WO2005024879A1 - Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation - Google Patents

Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation Download PDF

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Publication number
WO2005024879A1
WO2005024879A1 PCT/EP2004/009544 EP2004009544W WO2005024879A1 WO 2005024879 A1 WO2005024879 A1 WO 2005024879A1 EP 2004009544 W EP2004009544 W EP 2004009544W WO 2005024879 A1 WO2005024879 A1 WO 2005024879A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching device
actuator
circuit
overload
piezo
Prior art date
Application number
PCT/EP2004/009544
Other languages
German (de)
English (en)
Inventor
Gerd Griepentrog
Reinhard Maier
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
Priority to EP04764519A priority Critical patent/EP1658628A1/fr
Publication of WO2005024879A1 publication Critical patent/WO2005024879A1/fr

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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
    • H01H71/127—Automatic release mechanisms with or without manual release using piezoelectric, electrostrictive or magnetostrictive trip units

Definitions

  • the invention relates to a short-circuit and overload release for a switching device that contains a switch lock that can be unlatched by a piezoelectric actuator, for which a piezoelectric transducer is provided.
  • Piezo actuators in conjunction with a current measuring device and an electronic processing unit are suitable as triggers for overload in a circuit breaker. They replace the bimetallic release of a conventional circuit breaker and act mechanically directly on the key switch in a similar way to the bimetallic release.
  • a signal representing the flowing current is fed to the electronic processing unit.
  • a separate current sensor such as e.g. a current transformer or the like required.
  • the electronic processing unit calculates when an overload is present on the basis of methods and regulations known per se.
  • Such an overload release unit has a significantly increased setting range due to the electronic processing unit, i.e. that the nominal current and thus the current considered to be overload can be changed by the user within wide limits and can thus be adapted to the circumstances of the application.
  • a mechanical actuator is usually used as a short-circuit release in mechanical switching devices, through which current flows and in the event of a short circuit mechanically unlatching the switching lock and thus switching it off due to the magnetic forces caused thereby.
  • US Pat. No. 4,042,967 A discloses the use of a piezo actuator for switching off an earth fault. in this connection In the event of a short circuit, the piezo actuator is directly controlled by electronics, thus prompting a rapid shutdown in the event of a short circuit.
  • EP 0 517 049 AI describes a permanent magnetic residual current release which acts on a component containing permanent magnets with a pole face against which an armature element which is attracted by the permanent flux against the force of a spring acts.
  • An actuator made of piezoelectric material is assigned to the pole face, the actuator counteracting the armature force and / or lifting the armature element from the pole face when the signal occurs.
  • the object of the invention is that the piezo actuator is triggered on the one hand by an electronics known per se in the event of an overload. is controlled and thus the switch lock for disconnecting the contacts is released and that, on the other hand, for rapid tripping in the event of a short circuit, a piezo actuator containing the current - in this case the short-circuit current - acts on the ferromagnetic material via a trigger coil (solenoid)
  • the piezo actuator actuates the switch lock, which in turn acts on a switch that interrupts the short-circuit / overload current.
  • the coil can have several turns as a magnetic actuator. Possibly. it may also be sufficient if only the current-carrying conductor is guided past the piezo actuator.
  • the invention in contrast to the prior art, is a combination of a piezo actuator and a magnetic short-circuit actuator, whereby both an overload and a short-circuit shutdown can be brought about, that both magnetic and dielectric properties of the piezo actuator are used.
  • the combination of trigger coil and piezo actuator can advantageously be used as a current sensor in that the magnetic forces caused by the trigger coil cause a deflection on the piezo actuator, the amplitude of which is a measure of the flowing current.
  • This deflection causes the piezoelectric principle to generate a voltage at the piezo actuator, which can be evaluated by an associated electronics. Since the piezo actuator is operated in this case both as an actuator and as a sensor, the term “piezo transducer” is to be generalized here.
  • the advantageous combination of electromagnetic release and piezo transducer is used to provide both a safe short-circuit protection and an overload protection with u.
  • the short-circuit protection is implemented by the fast electromagnetic release, the overload protection by a possibly electronically controlled piezo converter.
  • the piezo transducer is mechanically engaged with the release of the key switch.
  • the electromagnetic transducer triggers indirectly with magnetic repercussions on the piezo transducer.
  • the piezo transducer is provided with a ferromagnetic material.
  • the piezo converter can equally be used as a current sensor in that the forces caused by the current flow through the electromagnetic converter cause bending vibrations of the piezo converter, which in turn can be evaluated as voltages at the connections of the piezo converter.
  • FIG. 1 and 2 show a triggering system consisting of an electrical piezo converter on the one hand and a coil for short-circuit detection on the other - alternatively in the locked or released state
  • FIG. 3 shows a triggering system according to FIG. 1/2 with an additional, separate current transformer for overload detection and
  • Figure 4 is a realization of a further improved trigger system.
  • 1 denotes a mechanical switch.
  • a trigger system is assigned to the mechanical switch 1, which can consist, for example, of a key switch 10.
  • a piezo actuator 11 is assigned to the switch lock 10. The piezo Actuator 11 is located in a holder 12 and is controlled by an electronic circuit, which is generally designated 20.
  • the switch 1 is connected to the key switch 10 via a mechanical actuation 2. Furthermore, a coil 5 is present in the circuit to be switched.
  • FIG. 1 which shows the locked state of the switch 1
  • a signal is sent to the piezo actuator 11 via the electronics 20, the piezo actuator 11 is activated in the sense of bending and the switching lock 10 is thus released.
  • the switch 1 opens what is shown in Figure 2.
  • the network forms a load circuit 2 with the circuit to be switched, the coil 5 having at least one coil turn, but preferably a plurality of turns.
  • the coil 5 through which the load current flows which is a solenoid and generates a magnetic field, acts magnetically on the piezo converter 11 and thus realizes a magnetic actuator.
  • the piezo converter 11 generally already contains ferromagnetic material, so that the magnetic field of the coil 5 can cause the piezo converter 11 to move.
  • the switch 1 can be switched off with the piezo converter 11 via the switch lock 10. If the piezo converter 11 contains no magnetic material, a ferromagnetic plate can be attached to the piezo converter 11, for example by gluing.
  • the triggering device according to FIG. 1/2 is supplemented by the fact that an additional current transformer 30 is present in the load circuit 2.
  • the current is detected by the additional current transformer 30, which is followed by a unit for overload detection 35 which acts on a modified electronics unit 20.
  • the current is measured via the current transformer 30 and evaluated in the overload detection unit 35.
  • the output signal of the unit for overload detection reaches the electronics unit 20 ⁇ .
  • the electronics unit 20 controls the piezo actuator 11, which then reacts in accordance with FIG. 2 and opens the switch 1.
  • the piezo converter 11 acts directly as a current sensor in that the current via the trigger coil 5 initially only moves the piezo actuator 11 in such a way that no triggering takes place yet.
  • the movement of the piezo actuator 11 can, however, be tapped as a voltage.
  • the further modified electronics unit 20 contains, in addition to the unit 20, a separate unit 20 ⁇ for detecting and evaluating the voltage signal generated by the piezo converter 11. In this way, a desired current measurement with overload detection can also be implemented.
  • the piezo converter 11 serves as an actuator in the sense of a trigger.
  • a piezo actuator 11 defined in this way is advantageously space-saving and requires only a small actuation energy.
  • a wide setting range can be specified for electronic overload detection.
  • the short-circuit release which can now be effected directly with the piezo actuator 11 via the coil 5 in the load circuit 2 only requires a simple construction, since only one latching element is present in the switching lock 10.
  • the piezoelectric transducer used as the piezo actuator 11 in FIGS. 1 to 4 is not a ferromagnetic material contains, a ferromagnetic plate can be attached to the piezoelectric transducer in a simple manner.
  • the magnetic field of the magnetic actuator and thus of the current can be detected by the piezoelectric transducer. This means that a current is recorded simply by evaluating the movement of the piezo converter as a result of the current in the load circuit - even without triggering the switch lock.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)

Abstract

Des dispositifs de commutation dans lesquels des convertisseurs piézo-électriques jouent le rôle d'actionneurs, font partie de l'état de la technique. Selon la présente invention, un actionneur magnétique (5) est associé au convertisseur piézo-électrique (11) en tant qu'actionneur pour déverrouiller le verrou de commutation (10), afin de réaliser une protection contre la surcharge et le court-circuit. Lorsqu'il est relié à un solénoïde, le convertisseur piézo-électrique (11) peut servir de capteur pour déterminer le courant en circulation.
PCT/EP2004/009544 2003-08-29 2004-08-26 Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation WO2005024879A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04764519A EP1658628A1 (fr) 2003-08-29 2004-08-26 Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003140003 DE10340003B4 (de) 2003-08-29 2003-08-29 Kurzschluss- und Überlastauslöser für ein Schaltgerät
DE10340003.6 2003-08-29

Publications (1)

Publication Number Publication Date
WO2005024879A1 true WO2005024879A1 (fr) 2005-03-17

Family

ID=34258290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/009544 WO2005024879A1 (fr) 2003-08-29 2004-08-26 Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation

Country Status (4)

Country Link
EP (1) EP1658628A1 (fr)
CN (1) CN1856856A (fr)
DE (1) DE10340003B4 (fr)
WO (1) WO2005024879A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111407A1 (fr) * 2005-04-22 2006-10-26 Norbert Beyrard Disjoncteur-contacteur a moyen de blocage commande par un actuateur piezoelectrique
WO2007088365A1 (fr) * 2006-02-03 2007-08-09 Pbt (Ip) Limited Mecanisme de liberation piezoelectrique avec des caracteristiques de resistance aux vibrations

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030095B4 (de) 2008-06-25 2012-02-23 Eaton Industries Gmbh Schaltantrieb für einen elektrischen Schalter und elektrischer Schalter
DE102009033542B4 (de) 2009-07-14 2013-09-19 Siemens Aktiengesellschaft Schutzeinheit sowie elektrische Schaltanordnung mit einer Schutzeinheit
DE102013203985A1 (de) 2013-03-08 2014-09-11 Siemens Aktiengesellschaft Schalter, insbesondere Leistungsschalter für Niederspannungen
EP3419064A1 (fr) * 2017-06-23 2018-12-26 Koninklijke Philips N.V. Dispositif avec plusieurs unités d'actionneur à matériau électro-actif et procédé d'actionnement
EP3837709A1 (fr) 2018-09-27 2021-06-23 Siemens Aktiengesellschaft Disjoncteur basse tension
CN110262387B (zh) * 2019-05-31 2021-08-17 温州大学激光与光电智能制造研究院 磁效应智能开关自动化控制系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548732A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut
WO2000063939A1 (fr) * 1999-04-19 2000-10-26 Pbt (Ip) Limited Mecanisme integre de declenchement mecanique a commande electrique
US20020080003A1 (en) * 2000-12-08 2002-06-27 Texas Instruments Incorporated ARC responsive thermal circuit breaker
DE10118098A1 (de) * 2001-04-11 2002-10-17 Abb Patent Gmbh Installationsschaltgerät

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042967A (en) * 1975-10-28 1977-08-16 Yujiro Yamamoto Ground fault sensor
DE4118177C2 (de) * 1991-06-03 1996-11-28 Abb Patent Gmbh Permanentmagnetischer Fehlerstromauslöser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548732A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut
WO2000063939A1 (fr) * 1999-04-19 2000-10-26 Pbt (Ip) Limited Mecanisme integre de declenchement mecanique a commande electrique
US20020080003A1 (en) * 2000-12-08 2002-06-27 Texas Instruments Incorporated ARC responsive thermal circuit breaker
DE10118098A1 (de) * 2001-04-11 2002-10-17 Abb Patent Gmbh Installationsschaltgerät

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111407A1 (fr) * 2005-04-22 2006-10-26 Norbert Beyrard Disjoncteur-contacteur a moyen de blocage commande par un actuateur piezoelectrique
US7528334B2 (en) 2005-04-22 2009-05-05 Norbert Beyrard Circuit breaker-contactor with a piezo-electric controlled locking
WO2007088365A1 (fr) * 2006-02-03 2007-08-09 Pbt (Ip) Limited Mecanisme de liberation piezoelectrique avec des caracteristiques de resistance aux vibrations

Also Published As

Publication number Publication date
DE10340003A1 (de) 2005-04-07
DE10340003B4 (de) 2006-02-16
EP1658628A1 (fr) 2006-05-24
CN1856856A (zh) 2006-11-01

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