EP0079817B1 - Kniehebelmechanismus mit Freiauslösung für Differentialschutzschalter und dergleichen und Differentialschutzschalter mit derartigem Mechanismus - Google Patents

Kniehebelmechanismus mit Freiauslösung für Differentialschutzschalter und dergleichen und Differentialschutzschalter mit derartigem Mechanismus Download PDF

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Publication number
EP0079817B1
EP0079817B1 EP19820402015 EP82402015A EP0079817B1 EP 0079817 B1 EP0079817 B1 EP 0079817B1 EP 19820402015 EP19820402015 EP 19820402015 EP 82402015 A EP82402015 A EP 82402015A EP 0079817 B1 EP0079817 B1 EP 0079817B1
Authority
EP
European Patent Office
Prior art keywords
toggle
differential
differential circuit
circuit breakers
movable
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
EP19820402015
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English (en)
French (fr)
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EP0079817A1 (de
Inventor
Jean-Marie Roiatti
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.)
Hager Electro SAS
Original Assignee
Hager Electro SAS
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 Hager Electro SAS filed Critical Hager Electro SAS
Publication of EP0079817A1 publication Critical patent/EP0079817A1/de
Application granted granted Critical
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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
    • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
    • H01H71/64—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement incorporating toggle linkage

Definitions

  • the invention relates to free tripping mechanisms, of the toggle type, for earth leakage circuit breakers and the like.
  • free tripping mechanism is meant generally a mechanism designed so that the differential device of the circuit breaker, that is to say a device causing the opening of the circuit breaker when a differential current exceeds a predetermined value, can trip even if the operating member of the mechanism is maintained in the closed position or in any other intermediate position posterior to that where the movable contacts of the circuit breaker begin to touch its fixed contacts.
  • the expression “free trigger mechanism of the toggle type” is understood to mean more particularly a free trigger mechanism which comprises a transmission toggle link between the operating member, rotary or sliding, and a member actuating the movable contacts.
  • a differential circuit breaker is generally equipped with a test button making it possible to create a differential current at will, which makes it possible to verify that the differential circuit breaker is in good working order.
  • the object of the invention is to create a free trigger mechanism, of the toggle type, which has two clearly separated members to allow on the one hand to carry out the tests and on the other hand to condemn it momentarily.
  • Another object of the invention is to arrange a free tripping mechanism in such a way that, by a simple operation, it makes it possible to carry out a preclosure, that is to say an operation such that the circuit breaker remains closed, but is automatically condemned as soon as the mechanism has triggered the appearance of a real differential current or artificially created by the test button.
  • the invention relates to a free tripping mechanism, for earth leakage circuit breakers and the like, which comprises, on the one hand, a transmission toggle switch between a movable operating member and an actuating drive member, against the action of return means, at least one movable contact which cooperates with at least one fixed contact, and on the other hand an electromagnetic system sensitive to a differential or other current and capable, during the appearance of such a current in closed position, to relax the toggle joint, which causes the separation of the contacts under the action of the aforesaid return means, this electromagnetic system being equipped with a test button, characterized in that it comprises a movable locking member , independently of the test button, between a rest position, for which it is located away from the trajectory followed by the armed or taut kneepad, and a work position for which it not only relaxes the toggle in the open position of the circuit breaker but still it is placed on the path followed by the relaxed toggle in the event of tripping, while maintaining this relaxed toggle.
  • the invention also relates to a differential circuit breaker or the like, characterized in that it is equipped with such a mechanism with free tripping.
  • Fig. 1 schematically shows a free trigger mechanism which includes the improvements of the invention.
  • FIG. 2 to 5 schematically represent the essential mechanical elements of the mechanism of FIG. 1, in as many different operating positions, the position of FIG. 4 being identical to that of FIG. 1.
  • Fig. 6 schematically represents the essential mechanical elements of a free trigger mechanism established in accordance with a variant.
  • Fig. 1 schematically represents a free trigger mechanism with toggle joint, of known construction, apart from the improvements of the invention which will be defined below.
  • Such a mechanism comprises a transmission toggle 1 between an operating member 2 and a drive member 3 actuating, against the action of return means 4, at least one movable contact 5 which cooperates with at least one fixed contact 6.
  • the operating member 2 is a rotary member comprising an axis 7 on which are fixed a button or control lever (not shown) and an arm 8; a return spring 9 tends to rotate the operating member anticlockwise.
  • the toggle 1 is made of a primary lever 11 and of a secondary lever 12 connected together by an axis 10. When the toggle 1 is tensioned, abutment means 13, of any known type, prevent the two levers 11, 12 to exceed the angular position shown in fig.
  • the lever primary 11 is connected by an axis 14 to the operating arm 8 and is subjected to the action of a resetting spring 15.
  • the drive member 3 is constituted by a rotary arm 16, mounted on an axis 17 in the direction opposite arm 8, so that arms 8 and 16 can form a Z with the knee lifter 1 stretched (fig. 2).
  • a return spring 18 tends to rotate the arm 16 in the direction of Clockwise.
  • the secondary lever 12 is connected by an axis 19 to the arm 16.
  • the latter acts, by means of a pusher 40, on an articulated contact carrier 41 of which one of the ends carries the movable contact 5 and of which the the other end is urged by a compression spring which partly constitutes the above-mentioned return means 4 and ensures the pressure of the movable contact 5 on the fixed contact 6.
  • the known circuit breaker also comprises an electromagnetic system 20, sensitive to a differential current and capable, when a differential current appears, of rotating a cam 21 so that it lets out an arm 22 of a lever 23 , mounted on an axis 24 and biased by a spring 25 clockwise.
  • This lever 23 comprises a second arm 26 (shown only in part) which, when the lever 23 is released by the cam 21, comes to relax the toggle joint 1, that is to say to rotate the levers 11 and 12 around their axis 10 in the direction which tends to pass the mechanism from the position of FIG. 1 to that of FIG. 5.
  • the toggle 1 is presented as a rigid connecting rod and rotates the arm 16 anticlockwise until the movable contact 5 comes to bear against the fixed contact 6, as shown in figs. 1 and 4. If one starts from the above-mentioned open position shown in FIG. 2 and that the operating member 2 is also made to rotate clockwise but in the presence of a differential current in the electromagnetic system 20, the latter relaxes the toggle joint 1 (FIG. 3 and 5) by means of the lever 23, so that the movable contact 5 is spaced from the fixed contact 6.
  • the circuit breaker of known construction also comprises a test button (not shown) making it possible to create a differential current in the electromagnetic system 20 at will.
  • the invention aims to adapt a locking system to the free trigger mechanism which has just been described.
  • the free trigger mechanism comprises a locking member 27, movable independently of the test button, between a rest position (fig. 2), for which it is located away from the path followed by the toggle armed or tense, and a working position (fig. 1, 3 to 5) for which he not only relaxes the toggle switch 1 in the open position of the circuit breaker (fig. 3) but also places himself on the path followed by the knee switch 1 relaxed in the event of release, keeping this knee switch relaxed as in fig. 3.
  • the locking member 27 is advantageously constituted by a rotary pawl, mounted on an axis 28 and displaceable using for example a screwdriver or a key.
  • Fig. 6 shows a variant in which the secondary lever 12 acts directly on the pusher 40, and not by means of a rotary multiplier arm 16.
  • the secondary lever 12 is connected to the pusher 40 by an axis 39, which is maintained on a straight path by a guide 30.
  • the stop means 13, instead of being carried by the lever 12 and cooperating with the end of the lever 11, have the opposite arrangement. It goes without saying that these abutment means could also be arranged at the level of the axis 10 of the toggle joint 1.
  • the operating member 2 instead of being mobile in rotation, it could just as easily be mobile in translation by acting on the axis 14, in the absence of the arm 8.

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  • Breakers (AREA)

Claims (4)

1. Ausschaltmechanik für Sicherungsautomaten mit Auslösung durch Differenzstrom oder ähnliches, die einerseits umfasst ein Kniegelenk (1) zur Übertragung zwischen einem beweglichen Betätigungsorgan (2) und einem Mitnahmeorgan (3,40), betätigend gegen die Wirkung von Rückholmitteln (4) wenigstens einen beweglichen Kontakt (5), der mit wenigstens einem festen Kontakt (6) zusammenwirkt; und anderseits ein Elektromagnetsystem (20), welches auf einen Differenzstrom oder anderen Strom anspricht und fähig ist, beim Auftreten eines solchen Stromes in Schliessstellung das Kniegelenk (1 ) durchknicken zu lassen, das die Trennung der Kontakte (5, 6) unter der Wirkung der besagten Rückholmittel (4) verursacht; dieses Elektromagnetsystem (20) ist mit einem Prüfdruckknopf ausgerüstet, dadurch gekennzeichnet, dass es ein bewegliches Stromunterbrechungsorgan (27) umfasst, unabhängig vom Prüfdruckknopf, zwischen einer Ruhestellung, in welcher es abseits von der Bewegungsbahn des Kniehebels (1), gespannt oder gestreckt, liegt und einer Arbeitsstellung, in welcher nicht nur der Kniehebel (1) in der geöffneten Stellung des Sicherungsautomaten geknickt wird, sondern es sich noch in die Bewegungsbahn des geknickten Kniehebels (1 ) setzt im Auslösefall, indem dieser Kniehebel geknickt gehalten wird.
2. Mechanik gemäss Anspruch 1, dadurch gekennzeichnet, dass das Stromunterbrechungsorgan (27) aus einer Drehklinke besteht, die mit einem vom Kniehebel (1) getragenen Vorsprung (29) zusammenarbeitet.
3. Mechanik gemäss Anspruch 1, dadurch gekennzeichnet, dass das Stromunterbrechungsorgan (27) ein Gleitstück ist, das mit einem vom Kniehebel (1 ) getragenen Vorsprung (29) zusammenarbeitet.
4. Sicherungsautomat mit Differenzstromauslösung oder ähnlich, dadurch gekennzeichnet, dass er mit einer Auslösemechanik ausgerüstet ist, die einem der Ansprüche 1 bis 3 entspricht.
EP19820402015 1981-11-13 1982-11-02 Kniehebelmechanismus mit Freiauslösung für Differentialschutzschalter und dergleichen und Differentialschutzschalter mit derartigem Mechanismus Expired EP0079817B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8121269A FR2516700A1 (fr) 1981-11-13 1981-11-13 Perfectionnements aux mecanismes a declenchement libre, du type a genouillere, pour disjoncteurs differentiels et analogues et disjoncteurs differentiels comportant un tel mecanisme
FR8121269 1981-11-13

Publications (2)

Publication Number Publication Date
EP0079817A1 EP0079817A1 (de) 1983-05-25
EP0079817B1 true EP0079817B1 (de) 1985-08-14

Family

ID=9263970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820402015 Expired EP0079817B1 (de) 1981-11-13 1982-11-02 Kniehebelmechanismus mit Freiauslösung für Differentialschutzschalter und dergleichen und Differentialschutzschalter mit derartigem Mechanismus

Country Status (4)

Country Link
EP (1) EP0079817B1 (de)
DE (1) DE3265450D1 (de)
ES (1) ES8308147A1 (de)
FR (1) FR2516700A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065859A (en) * 1931-11-04 1936-12-29 Railway & Industrial Eng Co Safety interlock for electrical and mechanical equipment and systems
US3657672A (en) * 1970-09-24 1972-04-18 Westinghouse Electric Corp Circuit breaker with manual trip structure
DE2507497C3 (de) * 1975-02-21 1978-05-18 Brown, Boveri & Cie Ag, 6800 Mannheim Fehlerstromschutzschalter mit Schaltwerk und Prüftaste

Also Published As

Publication number Publication date
DE3265450D1 (en) 1985-09-19
FR2516700A1 (fr) 1983-05-20
EP0079817A1 (de) 1983-05-25
FR2516700B1 (de) 1984-06-01
ES517219A0 (es) 1983-08-01
ES8308147A1 (es) 1983-08-01

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