EP1771870A1 - Dispositif de commutation destine a des applications basse tension - Google Patents

Dispositif de commutation destine a des applications basse tension

Info

Publication number
EP1771870A1
EP1771870A1 EP05763086A EP05763086A EP1771870A1 EP 1771870 A1 EP1771870 A1 EP 1771870A1 EP 05763086 A EP05763086 A EP 05763086A EP 05763086 A EP05763086 A EP 05763086A EP 1771870 A1 EP1771870 A1 EP 1771870A1
Authority
EP
European Patent Office
Prior art keywords
switching device
contacts
contact
short
moving 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.)
Granted
Application number
EP05763086A
Other languages
German (de)
English (en)
Other versions
EP1771870B1 (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

Links

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 known for example from DE 10 05163 Cl, DE 44 25 330 Al or
  • EP 04 50 104 Bl known. They consist of at least one fixed contact and at least one moving contact with associated drive, which can be actuated either in particular electrically or else magnetically and can be activated by means of a specific algorithm.
  • DE 197 29 599 C1 tripping ⁇ criteria based on current (i) and current gradient (di / dt) are described, from which an advantageous Auspaw ⁇ algorithm is derived.
  • the opening of the main contacts is usually done via a mechanical switching mechanism.
  • This can be activated manually at the actuating lever ⁇ - or automatically when this egg nen overcurrent detect by thermi ⁇ cal, magnetic or electronic trip.
  • the proper times of the switching circuit 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 do not lead directly to the contact opening, but are initially directed only against the forces of the locked switching mechanism.
  • 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 re ⁇ al an
  • the invention-bearing idea is to use in the new switching device such a specific method for early detection of short-circuit, in which the imminent short circuit are detected early before reaching the currents necessary for contact separation.
  • the proper times of the probes and the Entklinkungsme- mechanism can be considered.
  • 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 Entkklinkungsmechanismus the release of the moving contact before or at least at the time by the stromabriol ⁇ the forces correspond to the contact force ,
  • KFE short-circuit early detection
  • the short circuit (KS) early detection acts on the - any kind of - trip chain, opens the lock early and avoids re-accident of the contacts. Parallel a locking of the contacts is opened and the opening due to the inherent dynamics is possible. This will be the
  • a change and simplification of the mechanical conditions on the switching device can be achieved in that - a possibly existing second pivot point in the mechanical contact system is eliminated and / or
  • FIG. 1 is a schematic representation of the detail of the contact arrangement of a switching device
  • Figure 2 is a graphical representation of the current waveform in a switching device according to Figure 1 and
  • FIG. 3 shows a flowchart to clarify the functional sequence of the switching device according to FIG. 1.
  • 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 Kon ⁇ tactile force, whereby a mechanical release chain is defined.
  • a lift-off force between the contacts is created in equal measure.
  • FIG. 1 shows a fixed contact carrier 1 for a fixed contact 2, which has a 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 assigned a pawl 5 and a toggle mechanism 6 with which the moving contact carrier 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 actuated in FIG. 1 specifically by a Thomson drive 8, which is known and operates on the eddy current principle and is comparatively fast.
  • FIG. 1 there is a unit 10 for short-circuit early detection (KFE).
  • KFE unit 10 advantageously works according to the locus method with the coordinates i and di / dt, for example according to the T_olerant G) rtsk_urve (TOK) method, for which the evaluation algorithm is described in detail in the above-mentioned DE 197 29 599 C, the disclosure of which is also the subject of the present application documents ("Incoperation by Reference").
  • This evaluation tealgorithmus is particularly suitable for this application and can gen including Vorstromereignisse be Wegsichti ⁇ .
  • the TOK evaluation algorithm is by software stored in Spei cher ⁇ an associated, not shown in Figure 1 micro controller.
  • the opening movement is advantageously accelerated.
  • the current forces exceed the locking or contact forces at time t3.
  • the contacts 2, 3 open faster in step S12.
  • the contacts 2, 3 fully ⁇ constantly open. The arc then tears off at the appropriate time and the current i is extinguished.
  • the latter is represented by the temporal current curve i (t) according to FIG. 2, to which reference has already been made above.
  • the graph of the graph 21 shows that after the response of the unit 10 for early detection of the short circuit at the time ti already at the time t 2 triggering the pawl 5 of the switching device according to Figure 1. For ⁇ time point t3, the lifting forces are immediately effective opening, wherein at the time t 4, the contacts are open.
  • Short-circuit detection unit 10 allows a trigger ⁇ chain already then set in motion before the lift-off of the contact system is achieved. This allows the mechanical release chain to be started very early. The disadvantages of a slow mechanical release chain for opening the contacts can thus be compensated.
  • a switching device with an arrangement according to Figure 1 can thus be a faster opening of the switching contacts 2 and 4 than in conventional switching devices.

Landscapes

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

Abstract

L'invention vise à employer un système de détection précoce de courts-circuits dans des dispositifs de commutation, et à activer ledit système pour le déclenchement des contacts. Selon l'invention, la détection d'un court-circuit est réalisée de façon si précoce, qu'avec prise en compte des temps propres des sondes de mesure et du mécanisme de relâchement (5, 6-8) au moyen d'un algorithme d'évaluation adapté, la libération du contact mobile (4) est effectuée avant ou au moins lorsque les forces d'interruption de courant correspondent à la force de contact. La force de contact est ainsi compensée et les contacts (2, 4) peuvent être ouverts rapidement.
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 true EP1771870A1 (fr) 2007-04-11
EP1771870B1 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
EP0450104B1 (fr) * 1990-03-28 1995-08-09 Siemens Aktiengesellschaft Disjoncteur rapide
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006010760A1 *

Also Published As

Publication number Publication date
WO2006010760A1 (fr) 2006-02-02
US20090046403A1 (en) 2009-02-19
US7916442B2 (en) 2011-03-29
EP1771870B1 (fr) 2012-12-26
DE102004036279A1 (de) 2006-03-23
CN1993790B (zh) 2011-10-12
CN1993790A (zh) 2007-07-04

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