• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This DC circuit breaker (1) has first (21; 21 ') and second (3) movable electrical contacts. The circuit breaker (1) further comprises a magnetic circuit (5) including a magnet (50, 50 ') and generating a magnetic field capable of guiding, in the direction of a breaking chamber (4), an electric arc and presenting this effect of curved field lines extending perpendicular to opposite side walls (31, 32) of an arc-forming chamber, these field lines converging at a central region of the formation chamber of arc containing the contact areas, to the breaking chamber (4) extending parallel to the longitudinal plane (P1).
    公开号:FR3050311A1
    申请号:FR1653346
    申请日:2016-04-15
    公开日:2017-10-20
    发明作者:Eric Domejean；Loic Rondot；Stephane Dye
    申请人:Schneider Electric Industries SAS；
    IPC主号:
    专利说明:

    The invention relates to an electric breaker circuit breaker with air cutoff having an improved arc breaking power.
    DC and air-interruptions electrical circuit breakers are known, which comprise electrical contacts, connected to input and output terminals of the electric current and being selectively movable relative to each other between a closed position, in which respective contact areas of the first and second electrical contacts are in contact with each other to allow the flow of direct electric current between the first and second electrical contacts, and an open position, in which these contact areas are distant from each other.
    In a known manner, these circuit breakers make it possible to protect electrical systems against abnormal conditions, such as an electrical overcurrent or a short circuit, by rapidly interrupting the flow of electric current when such an abnormal condition is detected. By "fast" is meant that the electric current must be interrupted in less than 100ms or, preferably, less than 10ms after detection of the abnormal condition.
    To interrupt the flow of current, the conductors are moved away from each other to their open position. Typically, an electric arc is formed between their contact zones. This arc must be off in order to interrupt the flow of electric current. In practice, for electric currents of high intensity, for example greater than about ten amperes, the electric arc is blown in the direction of an arc-breaking chamber, where it is extinguished, thus allowing interrupt the flow of the current. Such a blowing effect is partly caused by an electromagnetic force exerted on the electric arc, under the effect of the magnetic field created by the flow of electric current in the electric arc itself. However, in the presence of an electric current of less intensity, for example less than or equal to ten amperes or an ampere, the magnetic field generated by the electric arc itself is not sufficient to move it by blowing towards the breaking chamber. The electric arc can thus persist long between the two electrical contact zones. This is not desirable because the circuit breaker does not quickly interrupt the flow of current, which can cause a situation that is unsafe.
    From FR 2 632 772 B1 there is known a circuit breaker in which a permanent magnet is disposed on an arc horn at the inlet of the interrupting chamber, so as to generate a constant magnetic field for moving an electric arc towards the breaking chamber. whatever the value of the electric current. Such a device, however, does not give complete satisfaction and more is complicated to produce industrially and requires sometimes significant modifications of existing circuit breakers for its integration. It is these drawbacks that the invention intends to remedy more particularly by proposing a reversible electric circuit breaker with reversible polarity and in which an electric arc can be reliably interrupted even for low values of electric current intensity. and can be made industrially in a simple manner. To this end, the invention relates to a DC electric circuit breaker, comprising: first and second input and output terminals of a direct electric current, first and second electrical contacts, respectively connected to the first and second terminals and being selectively movable relative to each other, in a longitudinal plane of the circuit breaker, between: • a closed position, in which respective contact areas of the first and second electrical contacts are in contact with each other; other for allowing the flow of direct electric current between the first and second electrical contacts, and • an open position, in which these contact areas are spaced from each other, - an arc-forming chamber in which the contact areas are placed; - a breaking chamber of an electric arc.
    The circuit breaker further comprises a magnetic circuit including a magnet and generating a magnetic field which is able to guide, in the direction of the breaking chamber, an electric arc formed between the contact zones in the open position, the magnetic field generated by the magnetic circuit having for this purpose curved field lines which extend substantially perpendicular to opposite side walls of the arc-forming chamber, these side walls being arranged on both sides of the contact zones substantially parallel in the longitudinal plane, these field lines converging, at a central region of the arc-forming chamber containing the contact zones, towards the breaking chamber extending parallel to the longitudinal plane.
    Thanks to the invention, the magnetic field created by the magnet and the magnetic circuit exerts a force on the electric arc which first moves the latter away from the electrical contact areas and perpendicularly to the longitudinal plane. Due to the configuration of the magnetic field lines, the force exerted on the electric arc then changes direction, so as to then direct the electric arc to the breaking chamber. Because of the symmetrical configuration with respect to the longitudinal plane, the electric arc is moved to the interrupting chamber irrespective of the direction of flow of the electric current in the circuit breaker. In addition, the magnetic circuit is easily integrated with existing circuit breakers, without imposing significant structural changes.
    According to advantageous but non-mandatory aspects of the invention, such a circuit breaker may incorporate one or more of the following characteristics, taken in any technically permissible combination: the magnetic circuit further comprises a magnetic core made of ferromagnetic material and which extends at least in part along the first electrical contact, the magnet being placed at one end of the magnetic core. - The magnet has a magnetic axis oriented parallel to a longitudinal direction contained in the longitudinal plane. - The spacing between the magnet and the end of the magnetic core is less than or equal to 2 mm or preferably less than or equal to 1 mm, or even preferably zero. - The magnet is a permanent magnet. The magnet is made of a synthetic alloy containing a rare earth element, for example a Samarium-Cobalt alloy. - The magnet is capable of generating a magnetic field greater than or equal to 0.5 Tesla, or, preferably, greater than or equal to 1 Tesla. - The magnetic core is made of steel or iron. - The side walls are made of a ferromagnetic material. The invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows, of an embodiment of a circuit breaker given solely by way of example and made with reference to attached drawings in which: - Figure 1 is a schematic representation in a perspective view of an inner portion of a DC electric circuit breaker according to the invention; - Figure 2 is a schematic representation of a portion of the circuit breaker of Figure 1, according to the view illustrated by the arrow F2 of Figure 1; - Figures 3 and 4 show schematically magnetic field lines created by the magnetic circuit of the circuit breaker of Figure 1, in longitudinal sectional views in the plane P1 and transverse in the plane P2 of Figure 1; - Figure 5 is a schematic representation of a portion of the circuit breaker of Figure 1, according to the sectional plane P2 of Figure 1; FIGS. 6 and 7 diagrammatically show the direction of an electromagnetic force exerted on an electric arc for two opposite directions of circulation of the electric current in the circuit-breaker of FIG.
    Figure 1 shows a part of a circuit breaker 1 DC and cut in air. The circuit breaker 1 here comprises a closed housing, inside which are placed components of this circuit breaker 1. This housing is for example made of thermoformed plastic material. For the sake of clarity, the casing of the circuit breaker 1 is not shown in FIG.
    The circuit breaker 1 comprises electrical terminals 2 and 2 'of input and output of an electric current. The terminals 2 and 2 'are configured to electrically connect the circuit breaker 1 to an electrical circuit that is to be protected. The terminals 2 and 2 'are made of an electrically conductive material, for example a metal such as copper. These terminals 2 and 2 'are here accessible from outside the housing to connect the circuit breaker 1 to the circuit to be protected.
    In this example, the polarities of the circuit breaker 1 are reversible, that is to say that the terminals 2 and 2 'can alternately and indifferently serve as input or output terminals of the electric current in the circuit breaker 1.
    The circuit breaker 1 here comprises two subsets 1a and 1b each associated with a terminal 2, 2 '. The first subassembly 1a comprises the following elements: a first electrical contact 21 connected to the terminal 2, an arc-breaking chamber 4 and a magnetic circuit 5. The second subassembly 1b comprises the following elements: an electrical contact 21 'connected to the terminal 2', a chamber 4 'of arc cutting and a magnetic circuit 5'.
    Each of these two subsets 1a and 1b described operates in a similar manner. Also, only the first subset is described in detail in the following.
    In this example, the elements of the second subset 1b are identical and have a function similar to those of the first subset 1a. The elements of the second subassembly 1b bear the same reference numeral as those of the first subset 1a, plus the symbol "'". For example, the contact 21 'is analogous to the contact 21, and differs here only in its position in the circuit breaker 1.
    The circuit breaker 1 further comprises a mobile part 3, movable in rotation about a fixed axis X1 of the circuit breaker 1. For example, the mobile part 3 is pivotally mounted about an axis about a shaft integral with the circuit breaker housing 1. The mobile part 3 is here electrically conductive between contact zones 30 and 30 'opposite.
    We denote "P1" a longitudinal geometric plane of the circuit breaker 1. In this example, the plane P1 forms a plane of symmetry of the circuit breaker 1. Here, the elements of the circuit breaker 1 are further arranged symmetrically with respect to the axis X1 . The axis X1 is perpendicular to the plane P1. We denote "Z1" a geometric axis perpendicular to the axis X1 and contained in the plane P1 and which defines here a vertical direction.
    The electrical contact 21 is provided with a contact zone 22 intended to be brought into contact with the corresponding zone 30 of the part 3. For example, the contact zones 22 and 30 each comprise an electrically conductive contact pad, for example made of a metallic material, such as silver or copper.
    The electrical contact 21 is electrically connected to the terminal 2, while the mobile part 3 is electrically connected to the terminal 2 ', as explained in the following.
    Here, the contact 21 is fixed relative to the circuit breaker 1.
    In this example, the electrical contact 21 is in the form of a bar made of an electrically conductive material, for example copper, which extends parallel to a fixed axis Y1 of the circuit breaker. The axis Y1 here extends longitudinally with respect to the plane P1 and in a horizontal direction. In this illustrative example, the electrical contact 21 is formed in one piece with the terminal 2. More precisely, the bar comprises two superimposed straight portions, extending parallel to each other along the axis Y1 and connected to each other. between them by a portion 20 of this bar, this portion 20 being curved in the shape of a "U". The contact zone 22 is formed on one of the straight portions of the electrical contact 21. The portion of the terminal 2 intended to be connected to the outside is formed on the opposite straight portion of the electrical contact 21. More specifically, the contact zone 22 is formed on an upper part of the electrical contact 21 facing the corresponding contact zone 30 of the mobile part 3.
    The moving part 3 here plays the role of electrical contact vis-à-vis the electrical contact 21.
    The movable portion 3 and the electrical contact 21 are movable relative to each other, selectively and reversibly between closed and open positions. In the closed position, the contact zones 22 and 30 are in direct contact with one another to allow the flow of electric current between the mobile part 3 and the electrical contact 21. In the open position, the contact zones 22 and 30 are spaced from each other, which prevents the flow of electric current when no electric arc is present between the contacts 22 and 30. For example, in this open position, the contact zones 22 and are at least 5 mm apart, preferably at least 15 mm apart.
    The arrows F1 illustrate the direction of movement of the movable portion 3 from the closed position to the open position.
    In this example, the displacement of the movable portion 3 between the closed and open positions is carried out according to the plane P1, that is to say that the path of the contact zone 30 during the displacement is parallel to the plane P1. In the open position, the contact areas 21 and 30 are substantially aligned along an axis parallel to the axis Z1.
    Part 3 is here indirectly connected to the terminal 2 ', via, in particular, the electrical contact 21' of the second subassembly 1b.
    Similarly, open and closed positions of the movable part 3 are defined with respect to the electrical contact 21 '. The electrical contact 21 'here extends along a fixed axis Y1' parallel to the axis Y1.
    The circuit breaker 1 is arranged such that the part 3 is simultaneously in the open position or in the closed position, vis-à-vis the electrical contacts 21 and 21 '. Thus, by symmetry, the displacement to the open position is done simultaneously for each of these two subsets 1a and 1b. When the movable portion 3 is in the closed position, the electric current can flow between the terminals 2 and 2 'through the contact areas 21 and 21', the movable portion 3 and their respective contact areas. The displacement of the movable portion 3 to its open position is intended to prevent the circulation of this electric current between the terminals 2 and 2 '. When the mobile part 3 is in the open position, in the absence of an electric arc between the respective contact zones of the electrical contacts 21, 21 'and the mobile part 3, the electric current is prevented from circulating between the terminals 2 and 2 '.
    In known manner, when the movable portion 3 is moved to the open position while an electric current flows between the terminals 2 and 2 ', it can form an electric arc between the two contact zones 22 and 30. This electric arc allows the electric current to continue to flow and must be turned off to interrupt this electrical current.
    The circuit breaker 1 also comprises a trip circuit, not shown, configured to automatically move the movable portion 3 to the open position when a malfunction is detected, such as an overcurrent of the electric current flowing between the terminals 2 and 2 '.
    For example, the chamber 4 is at least partially defined by walls of the circuit breaker housing.
    In known manner, the breaking chamber 4 comprises a stack of arc cutting plates 41, electrically conductive and superimposed with each other. These plates are intended to extinguish the electric arc once this electric arc has penetrated inside the breaking chamber 4. In this example, these plates are identical to each other and have a flat shape, inscribed in a quadrilateral is in which is formed a substantially V-shaped incision on an edge facing areas 22 and 30. The stack of plates 41 is surmounted by an upper horn 43 arc disposed above a plate 42 end of the stack.
    In this example, the circuit breaker 1 comprises an arc forming chamber. This chamber is, for example, at least partly defined by internal walls of the casing of the circuit breaker 1. The contact areas 22 and 30 are located inside this arc forming chamber. The arc forming chamber is in communication with the breaking chamber 4 and opens into the interior of the latter. Both the arc forming chamber and the breaking chamber 4 are filled with air.
    We denote "P2" a geometrical plane perpendicular to the plane P1 and extending in the direction Z1. The plane P2 here forms a longitudinal sectional plane of the arc formation chamber. By way of example, the arc-forming chamber has a parallelepiped-shaped prism shape whose lateral faces parallel to the plane P1 are formed by the side walls 31, 32.
    In this example, the circuit breaker further comprises side walls 31 and 32, which delimit opposite faces of this arc forming chamber parallel to the plane P1. Here, the walls 31 and 32 have a substantially flat shape and parallel to the plane P1. The opposite walls 31 and 32 are arranged on either side of the contact zones 22 and 30 facing each other. For example, the walls 31 and 32 are made of a ferromagnetic material, such as steel or iron. By way of illustration, the walls 31 and 32 are each placed at a distance of between 10 mm and 100 mm from the contact zone 22, this distance being measured in a direction parallel to the axis X1.
    The magnetic circuit 5 is configured to generate a magnetic field capable of guiding, in the direction of the breaking chamber 4, an electric arc 6 formed between the contact zones 22 and 30 following the displacement, towards the open position, of the part 3. Due to the arrangement of the contact zones 22 and 30 in the open position, the electric arc 6 extends substantially along a direction parallel to the plane P1 and to the axis Z1.
    All that is described with reference to the magnetic circuit 5 also applies to the magnetic circuit 5 'vis-à-vis the corresponding elements of the subset 1b.
    FIG. 2 represents the arc formation chamber and the interrupting chamber, in a view from above according to the arrow F2 of FIG. 1. The reference 51 designates the magnetic field lines associated with the magnetic field created by the magnetic circuit. 5.
    We denote "R2" a central region of the arc-forming chamber, here delimited on both sides by geometric planes parallel to the plane P1 on either side of the contact 22 and extending along the axis Z1.
    The central region R2 includes the contact areas 22 and 30. It has a prism shape, whose lower base is formed by a part of the upper surface of the electrical contact 21, and extends in height substantially parallel to the direction. vertical Z1.
    "R1" and "R3" denote two lateral regions of the arc formation chamber which are arranged laterally on either side of the central region R2. Here, these lateral regions R1 and R3 are delimited laterally externally by the walls 31 and 32. The regions R1 and R3 do not contain the contact zones 22 and 30.
    The magnetic circuit 5 is shaped such that: - in the lateral regions R1 and R3, the field lines 51 extend substantially perpendicular to the side walls 31 and 32, and - in the central region R2, the field lines 51 extend essentially parallel to the plane P1 converging towards the breaking chamber 4. For example, in the central region, the magnetic flux is such that the magnetic field seen by the arc is greater than or equal to 20 microTeslas.
    Figures 3 and 4 show these lines of field 51 according to views in the planes P1 and P2 respectively.
    FIG. 5 shows the arc formation chamber and the cut-off chamber 4 in the cutting plane P2, according to the angle of view illustrated by the arrow F3 in FIG. 1. The mobile part 3 is illustrated in the open position .
    In this example, the field lines 51 of FIG. 2 are calculated by means of a finite element numerical simulation program, such as the software known under the trade name "Flux" and marketed by CEDRAT.
    The magnetic circuit 5 here comprises a permanent magnet 50 and a ferromagnetic core 23 whose function is to guide at least in part the magnetic field created by the magnet 50. The core 23 extends at least partly along the electrical contact 21, along the Y1 axis. The walls 31 and 32 are part of the magnetic circuit 5 and participate in guiding the magnetic flux created by the magnet 50 in particular to obtain the spatial arrangement of the field lines 51.
    In this example, the core 23 has a rectilinear bar shape that extends between the two straight portions of the electrical contact 21. This core 23 is made here in the form of a ferromagnetic metal sheet stack. Alternatively, the core 23 is formed by a single piece. The magnet 50 is here fixed, for example by gluing, on one end of this piece 23, here on the end located opposite the U-shaped portion 20. The magnet 50 is able to generate a field magnetic greater than or equal to 0.5 tesla or, preferably greater than or equal to 1 tesla and here has a magnetization magnetic axis M oriented parallel to the axis Y1.
    Preferably, the magnet 50 is a permanent magnet, for example made of a synthetic alloy containing an element of the rare earth family. Here, an alloy of Samarium-Cobalt is used. Advantageously, the magnet 50 is surrounded by a protective shell made of a non-magnetic material, such as plastic.
    Here, the spacing between the magnet 50 and the end of the core 23 on which it is placed is less than or equal to 2 mm or, preferably, less than or equal to 1 mm, or even more preferably zero. that is, equal to 0 mm. This spacing is here measured as being the distance between the adjacent edges of the magnet 50 and the end of the core 23. By reducing as far as possible the gap between the magnet 50 and this end of the core 23, the distance between the magnet 50 and the end of the core 23 is reduced. gap between the magnet 50 and the core 23, which ensures a better channelization of the magnetic flux generated by the magnet 50.
    FIG. 6 represents the directions of the magnetic field created by the magnetic circuit 5 according to a view in the plane P2 from the breaking chamber 4.
    Note: - "B1", "B2" and "B3" the magnetic induction vectors in the regions, respectively R1, R2 and R3 of the arc formation chamber; "J" the vector of electrical current density associated with the electric arc 6; - "E1", "E2" and "E3" the electromagnetic force exerted on the electric arc 6 under the action of the magnetic field created by the magnetic circuit 5, for each of these regions R1, R2 and R3.
    The vector J is here parallel to the direction Z1.
    The electromagnetic forces E1, E2 and E3 are Lorentz forces and are proportional to the vector product between the vector J and the magnetic induction, respectively, B1, B2 and B3 in the corresponding region R1, R2 or R3. In this example, because of the orientation of the field lines 51 and the direction of the current J, the forces E1 and E3 have directions parallel to the axis Y1 and are in opposite directions. The force E2 is directed parallel to the axis X1.
    Thus, when an electric arc 6 is formed between the contact zones 22 and 30, it undergoes a force E2 which directs it first to one of the lateral regions, in this case the lateral region R3. Due to the perpendicular orientation of the vector B3 with respect to the vector B2 and the direction of the vector J, the force E3 exerted on the electric arc 6, when it is located in the lateral region R3, is directed towards the inside the breaking chamber 4 and thus to the stack of cut plates 41. The electric arc 6 is moved to the chamber 4 by the force E3.
    FIG. 7 is similar to FIG. 6 and differs only in the direction of circulation of the electric current J in the electric arc 6, this direction being reversed with respect to that illustrated in FIG. 6. In this case, finds that the force E2 exerted on the electric arc 6, when in the region R2 between the contact zones 22 and 30, is such that the electric arc 6 is displaced towards the lateral region R1 opposite to the lateral region R3. However, because of the relative orientation of the vector B1 with respect to the vector B2 and because of the change of sign of the vector J with respect to the case of FIG. 6, the force E1 directs the electric arc 6 towards the breaking chamber 4.
    Thus, thanks to the magnetic circuit 5, in particular because of the spatial arrangement of the field lines 51, the electric arc 6 is moved towards the breaking chamber 4 whatever the direction of flow of the electric current and whatever its value. intensity. Even if the intensity of the electric arc current 6 is low, the electric arc 6 will be moved in a region where the electromagnetic force E1 or E3 is sufficient to move it to the breaking chamber 4. The operation of the circuit breaker 1 s is thus improved.
    The magnetic circuit 5 can be realized differently.
    Alternatively, the movable portion 3 is directly connected to the terminal 2 ', the second subset 1b is then omitted.
    The embodiments and alternatives contemplated above may be combined with one another to generate new embodiments.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    1current circuit breaker (1), comprising: - first (2) and second (2 ') input and output terminals of a continuous electric current, - first (21; 2T) and second (3) ) electrical contacts, respectively connected to the first and second terminals and being selectively movable relative to each other, in a longitudinal plane (P1) of the circuit breaker, between: • a closed position, in which contact zones (22 , 30) of the first and second electrical contacts are in contact with each other to allow the flow of the direct electric current between the first and second electrical contacts, and • an open position, in which these contact areas are distant one of the other, - an arc-forming chamber (6), in which the contact areas (22, 30) are placed; - a breaking chamber (4) of an electric arc (6); the circuit breaker (1) being characterized in that it further comprises a magnetic circuit (5) including a magnet (50, 50 ') and generating a magnetic field which is able to guide, in the direction of the breaking chamber (4 ), an electric arc (6) formed between the contact areas (22, 30) in the open position, the magnetic field generated by the magnetic circuit (5) having curved field lines (51) for this purpose which are extend substantially perpendicular to opposite side walls (31, 32) of the arc-forming chamber, said side walls being arranged on either side of the contact zones (22, 30) substantially parallel to the longitudinal plane ( P1), these field lines (51) converging, at a central region (R2) of the arc forming chamber containing the contact zones (22, 30), towards the breaking chamber (4) extending parallel to the longitudinal plane (P1).
    [2" id="c-fr-0002]
    2, - circuit breaker according to claim 1, characterized in that the magnetic circuit (5) further comprises a magnetic core (23, 23 ') made of ferromagnetic material and which extends at least partly along the first electrical contact (21), the magnet (50, 50 ') being placed at one end of the magnetic core (23, 23').
    [3" id="c-fr-0003]
    3. - Circuit breaker according to claim 2, characterized in that the magnet (50, 50 ') has a magnetic axis oriented parallel to a longitudinal direction (Y1) contained in the longitudinal plane (P1).
    [4" id="c-fr-0004]
    4. - Circuit breaker according to claim 3, characterized in that the spacing between the magnet (50, 50 ') and the end of the magnetic core (23, 23') is less than or equal to 2 mm or, preferably, less than or equal to 1 mm, or even preferably zero.
    [5" id="c-fr-0005]
    5. - Circuit breaker according to one of the preceding claims, characterized in that the magnet (50, 50 ') is a permanent magnet.
    [6" id="c-fr-0006]
    6. - Circuit breaker according to one of the preceding claims, characterized in that the magnet (50, 50 ') is made of a synthetic alloy containing a member of the rare earth family, for example a Samarium-Cobalt alloy.
    [7" id="c-fr-0007]
    7. - Circuit breaker according to one of the preceding claims, characterized in that the magnet (50, 50 ') is capable of generating a magnetic field greater than or equal to 0.5 Tesla, or, preferably, greater than or equal to 1 Tesla.
    [8" id="c-fr-0008]
    8. - Circuit breaker according to one of the preceding claims, characterized in that the magnetic core (23, 23 ') is made of steel or iron.
    [9" id="c-fr-0009]
    9. - Circuit breaker according to one of the preceding claims, characterized in that the side walls (31,32) are made of a ferromagnetic material.
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    同族专利:
    公开号 | 公开日
    ES2864005T3|2021-10-13|
    US20170301490A1|2017-10-19|
    EP3232457B1|2021-01-06|
    CN107301937A|2017-10-27|
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    US10176945B2|2019-01-08|
    EP3232457A1|2017-10-18|
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    CN104078257B|2013-03-27|2017-04-12|三菱电机株式会社|Switchgear|CN107808790B|2017-11-17|2019-12-20|河南森源电气股份有限公司|Moulded case circuit breaker magnet subassembly for contact structure|
    CN107799368B|2017-11-17|2020-01-10|河南森源电气股份有限公司|Contact structure of plastic case circuit breaker|
    FR3095890B1|2019-05-06|2021-07-16|Schneider Electric Ind Sas|Limiter pole for electric switch and DC electric switch comprising such a limiter pole|
    法律状态:
    2017-04-06| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-20| PLSC| Search report ready|Effective date: 20171020 |
    2018-04-18| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-04-27| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1653346A|FR3050311B1|2016-04-15|2016-04-15|DIRECT CURRENT ELECTRIC CIRCUIT BREAKER|FR1653346A| FR3050311B1|2016-04-15|2016-04-15|DIRECT CURRENT ELECTRIC CIRCUIT BREAKER|
    US15/471,237| US10176945B2|2016-04-15|2017-03-28|DC electrical circuit breaker|
    CN201710235614.1A| CN107301937A|2016-04-15|2017-04-12|D-c circuit breaker|
    ES17166705T| ES2864005T3|2016-04-15|2017-04-14|DC electrical circuit breaker|
    EP17166705.8A| EP3232457B1|2016-04-15|2017-04-14|Dc electrical circuit breaker|
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