EP1897111B1 - Kontaktsystem, insbesondere für ein schaltgerät - Google Patents

Kontaktsystem, insbesondere für ein schaltgerät Download PDF

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Publication number
EP1897111B1
EP1897111B1 EP06763705A EP06763705A EP1897111B1 EP 1897111 B1 EP1897111 B1 EP 1897111B1 EP 06763705 A EP06763705 A EP 06763705A EP 06763705 A EP06763705 A EP 06763705A EP 1897111 B1 EP1897111 B1 EP 1897111B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact point
contact system
hinge shaft
point
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 - Fee Related
Application number
EP06763705A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1897111A1 (de
Inventor
Michael Soukup
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1897111A1 publication Critical patent/EP1897111A1/de
Application granted granted Critical
Publication of EP1897111B1 publication Critical patent/EP1897111B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • H01H1/20—Bridging contacts
    • H01H1/2016—Bridging contacts in which the two contact pairs commutate at substantially different moments
    • 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 system for closing and opening a current path.
  • current path is understood in particular to be a pole path of a single-pole or multi-pole switching and / or protective device, in particular a circuit breaker, for switching a load.
  • Such a contact system usually comprises at least one contact having a moving contact and a fixed contact, which enables a manual closing and opening of a current path via a switching mechanism.
  • the contact system reacts, in particular when used in a circuit breaker, in overcurrent or short circuit with a thermally-magnetically or electronically indicated automatic overcurrent trip, as a result of a power-operated contact opening of the at least one contact point within the current path.
  • high Abschaltrus executed in the opening region of the contact point in the form of so-called extinguishing plates arc quenching chambers.
  • two contact points can be provided in a contact system, the moving contacts are switched synchronously via a contact bridge relative to the associated fixed contacts. So is out of the DE 198 36 549 A1 a translationally displaceable for closing and opening the contact points contact bridge provided with the moving contacts are moved simultaneously in the closed or open position.
  • a contact system with a rotatably moving contact bridge for also simultaneous actuation of the moving contacts of both contact points is from the EP 0 538 149 B1 known.
  • EP 1 109 189 A2 discloses a contact system according to the preamble of claim 1.
  • the invention is based on the object of specifying a particularly suitable contact system with two contact points.
  • a pivotable about a hinge axis contact bridge is provided, wherein the hinge axis is slidably disposed in the opening direction of the contact points along a web guide.
  • the hinge axis is slidably disposed in the opening direction of the contact points along a web guide.
  • first contact point opens while an opposite second contact point is closed.
  • second contact point is closed.
  • the contact bridge is coupled with a switch lock via a shift lever which is displaceable along the web guide.
  • the shift lever engages the bridge side on the hinge axis.
  • the hinge axis can in principle be arranged on the shift lever, while then the expediently designed as a slot-like backdrop, hereinafter also referred to as a guide slot web guide is provided on the contact crutch.
  • the guide slot on the shift lever and the hinge axis are provided on the contact bridge. coupled and.
  • the guide slot forming the web guide has two mutually spaced and - with respect to the opening direction of the contact points - on opposite bearing edges.
  • a first (upper) abutment edge of the web guide constitutes a pressure stop, against which the joint axis rests when the first contact point is closed.
  • a first spring element acts as a compression spring, expediently in the region of the joint axis, on the contact bridge. For operational opening only the first contact point of this spring element then acts as a tension spring.
  • a second (lower) abutment edge of the web guide represents a pull stop on which the hinge axis rests when the first contact point is open. This Buchanschlag is effective in overcurrent or short circuit as a fixed bearing for the hinge axis.
  • the second contact point is always closed during operational opening of the first contact point.
  • a second spring element engages in an expedient embodiment on the second contact point, which acts on the corresponding moving contact in its closed position with a spring force.
  • the force acting in the closing direction of the second contact point spring force is preferably greater than the tensile force of the first spring element.
  • a pivot or pivot bearing is formed at the second contact point.
  • the moving contact of the second contact point has a curved or hemispherical contact surface.
  • the lever arm formed between the hinge axis and the moving contact of the first contact point is longer than the lever arm formed opposite the contact bridge and formed between the hinge axis and the moving contact of the second contact point.
  • the fixed contact of the respective contact point is arranged on a the associated moving contact facing rail leg of a busbar, which is for example U-shaped.
  • a busbar By means of the busbar, in particular due to their shape, a reversal of the current direction within the busbars is effected at at least one contact point, but preferably at both contact points.
  • the force acting on the second contact point spring element is dimensioned such that its spring or restoring force is smaller than the dynamic forces occurring in overcurrent or short circuit.
  • the contact system is particularly suitable for single-pole and multi-pole switching devices used in AC networks or compact circuit breakers with rated currents of, for example, 10 A to 2500 A and high breaking capacities of 20 kA and higher.
  • the opening area of each contact point is assigned a quenching chamber.
  • FIG. 1 shows a switching and / or protective device, such as a modular compact power circuit breaker 1, with a contact system 2 that is coupled via a shift lever 3 with a switching mechanism 4.
  • a switching and / or protective device such as a modular compact power circuit breaker 1
  • a contact system 2 that is coupled via a shift lever 3 with a switching mechanism 4.
  • the contact system 2 for closing and opening a rudimentary only 5 shown in the flow path 5 can be manually operated by means of an actuating lever or a rocker switch in a manner not shown.
  • the circuit breaker 2 further comprises a trip unit 6.
  • the current path 5 leads within the contact system 2 to a busbar 7 of a first contact point K1 and opposite to a further busbar 8 of a second contact point K2.
  • an extinguishing chamber 9 or 10 formed from so-called extinguishing plates is provided in each case.
  • the two busbars 7 and 8 are each U-shaped bent to form one of the respective contact points K1, K2 facing the first rail leg 7a, 8a and one of the respective contact point K1, K2 facing away from the rail leg 7b and 8b U-shaped.
  • the each of the contact point K1, K2 facing rail leg 7a and 8a carries on the outside each have a fixed contact 11a, 12a of the contact point K1 and K2.
  • the contact point K1, K2 respectively assigned moving contact 11b, 12b is held at a respective bridge end 13 and 14 of a contact bridge 15 of the contact system 2.
  • the contact bridge 15 has a hinge axis 16 in the region between the two moving contacts 11b and 12b. This is guided along a web guide 17, which is a slot-like Recess in the shift lever 3 in the region of the contact bridge 15 facing the lever end 18 is introduced.
  • the contact bridge 15 is shown by a solid line in the closed operating case, in which both the first contact point K1 and the second contact point K2 is closed. Shown in dashed lines is the contact bridge 15 on the one hand in the normal operating case with open contact point K1 and closed contact point K2 and on the other hand in case of short circuit with open contact point K1 and K2 open contact point.
  • the shift lever 3 is in different displacement positions along the below also referred to as displacement opening or. Closing direction 19.
  • FIG. 2 engages at the second contact point K2 on this facing lever arm 14 of the contact bridge 15 on the corresponding moving contact 12b facing bridge side running in the embodiment as a compression spring (second) spring element 20 at.
  • Another (first) spring element 21 is fixed with its spring ends on the one hand on the shift lever 3 and on the other hand on the hinge axis 16.
  • This spring element 21 acts in the in FIG. 2 shown closed position P1 of the contact bridge 15 on the connected thereto hinge axis 16 as a compression spring. In this position P1, the articulation axis 16 bears against a contact contour 22, which acts as a pressure stop, of the guide slot 17 forming the web guide.
  • the spring element 21 acts as a tension spring.
  • the hinge axis 16 is located on an abutment or sliding block contour 22 opposite and acting as a train stop system or backdrop contour 23 of the guide slot 17.
  • the contact point K2 forms a rotary or pivot bearing for the contact bridge 15.
  • the moving contact 12b of the second contact point K2 is the moving contact 12b of the second contact point K2 in the region the fixed contact 12a facing contact surface arched or hemispherical curved.
  • FIG. 4 and 5 illustrate the contact opening of both contact points K1 and K2 in the case of short circuit or overcurrent.
  • Such in comparison to the normal operating case many times higher Kur gleichstrom caused due to the U-shaped configuration of the busbars 7 and 8 generated reversal of the current direction - as symbolized by the arrows in the region of the busbars 7, 8 - at the contact points K1 and K2 corresponding dynamic forces F1, F2 in the opening direction 19 of the moving contacts 11b and 12b.
  • the contact point K1 opens, as a result of which the articulation axis 16 abuts against the pull stop 23 along the path guide 17.
  • the second contact point K2 closes automatically as a result of the spring force of the spring element 20 acting as a compression spring.
  • the lever arms H1 or H2 of the contact bridge 15 formed between the first contact point K1 and the articulation axis 16 and between the latter and the second contact point K2 can have different lengths.
  • the lever arm H1 is longer than the lever arm H2.
  • the spring elements 21 and 20 acting on the articulation axis 16 and on the second contact point K2, in conjunction with the contact bridge 15 and their lever arms H1 and H2, represent a lever arm construction for transmitting power.
  • This lever arm system or this lever arm construction initially enables the permanent closed position of one of the contact points K1, K2 in the case of operation on the one hand and the reliable opening of both contact points K1 and K2 in the event of a short circuit.
  • a contact system 2 for implementing a double interruption of the contact points K1, K2 in the event of a short circuit and a single interruption, in particular the first contact points K1, provided in the operating case.
  • Such a contact system 1 is therefore particularly suitable for a compact circuit breaker 1 for switching and overcurrent tripping and thus to protect high-performance system components, eg. B. an engine.
  • a contact system 2 equipped circuit breaker 1 is therefore particularly suitable for connection to other system components within a complex power distribution system.

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  • Breakers (AREA)
EP06763705A 2005-06-20 2006-06-14 Kontaktsystem, insbesondere für ein schaltgerät Expired - Fee Related EP1897111B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005028474A DE102005028474B4 (de) 2005-06-20 2005-06-20 Kontaktsystem, insbesondere für ein Schaltgerät
PCT/EP2006/063201 WO2006136524A1 (de) 2005-06-20 2006-06-14 Kontaktsystem, insbesondere für ein schaltgerät

Publications (2)

Publication Number Publication Date
EP1897111A1 EP1897111A1 (de) 2008-03-12
EP1897111B1 true EP1897111B1 (de) 2009-07-29

Family

ID=36930348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06763705A Expired - Fee Related EP1897111B1 (de) 2005-06-20 2006-06-14 Kontaktsystem, insbesondere für ein schaltgerät

Country Status (5)

Country Link
US (1) US20100108484A1 (xx)
EP (1) EP1897111B1 (xx)
CN (1) CN101194334A (xx)
DE (2) DE102005028474B4 (xx)
WO (1) WO2006136524A1 (xx)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2416332A1 (de) * 2010-08-06 2012-02-08 Eaton Industries GmbH Schaltvorrichtung für ein elektrisches Niederspannungsschaltgerät
CN103077856B (zh) * 2011-10-25 2015-03-04 施耐德电器工业公司 不对称的双触点断路器
DE102012201677A1 (de) * 2012-02-06 2013-08-08 Siemens Aktiengesellschaft Elektrisches Schaltgerät, insbesondere Leistungsschalter
CN105070610A (zh) * 2015-07-11 2015-11-18 合肥正浩机械科技有限公司 电子式断路器机构
CN108565138B (zh) * 2018-06-08 2023-12-12 苏州华之杰电讯股份有限公司 一种开关触头组机构
GB2576338A (en) * 2018-08-15 2020-02-19 Eaton Intelligent Power Ltd Switching device and method for operating a switching device
DE102019126351A1 (de) 2019-09-30 2021-04-01 Tdk Electronics Ag Schaltvorrichtung
DE102020132655A1 (de) * 2020-12-08 2022-06-09 Te Connectivity Germany Gmbh Kontaktbrücke für ein elektrisches Schaltelement und elektrisches Schaltelement

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US2922137A (en) * 1957-03-01 1960-01-19 Gen Electric Recessed double contact strip base
DE1140261B (de) * 1959-11-03 1962-11-29 Siemens Ag Brueckenkontaktanordnung fuer elektrische Schaltgeraete
DE3431288A1 (de) * 1984-08-23 1986-03-06 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer niederspannungs-leistungsschalter mit einem zweiarmigen kontakthebel
US4675481A (en) * 1986-10-09 1987-06-23 General Electric Company Compact electric safety switch
FR2682530B1 (fr) * 1991-10-15 1993-11-26 Merlin Gerin Gamme de disjoncteurs basse tension a boitier moule.
FR2687251B1 (fr) * 1992-02-11 1994-04-29 Telemecanique Structure de coupure pour disjoncteur.
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FR2759489B1 (fr) * 1997-02-12 1999-03-19 Schneider Electric Sa Appareil electrique multipolaire composable
IT1292453B1 (it) * 1997-07-02 1999-02-08 Aeg Niederspannungstech Gmbh Gruppo rotante di contatti per interrutttori di alta portata
DE19836754B4 (de) * 1998-08-13 2006-10-05 Aeg Niederspannungstechnik Gmbh & Co Kg Schaltwelleneinheit für Schalter
DE19856678C2 (de) * 1998-12-04 2002-01-24 Moeller Gmbh Elektrische Schaltvorrichtung
US6310307B1 (en) * 1999-12-17 2001-10-30 General Electric Company Circuit breaker rotary contact arm arrangement
DE10005825C2 (de) * 2000-02-10 2002-01-10 Werner Lampert Elektrischer Niederspannungsschalter
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DE10054383A1 (de) * 2000-10-27 2002-05-08 Siemens Ag Strombegrenzender Niederspannungs-Leistungsschalter
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Also Published As

Publication number Publication date
US20100108484A1 (en) 2010-05-06
EP1897111A1 (de) 2008-03-12
DE102005028474A1 (de) 2006-12-28
DE502006004391D1 (xx) 2009-09-10
WO2006136524A1 (de) 2006-12-28
CN101194334A (zh) 2008-06-04
DE102005028474B4 (de) 2008-04-30

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