EP0452230B1 - Antriebsmechanismus für Schutzschalter - Google Patents

Antriebsmechanismus für Schutzschalter Download PDF

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Publication number
EP0452230B1
EP0452230B1 EP91420108A EP91420108A EP0452230B1 EP 0452230 B1 EP0452230 B1 EP 0452230B1 EP 91420108 A EP91420108 A EP 91420108A EP 91420108 A EP91420108 A EP 91420108A EP 0452230 B1 EP0452230 B1 EP 0452230B1
Authority
EP
European Patent Office
Prior art keywords
indicator
arm
handle
lever
nose
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
EP91420108A
Other languages
English (en)
French (fr)
Other versions
EP0452230A1 (de
Inventor
Michel Lazareth
Noel Lecorre
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
Publication of EP0452230A1 publication Critical patent/EP0452230A1/de
Application granted granted Critical
Publication of EP0452230B1 publication Critical patent/EP0452230B1/de
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
    • 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
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a control mechanism for an electrical circuit breaker with an insulating housing containing a pair of fixed and movable contacts, said movable contact being carried by a contact arm actuated by the mechanism, which comprises a lever pivotally mounted on an axis. and movable in an orifice of the housing between two extreme positions F for closing and O for opening, a transmission link coupled to the lever to form a toggle joint, a breakable mechanical connection between the link and a support lever for the contact arm, a trip lever for locking and unlocking the mechanical connection, and a mechanical indicator of the state of the circuit breaker having an indicator light capable of occupying an active position visible from the outside in the position O of opening of the lever.
  • Such a mechanism is described in document EP-A-0 342133, comprising a device for indicating contact soldering, and for apparent signaling of the opening of the circuit breaker.
  • the indicator is fixed directly on the periphery of the joystick base, and moves continuously with the latter. The positioning of the indicator nevertheless depends on the test force exerted on the lever in the event of contact welding. Depending on the elasticity of the mechanism members, a forced actuation of the lever can make a portion of the indicator visible, causing risks of errors on the actual state of the circuit breaker contacts.
  • the object of the invention is to improve the reliability of a mechanical indicator of the state of a circuit breaker by making it insensitive to the test force exerted on the handle.
  • the mechanism according to the invention is characterized in that the indicator comprises a bistable lever mounted for free rotation on the axis of the lever, and cooperating with a nose of the lever support intended to lock the indicator and make it invisible in a stable inactive position, when the lever is actuated from the closed position F to the open position O in the event of soldering of the contacts.
  • the bistable arrangement of the indicator makes it possible to safely recognize the open or closed state of the contacts.
  • the indicator is only visible in the active position, corresponding to the opening position of the handle after separation of the contacts.
  • the indicator is invisible in the inactive position when the contacts are closed normally or by accidental welding.
  • the indicator is insensitive to the test force exerted on the lever, given its cooperation with the support arm of the contact arm.
  • the indicator lever includes a first signaling arm on which the indicator is arranged, and a second control arm cooperating with the nose, the two arms being angularly offset from each other by a predetermined angle, centered on the axis of the joystick.
  • the indicator is returned to the inactive position by means of the action of the lever on the first arm.
  • the mechanism is equipped with a mechanical device for locking the handle in an intermediate position S in the event of soldering of the contacts. This results in a fully visible cut-off function with contact position indicator.
  • the mechanism 10 is housed in the insulating case 12 of the circuit breaker, and is intended to actuate a movable contact arm 13 having a contact piece 14 cooperating with a fixed contact 16.
  • the mechanism 10 comprises a lever 18 pivotally coupled to a transmission link 20 to form a toggle switch 22, and a plate 24 mounted with limited rotation on a pivot 26 between a closed position and an open position of the contacts 14, 16.
  • On the pivot 26 is threaded a support lever 28 insulating the arm from this contact 13.
  • a mechanical connection 30 with a breakable connecting rod is formed by a second toggle joint having a hooking hook 32 pivotally mounted on an axis 34 of the plate 24 while being articulated to the connecting rod 20 of transmission.
  • a trigger lever 36 is mounted on an axis 38 of the plate 24 and cooperates with the retaining spout of the hook 32 to ensure the locking and unlocking of the mechanical link 30.
  • the lever 18 projects from an orifice 40 in the housing 12 and is pivotally mounted on an axis 42 between two extreme positions F and 0 corresponding respectively to the closing and opening of the contacts 14,16.
  • the mechanism 10 is provided with a mechanical indicator 50 formed by a bistable lever (fig. 1 to 4) mounted for free rotation on the axis 42 of the lever 18.
  • a return spring (not shown) requests the indicator 50 anticlockwise corresponding to the direction of opening of the lever 18.
  • the indicator 50 comprises a first signaling arm 52, the side face of which carries a colored light 54 and a second arm 54 ′ of control equipped with a step 55 capable of cooperating with a nose 56 of the support lever 28.
  • the first and second arms 52, 54 ′ are angularly offset from one another by an acute angle centered on the axis 42 of the lever 18.
  • the two opposite flanks of the second arm 54 ′ come into engagement with a pair of end-of-travel stops 58.60, integral with the housing 12 to delimit the angular travel of the indicator 50.
  • the indicator 50 is in a first stable inactive position, in which the indicator 54 of the first arm 52 remains invisible from the outside.
  • the contact arm 13 and its support lever 28 remain fixed, and the nose 56 blocks the step 55 of the second arm 54 ′ to maintain the indicator 50 in the first stable position, when the operator attempts to actuate the lever 18 towards the open position.
  • the indicator 54 remains invisible when the lever 18 is between the intermediate position S and the open position O.
  • the lever 18 In the event of non-welding of the contacts 14, 16 following a manual opening or an automatic triggering of the mechanism 10, the lever 18 is moved to the left position 0, and the nose 56 of the support lever 28 no longer interferes with the step 55 of the second arm 54 ′.
  • the absence of blocking of the nose 56 on the second arm 54 ′ and of the boss 62 of the lever 18 on the first arm 52 allows the pivoting of the indicator 50 in the anti-clockwise direction towards the second active position. stable (fig. 4) under the action of the return spring.
  • the second arm 54 ′ is in abutment against the second stop 60, and the appearance of the indicator 54 outside the orifice 40 signals the effective opening of the contacts 14, 16.
  • the reclosing of the circuit breaker is effected by displacement of the handle 18 from position 0 to position F.
  • the boss 62 of the handle 18 pushes the first arm 52 in the direction of the needles d 'a watch, and automatically returns the indicator 50 to the first stable position against the return force of the spring.
  • the indicator 54 can occupy two stable positions, one of which corresponding to the visible state indicates the separation of the contacts 14,16, and the other of which corresponding to the invisible state, signals the normal or welded closure of the contacts 14.16.
  • the display function is performed by a separate part of the handle 18. By its cooperation with the nose 56 of the support lever 28, the bistable indicator 50 is insensitive to the test force exerted on the handle 18. The indicator 50 will remain in the first inactive position if the lever 18 is forced to the open position O in the event of contact welding.
  • the variant of the indicator 150 illustrated in FIGS. 5 to 7 uses an additional drive spring 66 arranged between the nose 56 of the support lever 28 and the second arm 154.
  • the spring 66 is shaped as a twist pin positioned on a stud 68 of the housing 12. The ends of the spring 66 can move in oblong openings 70, 72 made respectively in the second arm 154, and the nose 56.
  • the step 55 is eliminated, and the rest of the mechanism is identical to that of FIGS. 1 to 4.
  • the operation of the indicator 150 in FIGS. 5 to 7 is similar to that described above, with the difference that the spring 66 plays the role of stroke amplifier, particularly recommended in a single-pole and neutral circuit breaker, in which the two arms of phase and neutral contact are slightly angularly offset.
  • the indicator 250 comprises a first signaling arm 252, the indicator 54 of which is shaped in a circular sector having a diameter close to that of the base 80 of the lever 18.
  • the diameter of the second control arm 254 with step 255 is greater than that of the first arm 252.
  • the indicator 54 remains invisible by being blocked in the first inactive position by the action of the nose 56 on the step 255, even when the lever 18 is forced towards the open position O .
  • the second arm 254 is in abutment against a stop 86 of the base 80.
  • the mechanism 10 is equipped with a device for locking the handle 18 in the event of welding of the contacts 14, 16.
  • the hooking hook 32 is equipped with a protrusion 144 coming into engagement against a stop integral with the housing 12 in the closed-welded state of the contacts 14, 16, to stop the lever 18 in a predetermined intermediate position S, located between the extreme positions F and O.
  • the passing of the dead center of the toggle switch 22 makes it stable said intermediate position S of the lever 18.
  • the indicator 54 remains invisible in this position.
  • the locking of the lever 18 in the position S is effected by the engagement of the protrusion 144 against the stop of the housing 12, which collects the force exerted on the lever 18 in the event of forced actuation.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Lock And Its Accessories (AREA)

Claims (9)

  1. Schaltmechanismus für einen Leistungsschalter mit Isolierstoffgehäuse (12), das ein Kontaktpaar aus einem feststehenden Kontakt (16) und einem beweglichen Kontakt (14) einschließt, wobei der bewegliche Kontakt (14) von einem durch den Mechanismus (10) betätigten Kontaktarm (13) getragen wird und der Mechanismus (10) einen drehbar auf einer Achse (42) gelagerten Schaltknebel (18), der in einer Aussparung des Gehäuses zwischen einer Einschaltendlage F und einer Ausschaltendlage O verschwenkt werden kann, einen mit dem Schaltknebel (18) zur Bildung eines Kniegelenks (22) gekuppelten Verbindungshebel (20), eine zwischen dem Verbindungshebel (20) und einem Traghebel (28) des Kontaktarms (13) angeordnete lösbare mechanische Verbindung (30), einen Auslösehebel (36) zur Verrieglung und Entriegelung der mechanischen Verbindung (30) sowie einen zur Wiedergabe des Schaltzustands des Leistungsschalters dienenden mechanischen Kontaktstellungsanzeiger (50, 150, 250) mit einem Anzeigefeld (54) umfaßt, das eine in der Ausschaltstellung O des Schaltknebels (18) von außen sichtbare aktive Stellung einnehmen kann, dadurch gekennzeichnet, daß der Kontaktstellungsanzeiger (50, 150, 250) einen auf einer Achse (42) des Schaltknebels (18) frei drehbar gelagerten bistabilen Hebel umfaßt, der mit einer Rückhaltenase (56) des Traghebels (28) zusammenwirkt, um das Anzeigefeld (54) zu blockieren und nicht sichtbar in einer stabilen inaktiven Stellung zu halten, wenn der Versuch unternommen wird, den Schaltknebel (18) bei versckweißten Kontakten (14, 16) von der Einschaltstellung F in die Ausschaltstellung O zu überführen.
  2. Schaltmechanismus nach Anspruch 1, dadurch gekennzeichnet, daß der Übergang des Kontaktstellungsanzeigers (50, 150, 250) von der aktiven in die inaktive Stellung nach Freigabe der Rückhaltenase (56) mit Hilfe einer Rückzugfeder (82) erfolgt, die gleichzeitig den Schaltknebel (18) in Richtung der Ausschaltstellung O beaufschlagt.
  3. Schaltmechanismus nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Hebel des Kontaktstellungsanzeigers (50, 150) einen ersten Anzeige-Hebelarm (52, 252), auf dem das Anzeigefeld (54) angeordnet ist, sowie einen zweiten Schalt-Hebelarm (54′, 154, 254) umfaßt, der mit der Rückhaltenase (56) zusammenwirkt, wobei die beiden Hebelarme (52, 252, 54′, 154, 254) in bezug auf die Achse (42) des Schaltknehels (18) um einen bestimmten Winkel zueinander versetzt angeordnet sind.
  4. Schaltmechanismus nach Anspruch 3, dadurch gekennzeichnet, daß
    der Schaltknebel (18) einen Vorsprung (62) aufweist, der dazu dient, den ersten Hebelarm (52) in Richtung der Einschaltstellung zu beaufschlagen, um den Kontaktstellungsanzeiger (50, 150, 250) in die inaktive Stellung zu überführen.
  5. Schaltmechanismus nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der zweite Schalt-Hebelarm (54′, 154, 254) zwischen zwei Endlagenanschlägen (58, 60, 62, 86) verschwenkt werden kann, die den Winkelhub des Kontaktstellungsanzeigers (50, 150, 250) begrenzen.
  6. Schaltmechanismus nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der zweite Hebelarm (54′, 254) des Kontaktstellungsanzeigers (50, 250) einen Absatz (55, 255) aufweist, der bei Verschweißen der Kontakte (14, 16) in Anschlag gegen die Rückhaltenase (56) gelangt.
  7. Schaltmechanismus nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß zwischen der Rückhaltenase (56) des Traghebels (28) und dem zweiten Hebelarm (154) des Kontaktstellungsanzeigers (150) eine zusätzliche Mitnehmerfeder (66) angeordnet ist, um den Winkelhub zu verstärken.
  8. Schaltmechanismus nach Anspruch 7, dadurch gekennzeichnet, daß die Feder (66) als Torsionsfeder ausgeführt und auf einen feststehenden Zapfen (68) aufgesteckt ist und ihre beiden Enden in jeweils im zweiten Hebelarm (154) bzw. in der Rückhaltenase (56) ausgebildeten Langlöchern (70, 72) gelagert sind.
  9. Schaltmechanismus nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Mechanismus (10) eine Vorrichtung aufweist, die den Schaltknebel (18) bei verschweißten Kontakten (14, 16) in einer Zwischenstellung S sicher blockiert, wobei die genannte Zwischenstellung S nach Überschreiten des Totpunkts des Kniegelenks (22) stabil ist.
EP91420108A 1990-04-09 1991-03-29 Antriebsmechanismus für Schutzschalter Expired - Lifetime EP0452230B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004642 1990-04-09
FR9004642A FR2660794B1 (fr) 1990-04-09 1990-04-09 Mecanisme de commande d'un disjoncteur electrique.

Publications (2)

Publication Number Publication Date
EP0452230A1 EP0452230A1 (de) 1991-10-16
EP0452230B1 true EP0452230B1 (de) 1994-12-07

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ID=9395658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420108A Expired - Lifetime EP0452230B1 (de) 1990-04-09 1991-03-29 Antriebsmechanismus für Schutzschalter

Country Status (5)

Country Link
EP (1) EP0452230B1 (de)
AT (1) ATE115329T1 (de)
DE (1) DE69105591T2 (de)
ES (1) ES2067899T3 (de)
FR (1) FR2660794B1 (de)

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DE60033632T2 (de) * 2000-04-07 2007-10-31 Hager Electro S.A. Sicherheitseinrichtung für elektrisches Gerät vom Schutzschalter Typ
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DE3515895C1 (de) * 1985-05-03 1986-07-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrischer Schalter,z.B. Motorschutzschalter
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FR2631485B1 (fr) * 1988-05-13 1995-06-02 Merlin Gerin Mecanisme de commande de disjoncteur miniature a indicateur de soudure des contacts

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Also Published As

Publication number Publication date
ES2067899T3 (es) 1995-04-01
FR2660794A1 (fr) 1991-10-11
FR2660794B1 (fr) 1996-07-26
DE69105591D1 (de) 1995-01-19
DE69105591T2 (de) 1995-06-08
EP0452230A1 (de) 1991-10-16
ATE115329T1 (de) 1994-12-15

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