EP0038288B1 - Entraînement mécanique pour la connexion et la coupure directes d'un interrupteur de protection à basse tension - Google Patents

Entraînement mécanique pour la connexion et la coupure directes d'un interrupteur de protection à basse tension Download PDF

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Publication number
EP0038288B1
EP0038288B1 EP19810730036 EP81730036A EP0038288B1 EP 0038288 B1 EP0038288 B1 EP 0038288B1 EP 19810730036 EP19810730036 EP 19810730036 EP 81730036 A EP81730036 A EP 81730036A EP 0038288 B1 EP0038288 B1 EP 0038288B1
Authority
EP
European Patent Office
Prior art keywords
low
protective switch
motor
switching
circuit breaker
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
EP19810730036
Other languages
German (de)
English (en)
Other versions
EP0038288A1 (fr
Inventor
Werner Troebel
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0038288A1 publication Critical patent/EP0038288A1/fr
Application granted granted Critical
Publication of EP0038288B1 publication Critical patent/EP0038288B1/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
    • H01H71/66—Power reset mechanisms
    • H01H71/70—Power reset mechanisms actuated by electric motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H2003/028—Rotating knob or lever or tumbler that can be turned or pushed by hand in only one direction, e.g. by making inaccessible one side of a tumbler
    • 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
    • H01H71/66—Power reset mechanisms
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/227—Interlocked hand- and power-operating mechanisms

Definitions

  • the invention relates to a power drive for direct switching on and off of a low-voltage circuit breaker with a motor and a gearbox, the output shaft of which carries a crank arm which acts on the circuit breaker at approximately 180 ° rotation per actuation process, and also with a manual actuating element which acts on the gearbox.
  • the invention has for its object to avoid separate gear parts for the additional manual actuator while maintaining the uncomplicated and safe handling.
  • the manual actuator is a rotary handle which is rigidly coupled to the output shaft of the transmission and that a one-way clutch is arranged between the output shaft and the other parts of the power drive.
  • the invention makes use of the fact that the output shaft is the slowest rotating shaft of the transmission and only makes half a revolution during an actuation process. It is therefore practically harmless to touch the manual actuator when the power drive starts automatically. On the other hand, a hindrance to manual operation with the help of the manual actuator by the gear parts of the power drive through the one-way clutch is completely avoided.
  • This one-way clutch forms a fairly simple component that can be easily accommodated in terms of construction without any significant increase or complication of the power drive.
  • a low-voltage circuit breaker 1 of the so-called compact design is shown in broken lines in its outline.
  • the low-voltage circuit breaker 1 has an insulating housing 2, in which a rocker arm 4 is pivotably arranged about a pivot bearing 3.
  • the rocker arm 4 is connected in a manner not shown to a switching mechanism which allows movable and fixed contacts to be brought into contact with one another and to be separated again in a known manner.
  • the low-voltage circuit breaker contains 1 devices for automatic shutdown in the event of overload and short circuit.
  • the low-voltage circuit breaker 1 can be designed such as this. B. is described in DE-B-2 811 441 or DE-B-2 817 667.
  • An actuating handle 5 is placed on the rocker arm 4 and protrudes from a central elevation 6 on the front side of the low-voltage circuit breaker 1.
  • This actuating handle interacts with a motor drive designated as a whole as 10, which is also fastened by means of screws 11 on the front of the low-voltage circuit breaker 1.
  • the main components of the motor drive 10 include a support plate 12 which is fastened to the insulating housing 2 by means of bends or attached angle pieces 7 and the screws 11 already mentioned.
  • a slide 14 is guided in the direction of the double arrow 15 between the pressed-out tabs 13.
  • a window-like opening 16 of the slide 14 encompasses the end of the actuating handle 5 and a cylindrical body 17 with bends 18 placed thereon. This is secured against radial escape by a guide track 20.
  • a motor gear unit 21 is also fastened on the support plate 12 and consists of a motor 22 with an axis lying parallel to the support plate 12 and a reduction gear 23 with an axis of rotation perpendicular to the support plate 12.
  • the output shaft 24 of the reduction gear 23 carries a crank arm 25 with a crank pin 26. This engages between the legs 27 of a leaf spring 30 which extends parallel to the plane of the slide 14 and transversely to its direction of movement (double arrow 15).
  • the leaf spring 30 is used for the elastic force transmission from the motor gear unit 21 to the slide 14, such that tolerance compensation is brought about in the end positions.
  • the crank arm 25 performs a rotation of approximately 180 °.
  • Two limit switches 31 and 32 which are also fastened to the support plate 12 and whose actuating levers 33 and 34 cooperate with an extension 35 of the slide 14, ensure that the motor 22 is stopped when the low-voltage circuit breaker 1 is switched on and off.
  • a cap 36 which is provided with an opening for the passage of a rotary handle 37.
  • This is rotatably attached to a shaft end of the output shaft 24 opposite the crank arm 25 and secured against removal by a collar 38.
  • the rotary handle 37 is thus constantly in engagement with the reduction gear 23 and is rotated when the low-voltage circuit breaker 1 is switched on and off by means of the motor drive 10.
  • the peripheral speed is relatively low because the output shaft 24 is the most strongly reduced shaft of the motor gear unit 21 and a turn angle of only about 180 ° is traveled to switch the low-voltage circuit breaker 1 on and off.
  • a schematically indicated one-way clutch 29 is inserted between the motor shaft 28 indicated by dashed lines and the output shaft 24.
  • the rotary handle 37 has a central web 40 in the case of an approximately cylindrical disk-shaped form, which is arranged symmetrically to an ideal diameter line.
  • the twist grip 37 has gripping surfaces 41 and 42 as well as opposing, continuous bevels 43 and 44.
  • the diameter of the twist grip 37 and thus the length of the gripping surfaces and bevels is approximately corresponding to the lengths of the human thumb and index finger when the position is bent Index finger selected.
  • the gripping surfaces 41 and 42 do not offer a sufficient possibility of attack due to their decreasing height. If the motor drive 10 is now surprisingly put into operation when an operator actuates the rotary handle in the manner indicated, the fingers are rejected by the bevels 43 and 44 without any risk of injury.
  • the motor drive 10 is now surprisingly put into operation when an operator actuates the rotary handle in the manner indicated, the fingers are rejected by the bevels 43 and 44 without any risk of injury.
  • the rotary handle is connected to the most strongly reduced shaft, namely the output shaft 24 of the reduction gear 23, and therefore only achieves a relatively low peripheral speed, also contributes to the safety, but also the shape of the rotary handle. With a low peripheral speed of the rotary handle, it can be entirely sufficient when the rotary handle has continuous gripping surfaces on both sides of the web 40, i. H. is executed without slopes.
  • the twist grip can be used not only for motor drives according to the exemplary embodiment described, but also for power drives that work with compressed air or other media.

Landscapes

  • Breakers (AREA)

Claims (1)

  1. Commande mécanique (10) pour la fermeture et l'ouverture directes d'un disjoncteur à basse tension (1), comportant un moteur (22) et une transmission (23), dont l'arbre mené (24) porte un bras de manivelle (25) qui agit sur le disjoncteur (1) en tournant d'environ 180° lors de chaque manoeuvre, ainsi qu'un organe de manoeuvre attaquant en supplément la transmission (23), caractérisée par le fait que l'organe de manoeuvre est une poignée tournante (37) qui est accouplée rigidement à l'arbre mené (24) de la transmission (23) et qu'un accouplement à roue libre (24) est monté entre l'arbre mené (24) et les autres pièces de la commande mécanique (10).
EP19810730036 1980-04-15 1981-03-19 Entraînement mécanique pour la connexion et la coupure directes d'un interrupteur de protection à basse tension Expired EP0038288B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803014828 DE3014828C2 (de) 1980-04-15 1980-04-15 Kraftantrieb für einen Niederspannungs-Schutzschalter
DE3014828 1980-04-15

Publications (2)

Publication Number Publication Date
EP0038288A1 EP0038288A1 (fr) 1981-10-21
EP0038288B1 true EP0038288B1 (fr) 1984-05-16

Family

ID=6100324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810730036 Expired EP0038288B1 (fr) 1980-04-15 1981-03-19 Entraînement mécanique pour la connexion et la coupure directes d'un interrupteur de protection à basse tension

Country Status (3)

Country Link
EP (1) EP0038288B1 (fr)
JP (1) JPS56165239A (fr)
DE (1) DE3014828C2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29622485U1 (de) * 1996-12-27 1997-03-27 Kopp Heinrich Ag Manuell betätigbare Not-Ein-Schaltvorrichtung für das Einschalten von Hauptkontakten eines mit Fernantrieb versehenen Leitungsschutzschalters

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697390C (de) * 1938-09-06 1940-10-12 Voigt & Haeffner Akt Ges Durch Motor und von Hand angetriebener elektrischer Schalter mit einer Kupplung zwischen Antrieb und Schaltorgan
GB869125A (en) * 1957-12-03 1961-05-31 Smith & Sons Ltd S Improvements in or relating to manipulating knobs for rotary elements
NL300256A (fr) * 1962-11-08
BE625880A (fr) * 1963-01-22
CH427962A (de) * 1965-11-18 1967-01-15 Bbc Brown Boveri & Cie Einrichtung zum zusätzlichen Handantrieb an einem durch einen Motor angetriebenen Stufenschalter
US4152561A (en) * 1977-08-23 1979-05-01 Westinghouse Electric Corp. Circuit breaker motor and handle clutch

Also Published As

Publication number Publication date
EP0038288A1 (fr) 1981-10-21
JPS56165239A (en) 1981-12-18
DE3014828A1 (de) 1981-10-22
DE3014828C2 (de) 1985-03-14

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