EP0637831B1 - Dispositif de rupture des contacts pour appareils interrupteur de protection - Google Patents

Dispositif de rupture des contacts pour appareils interrupteur de protection Download PDF

Info

Publication number
EP0637831B1
EP0637831B1 EP94111300A EP94111300A EP0637831B1 EP 0637831 B1 EP0637831 B1 EP 0637831B1 EP 94111300 A EP94111300 A EP 94111300A EP 94111300 A EP94111300 A EP 94111300A EP 0637831 B1 EP0637831 B1 EP 0637831B1
Authority
EP
European Patent Office
Prior art keywords
contact
switching lever
lever
movement
arrangement according
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
EP94111300A
Other languages
German (de)
English (en)
Other versions
EP0637831A1 (fr
Inventor
Peter Flohr
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.)
Heinrich Kopp GmbH and Co KG
Original Assignee
Heinrich Kopp GmbH and Co KG
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 Heinrich Kopp GmbH and Co KG filed Critical Heinrich Kopp GmbH and Co KG
Publication of EP0637831A1 publication Critical patent/EP0637831A1/fr
Application granted granted Critical
Publication of EP0637831B1 publication Critical patent/EP0637831B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H71/52—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
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20558—Variable output force
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/206—Adjustable

Definitions

  • the invention relates to a device for tearing open a Welding tending electrical contact pairing from one stationary and a contact movable away from this, in particular in a protective switching device.
  • a disadvantage of the use of heterogeneous materials for such Contact pairs, however, is that they have poorer arcing characteristics have. It also includes their use significant manufacturing problems, particularly because contact with a low tendency to sweat is also poor can apply a contact carrier.
  • DE-A-31 19 910 describes a device of the type mentioned Genus disclosed in which a current-carrying contact lever at one end a contact point for a fixed contact piece has and at its other end rotatable on one Pen is stored.
  • the contact lever itself is with a compression spring acted upon and after triggering to achieve a high Contact tear force at the first moment of triggering around a housing-fixed Nose swiveling.
  • a second movement phase then there is a further pivoting of the contact lever itself around a housing-fixed nose further away from the contact, by one until the end of the pivoting movement of the contact lever long contact opening path with comparatively fewer others To achieve opening force.
  • a disadvantage of this known device is that on the one hand one with two different ones Nose-configured housing design for various swivel situations is to be provided. It is also known in this Contact device required, the contact lever, the forms the contact that can be moved away from the fixed contact, expensive to remodel itself so that it matches the different phases of movement including direct spring loading, enough. This also makes it impossible to use conventional ones To provide contact orders with a corresponding device or existing circuit breaker contact configuration without Modification of the contacts themselves with a modified one as desired Retrofit invention characteristic.
  • the invention has for its object a device genus mentioned at the beginning with a conventional contact pairing to make available despite the risk of contact welding the use of noble homogeneous materials for the contacts enables.
  • the direction of displacement of the rotary thrust joint is preferred oriented so that the gear lever in a second movement section in the rotary slide joint either additionally, i.e. with the rotary motion superimposed, or separately, i.e. without Superposition of a rotary movement, displaceable and in a third Movement section with low opening force due to comparatively lower leverage is pivotable about the rotary slide joint.
  • a shift lever is therefore advantageous Application that is in an on state, i.e. in the Standby position, between a fixed contact point, the is formed, for example, in a switchgear housing, and a holding device preferably formed with a pawl biased by a switch spring in the contact opening direction is.
  • the shift lever turns initially under the action of the switch spring around its contact point, in particular its housing stop, in the contact tear direction.
  • the force of the switching spring is so advantageous by Lever ratio on the gear lever translates to the tearing force at the moving contact is considerably larger than when the rotation from the beginning around the fixed bearing journal, for example in Housing, would take place.
  • the location of the investment point and that of Rotary thrust joint are selected in such a way that the Line of action of the force directed at the movable contact coincides with the direction of movement of the contact when opening and then reducing the force by swiveling the Shift lever diverges.
  • the rotary thrust joint is preferably with a stationary or housing-fixed bearing journal formed, which is guided in an elongated hole.
  • the one for preloading of the shift lever provided switching spring is preferably on the articulated first leg, the line of action of the switching spring force is chosen such that the length of the resulting Lever arm for the pivoting movement of the shift lever in the third Movement section compared to that in the first movement section decreased.
  • the holding device mentioned above is particularly simple Formed with a detachable latch lock to which A ratchet lever belongs when used in switchgear.
  • 1 and 2 is a device 10 for tearing open electrical contact pairing tending to weld from one stationary contact 11 and a contact movable away from it 12 shown for use in a protective switching device is provided.
  • the movable contact 12 is arch-like configured and at its opposite end at 13 hinged to the housing.
  • the contact closing force is about one Articulated member 14 applied that a pressure spring 15 is supported at its other end on the housing. For simplification was on the representation of appropriate contact coatings waived.
  • the shift lever 17 has a first leg 18 for the attack a holding device 19 and a second leg 20 for the Attack on the movable contact 12 in the application area 16 on. Between his two legs 18 and 20 is the Shift lever 17 is rotatably displaceable by means of a rotary sliding joint 21 stored.
  • the rotary thrust joint 21 consists of a stationary Bearing pin 22, which is guided in an elongated hole 23.
  • the contact point 24 is based on a flat housing surface 27, which is also pivoted as a stop for the Contact surface 26 acts, see FIG. 2.
  • a pawl 28 is located on the first leg 18 of the shift lever 17 integrally formed with a ratchet lever 29 an embodiment the holding device 19 shows as a ratchet lock.
  • the Jack lever 29 is also pivotally mounted on the housing and can from the latched state after pivoting in the state shown in dashed lines by applying a Force K to be brought to its other lever end.
  • a switch spring 30 hinged at its other end is attached to the housing.
  • Fig. 1 the leverage ratios are shown, which on the Shift lever 17 in its standby position due to the Actuation by the switching spring 30 and the support of the Shift lever 17 by means of its contact point 24 on the flat Housing wall 27 with respect to a tear force F for the movable Contact 17 result.
  • FIG. 2 A comparison with the representation in FIG. 2, in which the shift lever 17 its end position in the open position has achieved that now due to changed Leverage ratios a ': b' different ratios prevail than before with the leverage ratio a: b.
  • Fig. 3 shows clearly the course of the tear force F over the Contact opening path S. Accordingly, in the first movement section, in which a high tear force F is required, the force achievable by the device is extremely high, then falls in an extremely short second movement section due to the displacement of the shift lever 17 in the rotary thrust joint 21 gradually to a significantly lower value F ', which is then determined by the engagement relationships between the second Leg 20 and the loading section 16 slightly increases again.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Push-Button Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Scissors And Nippers (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Contacts (AREA)
  • Motor Or Generator Frames (AREA)

Claims (9)

  1. Dispositif destiné à détacher des contacts électriques tendant au soudage composés d'un contact fixe (11) et d'un contact mobile (12) par rapport au premier, plus particulièrement dans un disjoncteur de protection, avec un levier de commande (17) en précontrainte dans la direction de détachement des contacts et pouvant pivoter autour d'un pivot articulé et cylindrique (21) à partir d'une position d'attente, lequel levier (17) est destiné à actionner le contact mobile (12), et un dispositif (19) par l'intermédiaire duquel le levier de commande (17) peut être maintenu en position d'attente, la direction de coulissemement du pivot articulé et cylindrique (21) étant orientée de telle façon que le levier de commande (17), pour atteindre une force d'arrachement élevée, peut être pivoté autour d'un point d'appui (24) avec un grand rapport des leviers dans une première phase de mouvement à partir de la position d'attente.
  2. Dispositif suivant la revendication 1, caractérisé en ce que le levier de commande (17) présente une première branche (18) destinée à engréner le dispositif d'arrêt (19) et une seconde branche (20) destinée à engréner le contact mobile (12), ledit levier de commande (17) étant disposé de manière à pouvoir coulisser et tourner (21) entre ses deux branches et de manière à pouvoir pivoter (24) sur la seconde branche (20).
  3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que la direction de coulissement du pivot articulé et cylindrique (21) est telle que le levier de commande (17) peut coulisser en plus ou séparément dans une seconde phase de mouvement dans le pivot articulé et cylindrique (21) et peut pivoter autour du pivot articulé et cylindrique (21) dans un troisième segment de mouvement avec une force d'ouverture réduite par un rapport des leviers comparativement plus petit.
  4. Dispositif suivant la revendication 2 ou 3, caractérisé en ce que les positions du point d'appui (24) et du pivot articulé et cylindrique (21) sont telles que la ligne d'action de la force dirigée vers le contact mobile (12) coïncide avec la direction de mouvement du contact lors de l'ouverture et diverge ensuite avec une diminution de force en raison du pivotement du levier de commande (17).
  5. Dispositif suivant l'une ou l'autre des revendications 2 à 4, caractérisé en ce que le pivot articulé et cylindrique (21) est formé par un palier fixe (22) guidé dans un trou oblong (23).
  6. Dispositif suivant l'une ou l'autre des revendications 2 à 5, caractérisé en ce que le levier de commande (17) présente de part et d'autre du point d'appui (24) des surfaces d'appui (25, 26) formant un angle l'une par rapport à l'autre.
  7. Dispositif suivant l'une ou l'autre des revendications ci-dessus, caractérisé en ce qu'un ressort de commande (30) est prévu pour mettre sous précontrainte le levier de commande (17), lequel ressort est articulé sur la première branche (18).
  8. Dispositif suivant la revendication 7, caractérisé en ce que la ligne d'action de la force du ressort de commande est telle que la longueur (a, a') du bras de levier qui en résulte pour le pivotement du levier de commande (17) dans la troisième phase de mouvement diminue par rapport à celle dans la première phase de mouvement.
  9. Dispositif suivant l'une ou l'autre des revendications ci-dessus, caractérisé en ce que le dispositif d'arrêt (19) est formé par un cliquet amovible (28, 29).
EP94111300A 1993-08-03 1994-07-20 Dispositif de rupture des contacts pour appareils interrupteur de protection Expired - Lifetime EP0637831B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326067A DE4326067A1 (de) 1993-08-03 1993-08-03 Kontaktaufreißeinrichtung für Schutzschaltgeräte
DE4326067 1993-08-03

Publications (2)

Publication Number Publication Date
EP0637831A1 EP0637831A1 (fr) 1995-02-08
EP0637831B1 true EP0637831B1 (fr) 1998-05-13

Family

ID=6494374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111300A Expired - Lifetime EP0637831B1 (fr) 1993-08-03 1994-07-20 Dispositif de rupture des contacts pour appareils interrupteur de protection

Country Status (9)

Country Link
US (1) US5502285A (fr)
EP (1) EP0637831B1 (fr)
AT (1) ATE166181T1 (fr)
AU (1) AU670881B2 (fr)
DE (3) DE4326067A1 (fr)
ES (1) ES2117740T3 (fr)
HK (1) HK1007460A1 (fr)
SG (1) SG44552A1 (fr)
TR (1) TR27888A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542690A1 (de) * 1995-11-16 1997-05-22 Aeg Niederspannungstech Gmbh Vorrichtung zum zwangsweisen Trennen von Netzleitungen bei Schaltgeräten
US6714108B1 (en) 2003-04-02 2004-03-30 Eaton Corporation Circuit breaker including mechanism for breaking tack weld

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049956B (fr) * 1956-03-27
DE1140269B (de) * 1961-02-04 1962-11-29 Continental Elektro Ind Ag Leistungsselbstschalter
DE1140630B (de) * 1962-03-01 1962-12-06 Stotz Kontakt Gmbh Installationsselbstschalter
DE1640996A1 (de) * 1967-12-23 1970-12-10 Licentia Gmbh Schaltmechanismus fuer elektrische Schaltgeraete
DE2015624A1 (de) * 1970-04-02 1971-10-21 Bbc Brown Boveri & Cie Selbstschalter
US3953697A (en) * 1973-11-28 1976-04-27 Teichert Allen L Dual fulcrum switch
US4061895A (en) * 1976-01-21 1977-12-06 Cutler-Hammer, Inc. Higher rated double-pole trigger switch
NL8101663A (nl) * 1980-05-28 1981-12-16 Weber Ag Fab Elektro Contactinrichting voor een schakelaar.
DE9302253U1 (fr) * 1993-02-17 1993-04-22 Kloeckner-Moeller Gmbh, 5300 Bonn, De

Also Published As

Publication number Publication date
SG44552A1 (en) 1997-12-19
AU6876694A (en) 1995-02-16
AU670881B2 (en) 1996-08-01
EP0637831A1 (fr) 1995-02-08
ES2117740T3 (es) 1998-08-16
DE9321552U1 (de) 1999-09-02
ATE166181T1 (de) 1998-05-15
DE4326067A1 (de) 1995-02-09
DE59405942D1 (de) 1998-06-18
US5502285A (en) 1996-03-26
HK1007460A1 (en) 1999-04-09
TR27888A (tr) 1995-10-11

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