EP2704171A1 - Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur - Google Patents

Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur Download PDF

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Publication number
EP2704171A1
EP2704171A1 EP12182215.9A EP12182215A EP2704171A1 EP 2704171 A1 EP2704171 A1 EP 2704171A1 EP 12182215 A EP12182215 A EP 12182215A EP 2704171 A1 EP2704171 A1 EP 2704171A1
Authority
EP
European Patent Office
Prior art keywords
contact slide
guide element
slide unit
plunger
contact
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Withdrawn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
EP12182215.9A
Other languages
German (de)
English (en)
Inventor
Rainer Kreutzer
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
Priority to EP12182215.9A priority Critical patent/EP2704171A1/fr
Publication of EP2704171A1 publication Critical patent/EP2704171A1/fr
Withdrawn legal-status Critical Current

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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
    • H01H1/2008—Facilitate mounting or replacing contact bridge and pressure spring on carrier
    • 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
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/30—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting within supporting guides
    • 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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H2071/0292—Housing or frames containing grooves or slots for guiding movable parts
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to a contact slide unit for a switching unit, in particular for a circuit breaker, comprising a contact slide and a fixed and a movable contact piece.
  • Switching units serve, among other things, the safe switching off in the event of a short circuit and thus protect consumers and systems. Furthermore, electrical or mechanical switching units are suitable for the operational, manual switching of consumers as well as for the safe separation of a system from the power network during maintenance or changes in the system. Electrical switching units, in particular circuit breakers, are often operated electromagnetically.
  • switching units are high-quality electrical switching devices with integrated protection for motors, lines, transformers and generators. They are used at workstations with a lower switching frequency. Such switching units are suitable in addition to the short circuit protection for overload protection.
  • Known switching units have a contact slide unit with a contact slide and a movable contact piece.
  • the movable contact piece also has electrical contacts.
  • switching units have first contacts to a power line.
  • the electrical contacts of the movable contact piece contact the fixed contacts of the switching unit.
  • the electrical contacts of the movable contact piece are released from the fixed contacts, so that the flow of current is interrupted.
  • the movable contact is released from the fixed contacts.
  • short-circuit shutdowns in a switching unit it may come to the rotation of the movable contact piece about its longitudinal axis after releasing the movable contact piece.
  • the movable contact piece rotates about its longitudinal axis, this is also referred to as a bridge rotator. That is, the movable contact piece then returns after the rotation is no longer in its original position, but remains in the rotated position.
  • Known contact slides of switching units often have two guide systems, an inner and an outer guide system.
  • the outer guide system is used when the switching operation, that is, the switching on or off, via a switching mechanism of the switching unit. This does not create a bridge twister.
  • the inner guide system is used in the event of a short circuit when the switching operation via a switching armature, often a plunger, the switching unit takes place. That is, when switching off due to a short circuit, the movable contact piece along the inner guide system leads the contact slide ahead, bounces on impact surfaces in the so-called lower part of the switching unit and flies back along the inner guide system. In this case, it flies against the switching armature or the plunger of the switching unit. It may happen that the movable contact piece and the plunger meet outside their center lines, so that this can lead to a rotation of the movable contact piece about its longitudinal axis.
  • the object of the present invention is to provide a contact slide unit for a switching unit, in particular for a circuit breaker, which is designed such that bridge rotors of the switching piece are avoided.
  • a contact slide unit for a switching unit in particular for a circuit breaker having a contact slide and a fixed and a movable contact piece.
  • the invention is characterized in that the movable contact piece is arranged on a guide element.
  • the Guide element may preferably be formed as a guide pin or as a metal strip
  • Switching units according to the invention may be electrical switching units, in particular electromagnetically operated switching units or switches, but also mechanical switching units.
  • the electrical switching units include in particular circuit breakers.
  • the movable contact piece is guided over a separate guide element.
  • the guide element is formed axially non-movable in the housing.
  • the movable contact piece is provided with a bore and is also threaded slightly axially movable on the guide element.
  • the plunger may be pronounced in the lower part as a tubular body.
  • a separate tubular body with corresponding contact surfaces which are formed, for example blind-hole-like, is used.
  • the tubular body preferably fits over the guide element and can open the contact bridge by means of its front-side actuating ring surface upon excitation, that is to say in the event of a short circuit.
  • the contact slide for contact opening moves easily over the unactuated plunger.
  • the guide element is mounted axially movable in the housing or in the contact slide.
  • it has a partially enlarged diameter or corresponding embossings for generating an actuating surface.
  • the operated by the short-circuit release plunger in contrast to the first embodiment does not act directly on the contact bridge, but actuates the guide member in the axial direction.
  • the guide element in turn takes over the contact bridge via said actuating surfaces.
  • the actuating surface of the guide element may be formed as a ring, which dips into a corresponding pocket of the contact slide or the bridge. This can be prevented that the element moves uncontrolled with non-energized short-circuit release within the slide in the direction of the plunger and thereby possibly slip down from the housing guide.
  • this housing guide may be formed such that on the housing bottom a housing dome is designed with a recess for the guide element.
  • the guide element is arranged in the contact slide unit.
  • this can be designed such that in the contact slide unit, a guide groove is arranged, in which the guide element supports.
  • the guide element is preferably made of metal, or a thermally resistant plastic or carbon or ceramic. Made of metal guide elements are resistant to the expected temperatures in a tripping operation.
  • Another advantage of the invention may be that the movable contact piece has an opening through which the guide element is guided or penetrates.
  • the other end of the guide element is guided in a tubular body-like extension of a plunger of a short-circuit release, the respective switching state to the contact slide unit transfers.
  • the plunger does not act directly on the movable contact piece, but in the tripping operation, the movable contact piece is separated from the fixed contact piece via the tubular body-like extension.
  • the tubular body-like extension can either be integrally connected to the plunger or the tubular body-like extension and the plunger are made of two parts.
  • the guide element has an enlarged diameter at the end, which serves as an actuating surface on which a plunger of a short-circuit release strikes in the event of tripping.
  • the plunger acts on triggering case on the actuating surface, which then separates the movable contact piece from the fixed contact piece.
  • the actuating surface of the guide element is designed as a ring, which dips into a corresponding recess of the contact slide.
  • the contact slide unit has a contact slide and a fixed and a movable contact piece, which are arranged opposite to each other.
  • a plunger of a short-circuit release is arranged above the contact slide unit.
  • a tubular extension is integrally formed on the end which faces the contact slide, which is either integrally connected to the plunger or is formed as a separate part on the plunger.
  • the movable contact piece has an opening in which the guide element according to the invention is positioned.
  • the guide element is guided above the movable contact piece in the tubular body-like extension of the plunger.
  • the guide element can be guided either in the housing or in the contact slide or in a combination of housing and contact slide. In case of triggering wanders the plunger including the tubular body-like extension in the direction of the movable contact piece, wherein the guide element further migrates into the tubular body-like extension.
  • the guide element above the movable contact piece has an enlarged diameter, which serves as an actuating surface and on which the plunger acts directly when triggered.
  • the guide element has a ring, in which case a recess is formed in the contact slide for the ring and the part of the guide element located above the ring.
  • the plunger strikes in the case of triggering directly on the located above the ring part of the guide element. The plunger pushes the guide element in the housing guide and the ring on the guide element strikes the movable contact piece and solves this fixed fixed contact.
  • the contact slide unit according to the invention avoids bridge twister by using a preferably metal guide element, which can be positioned both on projections on the trigger plunger, as well as housing guides and via guide grooves on the contact slide. As a result, rotations of the contact bridge due to a high momentum are reliably avoided. It is advantageous that the contact bridge has no guide extensions, but can be kept comparatively easy due to a mecanics sacrificees. It was considered that light contact bridges improve the short-circuit turn-off behavior due to their faster accelerability.
  • the guide element itself is preferably made of metal in order to preclude damage due to the high temperatures occurring in the switching chamber and in particular at the contact bridge.
  • Fig. 1 shows a contact slide unit according to the invention, which has a contact slide 1 and a fixed and a movable contact piece (2,3), which are arranged opposite to each other.
  • a plunger 4 of a short-circuit release is arranged above the contact slide unit 1.
  • a tubular body-like extension 5 is formed, which is either integrally connected to the plunger 4 or formed as a separate part on the plunger 4.
  • the movable contact piece 3 has an opening 6 in which the guide element 7 according to the invention is positioned.
  • the guide element 7 is guided above the movable contact piece 3 in the tubular body-like extension 5 of the plunger 4.
  • the guide element 7 may be guided either in the housing 8 or in the contact slide 1 or in a combination of housing 8 and contact slide 1.
  • Fig. 2 is the contact slide unit after Fig. 1 displayed in the event of a trip.
  • the plunger 4 moves including the tubular body-like extension 5 in the direction of the movable contact piece 3, wherein the guide member 7 moves further into the tubular body-like extension 5.
  • Fig. 3 shows a contact slide unit according to the invention of contact slide 1 and a fixed and a movable contact piece 2, 3 with a guide element 7 according to the invention and a plunger 4 with separately molded tubular body extension 5 in normal operation.
  • Fig. 4 shows the embodiment according to Fig. 3 in the case of triggering.
  • the plunger 4 moves including the tubular body-like extension 5 in the case of triggering in the direction of the movable contact piece 3, wherein the guide member 7 moves further into the tubular body-like extension 5.
  • a further embodiment of a plunger 4 is shown with rohr Economicsartigem extension 5, wherein the plunger 4 meets with its larger diameter in the case of triggering on the guide member 7 with a smaller diameter.
  • the required recesses in the tubular body extension 5 are the Fig. 5 trained accordingly.
  • Fig. 6 shows a further embodiment of a plunger 4 with tubular body-like extension 5, wherein the plunger 4 passes from a larger diameter into a smaller diameter and the smaller diameter in the tubular body-like extension 5 is arranged.
  • the plunger 4 meets with the smaller diameter, which is arranged in the tubular body-like extension 5, on the guide element.
  • Fig. 7 shows a further embodiment of a contact slide unit according to the invention with a contact slide 1 and a fixed and a movable contact piece 2, 3 and a guide element 7, which opens after passing through the opening 6 of the movable contact piece 3 in an area with a larger diameter, as the actuating surface. 9 serves.
  • Fig. 7 shows the arrangement in the contact slide unit in normal operation.
  • Fig. 8 is the embodiment after Fig. 7 displayed in the event of a trip.
  • Out Fig. 8 shows that the plunger 4 acts directly on the actuating surface 9 of the guide element 7 in the case of triggering.
  • Fig. 9 shows the embodiment according to Fig. 7 after a flow-dynamic opening with bridge clearance.
  • a contact slide unit according to the invention from a contact slide 1 and a fixed and a movable contact piece 2, 3 is shown with a guide element 7 according to the invention in normal operation, wherein the guide member 7 is additionally guided by a ring 10.
  • a recess 11 is formed in the contact slide 1.
  • the plunger 4 hits in triggering directly on the above the ring 10 located part of the guide element 7. The plunger 4 pushes the guide member 7 in the housing guide and the ring 10 on the guide member 7 strikes the movable contact piece 3 and triggers this from the fixed contact piece 2.
  • Fig. 11 is the embodiment after Fig. 10 displayed in the event of a trip.
  • the plunger 4 meets directly on the located above the ring part of the guide element 7.
  • the plunger 4 pushes the guide member 7 in the housing guide and the ring 10 on the guide member 7 strikes the movable contact 3 and triggers this fixed fixed piece. 2
  • Fig. 12 is the embodiment after Fig. 10 shown at a stromdynamischen opening with bridge freeflow.
  • Fig. 13 goes to the embodiment Fig. 10 in a mechanical open position through a switch lock out.
  • the contact slide unit according to the invention avoids bridge twister by using a preferably metal guide element, which can be positioned both on projections on the trigger plunger, as well as housing guides and via guide grooves on the contact slide. As a result, rotations of the contact bridge due to a high momentum are reliably avoided. It is advantageous that the contact bridge has no guide extensions, but can be kept comparatively easy due to a mecanics trimbruches. It was considered that light contact bridges improve the short-circuit turn-off behavior due to their faster accelerability.
  • the guide element itself is preferably made of metal, to damage by the in the switching chamber and in particular to exclude high temperatures occurring at the contact bridge.

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EP12182215.9A 2012-08-29 2012-08-29 Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur Withdrawn EP2704171A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12182215.9A EP2704171A1 (fr) 2012-08-29 2012-08-29 Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12182215.9A EP2704171A1 (fr) 2012-08-29 2012-08-29 Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur

Publications (1)

Publication Number Publication Date
EP2704171A1 true EP2704171A1 (fr) 2014-03-05

Family

ID=47071101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12182215.9A Withdrawn EP2704171A1 (fr) 2012-08-29 2012-08-29 Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur

Country Status (1)

Country Link
EP (1) EP2704171A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036143A1 (fr) * 2013-09-16 2015-03-19 Siemens Aktiengesellschaft Bloc de coupure, en particulier disjoncteur
WO2015169390A1 (fr) * 2014-05-09 2015-11-12 Siemens Aktiengesellschaft Ensemble curseur de contact pour ensemble de commutation
CN109585189A (zh) * 2014-11-28 2019-04-05 伊顿电气Ip两合公司 开关装置
DE102021104812B3 (de) 2021-03-01 2022-02-17 elobau GmbH & Co.KG Stufenhubtaster

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956135A (en) * 1957-01-18 1960-10-11 Clark Controller Co Hand operated switch
FR2003575A1 (fr) * 1968-03-09 1969-11-07 Stotz Kontakt Gmbh
US6013889A (en) * 1997-06-02 2000-01-11 Allen-Bradley Company, Llc Method for retaining a movable contact in a circuit interrupter
EP1367617A1 (fr) * 2002-05-23 2003-12-03 BITRON S.p.A. Sectionneur de coupure en charge, en particulier pour circuit de charge d'une batterie d'un véhicule à moteur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956135A (en) * 1957-01-18 1960-10-11 Clark Controller Co Hand operated switch
FR2003575A1 (fr) * 1968-03-09 1969-11-07 Stotz Kontakt Gmbh
US6013889A (en) * 1997-06-02 2000-01-11 Allen-Bradley Company, Llc Method for retaining a movable contact in a circuit interrupter
EP1367617A1 (fr) * 2002-05-23 2003-12-03 BITRON S.p.A. Sectionneur de coupure en charge, en particulier pour circuit de charge d'une batterie d'un véhicule à moteur

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036143A1 (fr) * 2013-09-16 2015-03-19 Siemens Aktiengesellschaft Bloc de coupure, en particulier disjoncteur
US9947486B2 (en) 2013-09-16 2018-04-17 Siemens Aktiengesellschaft Switch unit, in particular a circuit breaker
WO2015169390A1 (fr) * 2014-05-09 2015-11-12 Siemens Aktiengesellschaft Ensemble curseur de contact pour ensemble de commutation
CN105900202A (zh) * 2014-05-09 2016-08-24 西门子公司 用于开关单元的接触滑块单元
CN105900202B (zh) * 2014-05-09 2017-09-29 西门子公司 用于开关单元的接触滑块单元
US10109438B2 (en) 2014-05-09 2018-10-23 Siemens Aktiengesellschaft Method and contact slide unit for a switch unit
CN109585189A (zh) * 2014-11-28 2019-04-05 伊顿电气Ip两合公司 开关装置
CN109585189B (zh) * 2014-11-28 2020-05-08 伊顿电气Ip两合公司 开关装置
DE102021104812B3 (de) 2021-03-01 2022-02-17 elobau GmbH & Co.KG Stufenhubtaster

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