EP0548732A2 - Disjoncteur à courant de défaut - Google Patents

Disjoncteur à courant de défaut Download PDF

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Publication number
EP0548732A2
EP0548732A2 EP92121254A EP92121254A EP0548732A2 EP 0548732 A2 EP0548732 A2 EP 0548732A2 EP 92121254 A EP92121254 A EP 92121254A EP 92121254 A EP92121254 A EP 92121254A EP 0548732 A2 EP0548732 A2 EP 0548732A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
switch
trigger
residual current
signal
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
EP92121254A
Other languages
German (de)
English (en)
Other versions
EP0548732B1 (fr
EP0548732A3 (fr
Inventor
Erhard Runtsch
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0548732A2 publication Critical patent/EP0548732A2/fr
Publication of EP0548732A3 publication Critical patent/EP0548732A3/xx
Application granted granted Critical
Publication of EP0548732B1 publication Critical patent/EP0548732B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H57/00—Electrostrictive relays; Piezoelectric relays
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer

Definitions

  • the invention relates to a residual current circuit breaker according to the preamble of claim 1.
  • two-pole residual current circuit breakers detect a residual current in the AC circuit via a summation current transformer, which compensates for the permanent flux in a permanently magnetically biased magnetic circuit via a secondary winding assigned to the summation current transformer and releases an armature biased by a spring force, which travels a certain distance, unlatches the switching mechanism of the residual current circuit breaker and the main contacts opens.
  • the permanently magnetically biased magnetic circuit is usually a U-shaped trigger that has a permanent magnet and an armature, the permanent magnet holding the armature on the yoke until a fault current occurs and generates a magnetic flux that counteracts the permanent flux generated by the permanent magnet, so that a preloaded spring releases the armature from the yoke.
  • the trigger can only be biased with a correspondingly low energy, and a slight increase in the adhesive forces at the armature contact point in the air gap can lead to zero sticking of the armature, even with compensated magnetic flux, so that tripping is omitted and the faulty situation in the operating circuit remains.
  • the object of the invention is to provide a residual current circuit breaker in which the trigger reliably releases the latch of the switch lock.
  • a particularly advantageous embodiment can be designed to form the element as a bending strip clamped on one side or as a disk bender or as a linearly deflecting actuator, the free end of which acts on the latching point.
  • the trigger can have a switch which can be controlled by the signal on the secondary side and which is located in one of the outgoing conductors to the element and from there to Cable carrying earth; if the secondary signal occurs, then the switch is activated and closed, so that the element is supplied with mains voltage.
  • a sufficient operating voltage and, moreover, a sufficient deflection of the element for direct action on the switching mechanism can be generated, as well as a sufficient force for opening the switching mechanism.
  • the piezoceramic element is a type of capacitor that is charged for tripping, but must be discharged before each new loading, i.e. before each new triggering.
  • an advantageous embodiment of the invention is characterized in that a switching element is arranged electrically parallel to the electrical connection points of the element, which is already driven during the opening process of the contact points or at the latest during switching on (closing of the contact points), driven by the switching lock or by a coupling element the key switch and the contact points, closes and short-circuits the connection points of the element at least briefly.
  • the discharge is then carried out by closing the connection points of the element by means of a switching element, which can take place when the switch goes into the off position or is switched on.
  • the switching element can be, for example, a wiping contact or the like.
  • An advantageous embodiment of the invention can be such that the trigger is dimensioned such that it only responds above a certain, permissible touch voltage.
  • Electrostrictive materials have the piezo effect; they are deflected when a certain voltage is applied. It will refer to the literature in this context "Physics in our time", 1976, page 48 below, in which it is pointed out that so-called piezoelectric relays can be produced with piezo elements in which a strip-shaped piezo element, at the free end of which there are contacts, under the effect of an omega -shaped spring and an electrical voltage moves the contact pieces from one fixed contact point to another fixed contact point and back again. Further applications of such piezo elements can be found, for example, in US Pat. No. 2,835,761 or DE-OS 29 12 734.
  • FIG. 1 shows a fault current protection circuit arrangement for a network 10 consisting of an outgoing conductor L and a return conductor N.
  • a network 10 consisting of an outgoing conductor L and a return conductor N.
  • the forward and return conductor is guided as a primary winding through a toroidal core converter 13, which also has a secondary winding 14 which is connected to a trigger designed as a piezo element 15.
  • the trigger 15 is preferably designed as a strip-shaped element which acts according to the dashed lines 16 on a switching lock 17 so that it is released and can open contact points 18 and 19 located in the network.
  • the operating voltage for the trigger 15 is sufficient; it must be approximately 50 volts.
  • the deflection of the trigger for direct action on the switch lock should be sufficiently large, the force for opening the switching mechanism also being sufficient.
  • the switching mechanism data such as the latching distance and latching force are optimized, a smaller latching path and a higher latching force having to be achieved.
  • Such voltage doubler circuits are generally known.
  • FIG. 2 An embodiment as shown in FIG. 2 can be used.
  • the secondary winding is connected to a preferably permanently magnetically biased relay. From the power line L (outgoing line L), a line 21 leads to earth, in which a switch 22 and an element 23 corresponding to the element 15 is switched on. Normally, if there is no fault current, the switch 22 is open. If a secondary signal is present on the secondary winding 14 due to a difference between the current in the outgoing conductor and return conductor, the relay 20 is actuated and the switch 22 is closed.
  • element 23 which can be a strip or slide bender, which is sufficient in any case to achieve a suitable deflection of element 23 for unlatching switch lock 17.
  • the switch 22 can also be a thyristor, the gate of which is connected to the relay 20.
  • the piezo element 15 is a capacitor which is charged for tripping.
  • the piezo element must be discharged after each deflection process.
  • Figure 1 shows an arrangement of how this could be done.
  • the piezo element 15 is connected to the secondary winding 14 via a connection point 30 and 31.
  • a discharge circuit 32 in which a switching element 33 is located, is connected to the connection points 30 and 31.
  • the switching element 33 is electrically connected in parallel to the connection points 30 and 31. If the switching lock 17 is released, then the unlatching process also acts on the switching element 33, so that it is closed when the switching element is switched off. This causes the piezo element 15 to discharge.
  • the discharge circuit is of course also to be provided in the piezo element 23 of FIG. 2.
  • the piezo element 23 is connected at one end to ground potential.
  • a residual current circuit breaker is snapped onto a top-hat rail in an installation system; this top-hat rail can serve as earth potential, and since only the voltage potential has to be present, such a "high-resistance connection" is sufficient.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
EP92121254A 1991-12-24 1992-12-14 Disjoncteur à courant de défaut Expired - Lifetime EP0548732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142969 1991-12-24
DE4142969A DE4142969A1 (de) 1991-12-24 1991-12-24 Fehlerstromschutzschalter

Publications (3)

Publication Number Publication Date
EP0548732A2 true EP0548732A2 (fr) 1993-06-30
EP0548732A3 EP0548732A3 (fr) 1994-01-26
EP0548732B1 EP0548732B1 (fr) 1996-05-01

Family

ID=6448134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121254A Expired - Lifetime EP0548732B1 (fr) 1991-12-24 1992-12-14 Disjoncteur à courant de défaut

Country Status (3)

Country Link
EP (1) EP0548732B1 (fr)
AT (1) ATE137604T1 (fr)
DE (2) DE4142969A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902516A2 (fr) * 1997-09-11 1999-03-17 ABBPATENT GmbH Disjoncteur à courant de défaut
EP1008124A2 (fr) * 1997-04-08 2000-06-14 Medicor Corporation Dispositif et procede d'essai d'isolation electrique pour instruments electrochirurgicaux
EP1014413A2 (fr) * 1998-12-24 2000-06-28 ABB Ricerca SpA Circuit de commande électronique pour dispositif bistable de commande
WO2002050856A1 (fr) * 2000-12-19 2002-06-27 Siemens Aktiengesellschaft Declencheur pour disjoncteur
EP1241698A2 (fr) * 2001-03-15 2002-09-18 Heinrich Kopp Ag Dispositif de commande pour un mécanisme de déclenchement
WO2005024879A1 (fr) * 2003-08-29 2005-03-17 Siemens Aktiengesellschaft Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4443520A1 (de) * 1994-12-07 1996-06-13 Abb Patent Gmbh Fehlerstromschutzschalter
DE102006018669A1 (de) * 2006-04-21 2007-07-05 Siemens Ag Elektromechanische Schaltvorrichtung

Citations (3)

* 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
EP0285594A1 (fr) * 1987-04-02 1988-10-05 Felten & Guilleaume Austria Ag Interrupteur de protection à courant de défaut avec délais de temps bref
EP0412401A2 (fr) * 1989-08-10 1991-02-13 Siemens Aktiengesellschaft Disjoncteur rapide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835761A (en) * 1953-05-25 1958-05-20 Electric Machinery Mfg Co Electrostrictive ceramic actuator
DE1463583A1 (de) * 1964-03-17 1969-03-27 Siemens Ag Anordnung zur Steuerung oder Festlegung der Ansprech-und Abfallzeiten piezoelektrischer Relais
SU1513561A1 (ru) * 1986-05-23 1989-10-07 Всесоюзный научно-исследовательский институт электрификации сельского хозяйства Устройство дл защиты от повреждени в трехфазных электроустановках
SU1686575A1 (ru) * 1989-07-14 1991-10-23 Душанбинское Проектно-Конструкторское Технологическое Бюро "Системавтоматика" Устройство дл защитного отключени сети переменного тока при утечке тока на землю
JPH06248220A (ja) * 1993-02-23 1994-09-06 San Chitsupu:Kk 無毒性固形画材組成物

Patent Citations (3)

* 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
EP0285594A1 (fr) * 1987-04-02 1988-10-05 Felten & Guilleaume Austria Ag Interrupteur de protection à courant de défaut avec délais de temps bref
EP0412401A2 (fr) * 1989-08-10 1991-02-13 Siemens Aktiengesellschaft Disjoncteur rapide

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1008124A2 (fr) * 1997-04-08 2000-06-14 Medicor Corporation Dispositif et procede d'essai d'isolation electrique pour instruments electrochirurgicaux
EP1008124A4 (fr) * 1997-04-08 2000-07-19 Medicor Corp Dispositif et procede d'essai d'isolation electrique pour instruments electrochirurgicaux
EP0902516A2 (fr) * 1997-09-11 1999-03-17 ABBPATENT GmbH Disjoncteur à courant de défaut
EP0902516A3 (fr) * 1997-09-11 2000-05-10 ABBPATENT GmbH Disjoncteur à courant de défaut
EP1014413A2 (fr) * 1998-12-24 2000-06-28 ABB Ricerca SpA Circuit de commande électronique pour dispositif bistable de commande
EP1014413A3 (fr) * 1998-12-24 2001-12-12 ABB Ricerca SpA Circuit de commande électronique pour dispositif bistable de commande
WO2002050856A1 (fr) * 2000-12-19 2002-06-27 Siemens Aktiengesellschaft Declencheur pour disjoncteur
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
WO2005024879A1 (fr) * 2003-08-29 2005-03-17 Siemens Aktiengesellschaft Declencheur de protection contre le court-circuit et la surcharge pour dispositif de commutation

Also Published As

Publication number Publication date
EP0548732B1 (fr) 1996-05-01
EP0548732A3 (fr) 1994-01-26
DE59206179D1 (de) 1996-06-05
DE4142969A1 (de) 1993-07-01
ATE137604T1 (de) 1996-05-15

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