EP1771870B1 - Dispositif de commutation destine a des applications basse tension - Google Patents

Dispositif de commutation destine a des applications basse tension Download PDF

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Publication number
EP1771870B1
EP1771870B1 EP05763086A EP05763086A EP1771870B1 EP 1771870 B1 EP1771870 B1 EP 1771870B1 EP 05763086 A EP05763086 A EP 05763086A EP 05763086 A EP05763086 A EP 05763086A EP 1771870 B1 EP1771870 B1 EP 1771870B1
Authority
EP
European Patent Office
Prior art keywords
breaker device
contact
contacts
moving contact
current
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
EP05763086A
Other languages
German (de)
English (en)
Other versions
EP1771870A1 (fr
Inventor
Michael Anheuser
Gerd Griepentrog
Reinhard Maier
Bernd Trautmann
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 EP1771870A1 publication Critical patent/EP1771870A1/fr
Application granted granted Critical
Publication of EP1771870B1 publication Critical patent/EP1771870B1/fr
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
    • 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
    • H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
    • H01H71/43—Electrodynamic release mechanisms
    • 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
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/222—Power arrangements internal to the switch for operating the driving mechanism using electrodynamic repulsion
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit

Definitions

  • the invention relates to a switching device for low-voltage applications, with at least one fixed contact and at least one moving contact.
  • Switches for low voltage applications are for example from the DE 10 05163 C1 , of the DE 44 25 330 A1 or the EP 04 50 104 B1 known. They consist of at least one fixed contact and at least one moving contact with associated drive, which is either in particular electrically or magnetically actuated and by means of a specific algorithm 'can be activated.
  • tripping criteria are described on the basis of current (i) and current gradient (di / dt), from which an advantageous evaluation algorithm is derived.
  • the opening of the main contacts is usually done via a mechanical switching mechanism.
  • This can be triggered manually on the actuating lever - or automatically by thermal, magnetic or electronic triggers when they detect an overcurrent.
  • the proper times of the switching mechanism are in the range of several ms, so that even in the case of larger short circuits, the existing electrodynamic forces from the current loop does not lead directly to the contact opening, but are initially directed only against the forces of the locked switch latch.
  • Electronic short-circuit releases can be equipped with a so-called “electromagnetic bypass”, in order to cause rapid tripping at high short-circuit currents.
  • Some devices also allow a temporary opening without a final forced opening through the lock.
  • an improved switching device can be realized.
  • the invention-bearing idea is to use in the new switching device such a specific method for short-circuit detection, in which the imminent short circuit is detected early before reaching the necessary for the contact lifting currents. According to the invention then the proper times of the probes and the Entklinkungsmechanismus be taken into account.
  • Method for example traveling wave method.
  • the detection of a short circuit by a suitable algorithm takes place so early that taking into account the proper times of the probes and the Entklinkungsmechanismus the release of the moving contact before or at least at the time by the current-dissipating forces correspond to the contact force.
  • Switching devices of the prior art have a switching mechanism which is activated by the overcurrent or short-circuit current release.
  • the contacts are opened against the closing acting contact force, whereby a mechanical release chain is defined.
  • a lift-off force between the contacts is created in equal measure.
  • FIG. 1 a fixed contact carrier 1 for a fixed contact 2 is present, the one moving contact carrier. 3 is assigned for a moving contact 4.
  • the moving contact carrier 3 is pivotable about an axis I.
  • the moving contact 4 is a pawl 5 and a toggle mechanism 6 associated with which the Bewegrometown 3 can be activated.
  • the toggle lever 6 is articulated via a spring to the housing or another fixed reference points.
  • the toggle mechanism 6 is in FIG. 1 specifically by a Thomson drive 8, which is known and operates on the eddy current principle and is relatively fast, operated.
  • the KFE unit 10 advantageously operates according to the locus method with the coordinates i and di / dt, for example according to the tolerant loci (TOK) method, to which the evaluation algorithm in detail in the already mentioned DE 197 29 599 C is described.
  • TOK tolerant loci
  • This evaluation algorithm is particularly suitable for present application and can, among other things, also take into account bias currents.
  • the TOK evaluation algorithm is software-based in the memory of an associated, in FIG. 1 filed microcontroller not shown.
  • FIG. 2 is the time course during the switching operation of the contact arrangement according to FIG. 1 Plotted on the abscissa are the time t and on the ordinate the associated arc current i in arbitrary units.
  • Graph 21 shows the current profile when a short circuit occurs.
  • the interaction of the unit 10 for early detection of short circuits (KFE) with specific evaluation algorithm with the pawl mechanism 5 on the one hand and the drive 6 for the moving contact 3 on the other hand seen: After detection of the short circuit 'in the KFE 10 at time t1 with step S10 on the one hand, a signal to an actuator 5' for the pawl On the other hand, the energization of the Thomson drive 8. At the time t 2 , the pawl 5 is free and the Thomson drive 8 is actuated. With method step S11, the opening of the contacts 2, 3 is now introduced at a time at which the moving contact 4 is free.
  • the opening movement is advantageously accelerated.
  • the current forces exceed the locking or contact forces at time t 3 .
  • the contacts 2, 3 open faster in step S12.
  • the contacts 2, 3 are fully open. The arc then tears off at the appropriate time and the current i is extinguished.
  • the latter is due to the temporal current i (t) according to FIG. 2 already mentioned above.
  • the curve of the graph 21 shows that after the response of the unit 10 for early detection of the short circuit at time t 1 already at the time t 2 triggering the pawl 5 of the switching device according to FIG. 1 he follows. At the time t 3 , the lift-off forces are effective immediately opening, wherein at time t 4, the contacts are open.
  • a switching device with an arrangement according to FIG. 1 can thus be a faster opening of the switching contacts 2 and 4 than in conventional switching devices.
  • the arrangement described above in a switching device with tiltable about an axis movable contact arrangement can also be transferred to switching devices with bridge contacts.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (11)

  1. Appareil de commutation pour des applications en basse tension, ayant au moins un contact fixe et au moins un contact mobile, ayant un dispositif de détection précoce d'un court-circuit et ayant un actionneur d'ouverture des contacts, l'unité de détection ( 10 ) précoce de court-circuit fonctionnant si rapidement qu'en comptant en outre les temps propres de sonde de mesure ainsi que d'un mécanisme ( 5, 6 à 8 ) de désencliquetage, une libération du au moins un contact ( 4 ) mobile s'effectue avant ou au moins à l'instant ( t2 ) où les forces électrodynamiques de soulèvement créant un flux ( i ) de courant correspondent à la force de contact et dans lequel un algorithme d'évaluation des temps propres ou des sondes de mesure ainsi que du mécanisme ( 5, 6 à 8 ) de désencliquetage est pris en compte.
  2. Appareil de commutation suivant la revendication 1, caractérisé en ce que l'unité ( 10 ) de détection précoce d'un court-circuit opère suivant un procédé à lieu de points.
  3. Appareil de commutation suivant la revendication 2, caractérisé en ce que le procédé à lieu de points utilise ce que l'on appelle le lieu de points tolérant ( procédé TOK - Tolerante Ortskurven ).
  4. Appareil de commutation suivant la revendication 3, caractérisé en ce que l'algorithme TOK prend en compte des évènements de pré-décharge.
  5. Appareil de commutation suivant la revendication 1, caractérisé en ce que le mécanisme de désencliquettement comporte un cliquet pour l'encliquetage et le désencliquetage du au moins un contact ( 4 ) mobile.
  6. Appareil de commutation suivant la revendication 5, caractérisé en ce que le cliquet ( 5 ) peut être commandé par l'unité ( 10 ) de détection précoce d'un court-circuit.
  7. Appareil de commutation suivant l'une des revendications précédentes,
    caractérisé en ce qu'il y a un entraînement ( 8 ) par courants de Foucault.
  8. Appareil de commutation suivant la revendication 7, caractérisé en ce que l'entraînement ( 8 ) agit par l'intermédiaire d'une genouillère ( 6 ) sur un porte-contact ( 3 ) du contact ( 4 ) mobile.
  9. Appareil de commutation suivant l'une des revendications précédentes,
    caractérisé en ce que l'actionneur d'ouverture des contacts ( 2, 4 ), notamment un actionneur ( 5' ) distinct pour le cliquet ( 5 ), et l'entraînement ( 8 ) du contact ( 4 ) mobile peuvent être activés en même temps par l'algorithme d'évaluation.
  10. Appareil de commutation suivant la revendication 9, caractérisé en ce que l'algorithme d'évaluation prend en compte les forces de soulèvement des contacts ( 2, 4 ) provoquées par le courant.
  11. Appareil de commutation suivant la revendication 9, caractérisé en ce que l'algorithme d'évaluation est mémorisé dans une mémoire d'une microunité de commande.
EP05763086A 2004-07-27 2005-07-26 Dispositif de commutation destine a des applications basse tension Expired - Fee Related EP1771870B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004036279A DE102004036279A1 (de) 2004-07-27 2004-07-27 Schaltgerät für Niederspannungsanwendungen
PCT/EP2005/053642 WO2006010760A1 (fr) 2004-07-27 2005-07-26 Dispositif de commutation destine a des applications basse tension

Publications (2)

Publication Number Publication Date
EP1771870A1 EP1771870A1 (fr) 2007-04-11
EP1771870B1 true EP1771870B1 (fr) 2012-12-26

Family

ID=35241270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05763086A Expired - Fee Related EP1771870B1 (fr) 2004-07-27 2005-07-26 Dispositif de commutation destine a des applications basse tension

Country Status (5)

Country Link
US (1) US7916442B2 (fr)
EP (1) EP1771870B1 (fr)
CN (1) CN1993790B (fr)
DE (1) DE102004036279A1 (fr)
WO (1) WO2006010760A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005163B (de) * 1952-10-18 1957-03-28 Maier & Cie C Schaltmechanismus fuer elektrische Selbstschalter
FR2185853B1 (fr) * 1972-05-26 1977-12-30 Merlin Gerin
US4042895A (en) * 1975-09-16 1977-08-16 Westinghouse Electric Corporation Combination motor-starter and circuit breaker
DE59009511D1 (de) * 1990-03-28 1995-09-14 Siemens Ag Schnellschalter.
DE4425330A1 (de) 1993-07-26 1996-01-25 Siemens Ag Schalter zur Strombegrenzung
US5694098A (en) * 1996-05-20 1997-12-02 Eaton Corporation Rate of current rise sensitive slot motor and switching apparatus having current limiting contact arrangement incorporating said slot motor
US5793270A (en) * 1996-09-03 1998-08-11 Eaton Corporation Circuit breaker with latch preventing rebound of blow open contact arm
DE19729599C1 (de) * 1997-07-10 1999-02-04 Siemens Ag Verfahren und Anordnung zur Erkennung von Kurzschlüssen in Niederspannungsnetzen
DE19839616A1 (de) * 1998-08-31 2000-03-02 Siemens Ag Schutzeinrichtung für Niederspannungsnetze

Also Published As

Publication number Publication date
US7916442B2 (en) 2011-03-29
EP1771870A1 (fr) 2007-04-11
WO2006010760A1 (fr) 2006-02-02
DE102004036279A1 (de) 2006-03-23
CN1993790A (zh) 2007-07-04
US20090046403A1 (en) 2009-02-19
CN1993790B (zh) 2011-10-12

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