WO2007045374A1 - Dispositif pour limiter un courant - Google Patents

Dispositif pour limiter un courant Download PDF

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Publication number
WO2007045374A1
WO2007045374A1 PCT/EP2006/009757 EP2006009757W WO2007045374A1 WO 2007045374 A1 WO2007045374 A1 WO 2007045374A1 EP 2006009757 W EP2006009757 W EP 2006009757W WO 2007045374 A1 WO2007045374 A1 WO 2007045374A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
busbar
fault
power
current limiter
Prior art date
Application number
PCT/EP2006/009757
Other languages
German (de)
English (en)
Inventor
Andreas Schumacher
Original Assignee
Moeller 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 Moeller Gmbh filed Critical Moeller Gmbh
Priority to AT06806134T priority Critical patent/ATE470946T1/de
Priority to DK06806134.0T priority patent/DK1938351T3/da
Priority to DE502006007193T priority patent/DE502006007193D1/de
Priority to EP06806134A priority patent/EP1938351B1/fr
Publication of WO2007045374A1 publication Critical patent/WO2007045374A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/201—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other abnormal electrical condition being an arc fault
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means

Definitions

  • the invention relates to a device for limiting a short circuit current caused by a system fault (for example, by an arc fault) in an electrical switching or distribution system.
  • the device should be usable for low and medium voltage.
  • the interruption device comprises a detection device for detecting the Anlag- Ergen or the arc fault in the sense of a fault detection device, a single-phase line disconnector in at least one power current path and an activatable current limiter for a guided in the power current flow.
  • Arc flashes can lead to extreme property damage, but also personal injury. To limit the damage in addition to a quick detection of the error and the rapid shutdown (deletion) of the arc and / or limitation of the current required.
  • Various solutions are state-of-the-art for the rapid detection of a fault.
  • Various physical parameters of a switchgear or of a power distributor can be detected when an arc fault occurs by means of a suitable sensor. For example, this can be done via the coupling of the light of the arc fault into photoactive elements (DE 30 31 517 A1), wherein the light is converted opto-elec- tronically in a corresponding switching command to a circuit breaker and this separates the system from the network.
  • Faulty disconnecting fuses on the line side (before an arc fault extinction) generate an arc that can not be effectively interrupted by an off-line, slow-acting circuit-breaker. Furthermore, fuses are unusable after each triggering and must be replaced. Costs for such backups are high.
  • I s- limiter For medium-voltage applications, a device called an I s- limiter has been known for more than 40 years and accordingly has often been described. Representative of this is to be referred to DE 199 55 682 A1 to a device for high voltage.
  • the working principle is that a fuse - for example, by a fuse - the short-circuit current in the first increase in current in the first half-wave is limited and then interrupted.
  • Low-voltage systems in contrast to medium-voltage systems, have particularly high operating currents. While hardly any currents above 5,000 A occur at medium and high voltage, currents of more than 100 kA can occur in low-voltage systems. For the use of a current limiter and / or switching off a short circuit, there is therefore the problem of the current steepness associated with overvoltages, especially in the case of inductive loads.
  • the solution of the problem can be found in the main claim. Further refinements are formulated in the subclaims.
  • the device includes a detection device for the fault current, which activates a current limiter for a guided in the power flow operating current upon detection.
  • the current limiter is arranged in parallel circuit position to the line separator, wherein after line separation of the current limiter is able to perform for more than a half-wave, preferably for several half cycles of the alternating current, a reduced operating current.
  • features of the invention include that the line disconnector has a switching time for the disconnection of the power current path of less than 5 ms and that the current limit of the current limiter is designed for a current that is smaller than a pre-definable short-circuit current or limited to a current strength, in which a fault arc extinguished.
  • the line disconnector is placed in the disconnection point where the busbar is to be severed in less than 5 ms.
  • the current After disconnecting the conductor through the line disconnector, the current commutates into the parallel current path in which the current limiter is present.
  • the reduction of the operating current can be adjusted by the current limiter such that a predeterminable residual current intensity is undershot, for example to 100 A operating current.
  • a preferred setting may be such a current, which is below a burning intensity which does not permit an independent burning of an arc fault at the driving voltage. From detailed studies, the relationship between driving voltage and extinction and / or continuation of the burning of the arc fault is very accurately known, so that the setting of the current limiter is precisely adjustable.
  • a separation point is provided, the beginning and end of which is connected to a current limiter in parallel
  • the line separator should be designed as a mechanical cutting device, with the power flow path can be separated.
  • switchgear and Stromvermaschinem power lines are mostly designed as a busbars, so that it should be in the context of the invention here is a cutting device, which is adapted to separate the flow path.
  • the line separator can be designed so that it is a pyrotechnically driven cutting device.
  • the cutting device can be designed as a pyrotechnic cutting charge. Suitable pyrotechnic cutting charges are commercially available and are described in an example also in EP 0052521 A1.
  • the squib is designed in the form of a linearly shaped charge with an elongated explosive body. The explosive is mounted across the busbar extension, so that the explosive body cuts through the busbar in full width.
  • the current limiter can each be a current limiter designed according to the following technology: it can be a liquid metal current limiter, a PTC thermistor or, if technologically applicable for a given electrical system, a thyristor as well.
  • a liquid metal current limiter which is to be installed in a horizontal position, be used when the busbars are also horizontal, so that the current limiters come to lie flat on the busbars.
  • a circuit breaker With the detection of an arc fault and the release of the separation device, a circuit breaker can be applied in parallel. With the tripping of the circuit breaker the operating current can finally be switched off.
  • the position of the circuit breaker - whether on the mains side before the disconnecting device and / or behind the disconnecting device - should be dependent on the type and structure of the electrical system.
  • the device according to the invention can also be configured so that in the switching or distribution system, a load shedding control is present, which is also activated by the detection device (for the fault current).
  • a load shedding control is present, which is also activated by the detection device (for the fault current).
  • the load shedding control can be set up so that after a given priority certain consumers are disconnected from the grid and other loads continue to operate.
  • the disconnecting device After a fault, the disconnecting device must be replaced.
  • the device according to the invention is set up in such a way that it has connecting points with the busbars in front of and behind a location where the disconnecting device can be connected on both sides to a rail section via bolts.
  • More than one cutting charge at the intended location of the separation of the conductor rail can be arranged, if a particularly wide and therefore safe separation distance is to be generated. This avoids that a switching arc occurs in a too narrow separation distance and thus reduces the effect of the separator.
  • the device Since the use of a pyrotechnic cutting charge metal components of the busbar are replaced and exhaust gases from the pyrotechnic device occur, measures should be taken ; which serve the shielding - in particular to avoid personal injury. Thereafter, it is proposed that the device is designed as a structural unit with housing, which has a refractory lining and at least one outlet opening for an exhaust gas stream.
  • the lining may for example consist of plates made of glass fiber reinforced plastic.
  • FIG. 1 Structure of a device with two cutting charges and a liquid metal current limiter.
  • the single figure shows schematically the structure of a device according to the invention. It is indicated a designed as a power rail power flow path 10, on which a line separator 20 is mounted.
  • a rail section 16 is formed, which is.
  • a rail section 16 is formed, which is.
  • Beginning and end of the rail section 16 each have connection points 18, where the rail section 16 is connected to the busbars via bolts.
  • the joints should be designed so that access and extraction is best possible from the bottom of the device.
  • the device should be housed in a housing 60, which is shown schematically here.
  • a current limiter 30 is provided, which is preferably mounted outside of the addressed housing 60.
  • the figure shows a single-phase arrangement.
  • the device may also be formed in three phases, so that a bus bar 10 is present per phase and each bus bar is provided with a separator 20.
  • the current through the busbar is designated h.
  • the current I 2 in the parallel current path has no significance for the normal operation of the switchgear. After the separation of the busbar, the full operating current I 1 briefly flows through the current limiter, which then reduces the current to a predeterminable value or below a predeterminable value b.
  • the separating device is triggered, wherein the rail section 16 is cut at at least one point 24. This creates a separation line.
  • a plurality of cutting charges 22 can be mounted side by side on the rail section 16 and thus several separation points 24 are generated, or that the total length of the separation point is made sufficiently large.
  • the rail section is supported on the side facing away from the cutting charge by abutments 26, 26 '. In any case, the rail section should be supported on both sides of the intended separation point 24. In individual cases, it must be checked whether a center support 26 'is necessary or not in the middle between two possible separation points. In the figure, it is indicated that two pyrotechnic cutting charges 22 are mounted side by side on the rail section 16. A cutting load is placed across the full width of the rail section 16 on the rail section 16.
  • the location and number of the cutting charges determine location and number of separation points 24.
  • the possible separation point in the rail section does not need to be mechanically designed particularly. However, it may well be useful - without reducing the line cross section of the rail section - to provide perforations (for example bores) at the location of a possible separation point, so that a type of predetermined breaking point for the pyrotechnic sprinkling is pre-stamped there.
  • Commercially available cutting loads e.g., under the trademark Dynawell
  • the structure according to the invention according to the figure consists of two pyrotechnic cutting charges 22 and a liquid metal current limiter 30, in which a plurality of compressor chambers 32 and the liquid metal surface are indicated.
  • two outlet openings 62 for an exhaust gas stream 64 are shown in the housing 60.
  • the current limiter 30 is fastened by means of its own busbars 12 to the busbars 10 which form the power circuit, with connecting elements, not shown.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Control Of Eletrric Generators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne un dispositif qui sert à limiter un courant d'erreur produit par un arc électrique parasite dans un système de commutation ou de distribution électrique, et à limiter et/ou interrompre l'arc électrique parasite. Le dispositif comprend un système de détection d'erreur, un séparateur de puissance monophasé (20) dans au moins une trajectoire de courant de puissance (10), et un limitateur de courant activable (30) destiné à un courant acheminé par la trajectoire de courant de puissance. Selon l'invention, le limitateur de courant (30) est connecté en parallèle du séparateur de puissance (20), le séparateur de puissance (20) a un temps de commutation pour la séparation de la trajectoire de courant de puissance (10), inférieur à 5 ms, et la limitation de courant du limitateur de courant (30) est appliquée à une intensité de courant qui est inférieure à un courant d'erreur qui peut être prédéterminé, ou limitée à une intensité de courant pour laquelle un arc électrique s'éteint.
PCT/EP2006/009757 2005-10-19 2006-10-10 Dispositif pour limiter un courant WO2007045374A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT06806134T ATE470946T1 (de) 2005-10-19 2006-10-10 Vorrichtung zur strombegrenzung
DK06806134.0T DK1938351T3 (da) 2005-10-19 2006-10-10 Anordning til strømbegrænsning
DE502006007193T DE502006007193D1 (de) 2005-10-19 2006-10-10 Vorrichtung zur strombegrenzung
EP06806134A EP1938351B1 (fr) 2005-10-19 2006-10-10 Dispositif pour limiter un courant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005050044A DE102005050044A1 (de) 2005-10-19 2005-10-19 Vorrichtung zur Strombegrenzung
DE102005050044.7 2005-10-19

Publications (1)

Publication Number Publication Date
WO2007045374A1 true WO2007045374A1 (fr) 2007-04-26

Family

ID=37546617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/009757 WO2007045374A1 (fr) 2005-10-19 2006-10-10 Dispositif pour limiter un courant

Country Status (5)

Country Link
EP (1) EP1938351B1 (fr)
AT (1) ATE470946T1 (fr)
DE (2) DE102005050044A1 (fr)
DK (1) DK1938351T3 (fr)
WO (1) WO2007045374A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529210A (en) * 1967-02-28 1970-09-15 Mitsubishi Electric Corp Current limiting circuit
US5360999A (en) * 1993-02-25 1994-11-01 Board Of Regents, The University Of Texas System Explosively actuated thermal opening switch
DE19601540A1 (de) * 1995-05-12 1996-11-14 Mitsubishi Electric Corp Schaltungsunterbrecher und Schaltungsunterbrechungsvorrichtung
DE19615959C1 (de) * 1996-04-22 1997-10-16 Siemens Ag Verfahren und System zur Optimierung und zum Management des Verbrauches an elektrischer Energie in Industriebetrieben
US5867356A (en) * 1997-11-05 1999-02-02 General Electric Company Current limiting system and method
EP0929090A2 (fr) * 1998-01-08 1999-07-14 Harness System Technologies Research, Ltd. Disjoncteur
WO2001086683A1 (fr) * 2000-05-12 2001-11-15 Human El-Tech, Inc Interrupteur de circuit de defaut d'arc et disjoncteur dote dudit interrupteur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097016B (de) * 1955-01-15 1961-01-12 Calor Emag Elektrizitaets Ag Einrichtung zur Schnellunterbrechung von Kurzschlussstroemen
DE2039065A1 (de) * 1970-08-06 1972-02-17 Kind Dieter Prof Dr Ing Verfahren und Anordnungen zur strombegrenzenden Unterbrechung von Gleich- und Wechselstroemen hoher Spannung
SE7907340L (sv) * 1979-09-04 1981-03-05 Asea Ab Anordning for detektering av ljusbagar o dyl
DE29614976U1 (de) * 1996-08-28 1996-11-21 N & L Elektrotechnik GmbH, 63791 Karlstein Notabschaltvorrichtung für Bordstromnetze von Kraftfahrzeugen
DE19746566A1 (de) * 1997-10-22 1999-04-29 Kloeckner Moeller Gmbh Kurzschließer, insbesondere für eine Störlichtbogen-Schutzvorrichtung zur Verwendung in Anlagen zur Verteilung elektrischer Energie
US6222439B1 (en) * 1998-02-17 2001-04-24 Sumitomo Wiring Systems, Ltd. Circuit breaking device
DE19903940C1 (de) * 1999-02-01 2000-11-02 Moeller Gmbh Selbsterholende Strombegrenzungseinrichtung mit Flüssigmetall
DE19903837B4 (de) * 1999-02-01 2004-02-19 Moeller Gmbh Selbsterholende Strombegrenzungseinrichtung mit Flüssigmetall
DE19955682A1 (de) * 1999-11-19 2001-06-13 Abb Patent Gmbh Strombegrenzende Einrichtung für Hochspannung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529210A (en) * 1967-02-28 1970-09-15 Mitsubishi Electric Corp Current limiting circuit
US5360999A (en) * 1993-02-25 1994-11-01 Board Of Regents, The University Of Texas System Explosively actuated thermal opening switch
DE19601540A1 (de) * 1995-05-12 1996-11-14 Mitsubishi Electric Corp Schaltungsunterbrecher und Schaltungsunterbrechungsvorrichtung
DE19615959C1 (de) * 1996-04-22 1997-10-16 Siemens Ag Verfahren und System zur Optimierung und zum Management des Verbrauches an elektrischer Energie in Industriebetrieben
US5867356A (en) * 1997-11-05 1999-02-02 General Electric Company Current limiting system and method
EP0929090A2 (fr) * 1998-01-08 1999-07-14 Harness System Technologies Research, Ltd. Disjoncteur
WO2001086683A1 (fr) * 2000-05-12 2001-11-15 Human El-Tech, Inc Interrupteur de circuit de defaut d'arc et disjoncteur dote dudit interrupteur

Also Published As

Publication number Publication date
EP1938351B1 (fr) 2010-06-09
ATE470946T1 (de) 2010-06-15
EP1938351A1 (fr) 2008-07-02
DE502006007193D1 (de) 2010-07-22
DE102005050044A1 (de) 2007-05-03
DK1938351T3 (da) 2010-09-27

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