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EP1095389A1 - Current contact system for a current switch - Google Patents

Current contact system for a current switch

Info

Publication number
EP1095389A1
EP1095389A1 EP99926225A EP99926225A EP1095389A1 EP 1095389 A1 EP1095389 A1 EP 1095389A1 EP 99926225 A EP99926225 A EP 99926225A EP 99926225 A EP99926225 A EP 99926225A EP 1095389 A1 EP1095389 A1 EP 1095389A1
Authority
EP
European Patent Office
Prior art keywords
current
contact
conductor loop
switch
current conductor
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.)
Granted
Application number
EP99926225A
Other languages
German (de)
French (fr)
Other versions
EP1095389B1 (en
Inventor
Lutz Niemeyer
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP1095389A1 publication Critical patent/EP1095389A1/en
Application granted granted Critical
Publication of EP1095389B1 publication Critical patent/EP1095389B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts

Definitions

  • the invention is based on current contact arrangements of a current switch according to the preamble of patent claim 1.
  • the invention relates to a prior art, as is known from DE 2925162 C2.
  • a high-voltage switch is described with a movable contact between an inner and outer fixed contact.
  • a contact finger with a contact loop is inserted, which presses against a contact ring of the movable contact piece of the current switch in its closed state by means of a leaf spring.
  • a loop contact is arranged on the movable contact piece, which presses against the inner contact piece when the current switch is closed and opens when the current switch is opened after the contact finger has been opened.
  • the invention solves the problem of further developing current contact arrangements of a current switch of the type mentioned at the outset in such a way that the current switch can be produced more easily and more cost-effectively.
  • An advantage of the invention is that no additional power current path is required in addition to the nominal current path.
  • the arc length can be increased with simple means and thus the commutation voltage increased, the switch-off behavior improved and the erosion of the current contacts reduced.
  • Fig. 1 in a section a cross section of the upper
  • FIG. 2 Current switch in the closed position and FIG. 2 current contact arrangements according to FIG. 1 in the open
  • Fig. 1 shows a section of a sectional view of a circular cylindrical rated current contact arrangement of a circuit breaker or current switch in the closed state, with (1) the longitudinal axis is designated.
  • a tubular, movable 1st current contact arrangement (K1) and a tubular, fixed 2nd current contact arrangement (K2) have switching contacts (P4) or (Pl) at the end, which can be produced inexpensively by welding profile rings.
  • a U-shaped arcing horn (R1) made of an electrically highly conductive material is also arranged at the end of the first current contact arrangement (K1) and an arcing horn or a U-shaped current conductor loop (R2) at the end of the 2nd current contact arrangement (K2) to opposite switching contacts (P2) and (P3) consists of a bimetal.
  • the inner part of the bimetal consists of a material with a high elastic constant, preferably of steel (2), and the outer part of an electrically highly conductive material, preferably of copper (3) or a copper alloy.
  • the steel component of the current loop (R2) ensures its high radial elasticity; it is shaped so that the current conductor loop (R2) relaxes after a contact separation in the form shown in FIG. 2.
  • the current conductor loop (R2) can follow it be sawn on the inside in the radial direction.
  • the copper component of the bimetal ensures high electrical conductivity.
  • the switching contacts (Pl) - (P4) which lie one above the other in the closed state of the current switch and are pressed by an elastic deformation of the first and second current contact arrangements (Kl, K2), are subjected to different levels of stress by arcing. A silver coating is sufficient for the little stressed switching contacts (Pl) and (P2), while the switching contacts (P3) and (P4) have a coating made of a consumable material.
  • the current conductor loop (R2) has a contact end or an arcing horn (3 ') made of copper at the end behind the switch contacts (Pl) and (P2).
  • a dashed line (4) through the 1st current contact arrangement (Kl), the switch contacts (Pl) - (P4) and the 2nd current contact arrangement (K2) indicates a symmetrical current path.
  • FIG. 2 shows current contact arrangements of the current switch according to FIG. 1 in the open state, the first current contact arrangement (K1) being shifted to the right in the direction of an arrow (5).
  • the contact pairs (Pl, P2) are first separated, as a result of which the current commutates into the current conductor loop (R2), as shown in broken lines.
  • the contact pair (P3, P4) also disconnects, so that an arc ( ⁇ ) is created, which is driven by the asymmetrical current flow in the current loop (R2) onto the arcing horns (3 *, R1) becomes.
  • the arc is thus quickly driven away from the original contact point and is increasingly magnetically blown asymmetrically, so that its operating voltage increases rapidly.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Contacts (AREA)

Abstract

According to the invention, a mobile first current contact system (K1) at its end has a switching contact (P4) and a U-shaped arcing horn (R1). A fixed second current contact system (K2) at its end has a switching contact (P1) and a U-shaped current conductor loop (R2). Said current conductor loop (R2) in its U-shaped part consists of a bimetallic strip made of steel (2) on the inside and copper (3) on the outside; contiguous thereto the invention provides for two opposite switching contacts (P2, P3) and, at the end side, an arcing horn (3'). When the current switch is closed the first current contact system (K1) is shifted to the left against the direction of an arrow (5) so that all four switching contacts (P1-P4) are situated on top of each other in pressure contact. When the current switch is opened the contact pairs (P1, P2) are separated, so that a current (4) is switched from them into the current conductor loop (R2) (see hatched line in the figure). After normalization of the current conductor loop (R2) the contact pair (P3, P4) is also separated so that an electric arc (6) is created which by the asymmetric current conduction in the current conductor loop (R2) is driven onto the arcing horns (3', R1). In this way the electric arc is rapidly driven away from its original point of contact and increasingly exposed to a magnetic field in an asymmetric manner so that its operating voltage rises rapidly. This contact system is easy and economical to produce and ensures reduced contact erosion.

Description

BESCHREIBUNG DESCRIPTION
Stromkontaktanordnungen eines StromschaltersCurrent contact arrangements of a current switch
TECHNISCHES GEBIETTECHNICAL AREA
Bei der Erfindung wird ausgegangen von Stromkontaktanordnungen eines Stromschalters nach dem Oberbegriff des Patentanspruchs 1.The invention is based on current contact arrangements of a current switch according to the preamble of patent claim 1.
STAND DER TECHNIKSTATE OF THE ART
Mit dem Oberbegriff des Patentanspruchs 1 nimmt die Erfindung auf einen Stand der Technik Bezug, wie er aus der DE 2925162 C2 bekannt ist. Dort ist ein Hochspannungsschalter mit einem beweglichen Schaltstück zwischen einem inneren und äußeren feststehenden Schaltstück beschrieben. In das äußere Schaltstück ist ein Kontaktfinger mit einer Kontaktschleife eingesetzt, welche durch eine Blattfeder gegen einen Kontaktring des beweglichen Schaltstückes des Stromschalters in dessen Schließzustand drückt. Am beweglichen Schaltstück ist ein Schiingenkontakt angeordnet, welcher im Schließzustand des Stromschalters gegen das innere Schaltstück drückt und beim Öffnen des Stromschalters zeitlich nach dem Öffnen des Kontaktfingers öffnet. Beim Ausschaltvorgang wird zwischen den Nennstromkontakten in kürzester Zeit eine vergleichsweise große Spannung aufgebaut, welche den abzuschaltenden Strom äußerst rasch vom Nennstrompfad in einen Leistungspfad treibt. Der Lichtbogen, der beim Öffnen des Kontaktfingerkontaktes entsteht, wird durch das magnetische Feld von dessen Schlinge beblasen; er erlischt schnell, weil zunächst noch ein alternativer Strompfad zwischen dem beweglichen und dem inneren feststehenden Schaltstück besteht. Der Aufbau eines derartigen Nennstromkontaktsystems mit vielen Kontaktfingern und dazugehörigen Halterungen und Andruckfedern ist relativ aufwendig und teuer.With the preamble of claim 1, the invention relates to a prior art, as is known from DE 2925162 C2. There, a high-voltage switch is described with a movable contact between an inner and outer fixed contact. In the outer contact piece, a contact finger with a contact loop is inserted, which presses against a contact ring of the movable contact piece of the current switch in its closed state by means of a leaf spring. A loop contact is arranged on the movable contact piece, which presses against the inner contact piece when the current switch is closed and opens when the current switch is opened after the contact finger has been opened. During the switch-off process, a comparatively large voltage is built up between the nominal current contacts in a very short time, which drives the current to be switched off extremely quickly from the nominal current path into a power path. The arc, which arises when the contact finger contact is opened, is blown by the loop's magnetic field; it goes out quickly because there is still an alternative current path between the movable and the inner fixed contact. The construction of such a nominal current contact system with many contact fingers and associated brackets and pressure springs is relatively complex and expensive.
DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION
Die Erfindung, wie sie im Patentanspruch 1 definiert ist, löst die Aufgabe, Stromkontaktanordnungen eines Stromschalters der eingangs genannten Art derart weiterzuentwickeln, daß der Stromschalter einfacher und kostengünstiger herstellbar ist.The invention, as defined in claim 1, solves the problem of further developing current contact arrangements of a current switch of the type mentioned at the outset in such a way that the current switch can be produced more easily and more cost-effectively.
Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Patentansprüchen definiert.Advantageous embodiments of the invention are defined in the dependent claims.
Ein Vorteil der Erfindung besteht darin, daß zu dem Nennstrompfad kein zusätzlicher Leistungsstrompfad erforderlich ist.An advantage of the invention is that no additional power current path is required in addition to the nominal current path.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung kann die Lichtbogenlänge mit einfachen Mitteln vergrößert und damit die KommutationsSpannung erhöht, das Abschaltverhalten verbessert und der Abbrand der Stromkontakte verringert werden.According to an advantageous embodiment of the invention, the arc length can be increased with simple means and thus the commutation voltage increased, the switch-off behavior improved and the erosion of the current contacts reduced.
KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS
Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels erläutert. Es zeigen:The invention is explained below using an exemplary embodiment. Show it:
Fig. 1 in einem Ausschnitt einen Querschnitt der oberenFig. 1 in a section a cross section of the upper
Hälfte von Stromkontaktanordnungen einesHalf of current contact arrangements one
Stromschalters in Schließstellung und Fig. 2 Stromkontaktanordnungen gemäß Fig. 1 in geöffnetemCurrent switch in the closed position and FIG. 2 current contact arrangements according to FIG. 1 in the open
Schaltzustand. Zum Verständnis der Erfindung nicht notwendigeSwitching state. Not necessary to understand the invention
Konstruktionselemente sowie das Gehäuse des Stromschalters sind in den Zeichnungen weggelassen worden. Der Übersichtlichkeit wegen einstückig dargestellte Teile können in der Praxis aus konstruktiven und fertigungstechnischen Gründen aus mehreren Teilen zusammengesetzt sein.Structural elements and the housing of the power switch have been omitted from the drawings. For the sake of clarity, parts shown in one piece can, in practice, be composed of several parts for design and manufacturing reasons.
WEGE ZUR AUSFUHRUNG DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION
In den Figuren sind gleiche Teile mit gleichen Bezugszeichen gekennzeichnet .In the figures, the same parts are identified by the same reference numerals.
Fig. 1 zeigt in einem Ausschnitt eine Schnittdarstellung einer kreiszylindrischen Nennstrom-Kontaktanordnung eines Leistungsschalters bzw. Stromschalters im Schließzustand, wobei mit (1) dessen Längsachse bezeichnet ist. Eine rohrförmige, bewegliche 1. Stromkontaktanordnung (Kl) und eine rohrförmige, feststehende 2. Stromkontaktanordnung (K2) weisen endseitig Schaltkontakte (P4) bzw. (Pl) auf, die kostengünstig durch Anschweißen von Profilringen herstellbar sind. An der 1. Stromkontaktanordnung (Kl) ist endseitig ferner ein U-förmiges Lichtbogenhorn (Rl) aus einem elektrisch gutleitenden Werkstoff angeordnet und an der 2. Stromkontaktanordnung (K2) endseitig ein Lichtbogenhorn bzw. eine U-förmige Stromleiterschleife (R2), die bis zu einander gegenüberliegenden Schaltkontakten (P2) und (P3) aus einem Bimetall besteht. Der innenliegende Teil des Bimetalls besteht aus einem Material mit einer hohen Elastizitätskonstante, vorzugsweise aus Stahl (2), und der außenliegende aus einem elektrisch gutleitenden Material, vorzugsweise aus Kupfer (3) oder einer Kupferlegierung. Die Stahlkomponente der Stromleiterschleife (R2) gewährleistet deren hohe radiale Elastizität; sie ist so geformt, daß sich die Stromleiterschleife (R2) nach einer Kontakttrennung in die in Fig. 2 gezeigte Form entspannt. Zur Verbesserung dieser Elastizität kann die Stromleiterschleife (R2) auf ihrer nach innen gebogenen Seite in radialer Richtung eingesägt sein. Die Kupferkomponente des Bimetalls gewährleistet eine hohe elektrische Leitfähigkeit. Die im Schließzustand des Stromschalters übereinanderliegenden und durch eine elastische Deformation der 1. und 2. Stromkontaktanordnungen (Kl, K2) angedrückten Schaltkontakte (Pl) - (P4) sind durch Lichtbögen unterschiedlich stark beansprucht. Für die wenig beanspruchten Schaltkontakte (Pl) und (P2) genügt ein Silberüberzug, während die Schaltkontakte (P3) und (P4) eine Auflage aus einem Abbrandmaterial aufweisen. Die Stromleiterschleife (R2) weist endseitig hinter den Schaltkontakten (Pl) und (P2) ein lichtbogenseitig abgewinkeltes Kontaktende bzw. Lichtbogenhorn (3') aus Kupfer auf. Eine gestrichelte Linie (4) durch die 1. Stromkontaktanordnung (Kl) , die Schaltkontakte (Pl) - (P4) und die 2. Stromkontaktanordnung (K2) deutet einen symmetrischen Strompfad an.Fig. 1 shows a section of a sectional view of a circular cylindrical rated current contact arrangement of a circuit breaker or current switch in the closed state, with (1) the longitudinal axis is designated. A tubular, movable 1st current contact arrangement (K1) and a tubular, fixed 2nd current contact arrangement (K2) have switching contacts (P4) or (Pl) at the end, which can be produced inexpensively by welding profile rings. A U-shaped arcing horn (R1) made of an electrically highly conductive material is also arranged at the end of the first current contact arrangement (K1) and an arcing horn or a U-shaped current conductor loop (R2) at the end of the 2nd current contact arrangement (K2) to opposite switching contacts (P2) and (P3) consists of a bimetal. The inner part of the bimetal consists of a material with a high elastic constant, preferably of steel (2), and the outer part of an electrically highly conductive material, preferably of copper (3) or a copper alloy. The steel component of the current loop (R2) ensures its high radial elasticity; it is shaped so that the current conductor loop (R2) relaxes after a contact separation in the form shown in FIG. 2. To improve this elasticity, the current conductor loop (R2) can follow it be sawn on the inside in the radial direction. The copper component of the bimetal ensures high electrical conductivity. The switching contacts (Pl) - (P4), which lie one above the other in the closed state of the current switch and are pressed by an elastic deformation of the first and second current contact arrangements (Kl, K2), are subjected to different levels of stress by arcing. A silver coating is sufficient for the little stressed switching contacts (Pl) and (P2), while the switching contacts (P3) and (P4) have a coating made of a consumable material. The current conductor loop (R2) has a contact end or an arcing horn (3 ') made of copper at the end behind the switch contacts (Pl) and (P2). A dashed line (4) through the 1st current contact arrangement (Kl), the switch contacts (Pl) - (P4) and the 2nd current contact arrangement (K2) indicates a symmetrical current path.
Fig. 2 zeigt Stromkontaktanordnungen des Stromschalters gemäß Fig. 1 im Öffnungszustand, wobei die 1. Stromkontaktanordnung (Kl) in Richtung eines Pfeiles (5) nach rechts verschoben ist. Beim Öffnen werden zunächst die Kontaktpaare (Pl, P2) getrennt, wodurch der Strom in die Stromleiterschleife (R2) kommutiert, wie es gestrichelt eingezeichnet ist. Nachdem sich die Stromleiterschleife (R2) entspannt hat, trennt auch das Kontaktpaar (P3, P4) , so daß ein Lichtbogen (β) entsteht, der durch die asymmetrische Stromführung in der Stromleiterschleife (R2) auf die Lichtbogenhörner (3*, Rl) getrieben wird. Damit wird der Lichtbogen schnell von der ursprünglichen Kontaktstelle weggetrieben und dabei zunehmend asymmetrisch magnetisch beblasen, so daß seine Brennspannung schnell zunimmt. BEZEICHNUNGSLISTEFIG. 2 shows current contact arrangements of the current switch according to FIG. 1 in the open state, the first current contact arrangement (K1) being shifted to the right in the direction of an arrow (5). When opening, the contact pairs (Pl, P2) are first separated, as a result of which the current commutates into the current conductor loop (R2), as shown in broken lines. After the current loop (R2) has relaxed, the contact pair (P3, P4) also disconnects, so that an arc (β) is created, which is driven by the asymmetrical current flow in the current loop (R2) onto the arcing horns (3 *, R1) becomes. The arc is thus quickly driven away from the original contact point and is increasingly magnetically blown asymmetrically, so that its operating voltage increases rapidly. LIST OF DESIGNATIONS
1 Längsachse des Stromschalters1 longitudinal axis of the power switch
2 1. Bimetall von R2, Stahl2 1. Bimetal from R2, steel
3 2. Bimetall von R2, Kupfer3 2. Bimetal of R2, copper
3' lichtbogenseitiges Kontaktende von 3, Hornbügel,3 'arc-side contact end of 3, horn bracket,
LichtbogenhornArcing horn
4 Strompfad4 current path
5 Pfeil5 arrow
6 Lichtbogen6 arcs
Kl bewegliche 1. StromkontaktanordnungKl movable 1st power contact arrangement
Pl Schaltkontakt von K2Pl switch contact from K2
P2, P3 Schaltkontakte von R2P2, P3 switch contacts of R2
P4 Schaltkontakt von KlP4 switching contact of terminal
Rl U-förmiges Lichtbogenhorn von KlRl U-shaped arcing horn from Kl
R2 U-förmige Stromleiterschleife von K2, Lichtbogenhorn R2 U-shaped conductor loop from K2, arcing horn

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Stromkontaktanordnungen eines Stromschalters a) mit mindestens zwei mechanisch gegeneinander verschiebbaren 1. und 2. Stromkontaktanordnungen (Kl, K2), b) wobei jede dieser Stromkontaktanordnungen (Kl, K2) mindestens einen Schaltkontakt (P4, Pl) aufweist und c) wobei mindestens eine der beiden Stromkontaktanordnungen (K2) eine Stromleiterschleife (R2) aufweist, dadurch gekennzeichnet, d) daß die Stromleiterschleife (R2) mindestens zwei Schaltkontakte (P2, P3) aufweist und e) daß diese Sehalt ontakte (P2, P3) der Stromleiterschleife (R2) im Schließzustand des Stromschalters mit den Schaltkontakten (P4, Pl) der beiden Stromkontaktanordnungen (Kl, K2) in gutleitender, mechanischer Druckverbindung stehen.1. Current contact arrangements of a current switch a) with at least two mechanically displaceable 1st and 2nd current contact arrangements (Kl, K2), b) each of these current contact arrangements (Kl, K2) having at least one switching contact (P4, Pl) and c) at least one of the two current contact arrangements (K2) has a current conductor loop (R2), characterized in that d) that the current conductor loop (R2) has at least two switch contacts (P2, P3) and e) that these contacts (P2, P3) of the current conductor loop (R2 ) in the closed state of the current switch with the switch contacts (P4, Pl) of the two current contact arrangements (Kl, K2) in a highly conductive, mechanical pressure connection.
2. Stromkontaktanordnungen nach Anspruch 1, dadurch gekennzeichnet, daß die Stromleiterschleife (R2) elastisch ausgebildet ist.2. Current contact arrangements according to claim 1, characterized in that the current conductor loop (R2) is elastic.
3. Stromkontaktanordnungen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stromleiterschleife (R2) als Bimetallstreifen ausgebildet ist, innεnseitig aus einem Material mit einer hohen Elastizitätskonstante und außenseitig aus einem elektrisch gutleitenden Material.3. Current contact arrangements according to one of the preceding claims, characterized in that the current conductor loop (R2) is designed as a bimetallic strip, on the inside made of a material with a high elasticity constant and on the outside of an electrically highly conductive material.
4. Stromkontaktanordnungen nach Anspruch 3, dadurch gekennzeichnet, daß der Bimetallstreifen innensεitig Stahl und außenseitig Kupfer oder eine Kupferlegierung aufweist.4. Current contact arrangements according to claim 3, characterized in that the bimetallic strip has steel on the inside and copper or a copper alloy on the outside.
5. Stromkontaktanordnungen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Schaltkontakte (P2, P3) der Stromleiterschleife (R2) und der Schaltkontakt (P4) der Stromkontaktanordnung (Kl), welche nicht mit der Stromleiterschleife (R2) verbunden ist, mit Lichtbogenhörnern (3', Rl) verbunden sind.5. Current contact arrangements according to one of the preceding claims, characterized in that the two Switching contacts (P2, P3) of the current conductor loop (R2) and the switching contact (P4) of the current contact arrangement (Kl), which is not connected to the current conductor loop (R2), are connected to arcing horns (3 ', Rl).
Stromkontaktanordnungen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stromleiterschleife (R2) einander gegenüberliegende Schaltkontakte (P2, P3) aufweist. Current contact arrangements according to one of the preceding claims, characterized in that the current conductor loop (R2) has switching contacts (P2, P3) lying opposite one another.
EP99926225A 1998-07-07 1999-07-06 Current contact system for a current switch Expired - Lifetime EP1095389B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19830232 1998-07-07
DE19830232A DE19830232A1 (en) 1998-07-07 1998-07-07 Current contact arrangements of a current switch
PCT/CH1999/000301 WO2000003406A1 (en) 1998-07-07 1999-07-06 Current contact system for a current switch

Publications (2)

Publication Number Publication Date
EP1095389A1 true EP1095389A1 (en) 2001-05-02
EP1095389B1 EP1095389B1 (en) 2002-03-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99926225A Expired - Lifetime EP1095389B1 (en) 1998-07-07 1999-07-06 Current contact system for a current switch

Country Status (5)

Country Link
US (1) US6320149B1 (en)
EP (1) EP1095389B1 (en)
CN (1) CN1146930C (en)
DE (2) DE19830232A1 (en)
WO (1) WO2000003406A1 (en)

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Also Published As

Publication number Publication date
US6320149B1 (en) 2001-11-20
CN1146930C (en) 2004-04-21
WO2000003406A1 (en) 2000-01-20
DE19830232A1 (en) 2000-01-13
EP1095389B1 (en) 2002-03-06
CN1307726A (en) 2001-08-08
DE59900953D1 (en) 2002-04-11

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