• 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:
    High-voltage switchgear comprising vacuum switches-type circuit breakers (2) and disconnectors (7) arranged one above the other in a single-phase insulated design. Control shafts (3, 9) are arranged for the circuit breaker and the disconnector, respectively. Two different types of single-phase oiling are used for the circuit breaker and disconnector unit and for phase lines emanating from the power plant (8). The single-phase insulation consists of | uftiso | e-ring and screen walls (6) for the circuit breaker and disconnector unit (2, 7) and waste material, preferably shrink plastic (14), on the surface of the outgoing phase line (8). (Fig. 1)
    公开号:SE1050637A1
    申请号:SE1050637
    申请日:2010-06-18
    公开日:2011-12-19
    发明作者:Bertil Moritz；Lars Hjort
    申请人:Otto Electric Ltd；
    IPC主号:
    专利说明:

    2025302high alternating currents and under high voltage. SF6 also has better insulation propertiesper, which is used to get shorter insulation distances. However, the SF6 gas is a greenhousegas and therefore requires cumbersome and expensive handling, not just becausethat it requires the use of a gas-tight container or tank but also becauseit contributes negatively to the greenhouse effect.
    In addition, this gas has been shown to give, at each breaking process, from the corrosionpoint of view, gives rise to aggressive residues.
    Various other constructions of circuit-breaker units are also previously known,such as constructions when a formed electric arc is to be extinguishedby means of a directed strong air flow or air shock, put under a high overpressure,and with the airflow or shock directly directed towards the output of the expected arcwidth and length. This of course means extra equipment that complicates andincreases the cost of switchgear construction.
    It is also previously known that in the case of switchgear for 3-phase networks, single-phase isolate each and every oneone of the individual and live conductors from the switchgear on onein such a way that any emerging estimates will only be possiblebetween one of these phases and earth potential and never directly between the phases. Thisproved to require a complex geometric design of the parts used andvery bulky constructions within the switchgear.
    It can also be mentioned that it is in itself previously known that a generatingpressure (vacuum) of a volume of air circulating a breaking point to helpduce the construction of and / or the effect of an arc over the breaking point andalso contribute to being able to extinguish the tendency to an formed arc. These socalled vacuum circuit breakers are insulated in known designs with complicated shape on solidinsulation. The solid insulation is often epoxy casting resin. Baking in a complex geo-meter with moving parts in epoxy is a very expensive solution.
    In summary, it can be stated that known switchgear requiredand / or complex constructions and / or the use of environmentally soundless suitable substances such as transformer oil, SF6 gas and the like.The object of the present invention is to provide oneswitchgear where the above-mentioned disadvantages have been eliminated and an air-insulated compactworks are obtained.2025303This task has been solved by using two different types of single-phase insulationturned for the circuit breaker and disconnector unit and for those from the underside of the switchgearoutgoing phase lines.
    In this way, the switchgear can be arranged regardless of the atmospheresurrounds the switchgear. This is achieved in particular by the single-phase insulation forthe circuit breaker and disconnector unit consists of air insulation.
    The single-phase insulation of the phase line extending on the lower side of the switchgearconsists of art material, preferably of shrink plastic applied to the phase line.
    Thanks to simple geometry, several types of insulating layers can be applied. As an alternativealternatives to shrink plastic, you can, for example, dip the conductors in thermosetting or thermoplastic. Oneanother option is to varnish the conductors with several layers.
    With the circuit breaker included in the circuit breaker and disconnector unit,is seen in this context a switch that can break currents of at least 2000 A andwhich does not require e.g. SF6 gas as switching medium or insulating medium. Therefore,advantageously turns a vacuum breaker or other circuit breaker known per sewhich is compact without requiring SF6 gas as the breaking medium or insulating medium. Thisentails, among other things, a significant saving of space.
    With a construction according to the invention where the circuit breaker and disconnectorthe unit is housed in a space where atmospheric pressure air forms the single-phase insulationand where the space is separated from the part of the switchgear from which the phase line issignificant advantage is achieved in that the outgoing phase line can be routed indesired direction independent of the direction of the circuit breaker and disconnector unitcontrols.
    The separation of the space with the circuit breaker and disconnector unit fromthe lower side of the switchgear with the outgoing phase line located there, is advantageously made up ofa grounded electrically conductive bottom beam. Several bottom beams formtogether a grounded mezzanine, floor. Especially if this bottom beam is a partof the switchgear or cabinet construction of the switchgear, a well-accessible surface is obtained.of the disconnector in its off position.
    The separating bottom beam advantageously supports a phase bushing ofsuitable electrically insulating material, such as thermoplastic that is glass fiber reinforced(which is a significantly cheaper solution than conventional implementations used so far.rings of cast resin, epoxy, etc. The output of the circuit breaker and disconnector unitThe single conductor can be directly connected to the plastic-insulated one via the phase bushing2025304the phase line on the underside. By designing the phase bushing with a creepdistance, any contamination of the air insulation may be taken into account.the ring, such as moisture, salinity, dust particles and the like.
    When designing the switchgear for three-phase systems, the phases in the space are forcircuit breaker and disconnector unit separated from each other by an electrically isolatedwall. This ensures that an overshoot and an arc formation are effective.tively prevented between the phases. Since the single-phase insulation for circuit-breakers andthe separator unit consists of air insulation, no pressure relief is required for it eithertank in which the switchgear is housed because the single-phase insulation avoidsarc can occur between the phases.
    By arranging the circuit breakers in the three-phase system in line with each other,wherein the respective associated disconnectors are also in line with each other,a well-suited stretch is reached for the respective control shaft for the circuit breakers andthe disconnectors. These control shafts are advantageously parallel to each other and arearranged to be manually operated.
    By grounding the control shafts, they can penetrate the separating wallsphases without density requirements. An imaginary arc always hits earth before it can reachanother phase.
    The hand-independent operation of the actuating shafts on and offis remotely triggered and takes place with the help of spring forces acting on the control shafts.
    Thus, for example, the control shaft of the disconnectors may include or consist of atorsion spring, with whose spring force connection and / or disconnection takes place.
    With the switchgear according to the invention is obtained, since the single-phase insulation onthe circuit breaker and disconnector unit side consists of air insulation of atmospheric pressure,a very advantageous opportunity to expand switchgear by interconnectingseveral switchgear wall to wall. In this case, suitable openings are accommodated in the switchgear walland the high-voltage supply conductors are routed directly between the interconnected switchgear. Reach-thus need a special seal against gas / air leakage to or from the atmospherenot taken.
    Thus, each switchgear can be prepared for such connection bycorresponding switchgear walls are provided with a removable cover plate. At sam-operation of two or more switchgear, these cover plates are removed and the respectiverails in each switchgear are screwed together. This means asignificant advantage relative to known switchgear, in particular relative to those with SF62025305closed thoughts, where you can not directly access the rail system. At theseknown switchgear, the switchgear units must be provided with bushings andcostly so-called Elbow cable connections to be able to connect andconnect the same.
    It is also advisable that the switchgear's air-insulating internal space is freeassociated with the surrounding external atmosphere. This is done with advantage via filters.
    Additional advantages and embodiments of the switchgear according to the inventionThe result will be apparent from the following description, which is given in conjunctionwith accompanying drawings, thereFig. 1 shows a section from the side through the switchgear according to the invention,Fig. 2 shows the switchgear according to Fig. 1 in perspective but without operating mechanism androtated 180 degrees andFig. 3 shows a section lll - lll through the switchgear according to Fig. 2.
    The following description of the switchgear according to the present inventionillustrates its basic structure for a three-phase application for onehigh voltage networks.
    The sectional view according to Fig. 1 thus shows an exemplary three-phase embodiment.form of the switchgear according to the invention seen from the side. The switchgear is housed in one, oneinner space forming enclosure 1 consisting of a sheet metal tank. Each phase R, S, Ttakes a circuit breaker 2, preferably of the vacuum type, above a disconnector 7. Afirst operating shaft 3 is arranged to operate via a link 4 with insulating part 17switch connector 5 of the circuit breaker 2 to and from the incoming voltagefeed feed rail 13. A second operating shaft 9 is provided for operatingof the disconnector 7 between a ground contact 18 and a switch contact 19.3 and 9 are regulated by means of a (not shown, per se known) operation.vermechanism 12. It is manually controlled by remote control.
    The circuit breaker and disconnector unit 2, 7 is mounted via a support insulator 15on a bottom beam 10. The support insulator 15 is designed as a bushing of fiberglassreinforced thermoplastic for a line 8 extending from the switchgear at the bottom.ning 8 proceeds to a bushing 11 extending from the switchgear enclosure 1, onwhose outside connection can be made for electricity distribution to other appliances.
    The essential feature of the switchgear according to the invention is best seen fromFig. 2, where the switchgear is shown in perspective and where the same reference numeralsused as in Fig. 1 for corresponding components. The feature is that2025306find in the combination of two different single-phase insulation, partly the one that consists of air ofatmospheric pressure, which generally prevails both within the switchgear 1's enclosure 1 and outsidethis, partly the one with which the outgoing line 8 is provided. Thus, themade as a metal conductor insulated with shrink plastic 14 or other insulationmaterial, as illustrated by the detail shown in FIG. 1. This meansthat despite the fact that only air of atmospheric pressure is used as single-phase insulation otherwise sothe switchgear can be made compact.
    Simple flat insulating screens 6, arranged between each of the phasesR, S, T in the area of the circuit breaker and disconnector unit 2, 7, constitute a single phase isolator.ring in the upper space. These screens 6 ensure that no estimates arecomes between the different phase voltages. A disconnection of the disconnector 7 meanstherefore only carries that a possible arc occurs at the contact knife 7 of the separator 7movement towards the ground contact 18, which is arranged on the bottom beam 10 and to whichthe disconnector 7 is connected at its off position.
    Because it is often required that they leave the switchgear via the bushing11 outgoing lines shall be directed in the same direction as the control shafts 3,9, problems often arise with the geometry of the wiring 8and consequent insulation. Through the insulation technology that characterizes itIn the present invention, this problem has been completely eliminated.
    In addition, by providing the bushings 11 with each onehätta16 obtained a good transition between leader and implementation. This hoodis preferably made of silicone rubber. On the outside of the bushing 11, ie on that partlocated inside the tank, silicone rubber with a special shape can be provided which increasescreep distance and is hydrophobic. This prevents creep estimates and at the same time allows onemore compact design. Thus a good insulating ability is obtained even if ituse the air insulation would be contaminated with contaminants in the form of moisture,ter, dust particles and the like. This also means that the space insidethe enclosure 1 can be free from communication with the current prevailing outside the switchgearmosfären. Preferably, a filter-provided opening is accommodated in the wall of the enclosure 1air exchange due to changes in air pressure in the atmosphere.
    Since the switchgear's internal space as phase insulation uses air from the atmospherefirst pressure, an expansion of the switchgear can be achieved with small means. Thustwo or more switchgear are combined to lie next to each other. The one-the action that needs to be taken is to open openings for the busbars 137performance between the various combined switchgear. Any action against gasor air leakage is not required.
    The above description has focused on a particular embodiment ofthe switchgear according to the invention. Of course, various modifications and further developmentsbe made without the concept of invention, as expressed in the followingrequirements, for that reason are waived.
    权利要求:
    Claims (18)
    [1]
    High-voltage switchgear comprising circuit breakers (2) and disconnectors (7) arranged in series one above the other in a single-phase insulated design and with control shafts (3, 9) for the circuit breaker (2) and the disconnector (7), respectively, characterized in that two different types of single-phase insulation is used for the circuit breaker and disconnector unit (2, 7) and for phase lines (8) emanating from the switchgear at the bottom.
    [2]
    Switchgear according to Claim 1, characterized in that the single-phase insulation is air insulation and screens (6) between the phases of the circuit-breaker and disconnector unit (2, 7).
    [3]
    Switchgear according to Claim 1 or 2, characterized in that the single-phase insulation for the phase line (8) emanating from the switchgear on the lower side is made of artificial material (14) directly applied to the surface of the phase line (8).
    [4]
    Switchgear according to Claim 3, characterized in that the single-phase insulation of the phase line (8) extending on the lower side consists of shrink plastic (14) applied to the phase line (8).
    [5]
    Switchgear according to Claim 1 or 2, characterized in that the circuit breaker (2) is of the vacuum switch type.
    [6]
    Switchgear according to one of the preceding claims, characterized in that the circuit breaker and disconnector unit (2, 7) is housed in a space where air of atmospheric pressure and the screens (6) form the single-phase insulation, which space is separated from the part of the switchgear with phase-leading phase line on the underside.
    [7]
    Switchgear according to Claim 6, characterized in that the separation of the space for the circuit breaker and disconnector unit (2, 7) from the part of the switchgear with a phase line (8) extending at the bottom consists of an electrically conductive bottom beam (10) connected to earth. ). 20 25 30 9
    [8]
    Switchgear according to claim 7, characterized in that the conductive bottom beam (10) forms part of the compartment or cabinet construction (1) in which the switchgear is housed.
    [9]
    Switchgear according to Claim 6 or 7, characterized in that the bottom beam (10) carries a phase bushing (15) of thermoplastic for discharging the outgoing, phase-insulated phase line (8), which is connected on the upper side of the phase bushing (15) to the circuit breaker. and the underside of the separator unit (2, 7).
    [10]
    10. is provided with a cap (16), preferably of silicone rubber. Switchgear according to Claim 9, characterized in that the phase bushing (11)
    [11]
    Switchgear according to Claim 9 or 10, characterized in that on the outside of the part of the bushing (11) which lies inside the tank, silicone rubber with a special shape (20) is provided for extending the creep distance and which is hydrophobic.
    [12]
    12. consists of a three-phase switchgear with a separate switchgear arranged for each phase (R, S, T) according to one of the preceding claims, characterized in that the circuit breaker (2), disconnector (7) and output phase line (8), the phases in the space of the circuit breaker and disconnector units (2, 7) are separated from each other by an electrically insulating wall (6).
    [13]
    The phase system is arranged in line with each other as well as the respective associated switchgear according to claim 10, characterized in that the circuit breakers (2) in the three disconnectors (7) are operated with a control shaft (3) for the circuit breakers (2) and a control shaft ( 9) for the disconnectors (7), the control shafts (3, 9) being mutually parallel.
    [14]
    14. 9) operation is hand-independent. Switchgear according to Claim 11, characterized in that the control shafts (3,
    [15]
    15. (7) operating shaft (9) comprises a torsion bar. Switchgear according to Claim 11 or 12, characterized in that the disconnectors 10
    [16]
    Switchgear according to Claim 13, characterized in that the switching on (off) of the disconnectors (7) takes place by means of the spring force of the torsion spring (9).
    [17]
    Switchgear according to one of Claims 11 to 14, characterized in that it is expandable by connecting several air-insulated three-phase switchgear wall to wall with common high-voltage supply conductors (13), which for each phase (R, S, T) are passed directly between the interconnected three-phase switchgear through removable openings in their walls.
    [18]
    Switchgear according to one of the preceding claims, characterized in that the air-insulating inner space of the switchgear is freely connected to the outer atmosphere surrounding the switchgear via filters.
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    同族专利:
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    SE534914C2|2012-02-14|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5483416A|1994-12-12|1996-01-09|Hubbell Incorporated|Adjustable insulating barrier arrangement for air insulated padmounted switchgear|
    JP3667150B2|1999-05-21|2005-07-06|三菱電機株式会社|Gas-filled switchgear|
    JP2002159109A|2000-11-20|2002-05-31|Mitsubishi Electric Corp|Gas isolation switching device|
    JP4197702B2|2006-01-31|2008-12-17|株式会社日立製作所|Vacuum insulated switchgear|
    ITMI20062161A1|2006-11-10|2008-05-11|Vei Power Distrib S P A|TRIPOLAR EQUIPMENT FOR A COMPARTMENT IN MEDIUM OR HIGH VOLTAGE AND ITS COMPARTMENT INCLUDING THIS TRIPOLAR EQUIPMENT|
    DE202007008579U1|2007-06-15|2007-09-06|Siemens Ag|Air-insulated switch cell for a medium-voltage contactor switch|
    CN201408929Y|2009-03-31|2010-02-17|青岛特锐德电气股份有限公司|Air switch cabinet|CN102820625A|2012-08-10|2012-12-12|赫兹曼电力（广东）有限公司|Circuit breaker switch cabinet|
    US10290437B1|2013-03-15|2019-05-14|Innovative Switchgear IP, LLC|Interrupter spring guide assembly|
    EP2979290B1|2013-03-28|2016-07-13|ABB Technology Ltd|A knife switch, a switching device comprising a knife switch and a switchgear|
    CN110350437B|2018-04-08|2021-08-10|Abb 瑞士股份有限公司|Gas insulated switchgear and insulating spacer therefor|
    EP3671990B1|2018-12-19|2021-11-24|ABB Schweiz AG|Three phase switchgear or control gear|
    ES1229542Y|2019-03-28|2019-08-09|Ormazabal Y Cia S L U|Gas insulated electrical switchgear for electrical distribution networks|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050637A|SE534914C2|2010-06-18|2010-06-18|Single phase insulation consisting of air insulation and screens|SE1050637A| SE534914C2|2010-06-18|2010-06-18|Single phase insulation consisting of air insulation and screens|
    PCT/SE2011/050778| WO2011159248A1|2010-06-18|2011-06-17|Switchgear with single-phase insulation comprising air and screens|
    CN201180030091.8A| CN102986100B|2010-06-18|2011-06-17|There is the switchgear of the single-phase isolation including air and screen|
    EP11796064.1A| EP2583365A4|2010-06-18|2011-06-17|Switchgear with single-phase insulation comprising air and screens|
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