EP3417467B1 - Arrangement for the surge protection of an electrical device isolated with a dielectric fluid - Google Patents

Arrangement for the surge protection of an electrical device isolated with a dielectric fluid Download PDF

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Publication number
EP3417467B1
EP3417467B1 EP17716480.3A EP17716480A EP3417467B1 EP 3417467 B1 EP3417467 B1 EP 3417467B1 EP 17716480 A EP17716480 A EP 17716480A EP 3417467 B1 EP3417467 B1 EP 3417467B1
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EP
European Patent Office
Prior art keywords
arrangement
housing
feedthrough
contact
drive
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EP17716480.3A
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German (de)
French (fr)
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EP3417467A1 (en
Inventor
Markus Sulitze
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Siemens Energy Global GmbH and Co KG
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Siemens AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Definitions

  • the invention relates to an arrangement according to the preamble of claim 1.
  • Surge arresters are used to divert impermissible voltages, e.g. as a result of a lightning strike in an overhead line, to earth and in this way to protect other devices such as transformers.
  • surge arresters contain metal oxide elements that are hardly electrically conductive below a threshold voltage due to the design, but have good electrical conductivity above the threshold voltage.
  • Such surge arresters can be found in the product brochure " High-voltage surge arresters - Product guide ", Siemens AG 2012, Order No. E50001-G630-A249-X-4A00 , known.
  • the capacitor winding consists of a special paper impregnated with epoxy resin under vacuum.
  • an arrester has been flanged to the bushing at the installation site of the transformer, if necessary using adapter rings or adapter housings.
  • the housing of the arrester is opened via a manhole in order to establish an electrically conductive contact between the bushing and the arrester.
  • the housing of the arrester is then filled with a protective gas such as a little sulfur hexafluoride.
  • the object of the invention is to provide an arrangement for overvoltage protection of an electrical installation which is insulated with an insulating liquid and which is comparatively easy to put into operation and to maintain.
  • the invention solves this problem by an arrangement according to claim 1.
  • the contact device which can be mechanically driven from outside the housing enables completely pre-assembled transport from the production site to the installation site. Possibly. it can even be filled with a protective gas before transport, so that no gas work is required on site when installing an electrical high-voltage system. There is no need to open a maintenance flap for putting the arrangement into operation or for separating the resistance column and carrying out maintenance work. As a result, assembly can be carried out more quickly and easily, which saves costs.
  • the contact device has a threaded rod which is designed to absorb a rotary movement from outside the housing and to move a contact connected to the resistance column, the contact being movable towards or away from a mating contact on the bushing .
  • a threaded rod is a simple mechanical construction to translate a rotational movement into a longitudinal movement along the axis of the rod; therefore it has been tried and tested for a long time and is inexpensive to use.
  • the electrical installation insulated with insulating liquid has a high-voltage transformer. This is advantageous because high-voltage transformers have to be regularly protected against impermissible overvoltages.
  • the insulating liquid is an oil.
  • the protective gas contains sulfur hexafluoride.
  • the bushing has a first part which is designed such that, in the assembled state, it protrudes into a housing of the electrical system and is surrounded by the insulating liquid.
  • the bushing has a second part which is designed such that it protrudes into the housing surrounding the resistance column and is surrounded by the protective gas in the assembled state.
  • a maintenance flap is provided for access to a contact area between the resistance column and the bushing.
  • the maintenance flap is often referred to as a manhole in the case of arresters, since a technician has access to the components located inside the housing after opening the flap.
  • the contact device can be driven by a drive arranged on the housing. This is an advantage because in this way the surge arrester can be switched on or off without opening the protective gas-insulated housing area.
  • the drive is a manual drive. This is an advantage because of a manual drive, for example with a hand crank, inexpensive and easy to manufacture.
  • the drive is an electric drive.
  • an electric drive e.g. can be automated by means of an electric motor by a control device on site or by means of remote control by a control center.
  • the Figure 1 shows an embodiment of an arrangement 1 according to the invention for overvoltage protection of an electrical installation 2 insulated with an insulating liquid 5.
  • the installation is an oil-insulated high-voltage transformer with a housing 20 which is filled with an oil 5.
  • a resistance column 3 with resistance elements 19 is provided, which is arranged in a housing 4 filled with an electrically insulating protective gas 6 such as, for example, sulfur hexafluoride (SF6).
  • a bushing 7 for connecting the electrical system 2 to the resistance column 3 has a first part 17 which, in the assembled state, protrudes into the housing 20 of the electrical system 2 and is surrounded by the insulating liquid 5.
  • a first flange 15 connects the housing 20 and the bushing 7.
  • a second part 18 of the bushing 7 protrudes into the housing 4 surrounding the resistance column 3 and is surrounded by the protective gas 6.
  • a second flange 14 connects the housing 4 and the bushing 7.
  • a contact device 8, 9, 10, 11 that can be driven mechanically from outside the housing for closing and / or disconnecting an electrical connection between the Resistance column 8 and the implementation 7 is provided.
  • the resistance elements are metal oxide semiconductors, which are hardly electrically conductive below a design-related voltage, but are very conductive above this voltage.
  • a manual drive 12 with a hand crank is used as the drive for the contact device 8, 9, 10, 11. This makes it possible to establish or disconnect an electrically conductive connection between the resistance column 3 and the bushing 7 without the protective gas having to be sucked off and then manually closing or disconnecting the connection by a technician via a maintenance flap 13. This simplifies the use of the arrangement considerably because the arrangement can be delivered completely assembled and is particularly easy to maintain even after it has been put into operation. Since there is no need to mount the arrangement on site, adapter rings or adapter housings no longer have to be mounted on site between feedthrough 7 and arrester housing 4, as was previously the case, in order to connect flanges that do not match one another.
  • the contact device has a threaded rod 9 which is firmly connected to a contact 8.
  • the contact 8 is designed as a bolt which can be slid in a guide 21. If the bolt 8 is pushed into a mating contact 16 on the side of the bushing 7, an electrically conductive connection is established. If the bolt 8 is completely withdrawn to the side of the guide 21, a separating distance 22 is formed which enables reliable separation by the protective gas.
  • the threaded rod 9 is held in a transmission 10, in which a second rod 11 is also provided in such a way that a rotary movement of the second rod 11 is transmitted to the threaded rod via the transmission 10, so that the threaded rod is displaced along an axis parallel to the resistance column becomes.
  • the second rod 11 has a profile or thread for this purpose, which is designed to be complementary to the thread of the threaded rod.
  • a corresponding rotary movement of the second Rod that is driven by drive 12 screw the threaded rod and bolt 8 back in the direction of the drive and in this way produce the separating distance 22.

Description

Die Erfindung betrifft eine Anordnung nach dem Oberbegriff des Anspruch 1.The invention relates to an arrangement according to the preamble of claim 1.

Überspannungsableiter dienen dazu, unzulässige Spannungen z.B. infolge eines Blitzeinschlags in eine Freileitung auf Erde abzuleiten und auf diese Weise andere Geräte wie etwa Transformatoren zu schützen. Hierfür enthalten Überspannungsableiter Metalloxidelemente, die unterhalb einer bauartbedingten Schwellenspannung kaum elektrisch leitend sind, oberhalb der Schwellenspannung aber eine gute elektrische Leitfähigkeit aufweisen. Solche Überspannungsableiter sind aus der Produktbroschüre " High-voltage surge arresters - Product guide", Siemens AG 2012, Order Nr. E50001-G630-A249-X-4A00 , bekannt.Surge arresters are used to divert impermissible voltages, e.g. as a result of a lightning strike in an overhead line, to earth and in this way to protect other devices such as transformers. For this purpose, surge arresters contain metal oxide elements that are hardly electrically conductive below a threshold voltage due to the design, but have good electrical conductivity above the threshold voltage. Such surge arresters can be found in the product brochure " High-voltage surge arresters - Product guide ", Siemens AG 2012, Order No. E50001-G630-A249-X-4A00 , known.

Aus der Produktbroschüre " EKTG 72,5 - 800 kV RIP Transformator-Gas-Durchführung" der HSP Hochspannungsgeräte GmbH, Nr. 03/12-500 TH 102-110888 aus 2012 , ist eine Hochspannungsdurchführung bekannt. Die Hochspannungsdurchführung hat einen Isolierkörper aus harzimprägniertem Papier (RIP = Resin Impregnated Paper). Der Kondensatorwickel besteht aus einem unter Vakuum mit Epoxidharz imprägnierten Spezialpapier.From the product brochure " EKTG 72.5 - 800 kV RIP transformer gas feedthrough "from HSP Hochspannungsgeräte GmbH, No. 03 / 12-500 TH 102-110888 from 2012 , a high-voltage bushing is known. The high-voltage bushing has an insulating body made of resin-impregnated paper (RIP = Resin Impregnated Paper). The capacitor winding consists of a special paper impregnated with epoxy resin under vacuum.

Bisher wird am Aufstellungsort des Transformators an die Durchführung ein Ableiter angeflanscht, ggf. unter Verwendung von Adapterringen oder Adaptergehäusen. Das Gehäuse des Ableiters wird über ein Mannloch geöffnet, um einen elektrisch leitfähigen Kontakt zwischen Durchführung und Ableiter herzustellen. Anschließend wird das Gehäuse des Ableiters mit einem Schutzgas wie etwas Schwefelhexafluorid gefüllt.So far, an arrester has been flanged to the bushing at the installation site of the transformer, if necessary using adapter rings or adapter housings. The housing of the arrester is opened via a manhole in order to establish an electrically conductive contact between the bushing and the arrester. The housing of the arrester is then filled with a protective gas such as a little sulfur hexafluoride.

Eine gattungsgemäße Anordnung ist aus der Druckschrift EP0224074A2 bekannt. Ferner befassen sich die Druckschriften DE102012217310A1 , EP2854141A1 und EP2466596A1 mit Überspannungsableitern.A generic arrangement is from the document EP0224074A2 known. The publications also deal DE102012217310A1 , EP2854141A1 and EP2466596A1 with surge arresters.

An die Erfindung stellt sich die Aufgabe, eine Anordnung zum Überspannungsschutz einer mit einer Isolierflüssigkeit isolierten elektrischen Anlage anzugeben, die vergleichsweise einfach in Betrieb zu setzen und zu warten ist.The object of the invention is to provide an arrangement for overvoltage protection of an electrical installation which is insulated with an insulating liquid and which is comparatively easy to put into operation and to maintain.

Die Erfindung löst diese Aufgabe durch eine Anordnung gemäß Anspruch 1.The invention solves this problem by an arrangement according to claim 1.

Es ist ein wesentlicher Vorteil der vorliegenden Erfindung, dass mittels der mechanisch von außerhalb des Gehäuses antreibbaren Kontaktvorrichtung ein komplett vormontierter Transport vom Herstellungsort zum Montageort ermöglicht wird. Ggf. kann sogar schon eine Befüllung mit einem Schutzgas vor dem Transport erfolgen, so dass vor Ort beim Anbau an einer elektrischen Hochspannungsanlage keinerlei Gasarbeiten mehr von Nöten sind. Ein Öffnen einer Wartungsklappe zum Inbetriebsetzen der Anordnung oder zum Trennen von Widerstandssäule und Durchführung für Wartungsarbeiten entfallen. Hierdurch kann die Montage schneller und einfacher erfolgen, was Kosten einspart.It is an essential advantage of the present invention that the contact device which can be mechanically driven from outside the housing enables completely pre-assembled transport from the production site to the installation site. Possibly. it can even be filled with a protective gas before transport, so that no gas work is required on site when installing an electrical high-voltage system. There is no need to open a maintenance flap for putting the arrangement into operation or for separating the resistance column and carrying out maintenance work. As a result, assembly can be carried out more quickly and easily, which saves costs.

In einer bevorzugten Ausführungsform der erfindungsgemäßen Anordnung weist die Kontaktvorrichtung eine Gewindestange auf, die ausgebildet ist, eine Drehbewegung von außerhalb des Gehäuses aufzunehmen und einen mit der Widerstandssäule verbundenen Kontakt zu verschieben, wobei der Kontakt zu einem Gegenkontakt an der Durchführung hin oder davon weg bewegbar ist. Eine Gewindestange ist eine einfache mechanische Konstruktion, um eine Drehbewegung in eine Längsbewegung entlang der Achse der Stange zu übersetzen; daher ist sie lange erprobt und kostengünstig einzusetzen.In a preferred embodiment of the arrangement according to the invention, the contact device has a threaded rod which is designed to absorb a rotary movement from outside the housing and to move a contact connected to the resistance column, the contact being movable towards or away from a mating contact on the bushing . A threaded rod is a simple mechanical construction to translate a rotational movement into a longitudinal movement along the axis of the rod; therefore it has been tried and tested for a long time and is inexpensive to use.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung weist die mit Isolierflüssigkeit isolierte elektrische Anlage einen Hochspannungstransformator auf. Dies ist vorteilhaft, weil Hochspannungstransformatoren regelmäßig vor unzulässigen Überspannungen geschützt werden müssen.In a further preferred embodiment of the arrangement according to the invention, the electrical installation insulated with insulating liquid has a high-voltage transformer. This is advantageous because high-voltage transformers have to be regularly protected against impermissible overvoltages.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung ist die Isolierflüssigkeit ein Öl.In a further preferred embodiment of the arrangement according to the invention, the insulating liquid is an oil.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung enthält das Schutzgas Schwefelhexafluorid. In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung weist die Durchführung einen ersten Teil auf, der derart ausgebildet ist, dass er im montierten Zustand in ein Gehäuse der elektrischen Anlage hineinragt und von der Isolierflüssigkeit umgeben ist.In a further preferred embodiment of the arrangement according to the invention, the protective gas contains sulfur hexafluoride. In a further preferred embodiment of the arrangement according to the invention, the bushing has a first part which is designed such that, in the assembled state, it protrudes into a housing of the electrical system and is surrounded by the insulating liquid.

Gemäß der Erfindung weist die Durchführung einen zweiten Teil auf, der derart ausgebildet ist, dass er in das die Widerstandssäule umgebende Gehäuse hineinragt und im montierten Zustand von dem Schutzgas umgeben ist. Dies ist ein Vorteil, weil die Anordnung durch die teilweise Integration der Durchführung in den Ableiterteil besonders platzsparend und leicht gebaut werden kann, was Kosten in Herstellung und Transport einspart.According to the invention, the bushing has a second part which is designed such that it protrudes into the housing surrounding the resistance column and is surrounded by the protective gas in the assembled state. This is an advantage because the arrangement can be built in a particularly space-saving and lightweight manner due to the partial integration of the bushing into the arrester part, which saves costs in production and transport.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung ist eine Wartungsklappe für einen Zugang zu einem Kontaktbereich zwischen Widerstandssäule und Durchführung vorgesehen. Die Wartungsklappe wird bei Ableitern häufig auch als Mannloch bezeichnet, da ein Techniker nach Öffnen der Klappe Zugang zu den im Inneren des Gehäuses liegenden Bauteilen erhält.In a further preferred embodiment of the arrangement according to the invention, a maintenance flap is provided for access to a contact area between the resistance column and the bushing. The maintenance flap is often referred to as a manhole in the case of arresters, since a technician has access to the components located inside the housing after opening the flap.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung ist die Kontaktvorrichtung von einem am Gehäuse angeordneten Antrieb antreibbar. Dies ist ein Vorteil, weil auf diese Weise ein Zuschalten oder Abschalten des Überspannungsableiters erreicht werden kann, ohne den schutzgasisolierten Gehäusebereich zu öffnen.In a further preferred embodiment of the arrangement according to the invention, the contact device can be driven by a drive arranged on the housing. This is an advantage because in this way the surge arrester can be switched on or off without opening the protective gas-insulated housing area.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung ist der Antrieb ein manueller Antrieb. Dies ist ein Vorteil, weil ein manueller Antrieb, beispielsweise mit einer Handkurbel, kostengünstig und einfach herzustellen ist.In a further preferred embodiment of the arrangement according to the invention, the drive is a manual drive. This is an advantage because of a manual drive, for example with a hand crank, inexpensive and easy to manufacture.

In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Anordnung ist der Antrieb ein elektrischer Antrieb. Dies ist ein Vorteil, weil ein elektrischer Antrieb z.B. mittels eines Elektromotors durch eine Steuereinrichtung vor Ort oder mittels Fernsteuerung durch eine Leitstelle automatisierbar ist.In a further preferred embodiment of the arrangement according to the invention, the drive is an electric drive. This is an advantage because an electric drive e.g. can be automated by means of an electric motor by a control device on site or by means of remote control by a control center.

Zur besseren Erläuterung der Erfindung zeigt in schematischer Darstellung die

Figur 1
ein Ausführungsbeispiel einer erfindungsgemäßen Anordnung.
For a better explanation of the invention shows in a schematic representation
Figure 1
an embodiment of an arrangement according to the invention.

Die Figur 1 zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Anordnung 1 zum Überspannungsschutz einer mit einer Isolierflüssigkeit 5 isolierten elektrischen Anlage 2. Die Anlage ist ein Ölisolierter Hochspannungstransformator mit Gehäuse 20, das mit einem Öl 5 befüllt ist. Es ist eine Widerstandssäule 3 mit Widerstandselementen 19 vorgesehen, die in einem mit einem elektrisch isolierenden Schutzgas 6 wie z.B. Schwefelhexafluorid (SF6) gefüllten Gehäuse 4 angeordnet ist. Eine Durchführung 7 für das Verbinden der elektrischen Anlage 2 mit der Widerstandssäule 3 weist einen ersten Teil 17 auf, der im montierten Zustand in das Gehäuse 20 der elektrischen Anlage 2 hineinragt und von der Isolierflüssigkeit 5 umgeben ist. Ein erster Flansch 15 verbindet das Gehäuse 20 und die Durchführung 7. Ein zweiter Teil 18 der Durchführung 7 ragt in das die Widerstandssäule 3 umgebende Gehäuse 4 hinein und ist von dem Schutzgas 6 umgeben. Ein zweiter Flansch 14 verbindet das Gehäuse 4 und die Durchführung 7.The Figure 1 shows an embodiment of an arrangement 1 according to the invention for overvoltage protection of an electrical installation 2 insulated with an insulating liquid 5. The installation is an oil-insulated high-voltage transformer with a housing 20 which is filled with an oil 5. A resistance column 3 with resistance elements 19 is provided, which is arranged in a housing 4 filled with an electrically insulating protective gas 6 such as, for example, sulfur hexafluoride (SF6). A bushing 7 for connecting the electrical system 2 to the resistance column 3 has a first part 17 which, in the assembled state, protrudes into the housing 20 of the electrical system 2 and is surrounded by the insulating liquid 5. A first flange 15 connects the housing 20 and the bushing 7. A second part 18 of the bushing 7 protrudes into the housing 4 surrounding the resistance column 3 and is surrounded by the protective gas 6. A second flange 14 connects the housing 4 and the bushing 7.

Im Gehäuse 4 ist eine mechanisch von außerhalb des Gehäuses antreibbare Kontaktvorrichtung 8, 9, 10, 11 für das Schließen und/oder Trennen einer elektrischen Verbindung zwischen der Widerstandssäule 8 und der Durchführung 7 vorgesehen. Die Widerstandselemente sind Metalloxidhalbleiter, die unterhalb einer bauartbedingten Spannung kaum elektrisch leitend sind, oberhalb dieser Spannung jedoch sehr gut leitfähig sind. Als Antrieb für die Kontaktvorrichtung 8, 9, 10, 11 kommt ein Handantrieb 12 mit einer Handkurbel zum Einsatz. Hierdurch ist es möglich, eine elektrisch leitende Verbindung zwischen der Widerstandssäule 3 und der Durchführung 7 herzustellen oder zu trennen, ohne dass das Schutzgas abgesaugt und anschließend über eine Wartungsklappe 13 durch einen Techniker ein manuelles Schließen oder Trennen der Verbindung durchgeführt werden muss. Dies vereinfacht den Einsatz der Anordnung erheblich, weil die Anordnung komplett montiert ausgeliefert werden kann und auch nach Inbetriebnahme besonders einfach zu warten ist. Da eine Vorort-Montage der Anordnung entfällt, müssen auch nicht mehr wie bisher üblich Adapterringe oder Adaptergehäuse vor Ort zwischen Durchführung 7 und Ableitergehäuse 4 montiert werden, um ggf. nicht zueinander passende Flansche zu verbinden.In the housing 4 is a contact device 8, 9, 10, 11 that can be driven mechanically from outside the housing for closing and / or disconnecting an electrical connection between the Resistance column 8 and the implementation 7 is provided. The resistance elements are metal oxide semiconductors, which are hardly electrically conductive below a design-related voltage, but are very conductive above this voltage. A manual drive 12 with a hand crank is used as the drive for the contact device 8, 9, 10, 11. This makes it possible to establish or disconnect an electrically conductive connection between the resistance column 3 and the bushing 7 without the protective gas having to be sucked off and then manually closing or disconnecting the connection by a technician via a maintenance flap 13. This simplifies the use of the arrangement considerably because the arrangement can be delivered completely assembled and is particularly easy to maintain even after it has been put into operation. Since there is no need to mount the arrangement on site, adapter rings or adapter housings no longer have to be mounted on site between feedthrough 7 and arrester housing 4, as was previously the case, in order to connect flanges that do not match one another.

Die Kontaktvorrichtung weist eine Gewindestange 9 auf, die mit einem Kontakt 8 fest verbunden ist. Der Kontakt 8 ist als ein Bolzen ausgebildet, der in einer Führung 21 gleitend verschiebbar ist. Wird der Bolzen 8 in einen Gegenkontakt 16 auf der Seite der Durchführung 7 eingeschoben, so wird eine elektrisch leitende Verbindung hergestellt. Wird der Bolzen 8 komplett auf die Seite der Führung 21 zurückgezogen, so wird eine Trennstrecke 22 ausgebildet, die durch das Schutzgas eine sichere Trennung ermöglicht. Die Gewindestange 9 ist in einem Getriebe 10 gehalten, in der auch eine zweite Stange 11 derart vorgesehen ist, dass eine Drehbewegung der zweiten Stange 11 über das Getriebe 10 auf die Gewindestange übertagen wird, so dass die Gewindestange entlang einer Achse parallel zu der Widerstandssäule verschoben wird. Im Einfachsten Fall weist die zweite Stange 11 hierfür ein Profil oder ein Gewinde auf, das komplementär zum Gewinde der Gewindestange ausgebildet ist. Im dargestellten geschlossenen Zustand könnte eine entsprechende Drehbewegung der zweiten Stange, die vom Antrieb 12 angetrieben wird, die Gewindestange und den Bolzen 8 in Richtung des Antriebs zurückschrauben und auf diese Weise die Trennstrecke 22 herstellen.The contact device has a threaded rod 9 which is firmly connected to a contact 8. The contact 8 is designed as a bolt which can be slid in a guide 21. If the bolt 8 is pushed into a mating contact 16 on the side of the bushing 7, an electrically conductive connection is established. If the bolt 8 is completely withdrawn to the side of the guide 21, a separating distance 22 is formed which enables reliable separation by the protective gas. The threaded rod 9 is held in a transmission 10, in which a second rod 11 is also provided in such a way that a rotary movement of the second rod 11 is transmitted to the threaded rod via the transmission 10, so that the threaded rod is displaced along an axis parallel to the resistance column becomes. In the simplest case, the second rod 11 has a profile or thread for this purpose, which is designed to be complementary to the thread of the threaded rod. In the illustrated closed state, a corresponding rotary movement of the second Rod that is driven by drive 12, screw the threaded rod and bolt 8 back in the direction of the drive and in this way produce the separating distance 22.

Claims (10)

  1. Overvoltage protection arrangement (1) for an electrical system (2) insulated by way of an insulating fluid (5), having a resistor column (3) containing resistor elements (19) and that is arranged in a housing (4), and
    a feedthrough (7) for connecting the electrical system (2) to the resistor column (3),
    characterized in that
    the housing (4) is designed to be filled with an electrically insulating protective gas (6), and in that
    a contact device (8, 9, 10, 11), able to be driven mechanically from outside the housing, for closing and/or disconnecting an electrical connection between the resistor column (8) and the feedthrough (7) is provided in the housing (4), and in that
    the feedthrough (7) has a second part (18) that is designed such that it projects into the housing (4) surrounding the resistor column (3) and is surrounded by the protective gas (6) in the installed state.
  2. Arrangement (1) according to Claim 1, characterized in that the contact device (8, 9, 10, 11) has a threaded rod (9) that is designed to receive a rotational movement from outside the housing (4) and to displace a contact (8) connected to the resistor column (3), wherein the contact (8) is able to be moved towards or away from a mating contact (16) on the feedthrough (7) by way of the rotational movement.
  3. Arrangement (1) according to Claim 1 or 2, characterized in that the electrical system (2) insulated by insulating fluid (5) comprises a high-voltage transformer.
  4. Arrangement (1) according to one of the preceding claims, characterized in that the insulating fluid (5) is an oil.
  5. Arrangement (1) according to one of the preceding claims, characterized in that the protective gas (6) contains sulfur hexafluoride.
  6. Arrangement (1) according to one of the preceding claims, characterized in that the feedthrough (7) has a first part (17) that is designed such that it projects into a housing (20) of the electrical system (2) and is surrounded by the insulating fluid (5) in the installed state.
  7. Arrangement (1) according to one of the preceding claims, characterized in that a maintenance flap (13) for access to a contact region is provided between the resistor column (8) and the feedthrough (7).
  8. Arrangement (1) according to one of the preceding claims, characterized in that the contact device (8, 9, 10, 11) is able to be driven by a drive (12) arranged on the housing (4).
  9. Arrangement (1) according to Claim 8, characterized in that the drive (12) is a manual drive.
  10. Arrangement (1) according to Claim 8 or 9, characterized in that the drive (12) is an electric drive.
EP17716480.3A 2016-04-19 2017-03-29 Arrangement for the surge protection of an electrical device isolated with a dielectric fluid Active EP3417467B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016206580.7A DE102016206580A1 (en) 2016-04-19 2016-04-19 Arrangement for overvoltage protection of an electrical system insulated with an insulating liquid
PCT/EP2017/057393 WO2017182244A1 (en) 2016-04-19 2017-03-29 Assembly for the overvoltage protection of an electric system which is insulated with an insulating fluid

Publications (2)

Publication Number Publication Date
EP3417467A1 EP3417467A1 (en) 2018-12-26
EP3417467B1 true EP3417467B1 (en) 2020-09-02

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EP17716480.3A Active EP3417467B1 (en) 2016-04-19 2017-03-29 Arrangement for the surge protection of an electrical device isolated with a dielectric fluid

Country Status (5)

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EP (1) EP3417467B1 (en)
KR (1) KR102102301B1 (en)
CN (1) CN109313995B (en)
DE (1) DE102016206580A1 (en)
WO (1) WO2017182244A1 (en)

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DD122742A1 (en) * 1975-08-22 1976-10-20
DE2746566C3 (en) * 1977-10-17 1981-11-26 Transformatoren Union Ag, 7000 Stuttgart High-voltage bushing for connecting transformers filled with insulating liquid to SF ↓ 6 ↓ -insulated cables or switchgear
JPS6237891A (en) * 1985-08-09 1987-02-18 株式会社東芝 Arrestor for gas insulation neutral point
US4679113A (en) * 1985-11-18 1987-07-07 Westinghouse Electric Corp. Electrical distribution apparatus having draw-out surge arrester
JPH05101868A (en) * 1991-10-08 1993-04-23 Fuji Electric Co Ltd Lightning arrester for power transmission line
JP3750279B2 (en) * 1997-05-30 2006-03-01 株式会社日立製作所 Tank type lightning arrester
DE19926950A1 (en) * 1999-06-14 2000-12-21 Abb Research Ltd Cable end fittings
JP2002025746A (en) * 2000-07-06 2002-01-25 Giga:Kk Surge-absorbing element and manufacturing method therefor
US7324319B2 (en) * 2001-09-02 2008-01-29 Phoenix Contact Gmbh & Co. Kg Surge protection device
US8259430B2 (en) * 2009-09-25 2012-09-04 John Mezzalingua Associates, Inc. Surge protection device for isolating premise devices
EP2466596B1 (en) * 2010-12-16 2013-08-28 ABB Research Ltd. Component with excess voltage protection and method for testing same
DE102011077394A1 (en) * 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Surge arresters
DE102012217310A1 (en) * 2012-09-25 2014-03-27 Siemens Aktiengesellschaft Surge arresters
PL2854141T3 (en) * 2013-09-30 2020-08-24 Siemens Aktiengesellschaft Surge arrester

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Also Published As

Publication number Publication date
CN109313995A (en) 2019-02-05
DE102016206580A1 (en) 2017-11-02
CN109313995B (en) 2020-07-31
KR20180132894A (en) 2018-12-12
WO2017182244A1 (en) 2017-10-26
EP3417467A1 (en) 2018-12-26
KR102102301B1 (en) 2020-04-21

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