EP0074288B1 - Dispositif automatique de limitation de courants de court-circuit - Google Patents

Dispositif automatique de limitation de courants de court-circuit Download PDF

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Publication number
EP0074288B1
EP0074288B1 EP82401380A EP82401380A EP0074288B1 EP 0074288 B1 EP0074288 B1 EP 0074288B1 EP 82401380 A EP82401380 A EP 82401380A EP 82401380 A EP82401380 A EP 82401380A EP 0074288 B1 EP0074288 B1 EP 0074288B1
Authority
EP
European Patent Office
Prior art keywords
levers
contact
screen
switch device
case
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
EP82401380A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0074288A1 (fr
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(B1) "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/fr
Application granted granted Critical
Publication of EP0074288B1 publication Critical patent/EP0074288B1/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 limiting switch device according to the preamble of claim 1.
  • Such limiting switch devices are advantageously used in combination 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, in part, due to the complexity of the fastening members used to automatically keep the circuit breaker open and, in part, due to that of manual resetting devices.
  • the invention therefore proposes to provide a current limiting device whose general structure corresponds to a known arrangement having given full 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.
  • a limiter switch device comprising two contact levers arranged symemquemem with respect to a yaw and moons around pivots parallel to this plane, these levers being each subjected to a spring so applying one against the other two contact pads which they carry at their respective ends, and an insulating plate movable in said plane and a portion of which is normally applied by elastic means against a region of the levers serving as a connecting rod which immobilizes said plate when the contact pads are applied against each other, while, when a short-circuit current in the levers separates the latter from each other, said portion driven by elastic means is inserted between the levers to prevent elastic reclosing of the contact pads.
  • the insulating plate moves parallel to the pivots and keeps the levers separate from each other, but it does not come between the contact pads and therefore does not serve as a screen keeping them galvanically isolated from one 'other.
  • the arc that arises between the contacts is not subject to elongation, and its re-ignition between the levers or its path to a region close to the pivots is always to be feared.
  • 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.
  • that of the apparatus which can be carried out either by virtue of a connection pad 13 of this conductor shown on the right of the figure, or by means of connection members using 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 oscillate the levers and are placed - Machining of the base 15.
  • This plane PP represents ntagely the joint plane of the two half-days 3, 4 (see fig. 2).
  • Each first lever end 18, 19 is connected to a connection conductor by a metal braid, or equivalent deformable conductor 22 respectively 23, a first portion 24 respectively 25 of which 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.
  • edges 34, 35 of these ends which are opposite to the contact pads each have a boss 36 respectively 37.
  • the spring 39 is optionally supported on the neighboring wall 41 by means 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 either be maintained 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 either be guided in half-housings 46, 47 of the half-housings, or be placed in guide sleeves 46 ', 47' pinched between the half-housings and having these housings.
  • two magnetic pieces 50 and 51 are respectively arranged, each taking the form.
  • a U whose branches 52, 53 respectively 54, 55 at least partially surround the arms of the levers (see fig. 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 of insulating material (see also fig. 2 and 3).
  • This screen the proper plane of which is placed in the plane RR ', can move in this plane either by virtue of 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 fig. 3), or in an appropriate guide interval (see fig. 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 fig 1).
  • this circuit breaker results from the fact that, when repulsion forces, which apply 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 entering. 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 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 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 the contact 29 is pressed on the contact 28.
  • the lever 17, which is the least loaded will therefore move away more quickly than the other.
  • Resetting the device which aims to move the screen from the position corresponding to that where the upper edge 33 is at A to the position shown in FIG. 1, is carried out using a flat pusher 78 of small thickness (see FIG. 5).
  • This pusher which is placed like the screen 32 in the plane RR ', slides downwards 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 held 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 closing again when the pusher is in the low position indicated in dotted lines in Fig. 5.
  • a path of evacuation and rolling of the gases which appear during an automatic cut-off comprises, for example (see fig.
  • 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 fig. 3), for example using coupling rods 93 passing through the various housings 94, 95, 96.
  • the screen has been advantageously pressed on them so that their 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 shown at 100 in FIG. 6 and being 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 RR '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 both 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 111, 112 respectively to receive these branches and cooperate in the mechanical maintenance 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)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (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 Dispositif automatique de limitation de courants de court-circuit Expired EP0074288B1 (fr)

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 EP0074288A1 (fr) 1983-03-16
EP0074288B1 true EP0074288B1 (fr) 1985-05-02

Family

ID=9261399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401380A Expired EP0074288B1 (fr) 1981-08-07 1982-07-26 Dispositif automatique de limitation de courants de court-circuit

Country Status (9)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2540666B1 (fr) * 1983-02-04 1986-10-10 Telemecanique Electrique Interrupteur limiteur
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
EP0236576B1 (en) * 1986-01-10 1991-08-14 Matsushita Electric Works, Ltd. Circuit breaker
JPH01231238A (ja) * 1987-11-09 1989-09-14 Fuji Electric Co Ltd 回路遮断器の接触子装置
YU160791A (sh) * 1991-09-30 1994-06-24 Elektroelement Izlake D.D. Kontaktno-lučni sistem instalacionog rastavljača
DE19735521A1 (de) * 1997-08-16 1999-02-18 Kloeckner Moeller Gmbh Lichtbogenlöscheinrichtung für einen kurzschlußstrombegrenzenden Niederspannungsschalter
AUPQ916600A0 (en) 2000-08-03 2000-08-24 James Hardie Research Pty Limited Automated manufactured apparatus for aluminium window/door systems

Family Cites Families (10)

* 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
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
US4031492A (en) * 1975-08-22 1977-06-21 Westinghouse Electric Corporation Triple break current limiter
US4346357A (en) * 1979-12-17 1982-08-24 Gould Inc. Current-limiting circuit breaker adapter

Also Published As

Publication number Publication date
IE53908B1 (en) 1989-04-12
FR2511185A1 (fr) 1983-02-11
DE3263401D1 (en) 1985-06-05
JPH0219572B2 (enrdf_load_stackoverflow) 1990-05-02
EP0074288A1 (fr) 1983-03-16
US4467298A (en) 1984-08-21
ATE13106T1 (de) 1985-05-15
BR8204620A (pt) 1983-07-26
IE821920L (en) 1983-02-07
CA1189554A (fr) 1985-06-25
FR2511185B1 (enrdf_load_stackoverflow) 1984-09-21
JPS5838434A (ja) 1983-03-05

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