EP0156692B1 - Mécanisme de fermeture brusque d'un disjoncteur miniature - Google Patents

Mécanisme de fermeture brusque d'un disjoncteur miniature Download PDF

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Publication number
EP0156692B1
EP0156692B1 EP85400357A EP85400357A EP0156692B1 EP 0156692 B1 EP0156692 B1 EP 0156692B1 EP 85400357 A EP85400357 A EP 85400357A EP 85400357 A EP85400357 A EP 85400357A EP 0156692 B1 EP0156692 B1 EP 0156692B1
Authority
EP
European Patent Office
Prior art keywords
handle
overrun
protuberance
closing
contact
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
EP85400357A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0156692A1 (fr
Inventor
Louis Boillot
Michel Lazareth
Jean-Claude Ramacciotti
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT85400357T priority Critical patent/ATE42865T1/de
Publication of EP0156692A1 publication Critical patent/EP0156692A1/fr
Application granted granted Critical
Publication of EP0156692B1 publication Critical patent/EP0156692B1/fr
Expired legal-status Critical Current

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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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms

Definitions

  • the invention relates to an abrupt manual closing mechanism of a power cut device, in particular of a switch or circuit breaker, with lever connected by a kinematic chain to a contact carrier arm.
  • Miniature circuit breakers particularly of modular electrical distribution systems, include a manual control lever for opening and closing.
  • the closing maneuver causes the arming of a spring ensuring the abrupt opening of the contacts in the event of a fault and assisting the lever in the opening maneuver.
  • the contact pressure may be insufficient for a good current flow and the heating of the contacts may cause welding or erosion.
  • US-A 3,239,621 it has already been proposed to insert into the transmission mechanism between the lever and the contact-carrying arm an energy accumulator spring which comes into action at the end of the closing stroke. to cause the abrupt closure of the contacts.
  • This known device is complicated and requires a special mechanism which cannot be adapted or added to standard circuit breakers.
  • the document DE-A 2534827 describes an elastic piece slowing down the movement of the lever at the end of the contact closure stroke and accumulating a return energy of the lever in the open position. The braking force increases until the contacts are closed and thereafter abruptly decreases, but this reduction does not cause an abrupt closure.
  • the present invention aims to allow the realization of an operating mechanism of a miniature circuit breaker extremely simple and capable of causing a sudden closure of the contacts and this object is achieved by the implementation of the features set out in claim 1.
  • the presence of a hard point on the closing stroke of the handle obliges the operator to apply to the handle an increased actuating force sufficient to pass this hard point.
  • This actuating force becomes fully available as soon as the retaining stop is erased when the hard point is passed, and it is sufficient to cause the sudden displacement of the contacts towards the closed position.
  • the hard point corresponds to a position of the contacts close to that of the closure, and it is practically impossible for an operator to move the lever beyond the hard point and to maintain it in an intermediate position between this hard point and the position of closing.
  • the erasable stop is advantageously provided by an elastic piece deforming under the action of the lever and automatically erasing after a predetermined deformation.
  • the elastic bandaged piece does not restore energy to the mechanism to ensure the abrupt closing, the latter being carried out by the action of the operator on the lever. It is easy to see that the erasable stop or the elastic piece can be added without significant modification to standard mechanisms to transform a circuit breaker and ensure the abrupt closing of the contacts.
  • the erasable stop is inactive in the direction of pivoting of the lever corresponding to a contact opening so as not to hamper this pivoting of the lever, either under manual action or under the effect of a spring return during '' tripping of the circuit breaker.
  • the elastic piece is advantageously constituted by an elastic blade capable of pivoting freely in the direction corresponding to an opening of the contacts, while it comes to brace on a projection of the housing during a pivoting of the lever in the direction reverse contact closure.
  • the elastic blade is held by a return spring in support of the projection of the housing.
  • Figures 1 and 2 are views of a mechanism described in detail in French Patent No. 2,344,950 which will advantageously be referred to for further details. It suffices to recall that the pivoting lever 10 is mounted for rotation on an axis 12, the body 14 of the lever carrying a crank pin 16 attacking a toggle joint 20 with links 18, 22.
  • the link 22 belongs to a plate 24 pivotally mounted on an axis 26 and having an extension 28 carrying an axis 30 of articulation of a contact-carrying arm 32.
  • One of the ends 34 of the arm 32 carries the movable contact 38 cooperating with a fixed contact 40, while the end opposite cooperates with an attachment 36 of a trigger lever 44 rotatably mounted on a pivot 46.
  • a contact pressure spring 42 urges the movable contact 38 in the closed position.
  • a lock 48 controlled by a magnetic or thermal trip unit 50 (not shown), cooperates with the lever 44 to cause tripping of the circuit breaker in the event of a fault.
  • a spring 52 biases the contact-carrying arm in the contact opening position.
  • the body 14 of the lever 10 has a protuberance or a boss 54 moving along a circular path during a pivoting of the lever 10 and meeting during its movement the end of an articulated blade 56 on a fixed pivot 58 integral with the housing 60.
  • a spiral spring 62 biases the blade 56 in abutment with a stop 64 integral with the housing 60 which limits the pivoting of the blade 56 in the trigonometric direction in FIG. 1. Pivoting in the opposite direction takes place freely, defeating the force of the return spring 62.
  • the blade 56 is elastic to allow deformation under the action of the protuberance 54, deformation causing on the one hand an accumulation of energy , and secondly, an erasure of the end of the elastic blade 56 from the path of movement of the protuberance 54 which, after crossing the blade 56, moves freely.
  • the elastic blade 56 In the open position of the circuit breaker, shown in Figure 1, the elastic blade 56 is held by the spring 62 in abutment of the stop 64, the protrusion 54 being remote from the blade 56.
  • the protuberance 54 meets the end of the elastic blade 56 and causes the latter to bend, kept in abutment with the stop 64 (fig. 3).
  • the deformation of the elastic blade 56 requires increased actuation torque of the handle 10, shown in FIG. 6 as a function of the pivot angle of the lever 10.
  • Position a corresponds to the engagement of the protuberance 54 against the blade 56, position a 2 corresponding to the crossing of the blade 56 by the protuberance 54 (fig. . 4).
  • the protuberance 54 abuts against the end of the elastic blade 56 by rotating it clockwise against the return spring 62 (fig. 5).
  • the opposing force is practically negligible and it is possible to admit that the blade 56 has no influence on the opening operation of the circuit breaker.
  • the invention is in no way limited to the mode of implementation more particularly described, the elastic blade 56 being able to cooperate very well with another element of the mechanism, in particular of the contact arm 32 or of the toggle joint system, that the opposing force can be generated by any other elastic or energy accumulation system, and that the movement of the lever can be rectilinear.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Scissors And Nippers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP85400357A 1984-03-02 1985-02-26 Mécanisme de fermeture brusque d'un disjoncteur miniature Expired EP0156692B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400357T ATE42865T1 (de) 1984-03-02 1985-02-26 Schnelleinschaltvorrichtung fuer miniature schuetzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8403417A FR2560713B1 (fr) 1984-03-02 1984-03-02 Mecanisme de fermeture brusque d'un disjoncteur miniature
FR8403417 1984-03-02

Publications (2)

Publication Number Publication Date
EP0156692A1 EP0156692A1 (fr) 1985-10-02
EP0156692B1 true EP0156692B1 (fr) 1989-05-03

Family

ID=9301725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400357A Expired EP0156692B1 (fr) 1984-03-02 1985-02-26 Mécanisme de fermeture brusque d'un disjoncteur miniature

Country Status (9)

Country Link
EP (1) EP0156692B1 (es)
JP (1) JPS617532A (es)
AT (1) ATE42865T1 (es)
AU (1) AU577833B2 (es)
CA (1) CA1253552A (es)
DE (1) DE3570010D1 (es)
ES (1) ES8606731A1 (es)
FR (1) FR2560713B1 (es)
ZA (1) ZA851522B (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739291A (en) * 1986-12-08 1988-04-19 Lee Wen Fong Magnetic vacuum circuit breaker
DE4339425B4 (de) * 1993-11-18 2005-11-10 Heinrich Kopp Ag Schaltschloß für einen Fehlerstromschutzschalter
JP4186407B2 (ja) * 2000-10-10 2008-11-26 富士電機機器制御株式会社 回路しゃ断器のハンドル操作機構
FR2827076B1 (fr) * 2001-07-06 2004-03-12 Schneider Electric Ind Sa Disjoncteur et son mecanisme de commande
CN207425751U (zh) * 2017-06-08 2018-05-29 李文杰 一种高分断小型断路器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1388664A (fr) * 1963-06-27 1965-02-12 Comp Generale Electricite Dispositif à fermeture indépendante pour appareils électriques
GB1087135A (en) * 1963-07-24 1967-10-11 Plessey Uk Ltd Improvements in or relating to electric snap-action switch devices
DE2534827C3 (de) * 1975-08-05 1978-04-20 Ellenberger & Poensgen Gmbh, 8503 Altdorf Doppelarmiger Kipphebel insbesondere für ein Schaltschloß
FR2344950A1 (fr) * 1976-03-15 1977-10-14 Merlin Gerin Mecanisme de commande d'un disjoncteur

Also Published As

Publication number Publication date
FR2560713A1 (fr) 1985-09-06
DE3570010D1 (en) 1989-06-08
ES540721A0 (es) 1986-04-16
JPS617532A (ja) 1986-01-14
FR2560713B1 (fr) 1988-04-29
AU3943285A (en) 1985-09-05
ZA851522B (en) 1985-10-30
ES8606731A1 (es) 1986-04-16
AU577833B2 (en) 1988-10-06
CA1253552A (en) 1989-05-02
EP0156692A1 (fr) 1985-10-02
ATE42865T1 (de) 1989-05-15

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