WO1996019816A1 - Dispositif electrique de commutation - Google Patents

Dispositif electrique de commutation Download PDF

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Publication number
WO1996019816A1
WO1996019816A1 PCT/SE1995/001526 SE9501526W WO9619816A1 WO 1996019816 A1 WO1996019816 A1 WO 1996019816A1 SE 9501526 W SE9501526 W SE 9501526W WO 9619816 A1 WO9619816 A1 WO 9619816A1
Authority
WO
WIPO (PCT)
Prior art keywords
fire tube
switching device
connecting member
missile
contacts
Prior art date
Application number
PCT/SE1995/001526
Other languages
English (en)
Inventor
Gert Bjarnholt
Anders Björklund
Henrik Breder
Lars-Gunnar Dahlberg
Göran Engdahl
Hans-Olof Kalldin
Mats Leijon
Ming Li
Per Nordlund
Jan-Anders Nygren
Stefan Valdemarsson
Original Assignee
Asea Brown Boveri Ab
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 Asea Brown Boveri Ab filed Critical Asea Brown Boveri Ab
Publication of WO1996019816A1 publication Critical patent/WO1996019816A1/fr

Links

Classifications

    • 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
    • H01H39/004—Closing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected

Definitions

  • the present invention relates to an electric switching device, and more particularly a high-speed circuit closer, for achieving a rapid mechanical and electrical short circuiting of a multi-phase network.
  • the switching device is preferably intended to be used as arc eliminator in cubicle-enclosed switchgear for the low voltage and medium voltage range up to about 40 kV, but also other fields of use are feasible.
  • the switching device is intended to handle high currents, for example in the range of up to about 50 kA.
  • the safety in switchgear is not only dependent on the contents of a specified standard. It is also highly dependent on the capacity of the switchgear to eliminate or minimize the damage caused by a short-circuit arc.
  • An arc guard may consist of a photocell, which, when an arc arises, gives a signal which triggers a circuit-breaker placed on the line ahead of the switchgear.
  • the arc duration may be limited to about 70 ms.
  • the pressure increase m switchgear has already reached its maximum and the switchgear must therefore be dimensioned and equipped to withstand the pressure wave.
  • the hot gases and the intense light may also result in ignition of combustible organic material.
  • a switching device for high voltage which utilizes an explosive charge for removing a latch, whereby a pneumatically driven piston drives a movable contact to make contact with a stationary contact
  • the Sv itching device does not utilize the fast action of the e>plosive charge but relies on the pneumatically driven piston to rapidly cause a closing operation.
  • a problem with this solution is the relatively large mass in the piston and the contact device which entails too long a closing time.
  • a plurality of other solutions are known wherein a piston running m a cylinder is utilized for bringing two contacts to close or break via a linkage system.
  • Such a known circuit breaker with both a closing and a breaking function is described in the patent specification US 4 358 648.
  • a piston is driven by a powder charge, via a linkage system, to cause breaking or closing of an operating device. Also in this case, the mass inertia of the piston and the linkage system indicates that closing is performed only after a relatively long time.
  • German published patent application 2 113 798 A high- voltage circuit closer is previously known, which utilizes an explosive charge to briefly achieve contact between two con ⁇ tacts. The explosive charge drives a flow of ionized gas past the contacts, whereby inside the circuit closer an arc arises, which is capable of carrying current between the contacts.
  • US 5 006 679 describes a similar circuit closer, which also utilizes ionized gas from an explosive charge to bring about contact between two contacts via an arc. A problem with these two inventions is that they can only cause closing between two conductors for a short time, whereafter the contact is again broken.
  • equipment for high- voltage testing which comprises an explosion-driven circuit closer.
  • This circuit closer utilizes a gas, suddenly produced from an explosion, with a high pressure to drive a contact piece from a rest position to a closed position within a sufficiently short space of time.
  • One problem with this circuit closer is that it is capable of bringing about contact between two conductors only.
  • Another problem is that the contact piece lacks guiding, which means that the closer described must rely on the explosive gases to develop uni ⁇ formly when the contact piece is driven towards the closed position. An unsymmetrical combustion of the explosive charge may impart rotational force to the contact piece when it leaves the rest position, whereby the contact piece may miss the closed position.
  • a plurality of explosion-driven circuit closers are known, for example from patent specifica ⁇ tions GB 1360921 and US 4150266.
  • the latter describes a miniature circuit closer intended to operate in a missile.
  • a piston resting in a cylindrical shell, and the front of which consists of an insulating cover enclosing a mass of conductive material, is brought by the force from an explosive charge to move from its rest position towards two contacts extending into the end of the tube, causing these contacts to penetrate through the insulating cover and bringing them into electrical contact via the electrically conducting mass.
  • the miniature circuit closer has very small dimensions and is intended for low voltage only.
  • circuit closer By a scaling of the miniature circuit closer, insulation distances between the conductors and between the casing and the respective conductor may be made sufficiently large.
  • the circuit closer thus scaled, would result m the piston with the closing medium receiving such dimensions and such a weight that the rapidity would be injuriously deteriorated.
  • An additional problem with the circuit closer described is that its electrically conductive mass cannot transfer high currents. For this, the closing medium must have extremely little electrical resistance and, m addition, be able rapidly to carry off heat.
  • the invention aims to provide an electric switching device, a so-called high-speed circuit closer, which is capable very rapidly to bring about electrical contact between several conductors and, m particular, to connect three phases to ground.
  • the closing must be reliable and permanent.
  • the high ⁇ speed circuit closer shall manage both high voltage and high current. It needs to function only once. This is achieved according to the invention by an explosion circuit closer, whicn ma ⁇ es use of an explosive force to fire away a missile whicr. closes a plurality of circuits simultaneously.
  • the explosive circuit closer comprises a closed container filled witn a gaseous insulating medium, through which container a plurality of conductors, via wedge-shaped contacts, are connected to a fire tube placed centrally in the container.
  • the fire tube is made of an electrically insulating material.
  • the contacts penetrate through the mid-portion of the tube m a normal plane to the tube, whereby those contact surfaces of the contacts which are inclined towards the missile are exposed on the inside of the tube.
  • the missile is made of an electrically conductive material with good thermal conducti ⁇ vity , for example of metal.
  • the missile In the contact position, the missile is slowed down, whereby its kinetic energy is absorbed by the damper as well as by the plasticizmg work which is 5 performed when the missile is wedged between the contacts.
  • the wedged position brings about a good electrical connection between the missile and the respective contact.
  • a high-speed circuit closer according to the invention is 10 especially suitable for use as arc eliminator in air-msulated switchgear, since it may be designed with such a short closing time that the overpressure generated during a short-circuit arc is limited to a level harmless for the enclosure.
  • the switchgear need not be provided with any means for 15 pressure relief
  • the closing time that is, the time it takes from the detec ⁇ tion of an arc until closing occurs, may be divided into reaction time and action time.
  • the reaction time comprises the
  • the reaction time is the time during which the contact piece moves to the contact position.
  • the reaction time co -
  • the first part or the reaction time may be minimized.
  • a fast explosion n process may be achieved by a suitable choice of explosive material and a rapid build-up of the gas pressure by making the explosion volume small.
  • the action time may be minimized by reducing the mass of the contact piece, by reducing its path of propagation and by imparting to the contact the
  • the pressure should permanently increase m the enclosure behind the missile. This is achieved by the explo ⁇ sive charge, through which a constantly increasing gas pressure is obtained.
  • a pressure build-up by connecting, via a valve means, the enclosure to a vessel containing a gas under a high pressure is less effective than a gas expansion from an explosive charge.
  • the valve itself constitutes a resistor, and for another, the gas pressure drops when the gas is distributed between the vessel and the volume- increasing enclosure behind the missile.
  • Figure 1 shows a section of a high-speed circuit closer according to the invention
  • Figure 2 shows a cross section of the high-speed circuit closer along the dash-dotted line II-II in Figure 1.
  • Figure 3 shows a section of an alternative embodiment of the 2 ⁇ high-speed circuit closer in open position
  • Figure 4 shows the alternatively designed high-speed circuit closer in closed position.
  • a high-speed circuit closer comprises a fire tube 7 in a container 3 with a gaseous insu ⁇ lating medium under overpressure built up between a lower 35 plate 1 and an upper plate 2 parallel thereto.
  • the container 3 comprises a cylindrical shell or casing 4, which together v/ith the lower plate 1 and the upper plate 2 limits the volume of the container.
  • the casing 4 comprises four plane portions 5 where electric insulators 6 may be connected.
  • the plates and the casing are made of electrically conductive material.
  • the fire tube 7 is made of electrically insulating material, for example glass-fibre reinforced epoxy resin, and is fixed in the centre of the container between the lower plate 1 and the upper plate 2.
  • the fire tube 7 is substantially circular and encloses in its lower end 8 a missile 10 and in its upper end 9 an energy-absorbing damping block 11.
  • the tube is filled with a gaseous insulating medium which communicate with the gas in the container through a number of passageways 12.
  • Insulators 6 are connected to three of the plane portions of the casing. Through each insulator runs a conductor 13, the outer end 14 of which is intended to be connected to one of the phase conductors in the multi-phase network which is to be short-circuited.
  • the inner end 15 of the conductor is connec ⁇ ted, via a joining piece 16, to a contact 17 fixed to the fire tube 7.
  • a grounding conductor 18 is connected, which is electrically connected to the container 3.
  • the grounding conductor 18 is connected, via a joining piece 16, to a contact 17 fixed to the fire tube.
  • Each contact 17 projects into the fire tube and has a wedge-shaped inner part, the tip of which is directed along the fire tube 7 in a direction towards the missile 10, whereby the wedge-shaped part is given a contact surface 19 inclined towards the missile.
  • the four contacts 17 are rotationally-symmetrically placed in a normal plane to the fire tube.
  • the missile 10 is made of an electrically conductive material, for example copper, and has substantially a cylindrical shape with a conical front portion.
  • the missile is designed with such a fit with respect to the fire tube that it is retained in its rest position and comprises, in its lower part, an explosive charge 20 of, for example, powder.
  • the damping block 11 placed m the upper end of the fire tube has a cylindrical shape with a diameter somewhat smaller than that of the fire tube and consists of a material with a good energy-absorbing capacity, for example a plastic material.
  • a channel 21 is provided through the fire tube 7, at the upper end thereof, which channel may be dimensioned so as to admit gas under resistance which, during the closing movement, is compressed by the missile, thus damping the movement.
  • Figure 3 shows an alternative embodiment of the high-speed circuit closer with the missile 10 in the rest position
  • Figure 4 shows the missile in the closed position.
  • a signal generated by a detector for example an arc guard
  • the powder charge is brought to explode, for example by an electric firing device.
  • a sudden gas expansion arises between the missile 10 and the lower plate 1, whereby the missile is driven away from its rest position along the fire tube 7.
  • the missile is guided by the fire tube so as to move m a plane movement, thus reaching the four 17 contacts at the same time. hen the missile has reached the contacts, its movement must be braked and brought to a stop.
  • the propellant gases are evacuated through the passageways 12 in the lower part of the fire tube after these have been exposed after the passage of the missile 10 (Fig. 4) .
  • the kinetic energy of the missile s transformed into heat when the cone-shaped front portion of the missile 10 hits the contacts 17 and becomes wedged there ⁇ in Finally, the missile hits the damping block 11, whereby the movement of the missile is stopped by an energy absorption while the damping block is being deformed.
  • the distances between the contacts 17 and the distances between the contacts and the missile 10, as well as the diameter of the fire tube, may be made small.
  • the missile With a diameter of about 30 mm, the missile is given a small mass, while at the same time the distance between the rest position and the closed position of the missile may be limited to about 30 mm.
  • a small diameter gives -. faster pressure build-up of the explosion gases.
  • a smaller mass of the missile also increases the rapidity in that its mass inertia decreases, while at the same time less energy is needed to stop the missile.
  • the distances are determined bv the risk of flashover.
  • the fire tube 7 comprises two coaxially placed tubes of the same construc ⁇ tion.
  • the wedge-shaped inner part of the contacts may then rest against the outer tube and be locked by rotation of this tube.
  • Such an arrangement also results in the contacts 17 being easily replaceable after a closing operation.
  • the shape of the damping block 11 is not locked to that of the cylinder but may be, for example, conical or have the shape of an accordion.
  • the body itself may be solid or hollow and may comprise one material or a composition of materials.
  • the front portion of the missile may be given the shape of the tip of a Phillips® screwdriver, in which case only those parts of the missile which encounter the wedge-shaped contacts are bevelled. Such a shape would give the missile an improved guiding capacity in the fire tube.
  • the explosive charge may advantageously be placed on or in a recess of the lower plate, or in a seat, arranged for direc ⁇ ting the explosive force, between the missile and the lower plate.
  • a circular recess is suitably arranged in each of the upper plate and the lower plate, into which recess the fire tube may be pressed and fixed by a drive fit.

Landscapes

  • Gas-Insulated Switchgears (AREA)

Abstract

Dispositif électrique de commutation assurant la mise en contact simultanée d'au moins trois conducteurs (13) et conçu pour des tensions et des intensités élevées. Le dispositif comprend une enceinte (3) consistant en deux plaques (1,2) et une enveloppe cylindrique (4). L'enceinte, remplie d'un milieu gazeux isolant, renferme un tube détonnant isolant (7). Des isolateurs (6) sont fixés à l'enceinte (4) au travers desquels passent des conducteurs (13) reliés à des contacts (17) disposés dans le tube détonnant (7). Un projectile (10) de matériau conducteur est placé à une extrémité du tube détonnant (7) et un bloc amortisseur (11) à l'autre. Du fait de la force de compression exercée par la charge explosive du tube, le projectile vient se coincer entre les contacts (17) qui se trouvent ainsi interconnectés électriquement.
PCT/SE1995/001526 1994-12-22 1995-12-18 Dispositif electrique de commutation WO1996019816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404455A SE9404455L (sv) 1994-12-22 1994-12-22 Elektrisk kopplingsapparat
SE9404455-9 1994-12-22

Publications (1)

Publication Number Publication Date
WO1996019816A1 true WO1996019816A1 (fr) 1996-06-27

Family

ID=20396422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001526 WO1996019816A1 (fr) 1994-12-22 1995-12-18 Dispositif electrique de commutation

Country Status (2)

Country Link
SE (1) SE9404455L (fr)
WO (1) WO1996019816A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999005729A2 (fr) * 1997-07-25 1999-02-04 Minnesota Mining And Manufacturing Company Appareil et procede de derivation pour dispositifs de stockage d'energie relies en serie
DE19908576A1 (de) * 1999-02-27 2000-08-31 Moeller Gmbh Vorrichtung zur elektrischen Verbindung von Stromschienen
EP1282145A1 (fr) * 2001-07-30 2003-02-05 Abb Research Ltd. Procédé et dispositif pour le court-circuitage pyrotechnique auto-allumé
DE19712387B4 (de) * 1996-04-27 2005-12-08 Delphi Technologies, Inc., Troy Pyrotechnisches Schaltelement für elektrische Stromkreise
DE102006024991A1 (de) * 2006-05-30 2007-12-06 Abb Technology Ag Verfahren zur Löschung eines Störlichtbogens innerhalb einer Mittel- und Hochspannungsschaltanlage, sowie Kurzschlusseinrichtung selbst
WO2009080452A1 (fr) * 2007-12-21 2009-07-02 Siemens Aktiengesellschaft Tube commutateur à vide
EP2194556A1 (fr) * 2008-12-03 2010-06-09 LS Industrial Systems Co., Ltd Court circuiteur rapide dans un système de distribution électrique
FR2953324A1 (fr) * 2009-11-27 2011-06-03 Snpe Materiaux Energetiques Interrupteur electrique a tiroir coulissant formant coupe-circuit ou commutateur
DE102011017306A1 (de) * 2011-01-12 2012-07-12 Abb Technology Ag Hochspannungsschaltanlage mit gasförmiger Isolation
US8525052B2 (en) 2008-12-18 2013-09-03 Abb Technology Ag Switch arrangement for medium and high-voltage switching devices
JP2013239411A (ja) * 2012-05-17 2013-11-28 Daikin Ind Ltd 回路切換装置
WO2014062114A1 (fr) * 2012-10-19 2014-04-24 Jan Karlsson Dispositif pour un court-circuitage et une mise à la terre rapides des phases dans un réseau de puissance
WO2016031327A1 (fr) * 2014-08-28 2016-03-03 三菱電機株式会社 Dispositif de contact à grande vitesse et appareil de commutation équipé de celui-ci
CN105869953A (zh) * 2016-05-04 2016-08-17 中国船舶重工集团公司第七研究所 应用于低压、中压或高压短路灭弧的开关装置
WO2016169612A1 (fr) * 2015-04-24 2016-10-27 Abb Technology Ltd Commutateur de dérivation comprenant un élément mobile avec une première section conductrice et une deuxième section conductrice
WO2018001686A1 (fr) * 2016-06-30 2018-01-04 Dehn + Söhne Gmbh + Co. Kg Dispositif de mise en court-circuit destiné à être utilisé dans des systèmes à basses et moyennes tensions pour la protection des biens et des personnes
AT521539A1 (de) * 2018-07-17 2020-02-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnischer Schließer
WO2022008000A1 (fr) * 2020-07-10 2022-01-13 Peter Lell Élément de commutation de connexion électrique
WO2024103096A1 (fr) 2022-11-15 2024-05-23 Miba Emobility Gmbh Dispositif de commutation d'urgence électrique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1640913A1 (de) * 1967-03-21 1970-11-26 Leiber Dr Carl Otto Verfahren zum Schalten von Stroemen und Schaltelement
DE2623816A1 (de) * 1976-05-28 1977-12-08 Calor Emag Elektrizitaets Ag Schnellerdungsvorrichtung
US4563556A (en) * 1984-03-28 1986-01-07 Michel Goldstein Internal combustion circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1640913A1 (de) * 1967-03-21 1970-11-26 Leiber Dr Carl Otto Verfahren zum Schalten von Stroemen und Schaltelement
DE2623816A1 (de) * 1976-05-28 1977-12-08 Calor Emag Elektrizitaets Ag Schnellerdungsvorrichtung
US4563556A (en) * 1984-03-28 1986-01-07 Michel Goldstein Internal combustion circuit breaker

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712387B4 (de) * 1996-04-27 2005-12-08 Delphi Technologies, Inc., Troy Pyrotechnisches Schaltelement für elektrische Stromkreise
WO1999005729A3 (fr) * 1997-07-25 1999-07-01 Minnesota Mining & Mfg Appareil et procede de derivation pour dispositifs de stockage d'energie relies en serie
WO1999005729A2 (fr) * 1997-07-25 1999-02-04 Minnesota Mining And Manufacturing Company Appareil et procede de derivation pour dispositifs de stockage d'energie relies en serie
DE19908576A1 (de) * 1999-02-27 2000-08-31 Moeller Gmbh Vorrichtung zur elektrischen Verbindung von Stromschienen
EP1282145A1 (fr) * 2001-07-30 2003-02-05 Abb Research Ltd. Procédé et dispositif pour le court-circuitage pyrotechnique auto-allumé
DE102006024991A1 (de) * 2006-05-30 2007-12-06 Abb Technology Ag Verfahren zur Löschung eines Störlichtbogens innerhalb einer Mittel- und Hochspannungsschaltanlage, sowie Kurzschlusseinrichtung selbst
WO2007137780A1 (fr) 2006-05-30 2007-12-06 Abb Technology Ag Procédé de suppression d'un arc électrique parasite au sein d'une installation de distribution haute et moyenne tensions, et dispositif de court-circuit lui-même
WO2009080452A1 (fr) * 2007-12-21 2009-07-02 Siemens Aktiengesellschaft Tube commutateur à vide
US8258419B2 (en) 2008-12-03 2012-09-04 Ls Industrial Systems Co., Ltd. High-speed closing switch in power distributor
EP2194556A1 (fr) * 2008-12-03 2010-06-09 LS Industrial Systems Co., Ltd Court circuiteur rapide dans un système de distribution électrique
US8525052B2 (en) 2008-12-18 2013-09-03 Abb Technology Ag Switch arrangement for medium and high-voltage switching devices
US9058940B2 (en) 2009-11-27 2015-06-16 Herakles Cutout switch or changeover switch having breakable permanent electrical junction
CN102870183A (zh) * 2009-11-27 2013-01-09 海瑞克里兹 具有滑块且形成断流开关或转换开关的电开关
WO2011064510A1 (fr) * 2009-11-27 2011-06-03 Snpe Materiaux Energetiques Interrupteur electrique a tiroir coulissant formant coupe-circuit ou commutateur
FR2953324A1 (fr) * 2009-11-27 2011-06-03 Snpe Materiaux Energetiques Interrupteur electrique a tiroir coulissant formant coupe-circuit ou commutateur
DE102011017306A1 (de) * 2011-01-12 2012-07-12 Abb Technology Ag Hochspannungsschaltanlage mit gasförmiger Isolation
JP2013239411A (ja) * 2012-05-17 2013-11-28 Daikin Ind Ltd 回路切換装置
US9318294B2 (en) 2012-10-19 2016-04-19 Jan Karlsson Device for rapid short-circuiting and earthing of the phases in a power network
WO2014062114A1 (fr) * 2012-10-19 2014-04-24 Jan Karlsson Dispositif pour un court-circuitage et une mise à la terre rapides des phases dans un réseau de puissance
AU2013332473A1 (en) * 2012-10-19 2015-05-14 Arcteq Oy Device for rapid short-circuiting and earthing of the phases in a power network
AU2013332473B2 (en) * 2012-10-19 2015-07-23 Arcteq Oy Device for rapid short-circuiting and earthing of the phases in a power network
JPWO2016031327A1 (ja) * 2014-08-28 2017-04-27 三菱電機株式会社 高速投入器およびこれを備えたスイッチギヤ
WO2016031327A1 (fr) * 2014-08-28 2016-03-03 三菱電機株式会社 Dispositif de contact à grande vitesse et appareil de commutation équipé de celui-ci
US10593496B2 (en) 2014-08-28 2020-03-17 Mitsubishi Electric Corporation High-speed closing device and switchgear including high-speed closing device
KR101905338B1 (ko) * 2014-08-28 2018-10-05 미쓰비시덴키 가부시키가이샤 고속 투입기 및 이것을 구비한 스위치 기어
WO2016169612A1 (fr) * 2015-04-24 2016-10-27 Abb Technology Ltd Commutateur de dérivation comprenant un élément mobile avec une première section conductrice et une deuxième section conductrice
US10153120B1 (en) 2015-04-24 2018-12-11 Abb Schweiz Ag Bypass switch comprising a movable member with a first conductive section and a second conductive section
CN105869953A (zh) * 2016-05-04 2016-08-17 中国船舶重工集团公司第七研究所 应用于低压、中压或高压短路灭弧的开关装置
CN109690723A (zh) * 2016-06-30 2019-04-26 德恩及索恩两合股份有限公司 在低压或中压设备中使用、用于物品和人员保护的短路装置
AU2017290406B2 (en) * 2016-06-30 2019-12-05 Dehn Se Short-circuiting device for use in low-voltage and medium-voltage systems for protecting parts and personnel
US10529523B2 (en) 2016-06-30 2020-01-07 Dehn + Söhne Gmbh + Co. Kg Short-circuiting device for use in low-voltage and medium-voltage systems for protecting parts and personnel
WO2018001686A1 (fr) * 2016-06-30 2018-01-04 Dehn + Söhne Gmbh + Co. Kg Dispositif de mise en court-circuit destiné à être utilisé dans des systèmes à basses et moyennes tensions pour la protection des biens et des personnes
CN109690723B (zh) * 2016-06-30 2020-08-18 德恩塞两合公司 在低压或中压设备中使用、用于物品和人员保护的短路装置
AT521539A1 (de) * 2018-07-17 2020-02-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnischer Schließer
AT521539B1 (de) * 2018-07-17 2022-11-15 Astotec Automotive Gmbh Pyrotechnischer Schließer
WO2022008000A1 (fr) * 2020-07-10 2022-01-13 Peter Lell Élément de commutation de connexion électrique
WO2024103096A1 (fr) 2022-11-15 2024-05-23 Miba Emobility Gmbh Dispositif de commutation d'urgence électrique

Also Published As

Publication number Publication date
SE9404455D0 (sv) 1994-12-22
SE9404455L (sv) 1996-06-23

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