EP3489979B1 - Mehrpoliger niederspannungsschalter - Google Patents

Mehrpoliger niederspannungsschalter Download PDF

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Publication number
EP3489979B1
EP3489979B1 EP18208111.7A EP18208111A EP3489979B1 EP 3489979 B1 EP3489979 B1 EP 3489979B1 EP 18208111 A EP18208111 A EP 18208111A EP 3489979 B1 EP3489979 B1 EP 3489979B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
cover
main body
pole
arc
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.)
Active
Application number
EP18208111.7A
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English (en)
French (fr)
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EP3489979A1 (de
Inventor
Marc Rival
Cyril DOMENECH
Daniel Rota
Claude Todeschini
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3489979A1 publication Critical patent/EP3489979A1/de
Application granted granted Critical
Publication of EP3489979B1 publication Critical patent/EP3489979B1/de
Active legal-status Critical Current
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Classifications

    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/74—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in gas
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/002—Venting with external pressure
    • H01H2213/004—Scavenger; Filter
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Definitions

  • the present invention relates to a low-voltage multipole circuit breaker.
  • Low voltage multipolar circuit breakers comprising a molded case divided into interior compartments each associated with a pole of the circuit breaker and each containing separable electrical contacts, the movement of which is controlled by an actuation mechanism common to all the poles and controlled by a trigger.
  • circuit breaker An example of such a circuit breaker is described in FR-2780549-A1 . Another example is described in EP-A-0437151 .
  • circuit breakers are more particularly intended to be used to interrupt high currents, generally between 630 A and 6300 A.
  • the current is cut in the air, by separation of the electrical contacts, with the help of a arc breaking chamber associated with each pole.
  • cut-off gases hot and ionized gases, called cut-off gases, are generated when the current is cut off.
  • cut-off gases hot and ionized gases, called cut-off gases.
  • These cleavage gases have a high temperature, typically above 2000 ° C., as well as a high pressure. They must be removed from the circuit breaker after having been cleaned up and cooled beforehand.
  • circuit breakers include cut-off gas filtering devices.
  • circuit breakers are however not entirely satisfactory in certain contemporary uses, in particular when these circuit breakers are intended to operate at higher electrical voltages, for example for low voltages greater than or equal to 500 V AC and which can range up to 690 V AC for each phase.
  • circuit breakers then present a greater risk of being damaged following an excessive overpressure of the breaking gas inside the circuit breaker housing.
  • the invention more particularly intends to remedy by proposing a low-voltage multipole circuit breaker in which the discharge of the breaking gases is optimized without degrading the performance of the circuit breaker.
  • the additional orifices and the peripheral opening make it possible to provide an escape from the breaking gases in the event of significant overpressure, so as to avoid destruction of the circuit breaker, while limiting the amount of breaking gas which does not pass not by the filtration device.
  • the evacuation and treatment of the breaking gases is therefore optimized, without degrading the performance of the circuit breaker.
  • the figures 1 to 4 represent a low-voltage multipole circuit breaker 2 comprising a molded case including a main body 4 and a removable cover 6 attached to the main body 4.
  • the cover 6 When the cover 6 is mounted on the main body 4, it covers a main face 22 of the main body 4.
  • the main face 22 is a front face of the main body 4.
  • the cover 6 is fixed to the main body 4, leaving a peripheral opening between the cover 6 and the main body 4. This peripheral opening extends around the periphery of the cover 6.
  • the cover 6 defines, with the face 22, an interior volume.
  • the peripheral opening places this interior volume in communication with the exterior of the case of circuit breaker 2.
  • the reference “P2” designates a geometric plane at which the junction between the cover 6 and the main body 4 is made.
  • the peripheral opening has a spacing, denoted E2, of between 0.3mm and 1mm and, more preferably, of between 0.5mm and 0.7mm and, more preferably, equal to 0.6mm.
  • This spacing E2 is here measured in a direction perpendicular to the main face 22.
  • main body 4 is made of thermoset polyester and cover 6 is made of polycarbonate.
  • the circuit breaker 2 also includes a switching mechanism.
  • the circuit breaker 2 also includes a trip device 8 and a manual control lever 10, capable of controlling the switching mechanism.
  • the trip device 8 and the control lever 10 are arranged at the front of the circuit breaker 2 so as to be accessible by a user of the circuit breaker 2.
  • the circuit breaker 2 has several electrical poles, here each associated with an electrical phase of an electrical installation to which the circuit breaker 2 is connected.
  • the circuit breaker 2 is a three-pole circuit breaker intended to operate with a three-phase electrical installation.
  • the circuit breaker 2 has for this purpose three electrical poles, each associated with one of the three electrical phases.
  • the circuit breaker 2 is a four-pole circuit breaker, intended to operate with a three-phase electrical installation provided with a neutral line.
  • the circuit breaker 2 then has four poles, respectively associated with the electrical phases and the neutral line.
  • low voltage it is meant that the circuit breaker 2 is capable of operating at electrical voltages up to 690 V AC for each pole.
  • Circuit breaker 2 is capable of interrupting nominal currents of intensity between 630 A and 6300 A.
  • the main body 4 of the circuit breaker box 2 is divided into interior compartments, each associated with a pole of the circuit breaker 2. These compartments are also called “pole compartments” in the following.
  • the reference signs 12, 14 and 16 are used indifferently to designate the electrical poles of the circuit breaker 2 or else the corresponding interior compartments.
  • the compartments 12, 14 and 16 are aligned laterally side by side along a transverse axis of the main body 4.
  • the compartment 14 is in the central position of this alignment.
  • the compartments 12 and 16 are placed in a lateral position on either side of the central compartment 14.
  • the compartments 12, 14 and 16 are separated in pairs by internal partitions.
  • the main face 22 of the main body 4 also comprises an additional orifice 18, 20 for at least two of the poles.
  • the role of these additional orifices 18, 20 is described in more detail in the following.
  • each additional orifice 18, 20 has an oblong shape.
  • the area of each additional hole 18, 20 is between 0.5cm 2 and 2cm 2 and preferably equal to 1 cm 2.
  • the circuit breaker 2 comprises a first additional orifice 18, associated with the compartment 12 and a second additional orifice 20, associated with the compartment 16.
  • the central compartment 14 has no additional orifice.
  • the circuit breaker 2 comprises, for each pole, electrical connection terminals 30, 32 and separable electrical contacts, such as a fixed electrical contact 34 associated with a movable electrical contact 36, each connected to a terminal 30, 32.
  • the contacts 34 and 36 are provided with electrical contact pads 38.
  • the control mechanism is common to all the poles and is adapted to open or close the electrical circuit formed by these contacts 34 and 36, in particular by virtue of a rotary shaft 39 configured to set the movable contact 36 in motion. prevent or, alternately, authorize the circulation of an electric current between terminals 30 and 32 for each pole.
  • the shaft 39 is common to the poles of the circuit breaker 2 and extends in the main body 4 in a transverse direction of the circuit breaker 2.
  • the internal partitions separating the compartments 12, 14 and 16 are provided with openings allowing passage of the shaft 39. However, these openings do not allow fluid communication between neighboring compartments.
  • the circuit breaker 2 further comprises, for each pole, a breaking chamber 40.
  • the breaking chamber 40 comprises a stack 42 of separation plates arc, a spark arrester 44, a lower arc horn 46 and a cut-off gas outlet orifice, said main orifice, provided with a filtration device 48.
  • the main orifice opens out from the main body 4 and therefore outside the circuit breaker 2.
  • the geometric axis X40 designates a direction of alignment of the plates of the stack 42.
  • the spark arrester 44 overcomes the stack 42, by being aligned with this stack along the axis X40.
  • the spark arrester 44 has the shape of a curved solid plate, here bent at a right angle so that its cross section has an L shape.
  • the additional orifice 18 is formed in the main face 22 directly above the spark arrester 44. In other words, the spark arrester 44 is interposed between the additional orifice 18 and the stack 42.
  • the orifice additional 18 is here aligned with the spark arrester 44 along the axis X40.
  • the reference X48 designates a geometrical axis passing through the main orifice for exit from the breaking gas.
  • the X48 axis is perpendicular to the X40 axis.
  • the interrupting chamber 40 is arranged in such a way that most of the interrupting gas is evacuated from the compartment 12 by passing through the filtering device 48.
  • the flow of interrupting gas is therefore essentially oriented along the axis X48 when it is evacuated from compartment 12.
  • the other poles of circuit breaker 2 have a similar design.
  • the pole 16 is similar to the pole 12, except that the additional orifice of the pole 16 bears the reference 20.
  • the pole 14, located between the poles 12 and 16, is similar to the pole 12, put apart from the fact that it does not have an additional opening 18 or 20.
  • the arrangement of the additional orifices 18 and 20 makes it possible to limit the amount of cut-off gas which is released during such decompression. In fact, it is undesirable to reject too much unpolluted and uncooled cut-off gas outside the circuit breaker 2, as this could have harmful consequences for the safety of property and people.
  • the cover 6 In normal operation of the circuit breaker 2, the cover 6 is mounted on the main body 4. In fact, the breaking gas leaving through the additional orifices 18 and 20 must travel inside the cover 6, in the interior volume, before to be able to leave the circuit breaker 2. This arrangement attenuates the pressure wave formed during the ejection of the breaking gases, and limits the loss of tightness of the circuit breaker 2 caused by the presence of the additional orifices 18 and 20, in particular the waterproof and dustproof.
  • the previously defined values of the spacing E2 make it possible to ensure satisfactory evacuation of the overpressure, without however degrading the sealing properties of the circuit breaker, in particular the sealing against water and dust.
  • the invention makes it possible to limit the risk of damage to the circuit breaker 2 following an overpressure, without degrading the performance of the circuit breaker 2.
  • the interrupting chamber 40 further comprises vertical deflectors 50 made of a material comprising synthetic fibers, for example of the aramid type.
  • the deflectors 50 are made of the material known under the trade name Nomex® and sold by the company DU PONT DE NEMOURS.
  • the deflectors 50 are installed vertically on either side of the entrance to the interrupting chamber 40, extending parallel to the axis X40.
  • the deflectors 50 have the shape of an elongated strip and are fixed to the side walls of the breaking chamber 40.
  • the deflectors 50 are two in number here.
  • the deflectors 50 channel the electric arc in the interrupting chamber 40 and minimize the return of interrupting gas laterally on the periphery of the interrupting chamber.
  • the deflectors 50 therefore help to further optimize the evacuation and treatment of the breaker gases from circuit breaker 2.
  • the figure 5 represents an embodiment of the cover 6.
  • This cover 6 has a main part 60, here in the form of a hollow block, the base of which is a regular quadrilateral.
  • the main part 60 has a front wall which forms a front face of the circuit breaker 2 when the cover 6 is mounted on the main body 4.
  • the front wall has through windows 62 and 64 allowing respectively the passage of the trigger 8 and the control lever 10.
  • the main part 60 thus delimits a cavity which opens to the outside of the cover 6 on the rear of the cover.
  • the shape and dimensions of the main part 60 are chosen as a function of the shape of the main body 4.
  • the cover 6 further comprises fixing elements 66 intended to allow the fixing of the cover 6 to the main body 4, preferably a fixing without degree of freedom.
  • the main body 4 also includes elements complementary to the fixing elements 66, for example in the form of recesses or recesses adapted to receive the fixing elements.
  • the fastening elements 66 are, for example, each provided with a hole 68 to receive a screw whose screwing is done here in the main body 4
  • the cover 6 further comprises a flange 72 formed at the base of the main part 60.
  • This flange 72 has a flat shape and extends around the entire periphery of the base of the main part 60.
  • the flange 72 is provided with support elements 70, or spacers, which are dimensioned to maintain the spacing E2 of the peripheral opening when the cover 6 is mounted on the main body 4. These support elements 70 are thus intended to come into contact with a corresponding surface of the main body 4 when the cover 6 is mounted on the main body 4.
  • the support elements 70 are here lugs formed integrally with the rest of the cover 6.
  • the fixing elements 66 are here formed projecting from the flange 72. They also come to bear on the central body 4 when the cover 6 is fixed, and therefore form support elements which act jointly with the support elements 70 .
  • the figure 6 illustrates a preferred embodiment of the filtering device 48.
  • the filtering device 48 comprises a gas diffuser 80, a metal filter 82 and an insulating screen 84 interposed between the gas diffuser 80 and the filter 82.
  • the diffuser 80, the filter 82 and the screen 84 are here aligned along of the X48 axis.
  • the diffuser 80, the filter 82 and the screen 84 are shown here separated from each other. However, in practice, when the filtering device 48 is in an assembled configuration, the diffuser 80, the filter 82 and the screen 84 are in contact in pairs.
  • the gas diffuser 80 forms an inlet of the filtering device 48 and has the role of spatially distributing the flow of breaking gas, so that at the outlet of the diffuser 80, the breaking gas is distributed homogeneously over the entire surface of the filter 82.
  • An example of the gas diffuser 80 is described in EP-1251530-A1 .
  • the role of the filter 82 is to cool and decontaminate the cut-off gas. It includes a stack of metallic fabrics of the “reps” type. An example of the filter 82 is described in the patent EP-0817223-B1 .
  • the screen 84 comprises a layer of electrically insulating material made of synthetic fibers, for example of the aramid type.
  • the screen 84 is made of the material under the Nomex® brand and marketed by the company DU PONT DE NEMOURS.
  • the screen 84 advantageously has a central recess 86.
  • This central recess 86 extends to an upper part 88 and to a lower part 90 of the screen 84.
  • the upper part 88 and the lower part 90 are provided with through holes 92 allowing the passage of the cutting gas.
  • the holes 92 are for example formed by cutting.
  • the central recess 86 is omitted and is replaced by through holes similar to the holes 92.
  • the upper 88 and lower 90 portions thus pierced with holes 92 allow the passage of the cutting gas by providing reinforced electrical insulation. The risk of the current being looped back into the ionized cut-off gas at the metal filter 82 is thus reduced.
  • the central recess 86 makes it possible to avoid excessively restricting the flow of the cutting gas.
  • the absence of holes 92 in the central part of the screen 84 is not detrimental, since it is mainly at the level of the lower parts 88 and upper 90 that the risk of looping of the current is greatest.
  • the efficiency of the filtering device 48 is improved, without increasing the level of ionization outside the circuit breaker 2, in particular with respect to live electrical conductors located in the immediate environment of the circuit breaker 2 while it is in operation.
  • the filtering device 48 contributes to further optimizing the evacuation and treatment of the breaking gases from the circuit breaker 2.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (10)

  1. Mehrpoliger Niederspannungsschalter (2) mit einem Formgehäuse, das einen Hauptkörper (4) und eine Abdeckung (6) beinhaltet, wobei die Abdeckung (6) am Hauptkörper (4) montiert ist und eine Hauptseite (22) des Hauptkörpers (4) bedeckt, wobei der Hauptkörper (4) in Innenabteile unterteilt ist, von denen jedes einem Pol (12, 14, 16) des Schalters (2) zugeordnet ist;
    wobei der Schalter (2) ferner für jeden Pol (12, 14, 16) im Innern des entsprechenden Abteils aufweist:
    - elektrische Kontakte (34, 38), die mit einem Schaltmechanismus des Schalters (2) trennbar sind;
    - eine Löschkammer (40), umfassend: einen Stapel (42) Lichtbogenlöschplatten, einen Funkenfänger (44), der den Stapel (42) überragt, und eine Löschgasaustrittsöffnung, die mit einer Filtervorrichtung (48) versehen ist;
    wobei der Schalter (2) dadurch gekennzeichnet ist, dass bei mindestens zweien der Pole (12, 14, 16) die Hauptseite (22) des Hauptkörpers (4) eine zusätzliche Öffnung (18, 20) aufweist, wobei jede zusätzliche Öffnung (18, 20) senkrecht über dem Funkenfänger (44) des entsprechenden Pols angeordnet ist und die Löschkammer (40) dieses Pols mit dem durch die Abdeckung (6) und die Hauptseite (22) begrenzten Innenraum in Verbindung bringt,
    und dadurch, dass die Abdeckung (6) am Hauptkörper (4) so befestigt ist, dass eine umfängliche Öffnung zwischen der Abdeckung (6) und dem Hauptkörper (4) über den Umfang der Abdeckung (6) verbleibt, wobei diese Öffnung den Innenraum mit dem Außenbereich des Gehäuses in Verbindung bringt.
  2. Schalter (2) nach Anspruch 1, dadurch gekennzeichnet, dass die umfängliche Öffnung eine Spaltbreite (E2) zwischen 0,3 mm und 1 mm aufweist.
  3. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Filtervorrichtung (48) einen Gasdiffusor (80), einen Metallfilter (82) und einen isolierenden Schirm (84) aus Kunstfasern aufweist, der zwischen den Gasdiffusor (80) und den Filter (82) gesetzt ist, wobei der Schirm (84) mit Durchgangslöchern (92) versehen ist, die in einem oberen Teil (88) und in einem unteren Teil (90) des Schirms (84) ausgebildet sind.
  4. Schalter (2) nach Anspruch 3, dadurch gekennzeichnet, dass der Schirm (84) ferner eine zentrale Ausnehmung (86) aufweist.
  5. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Löschkammer (40) Abweiser (50) aus Kunstfasern aufweisendem isolierendem Material aufweist, die vertikal beidseits des Eingangs der Löschkammer (80) eingebaut sind.
  6. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede zusätzliche Öffnung (18, 20) eine längliche Form aufweist.
  7. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Abdeckung (6) einen Flansch (72) aufweist, der mit Anlageelementen (66, 70) versehen ist, die so bemessen sind, dass sie die Spaltbreite (E2) der umfänglichen Öffnung über den Umfang der Abdeckung (6) konstant halten, wenn die Abdeckung (6) am Hauptkörper (4) des Gehäuses montiert ist.
  8. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Hauptkörper (4) aus duroplastischem Polyester ist und die Abdeckung (6) aus Polycarbonat ist.
  9. Schalter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die den Polen zugeordneten Innenabteile in dem Hauptkörper (4) nebeneinander angeordnet sind, wobei die beiden Abteile (12, 16), die zu dem in der Mitte der Anordnung gelegenen Pol benachbart sind, jeweils mit einer der zusätzlichen Öffnungen (18, 20) versehen sind, wobei das andere Abteil (14), das zwischen den beiden seitlichen Abteilen (12, 16) gelegen ist, keine zusätzliche Öffnung (18, 20) besitzt.
  10. Schalter (2) nach Anspruch 9, dadurch gekennzeichnet, dass der Schalter (2) ein dreipoliger Schalter ist, wobei das in der Mitte der Anordnung gelegene Abteil (14) keine zusätzliche Öffnung besitzt.
EP18208111.7A 2017-11-23 2018-11-23 Mehrpoliger niederspannungsschalter Active EP3489979B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1761100A FR3073974B1 (fr) 2017-11-23 2017-11-23 Disjoncteur multipolaire a basse tension

Publications (2)

Publication Number Publication Date
EP3489979A1 EP3489979A1 (de) 2019-05-29
EP3489979B1 true EP3489979B1 (de) 2020-04-15

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Application Number Title Priority Date Filing Date
EP18208111.7A Active EP3489979B1 (de) 2017-11-23 2018-11-23 Mehrpoliger niederspannungsschalter

Country Status (5)

Country Link
US (1) US10665403B2 (de)
EP (1) EP3489979B1 (de)
CN (1) CN109830392B (de)
ES (1) ES2787038T3 (de)
FR (1) FR3073974B1 (de)

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EP4177921A1 (de) * 2021-11-08 2023-05-10 ABB S.p.A. Niederspannungsschalterpol
KR102542180B1 (ko) * 2022-03-30 2023-06-14 오성기전 주식회사 직류 차단기의 아크 소호장치

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Publication number Publication date
ES2787038T3 (es) 2020-10-14
US20190157028A1 (en) 2019-05-23
EP3489979A1 (de) 2019-05-29
CN109830392A (zh) 2019-05-31
FR3073974B1 (fr) 2019-12-20
US10665403B2 (en) 2020-05-26
FR3073974A1 (fr) 2019-05-24
CN109830392B (zh) 2022-11-04

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