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WO2002041345A1 - Systeme de contact pour disjoncteurs limiteurs de courant - Google Patents

Systeme de contact pour disjoncteurs limiteurs de courant Download PDF

Info

Publication number
WO2002041345A1
WO2002041345A1 PCT/EP2001/012702 EP0112702W WO0241345A1 WO 2002041345 A1 WO2002041345 A1 WO 2002041345A1 EP 0112702 W EP0112702 W EP 0112702W WO 0241345 A1 WO0241345 A1 WO 0241345A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
contact bridge
tension spring
arrangement according
bridge
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.)
Ceased
Application number
PCT/EP2001/012702
Other languages
German (de)
English (en)
Inventor
Volker Heins
Franz Boeder
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 WO2002041345A1 publication Critical patent/WO2002041345A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position

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 play-related receptacle of the selector shaft and has opposing contact pieces that cooperate with the fixed contacts in the switched-on position, and two attached inside the selector shaft
  • Tension springs that 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 receptacle for the contact bridge, the other end of each spring being attached to a fastening element of the contact bridge.
  • 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 that the imaginary axis of rotation of the contact bridge can be freely moved 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 ones Degrees of freedom, the contact bridge being held in a position of equilibrium on the longitudinal axis by the self-centering action of the springs.
  • Contact bridge arranged and each have an end mounted on the contact bridge.
  • an opposite end of the springs mentioned is mounted on the ends of a slidingly arranged pin in the cutout of the selector shaft and is designed as a transverse axis, and the contact link has a pair of control cams symmetrical to its axis of rotation on, which are designed so that they cooperate in the end portion of the repulsion stroke of the contact bridge with one of the pins in order to brake the movement of the contact bridge.
  • the pins are slidably supported 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 as well as a continuous tension of the springs corresponding to the pivoting movement of the contact bridge in the direction of the repulsion position, with the energy being stored 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 operating mechanism of the circuit breaker and the opening stroke of the contact bridge is limited, that the rotation of the selector shaft during the opening movement causes the pins to lift off the control cams.
  • the line of action of each spring shifts and thereby shortens the lever arm, as a result of which the restoring force moment exerted by the springs on the contact bridge is reduced.
  • This contact arrangement requires a relatively high number of contact force tension springs - namely two on each side of the contact bridge.
  • the object of the invention is therefore a simplified contact arrangement.
  • the at least one tension spring is hooked with both ends between the two pins, the number of tension springs is halved compared to the prior art, with the permanent contact of the pins on the control cams of the contact bridge for an elastic positioning of the contact bridge in the cutout of the control shaft guaranteed and a fictitious axis of rotation of the contact bridge is defined in relation to the selector shaft.
  • the contact arrangement is expediently to be equipped with two tension springs arranged symmetrically on both sides of the contact bridge or with a single tension spring arranged within a correspondingly provided through opening of the contact bridge.
  • the contact arrangement is suitable for modular, multi-pole contact systems.
  • Figure 1 in longitudinal section an embodiment of the contact arrangement according to the invention in the off position;
  • Figure 2 the contact arrangement of Figure 1 in the on position
  • Figure 3 the contact arrangement of FIG. 1 in the push-off position.
  • the contact arrangement 2 is provided for one pole of a multipole circuit breaker (not shown further).
  • the circuit breaker normally comprises an insulating housing, a switch lock that can be actuated by a drive, supply and output connection elements as well as 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 can be seen.
  • 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 14a and 14b, which cooperate with fixed contacts 16a, 16b in the switched-on position.
  • the two disks of the selector shaft 6 are connected via two first drivers 18a, 18b and two second drivers 20a, 20b.
  • diametrically and rotationally symmetrical recesses 22a and 22b are provided, which run roughly approximately parallel to the longitudinal direction 8 in the switched-off position (FIG. 1) and differ considerably from the direction of the longitudinal direction 8 in the switched-on position (FIG. 2).
  • each elongated recess 22a and 22b is a
  • Transverse axis 4 parallel pin 24a or 24b made of steel slidably mounted.
  • Two contact force tension springs 26, which are arranged on both sides of the contact bridge, are connected to the pins 24a, 24b in such a way that they are each suspended in one of the pins 24a or 24b with one end 28a or 28b.
  • the pins 24a, 24b are pressed against control cams 30a and 30b, respectively, which are formed as rotationally symmetrically opposite outer contours on the contact bridge 10.
  • the course of the cutouts 22a, 22b deviates considerably from the line of action of the tension springs 26.
  • the tension springs 26 transmit a compressive force to the control curves 30a, 30b of the contact bridge 10 via the pins 24a, 24b, and thus the required force
  • a loop-shaped connecting rail 32a and 32b is connected to each of the two fixed contacts 16a and 16b. This loop shape causes the
  • the contact bridge 10 Flow of a short-circuit current, the contact bridge 10 is pushed back against the force of the tension springs 26 from the switch-on position (FIG. 2) in the direction of a repulsion position (FIG. 3) by electrodynamic forces.
  • the pins 24a and 24b slide along a further part of the control cams 30a and 30b, which ends in a locking recess 304a and 304b.
  • 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.
  • the invention can also be developed in such a way that a plurality of contact bridges arranged in parallel within a pole interact via their control cams with the two pins in the manner described above, again requiring at least one contact force tension spring.

Landscapes

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

Abstract

L'invention concerne un système de contact pour des disjoncteurs limiteurs de courant dans le domaine à basse tension, en particulier pour des sectionneurs de puissance limiteurs de courant. L'objectif de l'invention est de simplifier un système de contact (2) dans lequel un pont de contact tournant (10) est suspendu avec un axe de rotation fictif dans un arbre de commande (6) au moyen d'au moins un ressort de traction à force de contact (26). A cet effet, le ressort de traction à force de contact (26) est suspendu par ses deux extrémités (28a ; 28b) par liaison de force entre deux broches (24a ; 24b) qui sont guidées dans des évidements allongés (22a ; 22b) de l'arbre de commande (6) et qui coopèrent avec des cames de commande (30a ; 30b) du pont de contact tournant (10), les deux broches (24a ; 24b) étant en appui permanent avec les cames de commande (30a ; 30b).
PCT/EP2001/012702 2000-11-16 2001-11-02 Systeme de contact pour disjoncteurs limiteurs de courant Ceased WO2002041345A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000156821 DE10056821A1 (de) 2000-11-16 2000-11-16 Kontaktanordnung für strombegrenzende Schutzschalter

Publications (1)

Publication Number Publication Date
WO2002041345A1 true WO2002041345A1 (fr) 2002-05-23

Family

ID=7663526

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/012702 Ceased WO2002041345A1 (fr) 2000-11-16 2001-11-02 Systeme de contact pour disjoncteurs limiteurs de courant

Country Status (2)

Country Link
DE (1) DE10056821A1 (fr)
WO (1) WO2002041345A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2267381A1 (es) * 2004-04-16 2007-03-01 Ls Industrial Systems Co., Ltd Montaje de contactor movible de interruptor de circuito.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10205334C1 (de) * 2002-02-06 2003-11-13 Siemens Ag Elektrische Schaltanordnung mit einem ersten Schaltkontakt und mit einem zweiten Schaltkondakt
DE102006004401B3 (de) * 2006-01-31 2007-04-05 Siemens Ag Kontaktsystem für ein elektrisches Schaltgerät
DE102008007363A1 (de) * 2008-01-30 2009-08-06 Siemens Aktiengesellschaft Drehkontaktsystem für ein Schaltgerät sowie Schaltgeräte mit einem derartigen Drehkontaktsystem
DE102008007365A1 (de) * 2008-01-30 2009-08-06 Siemens Aktiengesellschaft Schaltgerät, insbesondere Leistungsschaltgerät
DE102008039187B4 (de) * 2008-08-20 2019-06-19 Siemens Aktiengesellschaft Leistungsschalter, insbesondere für Niederspannungen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314540A1 (fr) * 1987-10-26 1989-05-03 Merlin Gerin Dispositif de coupure pour un disjoncteur multipolaire à contact rotatif double
EP0560697A1 (fr) * 1992-03-13 1993-09-15 Schneider Electric Sa Disjoncteur à boîtier moulé à pont de contacts freiné en fin de course de répulsion
EP0889498A2 (fr) * 1997-07-02 1999-01-07 AEG Niederspannungstechnik GmbH & Co. KG Dispositif de contact rotatif pour disjoncteur à courant fort

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314540A1 (fr) * 1987-10-26 1989-05-03 Merlin Gerin Dispositif de coupure pour un disjoncteur multipolaire à contact rotatif double
EP0560697A1 (fr) * 1992-03-13 1993-09-15 Schneider Electric Sa Disjoncteur à boîtier moulé à pont de contacts freiné en fin de course de répulsion
EP0889498A2 (fr) * 1997-07-02 1999-01-07 AEG Niederspannungstechnik GmbH & Co. KG Dispositif de contact rotatif pour disjoncteur à courant fort

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2267381A1 (es) * 2004-04-16 2007-03-01 Ls Industrial Systems Co., Ltd Montaje de contactor movible de interruptor de circuito.
ES2267381B1 (es) * 2004-04-16 2008-02-16 Ls Industrial Systems Co., Ltd Montaje de contactor movible de interruptor de circuito.

Also Published As

Publication number Publication date
DE10056821A1 (de) 2002-05-23

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