WO2013139573A1 - Système de contact et appareil de coupure électrique - Google Patents

Système de contact et appareil de coupure électrique Download PDF

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Publication number
WO2013139573A1
WO2013139573A1 PCT/EP2013/054186 EP2013054186W WO2013139573A1 WO 2013139573 A1 WO2013139573 A1 WO 2013139573A1 EP 2013054186 W EP2013054186 W EP 2013054186W WO 2013139573 A1 WO2013139573 A1 WO 2013139573A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
arrangement
finger
contact part
support element
Prior art date
Application number
PCT/EP2013/054186
Other languages
German (de)
English (en)
Inventor
Michael Beck
Andreas Kloos
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2013139573A1 publication Critical patent/WO2013139573A1/fr

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/50Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38Plug-and-socket contacts
    • H01H1/385Contact arrangements for high voltage gas blast circuit breakers

Definitions

  • the invention relates to a contact arrangement for an electrical switching device having a first contact part and a second contact part, wherein the first contact part comprises at least a first contact finger, wherein the first contact finger extending along a longitudinal direction flexible and electrically conductive support member and an comprises a contact surface projecting in the direction of the second contact part and arranged at a free end of the support element, wherein the contact surface bears against the second contact part in an electrically conductive state of the contact arrangement with a contact force generated by means of the support element.
  • the invention further relates to an electrical Wegge ⁇ advises, comprising at least one such contact arrangement.
  • a contact piece for high-voltage switchgear with several, arranged on a circumference substantially parallel to each other, resilient contact fingers is known.
  • the contact fingers each have at least one free end.
  • the contact fingers form parts of a common one-piece cast body.
  • Each contact ⁇ finger is per se rounded by the mold in dielectrically favorable form.
  • the contact fingers connecting cast webs are at least partially removed by machining Bear ⁇ processing.
  • EP 1 068 624 B1 describes an encapsulation component for a gas-insulated switchgear with at least one current path arranged in an encapsulation.
  • a combined isolator / earthing switch a so-called three-position switch, is arranged.
  • a switching element is designed as a cylindrical, in its longitudinal direction. slidable, integrated in the current path contact part with a current rail side contact area and an encapsulation-side contact area formed.
  • the contact part is assigned a grounding contact on the encapsulating housing.
  • the kapse- lung-side contact region of the cylindrical contact part comprises a plurality of spaced manner of a cylinder jacket contact fingers and the associated ground contact is formed assableendes, pin-like contact piece out ⁇ .
  • the invention has for its object to provide a comparison with the prior art improved contact arrangement for an electrical switching device and a switching device with such a contact arrangement.
  • a contact arrangement for an electrical switching device includes a first contact portion and a second contact portion where ⁇ comprises at least a firstmaschinefin ⁇ stirred at the first contact part.
  • the first contact finger includes an extending along a longitudinal direction of flexible and electrically conductive support member and disposed at a free end of the supporting element in the direction of the second contact ⁇ part projecting contact surface, the contact surface produced in an electrically conductive state of the contact arrangement with a means of the support element Contact pressure applied to the second contact part.
  • the first contact finger has, at least in the region of the support element, a bimetallic arrangement which is arranged and designed such that one of a Increasing a temperature of the contact finger resulting bending in the direction of the second contact part takes place.
  • a layer of the bimetallic arrangement facing away from the second contact part expands more strongly when heated in the longitudinal direction than a layer of the bimetallic arrangement facing the second contact part and thus the contact finger in the direction of the second contact part due to a different thermal expansion coefficient, in particular a deviating thermal expansion coefficient performs a closing movement.
  • the contact arrangement according to the invention allows in a particularly advantageous manner that thermal settlement processes of the contact arrangement is counteracted. Especially at high temperatures, a further increase in the temperature of the electrical conductors in the contact arrangement must be avoided in order to reduce the wear behavior of the contact arrangement and thus to increase the service life thereof.
  • the bimetallic unfolds exactly at these high temperatures their greatest effect by an increase in the contact pressure of the contact finger or the contact surface to the second contact part and a resulting reduction of the transition between ⁇ contact state between the contact surface and the second Kon ⁇ tact portion is effected. This in turn is followed by a minimization of the further ⁇ tion warming and an increase in the efficiency of the contact arrangement. This also reduces contact wear and increases contact quality. Furthermore, a higher insensitivity of the contact arrangement is achieved against axial displacement compared to known from the prior art solutions due to the higher contact pressure.
  • the bimetal is non-positive, substance and / or positively be ⁇ solidifies on the support element so that the bimetal is provided in addition to the electrically conductive support member.
  • the bimetallic assembly is attachable to this after a production of the first contact finger.
  • the contact finger can first be produced and, depending on the application, Case of application can be provided with various bimetallic arrangements or continue to be used without bimetallic arrangement.
  • it is not to change erforder ⁇ Lich, existing machines and production arrangements for the production and processing width of the first contact part in a particularly advantageous manner.
  • the bimetallic arrangement forms the support element at least in sections, so that the bimetallic arrangement simultaneously forms the electrical conductor.
  • the bimetal may be formed with little material particularly simple, since only one further additional metal layer is required to Ausbil ⁇ extension of the support element in addition to the actual electrical conductor to form the bimetal.
  • This additional metal layer is depending on the selected Materi ⁇ al arranged on a side facing the second contact portion side of the electric conductor of the support member when the ⁇ se when heated expands less than the electrical conductor, or remote at a second contact portion side, if this warms up more than the electrical conductor.
  • the additional layer does not serve the ⁇ special also for electrical conduction, so that a cross section of the support element and thus of the respective ers ⁇ th contact finger over conventional contact fingers or needs to be increased only insignificantly.
  • the second clock Kon ⁇ finger includes an extending along a longitudinal direction and a flexible support element at a free end of the
  • Support element arranged in the direction of the second contact ⁇ part projecting contact surface. Also in the second contact finger ⁇ the contact surface is in an electrically conductive State of the contact arrangement with a contact pressure generated by means of Stützele ⁇ mentes on the second contact part.
  • This additional arrangement of the second contact finger ⁇ light in a particularly advantageous manner doubling the current carrying capacity of the contact arrangement. Since the second con ⁇ tact finger is disposed between the first contact finger and the second contact part, it results as a further advantage that the second contact finger is pressed with heating by means of the bimetallic arrangement of the first contact finger with a growing contact pressure force on the second contact part.
  • the direction of movement of the bimetallic arrangement may possibly reverse, which at very low temperatures, for example at -55 ° C, to open the electrical connection between the can lead first contact finger and the second contact part.
  • the support member of the second contact finger is formed in an additional embodiment of a single material, d. H. it does not have a bimetallic arrangement. It is thereby achieved that even at low temperatures, a contact closure between the first contact part and the second contact part is ensured.
  • the first contact finger is arranged at a side opposite the free ends of the first contact finger side on a base body.
  • the second contact finger is preferably arranged at a side opposite the free ends of the second contact finger side on a base body.
  • Both main body are non-positively, material and / or positive and electrically lei ⁇ tend interconnected.
  • Such a connection of the first and second contact finger is particularly simple rea ⁇ lisierbar.
  • a large current-carrying contact surface ⁇ between the first and second contact fingers is achieved which is characterized by a low contact resistance from ⁇ .
  • a sum of the length of the body and the length of the support member of the second contact finger in the longitudinal direction smaller than a sum of the length of the body and the length of Stützelemen ⁇ tes the first contact finger. Furthermore, it is thereby possible to optimize an interaction of the first and second contact fingers in all temperature ranges.
  • the contact arrangement provides a further development that the first contact part comprises a plurality of juxtaposed first contact fingers, which are arranged on a side opposite the free ends of the first contact fingers on a common base body.
  • the first contact part comprises a plurality of juxtaposed second contact ⁇ finger, which are arranged on a side opposite the free ends of the second contact fingers on a common base body.
  • first contact fingers or second contact fingers next to one another are understood to mean arrangements of the contact fingers in a flat surface, single or multiple curved surface and / or single or multiple kinked surface. That is, the contact parts can ⁇ any cross section, for example, a straight, single or multiple curved, single or multiple kinked, round, elliptical and / or polygonal cross-section.
  • the first contact part is a hollow cylindrical body and, in the electrically conductive state, surrounds a lateral surface of the second contact part of the contact arrangement concentrically at least in sections.
  • the first contact part with particularly low materi ⁇ al and cost can be produced.
  • the first and second contact fingers and their base body can be produced in a particularly simple manner from hollow cylindrical bodies by the contact fingers are produced by applying cutting and / or non-cutting process in sections of a lateral surface of the hollow cylindrical body.
  • the hollow cylindrical body are particularly easy to produce.
  • the hollow cylindrical body for generating the first contact finger, the associated base body and the bimetal arrangement can be produced as a bimetal cylinder with little effort, for example in an extrusion process.
  • the first contact member is displaceable in the longitudinal direction ⁇ .
  • the second contact part is displaceable in the longitudinal direction.
  • the electrical switching device comprises literallyin- least one contact assembly of the invention or wide Erbil ⁇ compounds of these. It follows that the switching device can be used even at high temperatures and its life is increased. This in turn results in a reduction of maintenance costs and a minimization of downtime of electrical systems in which the switching device is used.
  • the switching device is in particular a
  • ⁇ at the switching device as Encapsulation module for a gas-insulated switchgear ⁇ , as a power switch, as a separating switch or a similar switching device can be formed.
  • FIG. 1 schematically shows a perspective view of a contact arrangement according to the invention
  • FIG. 2 schematically shows a detail of a sectional view of a first contact part of the contact arrangement according to FIG. 1 and FIG. 2
  • FIG. 3 schematically an inventive electrical
  • the contact arrangement 1 comprises a first hollow-cylindrical and crown-shaped contact part 2 and a second cylindri ⁇ cal contact part 3.
  • the contact arrangement 1 is in the electrically conductive
  • first contact part 2 sections of a Man ⁇ telology of the second contact part 3 surrounds.
  • first contact part 2 in the longitudinal ⁇ direction Y is slidably disposed.
  • second contact part 3 is arranged displaceably in the longitudinal direction Y.
  • the shift takes place manually or by means of a drive, not shown.
  • the first contact part 2 comprises a hollow cylindrical
  • Base 4 on which a plurality in the manner of a cylinder jacket juxtaposed firstmaschinefin ⁇ ger 5.1 to 5.n are formed.
  • Each of the first contact fingers 5.1 to 5.n has a respective one along the
  • FIG. 2 schematically shows a detail of a sectional view of the first contact part 2 of the contact arrangement 1.
  • a bimetallic arrangement B forms the support element S1.
  • the first contact fingers 5.1 to 5.n and the base body 4 are formed of two metals with different thermal expansion coefficients, wherein the metals in the illustrated embodiment are materially interconnected.
  • the bimetal B is formed here such that a second contact part 3 facing away from layer of the Bime ⁇ tallanowski elbow B more strongly expands due to the different coefficient of thermal expansion when heated in the longitudinal direction Y than the second contact part 3 facing layer. This results in a bending in the direction of the second contact part 3.
  • the first contact fingers 5.1 to 5.n in the direction of the second Kunststofftei- les 3 when current is applied and resulting temperature increase from a closing movement and increases the contact pressure of the contact surfaces K2 to the second contact part 3 with increasing temperature.
  • a cylinder is first produced.
  • the Er ⁇ generating takes place in an extrusion process, wherein in the extrusion process, the cylinder is already generated as a bimetallic cylinder.
  • the upper regions of the support elements Sl are ge ⁇ shaped such that the contact surfaces Kl arise and are aligned in the radial direction to a longitudinal axis of the bimetallic ⁇ rich.
  • the contact surfaces K1 can be produced by arranging additional components on the support elements S1 or by removal of material in some areas or by area-wise pressing of the support elements S1 . Also, a finished shape of the contact surfaces Kl and the support elements Sl is already possible during the production of the bimetallic cylinder.
  • the first contact fingers 5.1 to 5.n are produced by cutting and / or non-cutting methods by producing elongated material recesses arranged parallel to one another along the longitudinal direction Y.
  • the contact surfaces Kl are generated in particular by beading.
  • the cutting and non-cutting methods include, for example, sawing, milling and cutting methods.
  • required holes are also introduced into the base body 4 and / or the first contact fingers 5.1 to 5.n in cutting and non-cutting methods.
  • first contact part 2 secondmaschinefin ⁇ ger 6.1 to 6.M and at the free ends of the second contact finger 6.1 to 6.M formed base body 7.
  • the body 7 and the second contact fingers 6.1 to 6.M advertising to as the first contact fingers 5.1 to 5.n and the associated base body 4 prepared with the exception that the support elements ⁇ S2 of the second contact fingers are formed 6.1 to 6.m of a single material, and not from a bimetal.
  • the material is, for example, copper or a copper alloy. Also contact surfaces K2 in the same way and
  • the Kunststoffflä ⁇ Chen K2 are in an electrically conductive state of the contact assembly 1 with a contact force generated by means of the support elements S2 on the second contact part 3. At higher temperatures, in addition, the contact force generated by means of the support elements S1 of the first contact fingers 5.1 to 5.n acts on the contact surfaces K2.
  • the second contact fingers 6.1 to 6.m and the associated base body 7 are arranged between the main body 4 with the first contact fingers 5.1 to 5.n arranged thereon and the second contact part 3.
  • the basic body 4 and the first contact finger arranged thereon 5.1 to 5.n surround the base body 7 and the second contact fingers 6.1 to 6.M concentric.
  • Both main body 4 and 7 are electrically connected to each other in a manner not shown by means of one or more dowel pins, screws and / or rivets.
  • the main body 7 on a through hole Dl.
  • the main body 4 has in the illustrated embodiment, a threaded hole D2.
  • a sum of the length of the main body 7 and the length of the support elements S2 of the second contact fingers 6.1 to 6.m in the longitudinal direction Y is smaller than a sum of the length of the base body 4 and the length of the support elements Sl of the first contact fingers 5.1 to 5.n.
  • the arrangement of the second contact fingers 6.1 to 6.m allows the use of the contact arrangement 1 even at very low temperatures. Under certain circumstances, the direction of movement of the bimetallic arrangement B can reverse at very low temperatures and lead to the opening of the electrical connection between the first contact fingers 5.1 to 5.n and the second contact part 3. By means of the second contact fingers 6.1 to 6.m it is avoided that the electrical connection between the first contact part 2 and the second contact part 3 is interrupted.
  • the illustrated selective electrical and me ⁇ chanical connection of the base body 4 and 7 allows the described effect of increasing the contact pressure at stei ⁇ gender temperature on the second contact fingers 6.1 to 6.m on the one hand and on the other hand, that at very low temperatures reversal of the direction of movement the bimetallic arrangement B has no mechanical influence on the second contact fingers 6.1 to 6.m.
  • the coating is formed, for example, from silver or silver alloys.
  • FIG. 3 shows schematically an inventive electrical switching device 8 is shown, which the contact assembly 1 um- summarizes.
  • the switching device 8 is intended for high-voltage and high ⁇ current applications and designed as encapsulation component for a gas-insulated switchgear, as a circuit breaker or disconnector.
  • the switching device 8 is a so-called three-position switch, as it is known for example from EP 1 068 624 Bl.
  • crown-like, self-shielding finger contact pieces are replaced by the first contact part 2 according to Figures 1 and 2 described above.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Contacts (AREA)

Abstract

L'invention concerne un système de contact (1), destiné à un appareil de coupure électrique (8), comprenant une première partie de contact (2) et une deuxième partie de contact (3). La première partie de contact (2) comprend au moins un premier doigt de contact (5.1 à 5.n). Ce premier doigt de contact (5.1 à 5.n) comprend un élément d'appui (S1) flexible et électriquement conducteur qui s'étend dans une direction longitudinale (Y), et une surface de contact (K1) disposée à une extrémité libre de l'élément d'appui (S1) et dépassant en direction de la deuxième partie de contact (3). Dans un état électriquement conducteur du système de contact (1), la surface de contact (K1) est en appui sur la deuxième partie de contact (3) sous l'effet d'une force de pression exercée par l'élément d'appui (S1). Selon l'invention, le premier doigt de contact (5.1 à 5.n) présente au moins dans la zone de l'élément d'appui (S1) un ensemble bimétallique (B) disposé et configuré de telle sorte qu'une élévation de la température du premier doigt de contact (5.1 à 5.n) provoque une déformation en direction de la deuxième partie de contact (3). L'invention concerne en outre un appareil de coupure électrique comprenant au moins un tel système de contact.
PCT/EP2013/054186 2012-03-20 2013-03-01 Système de contact et appareil de coupure électrique WO2013139573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012204371.3 2012-03-20
DE102012204371A DE102012204371A1 (de) 2012-03-20 2012-03-20 Kontaktanordnung und elektrisches Schaltgerät

Publications (1)

Publication Number Publication Date
WO2013139573A1 true WO2013139573A1 (fr) 2013-09-26

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Application Number Title Priority Date Filing Date
PCT/EP2013/054186 WO2013139573A1 (fr) 2012-03-20 2013-03-01 Système de contact et appareil de coupure électrique

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DE (1) DE102012204371A1 (fr)
WO (1) WO2013139573A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112509851A (zh) * 2020-12-02 2021-03-16 特变电工云集高压开关有限公司 一种带屏蔽功能的自力型电联接元件

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018122630A1 (fr) * 2016-12-29 2018-07-05 Abb Schweiz Ag Bloc de contact d'appareillage de connexion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818058C (de) * 1949-01-01 1951-10-22 Fritz Zech Aus Thermo-Bimetall bestehende Einrichtung zur Erhoehung des Kontaktdruckes bei elektrischen Kontakten
DE19612995C1 (de) 1996-03-22 1997-10-02 Siemens Ag Kontaktstück und Verfahren zur Herstellung eines Kontaktstückes
WO1999052119A1 (fr) * 1998-04-03 1999-10-14 Siemens Aktiengesellschaft Module d'encapsulage dote d'un commutateur a trois positions integre dans un circuit electrique et destine a un equipement electrique isole par un gaz
EP1926112A1 (fr) * 2006-11-23 2008-05-28 ABB Technology AG Système de contact électrique pour un appareil de coupure électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1640239U (de) * 1952-02-01 1952-06-26 Felten & Guilleaume Carlswerk Federkontakte, insbesondere an sicherungsunterteilen fuer hochleistungssicherungen.
DE19648633A1 (de) * 1996-11-25 1998-05-28 Asea Brown Boveri Elektrisches Schaltgerät
DE19857169A1 (de) * 1998-12-11 2000-06-15 Abb Patent Gmbh Kontaktanordnung für ein elektrisches Schaltgerät
DE102007062357B4 (de) * 2007-12-22 2010-03-18 Preh Gmbh Leistungsschalter mit einem über eine Kontaktbahn beweglichen Schleifkontakt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818058C (de) * 1949-01-01 1951-10-22 Fritz Zech Aus Thermo-Bimetall bestehende Einrichtung zur Erhoehung des Kontaktdruckes bei elektrischen Kontakten
DE19612995C1 (de) 1996-03-22 1997-10-02 Siemens Ag Kontaktstück und Verfahren zur Herstellung eines Kontaktstückes
WO1999052119A1 (fr) * 1998-04-03 1999-10-14 Siemens Aktiengesellschaft Module d'encapsulage dote d'un commutateur a trois positions integre dans un circuit electrique et destine a un equipement electrique isole par un gaz
EP1068624B1 (fr) 1998-04-03 2002-01-02 Siemens Aktiengesellschaft Module d'encapsulage dote d'un commutateur a trois positions integre dans un circuit electrique et destine a un equipement electrique isole par un gaz
EP1926112A1 (fr) * 2006-11-23 2008-05-28 ABB Technology AG Système de contact électrique pour un appareil de coupure électrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112509851A (zh) * 2020-12-02 2021-03-16 特变电工云集高压开关有限公司 一种带屏蔽功能的自力型电联接元件

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Publication number Publication date
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