WO1999041759A1 - Procede et dispositif pour faire fonctionner un disjoncteur - Google Patents

Procede et dispositif pour faire fonctionner un disjoncteur Download PDF

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Publication number
WO1999041759A1
WO1999041759A1 PCT/DE1999/000375 DE9900375W WO9941759A1 WO 1999041759 A1 WO1999041759 A1 WO 1999041759A1 DE 9900375 W DE9900375 W DE 9900375W WO 9941759 A1 WO9941759 A1 WO 9941759A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
circuit breaker
magnet
electromagnet
voltage
Prior art date
Application number
PCT/DE1999/000375
Other languages
German (de)
English (en)
Inventor
Bernd Ette
Peter Schust
Andreas Pancke
Hans Rehaag
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 JP2000531856A priority Critical patent/JP2004500680A/ja
Priority to EP99907324A priority patent/EP1053555A1/fr
Publication of WO1999041759A1 publication Critical patent/WO1999041759A1/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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
    • 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

Definitions

  • the invention relates to a method and a device for operating a circuit breaker having an Uberstro release and at least one electromagnet depending on its operating state when a short circuit occurs and can be used to protect electrical engineering systems.
  • circuit breakers have tripping magnets which are integrated in the tripping circuit. Such a low-voltage circuit breaker is described in US 4,377,837 A. The tripping magnet is built into the circuit breaker and interacts with a latching device.
  • circuit breakers can contain further electromagnets, which can be used, for example, as a solenoid for releasing a
  • a short circuit occurs in a switchgear, it can be important to protect a system, a consumer and, in particular, a circuit breaker, whether the short circuit occurs during operation, i.e. when the switch contacts are closed, or only when the switch contacts close. 2 While in the event of a short-circuit during operation, i.e. with the switch contacts closed, the circuit breaker may only trip after a specified, set delay for reasons of selectivity, in the event of a short circuit when the switch contacts close, it is sensible to open the circuit breaker immediately. This effectively protects the circuit breaker and the entire system from the effects of the short-circuit current.
  • the electronic overcurrent release is self-supplied, that is, the release is only activated after the switch contacts are closed.
  • the overcurrent release cannot detect whether the switch contacts were already closed before they were activated. There is therefore no possibility of carrying out the sensible measure described.
  • the invention is therefore based on the object of providing a method and a device with which reliable detection is made possible using simple means and using already existing components as to whether the circuit breaker is switched on to an existing short circuit.
  • a particular advantage of the invention consists in the fact that in the circuit breakers there are already electrical magnets for detecting a coincidence of the switching on and the occurrence or presence of a short-circuit current 3 are used by generating a control command for the instantaneous tripping of the circuit breaker when an output variable signaling a switch-on operation is generated on an evaluation circuit connected to a winding of the electromagnet and simultaneous detection of a short-circuit current by the overcurrent release.
  • Another advantage of the invention is that the acquisition of a signal related to the switching process is not limited to the tripping magnet, but this signal also from other electromagnets arranged in the circuit breaker, for example from work or. Auxiliary magnets that can be derived. It is also possible to use several electromagnets. What is decisive for the selection here is which magnets in addition to the
  • Tripping magnet are arranged in the circuit breaker and which magnet or which magnets are or are best suited after the assembly in the switch for the purposes of generating an induced voltage from the switch vibration. Further technical criteria for the selection of the electromagnets to be used are the number of turns and the structure of the magnetic circuit.
  • Figure 1 is a schematic representation of a circuit breaker
  • FIG. 3 shows a stylized oscillogram of the decaying pulsed alternating voltage generated by the vibration when the switch contacts close in the release magnet.
  • FIG. 4 shows a stylized oscillogram of the decaying DC voltage generated by integration from the AC voltage.
  • a circuit breaker 1 has the following essential components or assemblies:
  • Overcurrent release 2 current transformer 3, first and second evaluation circuits 4 and 5, release magnet 6 for switching on with latching 7, spring accumulator 8, cam 9, manual transmission 10, switching linkage 11, switching shaft 12, switching mechanism 13 with trigger magnet 14, contact force spring 15 with carrier 16 of the movable one Switching contact 17, fixed switching contact 18 and main current path 19.
  • a further trigger magnet 20 with associated evaluation circuit 21 is also provided as an accessory if required.
  • the signals on the tripping magnet 14 present in each circuit breaker 1 are evaluated in order to detect the coincidence of just switching on and the occurrence of a short-circuit current and the resulting instantaneous tripping of a circuit breaker 1.
  • further electromagnets 6, 20 in the recognition process instead of the trigger magnet 14 or in addition to the trigger magnet 14.
  • Such further work or Auxiliary magnets can be solenoids for releasing a spring-loaded device for remote activation, electromagnets in undervoltage releases or electromagnets in additional shunt releases.
  • the trigger magnet 14 with its components coil, coil body, permanent magnet and plunger forms a sensor in the present exemplary embodiment, in which slight movements of the plunger in the coil body occur due to vibrations. These vibrations, caused by the switching process, induce an alternating voltage in the coil. Due to the mechanical energy released when the switch contacts 17, 18 are closed, the trigger magnet 14 is shaken so that the decaying pulsed AC voltage induced in its coil reaches a sufficient size for detection and evaluation. In the present exemplary embodiment, these pulses have subsided after approximately 30 milliseconds.
  • the induced decaying pulsed AC voltage shown in FIG. 3 can be used for effective evaluation
  • the DC voltage generated via the integrator circuit is now evaluated by a microcontroller on an analog / digital converter channel. This evaluation is carried out in such a way that, in the event of an overcurrent trip of the circuit breaker 1 and the presence of an induced voltage or of the decaying DC voltage signal derived therefrom, the circuit breaker 1 trips again, whereas, in the event of an overcurrent trip of the circuit breaker 1 without the presence of an induced voltage or one of them 6 derived DC signals of the circuit breaker 1 with a predetermined delay realizes the trip.
  • the mode of operation of the circuit breaker 1 with instantaneous tripping in the event of a short circuit is therefore based on the fact that the trigger is activated by the current flow in the circuit breaker and immediately detects a short circuit current and can also recognize whether or not on the basis of the level or the presence of the direct current signal the switch contacts 17, 18 have just been closed. Depending on this information, you can now react appropriately, i.e. switch off either immediately or after a delay.

Abstract

L'invention concerne un procédé et un dispositif pour faire fonctionner un disjoncteur (1) à déclenchement non temporisé en cas de court-circuit, s'utilisant pour protéger des installations électriques. La principale caractéristique de l'invention réside dans le fait qu'au moment où les contacts d'interrupteur se ferment, la tension induite dans la bobine par des électro-aimants (6,14,20) présents de toute façon dans le disjoncteur (1) est détectée et évaluée. La tension alternative pulsée décroissante détectée est transformée en tension continue décroissante par un circuit d'intégration et est évaluée par un microcontrôleur sur un canal de conversion analogique/numérique. Lorsque le déclencheur est activé dans le commutateur (1) par le flux de courant injecté et qu'il détecte immédiatement après, un courant de court-circuit, il peut, en présence d'une tension induite ou d'un signal de courant continu qui en est dérivé, s'enclencher à nouveau immédiatement, ou bien avec un décalage prédéterminé, sans la présence de la tension induite ou du signal de tension continue.
PCT/DE1999/000375 1998-02-12 1999-02-05 Procede et dispositif pour faire fonctionner un disjoncteur WO1999041759A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000531856A JP2004500680A (ja) 1998-02-12 1999-02-05 遮断器の作動方法及び装置
EP99907324A EP1053555A1 (fr) 1998-02-12 1999-02-05 Procede et dispositif pour faire fonctionner un disjoncteur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998106345 DE19806345A1 (de) 1998-02-12 1998-02-12 Verfahren und Vorrichtung zum Betrieb eines Leistungsschalters
DE19806345.8 1998-02-12

Publications (1)

Publication Number Publication Date
WO1999041759A1 true WO1999041759A1 (fr) 1999-08-19

Family

ID=7857884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/000375 WO1999041759A1 (fr) 1998-02-12 1999-02-05 Procede et dispositif pour faire fonctionner un disjoncteur

Country Status (4)

Country Link
EP (1) EP1053555A1 (fr)
JP (1) JP2004500680A (fr)
DE (1) DE19806345A1 (fr)
WO (1) WO1999041759A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300000B6 (cs) * 2001-09-10 2009-01-14 Lekov A.S. Jistic proti proudovému pretížení stejnosmerného proudového obvodu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102737917A (zh) * 2011-04-02 2012-10-17 三信国际电器上海有限公司 过电流保护用断路器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166260A (en) * 1978-03-29 1979-08-28 General Electric Company Circuit breaker accessory assembly
GB2028035A (en) * 1978-08-08 1980-02-27 Mitsubishi Electric Corp Power circuit breaker system
US4377837A (en) * 1980-04-15 1983-03-22 Westinghouse Electric Corp. Circuit interrupter with overtemperature trip device
DE3612119A1 (de) * 1986-04-08 1987-10-22 Siemens Ag Anordnung zur montage von hilfsausloesern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166260A (en) * 1978-03-29 1979-08-28 General Electric Company Circuit breaker accessory assembly
GB2028035A (en) * 1978-08-08 1980-02-27 Mitsubishi Electric Corp Power circuit breaker system
US4377837A (en) * 1980-04-15 1983-03-22 Westinghouse Electric Corp. Circuit interrupter with overtemperature trip device
DE3612119A1 (de) * 1986-04-08 1987-10-22 Siemens Ag Anordnung zur montage von hilfsausloesern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300000B6 (cs) * 2001-09-10 2009-01-14 Lekov A.S. Jistic proti proudovému pretížení stejnosmerného proudového obvodu

Also Published As

Publication number Publication date
DE19806345A1 (de) 1999-08-19
JP2004500680A (ja) 2004-01-08
EP1053555A1 (fr) 2000-11-22

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