EP3735703A1 - 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 - Google Patents

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

Info

Publication number
EP3735703A1
EP3735703A1 EP18812155.2A EP18812155A EP3735703A1 EP 3735703 A1 EP3735703 A1 EP 3735703A1 EP 18812155 A EP18812155 A EP 18812155A EP 3735703 A1 EP3735703 A1 EP 3735703A1
Authority
EP
European Patent Office
Prior art keywords
short
contact
circuiting device
hollow cylinder
cone
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
EP18812155.2A
Other languages
German (de)
English (en)
Other versions
EP3735703B1 (fr
Inventor
Arnd Ehrhardt
Klaus Bühler
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.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
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 Dehn and Soehne GmbH and Co KG filed Critical Dehn and Soehne GmbH and Co KG
Publication of EP3735703A1 publication Critical patent/EP3735703A1/fr
Application granted granted Critical
Publication of EP3735703B1 publication Critical patent/EP3735703B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • H01H37/765—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • 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
    • 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

Definitions

  • Short-circuiting device for use in low and medium voltage systems for property and personal protection
  • the invention relates to a short-circuiting device for use in low and medium voltage systems for property and personal protection, comprising a switching element, which from the trigger signal of a
  • Fault detection device is actuated, two opposing contact electrodes with means for power supply, which are contactable to a circuit with terminals of different potential, further in at least one of the contact electrodes under
  • Sacrificial element and the switching element on the one hand and one of the contact electrodes on the other hand in order to bring about a current flow-induced, thermal deformation or destruction of the sacrificial element targeted, according to the preamble of claim 1.
  • Victim element a thin-walled hollow cylinder with a ratio between the diameter and wall thickness of the hollow cylinder greater than 10: 1, wherein the sacrificial element consists of a refractory metallic material.
  • the related short circuiter is said to have a minimum commutation time while maintaining high mechanical strength to use a high spring force for the purpose of reducing the travel time and for the purpose of faster response.
  • an insulating body and a H ilfselektrode is located in the fixed contact electrode, wherein the auxiliary electrode is in communication with the sacrificial element.
  • the contact electrodes and the opposite surfaces may have a complementary conical shape with it
  • Between the contact electrodes can be effective in the closed state venting channel or a ventilation hole to prevent, by a pressure increase in the event of short circuit, in particular in the
  • Means for generating the biasing force can according to the prior art as a compression spring, plate spring or the like spring arrangement
  • the sacrificial element may be a wire or rod made of a conductive material with a low melting integral, wherein the sacrificial element is in tension under mechanical prestressing.
  • the relevant short-circuiting device should on the one hand enable a full current-carrying capacity over a longer period of time and have a status indication.
  • the short-circuiting device has two opposing contact electrodes, wherein in one of the contact electrodes there is provided a movable contact part which is under mechanical prestressing and which is spring-assisted in the event of a short circuit and supports a movement to the further contact electrode as well as a sacrificial element.
  • a locking arrangement in the head part of a multi-part housing, which accommodates the fixed and the movable contact electrode, a locking arrangement
  • the movable contact part is provided with a relatively long, low-sided cone-shaped contact region and, as a hollow-cylindrical contact, preferably with a spring drive fitted.
  • the open state is the movement of the movable
  • the biasing force in particular the spring force is released and supported by at least one further force component, which accelerates the closing movement.
  • the movable contact part is in a fixed position
  • the sliding contact has a gap of ⁇ 1/10 mm.
  • the kinetic energy of the movable contact part is converted into a plastic deformation, which can avoid a contact bounce and a disadvantageous arc phase.
  • the movable contact part is designed as a hollow cylinder closed on one side.
  • the hollow cylinder contains a spring for generating bias. This spring can be used in a very simple manner in the hollow cylinder space, so that an additional space for the spring deleted.
  • the hollow cylinder is in a complementary recess in the first
  • Hollow cylinder bottom a first pin-shaped extension, which is opposite to the contact electrodes, second pin-shaped extension opposite. Between the first and the second peg-shaped extension, the already mentioned sacrificial element is located.
  • the sacrificial element is preferably designed as a bolt or screw with a corresponding thread.
  • the respective ends of the bolt or the screw are fixed via the thread or the screw head on the first and second peg-shaped extension.
  • the second contact electrode a adapted to the outer cone of the movable contact part recess provided with inner cone.
  • Outer and inner cone form a bounce-free short-circuit contact area with positive and positive locking due to plastic deformation occurring.
  • vents connected to the recess are provided in the region of the recess. These vents are located in the second contact electrode to prevent pressure build-up due to movement of the movable contact member.
  • vents can be closed with a pressure-displacing plug.
  • a valve-like closure may be provided so that the ingress of moisture, dirt or other foreign bodies is avoidable, but on the other hand, the aforementioned undesirable pressure build-up can be excluded.
  • deformable contact is in the range of ⁇ 3 °.
  • the contact electrodes and thus the basic construction of the short-circuiting device is preferably rotationally symmetrical.
  • the contact electrodes are kept at a distance via an insulating centering ring.
  • the overall arrangement is of a surrounding shell
  • the movable contact part can move like a piston in the recess of the first contact electrode, wherein the energy released during the destruction of the sacrificial element and / or the energy a resulting arc acts to accelerate the movement of the bottom of the movable contact and leads to shortening of the closing time.
  • the second peg-shaped extension is surrounded by an insulating tube of gas-emitting material.
  • the insulating tube may be provided with a protective, metallic shell, at least partially surrounding the insulating.
  • This novel auxiliary short-circuiter has a high switching speed which is comparable to a semiconductor switch and a limited current carrying capacity, which is tuned to the sacrificial element and the closing of the main contacts of the main short-circuiter.
  • a bridge fuse has a fuse wire which is activated by low current current flow at low voltage.
  • Bridge igniters are commonly used to ignite reactive masses. Without the use of such reactive masses they have no
  • the bridge igniter is used to trigger an auxiliary short-circuiter, which the auxiliary path for loading the
  • the auxiliary path can be closed within about 100 ms, so that no disadvantages arise in terms of the speed during switching operations with semiconductor switches.
  • the auxiliary short-circuiter uses the
  • Fusible conductor of the igniter is formed to a film, in particular a
  • Insulation film to destroy on a potential thorn. After the destruction of the insulation film, a current flows through the electrodes and Contacts of the auxiliary short-circuiter with or without arcing, which serves to trigger the sacrificial element, which closes the current-carrying main short-circuiter under spring force support.
  • the switching element according to the invention designed as a bridge igniter, consists of two opposite, current-carrying contacts, which are by an insulation to a small distance of ⁇ 1 mm geha lten, with release of the bridge igniter, the electrical insulation between the contacts is repealed.
  • the other of the current-carrying contacts has a cavity to r
  • a pressure-resistant sleeve In the cavity is a pressure-resistant sleeve is located.
  • the sleeve in the direction of the spinous process, has a cap which, with the triggering of the bridge igniter, moves in the direction of the spinous process, destroying the foil and establishing an electrical connection between the current-carrying contacts.
  • the recess may have a vent opening.
  • the conductive particles can be fixed by means of a foil or a covering layer.
  • the switching element according to the invention can outside the actual
  • Main Kurzsch multipliers are arranged, but also in these, in particular integrated into a contact electrode, in particular screwed or plugged there.
  • FIG. 1 shows a longitudinal section through a short-circuiting device with a movable contact part, designed as a hollow cylinder closed on one side, a spring being used for the generation of prestressing in the hollow cylinder and with a sacrificial element in the untripped state;
  • Fig. 2 is a sectional view of the switching element according to the invention, designed as Brückenzü countries with two opposite, current carrying electrodes, which are held by an insulation at a small distance, in one embodiment with movable, conductive cap for bridging ng isolation with recognizable spinous process, in shown example formed within a recess within the lower current carrying contact;
  • Fig. 3 is a view similar to that of FIG. 2, but with a
  • FIG. 4 shows a representation similar to that according to FIG. 1 with main short-circuiter in longitudinal section and an integrated in one of the contact electrodes according to the invention design of the switching element on the basis of a bridge igniter.
  • the short-circuiting device has at least one further, isolated inserted connection 30, via which the activation of the short-circuiting device can take place with the aid of a switching element 3, which optionally has a fuse 4 connected in series.
  • the short-circuiting device has a sacrificial element, which is designed as a screw or bolt 6 in the example shown.
  • the sacrificial element or the screw or the bolt 6 mechanically fixes a movable contact part 7, which is mechanically biased by a spring 8.
  • the sacrificial element 6 is electrically connected to the outer terminal 30 via the movable contact part 7 with the contact electrode 80 and the outer terminal 2.
  • the second contact electrode 70 is connected to the terminal 1 and electrically isolated from the first contact electrode 80 via an insulated centering part 110.
  • the insulated centering part 110 guides the contact electrodes 70; 80, wherein the joining of the aforementioned parts is preferably realized by an interference fit, in particular a cone compression dressing.
  • the movable contact part 7 is centered over the guide in the contact electrode 80 to the contact electrode 70.
  • the triggering of the short-circuiting device takes place according to the one shown
  • Embodiment variant by a flow of current through the sacrificial element 6, after the switching element 3 establishes a connection to the terminal 1.
  • the movable contact part 7 is moved to the contact electrode 70, whereby the main current path between the contact electrodes 70 and 80 via the movable contact part 7 is closed.
  • Support closing movement This is achieved by the central guidance of the current via the sacrificial element 6 and via the bottom of the movable contact part 7 substantially forced radial current conduction.
  • the sacrificial element does not melt completely to trigger the closing process.
  • the decisive factor is that the material of the sacrificial element is softened. This softening can also occur below the melting temperature.
  • first pin-shaped extension 73 which is opposite to the contact electrodes 70, 80, second pin-shaped projection 100 opposite, wherein between the first and the second pin-shaped extension 73; 100 the already mentioned sacrificial element 6, in particular designed as a bolt or screw
  • the second contact electrode 80 is a, adapted to the outer cone 72 of the movable contact 7 recess with inner cone 91st
  • outer and inner cone form a bounce-free short-circuit contact area with positive and positive fit due to a vu ertPAder plastic deformation.
  • vents 92 connected to the region of the internal cone recess may be provided in the second contact electrode 70 to provide pressure buildup due to movement of the inner cone
  • vents 92 may be closed with a pressure-displacing plug or valve.
  • the gap of the mentioned sliding contact moves in a range ⁇ 0.2 mm, preferably ⁇ 0.1 mm.
  • an outer diameter of about 30 mm results in a spring force of about 800 N and a relatively short travel of the contact part 7, a kinetic energy of a few joules, which is transferred to a large extent in plastic deformations in the contact area.
  • the fast switch 3 as shown in Figure 1 is carried out on the basis of a bridge igniter.
  • the switching element 3 has two current-carrying contacts 10 and 11, which are held by an insulating disk 12 at a small distance of, for example, ⁇ 1 mm.
  • one of the contacts may be under the action of a spring biasing force (figuratively not shown).
  • a recess is provided which has a spinous process 13 and preferably a vent opening 14.
  • the opposite contact 10 has a cavity in which a movable contact 15 is inserted in the form of a cap.
  • This movable contact cap 15 is guided on a pressure-resistant cylindrical sleeve 16.
  • the cylindrical sleeve 16 is correspondingly sealed in the area of the embodiments of the control lines 25.
  • the cavity in the sleeve 16 is minimal after insertion of the bridge igniter and optionally filled with a non-compressible medium.
  • the insulating film 18 may have an electrically conductive layer or be combined with an electrically conductive film.
  • This insulation film or insulation films then serve to achieve a sufficient dielectric strength between the opposite
  • the conductive coating or the additional conductive film is used to control the electric field in addition to a relevant optimized design of the surface of the contacts 10; 11th
  • the films can also serve to fix the movable cap 15 on the sleeve 16.
  • the movable cap 15 is designed so that it can bridge the distance between the contacts 10 and 11.
  • the cap 15 is moved after activation of the bridge igniter 17 by the expansion of the gas in the cavity of the sleeve 16 in the direction of the contact 10 and the spinous process 13 there.
  • vents 14 are provided.
  • the cap 15 is jammed in the recess in the lower current-carrying contact 11 and the thorn 13.
  • the shank of the cap 15 remains partially in the contact 10 and bridges the distance between the two contacts 10; 11, creating a metallic, conductive connection.
  • the mandrel 13 can also be fastened to the movable cap 15 or the cap 15 can be realized with a thorn-shaped extension.
  • the current carrying capacity of the above-described electrical connection via the cap 15 is the same, but preferably designed to be higher than the current carrying capacity of the sacrificial element 6.
  • the current-carrying contacts 10 and 11 require due to the described operation an exact guidance, which can be realized for example by an insulating sleeve 19 together with sealing rings 20.
  • the partially melted powder is so strongly cooled after destruction of the insulating film 18 when entering the vent channel 14 that it solidifies and closes the passage.
  • the remaining powder 21 is further heated by the arc and forms a desired metallic bridge between the contacts 10; 11th
  • the bridge igniter 17 can be upgraded even with a defined amount of conductive particles.
  • the conductive particles can in the cavity of the sleeve 16 by a
  • Lacquer layer or mechanically fixed by a film 22 Lacquer layer or mechanically fixed by a film 22.
  • the switching elements according to the illustrations according to FIGS. 2 and 3 are capable of realizing a low-resistance metallic connection between the main contacts 1 and 2 via the sacrificial element 6 according to FIGS. 1 and 4.
  • the created connection has a current carrying capacity, which
  • Main electrodes 1 and 2 is ensured in each case.
  • connection via the fast switch according to the embodiments according to FIGS. 2 and 3 takes place with triggering of the bridge igniter within a time of approximately 100 ps, which is comparable to the triggering of a semiconductor switch with corresponding EMC protective measures.
  • the auxiliary path with the fast switch 3 can be separated by means of a fuse 4 after the destruction of the sacrificial element 6. Due to the overload resistance of the fast switch and with sufficient
  • the fast switch When the current carrying capacity of the metallic cap according to FIG. 2 or the bridge of metallic particles 21 is overloaded, the fast switch functions as a spark gap with a very low arc voltage. At very high loads melt the contacts 10 and 11 in arcing partially, which in turn creates a metallic short circuit in the auxiliary path.
  • the auxiliary path can thus independently conduct currents in the range of several 10 kA for a few milliseconds until the discharge takes place by closing the main contacts via the movable contact part 7.
  • This current carrying capacity is thus higher than that of a low-cost semiconductor switch with a comparable closing time.
  • the cost and space requirements decrease compared to a semiconductor switch considerably.
  • the fast switching element can, as indicated in FIG. 1, be provided outside the actual short-circuiting device. Alternatively, however, integration within the short-circuiting device is also possible.
  • the fast switch in addition to a complete integration into the flameproof housing of the short-circuiting device, for example, by a plug or screw adapter similar to a fuse with the
  • Short circuiters are connected. This allows easy replacement of the unit with the bridge igniter with appropriate execution even under tension.
  • FIG. 4 An illustration in this regard is shown in FIG. 4.
  • the auxiliary short-circuiter is used on the basis of a bridge igniter in front of the connection 5 of the sacrificial element 6.
  • the connection to the terminal 5 can be realized by a pressure or plug connection, so that the auxiliary short-circuiter is interchangeable.
  • the auxiliary short-circuiter according to FIG. 2 is inserted in the housing of the main short-circuiter with the potential of the main contact 2 isolated by the part 23.
  • the connection of the auxiliary short-circuiter to the terminal 1 of the main short-circuiter is realized via an external connection 24. This connection 24 can also take place within the housing of the main short-circuiting device with a corresponding configuration.
  • the terminals 25 for activating the auxiliary short-circuiter to the bridge igniter 17 are isolated outwardly led to a detection unit, not shown, for providing the ignition energy.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Circuit Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un 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. Le dispositif comprend un élément de commutation actionnable par le signal de déclenchement d'un dispositif de détection de défauts, deux électrodes de contact se faisant face pourvues de moyens d'alimentation en courant, celles-ci pouvant être mises en contact avec des bornes à potentiel différent au niveau d'un circuit, en outre dans au moins une des électrodes de contact une partie de contact mobile placée sous précontrainte mécanique et effectuant en cas de court-circuit, avec l'appui d'une force de ressort, un mouvement en direction de l'autre électrode de contact, un élément sacrificiel se présentant sous la forme d'un élément d'espacement entre les électrodes de contact et une liaison électrique entre l'élément sacrificiel et l'élément de commutation d'une part et une des électrodes de contact d'autre part pour provoquer de manière ciblée la déformation ou destruction thermique, induite par la conduction de courant, de l'élément sacrificiel. Selon l'invention, la pièce de contact mobile est conçue sous la forme d'un cylindre creux fermé d'un côté et un ressort de précontrainte est inséré dans le cylindre creux. Le cylindre creux est guidé de manière mobile dans un évidement complémentaire de la première électrode de contact en formant un contact glissant. Dans la région du fond du cylindre creux fermé, la paroi du cylindre est conçue, côté périphérie extérieure, de façon à se transformer en cône. En outre, une première extension en forme de tenon s'étend à l'intérieur du cylindre creux depuis le fond, laquelle est opposée à une seconde extension en forme de tenon isolée par rapport aux électrodes de contact. L'élément sacrificiel, conçu sous la forme d'un boulon ou d'une vis, est disposé entre la première et la seconde extension en forme de tenon. Un évidement à cône intérieur, adapté au cône extérieur du contact mobile, est prévu dans la seconde électrode de contact. Les cônes extérieur et intérieur forment une zone de contact de court-circuit sans rebond par adhérence et complémentarité de formes en raison de la déformation plastique. Selon l'invention, l'élément de commutation est réalisé sous la forme d'un court-circuiteur auxiliaire sur la base d'une amorce à pont.
EP18812155.2A 2018-01-03 2018-12-03 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 Active EP3735703B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018100076.6A DE102018100076B3 (de) 2018-01-03 2018-01-03 Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz
PCT/EP2018/083269 WO2019134777A1 (fr) 2018-01-03 2018-12-03 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

Publications (2)

Publication Number Publication Date
EP3735703A1 true EP3735703A1 (fr) 2020-11-11
EP3735703B1 EP3735703B1 (fr) 2023-08-30

Family

ID=64572369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18812155.2A Active EP3735703B1 (fr) 2018-01-03 2018-12-03 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

Country Status (6)

Country Link
US (1) US11145477B2 (fr)
EP (1) EP3735703B1 (fr)
CN (1) CN111684562A (fr)
AU (1) AU2018399890B2 (fr)
DE (1) DE102018100076B3 (fr)
WO (1) WO2019134777A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019101307B3 (de) * 2019-01-18 2020-06-18 Auto-Kabel Management Gmbh Elektrischer Schließer
CN112331522A (zh) * 2020-11-16 2021-02-05 安徽理工大学 非接触爆炸式开关
CN114400611B (zh) * 2022-01-16 2024-03-01 莆田学院 一种GaN器件便于警示的短路保护装置
AT525886B1 (de) * 2022-07-05 2023-09-15 Miba Sinter Austria Gmbh Sicherheitsschalter

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US4150266A (en) * 1977-01-27 1979-04-17 Networks Electronic Corp. Miniature pyrotechnic squib switch, single pole, normally open
DE9419141U1 (de) 1994-11-29 1996-03-28 Kloeckner Moeller Gmbh Kurzschließer zum Löschen von Störlichtbögen zur Verwendung in Schaltanlagen
US20030231439A1 (en) * 2002-06-14 2003-12-18 Juds Mark Allan Bullet assembly for a vacuum arc interrupter
US6853525B2 (en) * 2002-06-14 2005-02-08 Eaton Corporation Vacuum arc interrupter actuated by a gas generated driving force
US6839209B2 (en) * 2002-06-14 2005-01-04 Eaton Corporation Shorting switch and system to eliminate arcing faults in power distribution equipment
DE102005048003B4 (de) 2005-08-04 2008-04-30 Dehn + Söhne Gmbh + Co. Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz
US8659866B2 (en) * 2010-08-27 2014-02-25 Cooper Technologies Company Compact transient voltage surge suppression device
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DE202012001729U1 (de) * 2012-02-20 2012-04-04 Dehn + Söhne Gmbh + Co. Kg Anordnung zum Anlagen- und Personenschutz im Niederspannungsbereich
DE102014110825A1 (de) * 2014-07-30 2014-09-18 Peter Lell Elektrischer Schalter, insbesondere für hohe Spannungen und/oder hohe Ströme
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DE102016115222B4 (de) 2016-06-30 2020-02-13 Dehn Se + Co Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz

Also Published As

Publication number Publication date
CN111684562A (zh) 2020-09-18
EP3735703B1 (fr) 2023-08-30
US11145477B2 (en) 2021-10-12
US20210066009A1 (en) 2021-03-04
DE102018100076B3 (de) 2019-06-13
WO2019134777A1 (fr) 2019-07-11
AU2018399890A1 (en) 2020-07-16
AU2018399890B2 (en) 2022-01-06

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