EP0163053B1 - Voltage surge arrester - Google Patents

Voltage surge arrester Download PDF

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Publication number
EP0163053B1
EP0163053B1 EP85103827A EP85103827A EP0163053B1 EP 0163053 B1 EP0163053 B1 EP 0163053B1 EP 85103827 A EP85103827 A EP 85103827A EP 85103827 A EP85103827 A EP 85103827A EP 0163053 B1 EP0163053 B1 EP 0163053B1
Authority
EP
European Patent Office
Prior art keywords
plug
housing
connection
arrester according
dissipating member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85103827A
Other languages
German (de)
French (fr)
Other versions
EP0163053A1 (en
Inventor
Martin Dipl.-Ing. Schuster
Dieter Dipl.-Ing. Sander
Gottfried Ing. Bäuerle (grad.)
Albert Ing. Bachmeier (Grad.)
Werner Dipl.-Ing. Heiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karl Pfisterer Elektrorechnische Spezialartikel GmbH and Co KG
Original Assignee
Karl Pfisterer Elektrorechnische Spezialartikel GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Karl Pfisterer Elektrorechnische Spezialartikel GmbH and Co KG filed Critical Karl Pfisterer Elektrorechnische Spezialartikel GmbH and Co KG
Publication of EP0163053A1 publication Critical patent/EP0163053A1/en
Application granted granted Critical
Publication of EP0163053B1 publication Critical patent/EP0163053B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
    • H01T4/20—Arrangements for improving potential distribution
    • 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
    • H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus

Definitions

  • the invention relates to a surge arrester which has the features of the preamble of claim 1.
  • the part of the plug connection that is structurally combined with the surge voltage has an angular housing made of an elastomeric material.
  • One leg of this housing is designed as a plug, the other as a socket, into which the one end section of the surge arrester, which is designed as a plug, is inserted.
  • the other end of the surge arrester housing which is also made of an elastomeric material and which contains a surge arrester body consisting of a plurality of surge arrester elements arranged in a row and consisting of a metal oxide, is provided with a protruding connecting bolt which must be connected to earth potential.
  • the disadvantage here is not only that an earth cable must be connected to the connecting bolts.
  • a modified embodiment of this surge arrester also has the same disadvantages, in which the surge arrester elements are accommodated in one leg of the angular housing and therefore cannot be separated from this housing or cannot be separated easily.
  • the housing has one end of the arrester body in an electrically conductive connection. Therefore, this surge arrester eliminates the need to connect an earthing cable. However, this surge arrester cannot be used together with a conventional plug connection for connecting cables to an encapsulated system.
  • the invention has for its object to provide a surge arrester which, if a connection to a conductor lying in an encapsulated system is required, can be installed without difficulty and in particular also retrospectively and allows convenient control and interchangeability.
  • both the housing of the arrester body and that of the part of the plug connection which is structurally combined with it are made of metal and the latter housing is electrically conductively connected to the encapsulation of the system which is at ground potential when the plug connection is made, it is only necessary to mount the surge arrester connecting the two parts of the connector. This is because both the mechanical connection and all the necessary electrical connections are made. An exchange is just as easy, because all you have to do is disconnect the connector. Since the connection to the conductor lying within the encapsulation is made via a plug connection and the part of this plug connection which is designed as a leadthrough, the encapsulation need not be opened for assembly and disassembly. The arrangement outside the encapsulation still allows for easy control.
  • the part of the plug connection which is structurally combined with the arrester body is provided with a connecting device for a cable. This makes it possible to use a part of a plug connection provided for a cable connection for the connection of the surge arrester. A carbde socket is therefore not required.
  • the plug connection can be designed in the usual way, that is to say either with an outer cone or with an inner cone of the plug, in order to achieve an electrically sealed closure of the plug socket.
  • the housing containing the arrester body is expediently designed according to claim 2, a releasable connection to the housing of the plug connection part being particularly advantageous if the plug connection part is a cable plug. Access to the arrester body then does not require opening the housing of the connector part. It is also advantageous to design the housing of the arrester body according to claim 4.
  • the conductor body can be insulated by means of a gas surrounding it, which fills the intermediate space between the conductor body and an insulator which surrounds it at a distance.
  • the arrester body can be embedded in silicone rubber.
  • an overpressure relief device is advantageously provided with an indicator: .E; en.
  • connection device with which a cable can be connected directly, for example by clamping
  • a connection device in the form of a plug connection part for a cable plug can also be provided.
  • Such an embodiment has the advantage that only the existing cable plug has to be pulled to install the surge arrester and, after the surge arrester has been plugged in, it has to be inserted into the socket of the cable plug that has become free in the socket of the surge arrester.
  • a surge arrester to be arranged outside a metal-encapsulated switch and to be connected to a conductor located within the encapsulation of the switch has a columnar arrester body 102 formed from a plurality of stacked zinc oxide disks, which concentrically surrounds a porcelain tube at a distance.
  • This porcelain tube is closed at one end by means of a disk-shaped base inserted into this end with the interposition of a seal and in a gas-tight manner.
  • the one end face of the arrester body 102 is supported on the inside of the base with the interposition of a contact plate and a prestressed spring assembly.
  • the other end face of the arrester body 102 rests on a removable, metallic cover which engages over this tube end and forms a likewise gas-tight seal with the interposition of a seal.
  • the side of the cover facing away from the arrester body 102 flies to the bottom of a cup-shaped, metallic housing 110 which concentrically surrounds the porcelain tube at a distance. Both the bottom of the housing 110 and the cover connected to it penetrate channels of a filling valve or an overpressure relief device having an indicator, both of which are arranged on the outside of the bottom of the housing 110.
  • a connecting line connected on the one hand to the contact plate is passed through the bottom in a gas-tight manner, the other end of which is connected to a dome-shaped counter-contact piece 114, the recess of which is open towards the bottom.
  • One end of a prestressed coil spring engages in this recess, the other end of which is supported on the ground.
  • the space between the housing 110 and the porcelain tube is filled with an insulating material.
  • the inside of the porcelain tube is filled with nitrogen, but could also be filled with silicone rubber, for example.
  • the housing 110 is flanged on its open side to the metallic housing of a cable connector, which is provided with a connecting device for a cable 135, which in the exemplary embodiment is a plastic-insulated, single-core cable.
  • a socket 124 is provided which engages in an opening 127 of the wall 125 of the encapsulation of the gas-insulated switch and closes this opening in a gas-tight manner.
  • the metallic housing 116 of the plug has a T-like shape.
  • the two parts 136 and 137 of the housing 116 which form the two arms extending in opposite directions, are designed as a tube piece with an annular flange for connection to the housing 110 or as a bell-like cap, which has an insertion opening for the wire 135 is provided.
  • a short cylindrical section extends at right angles to these two parts 136 and 137, followed by a conically widening section and then again by a cylindrical section. Therefore, the housing 116 can overlap the flange of the cup-shaped housing 126 of the socket 124 as well as the screws 128 and can rest against the outside of the wall 125 of the encapsulation when the plug is fully inserted into the socket 124.
  • Claws 132 lying against the outside of the conical housing section position the connector in this position in connection with the stud bolts 133 and nuts 134 arranged thereon and exert the required compressive force on it.
  • the rod 119 which penetrates a pressure body 123 and whose end section projecting over this pressure body forms the plug pin engaging in the socket body 131 of the socket or carries a contact sleeve 121 which, if necessary, can in turn carry a multi-line contact element.
  • the other end of the rod 119 carries a clamp body 138 of a screw clamp for connecting the wire 135.
  • the rod 119 can be mechanically fixed and electrical with this clamp body 138, the longitudinal axis of which lies in the longitudinal axis of the two parts 136 and 137 conductive connected or, as in the embodiment, be integrally formed.
  • the terminal body 130 is with a blind hole which is open towards part 137 of the housing 116 and lies in the terminal body length:>, into which the stripped end 135 'of the wire 135 is inserted.
  • the contact piece 120 which is contacted by the mating contact piece 114, is electrically conductively connected to the terminal body 138 via a connecting line 140.
  • the connecting line 140 is embedded up to the pressure body 123 in the insulating body 117, which lies against the inner wall of the parts 136 and 137 and over part of the length of the housing part surrounding the rod 119.
  • the section of the insulating body 117 located in part 137 of the housing is provided with a channel which is aligned with the blind hole of the terminal body 130 and in which the insulating body 117, which, as in the exemplary embodiment, consists of silicone rubber the wire insulation is present.
  • a field control body 141 embedded in the insulating body 117 contacts the guide surface lying between the wire insulation and the jacket.
  • an outwardly conically widening channel is aligned in the insulating body 117, into which a correspondingly conically shaped sealing plug 142 is inserted, which here forms an electrically sealed closure.
  • the sealing plug can be removed if access to the clamping screw 139 or, for example, the application of a test voltage to the clamp body 130 is desired.
  • the surge arrester is combined with a cable plug, no additional socket is required here. If the plug is not to be designed as an angled plug, the blind hole in the clamp body 138 could be aligned with the longitudinal axis of the rod 119. The clamping screw could then penetrate into the clamp body 138 from the side opposite the connecting line 140.
  • the plug which is structurally combined with the surge arrester can also be inserted into a socket which is intended for receiving a cable plug.
  • the connection of the cable to the plug is not made directly, but by means of a cable plug which can be inserted into a socket designated as a whole with 243. If there is no cable connection to the conductor 201 which is to be secured by means of the surge arrester and is located in the interior of the encapsulation, then the socket 243 is closed in an electrically tight manner by means of a blind plug.
  • the housing 216 of the angled plug, to which the housing 210, in which the arrester body 202 is located, is detachably connected differs from the housing 116 of the second exemplary embodiment only in that the part which is arranged coaxially with the housing 210 but points away therefrom 237 as the part 236, to which the housing 210 is screwed, is designed as a tube piece with a flange at its free end.
  • the cup-shaped housing 244, made of electrically insulating material, of the socket 243 is inserted in the part 237 of the housing 216.
  • an angled section of the rod 219 is tightly guided in the center thereof, which at its end protruding from the housing 216 forms the plug pin of the plug or, as in the exemplary embodiment, carries a contact sleeve 221 on which a multi-line contact element is arranged can.
  • the angled section of the rod 219 penetrating into the housing 244 is mechanically fixed and electrically conductive to a socket body 245 of the socket 243.
  • the contact piece 220 which connects to the arrester body 202 is connected and is contacted by the mating contact piece 214.
  • an insulating body 217 made of an elastic material, in the exemplary embodiment silicone rubber, in the housing 216 of the plug, which not only bears on the parts located in the housing 216, but also on the inside of the housing 216 , with the exception of that end section which, as in the exemplary embodiment according to FIG. 1, engages over the open end of the socket 224 which forms the passage through the wall 225 of the encapsulation.
  • the housing 310 containing the arrester body 302 is flanged to the metallic housing 316 of a plug.
  • the housing 316 of the plug to be inserted into the socket 324 is provided with two sockets 343 and 346, both of which have the same design in the exemplary embodiment, but could also have a different design.
  • the design of these two sockets 343 and 346 corresponds to the design of the socket 243 of the third embodiment. Therefore, reference is made to the statements made regarding the socket 243.
  • the socket 346 the plug which is structurally combined with the housing 316 is inserted.
  • a cable plug can be inserted into the other socket 343.
  • the embodiment according to FIG. 3 can thus be used like that according to FIG. 2 if there is no free socket in the wall of the encapsulation. It therefore differs from the exemplary embodiment according to FIG. 2 essentially only in the different type of connection between the arrester body and the plug which can be inserted into the socket 324 serving as a bushing. For further details, reference is therefore made to the explanations for the exemplary embodiment according to FIG. 2.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

Die Erfindung betrifft einen Überspannungsableiter, der die Merkmale des Oberbegriffs des Anspruches 1 aufweist.The invention relates to a surge arrester which has the features of the preamble of claim 1.

Bei einem bekannten Überspannungsableiter dieser Art (US-A-4 161 012) weist der baulich mit dem Überspannungs&uie.ter vereinigte Teil der Steckverbindung ein winkelförmiges Gehäuse aus einem elastomeren Material auf. Der eine Schenkel dieses Gehäuses ist als Stecker, der andere als Steckbuchse ausgebildet, in welche der eine, als Stecker ausgebildete Endabschnitt des Überspannungsableiters eingesteckt ist. Das andere Ende des ebenfalls aus einem elastomeren Material bestehenden Gehäuses des Überspannungsableiters das einen aus mehreren, in einer Reihe angeordneten, aus einem Metalloxid bestehenden Überspannungsableiterelementen bestehenden Ableiterkörper enthält, ist mit einem überstehenden Anschlußbolzen versehen, der auf Erdpotential gelegt werden muß. Nachteilig ist hierbei nicht nur, daß an den Verbindungsbolzen ein Erdungsseil angeschlossen werden muß. Störend ist auch, daß dieser Überspannungsableiter nur dann verwendet werden kann, wenn für den Steckverbindungsteil eine freie Steckbuchse vorhanden ist. Mit denselben Nachteilen ist auch eine abgewandelte Ausführungsform dieses Überspannungsableiters behaftet, bei welcher die Überspannungsableiterelemente im einen Schenkel des winkelförmigen Gehäuses untergebracht sind und daher nicht oder nicht ohne weiteres von diesem Gehäuse getrennt werden können.In a known surge arrester of this type (US Pat. No. 4,161,012), the part of the plug connection that is structurally combined with the surge voltage has an angular housing made of an elastomeric material. One leg of this housing is designed as a plug, the other as a socket, into which the one end section of the surge arrester, which is designed as a plug, is inserted. The other end of the surge arrester housing, which is also made of an elastomeric material and which contains a surge arrester body consisting of a plurality of surge arrester elements arranged in a row and consisting of a metal oxide, is provided with a protruding connecting bolt which must be connected to earth potential. The disadvantage here is not only that an earth cable must be connected to the connecting bolts. It is also disturbing that this surge arrester can only be used if a free socket is available for the connector part. A modified embodiment of this surge arrester also has the same disadvantages, in which the surge arrester elements are accommodated in one leg of the angular housing and therefore cannot be separated from this housing or cannot be separated easily.

Es ist ferner bekannt (US-A-3 915 534), an einem Kabelende statt eines Kabelendverschlusses den einen Teil einer Steckverbindung vorzusehen, deren anderer Teil am einen Ende eines Überspannungsableiters angeordnet ist, um diesen Überspannungsableiter in einfacher Weise an das Kabel anschließen zu können. Die in einer Reihe angeordneten, aus Aluminiumoxid bestehenden Überspannungsableiterelemente sind hierbei in einer isolierenden Hülse angeordnet, die im Abstand von einem metallischen Gehäuse umgeben ist, wobei der Zwischenraum zwischen diesem Gehäuse und der Hülse mit einem weichen Isoliermaterial gefüllt ist. Das metallische Gehäuse ist bei hergestellter Verbindung mit dem Kabel elektrisch leitend mit dem geerdeten Kabelmantel verbunden. Außerdem steht mit dem Gehäuse das eine Ende des Ableiterkörpers in elektrisch leitender Verbindung Daher entfällt bei diesem Überspannungsableiter die Notwendigkeit, ein Erdungsseil anschließen zu müssen. Zusammen mit einer üblichen Steckverbindung für den Anschluß von Kabeln an eine gekapselte Anlage ist dieser Überspannungsableiter jedoch nicht verwendbar.It is also known (US-A-3 915 534) to provide at one end of a cable instead of a cable end closure one part of a plug connection, the other part of which is arranged at one end of a surge arrester, in order to be able to connect this surge arrester to the cable in a simple manner . The surge arrester elements, which are arranged in a row and consist of aluminum oxide, are arranged in an insulating sleeve which is surrounded at a distance by a metallic housing, the space between this housing and the sleeve being filled with a soft insulating material. When the connection to the cable has been made, the metallic housing is connected in an electrically conductive manner to the grounded cable sheath. In addition, the housing has one end of the arrester body in an electrically conductive connection. Therefore, this surge arrester eliminates the need to connect an earthing cable. However, this surge arrester cannot be used together with a conventional plug connection for connecting cables to an encapsulated system.

Der Erfindung liegt die Aufgabe zugrunde, einen Überspannungsableiter zu schaffen, der dann, wenn eine Verbindung zu einem in einer gekapselten Anlage liegende Leiter erforderlich ist, ohne Schwierigkeiten und insbesondere auch nachträglich montiert werden kann sowie eine bequeme Kontrolle und Austauschbarkeit erlaubt.The invention has for its object to provide a surge arrester which, if a connection to a conductor lying in an encapsulated system is required, can be installed without difficulty and in particular also retrospectively and allows convenient control and interchangeability.

Die Aufgabe löst ein Überspannungsableiter mit den Merkmalen des Anspruches 1.The task is solved by a surge arrester with the features of claim 1.

Da sowohl das Gehäuse des Ableiterkörpers als auch dasjenige des mit ihm baulich vereinigten Teils der Steckverbindung aus Metall bestehen und das letztgenannte Gehäuse elektrisch leitend mit der auf Erdpotential liegenden Kapselung der Anlage verbunden ist, wenn die Steckverbindung hergestellt ist, bedarf es zur Montage des Überspannungsableiters nur des Zusammensteckens der beiden Teile der Steckverbindung. Dabei werden nämlich sowohl die mechanische Verbindung als auch alle erforderlichen elektrischen Verbindungen hergestellt. Ebenso einfach ist ein Austausch, weil hierzu nur die Steckverbindung gelöst zu werden braucht. Da die Verbindung mit dem innerhalb der Kapselung liegenden Leiter über eine Steckverbindung und den als Durchführung ausgebildeten Teil dieser Steckverbindung erfolgt, braucht für eine Montage und Demontage die Kapselung nicht geöffnet zu werden. Die Anordnung außerhalb der Kapselung ermöglicht weiterhin eine bequeme Kontrolle. Schließlich ist von besonderem Vorteil, daß der mit dem Ableiterkörper baulich vereinigte Teil der Steckverbindung mit einer Anschlußvorrichtung für ein Kabel versehen ist. Hierdurch ist es möglich, für den Anschluß des Überspannungsableiters einen für einen Kabelanschluß vorgesehenen Teil einer Steckverbindung zu verwenden. Eine freide Steckbuchse wird also nicht benötigt.Since both the housing of the arrester body and that of the part of the plug connection which is structurally combined with it are made of metal and the latter housing is electrically conductively connected to the encapsulation of the system which is at ground potential when the plug connection is made, it is only necessary to mount the surge arrester connecting the two parts of the connector. This is because both the mechanical connection and all the necessary electrical connections are made. An exchange is just as easy, because all you have to do is disconnect the connector. Since the connection to the conductor lying within the encapsulation is made via a plug connection and the part of this plug connection which is designed as a leadthrough, the encapsulation need not be opened for assembly and disassembly. The arrangement outside the encapsulation still allows for easy control. Finally, it is particularly advantageous that the part of the plug connection which is structurally combined with the arrester body is provided with a connecting device for a cable. This makes it possible to use a part of a plug connection provided for a cable connection for the connection of the surge arrester. A freide socket is therefore not required.

Die Steckverbindung kann in üblicher Weise, also entweder mit einem Außenkonus oder mit einem Innenkonus des Steckers zur Erzielung eines elektrisch dichten Verschlusses der Steckbuchse ausgebildet sein.The plug connection can be designed in the usual way, that is to say either with an outer cone or with an inner cone of the plug, in order to achieve an electrically sealed closure of the plug socket.

Vorteilhafte Ausgestaltungen der erfindungsgemäßen Lösung sind in den abhängigen Ansprüchen gekennzeichnet.Advantageous embodiments of the solution according to the invention are characterized in the dependent claims.

Das den Ableiterkörper enthaltende Gehäuse ist zweckmäßigerweise gemäß Anspruch 2 ausgebildet, wobei eine lösbare Verbindung mit dem Gehäuse des Steckverbindungsteils vor allem dann von Vorteil ist, wenn es sich bei dem Steckverbindungsteil um einen Kabelstecker handelt. Der Zugang zum Ableiterkörper fordert dann nicht ein Öffnen des Gehäuses des Steckverbindungsteils. Vorteilhaft ist auch eine Ausbildung des Gehäuses des Ableiterkörpers gemäß Anspruch 4.The housing containing the arrester body is expediently designed according to claim 2, a releasable connection to the housing of the plug connection part being particularly advantageous if the plug connection part is a cable plug. Access to the arrester body then does not require opening the housing of the connector part. It is also advantageous to design the housing of the arrester body according to claim 4.

Die Isolierung des Ableiterkörpers kann mittels eines ihn umgebenden Gases erfolgen, das den Zwischenraum zwischen dem Ableiterkörper und einem diesen mit Abstand umgebenden Isolator füllt. Aber auch andere Isoliermaterialien kommen in Frage. Beispielsweise kann man den Ableiterkörper in Siliconkautschuk einbetten. Um bei einer Gasisolation in einfacher Weise Gas in den Überspannungsableiter einfüllen oder nachfüllen zu können, kann man die Merkmale des Anspruches 7 vorsehen. Außerdem ist vorteilhafterweise eine Überdruckentlastuny,ei,irichtung mit Kennmelder vorg:.E;en.The conductor body can be insulated by means of a gas surrounding it, which fills the intermediate space between the conductor body and an insulator which surrounds it at a distance. But other insulating materials are also possible. For example, the arrester body can be embedded in silicone rubber. Around in the case of gas insulation, the ability to fill or refill gas in the surge arrester in a simple manner can provide the features of claim 7. In addition, an overpressure relief device is advantageously provided with an indicator: .E; en.

Statt einer Anschlußvorrichtung, mit der ein Kabel unmittelbar, beispielsweise durch Klemmung, verbunden werden kann, kann man auch eine Anschlußvorrichtung in Form eines Steckverbindungsteiles für einen Kabelstecker vorsehen. Eine solche Ausführungsform hat den Vorteil, daß zum Einbau des Überspannungsableiters nur der vorhandene Kabelstecker gezogen und nach dem Einstecken des Überspannungsableiters in die dadurch frei gewordene Steckbuchse der Kabelstecker in die Steckbuchse des Überspannungsableiters eingesteckt zu werden braucht.Instead of a connection device with which a cable can be connected directly, for example by clamping, a connection device in the form of a plug connection part for a cable plug can also be provided. Such an embodiment has the advantage that only the existing cable plug has to be pulled to install the surge arrester and, after the surge arrester has been plugged in, it has to be inserted into the socket of the cable plug that has become free in the socket of the surge arrester.

Im folgenden ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert. Es zeigen:

  • Fig. 1 einen Längsschnitt eines ersten Ausführungsbeispiels im montierten Zustand,
  • Fig. 2 einen Längsschnitt eines zweiten Ausführungsbeibeispiels im montierten Zustand,
  • Fig. 3 einen Längsschnitt eines dritten Ausführungsbeispiels im montierten Zustand,
The invention is explained in detail below on the basis of exemplary embodiments shown in the drawing. Show it:
  • 1 is a longitudinal section of a first embodiment in the assembled state,
  • 2 shows a longitudinal section of a second exemplary embodiment in the assembled state,
  • 3 shows a longitudinal section of a third exemplary embodiment in the assembled state,

Ein außerhalb eines metallgekapselten Schalters anzuordnender und mit einem innerhalb der Kapselung des Schalters liegenden Leiter zu verbindender Uberspannungsableiter weist einen säulenförmigen, aus mehreren aufeinandergestapelten Zinkoxidscheiben gebildeten Ableiterkörper 102 auf, den im Abstand konzentrisch ein Porzellanrohr umgibt. Dieses Porzellanrohr ist an seinem einen Ende mittels eines in dieses Ende unter Zwischenlage einer Dichtung eingesetzten, scheibenförmigen Bodens fest und gasdicht verschlossen. An der Innenseite des Bodens stützt sich unter Zwischenlage einer Kontaktplatte und eines vorgespannten Federpaketes die eine Stirnseite des Ableiterkörpers 102 ab. Die andere Stirnfläche des Ableiterkörpers 102 liegt an einem abnehmbaren, metallischen Deckel an, welcher dieses Rohrende übergreift und unter Zwischenlage einer Dichtung einen ebenfalls gasdichten Verschluß bildet.A surge arrester to be arranged outside a metal-encapsulated switch and to be connected to a conductor located within the encapsulation of the switch has a columnar arrester body 102 formed from a plurality of stacked zinc oxide disks, which concentrically surrounds a porcelain tube at a distance. This porcelain tube is closed at one end by means of a disk-shaped base inserted into this end with the interposition of a seal and in a gas-tight manner. The one end face of the arrester body 102 is supported on the inside of the base with the interposition of a contact plate and a prestressed spring assembly. The other end face of the arrester body 102 rests on a removable, metallic cover which engages over this tube end and forms a likewise gas-tight seal with the interposition of a seal.

Die dem Ableiterkörper 102 abgekehrte Seite des Deckels fliegt am Boden eines topfförmigen, metallischen Gehäuses 110 an, das das Porzellanrohr konzentrisch im Abstand umgibt. Sowohl den Boden des Gehäuses 110 als auch den mit ihm verbundenen Deckel durchdringen Kanäle eines Füllventils bzw. einer einen Kennmelder aufweisenden Überdruckentlastungseinrichtung die beide an der Außenseite des Bodens des Gehäuses 110 angeordnet sind.The side of the cover facing away from the arrester body 102 flies to the bottom of a cup-shaped, metallic housing 110 which concentrically surrounds the porcelain tube at a distance. Both the bottom of the housing 110 and the cover connected to it penetrate channels of a filling valve or an overpressure relief device having an indicator, both of which are arranged on the outside of the bottom of the housing 110.

Durch den Boden ist gasdicht eine einerseits an der Kontaktplatte angeschlossene Verbindungsleitung durchgeführt, deren anderes Ende mit einem kalottenförmigen Gegenkontaktstück 114 verbunden 'ist, dessen Vertiefung zum Boden hin offen ist. In diese Vertiefung greift das eine Ende einer vorgespannten Schraubenfeder ein, deren anderes Ende sich am Boden abstützt. Der Zwischenraum zwischen dem Gehäuse 110 und dem Porzellanrohr ist mit einem Isolierstoff ausgefüllt. Das Innere des Porzellanrohres ist mit Stickstoff gefüllt, könnte aber auch beispielsweise mit Silikonkautschuk gefüllt sein.A connecting line connected on the one hand to the contact plate is passed through the bottom in a gas-tight manner, the other end of which is connected to a dome-shaped counter-contact piece 114, the recess of which is open towards the bottom. One end of a prestressed coil spring engages in this recess, the other end of which is supported on the ground. The space between the housing 110 and the porcelain tube is filled with an insulating material. The inside of the porcelain tube is filled with nitrogen, but could also be filled with silicone rubber, for example.

Das Gehäuse 110 ist an seiner offenen Seite an das metallische Gehäuse eines Kabelsteckers angeflanscht, der mit einer Anschlußvorrichtung für ein Kabel 135 versehen ist bei dem es sich im Ausführungsbeispiel um ein kunstoffisoliertes, einadriges Kabel handelt. Zur Aufnahme dieses den einen Teil einer Steckverbindung bildende Kabelsteckers ist eine Steckbuchse 124 vorgesehen, die in eine Öffnung 127 der Wand 125 der Kapselung des gasisolierten Schalters eingreift und diese Öffnung gasdicht verschließt.The housing 110 is flanged on its open side to the metallic housing of a cable connector, which is provided with a connecting device for a cable 135, which in the exemplary embodiment is a plastic-insulated, single-core cable. To accommodate this cable plug, which forms part of a plug connection, a socket 124 is provided which engages in an opening 127 of the wall 125 of the encapsulation of the gas-insulated switch and closes this opening in a gas-tight manner.

Wie Fig. 1 zeigt, hat das metallische Gehäuse 116 des Steckers eine T-ähnliche Form. Die beiden Teile 136 und 137 des Gehäuses 116, welche dessen beide sich in entgegengesetzte Richtungen erstreckende Arme bilden, sind als Rohrstück mit einem Ringflansch für die Verbindung mit dem Gehäuse 110 bzw. als eine glockenähnliche Kappe ausgebildet, welche mit einer Einführöffnung für die Ader 135 versehen ist. Im rechten Winkel zu diesen beiden Teilen 136 und 137 erstreckt sich ein kurzer zylindrischer Abschnitt, auf den ein sich konisch erweiternder Abschnitt und dann wieder ein zylindrischer Abschnitt folgt. Daher kann das Gehäuse 116 den Flansch des becherförmigen Gehäuses 126 der Steckbuchse 124 sowie die Schrauben 128 übergreifen und an der Außenseite der Wand 125 der Kapselung anliegen, wenn der Stecker vollständig in die Steckbuchse 124 eingesteckt ist, An der Außenseite des konischen Gehäuseabschnitts anliegende Pratzen 132 positionieren in Verbindung mit den Stehbolzen 133 und auf diesen angeordneten Muttern 134 den Stecker in dieser Lage und üben die erforderliche Druckkraft auf ihn aus.As shown in FIG. 1, the metallic housing 116 of the plug has a T-like shape. The two parts 136 and 137 of the housing 116, which form the two arms extending in opposite directions, are designed as a tube piece with an annular flange for connection to the housing 110 or as a bell-like cap, which has an insertion opening for the wire 135 is provided. A short cylindrical section extends at right angles to these two parts 136 and 137, followed by a conically widening section and then again by a cylindrical section. Therefore, the housing 116 can overlap the flange of the cup-shaped housing 126 of the socket 124 as well as the screws 128 and can rest against the outside of the wall 125 of the encapsulation when the plug is fully inserted into the socket 124. Claws 132 lying against the outside of the conical housing section position the connector in this position in connection with the stud bolts 133 and nuts 134 arranged thereon and exert the required compressive force on it.

Der Stab 119, welcher einen Druckkörper 123 durchdringt und dessen über diesen Druckkörper überstehender Endabschnitt den in den Buchsenkörper 131 der Steckbuchse eingreifenden Steckerstift bildet oder eine Kontakthülse 121 trägt, die ihrerseits, sofern erforderlich, ein Viellinienkontaktelement tragen kann. Das andere Ende des Stabes 119 trägt einen Klemmenkörper 138 einer Schraubklemme zum Anschluß der Ader 135. Der Stab 119 kann mit diesem Klemmenkörper 138, dessen Längsachse in der Längsachse der beiden Teile 136 und 137 liegt, mechanisch fest und elektrisch leitende verbunden oder, wie im Ausführungsbeispiel, einstückig ausgebildet sein. Der Klemmenkörper 130 ist mit einer zum Teil 137 des Gehäuses 116 hin offenen, in der Klemmenkörperläng:>ac;,se liegenden SacklochbohrunS ,&< sehen, in welche das abisolierte Ende 135' der Ader 135 eingeführt wird. Von der dem Stab 119 gegenüberliegenden Seite her dringt eine Gewindebohrung, in der eine Klemmschraube 139 geführt ist, in die Sacklochbohrung ein. Mit dieser Klemmschraube 139 wird der Endabschnitt 135' im Klemmenkörper 138 festgelegt.The rod 119, which penetrates a pressure body 123 and whose end section projecting over this pressure body forms the plug pin engaging in the socket body 131 of the socket or carries a contact sleeve 121 which, if necessary, can in turn carry a multi-line contact element. The other end of the rod 119 carries a clamp body 138 of a screw clamp for connecting the wire 135. The rod 119 can be mechanically fixed and electrical with this clamp body 138, the longitudinal axis of which lies in the longitudinal axis of the two parts 136 and 137 conductive connected or, as in the embodiment, be integrally formed. The terminal body 130 is with a blind hole which is open towards part 137 of the housing 116 and lies in the terminal body length:>, into which the stripped end 135 'of the wire 135 is inserted. A threaded hole, in which a clamping screw 139 is guided, penetrates into the blind hole from the side opposite the rod 119. With this clamping screw 139, the end section 135 'is fixed in the clamp body 138.

Über eine Verbindungsleitung 140 ist das Kontaktstück 120, welches von dem Gegenkontaktstück 114 kontaktiert wird, elektrisch leitend mit dem Klemmenkörper 138 verbunden.The contact piece 120, which is contacted by the mating contact piece 114, is electrically conductively connected to the terminal body 138 via a connecting line 140.

Die Verbindungsleitung 140 ist ebenso wie der Klemmenkörper 130 und der Stab 119 bis zum Druckkörper 123 in den Isolierkörper 117 eingebettet, welcher an der Innenwand der Teile 136 und 137 sowie auf einem Teil der Länge des den Stab 119 umgebenden Gehäuseteils anliegt. Um die Ader 135 in die Klemme einführen zu können, ist der im Teil 137 des Gehäuses liegende Abschnitt des Isolierkörpers 117 mit einem auf die Sacklochbohrung des Klemmenkörpers 130 ausgerichteten Kanal versehen, in welchem der Isolierkörper 117, der wie im Ausführungsbeispiel aus Silikonkautschuk besteht, an der Aderisolation anliegt. Ein in den Isolierkörper 117 eingebetteter Feldsteuerkörper 141 kontaktiert die zwischen Aderisolation und Mantel liegende Leitfläche.The connecting line 140, like the clamp body 130 and the rod 119, is embedded up to the pressure body 123 in the insulating body 117, which lies against the inner wall of the parts 136 and 137 and over part of the length of the housing part surrounding the rod 119. In order to be able to insert the wire 135 into the terminal, the section of the insulating body 117 located in part 137 of the housing is provided with a channel which is aligned with the blind hole of the terminal body 130 and in which the insulating body 117, which, as in the exemplary embodiment, consists of silicone rubber the wire insulation is present. A field control body 141 embedded in the insulating body 117 contacts the guide surface lying between the wire insulation and the jacket.

Auf die Gewindebohrung des Klemmenkörpers 138, in welcher die Klemmschraube 139 geführt ist, ist im Isolierkörper 117 ein sich nach außen konisch erweiternder Kanal ausgerichtet, in den ein entsprechend konisch ausgebildeter Verschlußstopfen 142 eingesetzt ist, der hier einen elektrisch dichten Verschluß bildet. Der Verschlußstopfen kann entfernt werden, wenn ein Zugang zur Klemmschraube 139 oder beispielsweise das Anlegen einer Prüfspannung an den Klemmenkörper 130 gewünscht wird.On the threaded bore of the clamp body 138, in which the clamping screw 139 is guided, an outwardly conically widening channel is aligned in the insulating body 117, into which a correspondingly conically shaped sealing plug 142 is inserted, which here forms an electrically sealed closure. The sealing plug can be removed if access to the clamping screw 139 or, for example, the application of a test voltage to the clamp body 130 is desired.

Da der Überspannungsableiter mit einem Kabelstecker kombiniert ist, ist hier keine zusätzliche Steckbuchse erforderlich. Sofern der Stecker nicht als Winkelstecker ausgebildet sein soll, könnte die Sacklochbohrung im Klemmenkörper 138 mit der Längsachse des Stabes 119 fluchten. Die Klemmschraube könnte dann von der der Verbindungsleitung 140 gegenüberliegenden Seite her in den Klemmenkörper 138 eindringen.Since the surge arrester is combined with a cable plug, no additional socket is required here. If the plug is not to be designed as an angled plug, the blind hole in the clamp body 138 could be aligned with the longitudinal axis of the rod 119. The clamping screw could then penetrate into the clamp body 138 from the side opposite the connecting line 140.

Bei dem in Fig. 2 dargestellten Ausführungsbeispiel kann der mit dem Überspannungsableiter baulich vereinigte Stecker eben falls in eine Steckbuchse eingesetzt werden, welche für die Aufnahme eines Kabelsteckers bestimmt ist. Die Verbindung des Kabels mit dem Stecker erfolgt jedoch nicht direkt, sondern mittels eines Kabelsteckers, welcher in eine als Ganzes mit 243 bezeichnete Steckbuchse eingeführt werden kann. Ist kein Kabelanschluß an den mittels des Überspannungsableiters abzusichernden, im Inneren der Kapselung liegenden Leiter 201 vorgesehen, dann wird die Steckbuchse 243 mittels eines Blindsteckers elektrisch dicht verschlossen.In the exemplary embodiment shown in FIG. 2, the plug which is structurally combined with the surge arrester can also be inserted into a socket which is intended for receiving a cable plug. However, the connection of the cable to the plug is not made directly, but by means of a cable plug which can be inserted into a socket designated as a whole with 243. If there is no cable connection to the conductor 201 which is to be secured by means of the surge arrester and is located in the interior of the encapsulation, then the socket 243 is closed in an electrically tight manner by means of a blind plug.

Da wesentliche Teile dieses zweiten Ausführungsbeispiel in gleicher Weise ausgebildet sind wie bei dem ersten Ausführungsbeispiel, sind im folgenden für sich entsprechende Teile um hundert größere Bezugszahlen verwendet.Since essential parts of this second exemplary embodiment are designed in the same way as in the first exemplary embodiment, corresponding parts by one hundred larger reference numbers are used below.

Das Gehäuse 216 des Winkelsteckers, mit dem das Gehäuse 210, in dem sich der Ableiterkörper 202 befindet, lösbar verbunden ist, unterscheidet sich von dem Gehäuse 116 des zweiten Ausführungsbeispiels nur dadurch, daß der gleichachsig mit dem Gehäuse 210 angeordnete, jedoch von diesem wegweisende Teil 237 wie der Teil 236, an den das Gehäuse 210 angeschraubt ist, als ein Rohrstück mit einem Flansch an seinem freien Ende ausgebildet ist. In den Teil 237 des Gehäuses 216 ist das becherförmige, aus elektrisch isolierendem Material bestehende Gehäuse 244 der Steckbuchse 243 eingesetzt. Durch den Boden des Gehäuses 244 ist in dessen Zentrum ein abgewinkelter Abschnitt des Stabes 219 dicht hindurchgeführt, der an seinem aus dem Gehäuse 216 herausragenden Ende den Steckerstift des Steckers bildet oder, wie im Ausführungsbeispiel, eine Kontakthülse 221 trägt, auf der ein Viellinienkontaktelement angeordnet sein kann. Der abgewinkelte, in das Gehäuse 244 eindringende Abschnitt des Stabes 219 ist mechanisch fest und elektrisch leitend mit einem Buchsenkörper 245 der Steckbuchse 243 verbunden.The housing 216 of the angled plug, to which the housing 210, in which the arrester body 202 is located, is detachably connected, differs from the housing 116 of the second exemplary embodiment only in that the part which is arranged coaxially with the housing 210 but points away therefrom 237 as the part 236, to which the housing 210 is screwed, is designed as a tube piece with a flange at its free end. In the part 237 of the housing 216, the cup-shaped housing 244, made of electrically insulating material, of the socket 243 is inserted. Through the bottom of the housing 244, an angled section of the rod 219 is tightly guided in the center thereof, which at its end protruding from the housing 216 forms the plug pin of the plug or, as in the exemplary embodiment, carries a contact sleeve 221 on which a multi-line contact element is arranged can. The angled section of the rod 219 penetrating into the housing 244 is mechanically fixed and electrically conductive to a socket body 245 of the socket 243.

Mit dem Stab 219, im Ausführungsbeispiel über einen zweiten, abgewinkelten Abschnitt, welcher mit dem anderen, das Gehäuse 244 durchdringenden Abschnitt fluchtet, ist das die Verbindung zum Ableiterkörper 202 herstellende Kontaktstück 220 verbunden, welches vom Gegenkontaktstück 214 kontaktiert wird.With the rod 219, in the exemplary embodiment via a second, angled section, which is aligned with the other section penetrating the housing 244, the contact piece 220 which connects to the arrester body 202 is connected and is contacted by the mating contact piece 214.

Wie bei dem Ausführungsbeispiel gemäß Fig. 1 befindet sich im Gehäuse 216 des Steckers ein aus einem elastischen Material, im Ausführungsbeispiel Silikonkautschuk, bestehender Isolierkörper 217, der nicht nur an den sich im Gehäuse 216 befindenden Teilen, sondern auch an der Innenseite des Gehäuses 216 anliegt, mit Ausnahme desjenigen Endabschnitts, der wie bei dem Ausführungsbeispiel gemäß Fig. 1 das offene Ende der Steckbuchse 224 übergreift, welche die Durchführung durch die Wand 225 der Kapselung bildet.As in the exemplary embodiment according to FIG. 1, there is an insulating body 217 made of an elastic material, in the exemplary embodiment silicone rubber, in the housing 216 of the plug, which not only bears on the parts located in the housing 216, but also on the inside of the housing 216 , with the exception of that end section which, as in the exemplary embodiment according to FIG. 1, engages over the open end of the socket 224 which forms the passage through the wall 225 of the encapsulation.

Diejenigen Teile des Ausführungsbeispiels gemäß Fig. 3, welche vorstehend nicht erläutert sind, sind wie bei den Ausführungsbeispielen gemäß den Fig. 1 und 2 ausgeführt, so daß insoweit auf die dort gegebenen Erläuterungen verwiesen werden kann.Those parts of the exemplary embodiment according to FIG. 3 which have not been explained above are designed as in the exemplary embodiments according to FIGS. 1 and 2, so that reference can be made to the explanations given there.

Es wäre selbstverständlich möglich, die Steckbuchse 243 oder das den Ableiterkörper 202 enthaltende Gehäuse 210 in einer anderen Winkellage bezüglich des in die Steckbuchse 224 eingreifenden Abschnitts des Stabes 219 anzuordnen, insbesondere mit diesem fluchtend.It would of course be possible that To arrange the socket 243 or the housing 210 containing the arrester body 202 in a different angular position with respect to the section of the rod 219 which engages in the socket 224, in particular in alignment therewith.

Bei dem Ausführungsbeispiel gemäß Fig. 3 ist das den Ableiterkörper 302 enthaltende Gehäuse 310 an das metallische Gehäuse 316 eines Steckers angeflanscht. Wegen Einzelheiten kann deshalb auf die Ausführungen zu dem ersten Ausführungsbeispiel verwiesen werden. Wegen dieser Steckers ist, wie Fig. 3 zeigt, das Gehäuse 316 des in die Steckbuchse 324 einzuführenden Steckers mit zwei Steckbuchsen 343 und 346 versehen, die im Ausführungsbeispiel beide gleich ausgebildet sind, jedoch auch eine unterschiedliche Ausbildung haben könnten. Die Ausgestaltung dieser beiden Steckbuchsen 343 und 346 stimmt mit der Ausbildung der Steckbuchse 243 des dritten Ausführungsbeispiels überein. Daher wird auf die zu der Steckbuchse 243 gemachten Ausführungen Bezug genommen.In the exemplary embodiment according to FIG. 3, the housing 310 containing the arrester body 302 is flanged to the metallic housing 316 of a plug. For details, reference can therefore be made to the explanations for the first exemplary embodiment. Because of this plug, as shown in FIG. 3, the housing 316 of the plug to be inserted into the socket 324 is provided with two sockets 343 and 346, both of which have the same design in the exemplary embodiment, but could also have a different design. The design of these two sockets 343 and 346 corresponds to the design of the socket 243 of the third embodiment. Therefore, reference is made to the statements made regarding the socket 243.

In eine der beiden Steckbuchsen, im Ausführungsbeispiel die Steckbuchse 346, wird der baulich mit dem Gehäuse 316 vereinigte Stecker eingesetzt. In die andere Steckbuchse 343 kann ein Kabelstecker eingeführt werden. Das Ausführungsbeispiel gemäß Fig. 3 ist somit wie dasjenige gemäß Fig. 2 dann verwendbar, wenn keine freie Steckbuchse in der Wand der Kapselung vorhanden ist. Es unterscheidet sich deshalb von dem Ausführungsbeispiel gemäß Fig. 2 im wesentlichen nur durch die andere Art der Verbindung zwischen dem Ableiterkörper und dem in die als Durchführung dienende Steckbuchse 324 einsetzbaren Stecker. Wegen weiterer Einzelheiten wird deshalb auf die Ausführungen zu dem Ausführungsbeispiel gemäß Fig. 2 Bezug genommen.In one of the two sockets, in the exemplary embodiment the socket 346, the plug which is structurally combined with the housing 316 is inserted. A cable plug can be inserted into the other socket 343. The embodiment according to FIG. 3 can thus be used like that according to FIG. 2 if there is no free socket in the wall of the encapsulation. It therefore differs from the exemplary embodiment according to FIG. 2 essentially only in the different type of connection between the arrester body and the plug which can be inserted into the socket 324 serving as a bushing. For further details, reference is therefore made to the explanations for the exemplary embodiment according to FIG. 2.

Selbstverständlich wäre es möglich, anstelle der Y-Form des in die Steckbuchse 324 einsetzbaren Steckers und seiner beiden Steckbuchsen 343 und 346 eine andere Form, beispielsweise eine T-Form, zu wählen.Of course, it would be possible to choose a different shape, for example a T-shape, instead of the Y-shape of the plug insertable into the socket 324 and its two sockets 343 and 346.

Claims (12)

1. An arrester comprising a dissipating member (102; 202; 302) consisting of at least one metal oxide element and contained in a housing (110; 210, 310) which is structurally combined with a part of a plug-in connection which is adapted to be inserted from the outside into a corresponding part (124; 224; 324) of th plug-in connection which is provided on a bushing in the enclosure (125; 225; 325) of a switching system, and which, when the plug-in connection has been made, has the dissipating member (102; 202; 302) linked via the plug-in connection to a conductor (201) in the interior of the enclosure (125; 225; 325), characterised in that
a) both the housing (110; 210; 310) of the dissipating member (102; 202; 302) which consists of zinc oxide and also that (116; 216; 316) of one part of the plug-in connection consist of metal,
b) when the plug-in connection is made, the housing (116; 216; 316) of one part of the plug-in connection and via this housing that (110; 210; 310) of the dissipating member (102; 202; 302) is connected in electrically manner to the enclosure (125; 225; 325) which is at earth potential, and
c) one part of the plug-in connection is provided with a connecting device (138; 243; 343) for a cable.
2. An arrester according to Claim 1, characterised in that the housing (110; 210; 310) containing the dissipating member (102; 202; 302) is constituted by a part of the housing (116; 216; 316) of the plug-in connection part.
3. An arrester according to Claim 1 or 2, characterised by a separable connection in the length of conductor between the dissipating member (102; 202; 302) and a plug-in contact member (121; 221) of the plug-in connection part which comprises a contact piece (120; 220) fixed by an insulator (117; 217) of the plug-in connection part, an a matching contact member (114; 214) adapted to be pressed against it by spring force and which is constantly connected to the dissipating member (102; 202; 302).
4. An arrester according to one of Claims 1 to 3, characterised in that its housing (110; 210; 310) takes the form of a pot which is open towards the housing (116; 216; 316) of the plug-in connection part and is separably connected to a socket-like part (136; 236) of the housing of the plug-in connection part.
5. An arrester according to Claim 4, characterised by, enclosing the dissipating member (102; 202; 302) at a distance, an insulating tube sealed at one end by a metallic cover on the inside of which the disspating member (102; 202; 302) is braced in electrically conductive manner, its outside being electrically conductively fixed on the inside of the end of the pot-shaped housing (110; 210; 310).
6. An arrester according to Claim 5, characterised in that the other end of the insulating tube is sealed in gas-tight fashion by a second cover on which is supported one end of a free-tensioned spring, the other end of which presses the matching contact piece (114; 214) against the contact piece (120; 220).
7. An arrester according to one of Claims 4 to 6, characterised by a filling valve inserted into the end of the pot-shaped housing (110; 210; 310) and the cover which bears on this end.
8. An arrester according to one of Claims 4 to 7, characterised by an over-pressure relieving means inserted into the end of the pot-shaped housing (110; 210; 310) and the cover which bears on it, and comprising an indicator.
9. An arrester according to one of Claims 1 to 8, characterised in that the connecting device (243; 343) for a cable is constructed as a socket to receive a cable plug.
10. An arrester according to one of Claims 1 to 9, characterised in that the plug-in connection part is constructed as an angled plug.
11. An arrester according to one of Claims 4 to 10, characterised in that the longitudinal axis of the pot-shaped housing (110; 210) is disposed at a right-angle to the longitudinal axis of a plug pin (119; 121; 219; 221) which is adapted to be inserted into the corresponding part of the plug-in connection.
12. An arrester according to one of Claims 1 to 11, characterised in that the part which is adapted to be inserted into the corresponding part of the plug-in connection has two sockets (343; 346) for receiving a cable plug or a plug which is structurally connected to the housing (31) of the dissipating member (302) and which is electrically connected to the latter.
EP85103827A 1984-03-30 1985-03-29 Voltage surge arrester Expired EP0163053B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3411735 1984-03-30
DE19843411735 DE3411735A1 (en) 1984-03-30 1984-03-30 SURGE ARRESTERS

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