EP4273900A1 - Dispositif de commutation électrique - Google Patents

Dispositif de commutation électrique Download PDF

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Publication number
EP4273900A1
EP4273900A1 EP22171749.9A EP22171749A EP4273900A1 EP 4273900 A1 EP4273900 A1 EP 4273900A1 EP 22171749 A EP22171749 A EP 22171749A EP 4273900 A1 EP4273900 A1 EP 4273900A1
Authority
EP
European Patent Office
Prior art keywords
arc
contact
splitter
stack
switching device
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.)
Pending
Application number
EP22171749.9A
Other languages
German (de)
English (en)
Inventor
Zichi ZHANG
Stefan Valdemarsson
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP22171749.9A priority Critical patent/EP4273900A1/fr
Publication of EP4273900A1 publication Critical patent/EP4273900A1/fr
Pending 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
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • 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
    • H01H9/36—Metal parts
    • H01H2009/367—Metal parts defining a recurrent path, e.g. the subdivided arc is moved in a closed path between each pair of splitter plates

Definitions

  • the present disclosure generally relates to an electrical switching device for extinguishing an electric arc.
  • an electrical switching device of a rotating arc type In particular it relates to an electrical switching device of a rotating arc type.
  • a conventional approach to solve this problem is to introduce an arc chamber with several splitter plates where the arc, running from the main contacts into the arc chamber, will be divided into several short arcs in order to achieve an effective cooling and thereby withstand the fast rising recovery voltage.
  • the arcs are only allowed to move for short distances. They thereby become stationary and may therefore cause melting damages on the surface of each splitter plate. This melting has several negative consequences. For example, metal vapour in the post arc column will weaken the ability to withstand the recovery voltage. Moreover, the old foot point of the arc is still molten when recovery voltage is applied. The short post arc column will thereby not be cooled effectively. Additionally, melted craters and droplets from the surface of the splitter plates can cause short circuits between plates. Hence at higher currents, typically larger than 5-10kA, the gaps between plates have to be increased, leading to worsened recovery voltage withstand.
  • One solution to the above problem is to use a so-called rotating arc chamber.
  • One rotating arc chamber is disclosed in WO 2020/127401 , where a stack of splitter plates with loop structure are coaxially stacked between two drive coils.
  • an object of the present disclosure is to provide an electrical switching device which solves, or at least mitigates, the problems of the prior art.
  • electrical switching device comprising:
  • the moveable contact may, in the fully open position, be separated from the fixed contact by a first pre-determined distance and may in the fully open position be separated from the charge connection plate by a second pre-determined distance, where the second distance may be shorter than the first distance.
  • the charge connection plate may be located after the second end of the arc runner along the movement path from the closed to the fully open position.
  • the second end of the arc runner may be placed along the movement path so that the moveable contact makes contact with it when moving from the closed to the open position.
  • the charge connection plate may be placed along the movement path so that the moveable contact makes contact with it when moving from the closed to the open position.
  • the fixed contact may have a contact end for connection to a corresponding contact end of the moveable contact in the closed position and the movement path may be a movement path of the contact end of the moveable contact.
  • the arc runner may be configured to direct a first part of a main arc from the main contact arrangement to the stack of splitter plates to thereby split the first part of the main arc into a plurality of subarcs between the splitter plates and the at least one arc rotating coil may be configured to create a blowing magnetic field in the stack of splitter plates causing the subarcs to move circumferentially along the loop structures of the splitter plates.
  • the arc quenching circuit may be connected between the fixed contact and the charge connection plate.
  • the arc quenching circuit may additionally comprise a capacitor connected between the fixed contact and the charge connection plate. The capacitor may be uncharged when the moveable contact is in the closed position.
  • the arc splitting structure, arc runner and charge connection plate may be part of a discharge loop for the capacitor, where the discharge loop has an inductance that together with a capacitance of the capacitor forms a resonance frequency of the arc quenching circuit.
  • the capacitor may be connected in series with an inductor for obtaining resonance.
  • the arc quenching circuit may additionally comprise a surge arrester connected between the fixed contact and the charge connecting plate.
  • arc splitting structure there may be an arc rotating coil at the top of the stack electrically connected to the second outermost splitter plate and the arc runner. There may additionally be an arc rotating coil at the bottom of the stack electrically connected to the first outermost splitter plate and the fixed contact.
  • the splitter plates may be organized in arc chambers, where there maybe n arc chambers and (n+1) arc rotating coils in the stack, where n may be equal to or higher than two. There may additionally be an intermediate arc rotating coil between the splitter plates of each arc chamber.
  • a splitter plate at the bottom of an arc chamber may be electrically connected to the splitter plate at the top of a neighbouring arc chamber.
  • the arc rotating coils may be connected in the arc splitting structure in such a way that current directions around the central axis in two neighbouring arc rotating coils are opposite to each other.
  • the electrical switching device may be a contactor or a circuit breaker.
  • the invention has a number of advantages. Melting of arc plates is avoided.
  • the design has the additional advantage of utilizing the arc to connect the arc extinguishing circuit. This can be used to generate an injection current that provides current zero-crossing in sub-arcs in the stack. The device may because of this be made compact. If the distance between the charge connection plate and the moveable contact in the open position is sufficient, it is additionally possible that the moveable contact acts as a disconnector.
  • FIG. 1 shows an example of a first stack 10a that comprises three splitter plates 12, 14 and 16 and two arc rotating coils 18 and 20 forming a first arc splitting structure 10a for use in an electrical switching device.
  • Each splitter plate 12, 14 and 16 has a loop structure and is centred around a longitudinal axis AX.
  • the splitter plates 12, 14 and 16 may hence have through-openings formed by the loop structure.
  • the splitter plates are solid, i.e. without through-openings.
  • an inner distancing element and an outer distancing element arranged concentrically with the inner distancing element may be provided between each pair of adjacent splitter plates, forming the loop structure.
  • the splitter plates 12, 14, 16 are placed in the stack such that one splitter plate is a first outermost splitter plate 12 and another splitter plate is a second outermost splitter plate 14.
  • the first outermost splitter plate 12 is the outermost splitter plate on one side of the stack 10a.
  • the second splitter plate 14 is the outermost splitter plate on another opposite side of the stack 10a.
  • the first outermost splitter plate 12 may additionally be placed at the bottom of the stack 10a, while the second outermost splitter plate 14 may be placed at the top of the stack 10a.
  • the splitter plates 12, 14, 16 are stacked such that the loop structures are arranged coaxially along the axis AX.
  • the splitter plates 12, 14, 16 may additionally be stacked with an axial gap between each other.
  • the splitter plates 12, 14, 16 may be made of a non-ferrous, non-magnetic material such as copper or brass.
  • first outermost arc rotating coil 18 at the bottom of the stack 10a and a second outermost arc rotating coil 20 at the top of the stack 10a, where the first outermost arc rotating coil 18 is located below and electrically or galvanically connected to the first outermost splitter plate 12 (not shown) and the second outermost arc rotating coil 20 is placed at the top of the stack 10a above and electrically or galvanically connected to the second outermost splitter plate 14.
  • the first outermost arc rotating coil 18 is connected to the first outermost splitter plate 12 in such a way that a current running through it around the central axis AX is opposite to the direction of the current through the first outermost splitter plate 12.
  • the second outermost arc rotating coil 20 is in an analogous way connected to the second outermost splitter plate 14 in such a way that a current running through it around the central axis AX is opposite to the direction of the current through the second outermost splitter plate 14. How this may be done is described in more detail in WO 2020/127401 , which is herein incorporated by reference.
  • At least the splitter plates 12, 14, 16 of the stack 10a may be placed in an arc chamber. It is also possible that the arc rotating coils 18 and 20 are placed in the arc chamber. However, it is also possible that they are placed outside of it.
  • Fig. 2 shows a cross-sectional view of a second stack 10b of splitter plates and arc rotating coils forming a second arc splitting structure.
  • n groups of splitter plates and n+i arc rotating coils where n is an integer that is equal to or higher than two. n is with advantage three or four. In the example in fig. 2 n is equal to three.
  • Each group of splitter plates may additionally be enclosed in an arc chamber.
  • first outermost arc rotating coil 18 and a first outermost splitter plate 12 at the bottom of the stack 10b as well as a second outermost splitter plate 14 and a second outermost arc rotating coil 20 at the top of the stack 10b, where the first outermost arc rotating coil 18 is placed below the first outermost splitter plate 12 and the second arc rotating coil 20 is placed above the second outermost splitter plate 14.
  • first outermost arc rotating coil 18 is placed at the bottom of the stack 10b and the second outermost arc rotating coil 20 is placed at the top of the stack 10b.
  • first outermost splitter plate 12 is a splitter plate in a first group 25 of splitter plates in the stack 10b and the second outermost splitter plate is a splitter plate in a last group 27 of splitter plates in the stack 10b.
  • second group 26 of splitter plates in the stack above the first group 25 of splitter plates and below the last group 27 of splitter plates.
  • Each group of splitter plates is additionally separated from a neighbouring group of splitter plates by an intermediate arc rotating coil 28.
  • splitter plate at the bottom of such a group is electrically connected to a splitter plate at the top of a neighbouring group located below it. Both these splitter plates are additionally connected to the intermediate arc rotating coil placed between the two groups.
  • a splitter plate 22 at the bottom of the last group 27 is connected to a splitter plate 24 at the top of the second group 26 via an intermediate arc rotating coil 28, while a splitter plate 22 at the bottom of the second group 26 is connected to a splitter plate 24 at the top of the first group 25 via an intermediate arc rotating coil 28.
  • first outermost splitter plate 12 is separated from the splitter plate 24 at the top of the first group 25 by an intermediate splitter plate 16
  • the splitter plate 22 at the bottom of the second group 26 is separated from the splitter plate 24 at the top of the second group 26 by an intermediate splitter plate 16
  • the splitter plate 22 at the bottom of the last group 27 is separated from the second outermost splitter plate 14 by an intermediate splitter plate 16. It should here be realized that it is possible with more as well as fewer splitter plates in each group.
  • Each group of splitter plates is furthermore supposed to be enclosed in an arc chamber. There is thus a first, second and last arc chamber for the first, second and last groups of splitter plates 25, 26, 27.
  • a splitter plate at the bottom of an arc chamber is electrically connected to the splitter plate at the top of a neighbouring arc chamber (located below it in the stack) and where these two splitter plates are electrically connected to each other via an intermediate arc rotating coil.
  • An intermediate arc rotating coil 28 that separates two groups of splitter plates may be placed outside of or inside one of the arc chambers provided for the groups.
  • the first outermost arc rotating coil 18 can likewise be placed outside of or inside the arc chamber for the first group 25 of splitter plates and the second outermost arc rotating coil 20 can be placed outside of or inside the arc chamber for the last group 27 of splitter plates.
  • the current through neighbouring arc rotating coils run in opposite directions.
  • the current through the intermediate arc rotating coil 28 placed between the first and the second groups 25, 26 of splitter plates thus runs in an opposite direction to the current through the first outermost arc rotating coil 18.
  • the current through the intermediate arc rotating coil 28 placed between the second and the last groups 26, 27 of splitter plates thus runs in an opposite direction to the current through the intermediate arc rotating coil 28 placed between the first and the second groups 25, 26 of splitter plates.
  • the current through the second outermost arc rotating coil 20 runs in an opposite direction to the current through the intermediate arc rotating coil 28 placed between the second and the last groups 26, 27 of splitter plates.
  • Fig. 3 schematically shows an electrical switching device 29 that comprises the second arc splitting structure.
  • the switching device 29 may be a medium voltage direct current (MVDC) switching device for operation in an MV range of for instance 2-20 kV.
  • the switching device 29 comprises an arc runner 34 having a first and a second end 34a and 34b, a charge connection plate 36, an arc quenching circuit 44 comprising a surge arrester 46 in parallel with a capacitor 48 and having a first and a second end, a contact arrangement comprising a fixed contact 32 with a first contact end 32a and a moveable contact 30 with a second contact end 30a as well as a stack of arc chambers comprising n arc chambers 38, 40 and 42, one for each group of splitter plates).
  • MVDC medium voltage direct current
  • first arc chamber 38 for the first group of splitter plates a second arc chamber 40 for the second group of splitter plates and a last arc chamber 42 for the last group of splitter plates, where the first arc chamber 38 is electrically connected to the second arc chamber 40 and the second arc chamber 40 is electrically connected to the last arc chamber 42, where these connections are made through electrically interconnecting a splitter plate at the bottom of a group with a splitter plate at the top of a neighbouring group lower down in the stack.
  • first outermost splitter plate of the stack is electrically connected to the fixed contact 32 as well as to the first outermost arc rotating coil, while the second outermost splitter plate is connected to a first end 34a of the arc runner 34 as well as to the second outermost arc rotating coil.
  • the arc runner 34 may thereby be in direct mechanical contact with the second outermost splitter plate.
  • the arc runner 34 may also be integral with the second outermost splitter plate.
  • the moveable contact 30 of the main contact arrangement is moveable between a closed position in which the contact end 30a of it is in mechanical and electrical contact with the contact end 32a of the fixed contact 32 and a fully open position in which the contact end 30a of the movable contact 30 is separated from the contact end 32a of the fixed contact (at a pre-determined distance or location).
  • the first end of the arc quenching circuit 44 is connected to the first outermost splitter plate of the first arc chamber 38 as well as to the fixed contact 32.
  • the first end 34a of the arc runner 34 is connected to the second outermost splitter plate of the last arc chamber 42.
  • the arc runner 34 then runs beside the stack of splitter plates and the second end 34b is placed adjacent the contact end 32a of the fixed contact 32.
  • the second end 34 may more particularly be placed at a location that the contact end 30 of the moveable contact 30 passes when moving from the closed to the fully open position.
  • the second end 34b of the arc runner 34 is thus located along a path between the closed and a fully open position of the contact end 30a of the moveable contact 30.
  • the second end 34b of the arc runner 34 may additionally be placed along the movement path so that the contact end 30a of the moveable contact 30 makes contact with or is close to the second end 34b of the arc runner 34 when moving from the closed to the open position.
  • the charge connection plate 36 is also placed along the path between the closed and fully open position of the contact end 30a of the moveable contact30. It is more particularly placed after the second end 34b of the arc runner 34 in the path. It is thus placed closer to the fully open position than is the second end 34b of the arc runner 34.
  • the charge connection plate 36 is additionally electrically connected to the second end of the arc quenching circuit 44.
  • the contact end 30a of the moveable contact 30 makes electrical contact with the charge connection plate 36 as it passes it.
  • the charge connection plate 36 may thereby be placed along the movement path so that the contact end 30a of the moveable contact 30 makes contact with it when moving from the closed to the open position.
  • the moveable contact 30 may in the fully open position be separated from the contact end 32a of the fixed contact 32 by a first pre-determined distance and be separated from the charge connection plate 36 by a second pre-determined distance, where the second distance may correspond to the above-mentioned gap and may be shorter than the first distance.
  • the arc runner 34 is configured to direct a first part of a main arc initially generated between the moveable contact 30 and the fixed contact 32 when the movable contact 30 is moved from the closed to the fully open position, as subarcs to the stack of splitter plates in the arc chambers 38, 40, 42.
  • the charge connection plate 36 is in turn configured to provide an arc extinguishing current from the arc quenching circuit 44 to the arc chambers 38, 40, 42 via the arc runner 34 providing a current zero-crossing for the subarcs in the arc chambers 38, 40, 42 as well as to allow the surge arrester 46 to quench a second part of the main arc.
  • fig. 4-8 shows the movement of the movable contact 30 from the closed to the fully open position as well as the occurrence, splitting and quenching of arcs during the movement.
  • the capacitor 48 is initially uncharged. It does not have any voltage, which means that the potential at the second end of the arc quenching circuit 44 is the same as the potential at the first end. Also, the surge arrester 46 has a voltage level at which it is set to conduct. This voltage level is typically chosen to be somewhat higher than the voltage of the voltage source of the main circuit which is to be interrupted by the load switch.
  • a main arc is created between the fixed and the moveable contact 32, 30.
  • the contacting end 30a of the moveable contact 30 passes by and perhaps also makes mechanical contact with the second end 34b of the arc runner 34, the main arc commutates to the arc runner 34, as can be seen in fig. 4 .
  • the main arc is split, as can be seen in fig. 5 , into a first part between the arc runner 34 and the fixed contact 32 and a second part between the arc runner 34 and the moveable contact 30 where the second part may be between the second end 34b of the arc runner 34 and the contact end 30a of the moveable contact 30.
  • the first part may additionally be extended and run towards the arc chambers 38, 40 and 42.
  • the movable contact 30 As the movable contact 30 continues to move towards the fully open position it passes by the charge connection plate 36, where the contact end 30a of the moveable contact 30 may additionally connect with the charge connection plate 36 during this passage.
  • the first part of the main arc has now moved into the stack and is split into subarcs in the arc chambers 38, 40, 42, which subarcs are rotated by the arc rotating coils through the arc rotating coils creating a blowing magnetic field in the stack of splitter plates causing the subarcs to move circumferentially along the loop structures of the splitter plates.
  • the second part of the main arc has in turn moved so that it now connects the contact end 30a of the moveable contact 30 with the charge connection plate 36, which in turn causes the voltage of the arc chambers 38, 40, 42 to be applied across the capacitor 48.
  • the capacitor 48 is charged.
  • a charge current may thereby run in a loop from the first end of the arc quenching circuit 44 via the first, second and third arc chambers 38, 40, 42, the arc runner 34 and the charge connection plate 36 to the second end of the arc quenching circuit 44.
  • This current is additionally a resonance current, the frequency of which is determined by the capacitance of the capacitor 48 and the inductance of the loop.
  • the capacitor 48 thus starts to generate and inject an injection current into the arc chambers 38, 40, 42, which injection current runs from a first end of the capacitor 48 to the arc chambers 38, 40, 42 and then back to a second end of the capacitor 48 via the arc runner 34 and charge connection plate 36.
  • a current zero-crossing is injected into the loop which quenches the subarcs and the arc between the arc runner 34 and the charge connection plate 36.
  • the injected current thus creates a current zero-crossing in the arcs that rotate in the arc chambers 38, 40, 42, and thereby the current through the arc chambers is interrupted, as can be seen in fig. 7 .
  • the main current will continue to flow in the surge arrester 46 instead of the capacitor 48. This will continue for some milliseconds, depending on the time constant of the main circuit, until the energy stored in the main circuit is emptied into the surge arrester 46 and the main dc-current finally is interrupted. At the same time the residual arc between the contact end 30a of the moveable contact 40 and the charge 36 will extinguish.
  • the second part of the arc current passes from the moveable contact 30 to the surge arrester 46 via the charge connection plate 36 and is thereby quenched by the surge arrester 46 so that the current is eventually completely interrupted.
  • the moveable contact 30 then continues to the fully open position, as is shown in fig. 8 .
  • an MVDC load switch is provided using a number of serial rotating arc chambers, such as 3 - 4 stacked arc chambers each comprising a corresponding group of splitter plates, together with an arc quenching circuit comprising one or more non pre-charged capacitors and one or more surge arresters.
  • This design provides multiple rotating arc chambers that can have a higher voltage rating, for instance up to around 15kV, than a switch with a single, rotating arc chamber, where voltage rating of a design with a single arc chamber is typically around 4 or 5kV.
  • the design has the additional advantage of utilizing the arc to connect the capacitor of the arc extinguishing circuit and generate injection current that provides current zero-crossing in the sub-arcs of the arc chambers.
  • an uncharged capacitor may be used and therefore the capacitor may be made small, which allows the device to be compact. If the distance between the charge connection plate and the moveable contact in the open position is sufficient, it is additionally possible that the moveable contact also acts as a disconnector.
  • the rotation of the subarcs has the advantage of protecting the splitter plates from melting and thereby providing an excellent recovery voltage withstand capability.
  • the splitter plates may generally have any structure, preferably with rounded corners.
  • the splitter plates may hence for example be circular or polygonal with rounded corners.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP22171749.9A 2022-05-05 2022-05-05 Dispositif de commutation électrique Pending EP4273900A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22171749.9A EP4273900A1 (fr) 2022-05-05 2022-05-05 Dispositif de commutation électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22171749.9A EP4273900A1 (fr) 2022-05-05 2022-05-05 Dispositif de commutation électrique

Publications (1)

Publication Number Publication Date
EP4273900A1 true EP4273900A1 (fr) 2023-11-08

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EP22171749.9A Pending EP4273900A1 (fr) 2022-05-05 2022-05-05 Dispositif de commutation électrique

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EP (1) EP4273900A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932061A (en) * 1927-04-30 1933-10-24 Westinghouse Electric & Mfg Co Circuit breaker
US4079219A (en) * 1975-08-29 1978-03-14 I-T-E Imperial Corporation SF 6 Puffer for arc spinner
US6100491A (en) * 1999-06-25 2000-08-08 Eaton Corporation Electric current switching apparatus having an arc extinguisher with an electromagnet
US20160055999A1 (en) * 2014-08-21 2016-02-25 General Electric Company System and method for quenching an arc
EP3330992A1 (fr) * 2016-12-05 2018-06-06 ABB Schweiz AG Système de commutation électrique à courant continu
WO2020127401A1 (fr) * 2018-12-19 2020-06-25 Abb Schweiz Ag Système de commutation électrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932061A (en) * 1927-04-30 1933-10-24 Westinghouse Electric & Mfg Co Circuit breaker
US4079219A (en) * 1975-08-29 1978-03-14 I-T-E Imperial Corporation SF 6 Puffer for arc spinner
US6100491A (en) * 1999-06-25 2000-08-08 Eaton Corporation Electric current switching apparatus having an arc extinguisher with an electromagnet
US20160055999A1 (en) * 2014-08-21 2016-02-25 General Electric Company System and method for quenching an arc
EP3330992A1 (fr) * 2016-12-05 2018-06-06 ABB Schweiz AG Système de commutation électrique à courant continu
WO2020127401A1 (fr) * 2018-12-19 2020-06-25 Abb Schweiz Ag Système de commutation électrique

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