break current limiter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147358A (en) * 1960-03-31 1964-09-01 Leonard J Melhart Magnetic blowout contact switch
DE1590296B1 (de) * 1966-04-21 1971-01-28 Driescher Spezialfab Fritz Loeschkammerschalter mit nach aussen offener Loeschkammer
US3815059A (en) * 1972-12-01 1974-06-04 Westinghouse Electric Corp Circuit interrupter comprising electromagnetic opening means
US4346357A (en) * 1979-12-17 1982-08-24 Gould Inc. Current-limiting circuit breaker adapter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477837A (en) * 1944-08-25 1949-08-02 Westinghouse Electric Corp Circuit interrupter
DE1010618B (de) * 1952-01-21 1957-06-19 Rudolf Bogenschuetz Ges Mit Be Lichtbogenkammer fuer elektrische Selbstschalter
US3068379A (en) * 1957-04-11 1962-12-11 Fed Pacific Electric Co Circuit protective apparatus
FR1238660A (fr) * 1958-10-16 1960-08-12 Siemens Ag Dispositif pour allonger les arcs électriques
DE1141012B (de) * 1958-10-28 1962-12-13 Licentia Gmbh Schutzeinrichtung in Stromversorgungs- und Verteilungsanlagen
US4031492A (en) * 1975-08-22 1977-06-21 Westinghouse Electric Corporation Triple break current limiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6860181B2 (en) 2000-08-03 2005-03-01 Trend Windows & Doors Pty Limited Automated manufacturing apparatus for aluminium window/door systems

Also Published As

Publication number Publication date
CA1189554A (fr) 1985-06-25
US4467298A (en) 1984-08-21
JPH0219572B2 (de) 1990-05-02
FR2511185B1 (de) 1984-09-21
FR2511185A1 (fr) 1983-02-11
ATE13106T1 (de) 1985-05-15
BR8204620A (pt) 1983-07-26
EP0074288B1 (de) 1985-05-02
IE821920L (en) 1983-02-07
DE3263401D1 (en) 1985-06-05
JPS5838434A (ja) 1983-03-05
IE53908B1 (en) 1989-04-12

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