• 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 coupling device for short-circuiting and grounding at least two phases in an electric power supply. The device comprises a first phase contact (1), a second phase contact (2) and a grounded, movable contact (4), which is partly a first layer, where the contact (4) is isolated from the phases, and a second layer, where the contact is connected to the phase contacts and then the earths and short-circuit phases. The device can be characterized in that the first phase contact and the second phase contact are axially displaced from each other and that they are arranged around the movable contact, and that the contact is cylindrical and comprises two circumferentially arranged contact areas (18, 19; 34, 35), which are axially offset from each other and intended to connect to the phase contacts in the second layer, so that the phases are short-circuited and grounded via the contact, and that the device comprises electrically insulating areas (32; 33), which are arranged to abut the phase contacts in the first layer. Fig. 1
    公开号:SE1251191A1
    申请号:SE1251191
    申请日:2012-10-19
    公开日:2014-04-20
    发明作者:Jan Karlsson；Samuel Dahl
    申请人:Samuel Dahl；Jan Karlsson；
    IPC主号:
    专利说明:

    l0 l5 20 25 30 35 increases personal safety and the malfunction from an arc fault is limited to the time for checking the cause of the fault. The material damage then becomes negligible. However, this presupposes that the short circuit is completed within approx. 5 ms.
    A common procedure for shorting the network is that the phases are short-circuited sequentially, ie. one phase at a time. US 2,930,87O, however, shows a variant in which a contact closes all the phases momentarily by the phases being arranged in a circumferential plane around a grounded contact, which can be moved up and down to short-circuit the phases. However, the contact device shown in US 2,930,87O is complicated in its construction and rather awkward.
    The present invention aims to provide a device which quickly short-circuits the phases and which is simple in its design with few components and which is not associated with the disadvantages shown with the device in US 2,930,870.
    The device according to the invention is characterized in that the first phase contact and the second phase contact are axially displaced from each other and that they are arranged around the movable contact, and that the movable contact is cylindrical and comprises two circumferentially arranged contact areas, which contact areas are axially displaced from each other and that the two contact areas are intended to connect to the two phase contacts in the second position, so that the phases are short-circuited and grounded via the movable contact, and that the device comprises electrically insulating areas, which are arranged to abut against the phase contacts in the first position. the situation.
    The invention will be described in more detail below with reference to the accompanying drawings. Figure 1 shows an embodiment of the device according to the invention in cross section, which device comprises a housing, phase contacts, a grounded, fixed contact, a movable contact and a Thomson coil.
    Figure 2 shows an alternative embodiment of the device in figure 1.
    Figure 3 shows a preferred embodiment of a phase contact.
    Figure 4 shows an alternative embodiment for the grounding of the movable contact.
    Figure 5 shows a variant of the embodiment in Figure 4.
    The device according to the invention comprises an electrically insulating, cylindrical housing 5 with cylindrical walls 6. In the walls 6 of the housing 5 a first phase contact 1, a second phase contact 2 and a third phase contact 3 are arranged. On the outside of the housing 5, each phase contact 1, 2, 3 is connected to each phase in the electric power network in which the device operates. The phase contacts 1, 2, 3 are axially displaced from each other, so that the necessary electrical insulation is obtained between the phases. The housing 5 is suitably made of an electrically insulating polymeric material.
    Furthermore, the device comprises an upper, cylindrical, grounded, fixed contact 7, which is shown in Figures 1 and 2. The grounded, fixed contact 7 is arranged in the upper part of the housing 5, in the center of the housing 5 and extends out of the housing 5 on its outside. Near the lower edge of the fixed contact 7 a circumferential contact element 16 is arranged. A cavity 10 is formed between the outer surface 8 of the fixed contact and the inner outer surface 9 of the housing. The device also comprises a lower, cylindrical, axially movable contact 4 with cylindrical walls 12.
    The movable contact 4 is open at its upper, first end 13 and has a closed bottom portion 24 at its lower, second end 14. The open end portion of the movable contact at the first end 13 encloses the fixed contact 7 in such a way that the fixed contact 7 contact elements 16 are in electrical contact with the inner circumferential surface 15 of the movable contact 4. The movable contact 4 walls 12, at the first end 13, are thus located in the cavity 10. The movable contact 4 can occupy a first position, where the movable contact 4 the contact is isolated from the phase contacts 1, 2, 3, partly a second position, where the movable contact 4 is connected to the three phase contacts and then short-circuits and earths the three phase contacts. The movable contact 4 is grounded by the fixed contact 7 during the entire movement of the movable contact 4 from the open, first position to the coupled, second position.
    The electrical connection between the movable contact 4 and the phase contacts 1-3 is provided via three contact elements 18-20, 21-23. Figure 1 shows a first preferred embodiment, where the three contact elements 18-20 are arranged circumferentially around the walls 12 on the outer casing surface 25 of the movable contact 4. The three contact elements 18-20 are axially displaced from each other along the movable contact 4 and their mutual distances have the same distance as the distances between the three phase contacts 1-3.
    The contact elements 18-20 are arranged to connect to the respective phase contact 1-3 in the connected, second position. In the open, first position, the contact elements 18-20 are in a position below their respective phase contacts 1-3 and are then electrically isolated from the phase contacts 1-3.
    An insulating air gap 32 is formed between the contact elements 18-20, in that the movable contact 4 has a diameter in this area which is smaller than the outer diameter at the contact elements 18-20. In the open, first position the upper contact element 18 is insulated by the fact that the upper, first spirit 13 of the movable cylinder is located below the first phase contact 1. The two second contact elements 19-20 are insulated by that the air gap 32 is in the positions at the two phase contacts 2, 3.
    Figure 2 shows an alternative embodiment of the device, where the contact elements 21-23 between the movable contact 4 and the phase contacts 1-3 are arranged on the phase contacts 1-3 at the inner jacket surface 9 of the cradles 6. The movable contact 4 is designed with three circumferentially arranged contact surfaces 34-36 on the movable surface 25 of the movable contact. The contact surfaces 34-36 are arranged to connect in the coupled, second layer to each contact contact 1-3 contact elements 21-23. In the open, first position, the contact surfaces 34-36 are in a position below their respective phase contacts 1-3 and are then electrically isolated from the phase contacts 1-3. Between the contact surfaces 34-36, two isolation areas 33 are arranged on the outer surface of the movable contact. In the open, first layer, the uppermost contact surface 34 is insulated by the upper, first spirit 13 of the movable cylinder being below the first phase contact 1. The two second contact surfaces 35-36 are insulated by the isolation areas 32 being in the positions at the two phase contacts 2, 3.
    Common to the two embodiments in Figures 1 and 2 is that the movable contact 4 has an insulating layer 32, 33 between the contact areas 18-20, 34-36 of the movable contact 4.
    To effect the movement of the movable contact 4, the device comprises a Thomson coil 17, which is arranged in the bottom portion of the housing 5 and the pads below the bottom portion 24 of the movable contact 4. When a strong current pulse runs through the Thomson coil 17, The Thomson coil 17 a magnetic field in the bottom portion 24 of the movable contact 10 15 The force from the magnetic field throws the movable contact 4 up to the coupled, second position, so that the respective phases of the phase contacts 1-3 are short-circuited and grounded.
    Figure 3 shows a preferred embodiment of a phase contact 1-3. The phase contact is designed as a connection terminal to the electricity grid. The phase contact has a circular-shaped recess 26 for accommodating the movable contact 4. The outer surface 27 of the recess 26 is intended to be in electrical contact with the movable contact 4 via the contact elements 18-23. At one end of the phase contact 1-3, a connecting portion 28 is arranged for connection to a phase in the electric power grid. In the current path between the connecting portion 28 and the circular recess 26, the phase contact has a U-shaped recess 28, which controls the feed direction of the current.
    The rushing short-circuit currents give rise to large magnetic forces and the U-shaped recess 29 prevents these forces from throwing the movable contact 4 laterally. The recess 29 controls and divides the rushing current so that the mechanical impact on the movable contact 4 is minimized.
    Figures 4 and 5 show an alternative embodiment concerning the earthing of the movable contact 4. Instead of using the upper, fixed contact 4 according to Figures 1 and 2, a fixed, circumferential earthing contact 30 is used instead, which is arranged in the walls 6 of the house 5.
    The earthing contact 30 earths the movable contact 4 on its outside via a circumferential contact element 31, which is arranged circumferentially on the outer circumferential surface of the movable contact 4. In Figure 4, the ground contact 31 is arranged in the walls 6 at the bottom portion of the housing 5 and the contact element 31 is arranged near the lower, other end 14 of the movable contact 4. In Figure 5 the ground contact 31 is arranged in the walls 6 at the upper 10 of the housing 5. The portion and the contact element 31 are arranged near the upper, first end 13 of the movable contact.
    Said contact elements 16, 18-23, 31 suitably consist of a continuously continuous, helical spring with good conductivity. It is understood, however, that other types of contact elements could also be applicable to be arranged on the movable contact 4 and / or the phase contacts 1-3.
    In use, the device is normally in an open, first position, as shown in Figures 1 and 2. The contact areas 18-20 of the movable contact 4; 34-36 are then located below the phase contacts 21-23 of the phase contacts 1-3. In this position, the insulating areas 32, 33 of the movable contact are located at the contact areas 21-23 of the phase contacts. In the event that a light arc is detected, a current pulse will trigger the Thomson coil to throw away the movable contact 4 to a coupled, second position (not shown in the figure). The movable contact 4 contact areas 18-20; 34-36 will then be in the position at the contact contacts 21-23 of the phase contacts 1-3. The phases will then be short-circuited and grounded, so that the arc is extinguished.
    Due to the unique design of the movable contact 4, it becomes possible to short-circuit all three phases momentarily at the same moment. This geometry results in a completed short circuit after a short movement, the length of which corresponds to an insulation distance plus contact engagement.
    The invention has been described above on the basis of specific embodiments. It will be appreciated, however, that other embodiments and variants are also possible within the scope of the appended claims. For example, it is not necessary for the invention to short-circuit all three phases simultaneously. The device is also applicable to short-circuit only two of the phases, although short-circuiting of all l0 l5 three phases is preferred. The contact elements can also be made in an alternative manner to what is shown in the above embodiments with contact springs. Although a Thomson coil is preferred for moving the movable contact 4 from the first layer to the second layer, it will be appreciated that other types of power generating devices may also be used. Examples of such devices can be other types of coils or powerful spring packages.
    权利要求:
    Claims (8)
    [1]
    Coupling device for short-circuiting and grounding at least two phases in an electric power grid, which device comprises: - a first phase contact (1), which is connected to a first phase in the electric power grid, - a second phase contact (2), which is connected to a second phase in the electric power supply, and - a grounded, movable contact (4), which can occupy a first layer, where the movable contact (4) is isolated from the phases (1, 2), and a second position, where the contact are connected to the phase contacts (1, 2) and then ground and short the phases with each other, characterized in that the first phase contact (1) and the second phase contact (2) are axially offset from each other and that they are arranged around the movable contact (4), and that the movable contact (4) is cylindrical and comprises two circumferentially arranged contact areas (18, 19; 34, 35), which contact areas are axially displaced from each other and that the two contact areas are intended to connect to the two phase contacts (1, 2) in it the second layer, so that the phases are short-circuited and grounded via the movable contact (4), and that the device comprises electrically insulating areas (32; 33), which are arranged to abut against the phase contacts (1, 2) in the first layer.
    [2]
    Device according to claim 1, characterized in that the device comprises a grounded, fixed contact (7, 30), which groundes the movable contact (4) in the second layer.
    [3]
    Device according to claim 2, characterized in that the movable contact (4) via its inner jacket surface (15) is in electrical contact the fixed contact (7). 10 15 20 25 30 10
    [4]
    Device according to Claim 2, characterized in that the movable contact (4) is in electrical contact with the fixed contact (30) via its outer outer surface.
    [5]
    Device according to one of Claims 1 to 4, characterized in that the electrically insulating region (32) of the movable contact (4) consists of an air gap (32).
    [6]
    Device according to Claim 5, characterized in that the air gap (32) is formed by the diameter of the movable contact at the contact areas being larger than the diameter at the insulating area (32).
    [7]
    Device according to any one of claims 1-6, characterized in that the device comprises a Thomson coil (17) for transmitting kinetic energy to the movable contact (4), when the movable contact (4) is to move from the first layer to the second made.
    [8]
    Device according to one of Claims 1 to 7, characterized in that the respective phase contact (1, 2) has a recess (29) in its current path for controlling the feed direction of the current.
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    同族专利:
    公开号 | 公开日
    WO2014062114A1|2014-04-24|
    EP2909855B1|2016-12-14|
    US20150270084A1|2015-09-24|
    AU2013332473A1|2015-05-14|
    US9318294B2|2016-04-19|
    EP2909855A1|2015-08-26|
    SE536707C2|2014-06-10|
    AU2013332473B2|2015-07-23|
    EP2909855A4|2016-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2930870A|1958-04-24|1960-03-29|Siemens Ag|High speed switch|
    DE1440180B1|1961-07-24|1969-12-11|Siemens Ag|Switching device with mechanical energy store with pneumatic or hydraulic charging of the energy store via a pressure piston|
    US3246101A|1963-06-12|1966-04-12|Dante A Caputo|Longitudinally reciprocatable, slidable action, multi-contact relay|
    DE2818914A1|1978-04-28|1979-10-31|Siemens Ag|SWITCH COMBINATION FOR BUSBAR SYSTEMS|
    EP0008513A1|1978-08-18|1980-03-05|George Caton|Switch arrangement for three-phase electrical supply|
    DE59009511D1|1990-03-28|1995-09-14|Siemens Ag|Quick switch.|
    SE9404455L|1994-12-22|1996-06-23|Asea Brown Boveri|Electrical switchgear|
    WO2000022641A1|1998-10-09|2000-04-20|Siemens Aktiengesellschaft|Medium voltage switch|
    SE518234C2|2001-01-11|2002-09-10|Abb Ab|Electrical device, current limiter, electric power grid and use of a current limiter|
    FR2925213B1|2007-12-18|2009-11-27|Schneider Electric Ind Sas|ELECTRIC SHORT CIRCUITRY COMPRISING AN AUTONOMOUS PYROTECHNIC ACTUATOR AND INTERNAL ARC PROTECTION ASSEMBLY COMPRISING SUCH A SHORT CIRCUIT BREAKER|
    CN101763957B|2009-12-18|2013-11-27|张正周|Spring contact for electric conduction|
    SE535376C2|2010-12-07|2012-07-17|Jan Karlsson|Device for fast short-circuit and grounding of phases in a power grid|
    EP2511928B1|2011-04-11|2018-10-03|ABB Schweiz AG|Switch having two sets of contact elements and two drives|
    EP2546848B1|2011-07-14|2014-09-03|ABB Technology AG|Fast switch with non-circular Thomson coil|US9536691B1|2014-07-10|2017-01-03|Google Inc.|Axial relay|
    EP3696840B1|2019-02-18|2021-10-20|ABB Schweiz AG|Earthing module|
    KR102355564B1|2021-06-23|2022-02-08|주식회사 엘파워|Arc eliminator of switchgear, distribution panel, connection panel, control panel|
    法律状态:
    2018-05-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1251191A|SE536707C2|2012-10-19|2012-10-19|Device for fast short-circuit and grounding of phases in a power grid|SE1251191A| SE536707C2|2012-10-19|2012-10-19|Device for fast short-circuit and grounding of phases in a power grid|
    EP13847164.4A| EP2909855B1|2012-10-19|2013-10-04|Device for rapid short-circuiting and earthing of the phases in a power network|
    AU2013332473A| AU2013332473B2|2012-10-19|2013-10-04|Device for rapid short-circuiting and earthing of the phases in a power network|
    PCT/SE2013/051169| WO2014062114A1|2012-10-19|2013-10-04|Device for rapid short-circuiting and earthing of the phases in a power network|
    US14/435,304| US9318294B2|2012-10-19|2013-10-04|Device for rapid short-circuiting and earthing of the phases in a power network|
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