• 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:
    The invention relates to a contact pin for high-voltage circuit breaker with a jacket produced by extrusion (1) made of copper, which has a front end (2), a rear end (3) and at both ends an opening (9, 13) whose lights Cross-section at the front end (2) is smaller than at the rear end (3) of the shell (1). The wall thickness of the jacket (1) is greater in a section (6) of the jacket (1) located at the front end (2) of the jacket (1) without enlarging the outer dimensions of the jacket (1) than in a central section (7). of the coat (1). At the front end of the shell (1) a contact piece (4) is fastened, which consists of a material which is more resistant to the action of arcs, which occur when switching the high-voltage circuit breaker, than copper. Furthermore, the invention relates to a method for producing such a contact pin and a high-voltage circuit breaker.
    公开号:CH708235B1
    申请号:CH00946/14
    申请日:2014-06-20
    公开日:2018-05-15
    发明作者:Moog Dirk；Kretz Willy
    申请人:Doduco Contacts And Refining Gmbh；
    IPC主号:
    专利说明:

    Description It is known to use in electrical high-voltage circuit breakers electrical contact assemblies consisting of a tubular contact piece and a contact pin which makes contact with one end of the tubular contact piece when the switch is closed. In a high-voltage circuit breaker, it is important that the switching operations are carried out quickly so that an arc that arises between the tubular contact piece and the contact pin as soon as possible breaks when opening the switch and when closing the switch as soon as possible by the impact of the contact pin the opposite contact piece is deleted.
    It is known to produce the contact pin from a pin made of copper and to provide this with a contact tip of a copper-tungsten composite material to keep the occurring under arc burning of the contact tip low.
    The speed at which a high-voltage circuit breaker can be opened and closed is limited on the one hand by the inertial mass of the pin to be accelerated and on the other by the boundary condition that the high-voltage circuit breaker should switch bounce-free. The larger the inertial mass of the contact pin to be accelerated, the more complex the drive for the contact pin.
    In order to achieve short switching times, it is known to reduce the mass of the contact pin by forming the copper pin hollow. Because copper is a relatively soft metal, the mass of the copper pin can not be reduced as much by a hollow design, as you would like, because the contact pin would not otherwise withstand the mechanical stresses that occur during the switching process.
    To remedy this disadvantage, it is known to produce a hollow copper pin made of a hardened copper alloy. However, this is a major disadvantage. Even small amounts of hardening alloy constituents in the copper lead namely to a drastic reduction of the electrical conductivity compared to the electrical conductivity of pure copper. Therefore, when using a hardened copper alloy, the cross section of the contact pin must be increased to achieve the same current carrying capacity as a contact pin made of pure copper.
    Furthermore, it is known to use as a carrier for the contact tip instead of a pin made of copper, a hollow contact pin made of steel. However, in this case too, there is the disadvantage that the electrical conductivity of steel is much smaller than that of copper.
    The present invention has for its object to provide a way in which high-voltage circuit breakers in the simplest and most cost-effective manner, the cost of manufacturing and driving the movable contact pin can be reduced.
    According to the invention, this object is achieved by a contact pin having the features specified in claim 1. A method for producing a contact pin according to the invention is the subject of claim 14. A high-voltage circuit breaker according to the invention is the subject of claim 19. Advantageous developments of the invention are the subject of the dependent claims.
    The contact pin for high-voltage circuit breaker has a jacket made of integrally molded by forward extrusion of copper, which has a front end, a rear end and at both ends an opening whose light cross-section at the front end is smaller than at the rear end of the Mantels, wherein in a located at the front end of the shell portion of the shell, the wall thickness of the shell without increasing the outer dimensions (diameter) of the shell is greater than in a central portion of the shell. Attached to the front end of the shell is a contact piece made of a material that is more resistant to the effects of arcing occurring when a high voltage circuit breaker is switched than copper.
    This has significant advantages: - Due to the lower mass of the movable contact pin, the performance of the drive required for him can be reduced. This is a reduction of the effort goes hand in hand, which must be driven for the realization of the drive. - Due to the fact that the jacket has a greater wall thickness at its front end than in its subsequent central main section, it offers the contact piece to be fastened thereto a sufficiently large surface for connection to the contact piece, in particular by brazing or welding. - The local increase in mass by increasing the wall thickness at the front end of the shell can be partially offset by the fact that the copper pin has an opening at its front end. - The provision of an opening at the front end of the shell facilitates its manufacture and allows a rational and cost-effective production by forward extrusion and which subsequently leads to a product of high dimensional accuracy. - The inventive pin allows a simple and inexpensive way to shorten the duration of the switching operation of high-voltage circuit breakers. - Preferably, the jacket has at its end facing away from the contact piece a section with a larger transmission diameter than on its remaining length. At this rear portion, a connection device for an electrical supply line can be formed. As a result, it can easily be achieved that the required electrical supply line ends directly at the rear portion of the jacket made of copper, so that a low electrical contact resistance is ensured. The rear portion of the copper jacket with its larger Aus-diameters readily results in forward-extrusion, if this is not done over the full length of the shell, but is terminated before forming by forward extrusion reaches the rear end of the copper jacket, so that no separate operation is required for this.
    An inventive pin can be made particularly simple and inexpensive by the method according to claim 14. For this purpose, the wall thickness of a cylindrical copper tube is reduced over a majority of its length by forward extrusion and then a contact piece of a material which is more resistant to the harmful effect of switching arcs than copper, e.g. by welding or brazing to the front end surface of the formed by the extrusion of copper pipe. At the rear end of the copper tube facing away from the contact piece, a connection device for an electrical supply line can be formed or attached after or before the attachment of the contact piece.
    The method also has significant advantages: - By the forward-extrusion results in the production of the shell no copper waste, resulting in the light of the high and further rising price of copper, a cost advantage. - The production of the copper jacket by forward-extrusion is fast and efficient. - Due to the interaction of the die used for the extrusion molding with the mandrel, which supports the peripheral wall of the shell during extrusion from the inside, there is readily a copper jacket with high dimensional accuracy. - The interaction of the die used for the forward extrusion with the axially displaceable mandrel gives the possibility to produce during forward extrusion in the same operation, an inner surface of the shell whose inside width over the length of the shell is not constant, but targeted in a front portion of the shell has a smaller clearer width than in the central main portion of the shell, resulting in the front end a larger end surface for the attachment of a contact piece, in particular by welding or brazing results. - The fact that the copper pipe is not formed over the full length, but preferably only over a majority of its length by the forward extrusion, a section remains at the rear end of the copper tube with its original diameter and with its original wall thickness, which readily is sufficient, for. B. a female thread into it, with the help of an electrical connection can be realized. From the outer circumference of the thick-walled rear portion of the copper sheath, a portion of the copper may be milled to form two planar, mutually parallel surfaces which provide a wrench attack capability. - By the forward extrusion presses the jacket of the contact pin receives a substantially laminar structure, which ensures even at higher current densities and when heating the shell that no thermal stresses occur, which lead to a bending of the contact pin. - For the production of the contact pin can be assumed that a standard available tubular copper semi-finished product.
    As far as the contact piece is soldered at the front end of the shell with the interposition of a braze or welded with the interposition of a welding filler, this can be arranged in the form of a flat ring before soldering or welding between the contact piece and the front end surface of the shell. If you want to avoid that some of the brazing filler metal or the welding additive during soldering or welding process flows into the opening in the front end surface of the copper sheath, you can subsequently close this opening by a suitable stopper. The plug does not necessarily have to participate in the soldering or welding process and can therefore be used e.g. also made of a ceramic such as Alumina or magnesium oxide so that it does not significantly increase the mass of the contact pin. The plug could also consist of a metal. If it consists of a light metal such as aluminum, it only slightly increases the weight of the contact pin. The plug can also consist of copper. This would have the advantage that one and the same good-conducting copper is present on both sides of the connection zone, which facilitates the welding or soldering process and is favorable for a low electrical contact resistance.
    Another advantage of a plug is that a brazing alloy or a welding filler material may not be provided in the form of a flat ring, but may also be provided in the form of a pellet or plate, which is centrally between the plug and the to be welded or to be soldered contact piece is clamped and then can distribute evenly under pressure and heat generation over the entire connection surface.
    As a welding method, in particular, the percussion welding method, which is a capacitor-in-pulsschweissverfahren, in which the required welding energy is supplied by a short-term electronic capacitor discharge. Another way to bond the contact piece and the copper shell together is a friction welding method in which the parts to be joined together by welding them relative to each other while being pressed against each other, thereby welding them together under frictional heat generation. In any case, this procedure can be done without a stopper.
    In order to use a plug in the provided at the front end of the shell opening, this opening is in the direction of the contact piece, for. flared and is closed by a suitably shaped conical plug, which does not have to be firmly connected to the copper sheath before the welding or soldering process, since it is in any case interrupted by the e.g. conical training between the shell and the contact piece is captively clamped.
    Preferably, the inside width of the shell, starting from the front end of the shell in the direction of the rear end of the shell over a smaller part of the length of the shell increases and then remains the same over the greater part of the length of the shell. This ensures a sufficiently large end surface of the jacket to which the contact piece is to be attached. Only if the opening provided at the front end of the jacket is subsequently to be closed again by a stopper after the forward extrusion, is the inside width of the jacket modified in a section located at its front end in such a way that the clearance Width first tapered from the end face towards the rear end of the shell, then enlarged in a subsequent area on a portion of the length of the shell and then remains the same over most of the length of the shell. The section over which the inside width of the mantle remains the same should extend over more than half its length.
    As far as the outside of the shell, it should have the same except for a located at its rear end portion constant outside dimensions, in particular cylindrical and only at the rear end of the shell, it is advisable to provide a section with larger external dimensions to comfortable there to be able to realize an electrical connection. Incidentally, the wall thickness of the shell can be adjusted with e.g. 1 mm to 2 mm be relatively thin.
    Preferably, the jacket of the contact pin is empty in order to keep its mass inertia low. If special stresses are to be expected, however, it is possible to provide a solid core in the jacket, which supports the jacket from the inside. This core, when solid, should have a lower density than copper, in particular a density which is less than 3 g / cm3. Particularly suitable materials for the core are light metals such as aluminum and magnesium, light metal alloys, also metal oxides, in particular aluminum oxide or magnesium oxide, furthermore ceramics, in particular foamed ceramics and - if the operating temperature allows it - plastic. But it is also possible, the copper jacket by inserting a tube, e.g. steel support. Although steel does not have a density smaller than 3 g / cm3, however, since it can be used as a pipe, its average density including the remaining air space can also be kept below 3 g / cm3.
    The solid core, which fills the jacket starting from the end wall, gives the contact pin a strength which is similar to the strength of a corresponding contact pin, which, apart from the contact tip, consists of solid copper. Due to the lower density of the core, however, the mass of the contact pin, compared to a corresponding contact pin, which, apart from the contact tip, consists of pure copper, significantly reduced.
    If the copper jacket is supported from the inside by a core, it may have a particularly small wall thickness, which is limited only by the required current carrying capacity. The required for a particular high-voltage circuit breaker mechanical strength of the contact pin is not critical to the design of the wall thickness of his existing copper shell.
    If a core is provided in the copper sheath in an individual case - this may e.g. preferably pressed into the mantle, then it preferably does not extend to the rear end of the mantle. This has the advantage that in the interior of the rear portion of the shell there is still a free space that can be used for the formation of an electrical connection device.
    As materials for the contact piece in particular composite materials such as copper-tungsten, silver-tungsten, silver-tungsten-carbide and silver-molybdenum come into question, with copper-tungsten is preferred.
    Preferred embodiments for the preparation of a contact pin according to the invention are shown in the accompanying drawings.
    1 shows a longitudinal section through a first embodiment of a contact pin,
    2 shows a longitudinal section through a second embodiment of a contact pin,
    3 shows a longitudinal section through a third embodiment of a contact pin,
    Fig. 4 shows in the representations 4A to 4D a process of the forward extrusion of a copper pipe for the manufacture of a copper sheath according to the invention at four different times of the flow molding process, and
    Fig. 5 shows a longitudinal sectional view of a copper jacket thus produced.
    Fig. 1 shows a copper jacket 1 with a front end 2 and a rear end 3 and with a front end 2 attached contact piece 4 of a material which is more resistant to the action of arcs than copper.
    Viewed from the outside of the contact pin with the exception of a rounded edge at the top of the contact piece 4 and with the exception of a section 5 at the rear end of the copper jacket 1, which has a larger off-diameter than the casing 1, moreover, cylindrical. The section 5 at the rear end 3 of the copper sheath 1 is therefore provided with a larger outer diameter, in order to have here sufficient material for the formation of an electrical connection, e.g. to cut an internal thread or an external thread in the section 5, which can serve to connect an electrical supply line. A portion 6, which lies at the front end 2 of the copper jacket 1, shows a reduced inner diameter. In the central portion 7 of the copper sheath 1, the main portion which extends from the rear portion 5 to the front portion 6 over most of the length of the copper sheath 1, there is a constant inner diameter. The same inner diameter is also present in the rear section 5. In the front portion 6 of the copper jacket 1, the inner diameter in the connection zone 8 between the copper jacket 1 and the contact piece 4 is substantially smaller than in the middle section 7. Starting from the connection zone 8 between the front end 2 of the copper jacket 1 and the contact piece 4 tapers Interior of the copper sheath 1, starting at the opening 9, first on a part 24 (see FIG. 4D) of the length of the section 6 and then widens in a section 23 (see FIG. 4D) to the diameter of the central section 7. In this way, a mechanically very stable connection between the copper jacket 1 and the contact piece 4 can be achieved. At the transition from the tapered portion 24 of the inner space to the widening portion 23 of the interior of the copper sheath 1, the interior has a waist 11 in this way.
    The embodiment shown in FIG. 2 differs from the embodiment shown in FIG. 1 in that - starting from the connection zone 8 - extending in the direction of the rear end 3, tapered portion 24 of the interior of the copper jacket. 1 a plug 10 is inserted appropriately. If, when welding the contact piece 4 to the copper jacket 1 by welding or brazing, a welding filler material or a brazing filler metal is used, the stopper 10 prevents loss of the brazing filler metal or of the welding filler material into the interior of the copper jacket 1.
    The embodiment shown in Fig. 3 differs from the embodiment shown in Fig. 2 in that in the central portion 7 of the copper sheath 1, a cylindrical core 12 is inserted, which ends in the waist 11 on the plug 10 and-if necessary-increases the mechanical stability of the contact pin or a thinner copper sheath 1 allows. The density of the core 12 should be much smaller than the density of the copper. If aluminum or magnesium or a light metal alloy of aluminum and / or magnesium is used for the core 12, the core 12 can also contribute to the current carrying capacity of the contact pin. If there is no need to increase the current carrying capacity of the contact pin, the core 12 may also consist of a non-conductive material, for. B. from a foam ceramic.
    A copper sheath 1, as shown in FIGS. 1 to 3, can be produced by a forward flow molding method shown schematically in FIGS. 4A to 4D, in particular by cold extrusion. For this purpose, one starts from a preferably cylindrical copper tube 14, which is inserted into a die 15, which has a portion 16 with a larger diameter, which corresponds to the outer diameter of the copper tube 14, and has a portion 17 with a comparatively smaller diameter, between them a transition region 18 is formed. The diameter of the portion 17 determines the outer diameter to which the copper tube 14 is deformed by forward extrusion. The transition region 18 is formed approximately conically with a steady course. A punch 19 presses the rear end of the copper tube 14 to press it forward through the die 15. A cylindrical mandrel 20, which is slidable in the forward pressing direction 21 and in the opposite direction, supports the peripheral wall of the copper pipe 14 from the inside during the forward extrusion. The mandrel 20 has a tapered tip 22 which is rotationally symmetric to the longitudinal axis of the mandrel 21 and the copper tube 14 and may be conical, but need not be conical. The location of the tapered tip 22 relative to the transition region 18 of the die 15 determines the size of the ring cross-section through which the copper of the copper tube 14 must flow during forward extrusion.
    Fig. 4A shows the state before the start of the flow-molding process. The flow-molding process begins with both the copper tube 14 and the mandrel 20 being advanced synchronously. In this case, the annular gap between the tip 22 of the mandrel 20 and the transition region 18 of the die 15 narrows steadily. From the time at which the width of the annular gap is smaller than the wall thickness of the original copper tube 14 - see Fig. 4B - begins to reduce the wall thickness of the copper jacket 1 by the Fliesspress process until the annular gap between the tip 22 of the dome 20th and the transition region 18 of the die 15 reaches its smallest width. This condition is shown in Fig. 4C. From then until reaching the rear end portion 5 of the copper jacket 1, the wall thickness of the formed by the extrusion copper jacket 1 remains the same, see Fig. 4D.
    How long the transition region 23 between the narrowest point of the interior of the copper jacket 1 - at the waist 11 - and the largest width of the interior of the copper jacket 1 depends on the relative speed of
    Doms 20 relative to the punch 19 from. The slower the mandrel 20 moves relative to the punch 19, the longer is the transition region 23 widening in the direction of the rear end 3 of the copper jacket 1 in the copper jacket 1.
    The extending from the connection zone 8 to the narrowest point of the waist 11 portion 24 of the interior can be achieved by the fact that the flow of copper along the wall of the die 13 is inhibited somewhat more than along the dome 18, whereby the outer edge of the front end of the copper jacket 1 with respect to the inner edge remains slightly behind. The resulting shape of the portion 24 of the interior from the narrowest point of the waist 11 to the connection zone 8 can be advantageously closed by a plug 10 and is exaggerated in Figs. 4C and 4D, only to show the principle.
    At the latest when the punch 19 reaches the transition zone 18 of the die 15, the forward flow molding process is completed, the mandrel 20 is withdrawn when the die 19 is stationary, then the punch 19 is withdrawn and the copper shell 1 pulled out of the die 13 , The copper jacket 1 produced in this way is shown in FIG. 5. The representation is to be understood as a principle, not as a scale representation.
    Subsequently, a contact piece 4 is welded or soldered to the front end 2 of the copper sheath 1.
    REFERENCE SIGNS LIST 1 copper sheath 2 front end of the copper sheath 3 rear end of the copper sheath 4 contact piece 5 rear portion of the copper sheath 6 front portion of the copper sheath 7 middle section of the copper sheath 8 connecting zone 9 front opening 10 plug 11 waist in the front section 6 12 core 13 rear Opening 14 Copper pipe 15 Die 16 Larger diameter portion of the die 17 Smaller diameter portion of the die 18 Transitional portion of the die 19 Stamp 20 Mandrel 21 Pressing direction 22 Tip of the dome 23 Transition area of the copper mantle from the narrowest point of the waist 11 to the beginning of the section constant internal diameter 24 Section of the copper jacket from the front end 2 to the narrowest point of the waist 11
    权利要求:
    Claims (19)
    [1]
    25 section of the mandrel 20 with constant diameter claims
    A contact pin for high-voltage circuit breaker, comprising a copper-made jacket (1) produced by extrusion, which has a front end (2), a rear end (3) and an opening (9, 13) at both ends, the light-tight Cross section of the opening (9) at the front end (2) is smaller than the clear cross section of the opening (13) at the rear end (3) of the jacket (1), wherein the wall thickness of the jacket (1) in a at the front end (2 ) of the shell (1) located portion (6) of the jacket (1) without increasing the outer dimensions of the shell (1) is greater than in a central portion (7) of the jacket (1), and with a at the front end (2 ) of the shell (1) fixed contact piece (4), which consists of a material which is more resistant to the action of arcs, which occur when switching the high-voltage circuit breaker, as copper.
    [2]
    2. Contact pin according to claim 1, characterized in that the opening (9) at the front end (2) of the jacket (1) by a plug (10) is closed.
    [3]
    3. Contact pin according to claim 2, characterized in that the interior of the jacket (1), starting from the at the front end (2) of the jacket (1) provided opening (9) in the direction of the contact piece (4) expands and through the to suitably designed plug (10) is closed.
    [4]
    4. Contact pin according to claim 1 or 2, characterized in that the clear cross-section of the jacket (1) starting from the front end (2) of the jacket (1) towards the rear end (3) of the jacket (1) over a part the length of the shell (1) is increased and then remains the same.
    [5]
    5. Contact pin according to one of claims 1 to 3, characterized in that the clear cross section of the jacket (1) starting from the front end (2) of the jacket (1) towards the rear end (3) of the jacket (1) initially tapered conically, enlarged in a subsequent section (23) on a part of the length of the shell (1) and then remains the same.
    [6]
    6. Contact pin according to claim 4 or 5, characterized in that the clear cross section of the jacket (1) remains the same over more than half its length.
    [7]
    7. Contact pin according to one of the preceding claims, characterized in that the jacket (1) with the exception of one at its rear end (3) located portion (5) over its length has constant outer dimensions, in particular cylindrical, whereas the at the rear end ( 3) located portion (5) on the other hand has larger outer dimensions.
    [8]
    8. Contact pin according to one of the preceding claims, characterized in that its copper jacket (1) is empty.
    [9]
    9. Contact pin according to one of claims 1 to 7, characterized in that in the jacket (1) a solid core (12) is provided, which has a lower density than copper, which is preferably less than 3g / cm3.
    [10]
    10. Contact pin according to claim 9, characterized in that the material of the core (12) is selected from the following group: light metals; Light alloys; Metal oxides, in particular aluminum oxide or magnesium oxide; Ceramics, including foamed ceramics; Plastics.
    [11]
    11. Contact pin according to one of the preceding claims, characterized in that the contact piece (4) is formed from a composite material which is selected from the group of the materials copper-tungsten, silver-tungsten, silver-tungsten-carbide and silver-molybdenum, wherein copper-tungsten is preferred.
    [12]
    12. Contact pin according to claim 9 or 10, characterized in that the contact piece (4) facing away from the rear portion (5) of the jacket (1) over the core (12).
    [13]
    13. Contact pin according to one of the preceding claims, characterized in that the wall thickness of the central portion (7) of the jacket (1) is 1 mm to 2 mm.
    [14]
    14. A method for producing a contact pin according to one of claims 1 to 13 by forward-extrusion of a tube (14) made of copper by a in the pressing direction in cross-section narrowing die (15), wherein the peripheral wall of the tube (14) from the inside by a coaxially arranged mandrel (20) is supported, which has a portion (25) whose diameter is smaller than the smallest inner diameter of the die (15) and the subsequent thereto in the pressing direction (21) tapered portion (22), wherein the Mandrel (20) in the die (15) is longitudinally displaceable and for generating an over the length of the shell (1) changing inside diameter of the shell (1) during the extrusion in the die (15) is moved longitudinally, attaching the contact piece ( 4) at the front end (2) of the jacket (1).
    [15]
    15. The method according to claim 14, characterized in that prior to attaching the contact piece (4) a plug (10) in the front end (2) of the jacket (1) is introduced.
    [16]
    16. The method according to claim 14 or 15 for producing a contact pin according to claim 9 or 10, characterized in that a solid core (12) in the jacket (1) is inserted, whose cross section is closely adapted to the clear cross section of the jacket (1) ,
    [17]
    17. The method according to claim 14 or 15, characterized in that the forward-extrusion is carried out at room temperature.
    [18]
    18. The method according to any one of claims 14 to 17, characterized in that the clear cross section of the die (15), the mandrel (20) and the copper tube (14) are rotationally symmetrical with respect to the film extrusion direction (21), in particular circular cylindrical.
    [19]
    19. A high voltage circuit breaker with a contact assembly comprising a tubular contact piece and a movable contact pin, and a drive which can bring the contact pin in contact with the tubular contact piece to close the circuit breaker and separate the contact pin for opening the circuit breaker from the tubular contact piece can, characterized in that the contact pin is designed according to one of claims 1 to 13.
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    同族专利:
    公开号 | 公开日
    DE102013106727A1|2014-12-31|
    CH708235B9|2018-08-15|
    DE102013106727B4|2015-08-06|
    CN104252991B|2018-09-28|
    CN104252991A|2014-12-31|
    CH708235A2|2014-12-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19816507A1|1998-04-14|1999-10-21|Asea Brown Boveri|Burn-up switching arrangement|
    DE19816509B4|1998-04-14|2006-08-10|Abb Schweiz Ag|consumable|
    DE102008060971B3|2008-12-06|2010-07-08|Ami Doduco Gmbh|Contact part for high voltage switch|
    DE102012101222A1|2011-12-21|2013-06-27|Alutec Metal Innovations Gmbh & Co. Kg|Contact pin for high-voltage circuit breaker and high-voltage circuit breaker with such a contact pin|
    法律状态:
    2017-12-29| PFA| Name/firm changed|Owner name: DODUCO CONTACTS AND REFINING GMBH, DE Free format text: FORMER OWNER: DODUCO GMBH, DE |
    2018-08-15| PK| Correction|Free format text: BERICHTIGUNG PATENTSCHRIFT |
    2022-01-31| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013106727.1A|DE102013106727B4|2013-06-26|2013-06-26|Contact pin for high-voltage circuit breaker, method for its manufacture and high-voltage circuit breaker with such a contact pin|
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