WO1999014779A1 - Dispositif pour obtenir une energie auxiliaire pour un systeme de declenchement, et mode d'emploi - Google Patents

Dispositif pour obtenir une energie auxiliaire pour un systeme de declenchement, et mode d'emploi Download PDF

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Publication number
WO1999014779A1
WO1999014779A1 PCT/DE1998/002774 DE9802774W WO9914779A1 WO 1999014779 A1 WO1999014779 A1 WO 1999014779A1 DE 9802774 W DE9802774 W DE 9802774W WO 9914779 A1 WO9914779 A1 WO 9914779A1
Authority
WO
WIPO (PCT)
Prior art keywords
generator
circuit
arrangement according
switching contact
energy
Prior art date
Application number
PCT/DE1998/002774
Other languages
German (de)
English (en)
Inventor
Holger Hochgraef
Ulrich Baumgärtl
Wolfgang Röhl
Jeffery C. Mizener
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 DE59802469T priority Critical patent/DE59802469D1/de
Priority to EP98954194A priority patent/EP1016112B1/fr
Publication of WO1999014779A1 publication Critical patent/WO1999014779A1/fr

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
    • 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 an arrangement for obtaining auxiliary energy for operating a tripping system of a low-voltage circuit breaker, which has a spring-operated drive device for closing at least one movable switching contact and a releasable latching device for maintaining the closed state of the switching contact.
  • the trigger system comprises a trigger circuit for evaluating a current flowing through the switch contact on the basis of predetermined parameters and a switch device which can be activated by the trigger circuit for releasing the latching device by means of an actuating device for opening the switch contact.
  • the auxiliary energy required to operate the trigger system can be provided according to two fundamentally different principles.
  • One of these principles is the provision of an independent auxiliary energy source, ie a battery or a connection to an independent auxiliary network. Since batteries have a limited lifespan and an auxiliary network can fail, the operation of the release system according to this principle is often not considered to be sufficiently reliable.
  • the further principle is that the auxiliary energy required to operate the tripping system is obtained from the same network in which the circuit breaker is located. As a rule, the currents flowing through the switching contacts of the circuit breaker are provided
  • actuating device can either be acted upon directly by the secondary current of the current transformers, or a capacitor can be charged as an intermediate store by interposing a power supply device. Both arrangements differ in terms of their circuitry and the speed of response of the actuating device.
  • the invention has for its object to provide an arrangement for obtaining an auxiliary energy of the type mentioned, which is characterized by a particularly high level of reliability and at the same time requires only a small amount of circuitry.
  • this object is achieved in that, in order to provide the auxiliary energy, a generator designed as a mechanical-electrical converter is connected to the drive device and can inevitably be actuated when the switching contact closes.
  • the auxiliary energy is thus obtained from the mechanical kinetic energy of the circuit breaker.
  • this does not mean that the circuit breaker has to be designed differently from a mechanical point of view than has hitherto been customary or required.
  • the invention makes use of the fact that a not inconsiderable excess of mechanical drive energy is present in the circuit breaker. is there. This excess is necessary in order to bring about a safe switch-on with subsequent latching of the switching contacts in the closed position even with the greatest movement resistance.
  • the excess drive energy is absorbed by energy-consuming buffers and mechanical locks in order to avoid that important components of the circuit breaker are damaged or destroyed as a result of the jerky termination of the drive movement.
  • the excess drive energy is at least partially converted into electrical auxiliary energy for operating the release system and is thus used to advantage.
  • a piezoelectric generator can be provided. This is particularly suitable if the auxiliary energy is to be obtained along a relatively small part of the drive path of the drive device.
  • a generator is a magnetic-electrical generator. This can have the shape of a linear generator, for example, which is actuated at least along part of the drive path.
  • auxiliary energy The principle behind the generation of auxiliary energy according to the invention is that the duration of the energy production is relatively short. Since it may be desirable to keep the energy generated available over a longer period of time, it is advisable to connect an energy store between the generator and the trigger system.
  • the previously known trigger systems have an electromagnet as the actuating device. To trigger the circuit breaker, the electromagnet is energized and a plunger is moved against the force of a return spring.
  • the following features can be provided according to a further embodiment of the invention:
  • the actuation device is designed as a piezoelectric actuator to be fed directly by the energy generated by the generator when the switching contact closes,
  • Verkl kungsemcardi is designed such that it can be actuated by activating the actuator to maintain the closed state of the switching contact and
  • the switching device is connected in parallel to the actuator as a bridging switch, which is to be closed by the release circuit in order to reset the actuator and release the locking device.
  • any influence of the generator provided on the sequence of movements of the drive device can be ruled out in that the generator is only part of a towards the end of the switching contact effective end stop c, which is dimensioned for the absorption of a residual energy remaining after the switching contact has closed and the locking device has taken effect.
  • Piezoelectric generators and piezoelectric actuators are known in a number of different designs.
  • a piezoelectric generator is described in DE 34 24 339 AI and a piezoelectric actuation of a switching contact in DE 36 29 040 AI.
  • an AND gate is provided for linking a signal emitted by the trigger circuit for the occurrence of a short-circuit current and a signal of the generator, and for emitting an output signal when both signals occur in a temporal connection.
  • a circuit arrangement equipped with an AND element can advantageously be used to bring about an undelayed tripping of the circuit breaker by means of the output signal of the AND element if the circuit breaker is switched on to an already existing short circuit.
  • Figure 1 shows schematically simplified the overall arrangement of a circuit breaker with a drive device and an arrangement for obtaining auxiliary energy.
  • FIG. 2 also schematically shows a first embodiment in which a release magnet is provided to release a locking device.
  • a further exemplary embodiment is shown schematically in FIG. 3, in which a piezoelectric actuator interacts with the latching device.
  • FIG. 4 An end stop designed as a generator for providing auxiliary energy is illustrated in FIG. 4.
  • a movable switch contact 1 and a stationary switch contact 2 interacting with it, with subsequent current conductors 3 and 4, are shown as part of a main current path as part of a low-voltage circuit breaker. Contrary to the simplified representation, conventional circuit breakers have three or four main current paths and are therefore provided with a corresponding multiple arrangement of the modules mentioned.
  • the movable switch contact 1 is connected in an articulated manner to a pivotably mounted contact carrier 5, a contact force spring 6 being located between the contact carrier 5 and the movable switch contact 1.
  • a drive device designated as a whole as 7, is provided, which has a spring accumulator 10.
  • the spring accumulator 10 is shown in its tensioned state, in which it is held by means of a locking rod 11. Also shown is a release magnet 12 which can be actuated in a known manner.
  • the movable switch contact 1 can be actuated by the spring accumulator 10 by means of a drive link 13 indicated by a dot-dash line. This is done via a switching linkage 15 and a latching device 16, which ensures that the movable switching contact 1 remains in its closed position. Taktkraftfeder 6 is also maintained a required contact force.
  • circuit breaker So that the circuit breaker can perform its protective functions, current transformer 17, whose secondary winding 20 provides a current signal that is applied to a trigger circuit 21, is attached to current conductor 3 of main current path e mentioned.
  • This contains, in a known manner, analog or digital electronic circuits for evaluating the current signal present on the basis of predetermined parameters, in order to control an actuating device 22, which acts on the locking device 16, if necessary.
  • the auxiliary energy for operating the trigger circuit 21 and the actuating device 22 is generated by means of a generator 23 which is connected to the drive rod 13. This can be any generator of the type already known.
  • the auxiliary power generated is kept available for a long period of time by being stored in a capacitor 24. Further details are explained below with reference to FIGS. 2 and 3.
  • FIG. 2 only the main current path of the circuit breaker with the movable switching contact 1 in its closed position and the latching device and the tripping system are shown.
  • the locking device 16 is shown as a locking bar with a locking lug 25, on the locking pin 26 which can be displaced by a release magnet 27 against the action of a return spring 30.
  • a switching contact belonging to the trigger circuit 21 is shown as the switching device 31.
  • the tripping magnet 27 does not come from a separate auxiliary network or by means of the current transformer 17, but rather by means of the Generator 23 ( Figure 1) generated and m operated in a capacitor 24 buffered energy.
  • the locking pin 26 is held in engagement with the locking lug 25 of the locking device 16 by a piezoelectric actuator 32.
  • the circuit breaker is drawn in that the switching device 31 contained in the opening circuit 21 is parallel to the actuator 32 and this is thus short-circuited when the switching device 31 is closed. This leads to the immediate resetting of the actuator 32 and the withdrawal of the locking pin 26 for the purpose of releasing the locking device 16.
  • FIG. 4 shows an end stop 33 which is supported on a wall 34 of the circuit breaker in a relatively stationary manner.
  • the end stop 33 has a housing 35 in which there is an arrangement of piezoelectric generators 36.
  • Em plunger 37 serves to introduce kinetic energy into the piezoelectric generators 36. This is done by means of a pivotable lever 40, which can be part of the drive rod 13 m FIG. 1.
  • An arrow 41 indicates the transfer of the lever 40 from a rest position m to the switch-on position shown in dashed lines.
  • the end stop 33 is equally suitable for absorbing a linear movement and converting a residual mechanical energy into an auxiliary electrical energy.
  • An AND gate 42 to which two input signals can be fed, is shown in dashed lines in FIG.
  • One of the input signals is provided by the trigger circuit 21 when a short circuit current flows through the main circuit of the power switch (current conductors 3 and 4) and is accordingly referred to below as a short circuit signal.
  • the further input signal of the AND gate 42 is taken from the generator 23 for auxiliary energy and thus arises when the circuit breaker is switched on.
  • This input signal is referred to below as the switch-on signal and is associated with the occurrence of auxiliary energy at the generator 23, but does not represent the auxiliary energy itself.
  • the switch-on signal is thus obtained by means of the generator 23 with practically no reduction in the yield of energy.
  • An output signal output by the AND gate 42 when the switch-on signal and the short-circuit signal occur together is supplied to the actuating device 22 in order to release the latching device 16 without delay.
  • the AND gate 42 enables the circuit breaker to behave differently, depending on whether the short circuit occurs when the circuit breaker is switched on or whether the circuit breaker is switched on to an existing short circuit. In the latter case, it is namely advantageous to trigger the circuit breaker without delay in order to limit damage to the circuit breaker itself and the associated switchgear or the associated consumer as far as possible. In contrast, it is usually necessary to delay tripping if a short circuit occurs with the circuit breaker open. This delay, which is caused by the trip circuit, serves to ensure the desired selectivity in systems with several circuit breakers connected in series. len so that only faulty power supplies are switched off. The delayed triggering becomes effective in the arrangement according to FIG. 1 if only the short-circuit signal occurs and therefore no output signal is output by the AND gate 42.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Abstract

La présente invention porte sur un dispositif conçu pour obtenir une énergie auxiliaire destinée au fonctionnement d'un système de déclenchement d'un interrupteur de puissance basse tension. Ce dispositif présente une commande de fermeture d'un contact d'interrupteur (1) mobile et un générateur (23) activé par la fermeture du contact d'interrupteur (1). Le générateur (23), qu'il soit piézoélectrique ou autre, peut être conçu comme une butée d'arrêt (33), sollicitée en fin de course du dispositif d'actionnement (7) lors de la fermeture du contact d'interrupteur (1). L'apparition d'une valeur de sortie sur le générateur (23) sert, lors d'une mise sous tension en cas de court circuit, de signal pour provoquer le déclenchement immédiat de l'interrupteur de puissance.
PCT/DE1998/002774 1997-09-16 1998-09-14 Dispositif pour obtenir une energie auxiliaire pour un systeme de declenchement, et mode d'emploi WO1999014779A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59802469T DE59802469D1 (de) 1997-09-16 1998-09-14 Anordnung zur gewinnung einer hilfsenergie für ein auslösesystem und verwendung derselben
EP98954194A EP1016112B1 (fr) 1997-09-16 1998-09-14 Dispositif pour obtenir une energie auxiliaire pour un systeme de declenchement, et mode d'emploi

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19741659 1997-09-16
DE19741659.4 1997-09-16
DE19843245.3 1998-09-11
DE19843245A DE19843245A1 (de) 1997-09-16 1998-09-11 Anordnung zur Gewinnung einer Hilfsenergie für ein Auslösesystem und Verwendung derselben

Publications (1)

Publication Number Publication Date
WO1999014779A1 true WO1999014779A1 (fr) 1999-03-25

Family

ID=26040182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002774 WO1999014779A1 (fr) 1997-09-16 1998-09-14 Dispositif pour obtenir une energie auxiliaire pour un systeme de declenchement, et mode d'emploi

Country Status (3)

Country Link
EP (1) EP1016112B1 (fr)
DE (2) DE19843245A1 (fr)
WO (1) WO1999014779A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1241698A2 (fr) * 2001-03-15 2002-09-18 Heinrich Kopp Ag Dispositif de commande pour un mécanisme de déclenchement
WO2014135363A1 (fr) * 2013-03-08 2014-09-12 Siemens Aktiengesellschaft Commutateur, en particulier disjoncteur pour basses tensions
EP2804197A1 (fr) * 2013-05-17 2014-11-19 ABB Technology AG Mécanisme de verrouillage pour l'activation d'un commutateur

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006048841A1 (de) * 2006-10-13 2008-04-17 IGAM Ingenieurgesellschaft für angewandte Mechanik mbH Schnellschaltender Auslösemechanismus
DE102009033542B4 (de) 2009-07-14 2013-09-19 Siemens Aktiengesellschaft Schutzeinheit sowie elektrische Schaltanordnung mit einer Schutzeinheit
DE102011083583A1 (de) * 2011-09-28 2013-03-28 Siemens Aktiengesellschaft Schalter, insbesondere Leistungsschalter für Niederspannungen
CN106941326B (zh) * 2016-12-13 2019-01-01 西北工业大学 一种用于触发双稳态能量采集系统的自感知激励电路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702962A (en) * 1971-01-07 1972-11-14 Bosch Gmbh Robert Ac to dc rectifier circuit with rapid turn-off in case of overcurrent through the load circuit
EP0168340A1 (fr) * 1984-06-28 1986-01-15 Siemens Aktiengesellschaft Interrupteur sous vide avec un dispositif pour surveiller la pression intérieure
EP0590937A2 (fr) * 1992-09-30 1994-04-06 Eaton Corporation Appareil de commutation avec déclencheur digitale et remise à zéro d'une mémoire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702962A (en) * 1971-01-07 1972-11-14 Bosch Gmbh Robert Ac to dc rectifier circuit with rapid turn-off in case of overcurrent through the load circuit
EP0168340A1 (fr) * 1984-06-28 1986-01-15 Siemens Aktiengesellschaft Interrupteur sous vide avec un dispositif pour surveiller la pression intérieure
EP0590937A2 (fr) * 1992-09-30 1994-04-06 Eaton Corporation Appareil de commutation avec déclencheur digitale et remise à zéro d'une mémoire

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1241698A2 (fr) * 2001-03-15 2002-09-18 Heinrich Kopp Ag Dispositif de commande pour un mécanisme de déclenchement
EP1241698A3 (fr) * 2001-03-15 2004-04-21 Heinrich Kopp Ag Dispositif de commande pour un mécanisme de déclenchement
WO2014135363A1 (fr) * 2013-03-08 2014-09-12 Siemens Aktiengesellschaft Commutateur, en particulier disjoncteur pour basses tensions
CN105830190A (zh) * 2013-03-08 2016-08-03 西门子公司 开关、尤其是用于低压的功率开关
US10147566B2 (en) 2013-03-08 2018-12-04 Siemens Aktiengesellschaft Switch, in particular power switch, for low voltages
CN105830190B (zh) * 2013-03-08 2019-10-22 西门子公司 开关、尤其是用于低压的功率开关
EP2804197A1 (fr) * 2013-05-17 2014-11-19 ABB Technology AG Mécanisme de verrouillage pour l'activation d'un commutateur
CN104167312A (zh) * 2013-05-17 2014-11-26 Abb技术有限公司 用于启动开关的闭锁机构

Also Published As

Publication number Publication date
EP1016112A1 (fr) 2000-07-05
EP1016112B1 (fr) 2001-12-12
DE59802469D1 (de) 2002-01-24
DE19843245A1 (de) 1999-08-12

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