EP1288990A2 - Dispositif de contact de commutation avec force élastique agissant dans la direction de fermeture et la direction d' ouverture - Google Patents

Dispositif de contact de commutation avec force élastique agissant dans la direction de fermeture et la direction d' ouverture Download PDF

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Publication number
EP1288990A2
EP1288990A2 EP02090306A EP02090306A EP1288990A2 EP 1288990 A2 EP1288990 A2 EP 1288990A2 EP 02090306 A EP02090306 A EP 02090306A EP 02090306 A EP02090306 A EP 02090306A EP 1288990 A2 EP1288990 A2 EP 1288990A2
Authority
EP
European Patent Office
Prior art keywords
contact
spring
lever
contact lever
springs
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Withdrawn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
EP02090306A
Other languages
German (de)
English (en)
Other versions
EP1288990A3 (fr
Inventor
Michael Bach
Detlev Schmidt
Michael Sebekow
Guenter Seidler-Stahl
Ingo Thiede
Sezai Tuerkmen
Artur Wajnberg
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1288990A2 publication Critical patent/EP1288990A2/fr
Publication of EP1288990A3 publication Critical patent/EP1288990A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable

Definitions

  • the invention relates to a switch contact arrangement with a fixed switch contact and with a cooperating with it Contact lever on a pivoted Contact carrier is arranged movably, between which Contact lever and the contact carrier acts a spring force that the contact lever on the one hand in a dead center position Closing direction and on the other hand the dead center position in Direction of opening applied.
  • a switch contact arrangement of this type is through the US 4,845,459 became known. It has the property that the contact lever jumps from the closed position can be transferred to the open position without it this requires actuation of the contact carrier. Therefore suitable a contact arrangement of the present type in particular for current limiting circuit breakers where one Contact opening as quickly as possible is desirable if a very high current, especially a short-circuit current, occurs.
  • the invention is based on the object the switching contact arrangement mentioned at the beginning with a spring force, that both in the closing direction and in the opening direction acts to improve in such a way that an inevitable indifferent area is as small as possible, d. H. itself over a smaller swivel angle of the contact lever extends than before.
  • this object is achieved in that to apply the spring force two on opposite Springs arranged on the sides of the contact lever are provided, such that one of the springs (hold-open spring) in the sense the opening and the other spring (contact force spring) in the sense the closing of the contact lever works.
  • the effective Lever arm of the two springs with respect to a pivot bearing of the Contact lever on the contact carrier in the end positions of the contact lever has approximately the value zero in such a way that the im Sense of the opening of the contact lever acting spring in the Closed position of the contact lever and in the sense of Closing spring in the open position of the contact lever is essentially ineffective. In this way the two springs come into effect individually.
  • both springs are designed as helical compression springs, which are arranged on the one hand on the contact carrier Abutment and on the other hand on a boom of the contact lever with one depending on the pivoting of the contact lever support variable effective lever arm.
  • FIG. 1 shows a schematic representation of a current-limiting switch contact arrangement of a low-voltage circuit breaker in the closed position.
  • FIG. 2 shows a representation corresponding to FIG. 1 the switching contact arrangement with the contact lever open and unchanged position of the contact carrier with respect to FIG. 1.
  • Figure 3 shows the switch contact arrangement in the open Position, as in the normal operation of the switch contact arrangement is effected by a drive.
  • the known assemblies of a switch contact arrangement are in 1 simplified, but in an actual Conditions in a low-voltage circuit breaker, for example corresponding positions are shown. Accordingly an upper connecting rail 1 and a lower one extend Connection rail 2 parallel to each other and protrude from one Dashed housing 3 of a circuit breaker out.
  • the upper connecting rail 1 carries a fixed one Switch contact 4, with which a movable contact lever 5 interacts. This can be moved around a pivot bearing 6, that on a turn mounted contact carrier 7 is arranged.
  • the pivot bearing 8 of the contact carrier 7 is located in a known manner near the inside End of the lower connecting bar 2. Also in a known one Way extends between the end of the contact lever 5 and the lower connecting bar 2 a flexible conductor 10, which completes the circuit of the circuit breaker.
  • the contact lever 5 has between its contact End and its pivot bearing 6 arranged boom 14 and 15, which are on opposite sides of the contact lever 5 extend. Two springs engage on these arms 14 and 15 16 or 17 on, which thus also on opposite Sides of the contact lever 5.
  • the outrigger 14 and 15 opposite ends of the springs 16 and 17 are supported on abutments 18 and 20 on the contact carrier 7 are arranged.
  • the springs 16 and 17 are as Helical compression springs are designed and are shown below according to their function as open spring 16 or as Contact force spring 17 designated.
  • FIG. 1 the closed state of the switch contact arrangement shows.
  • the design of the boom 14 and the arrangement of the abutment 18 achieved that the force of the open spring 16 on the pivot bearing 6 of the Contact lever 5 is directed and thus the effective lever arm b has the value zero.
  • the open spring has in this position 16 no effect on the contact lever 5.
  • the dimensioning of the boom 15 and the abutment 20 such an alignment of the contact force spring 17 achieves that an effective lever arm a with respect of the pivot bearing 6 occurs.
  • the properties of the contact force spring 17 in conjunction with lever arm a thus the between the contact lever 5 and the fixed Switch contact 4 occurring contact force.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP02090306A 2001-09-03 2002-08-28 Dispositif de contact de commutation avec force élastique agissant dans la direction de fermeture et la direction d' ouverture Withdrawn EP1288990A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10144105 2001-09-03
DE2001144105 DE10144105C1 (de) 2001-09-03 2001-09-03 Schaltkontaktanordnung mit einer in Schließrichtung und in Öffnungsrichtung wirkenden Federkraft

Publications (2)

Publication Number Publication Date
EP1288990A2 true EP1288990A2 (fr) 2003-03-05
EP1288990A3 EP1288990A3 (fr) 2005-01-26

Family

ID=7698202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090306A Withdrawn EP1288990A3 (fr) 2001-09-03 2002-08-28 Dispositif de contact de commutation avec force élastique agissant dans la direction de fermeture et la direction d' ouverture

Country Status (2)

Country Link
EP (1) EP1288990A3 (fr)
DE (1) DE10144105C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013144686A1 (fr) * 2012-03-28 2013-10-03 Larsen & Toubro Limited Système de contact amélioré à double coupure pour coupe-circuits à boîtier moulé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046640B4 (de) * 2005-09-29 2007-10-18 Abb Patent Gmbh Elektrisches Installationsgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284511B (de) * 1962-03-16 1968-12-05 Licentia Gmbh Fuer vorzugsweise hoehere Stromstaerken geeigneter, verklinkter Selbstschalter
JPS58192232A (ja) * 1982-04-30 1983-11-09 松下電工株式会社 電磁反発接触子装置
DE3732468A1 (de) * 1987-09-23 1989-04-06 Siemens Ag Kontaktanordnung eines niederspannungs-leistungsschalters mit elektrodynamischer oeffnung
DE19925537C2 (de) * 1999-06-04 2002-01-03 Felten & Guilleaume Ag Sprungantrieb für elektrische Schaltgeräte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013144686A1 (fr) * 2012-03-28 2013-10-03 Larsen & Toubro Limited Système de contact amélioré à double coupure pour coupe-circuits à boîtier moulé
US9508495B2 (en) 2012-03-28 2016-11-29 Larsen & Tourbo Limited Double break contact system for moulded case circuit breakers

Also Published As

Publication number Publication date
DE10144105C1 (de) 2003-04-17
EP1288990A3 (fr) 2005-01-26

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