WO2002050856A1 - Declencheur pour disjoncteur - Google Patents

Declencheur pour disjoncteur Download PDF

Info

Publication number
WO2002050856A1
WO2002050856A1 PCT/DE2001/004560 DE0104560W WO0250856A1 WO 2002050856 A1 WO2002050856 A1 WO 2002050856A1 DE 0104560 W DE0104560 W DE 0104560W WO 0250856 A1 WO0250856 A1 WO 0250856A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
circuit breaker
circuit
trigger
drive
Prior art date
Application number
PCT/DE2001/004560
Other languages
German (de)
English (en)
Inventor
Josef Griesbeck
Hans-Georg Finger
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
Publication of WO2002050856A1 publication Critical patent/WO2002050856A1/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
    • H01H71/12—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 release, such as undervoltage release or shunt release, in particular for circuit breakers or circuit breakers, collectively referred to here as circuit breakers, in detail according to the preamble of claim 1.
  • the trigger comes into engagement with the switch lock of the circuit breaker by means of a drive when it is started ,
  • Undervoltage releases are used to switch off circuit breakers when a specified operating voltage is undershot or fails in order to avoid dangerous operating states when the operating voltage returns due to starting machines. They are usually mechanically attached to the outside of the circuit breaker and coupled to the switching mechanism of the circuit breaker.
  • a spring is generally used as the drive and is held under tension by an electromagnet. If the operating voltage drops below a predetermined value, the electromagnet drops and releases the spring, which normally opens the latch of the connected circuit breaker and thereby switches it off. When switching on again after the voltage recovery, the spring of the undervoltage release is tensioned and the electromagnet keeps the spring in its tensioned position. If an attempt is made to switch on the circuit breaker as long as sufficient operating voltage is not available, the electromagnet does not pull in and the spring keeps the latch of the circuit breaker open. Switching on is therefore not possible.
  • the switch-off is not effected by an impulse, but by the application of permanent voltage to the connections of the shunt release.
  • a solenoid coil is used which is voltage-proof against permanent voltage or an auxiliary contact is installed inside the shunt release, which interrupts the coil circuit after the circuit breaker has been switched off.
  • the invention has for its object to develop a universal release that is suitable as undervoltage release and shunt release and in which the disadvantages described are avoided.
  • the drive is in principle a piezoceramic bending strip, which in the absence of the operating voltage, in the version as undervoltage release, or in the case of derived voltage, in the version as shunt release, by its bending or bending back into the circuit breaker of the circuit breaker engages in a unlatching manner.
  • the drive is in principle a piezoceramic bending strip, which in the absence of the operating voltage, in the version as undervoltage release, or in the case of derived voltage, in the version as shunt release, by its bending or bending back into the circuit breaker of the circuit breaker engages in a unlatching manner.
  • a single trigger that eliminates the known variants described.
  • One of the advantages is that constant energy consumption and heat generation are avoided.
  • the release does not have to be assigned a separate switch lock in order to open auxiliary contacts and to interrupt a coil circuit.
  • the trigger is brought into engagement with the switch lock of the circuit breaker.
  • the drive is again a piezoceramic bending strip, which, under an applied voltage, which is derived from the working current, engages in the circuit breaker of the circuit breaker by unlatching it.
  • the drive can in principle be a piezoceramic bending strip which, when the operating voltage is applied, is disengaged due to its bending out
  • Switch lock of the circuit breaker is.t and held at.
  • the operating voltage drops below a voltage threshold by bending back into the circuit breaker of the circuit breaker, this interlocks.
  • the trigger can also be designed so that it is immediately suitable for both determinations, optionally by corresponding deflection members and differently shaped action members for both determinations. It may also be sufficient to attach the trigger at a suitable location.
  • a voltage generator can be connected to the piezoceramic bending strip in order to provide a suitable voltage for bending out the bending strip.
  • the voltage generator can be provided with a mains connection for installation AC voltage and can have a rectifier with a smoothing capacitor in order to provide the required DC voltage for the piezoceramic bending strip.
  • the trigger can, on the other hand, be provided with a voltage generator with a mains connection for AC voltage lower than the installation voltage of a supply network and can have a voltage multiplier with a rectifier circuit. This means that the release can also be operated with an AC voltage lower than the usual mains voltage.
  • the trigger can have a voltage generator with a mains connection for DC voltage, in particular for a DC voltage that is smaller than the installation voltage. voltage and accordingly have an AC voltage generator with a voltage multiplier and rectifier circuit.
  • a bus from building system technology can serve as a voltage generator, which, in addition to providing information, also supplies energy for supplying the electronics to subscriber stations.
  • a special supply line is not required.
  • the bus for replacing a separate voltage generator can advantageously be the bus of the European Installation Bus Association.
  • FIG. 1 shows a trigger with a piezoceramic bending strip, which can operate as an operating voltage with a conventional mains voltage of 230 volts AC. It has a rectifier circuit and, in the exemplary embodiment, a smoothing capacitor, which can also be dispensed with.
  • FIG. 2 illustrates a trigger with a piezoceramic bending strip which can be operated with a low AC voltage, for example of 24 volts, a voltage multiplier circuit and a rectifier circuit which provides the high voltage required for the operation of the piezoceramic bending strip.
  • FIG. 3 illustrates a trigger that can be operated with a low DC voltage, for example of 24 volts, the DC voltage being converted to AC voltage in an AC voltage generator and increased in a voltage multiplier circuit and in a downstream rectifier circuit in DC voltage for operating the Piezoceramic bending strip is converted.
  • a low DC voltage for example of 24 volts
  • Such circuits can be made very small, since the piezoceramic bending strip has extremely low energy requirements.
  • the trigger according to FIG 1 can be determined as an undervoltage release or shunt release. Its piezoceramic bending strip 1 is connected to a voltage generator 2, which in the exemplary embodiment according to FIG. 1 is provided with a mains connection 3 for alternating installation voltage of, for example, 230 volts. In the exemplary embodiment, the voltage generator has a rectifier circuit 4 and a smoothing capacitor 5.
  • the trigger can be activated by means of a drive, which here is the piezoceramic bending strip 1, when it is engaged in connection with the switching lock; of a circuit breaker to be loaded.
  • the piezoceramic bending strip 1 is bent back into the switch lock of a circuit breaker by engaging it in a detaching manner.
  • the piezoceramic bending strip 1 acts similarly to a conventional bimetallic strip. In the case of the piezoceramic bending strip, a sufficiently high voltage is used to deflect it to a useful extent, so that a latch can be released or unlatched.
  • Piezo-ceramic bending strips are, for example, under the type designation "Piezoelectric Ceramics Parallel Bimorph Elements", order no. 4322020-1453 to -1462, offered by Philips on the market.
  • a piezoceramic bending strip can be about 35 mm
  • Such an element has a deflection of 935 ⁇ ⁇ 20% with a free length of 30 mm when a voltage of 300 volts DC is applied. The approximately 1 mm deflection is sufficient to release a latch of common circuit breakers. The " current consumption of such an element is negligible since it behaves electrically like a capacitor. Its capacity is approximately 24 nF. All additional circuits, for example in the voltage generator 2, can be made very small due to the extremely low energy requirement of the piezoceramic bending element.
  • FIG. 2 shows a release with a mains connection 3 for an AC voltage lower than that of a conventional installation voltage.
  • Its voltage generator 2 has a voltage multiplier circuit 7 and a downstream rectifier circuit 4.
  • a smoothing capacitor 5 is again provided.
  • a trigger is illustrated which is provided with a voltage generator 2 with a mains connection 3 for DC voltage less than that of a conventional installation voltage.
  • the DC voltage at the mains connection 3 can be 24 volts, DC voltage, for example.
  • the voltage generator has an AC voltage generator 8, a downstream voltage multiplier cherscrien 7 and a downstream rectifier circuit 4.
  • a bus of building system technology can be connected to its power supply when the bus except for information and energy leads to supply the electronics of subscriber stations.
  • the generally low DC voltage can then be processed by a voltage generator of the type shown in FIG. 3 and made usable for the piezoceramic bending strip 1.
  • the bus of the European Installation Bus Association is advantageously suitable as a bus for supplying the voltage generator 2, for example via its network connection 3. '
  • a chopper circuit is suitable as the AC voltage generator 8 in the voltage generator 2 according to FIG.
  • DC voltage circuits and voltage multiplier circuits are common in a wide variety of designs.

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  • Direct Current Feeding And Distribution (AREA)

Abstract

L'invention concerne un déclencheur, tel qu'un déclencheur à minimum de tension ou un déclencheur à courant de travail, notamment pour disjoncteur ou disjoncteur de protection de circuit, désignés ici par le terme disjoncteur. Selon la présente invention, ce déclencheur entre en prise avec le mécanisme de verrouillage du disjoncteur, au moyen d'un entraînement dès la mise en marche de ce dernier. Ledit entraînement est en principe une bande flexible (1) en piézocéramique, qui, en cas de panne de tension de service ou de tension dérivé, s'engage par sa courbure dans le mécanisme de verrouillage du disjoncteur pour déverrouiller ce dernier.
PCT/DE2001/004560 2000-12-19 2001-12-05 Declencheur pour disjoncteur WO2002050856A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10063304.8 2000-12-19
DE10063304 2000-12-19

Publications (1)

Publication Number Publication Date
WO2002050856A1 true WO2002050856A1 (fr) 2002-06-27

Family

ID=7667795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/004560 WO2002050856A1 (fr) 2000-12-19 2001-12-05 Declencheur pour disjoncteur

Country Status (1)

Country Link
WO (1) WO2002050856A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473859A (en) * 1982-09-22 1984-09-25 Piezo Electric Products, Inc. Piezoelectric circuit breaker
EP0548731A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut et/ou à courant différentiel
EP0548732A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut
EP1014412A2 (fr) * 1998-12-24 2000-06-28 ABB Ricerca SpA Dispositif bistable de commande
WO2000064022A1 (fr) * 1999-04-19 2000-10-26 Pbt (Ip) Limited Mecanisme de commutation electrique de faible puissance a matiere active et circuit de commande destine a ce dernier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473859A (en) * 1982-09-22 1984-09-25 Piezo Electric Products, Inc. Piezoelectric circuit breaker
EP0548731A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut et/ou à courant différentiel
EP0548732A2 (fr) * 1991-12-24 1993-06-30 ABBPATENT GmbH Disjoncteur à courant de défaut
EP1014412A2 (fr) * 1998-12-24 2000-06-28 ABB Ricerca SpA Dispositif bistable de commande
WO2000064022A1 (fr) * 1999-04-19 2000-10-26 Pbt (Ip) Limited Mecanisme de commutation electrique de faible puissance a matiere active et circuit de commande destine a ce dernier

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