• 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:
    SAMIVIANDRAG A device for fast closing of high current in a power grid partly as a normal ground copper but also as an arc eliminator in the event of an arc fault in electrical enclosures comprising three normally live fixed female contacts (l) with a smoothing fixed contact contact (8) placed before each contact, contact (2). A movable male contact (3), A driving device (6) for the movable contact (3). A reset device (7) for the movable contact (3).
    公开号:SE1001168A1
    申请号:SE1001168
    申请日:2010-12-07
    公开日:2012-06-08
    发明作者:Jan Karlsson
    申请人:Jan Karlsson；
    IPC主号:
    专利说明:

    From SE530427 a quick earther of related design is previously known, arranged with single-phase units and optimized to meet the requirements for medium voltage applications. That construction is too expensive for low voltage. The proposed three-phase design contains far fewer details and can be manufactured for less than half the cost.
    DISCLOSURE OF THE INVENTION The objects of the invention are two, 1) that after arcs have been detected in, for example, a switchgear cabinet very quickly, already for a period or about Sms, short-circuit the supply current at which the arcs cease. The system simultaneously trips the supply switch and the fault current is disconnected within approx. 50ms.
    This increases the person and drive safety and the switchgear or enclosure can be dimensioned for much lower pressure and evacuation channels from the switchgear to the air can be dispensed with. The latter is especially valuable below ground level and in mines and oil rigs, for example. The arc eliminator must be able to withstand any short-circuit current, but only needs to go towards the voltage reduced by the arcs. The eliminator is small and can easily be built into both old and new facilities. Because the lower part of the arc eliminator is earthed, only the top part of the baffle set needs to be inserted through the outer enclosure of the switchgear where it is connected to, for example, the busbar. 2) To also be used as a grounding coupler to, for example, earth the affected plant part when working in the plant. In that function, on and off can be done manually and the usual pre-locking systems are used.
    These objects are achieved according to the invention by an arc eliminator according to the features stated in the independent claim 1. Advantageous embodiments are stated in the characterizing parts of the dependent claims 2 to 8. The arc eliminator according to the invention is provided with a normally energized fixed contact per phase, a common normally earthed fixed contact and a tubular movable contact. From its starting position, the movable contact is brought into rapid motion by means of but not limited to a Thomson coil.
    When traversed by a strong current pulse, the Thomson coil creates a magnetic field in the bottom part of the movable contact. The force from the magnetic field throws the moving contact to the closed position.
    Once the combined earthing switch and arc eliminator have been reset, it is ready to perform a new switch-on.
    The combined earthing coupler and the arc eliminator have all the phases placed one after the other in the same insulating housing which has a common bottom part where the drive device is located. In order to be able to easily place the unit in dangerous systems and to access the manual reset, a hole can be made in the switchgear's outer enclosure where the live part of the combined earthing switch and arc eliminator is inserted and connected. The part that is outside the switchgear enclosure is touchable and grounded. Alternatively, the combined earthing switch and arc eliminator are placed in the earthing switch's location inside the switchgear.
    Because the movable contact is electrically free-floating when it makes contact with the first phase, contact will be established without current transition. When the contact reaches the next phase, a two-phase short-circuit occurs with a lower current than the three-phase that occurs when the third phase is closed. When the variable contact finally reaches the ground contact, the demia only needs to carry any imbalance current.
    This sequence makes it possible to build the unit three-phase but still limit the energy released at the contact closing to a manageable size. To reduce contact burning, before the phase contacts there is a detachable ear contact with resilient contact tongues that strike against the movable contact.
    DESCRIPTION OF THE DRAWINGS The invention is explained in more detail by describing an exemplary embodiment with reference to the accompanying drawing.
    DESCRIPTION OF EXEMPLARY EMBODIMENTS A combined earthing coupler and arcuate generator according to the invention includes three normally energized fixed female contacts, one for each phase (1). A common normally grounded fixed contact (2) and a movable male contact (3) The movable contact is designed as a cylinder with flat bottom (5) Part movable connector is driven by a Thomson coil (6). In the closed position, the movable contact (3) is enclosed by the fixed contacts (1) and in turn encloses the grounded contact (2). Immediately before the fixed female contacts (1) a wiping liner contact (8) is provided.
    权利要求:
    Claims (1)
    [1]
    A device for rapid short-circuiting and earthing of the phases in a power grid comprising three normally live fixed female contacts (1) with wiping pre-contacts (8), A normally grounded common fixed contact (2) A movable male contact (3), a drive device (4) ) for the movable contact (3), characterized in that the three fixed contacts (1) and the common earth contact (2) are in turn passed through by the movable contact (3) that the driving device may be a Thomson coil ( 4) which supplies kinetic energy to the bottom surface of the tubular movable contact (5) A device for fast closing of high current according to claim 1, characterized in that all phases (1) are traversed by the same movable contact. (3). A device for fast closing of high current according to claim 1, characterized in that all three phases (1) close to a common earth contact (2) A device for fast closing of high current according to claim 1, characterized in that the unit also can short-circuit without grounding, whereby the earth contact (2) can be dispensed with. . A device for fast closing of high current according to claim 1, characterized in that the fixed contacts (1) and intermediate insulation (6) are modular and stackable. A device for fast closing of high current according to claim 1, characterized in that the movable contact is electrically free-floating until it closes electrolessly to the first phase. A high current fast closing device according to claim 1, characterized in that all the phases are short-circuited before the earth contact is closed. . A device for fast closing of high current according to claim 1, characterized in that the movable contact (3) can be returned to the starting position by means of a screw device (7). A high current fast closing device according to claim 1, characterized in that before each phase contactor device the leading wiping pre-contact (8)
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    同族专利:
    公开号 | 公开日
    SE535376C2|2012-07-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2014062114A1|2012-10-19|2014-04-24|Jan Karlsson|Device for rapid short-circuiting and earthing of the phases in a power network|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1001168A|SE535376C2|2010-12-07|2010-12-07|Device for fast short-circuit and grounding of phases in a power grid|SE1001168A| SE535376C2|2010-12-07|2010-12-07|Device for fast short-circuit and grounding of phases in a power grid|
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