EP4107768A1 - Chambre de coupure à soufflage magnétique pour un appareil de coupure électrique et appareil de coupure électrique équipé d'une telle chambre - Google Patents
Chambre de coupure à soufflage magnétique pour un appareil de coupure électrique et appareil de coupure électrique équipé d'une telle chambreInfo
- Publication number
- EP4107768A1 EP4107768A1 EP21707166.1A EP21707166A EP4107768A1 EP 4107768 A1 EP4107768 A1 EP 4107768A1 EP 21707166 A EP21707166 A EP 21707166A EP 4107768 A1 EP4107768 A1 EP 4107768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cut
- zone
- interrupting
- carcass
- interrupting chamber
- 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
Links
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- 238000001816 cooling Methods 0.000 claims abstract description 8
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- 239000004020 conductor Substances 0.000 claims description 10
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- 229910045601 alloy Inorganic materials 0.000 description 1
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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
- H01H9/44—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
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- 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
- H01H33/10—Metal parts
-
- 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
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- 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
Definitions
- TITLE MAGNETIC BLOWING CUT-OFF CHAMBER FOR AN ELECTRIC CUT-OFF DEVICE AND ELECTRIC CUT-OFF DEVICE EQUIPPED WITH SUCH A CHAMBER
- the present invention relates to a magnetic blowing interrupting chamber for an electrical interrupting device, said chamber comprising a source of magnetic field, a magnetic casing and an interrupting zone in which an electric arc is liable to form during closing and / or reopening of a cutoff pole belonging to a cutoff device, said field source being arranged to generate a magnetic field intended to move said electric arc to stretch it and accelerate its cooling and extinction, said magnetic casing being arranged to channel said magnetic field, said cut-off pole comprising a fixed contact and a movable contact which moves relative to said fixed contact between a closed position and an open position on a path defining a cut-off plane, and said cut-off zone s 'extending at least in said cut-off plane.
- the present invention also relates to an electrical cut-off device equipped with such a magnetic-blown cut-off chamber.
- Magnetic blowing of the electric arc is a principle commonly used in breaking technologies to manage the electric arc which arises in particular when opening a breaking device in an electric circuit, with the aim of achieving a gain in breaking performance and preserve the integrity of the breaking device.
- the magnetic field which can be generated by any type of field source magnetic, allows the electric arc to be moved from its birth and to quickly stretch it to accelerate its cooling until it is extinguished.
- the cooling of the plasma of the electric arc has the effect of increasing its impedance, which makes it possible to increase the voltage of the electric arc during breaking.
- Cutting a direct current (DC) implies that the breaking device generates more voltage than the voltage of the network to be cut. This is the reason why the principle of magnetic blowing applies particularly well to the interruption of the DC current.
- a high voltage of the electric arc is also interesting for the breaking of an alternating current (AC) since it allows a limitation of the current during the breaking, having the effect of reducing the damage due to the arc, or even to reduce the time of the electric arc by a limiting effect. Consequently, this principle of magnetic arc blowing is just as interesting for DC currents as it is for AC currents.
- AC alternating current
- the applicant's publication FR 3 003 101 A1 proposes a principle of non-polarized magnetic blowing, which has the advantage of operating independently of the direction of the current in the breaking device.
- the interrupting chamber comprises a permanent magnet producing a magnetic field oriented in the plane of movement of the movable contacts with respect to the fixed contacts.
- the symmetry of the interrupting chamber with respect to this plane makes it possible to guarantee the non-polarization of this breaking principle.
- principles for channeling the magnetic field have already been proposed in the form of a flat ferromagnetic plate located at the rear of the permanent magnet or a U-shaped ferromagnetic plate which encompasses the rear and both sides of the magnet. Channeling the magnetic field in the cutoff area decreases the size of the permanent magnet.
- the field channeling obtained is not optimal.
- the publication EP 3 242 306 A1 attempts to respond to this lack by proposing another principle of magnetic blowing, in which the permanent magnet is polarized and its North and South poles are respectively coupled to two ferromagnetic plates, which extend parallel on either side of the cut-off zone and in the direction of an arc extinguishing chamber.
- This solution makes it necessary to polarize the magnet as a function of the direction of the current in the breaking device.
- the length of the air gap is important because it depends on the size of the breaking member and the length of the magnet.
- the magnetic interrupting chamber is insulating, surrounds one or two fixed contacts, and includes a window for the passage of one or two movable contacts. It also comprises an insulating central partition to create an annular channel promoting the circulation of air in one direction or the other, having the effect of preventing the rise in air pressure due to the temperature of the air. 'arc preventing magnetic stretching of the arc and its rapid extinction.
- One of the alternative embodiments comprises a U-shaped magnetic casing, arranged around the interrupting chamber and a polarized blowing magnet, in order to maximize the magnetic field in the interrupting zones.
- the length of the air gap is important because of the presence of the central partition and the annular air circulation channel. In fact, the air gap generates a large magnetic reluctance in the magnetic circuit which impairs the efficiency of the blowing.
- the publications US 2013/284702 and DE 10 2014 015061 propose arc extinguishing chambers in the form of U or V, made of fractionation sheets of magnetic material, and combined with two polarized permanent magnets, insulated, arranged the one opposite the other, on either side of the breaking zone, inside or outside the extinguishing chamber.
- a U-shaped magnetic casing is further arranged around the extinguishing chamber and the polarized blowing magnets.
- the air gap is large and generates a high magnetic reluctance in the magnetic circuit which adversely affects the efficiency of the blowing.
- the magnetic field which generates the magnetic blowing is often produced by permanent magnets of the Neodymium Iron Boron type. These magnets have the advantage of generating a strong magnetic field in their near environment, typically of the order of 0.2T. However, they are expensive and subject to variations in the price of the rare earths that constitute them.
- the present invention aims to respond to this demand by proposing a novel architecture of a magnetic blowing interrupting chamber making it possible to maximize the magnetic field, and therefore the magnetic blowing of the electric arc in the interrupting zone, to increase the breaking performance, while allowing to play on the cost, the volume and / or the nature of the source of field used.
- the invention relates to a magnetically blown interrupting chamber of the type indicated in the preamble, characterized in that said interrupting chamber has a shape that is predominantly symmetrical with respect to a median plane which coincides with said interrupting plane, in that said field source is disposed in the near environment and facing said cut-off zone, and is oriented to generating magnetic field vectors essentially parallel to said cut-off plane, in that said carcass surrounds said cut-off zone and said field source, and comprises a window open to the outside to allow passage of said movable contact, and in that said carcass is backed against said field source and closes in front of it to create an air gap in the magnetic circuit formed by said field source and said carcass, and thus maximize the magnetic field which passes through said cut-off zone.
- the smallest possible air gap is preferably chosen, because for the same field source, the smaller the air gap, the more the magnetic reluctance in the air is reduced, and the greater the magnetic excitation.
- said carcass may include an open peripheral wall delimiting said window which extends parallel to said cut-off zone, or a closed peripheral wall and an opening at at least one of the transverse ends of said peripheral wall. delimiting said window which in this case extends perpendicularly to said cut-off zone.
- Said interrupting chamber may also extend over a length greater than the length of said interrupting zone in said interrupting plane.
- said carcass advantageously comprises a peripheral wall partly open and partly closed, the open part delimiting said window which extends parallel to said cut-off zone, and the closed part extending said open part and delimiting a blowing chimney. for the extension of the electric arc.
- Said carcass may further include at least one transverse wall closing at least one of the transverse ends of said peripheral wall.
- the peripheral wall of said carcass may have a cross section of shape chosen from the group comprising a curved shape, a polygonal shape, a complex shape, a shape combining straight sections and curved sections, and in the case of a polygonal shape, it can be chosen from the group comprising a rectangle, an isosceles trapezoid, a C-shape whose ends form flaps oriented towards the outside or towards the inside of said cut-off zone, or else parallel to said cut-off zone.
- said field source can be chosen from the group comprising one or more permanent magnets, and one or more coils.
- said field source extends over an area substantially equal to the area of said interrupting chamber.
- the magnetic blow-off arc chute has an inner insulating envelope extending at least in part around said cutoff area to electrically isolate said field source and at least in part said carcass. It may also include an outer insulating envelope extending around said carcass.
- said carcass extends over a transverse dimension, perpendicular to the cut-off plane, to split said cut-off zone into an appearance zone in which the electric arc is born and at least one extinction zone in which the arc electric stretches and turns off.
- This transverse dimension may be at least equal to X times the transverse dimension of said zone of appearance, X possibly being between 2 and 10.
- the geometry of said interrupting chamber delimits a narrow and flattened interrupting zone to force the electric arc to flatten when it is moved by said magnetic field.
- said air gap created in the magnetic circuit formed by said field source and said carcass, is narrow in order to reduce the magnetic reluctance in the air and maximize the magnetic field which crosses said cut-off zone.
- said carcass may consist of a solid ferromagnetic part to channel the magnetic field, or of a stack of ferromagnetic fractionation sheets, extending in the longitudinal axis of said interrupting chamber, by means of a defined spacing, to simultaneously channel the magnetic field and split the electric arc, or even a combination of a solid part and a stack of splitting plates.
- Said carcass may further include a ramp arranged to narrow the thickness of the cut-off zone towards the end of said at least one extinguishing zone to further reduce said air gap.
- said magnetic blow-molding interrupting chamber may include ceramic insulating cheeks, superimposed at least in part on said inner insulating envelope, on either side of said interrupting zone.
- the invention also relates to an electrical switching device of the type indicated in the preamble, characterized in that it comprises a magnetic blow-off cutting chamber as defined above.
- said fixed contact may have the shape of a square, an internal branch of which extends inside said interrupting chamber in said median plane, and an external branch extending outside. of said interrupting chamber to form a connection terminal.
- the internal branch of said fixed contact may advantageously comprise a top positioned in a central part of said breaking zone, thus placing the zone of appearance of the electric arc in a central part of said interrupting chamber.
- the internal branch of said fixed contact may further include an enlarged base delimiting at least one heel oriented towards one end of said interrupting chamber. in one of the electric arc extinguishing zones.
- the splitting plate of said interrupting chamber, closest to said fixed contact can advantageously be connected to the potential of said fixed contact by said at least one bead.
- the splitting plate of said interrupting chamber furthest from said fixed contact, can be connected to the potential of said movable contact by an electrical conductor.
- the carcasses of said interrupting chambers can be coupled together by a common sheet replacing or added to the fractionating sheets furthest from said fixed contact, this common sheet which may or may not be connected to the potential of said movable contact by an electrical conductor.
- FIG. 1 is a perspective view of an interrupting chamber according to a first embodiment of the invention, combined with a pressure shutoff member in the closed position,
- FIG. 2 is a view similar to Figure 1 showing the switching device in the open position
- FIG. 3 is a longitudinal sectional view of the interrupting chamber of Figure 2 showing the magnetic blowing of the electric arc
- FIG. 4 is a cross-sectional view of the interrupting chamber of Figure 2 showing the electromagnetic force exerted by a magnetic field on the electric arc
- - Figure 5 is a view similar to Figure 4 showing the channeling of the magnetic field in said interrupting chamber
- FIG. 6 is a cross-sectional view of the interrupting chamber of Figures 1 and 2 isolated on the outside,
- FIG. 7 is a schematic top view of an interrupting chamber provided with a magnetic casing according to a first variant
- Figure 8 is a view similar to Figure 7 showing a magnetic casing according to a second variant
- Figure 9 is a view similar to Figure 7 showing a magnetic casing according to a third variant
- FIG. 10 is a view similar to Figure 7 showing a magnetic casing according to a fourth variant
- FIG. 11 is a view similar to Figure 7 showing a magnetic casing according to a fifth variant
- Figure 12 is a view similar to Figure 7 showing a magnetic casing according to a sixth variant
- FIG. 13 is a perspective view of an interrupting chamber according to a second embodiment of the invention, combined with a pressure interrupting member in the closed position,
- Figure 14 is a view similar to Figure 13 showing the switching device in the open position
- FIG. 15 is a sectional view of the interrupting chamber of Figure 14 showing the stretching of the electric arc by an electromagnetic force
- FIG. 16 is a perspective view of an interrupting chamber according to a third embodiment of the invention, combined with a pressure shutoff member in the open position,
- FIG. 17 is a perspective view of an interrupting chamber according to a fourth embodiment of the invention, in which the source of the magnetic field consists of an electrically supplied coil instead of a permanent magnet
- - Figure 18 is a cross-sectional view of an electrical switching device equipped with two interrupting chambers according to Figures 13 and 14,
- FIG. 19 is a perspective view of an interrupting chamber according to a fifth embodiment of the invention, combined with a sliding cutting member with a knife in the closed position,
- FIG. 20 is a view similar to Figure 19 showing the switching device in the open position
- FIG. 21 is a longitudinal sectional view of an electrical switching device equipped with two interrupting chambers according to Figures 19 and 20,
- FIG. 22 is an exploded view of an alternative embodiment of the interrupting chamber according to the invention, in which the magnetic carcass consists of fractionation sheets,
- FIG. 23 is an assembled view of the interrupting chamber of FIG. 22, showing various splitting plates constituting the carcass,
- FIG. 24 is a cross-sectional view of the interrupting chamber of FIG. 23 detailing the interrupting zone
- FIG. 25 is a longitudinal sectional view of the interrupting chamber of Figure 24 along the section plane C showing the magnetic blowing of the electric arc
- Figure 26 is a cross-sectional view similar to Figure 24 of an interrupting chamber comprising ceramic cheeks, and
- FIG. 27 is a plan view of an interrupting pole equipped with two interrupting chambers according to Figure 23, in which the last fractionating plate is connected to the potential of the moving contact,
- FIG. 28 is a plan view of an interrupting pole equipped with two interrupting chambers according to Figure 23, interconnected by a common upper sheet.
- the identical elements or parts bear the same reference numbers.
- the geometric positions indicated in the description and the claims such as “perpendicular”, “parallel”, “symmetrical” are not limited in the strict sense defined in geometry, but extend to geometrical positions which are close, that is to say say that accept a certain tolerance in the technical field considered, without influence on the result obtained. This tolerance is introduced in particular by the adverb “appreciably”, without this term necessarily being repeated before each adjective.
- the spatial indications given in the description and the claims such as “longitudinal”, “transverse”, “depth”, “upper”, “lower”, and so on. are based on the figures and are not limited to the examples shown.
- interrupting chamber 100, 110, 120, 130, 140 is intended to equip electrical interrupting devices 200, 300 which s' address all types of industrial, tertiary and domestic applications, supplied with direct current as well as alternating current, regardless of the nominal supply voltage.
- This interrupting chamber 100, 110, 120, 130, 140 can advantageously replace or supplement the traditionally known fractionation chambers depending on the desired breaking performance.
- the electrical breaking devices 200, 300 concerned can indifferently be a switch, a contactor, a switch, a change-over switch, a circuit breaker, or any other similar breaking device given that the interrupting chamber 100, 110, 120, 130 , 140 which is the subject of the present invention, can be compatible or adapted to any type of breaking device architectures.
- these electrical switching devices 200, 300 may include one or more PC switching poles, and each PC switching pole can be a single switching pole with a single fixed contact CF cooperating with a single mobile contact CM, or a single switching pole. double cut-off pole with two fixed contacts CF cooperating with a movable contact CM, as shown in Figures 18, 21 and 27.
- the movable contacts CM are arranged to be moved relative to the fixed contacts CF and the trajectory in which the mobile contacts CM move defines a cut-off plane P, which this movement is either a translation (represented by the arrow T) or a rotation (not shown).
- a translation represented by the arrow T
- a rotation not shown.
- PC cut-off pole architecture There are also several types of PC cut-off pole architecture depending on whether they include pressure contacts in accordance with Figures 1 to 3, 13 to 16, 18, and 22 to 28, sliding contacts in accordance with Figures 19 to 21, pressure contacts with cam control, and any other type of electrical contact.
- the interrupting chamber 100 is substantially rectangular and arranged to delimit an interrupting zone Z in which an electric arc E is liable to form, in particular during the opening of a PC cut-off pole belonging to an electrical cut-off device, and to be turned off as quickly as possible.
- It comprises for this purpose a field source 2 arranged to generate a magnetic field B intended to move said electric arc E to stretch it and accelerate its cooling and its extinction, a magnetic casing 3 arranged to channel the magnetic field B in general. and more particularly in the cut-off zone Z, and an inner insulating envelope 4 arranged to electrically isolate the cut-off zone Z and consequently the electric arc E from the field source 2 and from the carcass 3.
- This inner insulating envelope 4 can be produced by any electrically insulating material, or even also gas-generating material, also having the effect of absorbing the thermal energy of the electric arc E, promoting its cooling and consequently its extinction.
- the interrupting pole PC is represented in the figures by a fixed contact CF arranged inside the interrupting chamber 100 and a movable contact CM placed partly inside the interrupting chamber 100 opposite the fixed contact CF and partly outside the interrupting chamber to be controlled by an actuating mechanism 201, 301 (fig. 18, 21).
- This example of an arrangement is not limiting and extends to any other type of arrangement which depends on the architecture of the cut-off pole PC.
- the fixed contact CF is not necessarily housed inside the interrupting chamber, but can be partly housed there, or placed nearby.
- the actuating mechanism is known per se and is not the subject of the invention. It can be driven by a translational and / or rotational movement controlled manually and / or automatically.
- the cut-off zone Z extends at least in the cut-off plane P and corresponds at least to the space defined between the open position and the closed position of the cut-off pole PC.
- the fixed CF and movable CM contacts commonly include contact pads (not shown) between which the current is established, made of conductive materials with high thermal resistance.
- the interrupting chamber 100, 110, 120, 130, 140 has a shape that is predominantly symmetrical with respect to a median plane A which coincides with the cut-off plane P.
- This symmetry advantageously eliminates the need for polarity of the field source 2 which will always fulfill its function whatever the direction of the current in the PC cutoff pole.
- it can also have an asymmetric shape depending on the architecture of the PC cutoff pole, without however calling into question the fact that it can be free from the polarity of the field 2 source.
- the interrupting chamber 100, 110, 120, 130, 140 extends over a longitudinal dimension, parallel to the median plane A, which extends at least between the closed position (fig. 1) and the open position ( Fig. 2) of the movable contact CM of said cut-off pole PC. And, the interrupting chamber 100, 110, 120, 130, 140 extends over a transverse dimension L2, perpendicular to the median plane A, which protrudes from one side or both sides of the interrupting pole PC.
- the zone of appearance Za is located at the level of the cut-off pole PC and overlaps the cut-off plane P.
- the zone or zones of extinction Ze are contiguous and peripheral to the zone of appearance Za.
- the transverse dimension L2 is for example at least equal to X times the transverse dimension L1 of the zone of appearance Za, X being between 2 and 10, without this coefficient being limiting.
- the interrupting chamber may have only one extinction zone Ze on one side of the appearance zone Za.
- the Ze extinguishing zone (s) may further include fins (not shown) in a non-magnetic material, such as copper, ceramic, plastics or the like, to create baffles and to split the air. electric arc E in order to accelerate its extinction.
- the field source 2 is placed in the near environment and facing the cutoff zone Z.
- the field source 2 has a large surface area since it substantially covers the entire surface of the cutoff chamber 100, 110, 120, 130, 140. It extends over a longitudinal dimension, along an axis parallel to the median plane A, and preferably covers the entire cut-off zone Z. And, it extends over a transverse dimension, along an axis perpendicular to the plane median A, and also and preferably covers the entire cut-off zone Z. It is further oriented perpendicular to the cut-off plane P, to generate a magnetic field B in the direction of the cut-off zone Z such that the field vectors magnetic fields are essentially parallel to the cut-off plane P.
- the field source 2 may consist of one or more permanent magnets 20, or any other equivalent system capable of generating a magnetic excitation, such as an electrically supplied coil 21 (FIG. 17).
- the field source 2 has a planar, parallelepipedal shape, without this shape being limiting.
- it may consist of a plurality of parallelepipedal permanent magnets 20 arranged side by side on a curved line, or of a permanent magnet 20 molded into a curved shape.
- the shape of the carcass 3 is adapted to the shape of the field source 2.
- the permanent magnet 20 is an independent North-South magnet, defined by two faces of opposite polarities and parallel to each other, generating a magnetic field B which closes on itself.
- the face which corresponds to the North pole N called the front face
- the cut-off zone Z is positioned opposite the cut-off zone Z to create a magnetic field B or a magnetic excitation vector which leaves its North pole N and closes on its South pole S corresponding to its opposite face, called the rear face via the carcass 3.
- This magnetic field B is concentrated in the cut-off zone Z. Its field lines describe loops essentially parallel to a transverse plane corresponding to the cutting plane of the FIGS. 4 to 6.
- the field lines are also essentially parallel to the cut-off plane P in said cut-off zone Z, and are in fact essentially perpendicular to the current I flowing between the fixed contact CF and the mobile contact CM of the cut-off pole PC.
- the principle of magnetic blowing is explained later with reference to Figures 3 to 5.
- the magnetic carcass 3 has a rectangular shape, with reference to FIGS. 1 to 6, it being specified that in reality, rounded angles will be preferred to the right angles to facilitate the circulation of the magnetic field B.
- the carcass 3 is made of a ferromagnetic material, magnetic or any other equivalent material with high magnetic permeability allowing it to fulfill its function of channeling the magnetic field B.
- the casing 3 surrounds the cut-off zone Z and the field source 2 as closely as possible, and includes at least one window 35 open to the outside to allow the mobile contact CM of the cut-off pole PC to pass. .
- the carcass 3 comprises a peripheral wall 30 which is closed at one of its ends by a transverse wall 31 and open at the other of its ends allowing in particular the evacuation of the gases from the 'electric arc E. It could not have a transverse wall 31 and be open right through, or on the contrary have two transverse walls closing its two ends to optimize the confinement of the electric arc E, and this depending on the specifications of the charges of each interrupting chamber.
- the peripheral wall 30 of the carcass 3 comprises a rear face 32, two lateral faces 33, and a front face 34 comprising said window 35.
- the window 35 extends, in this variant, over the entire longitudinal dimension of the interrupting chamber. 100, centered on the median axis A.
- the rear face 32 of the carcass 3 is preferably parallel and adjoining the rear face of the field source 2 so as not to create an air gap. It also has a length greater than the length of the field source 2 to prevent the ends of the field source 2 from coming into contact with the side faces 33 of the casing 3 and thus prevent any risk of a magnetic short circuit. with the field source 2.
- the front face 34 of the casing 3 closes on the front face of the field source 2 by leaving an air gap D2 in the magnetic circuit formed by said field source 2 and said casing 3.
- the front face 34 comprises two flaps 34a, 34b which extend parallel to the rear face 32 of the carcass 3, and delimits with the front face of the field source 2 a volume of air in which the zone takes place. cutoff Z.
- This volume of air which forms said air gap D2 is crossed by the field lines B which leave the North pole N of the field source 2, cross the cutoff zone Z and loop back to the South pole S of the field source 2 by being channeled by the flaps 34a, 3 4b of the front face 34, the side faces 33 and the rear face 32 of the carcass 3.
- We will therefore choose an air gap D2 of the smallest possible length to minimize the magnetic reluctance of the air thickness. crossed by the field lines and thus maximize the magnetic field B in the cut-off zone Z.
- the length of the air gap D2 can be determined as a function of the volume of the cut-off zone Z, itself partly a function of the size of the PC cut-off pole.
- the interrupting chamber 100 represented in FIG.
- FIG. 1 corresponds to a closed position of the interrupting pole PC in which the mobile contact CM is closed on the fixed contact CF allowing the circulation of a current I in an electrical circuit.
- FIG. 2 corresponds to an open position of the cut-off pole PC in which the movable contact CM is separated from the fixed contact CF preventing the circulation of said current I.
- Figure 3 which is a longitudinal sectional view of the interrupting chamber 100, makes it possible to visualize the position of the electric arc E when it appears (El) in which it extends substantially vertically between the fixed contact CF and the movable contact CM in the cut-off plane PC and in said zone of appearance Za, then its position after having been magnetically blown (E2) in which it is deformed and stretched in the direction of one of the side faces 33 of the carcass 3 outside the cut-off plane PC and in one of said extinction zones Ze.
- the electromagnetic forces F at stake for this magnetic blowing are represented by the vectors F.
- FIG. 4 represents a cross-sectional view of the blowing chamber 100 showing the electric arc E in which a current I flows, the magnetic field generated by the field source 2 represented by the vector B and the electromagnetic force generated by the magnetic field B on the current I represented by the vector F.
- the dotted zone in FIG. 4 represents the cut-off zone Z, delimited by the internal insulating envelope 4, in which is managed the electric arc E, covering the zone of appearance Za and the two zones of extinction Ze.
- the interrupting zone Z is narrow, flattened and transversely elongated, having the effect of constraining the electric arc E during its displacement at flatten, which tends to cool it more. Indeed, by flattening, the electric arc E offers a larger exchange surface (oval shape of the arc) with the insulating wall 4 which is very close.
- the symmetry of the interrupting chamber 100 with respect to the interrupting plane P induces invariable performance according to the direction of the current I and therefore according to the direction of blowing of the electric arc E whether it is towards the right or towards the left in FIG. 4.
- this symmetry according to the cut-off plane P coincident with the median plane A, can accept a certain tolerance, therefore a certain asymmetry, without harming either the operation or the efficiency of the magnetic chamber 100, in accordance with the exemplary embodiment illustrated in FIG. 21
- the effect of the channeling of the magnetic field B obtained by the presence of a magnetic carcass 3 is represented only in the right part of FIG. 5, by the magnetic field lines B which exit from the North pole N of the field source 2, pass through a portion in the air that is as short as possible due to the short length of air gap D2, then concentrate in carcass 3 via the shortest path to close in a loop on the South Pole S of the field source 2.
- the combination of the casing 3 allowing the magnetic flux to be channeled and the narrowest possible air gap D2 makes it possible to concentrate and maximize the magnetic field B which crosses the cut-off zone Z to optimize the management of the electric arc E from its birth in the zone of appearance Za until its disappearance in the zone or zones of extinction Ze in the direction of the side faces 33 of the carcass 3.
- FIG. 6 illustrates in cross section a variant of the interrupting chamber 100 completed by an outer insulating envelope 5 arranged to electrically insulate the carcass 3 with respect to the external environment.
- the outer insulating casing 5 can be made of an electrically insulating material, or even also gas-generating, molded or injected, such as for example plastics, composites or ceramics. If it is a material which can be molded, the latter can be overmolded all around the carcass 3 simultaneously forming the inner insulating casing 4 and the outer insulating casing 5.
- FIGS. 1 to 6 The principle of channeling described with reference to FIGS. 1 to 6 is not only limited to the geometry of the carcass 3 described above.
- Figures 7 to 12 illustrate other geometries implementing the same physical principle.
- the interrupting chamber 100 is represented only by its casing 3 and its field source 2, and is available in six variant embodiments.
- the peripheral wall 301 of the carcass 3 is more open than the preceding peripheral wall 30, and comprises a front face 341 comprising two flaps 341a and 341b oriented outwards to increase the volume of the cut zone Z
- this volume can contain larger plasmas, in particular in the case of strong I currents, and / or a larger Z cutoff zone adapted to the size of the PC cutoff pole.
- the peripheral wall 302 of the carcass 3 comprises a front face 342 comprising two flaps 342a and 342b oriented outwardly, as in the previous example, but whose ends 342a 'and 342b' are curved towards the outside. 'outside and face each other on either side of the window 35 to channel the magnetic flux at the entrance to the cut-off zone Z.
- a front face 342 comprising two flaps 342a and 342b oriented outwardly, as in the previous example, but whose ends 342a 'and 342b' are curved towards the outside. 'outside and face each other on either side of the window 35 to channel the magnetic flux at the entrance to the cut-off zone Z.
- the peripheral wall 303 of the carcass 3 comprises a front face 343 comprising two flaps 343a and 343b oriented outwards, but whose ends 343a 'and 343b' are curved parallel to the rear face 32, to channel the magnetic flux at the entrance to the cut-off zone Z, and increase the magnetic field in the Ze extinguishing zones of the interrupting chamber.
- the peripheral wall 304 of the carcass 3 comprises a front face 344 comprising two flaps 344a and 344b oriented inwardly, to generate more magnetic field at the center in the area. of appearance Za, that at the ends in the extinction zones Ze of the cut-off zone Z.
- FIG. 10 the peripheral wall 303 of the carcass 3 comprises a front face 343 comprising two flaps 343a and 343b oriented outwards, but whose ends 343a 'and 343b' are curved parallel to the rear face 32, to channel the magnetic flux at the entrance to the cut-off zone Z, and increase the magnetic field in the Ze
- the peripheral wall 305 of the carcass 3 comprises a front face 345 comprising two flaps 345a and 345b oriented towards the 'inside, as in the previous example, but whose ends 345a' and 345b 'are curved outwards, to channel the magnetic flux at the entrance and generate more magnetic field in the zone of appearance Za than' at the ends in the extinction zones Ze of the cut-off zone Z. It is also possible to add additional magnets in the cut-off chamber 100, such as permanent magnets 20 'on the back of the flaps 34a, 34b of the front face 34, facing the main permanent magnet 20, to further maximize the magnetic field in the extinction zones Ze of the cut-off zone Z.
- FIGs 13 to 15 illustrate a second embodiment of an interrupting chamber 110 according to the invention, which differs from that shown in Figures 1 to 6, by a longitudinal dimension much greater than the longitudinal dimension of the interrupting pole PC to create in the cut-off zone Z an additional Ze extinguishing zone, in the form of a blowing chimney 6.
- the casing 3 comprises for this purpose a peripheral wall 30, the lower part of which is open and the upper part of which is closed.
- the open lower part comprises the window 35 for the passage of the movable contact CM, which extends in the cut-off plane P.
- the closed upper part delimits the blowing chimney 6 favoring the stretching and extinction of the electric arc. E up.
- the interrupting chamber 110 is illustrated in the closed position in FIG. 13 then in the open position in FIG. 14.
- the fixed contact CF has been widened, in order to allow guiding of the foot of the electric arc E towards the end of the interrupting chamber 110, in one of the extinguishing zones Ze, to spare the pellet of contact of the fixed contact CF of the degradation by the electric arc E.
- the peripheral wall 30 of this interrupting chamber 110 can be closed at one or both ends by a transverse wall (not shown) to further confine the electric arc E.
- Figure 16 illustrates a third embodiment of an interrupting chamber 120 according to the invention, which differs from that shown in Figures 1 to 6, by a carcass 3 consisting of a closed peripheral wall 30, the ends of which transverse are open and each have a window 35 for the passage of the mobile contact CM.
- the mobile contact CM completely enters the interrupting chamber 120 through one of its transverse ends, which makes it possible to provide an interrupting chamber 120 which is completely closed magnetically, to further maximize the magnetic field B and obtain maximum efficiency of the magnetic blowing. in the cut-off zone Z.
- the permanent magnet 20 of the field source 2 is replaced by a coil 21 supplied with a current making it possible to generate a magnetic field B in the cut-off zone Z.
- the field source 2 can include more than one coil 21 and all the variants and variations described or suggested in connection with the previous solution provided with one or more permanent magnets can be transposed to this embodiment.
- FIG. 18 illustrates in cross section an electrical switching device 200 showing the installation of two interrupting chambers 110 according to FIGS. 13 and 14 in a double PC breaking pole, that is to say comprising two fixed contacts CF and two movable contacts CM aligned in the cut-off plane P.
- the cut-off device 200 shown is simplified as much as possible because it does not form part of the invention as such. It may include one or more PC cutoff poles assembled side by side in one and the same box 7 or in juxtaposed individual boxes, the electrical contacts of which operate in a cutoff plane P. This is in this example. pressure contacts, the fixed contacts CF of which are extended by a connection terminal 8, and the movable contacts CM are carried by a movable assembly 9 controlled in translation T in the cut-off plane P by an actuator (not shown).
- FIGS. 19 and 20 illustrate the interrupting chamber 100 of FIGS. 1 to 6 declined to a PC interrupting pole with sliding contacts.
- the fixed contact CF consists of a blade, also called a knife, extending in the cut-off plane P and the movable contact CM consists of a double blade, generally secured by a return member (not shown), and arranged to fit by sliding on the blade of the fixed contact CF.
- FIG. 21 illustrates in cross section an electrical breaking device 300 showing the layout of two interrupting chambers 100 according to FIGS. 6, 19 and 20 in a double PC breaking pole, that is to say comprising two fixed contacts CF and two movable contacts CM aligned in the cut-off plane P.
- the cut-off device 300 shown is simplified as much as possible because it does not form part of the invention as such. It may include one or more PC cut-off poles assembled side by side in one and the same box 7 or in juxtaposed individual boxes, the electrical contacts of which operate in a cut-off plane P. In this example, they are sliding contacts. , whose fixed contacts CF are extended by a connection terminal 8, and the movable contacts CM are carried by a movable assembly 9 controlled in translation T in the cut-off plane P by an actuator (not shown).
- Figures 18 and 21 show very clearly the interest of the interrupting chamber 100, 110, 120, 130 according to the invention and its ease of integration into any breaking device 200, 300 as close as possible to the fixed contacts CF since it is positioned at least in part around them, thanks to its flat geometry and its restricted volume.
- the interrupting chamber 140 illustrated in Figures 22 to 28 has a shape similar to the interrupting chamber 110 illustrated in Figures 13 to 15, i.e. a longitudinal dimension much greater than the longitudinal dimension of the interrupting pole.
- PC to create, in the cut-off zone Z, an additional Ze extinguishing zone in the form of a blowing chimney 6.
- the interrupting chamber 140 differs from the preceding interrupting chambers 100, 110, 120, 130, by a magnetic carcass 40, consisting no longer of a solid part, but of a stack of fractionation sheets 41, also called deionization sheets.
- this breaking chamber 140 has the advantage of combining several technical effects: the channeling of the magnetic field B produced by the field source 2, the greatest possible elongation of the electric arc E and in addition the fractionation of the electric arc E in a multitude of small arcs in order to multiply the arc voltage due to the anode / cathode phenomenon, allowing a faster cut-off of the current.
- the splitting plates 41 each extend in a plane perpendicular to the cut-off plane P, have a small thickness compared to the other two dimensions, and a section equal to the section of the carcass 40. In the example shown, this section has a general shape of a rectangular frame.
- the carcass 40 consists of two series of fractionation plates: a first series of fractionation plates 41a, 41 'a located in the open lower part of the carcass 40, forming a peripheral wall 30 open to the right of the window 35, and a second series of fractionation plates 41b, 41 'b in the closed upper part of the carcass 40, forming a closed peripheral wall 30.
- the distribution of the fractionation sheets can be 2/3 for the open sheets and 1/3 for the closed sheets, without this example being limiting.
- the reference numeral 41 used in the description and the claims makes it possible to identify the splitting plates regardless of their shape and their location in the carcass 40.
- the fractionation sheets 41 are preferably made of a ferromagnetic or magnetic material or any other material equivalent to high Magnetic permeability allowing the carcass 40 to fulfill its function of channeling and amplifying the magnetic field B in the cutoff zone Z, as in the carcass 3 of the cutoff chambers 100, 110, 120, 130 described above.
- the fractionation sheets 41 are stacked one on top of the other with a defined spacing, regular or not. The direction of the stacking is parallel to the median plane A of the interrupting chamber 140.
- the carcass 40 comprises for this purpose two lateral flanges 42, to hold the dividing plates 41 between them, and to define said spacing.
- the flanges 42 extend parallel to the median plane A, and include orifices 43 for receiving protruding pins 44 provided on the lateral sides of the sheets. Of course, any other means of attachment or type of mounting may be suitable.
- the field source 2 comprises a permanent magnet 20 of thickness D1, leaning against the frame 40, which closes in front of it to create an air gap D2 as narrow as possible, while entirely encompassing the cut-off zone Z.
- L ' magnet 20 has a parallelepipedal shape, adapted to the shape of the interrupting chamber 140. It has a large surface area, since it covers substantially the entire surface of the interrupting chamber 140, making it possible to lengthen the electric arc E as much as possible.
- This magnet 20 may be of the ferrite type in order to reduce the costs of the interrupting chamber 140, without this example of material being limiting.
- the magnet 20 is isolated from the zones of appearance Za and extinction Ze of the electric arc by means of an insulating case 45, in which it is housed entirely.
- the electric arc E subjected to the magnetic field B will therefore be blown laterally into the sides of the interrupting chamber 140 to allow its elongation.
- the casing 40 is partially isolated from the zones of appearance Za and extinction Ze of the electric arc, by means of an insulating wall 46, which does not cover the ends of the extinction zones Ze to allow the arc electric E to split up in the stack of splitting sheets 4L
- the insulating wall 46 is positioned at the entrance to the cut-off zone Z, on either side of the window 35, facing the insulating box 45.
- This insulating wall 46 can be extended around the perimeter of window 35 to protect the edges of the splitting plates 41a, 41 'a.
- the insulating case 45 and the insulating wall 46 are assembled by interlocking tabs 47, which form spacers guaranteeing the air gap D2 and the thickness of the cut-off zone Z.
- This cut-off zone Z therefore extends laterally into the non-insulated fractionation plates 41, allowing the fractionation of the electric arc E as shown in Figure 25.
- the insulating casing 45 and the insulating wall 46 are similar to the interior insulating casing 4 provided in the previous interrupting chambers 100, 110, 120, 130, without however isolating the ends of the Ze extinguishing zones to allow the electric arc to split in the fractionation plates 41.
- the interrupting chamber 140 can be protected on the outside by an outer insulating envelope 5, as described above.
- the cut-off pole PC is double and has two fixed contacts CF cooperating with a movable pressure contact CM (FIGS. 22 and 27).
- the fixed contacts CF and the movable contact CM commonly comprise contact pads (not shown) between which the current is established, made of conductive materials with high thermal resistance.
- the movable contact CM moves in translation along the double arrow T in a cut-off plane P, which is vertical in the figures, by means of a movable assembly (not shown).
- the fixed contract CF has a square shape, including an internal branch, vertical in the figures, extending inside the interrupting chamber 140, and a branch external, horizontal in the figures, forming a connection terminal 8 extending outside the interrupting chamber 140.
- the internal branch of the fixed contact CF extends in the direction of the blowing chimney 6 and its top 48 bearing a contact pad (not shown) stops substantially in a central part of the cut-off zone Z, thus moving the contact zone, and therefore the zone of appearance Za of the electric arc, from one end to one central part of the interrupting chamber 140.
- the internal branch of the contact fixed CF comprises a widened base delimiting two heels 49 oriented in the direction of the carcass 40 and in electrical contact with the first splitting plate 41 of the carcass 40. This electrical contact can be direct, as the example shown in FIG. 25, or via an electrical conductor (not shown).
- the internal branch of the fixed contact CF may have a substantially triangular shape, as in the example shown, a bar shape or any other geometric shape or not.
- the particular geometry of the fixed contact CF allows a significant gain in fractionation and in elongation of the electric arc E as explained with reference to FIG. 25.
- this solution generates a significant length of the interrupting chamber 140, therefore a magnet 20 large and expensive.
- a single fixed CF contact which is placed at one end of the interrupting chamber 140, such as those described with reference to the interrupting chambers 100, 110, 120, 130 described above, may of course be suitable.
- FIG. 24 is a cross section of the interrupting chamber 140, which shows an interrupting zone Z in which the magnetic blowing takes place, the principle of which is explained with reference to FIG. 4.
- the interrupting zone Z is very flattened and the magnetic reluctance is reduced to its maximum, thanks to the fact that the thickness of the cut-off zone Z narrows in the extinction zones Ze in the direction of the 4L fractionation plates.
- 'electric arc E of the magnet 20 by reducing the space available for its deployment in the air gap D2, therefore bringing it as close as possible to the magnetic field B as it progresses towards the fractionation sheets 4L A
- the carcass 40 consists of the fractionation plates 41 ′ a and 41 ′ b, illustrated in FIG. 23, comprising a ramp 52 at the rear of the front face 34 increasing in the direction of the side faces 33.
- the central position of the zone of appearance Za of the electric arc allows complete freedom for this electric arc E to be stretched and lengthened over the entire height of the interrupting chamber 140 and over the entire width of the corresponding extinguishing zone Ze, and thus to reach a large number of fractionation sheets 41.
- the electric arc E1 quickly leaves the contact zone of the fixed CF and movable CM contacts by moving to the right in the figure, directly from the splitting plates 41. At the same time, it moves towards the rear of the movable contact CM to extend upwards in the blowing chimney 6, towards the base of the fixed contact CF to extend towards the bottom of the the cut zone Z, and laterally into the fractionation plates 41.
- the heel 49 of the enlarged base of the fixed contact CF in electrical contact with the first fractionation plate 41 of the carcass 40 further allows rapid removal of the electric arc El of the contact zone of the fixed CF and mobile contacts CM, and a guide of the foot of the electric arc E towards the end of the interrupting chamber 140, in one of the extinguishing zones Ze, and as far as the fractionation plates 41.
- the geometry of the fixed contact CF thus makes it possible to spare the contact pad from degradation by the electric arc E and also allows the electric arc E to reach the fractionation plates 41 in the part. bottom of the interrupting chamber 140.
- the complete stacking of the fractionation sheets 41 participates in the fractionation and the rapid extinction of the electric arc E.
- FIG. 26 illustrates a variant of the interrupting chamber 140 comprising complementary insulating cheeks 50, added in the interrupting zone Z, and superimposed respectively on the insulating casing 45 and on the insulating wall 46.
- These insulating cheeks 50 are therefore in contact with the zones of appearance Za and extinction Ze of the electric arc. They can advantageously be produced in a ceramic, such as an alumina alloy, which has advantageous properties for extinguishing the electric arc.
- the interrupting chamber 140 will degrade less quickly, and will be able to withstand a greater number of maneuvers.
- any other material having similar properties may be suitable.
- FIG. 27 illustrates a complete PC breaking pole comprising two breaking chambers 140 arranged around the two fixed contacts CF and through which circulates a movable contact CM moved in the switching plane P symbolized by the double arrow T.
- the last splitting plate 41 of each of the interrupting chambers 140 that is to say the one furthest from the fixed contact CF, is connected to the potential of the mobile contact CM by an electrical conductor 51, for example a flexible braid, a spring member, or the like.
- the technical effect of this assembly is to stabilize the electric arc in the splitting plates 41, in order to further increase the breaking performance by accelerating the extinction of the arc.
- Figure 28 is a variant of Figure 27, in which the carcasses 40 of the interrupting chambers 140 are coupled together by a common plate 53 replacing or added on the last splitting plates 41, that is to say those the furthest from the fixed contact CF.
- a single electrical conductor 51 is sufficient to connect the common sheet 53 to the potential of the mobile contact CM. It would even be possible to do without this electric conductor 51, making it possible to reduce the cost price and the complexity of this variant, if the two electric arcs E of the two interrupting chambers Z switch to this common sheet 53. In this case In this case, the electric potential of the mobile contact CM would be displaced on this common sheet 53 and the mobile contact CM would become “floating”. This solution would make it possible, among other things, to reduce the wear of the contact pads and to stabilize the electric arcs E in the fractionation plates 41.
- the invention meets the objectives set, namely an optimized solution of magnetic blowing of the electric arc, guaranteeing a maximized magnetic excitation in the cut-off zone to promote the elongation of the electric arc, combined or no to splitting the electric arc, for the fastest possible extinction of the electric arc, making it possible to significantly improve the breaking performance for the same quality of magnets.
- this solution is compatible and / or adaptable to any type of switching device, both direct current and alternating current, and can advantageously replace conventional extinguishing chambers.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Arc Welding Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2001629A FR3107395B1 (fr) | 2020-02-19 | 2020-02-19 | Chambre de coupure à soufflage magnétique pour un appareil de coupure électrique et appareil de coupure électrique équipé d’une telle chambre |
PCT/EP2021/052772 WO2021165055A1 (fr) | 2020-02-19 | 2021-02-05 | Chambre de coupure a soufflage magnetique pour un appareil de coupure electrique et appareil de coupure electrique equipe d'une telle chambre |
Publications (3)
Publication Number | Publication Date |
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EP4107768A1 true EP4107768A1 (fr) | 2022-12-28 |
EP4107768C0 EP4107768C0 (fr) | 2023-06-07 |
EP4107768B1 EP4107768B1 (fr) | 2023-06-07 |
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EP21707166.1A Active EP4107768B1 (fr) | 2020-02-19 | 2021-02-05 | Chambre de coupure à soufflage magnétique pour un appareil de coupure électrique et appareil de coupure électrique équipé d'une telle chambre |
Country Status (6)
Country | Link |
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US (1) | US11664175B2 (fr) |
EP (1) | EP4107768B1 (fr) |
CN (1) | CN114946002B (fr) |
ES (1) | ES2946971T3 (fr) |
FR (1) | FR3107395B1 (fr) |
WO (1) | WO2021165055A1 (fr) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1264164B1 (it) * | 1993-04-21 | 1996-09-17 | Sace Spa | Interruttore di bassa tensione in scatola isolante |
US6667863B1 (en) * | 1998-12-22 | 2003-12-23 | Rockwell Automation Technologies, Inc. | Method and apparatus for interrupting current through deionization of arc plasma |
DE60019912T2 (de) * | 1999-10-14 | 2006-01-12 | Matsushita Electric Works, Ltd., Kadoma | Kontaktvorrichtung |
UA57881C2 (uk) * | 2001-12-29 | 2003-07-15 | Микола Сергійович Бабич | Спосіб керування магнітним потоком електромагніта і електромагніт(варіанти), що реалізує спосіб. |
DE102007025537A1 (de) * | 2007-05-31 | 2008-12-04 | Abb Ag | Elektrisches Installationsschaltgerät mit einer Lichtbogenblaseinrichtung |
JP5682450B2 (ja) * | 2011-05-23 | 2015-03-11 | 富士電機機器制御株式会社 | 回路遮断器 |
FR3003101B1 (fr) | 2013-03-07 | 2015-04-10 | Leroy Somer Moteurs | Machine electronique tournante. |
US9343251B2 (en) * | 2013-10-30 | 2016-05-17 | Eaton Corporation | Bi-directional direct current electrical switching apparatus including small permanent magnets on ferromagnetic side members and one set of arc splitter plates |
WO2015178013A1 (fr) * | 2014-05-20 | 2015-11-26 | パナソニックIpマネジメント株式会社 | Dispositif de contact |
CN204558301U (zh) * | 2015-04-15 | 2015-08-12 | 浙江天正电气股份有限公司 | 一种具有磁吹式和气吹式灭弧结构的灭弧系统 |
US9704676B1 (en) * | 2016-03-15 | 2017-07-11 | Siemens Aktiengesellschaft | Slot motor assembly and arc plate assembly combination |
US9679720B1 (en) | 2016-05-06 | 2017-06-13 | Carling Technologies, Inc. | Arc motivation device |
US10211003B1 (en) * | 2017-11-22 | 2019-02-19 | Carling Technologies, Inc. | Single pole DC circuit breaker with bi-directional arc chamber |
CN209675160U (zh) * | 2019-04-12 | 2019-11-22 | 贵州振华群英电器有限公司(国营第八九一厂) | 一种磁吹灭弧装置 |
US10957504B1 (en) * | 2019-12-30 | 2021-03-23 | Schneider Electric USA, Inc. | Arc chute for circuit protective devices |
-
2020
- 2020-02-19 FR FR2001629A patent/FR3107395B1/fr active Active
-
2021
- 2021-02-05 CN CN202180008991.6A patent/CN114946002B/zh active Active
- 2021-02-05 WO PCT/EP2021/052772 patent/WO2021165055A1/fr unknown
- 2021-02-05 ES ES21707166T patent/ES2946971T3/es active Active
- 2021-02-05 EP EP21707166.1A patent/EP4107768B1/fr active Active
- 2021-02-05 US US17/779,875 patent/US11664175B2/en active Active
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Publication number | Publication date |
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ES2946971T3 (es) | 2023-07-28 |
US20220415590A1 (en) | 2022-12-29 |
CN114946002A (zh) | 2022-08-26 |
EP4107768C0 (fr) | 2023-06-07 |
US11664175B2 (en) | 2023-05-30 |
WO2021165055A1 (fr) | 2021-08-26 |
EP4107768B1 (fr) | 2023-06-07 |
FR3107395A1 (fr) | 2021-08-20 |
CN114946002B (zh) | 2023-04-18 |
FR3107395B1 (fr) | 2022-12-30 |
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