EP0578188A1 - Appareil de commutation électrique - Google Patents

Appareil de commutation électrique Download PDF

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Publication number
EP0578188A1
EP0578188A1 EP93110746A EP93110746A EP0578188A1 EP 0578188 A1 EP0578188 A1 EP 0578188A1 EP 93110746 A EP93110746 A EP 93110746A EP 93110746 A EP93110746 A EP 93110746A EP 0578188 A1 EP0578188 A1 EP 0578188A1
Authority
EP
European Patent Office
Prior art keywords
lever
spring
switch
contact
contact lever
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.)
Withdrawn
Application number
EP93110746A
Other languages
German (de)
English (en)
Inventor
Richard Kommert
Klaus-Peter Eppe
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0578188A1 publication Critical patent/EP0578188A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to an electrical switching device, in particular an electrical circuit breaker, residual current circuit breaker, motor protection switch or the like.
  • an electrical switching device in particular an electrical circuit breaker, residual current circuit breaker, motor protection switch or the like.
  • the first lever arm serves as a switching handle and the second lever arm of the contact lever in the region of the free end of the second lever arm is rotatably mounted on a joint and with a latch having a latching point and a pivotable contact lever.
  • Such switch locks have - as usual - a latching point and a storage spring, the energy of which is released during the unlatching and transferred to the movable contact piece in order to separate the movable contact piece from the fixed contact piece.
  • Switch locks are known in large numbers.
  • DE-AS 25 16 594 shows a rear derailleur with a contact lever pivotable about a first fixed pivot point.
  • the contact pressure is generated by a spring, which is supported on the one hand on the contact lever and on the other hand on a toggle lever which is itself supported in a second pivot point.
  • the toggle lever forms a latching point with a lever mounted on the first rotary lever, an impact anchor acting on the lever for unlatching.
  • the toggle lever is mounted on an angle lever, which is also mounted in a fixed, third pivot point.
  • a switch toggle for manual switch-on is not shown. Without a switch toggle, there are a total of seven parts that make up the switch lock.
  • DE-PS 34 25 996 shows a switch lock with a movable contact piece, a drive lever, a handle, a ratchet lever and a toggle lever with two lever arms, one of the lever arms being articulated on a switching shaft on which the movable contact piece is mounted.
  • the ratchet lever rests on a latching point.
  • This switch lock is also relatively complicated and has more than seven parts.
  • the switch lock described in DE-PS 37 17 733 shows a fixed axis on which a contact lever, a release lever, a pawl carrying lever and a leg spring are mounted. Furthermore, the switch lock has a switch toggle, which is coupled to the pawl carrying lever via a releasable tab. Here, too, there are more than seven parts that together form the switching lock.
  • the object of the invention is to provide a switching device of the type mentioned, the switch lock is considerably simplified when forming a latching point compared to the known switch locks, in particular in which significantly fewer parts must be provided.
  • This object is achieved in that there is a latching point between the switching knob and the contact lever in the region of the second lever arm, in which the contact lever is latched by means of a first spring, the first spring exerting a torque around the bearing point of the switching knob on the contact lever and thus creates the contact force.
  • a further advantageous embodiment of the invention can go that the latching point has a latch lever which is integrally formed on the contact lever and is designed to be resilient in itself.
  • This pawl lever molded onto the contact lever interacts with the contact lever, insofar as these two form a latching point with one another in accordance with the characterizing features of claim 3.
  • a second spring is provided which exerts a torque in the opposite direction, the torque of the first spring being greater in the switch-on position and smaller than the torque of the second spring in the switch-off position.
  • the direction of force of the second spring is oriented so that it holds the contact lever and the switching knob in the off position.
  • a switching lock is created which has only four parts, namely the switching toggle, the contact lever and the first and second springs.
  • the first spring In the latched state, the first spring always acts in the closing direction of the switch, whereas the second spring is oriented and acts on the switching knob at such an angle that the component acting in the opening direction is small compared to the spring force.
  • the direction of force of the second spring changes with the movement of the articulation point between the second lever arm and the contact lever in such a way that the force or force exerted on the switching knob the torque is significantly greater than the torque originating from the first spring.
  • the articulation point of the second spring is displaced on the gear knob, whereas the stationary articulation point remains fixed, as a result of which the angle between the connecting line of the stationary articulation point of the second spring and the bearing point of the gear knob changed; in the on position the angle is very small, whereas in the off position it is significantly enlarged.
  • the lever elements are only indicated by lines to represent the switch lock.
  • the switch lock has a switch toggle 10, which is designed as a double arm lever and is rotatably mounted about a fixed bearing 11.
  • the first lever arm 12 of the double arm lever 10 forms the switching handle with which the switch can be switched on and off manually.
  • the shift knob 10 also has a second lever arm 13, the two lever arms 12 and 13 forming an obtuse angle with one another.
  • the second lever arm 13 is approximately twice as long as the first lever arm 12.
  • a contact lever 15 is pivotably articulated at a distance d from the free end of the second lever arm 13 at a distance d from the free end of the second lever arm 13 there is an articulation point 14 to which a contact lever 15 is pivotably articulated.
  • the distance d is approximately 1/5 of the length l of the second lever arm 13.
  • the contact lever articulated approximately at its center on the joint 14 on the lever arm 13 has at its end opposite the bearing point 11 a contact piece 16 which is only shown schematically and which serves as a movable contact piece and cooperates with a fixed contact piece, not shown.
  • a projection 18 is fastened approximately perpendicular to the lever arm 13, which crosses the lever arm 13 in the position shown in FIG. 1 and interacts with a latching lever 19 at the free end opposite the end point 17, which is connected to the lever arm 13.
  • the latch lever 19 is resiliently formed on the lever arm 13.
  • a compression spring 20 which is merely represented by an arrow, engages, the other end of which is fixedly attached to a clamping point 21.
  • another spring 22 engages, the other end of which is likewise fixed in place at an articulation point 23.
  • the two lever arms 12 and 13 form, as mentioned above, an obtuse angle, which is designated by the reference number ⁇ 2.
  • the direction of force of the spring 20 forms an angle ⁇ 1 with the connecting line of the articulated axes 11 and 14,
  • the contact lever 15 forms an angle ⁇ 3 with the connecting line of the two articulated axes 11 and 14, the angles ⁇ 1 and ⁇ 3 about the articulated axis 14 from the connecting line of the articulated axes 11 and 14 are counted out.
  • the articulation point 23 for the spring 22 is arranged on the side of the connecting line of the axes 11 and 14 lying on the contact point or the movable or fixed contact piece, the direction of force of the spring 22 forming approximately a right angle ⁇ 4 with the contact lever 15.
  • FIG. 3 also shows the so-called free release position I.
  • the switching handle 12 and thus the switching knob 10 are held in place and by a release force, which is represented by the arrow F2, the release point is released.
  • the force of the spring 22 generates a torque around the rotary bearing 14 and thereby the contact opening force F 1 is generated. If the control handle 12 is now held further, the movable contact lever 15 rotates until it stops, as shown in FIG. 4, on a fixed bearing 24.
  • FIG. 4 is the so-called free release position II when the control handle 12 is held. The release position is reached because the spring force 21 moves the switch lock into this switch-off position and holds it there in a stable manner.
  • the switching handle 12 is rotated clockwise around the axis of rotation 11 until the movable contact piece 16 attaches to the fixed contact piece, not shown, which is characterized in FIG. 1 by the arrow F 3.
  • FIG. 5 shows an insight into a circuit breaker housing 50.
  • the bottom surface of the housing 50 has a recess 51 with a fixed nose 52 and a movable nose 53, with which the switch housing can be snapped onto a top-hat rail.
  • the housing 50 has terminals 54 and 55, of which the terminal 54 shown on the left is connected to a connecting conductor 56 with a fixed contact piece 57 which interacts with a movable contact piece 58 which is attached to a contact lever 59.
  • a switch toggle 60 is rotatably mounted on an axis 61, which is equipped as a double arm lever with a first lever arm 62 serving as a switching handle and a second lever arm 63, whereby at the free end of the second lever arm 63 via an axle bearing 64 which is also known as Double-arm lever trained contact lever 59 is mounted.
  • a nose 65 is formed on the end of the contact lever 59 opposite the movable contact piece 58.
  • a U-shaped arm 66 is formed on the switching knob 60, for example in the area of the axis 61, the open side of the U-shape pointing towards the axis 61.
  • the free leg 68 has a latching lug 70 which, together with the lug 65, forms a latching point.
  • the arm 66 with the leg 68 and the web 67 corresponds to the latch lever 19 of the embodiment according to FIGS. 1 to 4.
  • the nose 65 is the part which has been given the reference number 18 in the embodiments according to FIGS. 1 to 4.
  • the switch according to FIG. 5 has an arc quenching chamber 71 which, as can be seen, brings about a zero point quenching. Furthermore, the switch according to FIG. 5 has an electromagnet system 72 with which the switch can be actuated, in which, for example, the arm 68 is bent in the direction of the arrow V, so that the latching point 65/70 is released.
  • FIG. 6 only shows a shift knob 80.
  • This shift knob is rotatably mounted in the housing 50 with an axis 81, which corresponds to the axis 61.
  • the switch toggle 80 is also designed as a double-arm lever with a first lever arm 82, which serves as a switching handle, and with a second lever arm 83, which has a boomerang-like shape and has an axle bearing 84 at its free end, on which one corresponds to the contact lever 59 , not shown contact lever can be stored.
  • An approximately V-shaped projection 85 is provided on the switching knob 80 in a manner similar to the switching knob 60; with one arm 86, the projection 85 connects to the switching knob 80 and the other leg 87 points to the second lever arm 83.
  • a projection 88 is provided, which corresponds to the detent 70 and against which a nose corresponding to the nose 65 of the contact lever 59 can engage.
  • the essential difference between the embodiments of FIGS. 5 and 6 is that the projection 85 is formed on the other side of the switching knob 80 than the arm 66 on the switching knob 60.
  • the first lever arm 62 or 82 corresponds to the first lever arm 12 of FIG. 1 and the second lever arm 63 or 83 corresponds to the second lever arm 13.
  • the bearing points 64 and 84 correspond to the bearing point 14 and the contact lever 59 to the contact lever 15.
  • the invention is not restricted to the exemplary embodiment shown in the above description. she can can of course be realized in many designs and configurations. In particular, it can be implemented in all types of electrical switching devices in which a latching point is present, for. B. with a line, residual current, motor protection switch or a circuit breaker.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Breakers (AREA)
EP93110746A 1992-07-10 1993-07-06 Appareil de commutation électrique Withdrawn EP0578188A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4222752 1992-07-10
DE4222752 1992-07-10
DE4320210A DE4320210A1 (de) 1992-07-10 1993-06-18 Elektrisches Schaltgerät
DE4320210 1993-06-18
GB9326304A GB2285177A (en) 1992-07-10 1993-12-23 Electrical switching device

Publications (1)

Publication Number Publication Date
EP0578188A1 true EP0578188A1 (fr) 1994-01-12

Family

ID=27203956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93110746A Withdrawn EP0578188A1 (fr) 1992-07-10 1993-07-06 Appareil de commutation électrique

Country Status (3)

Country Link
EP (1) EP0578188A1 (fr)
DE (1) DE4320210A1 (fr)
GB (1) GB2285177A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112005331A (zh) * 2018-04-05 2020-11-27 Abb瑞士股份有限公司 用于操纵断路器的装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19507605C1 (de) * 1995-03-04 1996-08-22 Abb Patent Gmbh Verklinkungseinrichtung für elektrische Schalter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806103A (en) * 1954-01-21 1957-09-10 Westinghouse Electric Corp Circuit breaker
US2925481A (en) * 1954-10-07 1960-02-16 Gen Electric Circuit breaker
FR1239387A (fr) * 1959-07-15 1960-08-26 Interrupteurs-disjoncteurs unipolaires perfectionnés
DE1763097A1 (de) * 1968-04-03 1971-09-02 Licentia Gmbh Mechanismus fuer Selbstschalter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214535A (en) * 1963-02-27 1965-10-26 Cutler Hammer Inc Electric circuit breaker with positive tripping means
DE1463399A1 (de) * 1964-10-30 1969-03-27 Licentia Gmbh Selbstschalter,insbesondere Installationsselbstschalter
DE1588491C3 (de) * 1967-10-12 1975-05-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mechanismus für Selbstschalter
DE1908723A1 (de) * 1969-01-20 1970-09-03 Mais Adolf Rolf Schaltmechanismus fuer Selbstschalter
US3950714A (en) * 1974-09-18 1976-04-13 Westinghouse Electric Corporation Self-adjusting circuit breaker with rotating trip assembly
CH607309A5 (fr) * 1975-09-25 1978-11-30 Siemens Ag
ES236244Y (es) * 1977-06-02 1978-11-16 Interruptor electrico automatico.
DE3149375A1 (de) * 1981-12-12 1983-06-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kontaktanordnung fuer einen selbstschalter
DE3530635A1 (de) * 1985-08-28 1987-03-12 Bbc Brown Boveri & Cie Schaltwerk fuer einen elektrischen schalter
FR2610760B1 (fr) * 1987-02-10 1993-05-14 Serd Soc Et Realisa Disjonct Interrupteur automatique multipolaire basse-tension a commande manuelle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806103A (en) * 1954-01-21 1957-09-10 Westinghouse Electric Corp Circuit breaker
US2925481A (en) * 1954-10-07 1960-02-16 Gen Electric Circuit breaker
FR1239387A (fr) * 1959-07-15 1960-08-26 Interrupteurs-disjoncteurs unipolaires perfectionnés
DE1763097A1 (de) * 1968-04-03 1971-09-02 Licentia Gmbh Mechanismus fuer Selbstschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112005331A (zh) * 2018-04-05 2020-11-27 Abb瑞士股份有限公司 用于操纵断路器的装置

Also Published As

Publication number Publication date
GB9326304D0 (en) 1994-02-23
DE4320210A1 (de) 1994-01-13
GB2285177A (en) 1995-06-28

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