EP0047220B1 - Disjoncteur de protection à basse tension à levier de blocage - Google Patents

Disjoncteur de protection à basse tension à levier de blocage Download PDF

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Publication number
EP0047220B1
EP0047220B1 EP81730070A EP81730070A EP0047220B1 EP 0047220 B1 EP0047220 B1 EP 0047220B1 EP 81730070 A EP81730070 A EP 81730070A EP 81730070 A EP81730070 A EP 81730070A EP 0047220 B1 EP0047220 B1 EP 0047220B1
Authority
EP
European Patent Office
Prior art keywords
locking lever
lever
low
carrier
movable 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
EP81730070A
Other languages
German (de)
English (en)
Other versions
EP0047220A2 (fr
EP0047220A3 (en
Inventor
Bernhard Preuss
Werner Koziolek
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6718523&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0047220(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81730070T priority Critical patent/ATE10555T1/de
Publication of EP0047220A2 publication Critical patent/EP0047220A2/fr
Publication of EP0047220A3 publication Critical patent/EP0047220A3/de
Application granted granted Critical
Publication of EP0047220B1 publication Critical patent/EP0047220B1/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
    • H01H71/501—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
    • H01H71/10—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
    • H01H2071/502—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker with direct contact between manual operator and welded contact structure
    • 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
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S200/00—Electricity: circuit makers and breakers
    • Y10S200/42—Contact welding considerations

Definitions

  • the invention relates to a low-voltage circuit breaker with a housing and with at least one fixed and a movable contact arrangement, which comprises a support seated on a control shaft and a movable contact piece attached to it with the interposition of a contact force spring and which comprises an actuating handle, a drive lever, a drive spring and a toggle lever system acting on the carrier can be switched on and off, and with a locking lever against transferring the actuating handle into the switched-off position when the movable contact piece is blocked in the switched-on position.
  • a circuit breaker of this type is known from US-A-4165 453.
  • the locking lever is designed with two arms and can be pivoted about a bearing point which is formed by the knee joint bolt of the toggle lever system connected to the movable contact arrangement.
  • One lever arm of the locking lever is located within the windings of the drive spring, while the other lever arm rests on the movable contact arrangement, specifically on the hinge pin, which establishes the connection of the toggle lever system with the movable contact arrangement. Is there a blockage of the movable contacts in the on position, for. B.
  • the invention has for its object also to provide a locking lever arrangement for a circuit breaker of the type specified, but which is particularly easy to assemble and should therefore be used in those cases where it is important to deliver the switch either with or without a locking lever arrangement.
  • this object is achieved in that the locking lever is mounted in a bearing formed in the housing and is connected to the actuating handle with its end opposite the bearing, with a working surface of the locking lever of a counter surface of the movable contact arrangement with a in the undisturbed switch-on state an only partial movement of the actuating handle in the direction of its switch-off position corresponding distance and another working surface is opposite the knee joint pin of the knee lever system.
  • this locking lever there is therefore no need for an introduction to the drive spring. Rather, it is sufficient that the drive lever and the locking lever rest against one another via suitable surfaces. It is also advantageous that the operator operating the switch perceives a clearer limitation of the mobility of the actuating handle in the case of contact welding than is the case when the locking lever is connected to the drive spring.
  • the bearing point for the locking lever can be designed as a pocket-like recess in the housing of the low-voltage circuit breaker and can be located between the switching shaft and the fixed contact arrangement, preferably below the connecting line of these parts. In this area, the bearing point can be made from a molded material without additional effort during the manufacture of the housing of the circuit breaker. At the same time, the selected arrangement of the bearing point is favorable for the application of force to the movable contact arrangement.
  • the locking lever according to the invention is also suitable for exerting an opening force on the welded contact supports of the fixed and the movable contact arrangement.
  • the locking lever can be formed by a substantially flat shaped plate which has convex contours at its end which cooperates with the bearing point of the housing and at its opposite end which cooperates with the drive lever and which has one end to form the working surface which cooperates with the movable contact arrangement angled extension carries. Simple punching operations are therefore sufficient to produce the locking lever.
  • FIG. 1 shows a multi-pole low-voltage circuit breaker in a longitudinal section in the region of the middle pole provided with the drive mechanism in the switched-off, latched state.
  • FIGS. 2 and 3 show, with the omission of all other parts of the switch shown in FIG. 1, only the drive mechanism with the contact arrangement and the locking lever in the undisturbed switch-on position or when trying to switch it off with a faulty switch-on state.
  • the low-voltage circuit breaker 1 shown in FIG. 1 belongs to the type of the so-called compact switch. It has a housing 2 made of insulating material, which has a lower part 3 and an upper part 4, which are tightly connected to one another along a parting joint 5.
  • the current path of the low-voltage Schultz switch 1 extends from a first connection device 6 via a fixed contact arrangement 7 and a movable contact arrangement 8 as well as over one Current band 9 and a conductor 11 extending through a trigger unit 10 to a further connecting device 12.
  • the fixed contact arrangement comprises a conductor piece 13 fastened to the lower part 3 of the housing 2 and a contact pad 14 connected thereto.
  • a contact force spring 21 is arranged between the contact piece 16 and the carrier 17 and ensures the required contact pressure between the contact pads 14 and 15 when the circuit breaker is switched on.
  • a toggle lever system consisting of the levers 23 engages on the carrier 17 by means of a joint pin 18. Both levers are connected to one another by a knee joint bolt 24 and by a further bolt 25 to a main pawl 27 which can be pivoted about a bearing 26.
  • a drive spring 30 also acts on the knee joint pin 24, the opposite end of which is connected to the upper end of a drive lever 31 which can be pivoted about a fixed pivot bearing.
  • the drive lever 31 can be pivoted by hand by means of an actuating handle 33 placed on the drive lever 31, which protrudes through an opening 34 in the upper part 4 of the housing 2.
  • the main pawl 27 is supported in the latched state of the circuit breaker on a locking bolt 28, as can be seen in more detail in DE-C-28 17 667. Because of the precise description of the latching arrangement in this patent specification, no further details are mentioned in the present context.
  • the drive mechanism of the low-voltage circuit breaker 1 contains a locking lever 35, which is highlighted in FIGS. 2 and 3 by choosing a thicker line width.
  • the locking lever 35 is rounded at its lower end and engages with this rounded end 36 in a pocket-like recess 37 provided on the bottom of the lower part 3 of the housing 2.
  • the opposite end 40 of the locking lever 35 also has spherically rounded surfaces which interact with straight counter surfaces of the operating handle 33.
  • a working surface is formed by a bulge 38, which in the switched-on state is opposite the knee joint pin 24 of the knee lever 23 at a short distance.
  • the locking lever 35 has an extension 41 with an angle 42, which also forms a work surface. This interacts with a counter surface of the carrier 17 of the movable contact piece 16.
  • the actuating handle 33 is located near the left end of the recess of the upper part 4 of the housing 2 shown in FIG. 1.
  • the toggle levers 23 are under the influence of the drive spring 30 in a slight dead center position such that the movable contact arrangement assumes the switch-on position in which the contact pads 14 and 15 lie on one another with a force determined by the contact force spring 21.
  • the angled portion 42 of the locking lever 35 faces a counter surface of the carrier 17 at a short distance.
  • the lower part 3 of the housing 2 has the described bearing opening (recess 37).
  • the other parts or surfaces interacting with the locking lever are present in the switch mechanism anyway. Therefore, if a circuit breaker is to be equipped with a locking lever, this is inserted with its end 36 into the recess 37 during the assembly of the switch parts, whereby it is positioned appropriately with its upper end 40 for bearing against surfaces of the actuating handle 33 and with its angled portion 42 comes near the carrier 17.
  • the locking lever 35 is provided at its lower end with a continuous rounding corresponding to an arc.
  • the locking lever can also be provided with three spherical surfaces, which form sections of this circular arc, because the small pivoting angle of the locking lever 35 does not necessarily require a continuous rounding.
  • the point of attack of the bend 42 on the carrier 17 can be varied by different shape of the extension of the locking lever in order to exert a smaller or greater breaking force on the movable contact piece.
  • the arrangement of the bearing point (recess 37) is also subject to considerations of how great the desired breaking force should be or how the bearing point can best be arranged in the housing.
  • the bearing point (recess 37) is located at the deepest point of the lower part 3 of the housing 2 below the connecting line of the selector shaft and the fixed switching element 7.
  • the toggle levers described and also the locking lever can be present in pairs to even out the force application. The same applies to other elements of the switch, e.g. B. the feathers.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (4)

1. Disjoncteur de protection à basse tension (1) comportant un boîtier (2) et au moins un ensemble à contact fixe (7) et un ensemble à contact mobile (8), qui comporte un support (17) prenant appui sur un arbre de commutation (20), et une pièce de contact mobile (16) montée sur ce support moyennant le montage intercalé d'un ressort (21) fournissant la force de contact et qui peut être enclenché et déclenché à l'aide d'une poignée de manoeuvre (33), d'un levier d'entraînement (31), d'un ressort d'entraînement (30) et d'un système à leviers à genouillère (23) accroché au support (17), ainsi qu'un levier de blocage (35) réalisant un blocage contre l'amenée de la poignée de manoeuvre (33) dans la position déclenchée lors du blocage de la pièce de contact mobile (16) dans la position enclenchée, caractérisé par le fait que le levier de blocage (35) est monté dans un élément de support (37) ménagé par moulage dans le boîtier (2) et est relié par son extrémité (40), située à l'opposé du logement de support (37), à la poignée de manoeuvre (33), auquel cas, dans l'état enclenché non perturbé, une surface de travail (42) du levier de blocage (35) est en vis-à-vis d'une surface antagoniste de l'ensemble à contact mobile (8) en en étant située à une distance correspondant à un déplacement seulement partiel de la poignée de manoeuvre (33) en direction de sa position déclenchée, et une autre surface de travail (38) est disposée en vis-à-vis de l'axe d'articulation de genouillère (24) du système à leviers à genouillère (23).
2. Disjoncteur de protection à basse tension suivant la revendication 1, caractérisé par le fait que l'élément de support (37) du levier de blocage (35) est réalisé sous la forme d'un renfoncement en forme de poche du boîtier (2) du disjoncteur de protection à basse tension (1) et est situé entre l'arbre de commutation (20) et l'ensemble à contact fixe (7), de préférence au-dessous de la droite reliant ces pièces.
3. Disjoncteur de protection à basse tension suivant la revendication 1, caractérisé par le fait que le levier de blocage (35) est formé par une tôle profilée essentiellement plane qui possède des contours convexes au niveau de son extrémité (36) coopérant avec l'emplacement de support (37) du boîtier (2) et au niveau de son extrémité opposée (40) coopérant avec le levier d'entraînement (31), et est équipé d'un appendice saillant muni d'une partie coudée, de manière à former la surface de travail (42) coopérant avec l'ensemble à contact mobile (8).
4. Disjoncteur de protection à basse tension suivant la revendication 1, caractérisé par le fait que le levier de blocage (35) comporte une partie qui coopère, lors du déclenchement, avec l'axe d'articulation de genouillère (24) du système à leviers à genouillère (23) et qui agit avant la venue en contact de la partie coudée sur la surface antagoniste de l'ensemble à contact mobile (8).
EP81730070A 1980-08-29 1981-08-06 Disjoncteur de protection à basse tension à levier de blocage Expired EP0047220B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81730070T ATE10555T1 (de) 1980-08-29 1981-08-06 Niederspannungs-schutzschalter mit sperrhebel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8023509U 1980-08-29
DE8023509U DE8023509U1 (de) 1980-08-29 1980-08-29 Niederspannungs-Schutzschalter für Sperrhebel

Publications (3)

Publication Number Publication Date
EP0047220A2 EP0047220A2 (fr) 1982-03-10
EP0047220A3 EP0047220A3 (en) 1982-09-22
EP0047220B1 true EP0047220B1 (fr) 1984-11-28

Family

ID=6718523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730070A Expired EP0047220B1 (fr) 1980-08-29 1981-08-06 Disjoncteur de protection à basse tension à levier de blocage

Country Status (5)

Country Link
US (1) US4368444A (fr)
EP (1) EP0047220B1 (fr)
JP (1) JPS5770645U (fr)
AT (1) ATE10555T1 (fr)
DE (1) DE8023509U1 (fr)

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FR2360171A1 (fr) * 1976-07-30 1978-02-24 Unelec Mecanisme de commande de disjoncteur
FR2361737A1 (fr) * 1976-08-09 1978-03-10 Unelec Disjoncteur avec dispositif de verrouillage de la poignee de commande en cas de soudure des contacts
DE2808609C3 (de) * 1978-02-28 1980-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Niederspannungskippschalter

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Publication number Publication date
US4368444A (en) 1983-01-11
EP0047220A2 (fr) 1982-03-10
DE8023509U1 (de) 1980-11-27
JPS5770645U (fr) 1982-04-28
ATE10555T1 (de) 1984-12-15
EP0047220A3 (en) 1982-09-22

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