EP1334499A1 - Dispositif de contact pour disjoncteurs de protection limiteurs de courant - Google Patents

Dispositif de contact pour disjoncteurs de protection limiteurs de courant

Info

Publication number
EP1334499A1
EP1334499A1 EP01996905A EP01996905A EP1334499A1 EP 1334499 A1 EP1334499 A1 EP 1334499A1 EP 01996905 A EP01996905 A EP 01996905A EP 01996905 A EP01996905 A EP 01996905A EP 1334499 A1 EP1334499 A1 EP 1334499A1
Authority
EP
European Patent Office
Prior art keywords
contact
springs
bridge
contact force
designed
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Withdrawn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
EP01996905A
Other languages
German (de)
English (en)
Inventor
Volker Heins
Franz Böder
Guido Dedenbach
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.)
Eaton Industries GmbH
Original Assignee
Moeller 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 Moeller GmbH filed Critical Moeller GmbH
Publication of EP1334499A1 publication Critical patent/EP1334499A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/32—Self-aligning contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts

Definitions

  • the invention relates to a contact arrangement for current-limiting circuit breakers in the low-voltage range, in particular for current-limiting circuit breakers, according to the preamble of claim 1.
  • Each pole comprises two fixed contacts connected to connecting rails, a rotary contact bridge that extends along the longitudinal axis of the pole in a playful receptacle of the selector shaft and has opposing contact pieces that interact with the fixed contacts in the switched-on position, and two attached inside the selector shaft
  • Tension springs which act on the contact bridge and thus ensure a fixed contact pressure of the contact pieces on the fixed contacts, one of the ends of each tension spring interacting with a driver element of the selector shaft.
  • the two springs are mounted in the contact bridge receptacle with the other end of each spring attached to a contact bridge fastener.
  • the two fastening elements or driver elements of the two springs are diametrically opposed with respect to an imaginary axis of rotation of the contact bridge or the fixed transverse axis of the selector shaft.
  • This arrangement of the springs ensures free movement of the imaginary axis of rotation of the contact bridge in relation to the fixed transverse axis of the selector shaft and at the same time enables a moment of force for uniform distribution of the contact pressure and an elastic positioning of the contact bridge with two translational degrees of freedom, the contact bridge is held in an equilibrium position on the longitudinal axis by the self-centering action of the springs.
  • connection rails with the fixed contacts are loop-shaped, so that when a short-circuit current flows through them, the contact bridge generates repulsive electrodynamic forces against the force of the tension springs in the direction of a repulsion position.
  • This contact arrangement neither permits adaptation to a desired profile of the restoring force acting on the electrodynamically repelled contact bridge nor the possibility of allowing the electrodynamically repelled contact bridge to be tilted.
  • an opposite end of the springs mentioned is mounted on the ends of a slidingly arranged pin in the cutout of the selector shaft, designed as a transverse axis, and has the contact link symmetrical to its axis of rotation
  • Pair of control cams which are designed so that they cooperate with one of the pins in the end portion of the repulsion stroke of the contact bridge to brake the movement of the contact bridge.
  • the pins are slidably mounted in the recesses, the diametrically opposite recesses running approximately along the line of action of the associated springs.
  • the springs ensure elastic positioning of the contact bridge in the cutout of the selector shaft and thereby define a fictitious axis of rotation of the contact bridge in relation to the selector shaft.
  • the profile of the control cams arranged in relation to the movable contact pieces causes a displacement of the pins in the recess and a continuous tension of the springs corresponding to the pivoting movement of the contact bridge in the direction of the repulsion position, with a storage of the energy in the springs.
  • the profile of the control cams can be designed so that the contact bridge locks in the push-off position; wherein the rotatably mounted switching shaft is actuated by an actuating mechanism of the circuit breaker and the opening stroke of the contact bridge is limited such that the rotation of the switching shaft during the opening movement causes the pins to lift off the control cams causes.
  • the invention has for its object to obtain a more favorable course of the contact force via the so-called lifting of the contact bridge in the switch-on position, which compensates for the wear of the contacts and contact pieces that occurs over time.
  • An advantageous further development consists in the formation of a locking recess in the part of the control cams which can be assigned to the end of the repelling movement.
  • a further advantageous development consists in that the direction of the cutouts runs approximately parallel to the longitudinal axis of the contact bridge in order to set the optimal contact force curve via the through stroke.
  • An expedient embodiment of the invention consists in connecting pairs of contact force springs arranged on opposite sides of the contact bridge, designed as tension springs, via the sliding elements designed as transverse pins, the pins constantly contacting the control cams in a non-positive manner.
  • a an alternative embodiment is to mount contact force springs, which are arranged on the end face of the contact bridge and are designed as compression springs, directly in the cutouts, wherein slide elements designed as plungers constantly bear non-positively on the control cams.
  • the contact arrangement is suitable for modular, multi-pole contact systems.
  • Figure 1 in longitudinal section a first embodiment of the contact arrangement according to the invention in the ON position
  • FIG. 2 the contact arrangement according to FIG. 1 during through-stroke as a result of noticeable contact wear
  • FIG. 3 the contact arrangement according to FIG. 1 in the push-off position
  • Figure 4 in longitudinal section, a second embodiment of the contact arrangement according to the invention in the switched-on position.
  • the contact arrangement 2 according to FIGS. 1 to 3 is provided for one pole of a multi-pole circuit breaker, not shown in any more detail.
  • the circuit breaker typically comprises an insulating housing, a switch lock that can be actuated by a drive, supply and output connection elements and tripping devices for overload and short circuit.
  • a switching shaft 6 made of insulating material is rotatably mounted in the housing about a fixed transverse axis 4, the transverse axis 4 running perpendicular to the longitudinal direction 8 of the pole.
  • the switching shaft 6 coupled to the switching lock is composed of switching shaft segments assigned in poles in the form of double disks, of which only the rear disk is shown.
  • a rotary contact bridge 10 extends along the Longitudinal direction 8 of the pole in a playful receptacle 12 of the control shaft 6 and has mutually opposite contact pieces 14 which cooperate with fixed contacts 16 in the switched-on position.
  • the two disks of the control shaft 6 are connected via two drivers 18.
  • each elongated recess 20 there are diametrically and rotationally symmetrical recesses 20 which, in the switched-on position (FIGS. 1 and 2), run approximately parallel to the longitudinal direction 8.
  • a sliding element 22 which is arranged parallel to the transverse axis 4, is displaceably mounted in the form of a pin made of steel.
  • two contact force tension springs 24 arranged on both sides of the contact bridge 10 are suspended at their ends 26.
  • fastening elements 28 are provided in the switching shaft 6, to which the second ends 30 of the contact pressure spring 24 are fastened.
  • the control cams 32 are aligned with respect to the line of action of the contact force springs 24 in such a way that the contact bridge 10 assumes a stable position about a fictitious axis of rotation with two translational degrees of freedom in certain areas.
  • the two fastening elements 28 are arranged diametrically with respect to the fixed transverse axis 4 and the sliding elements 22 are arranged diametrically with respect to the fictitious axis of rotation.
  • the geometrical design of the control cams 32 and the alignment of the cutouts 20 with respect to the lines of action of the contact force springs 24 and the longitudinal axis 8 produce a contact force which is as balanced and increasing as possible over the life of the contacts 14, 16.
  • a connecting rail 34 is connected to each of the two fixed contacts 16.
  • the contact arrangement 3 according to FIG. 4 acts in principle in the same way as that described above, which is why the following description is essentially limited to the differences.
  • the sliding elements 23 are designed here as plungers, which are attached to the first ends 26 of two contact force springs 25 designed as compression springs and also press against the control cams 32 of the contact bridge 10.
  • the contact force springs 25 are supported against the boundaries 38 of the partially cylindrical recesses 21, which are directed away from the transverse axis 4.
  • the present invention is not limited to the embodiment described above, but also encompasses all embodiments having the same effect in the sense of the invention.
  • the invention can be modified such that the control cams are designed in such a way that the contact bridge does not assume a tilted position in the event of electrodynamic repulsion. Circuit breakers equipped with such contact arrangements are advantageously suitable for selective switch arrangements.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

Dispositif de contact pour disjoncteurs de protection limiteurs de courant dans la plage des basses tensions, en particulier pour sectionneurs de puissance limiteurs de courant. L'objet de la présente invention est d'obtenir une meilleure progression de la force de contact sur la course excessive d'un dispositif de contact (2) se produisant en raison de l'usure des contacts. Dans le dispositif de contact selon la présente invention, un pont de contact rotatif (10) est suspendu dans un arbre de commutation (6) par des ressorts (24) à force de contact ayant un axe de rotation fictif. Les premières extrémités des ressorts (24) à force de contact sont connectés à des éléments coulissants (22) placés dans des évidements (20) de l'arbre de commutation (6) et poussant contre des cames de commande (32) du pont de contact (10). Les secondes extrémités (30) des ressorts (24) à force de contact sont montées à demeure sur l'arbre de commutation (6) et les éléments coulissants (22) se trouvent en contact constant avec les cames de commande (32).
EP01996905A 2000-11-16 2001-11-02 Dispositif de contact pour disjoncteurs de protection limiteurs de courant Withdrawn EP1334499A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2000156820 DE10056820A1 (de) 2000-11-16 2000-11-16 Kontaktanordnung für strombegrenzende Schutzschalter
DE10056820 2000-11-16
PCT/EP2001/012703 WO2002041439A1 (fr) 2000-11-16 2001-11-02 Dispositif de contact pour disjoncteurs de protection limiteurs de courant

Publications (1)

Publication Number Publication Date
EP1334499A1 true EP1334499A1 (fr) 2003-08-13

Family

ID=7663525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01996905A Withdrawn EP1334499A1 (fr) 2000-11-16 2001-11-02 Dispositif de contact pour disjoncteurs de protection limiteurs de courant

Country Status (3)

Country Link
EP (1) EP1334499A1 (fr)
DE (1) DE10056820A1 (fr)
WO (1) WO2002041439A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10239641B3 (de) * 2002-08-29 2004-02-12 Moeller Gmbh Kontaktsystem für einen Niederspannungsschalter
DE10358828A1 (de) * 2003-12-16 2005-07-14 Moeller Gmbh Elektrodynamisch kippendes Kontaktsystem für Leistungsschalter
US7005594B2 (en) * 2004-04-16 2006-02-28 Ls Industrial Systems Co., Ltd. Movable contactor assembly of circuit breaker
KR100574788B1 (ko) * 2004-10-07 2006-04-27 엘에스산전 주식회사 배선용 차단기의 접촉자 어셈블리
DE102008039187B4 (de) * 2008-08-20 2019-06-19 Siemens Aktiengesellschaft Leistungsschalter, insbesondere für Niederspannungen
DE102008049442B4 (de) * 2008-09-29 2015-02-19 Siemens Aktiengesellschaft Drehkontaktsystem für ein Schaltgerät, insbesondere für ein Leistungsschaltgerät, mit einem radial von innen aufgebrachten schließenden Drehmoment
DE102011003131A1 (de) * 2011-01-25 2012-07-26 Siemens Aktiengesellschaft Elektrischer Schalter
DE102011075729A1 (de) * 2011-05-12 2012-11-15 Siemens Aktiengesellschaft Elektrischer Schalter
CN103606494A (zh) * 2013-11-13 2014-02-26 常熟开关制造有限公司(原常熟开关厂） 一种开关的触头系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688626B1 (fr) * 1992-03-13 1994-05-06 Merlin Gerin Disjoncteur a boitier moule a pont de contacts freine en fin de course de repulsion.
FR2711012B1 (fr) * 1993-10-05 1995-11-24 Merlin Gerin Disjoncteur à chambre d'extinction d'arc perfectionnée.
IT1292453B1 (it) * 1997-07-02 1999-02-08 Aeg Niederspannungstech Gmbh Gruppo rotante di contatti per interrutttori di alta portata

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0241439A1 *

Also Published As

Publication number Publication date
WO2002041439A1 (fr) 2002-05-23
DE10056820A1 (de) 2002-05-23

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