EP0382134A1 - Sicherheitsvorrichtung für elektrisches Gerät mit dielektrischem Gas, insbesondere für Lastschalter oder Messreduktoren - Google Patents

Sicherheitsvorrichtung für elektrisches Gerät mit dielektrischem Gas, insbesondere für Lastschalter oder Messreduktoren Download PDF

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Publication number
EP0382134A1
EP0382134A1 EP90102196A EP90102196A EP0382134A1 EP 0382134 A1 EP0382134 A1 EP 0382134A1 EP 90102196 A EP90102196 A EP 90102196A EP 90102196 A EP90102196 A EP 90102196A EP 0382134 A1 EP0382134 A1 EP 0382134A1
Authority
EP
European Patent Office
Prior art keywords
photo
enclosure
arc
generator
wall
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
EP90102196A
Other languages
English (en)
French (fr)
Other versions
EP0382134B1 (de
Inventor
Edmond Thuries
Jean-Pierre Dupraz
Jean-Paul Moncorge
Jean-Marc Willieme
Joseph Martin
Yves Perrusset
Didier Taponat
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0382134A1 publication Critical patent/EP0382134A1/de
Application granted granted Critical
Publication of EP0382134B1 publication Critical patent/EP0382134B1/de
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/26—Means for detecting the presence of an arc or other discharge

Definitions

  • the invention relates to a safety device for an enclosure containing electrical appliances and an insulating dielectric gas, such as sulfur hexafluoride, under a pressure of a few bars.
  • the invention is particularly applicable in the case where the enclosures are made of porcelain, such as the enclosures of circuit breakers.
  • the enclosures are made of porcelain, such as the enclosures of circuit breakers.
  • safety devices operating in the event of accidental overpressure.
  • the increase in pressure of the enclosure against which we want to protect is due to an internal arc; depending on the intensity of this arc, the rise in pressure to the aforementioned threshold value can vary from a few hundredths of a second for a high intensity arc to several seconds for a low intensity arc. In the latter case, by acting quickly by another means to tear the membrane, it is possible to avoid significant deterioration of the active parts of the device. This is the aim which the device of the invention proposes to achieve.
  • the subject of the invention is a safety device for an electrical appliance comprising an enclosure filled with pressurized gas, characterized in that it comprises a first means for detecting the appearance of an arc inside said enclosure and second means controlled by said first means for creating a passage for the gas through said enclosure when the first means has detected an arc for a given duration.
  • the first means is a photo-generator sensitive to the light of the arc such as a photo-battery, a photo-voltaic element.
  • said photo-generator is placed outside of said enclosure, to the right of a window made in the wall.
  • the second means is a striker comprising a percussion rod, a spring for operating said rod, a permanent magnet for holding said rod and a control winding supplied by said first medium, said rod being placed in line with a frangible part of the wall of said enclosure.
  • the second means is a core solenoid which strikes a breakable part of the wall of said enclosure.
  • the second means is a solenoid whose core constitutes a retractable stop for a counterweight pushed by a spring and placed in line with a breakable part of the wall of said enclosure.
  • the first means is a means sensitive to the heat given off by the arc.
  • the first means is a fuse.
  • the first means is a shape memory element.
  • the second means is advantageously a counterweight actuated by a banded spring whose relaxation is controlled by the modification of said second means under the effect of heat, said counterweight breaking a breakable portion of the wall of said enclosure.
  • FIG. 1 schematically represents a breaking chamber of a circuit breaker.
  • This chamber comprises a ceramic envelope 1 delimiting a volume 2 filled with a dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.
  • a dielectric gas such as sulfur hexafluoride
  • the chamber includes two end flanges 3 and 4.
  • the support casing for the fixed contacts is shown at 6 and at 5 the support support for the movable contacts and the blowing nozzle.
  • the flange 4 is provided with a first window closed by a translucent or transparent element 7, in front of which is placed, preferably outside the chamber, a photogenerator 8 emitting a current when it receives a light through window 7.
  • This photo-generator is for example a photo-battery or a photo-voltaic element.
  • the flange 4 has a second window 9 closed by a breakable element, such as a rupture plate, for example made of metal or of sintered material based on iron or graphite.
  • a breakable element such as a rupture plate, for example made of metal or of sintered material based on iron or graphite.
  • an electromagnetic striker On the flange 4 is fixed, by means of rods 20, an electromagnetic striker.
  • a striker is described in European Patent No. 107,167 filed October 18, 1983 in the name of the Applicant.
  • an envelope 12 made of soft iron material comprising an internal pillar 12A, a magnetic circuit 13, a cylindrical magnet 14 with radial magnetization, a magnetic core 15 extended by the percussion rod 11, a spring 16 and a coil 17 .
  • the spring When the striker is armed, the spring is kept bandaged, because the core 15 and the pillar 13 are attracted magnetically, the magnetic bonding force being greater than that of the springs.
  • the photo-generating element is electrically connected to the coil.
  • the operating precision can also be adjusted by associating the photo-generator with a timer filter, such as a capacitor 80 connected to its terminals.
  • the striker used in the aforementioned embodiment is very sensitive and is satisfied with the few milliwatts provided by a photo-battery or a photovoltaic element.
  • a more rudimentary electromechanical member such as an electromagnet 25 with a core 26 could be used, provided that, as shown in FIG. 3, the photo-generator is connected to an electronic door circuit 27 to allow the passage of a higher current supplied by an auxiliary source such as a battery.
  • FIG. 4 shows an embodiment in which a photo-detector such as a photo-resistance 30, connected to a door circuit 27 associated with a battery 28, feeds a small solenoid 31 whose core 32 serves as a stop for a counterweight 33 pushed by a spring 34.
  • a photo-detector such as a photo-resistance 30, connected to a door circuit 27 associated with a battery 28, feeds a small solenoid 31 whose core 32 serves as a stop for a counterweight 33 pushed by a spring 34.
  • the photo-resistance is here placed on the surface of window 7; as a variant, it could be placed inside the enclosure, which makes it possible to save a window such as 7.
  • the photo-resistance is replaced by a photo-diode also associated with a power supply and with a door circuit with time delay and controlling a striker or a solenoid.
  • the means for opening a gas passage in the enclosure in the event of a prolonged arc is an explosive, the firing of which is controlled by a time-delay detonator, supplied by the photo-generator.
  • a percussion element breaks a rupture member placed in the wall of the enclosure.
  • the rupture member will always be placed on one of the closing flanges of the envelope, this flange having to be considered within the meaning of the present patent as forming part of the wall of the 'pregnant.
  • the first element is sensitive to the heat given off by the arc.
  • It can be a fuse, or a shape memory element. It is then imperatively placed inside the envelope.
  • a fusible wire 40 maintains a counterweight 41, placed in line with a rupture member 42 of the wall of the enclosure, against the action of a spring 44.
  • the fuse is calibrated to only melt if the arc produces a rise in temperature greater than that produced during normal operation of the device.
  • the spring can, as a variant, be replaced by a deformable member under the action of heat, such as a shape memory member, the shape modification of which releases a weight pushed by a spring and placed in line with a breakable part of the wall of said enclosure.
  • a deformable member under the action of heat such as a shape memory member

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Breakers (AREA)
EP90102196A 1989-02-07 1990-02-05 Sicherheitsvorrichtung für elektrisches Gerät mit dielektrischem Gas, insbesondere für Lastschalter oder Messreduktoren Expired - Lifetime EP0382134B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8901538 1989-02-07
FR8901538A FR2642913B1 (fr) 1989-02-07 1989-02-07 Dispositif de securite pour appareil electrique a gaz dielectrique, notamment pour disjoncteurs ou reducteurs de mesure

Publications (2)

Publication Number Publication Date
EP0382134A1 true EP0382134A1 (de) 1990-08-16
EP0382134B1 EP0382134B1 (de) 1994-12-14

Family

ID=9378536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102196A Expired - Lifetime EP0382134B1 (de) 1989-02-07 1990-02-05 Sicherheitsvorrichtung für elektrisches Gerät mit dielektrischem Gas, insbesondere für Lastschalter oder Messreduktoren

Country Status (6)

Country Link
US (1) US5089931A (de)
EP (1) EP0382134B1 (de)
AT (1) ATE115764T1 (de)
DE (1) DE69014925T2 (de)
ES (1) ES2067574T3 (de)
FR (1) FR2642913B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482547B1 (de) * 1990-10-22 1996-01-03 Gec Alsthom Sa Schalter mit Lichtbogenerfassung
EP3696840A1 (de) * 2019-02-18 2020-08-19 ABB Schweiz AG Erdungsmechanismus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6229680B1 (en) 1999-08-16 2001-05-08 Eaton Corporation Apparatus and method for optically detecting arcing faults in electric power systems in the presence of other light sources
US7397012B2 (en) * 2005-05-31 2008-07-08 Thomas & Betts International, Inc. High current switch and method of operation
US7736529B2 (en) * 2007-10-12 2010-06-15 Honeywell International Inc Azeotrope-like compositions containing sulfur hexafluoride and uses thereof
US8408925B2 (en) * 2010-02-03 2013-04-02 Thomas & Betts International, Inc. Visible open for switchgear assembly
US8388381B2 (en) 2010-07-21 2013-03-05 Thomas & Betts International, Inc. Visible open for switchgear assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1079733B (de) * 1959-04-21 1960-04-14 Licentia Gmbh Schutzeinrichtung fuer Leistungs- oder Lasttrennschalter, insbesondere in gekapselten Schaltanlagen
FR2388391A1 (fr) * 1977-04-22 1978-11-17 Merlin Gerin Dispositif de signalisation pour poste blinde haute-tension
GB2011184A (en) * 1977-10-04 1979-07-04 Northern Eng Ind Earthing switch for high voltage metal-clad switchgear
FR2505051A1 (fr) * 1981-04-30 1982-11-05 Sprecher & Schuh Ag Installation electrique blindee avec dispositif de detection d'amorcage
DE3238000A1 (de) * 1982-06-07 1983-12-08 Sprecher & Schuh AG, 5001 Aarau, Aargau Lichtbogenanzeigevorrichtung fuer metallgekapselte hochspannungsschaltanlagen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719867A (en) * 1972-05-19 1973-03-06 Bbc Brown Boveri & Cie Explosion-proof lightning arrester including conductive liquid to expedite formation of external shunt path
US4001651A (en) * 1975-05-05 1977-01-04 Mcgraw-Edison Company Station lightning arrester with dual rupture diaphragms for gas pressure release
US4463405A (en) * 1981-02-19 1984-07-31 Electric Power Research Institute, Inc. Fail safe surge arrester
DE3410529A1 (de) * 1984-03-22 1985-10-03 Fa. J. Eberspächer, 7300 Esslingen Steuereinrichtung fuer eine dosierpumpe
DE3433362A1 (de) * 1984-09-07 1986-03-20 Siemens Ag Metallgekapselte, druckgasisolierte hochspannungsschaltanlage mit mehreren, mittels schottdurchfuehrungsisolatoren gasdicht geschotteten teilabschnitten der kapselung
JPS626181A (ja) * 1985-07-02 1987-01-13 Mitsubishi Electric Corp ガス絶縁機器の異常検出装置
US4734823A (en) * 1985-11-01 1988-03-29 Joslyn Corporation Fault current interrupter and explosive disconnector for surge arrester
US4685021A (en) * 1986-03-20 1987-08-04 Juri Kortschinski Fault current diverter
US4839767A (en) * 1987-02-02 1989-06-13 Mitsubishi Denki Kabushiki Kaisha Element and device for detecting internal faults in an insulating gas charged electrical apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1079733B (de) * 1959-04-21 1960-04-14 Licentia Gmbh Schutzeinrichtung fuer Leistungs- oder Lasttrennschalter, insbesondere in gekapselten Schaltanlagen
FR2388391A1 (fr) * 1977-04-22 1978-11-17 Merlin Gerin Dispositif de signalisation pour poste blinde haute-tension
GB2011184A (en) * 1977-10-04 1979-07-04 Northern Eng Ind Earthing switch for high voltage metal-clad switchgear
FR2505051A1 (fr) * 1981-04-30 1982-11-05 Sprecher & Schuh Ag Installation electrique blindee avec dispositif de detection d'amorcage
DE3238000A1 (de) * 1982-06-07 1983-12-08 Sprecher & Schuh AG, 5001 Aarau, Aargau Lichtbogenanzeigevorrichtung fuer metallgekapselte hochspannungsschaltanlagen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482547B1 (de) * 1990-10-22 1996-01-03 Gec Alsthom Sa Schalter mit Lichtbogenerfassung
EP3696840A1 (de) * 2019-02-18 2020-08-19 ABB Schweiz AG Erdungsmechanismus
WO2020169582A1 (en) * 2019-02-18 2020-08-27 Abb Schweiz Ag Earthing module
US11271375B2 (en) 2019-02-18 2022-03-08 Abb Schweiz Ag Earthing module

Also Published As

Publication number Publication date
US5089931A (en) 1992-02-18
DE69014925D1 (de) 1995-01-26
EP0382134B1 (de) 1994-12-14
DE69014925T2 (de) 1995-05-04
FR2642913A1 (fr) 1990-08-10
ATE115764T1 (de) 1994-12-15
ES2067574T3 (es) 1995-04-01
FR2642913B1 (fr) 1991-04-12

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