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EP0954073B1 - Overvoltage arrester element - Google Patents

Overvoltage arrester element Download PDF

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Publication number
EP0954073B1
EP0954073B1 EP99107875A EP99107875A EP0954073B1 EP 0954073 B1 EP0954073 B1 EP 0954073B1 EP 99107875 A EP99107875 A EP 99107875A EP 99107875 A EP99107875 A EP 99107875A EP 0954073 B1 EP0954073 B1 EP 0954073B1
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EP
European Patent Office
Prior art keywords
electrodes
protection element
element according
overvoltage protection
housing
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 - Lifetime
Application number
EP99107875A
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German (de)
French (fr)
Other versions
EP0954073A1 (en
Inventor
Gerd Dipl.-Ing. Kracht
Eberhard Dipl.-Ing. Lehmann
Klaus Prof. Dr.-Ing. Scheibe
Joachim Dipl.-Ing. Schimanski
Martin Dr.-Ing. Wetter
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.)
Phoenix Contact GmbH and Co KG
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Phoenix Contact GmbH and Co KG
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Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Priority to EP01116334A priority Critical patent/EP1143585B2/en
Publication of EP0954073A1 publication Critical patent/EP0954073A1/en
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    • 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 overvoltage protection element for the derivation of transients Overvoltages, with two in parallel each having a power connection electrodes arranged side by side and next to each other, one between the electrodes effective air breakdown spark gap and a receiving the electrodes Casing.
  • Such an overvoltage protection element is e.g. B. from the DE 919 056 C known.
  • Surge protection elements with an air breakdown spark gap and side by side lying electrodes are also from FR 2 389 944 A, the US 3,878,423 and known from US 3,450,923. According to US 3,878,423 Electrodes arranged one behind the other.
  • surge protection element by which the invention is based on, i.e. one with an air breakdown spark gap, there are surge protection elements with an air flashover spark gap, in which a sliding discharge occurs when activated (cf. DE 27 18 188 A1, DE 29 34 236 A1 and DE 31 01 354 A1).
  • Surge protection elements of the type from which the invention is based that is to say those with an air breakdown spark gap, have overvoltage protection elements with an air flashover spark gap the advantage of a higher surge current carrying capacity, however, the disadvantage of a higher - and not particularly constant - response voltage.
  • each electrode has a connection leg and spark horn running at an acute angle to the connecting leg and form the spark horns of the two - spaced apart - Electrodes together form the air breakdown spark gap. It is between the opposite ends of the connecting legs of the two electrodes one - a sliding discharge triggering ignition aid is provided.
  • DE 44 02 615 A1 that it is advantageous if the spark horns of the Electrodes in their areas adjacent to the connection legs with a bore are provided.
  • the above-mentioned surge protection element known from DE 44 02 615 A1 is carried out in practical implementation so that it has a surge current carrying capacity of 100 kA, on the other hand to delete network follow currents is suitable in the range of 100 A.
  • the invention is based on the object of an overvoltage protection element Provide generic type that is simple and inexpensive to build on is easily adaptable to different requirements in its manufacture and is still functional even after multiple responses.
  • the surge protection element according to the invention is now characterized in that that the electrodes have different cross sections over their length.
  • the electrodes can be cylindrical and a circular one have oval and / or a rectangular cross section.
  • Different cross sections means not only a difference in geometry, i.e. circular, oval or rectangular, but also in dimensions; the electrodes can be graduated in length across its length so that the area known as the air breakdown spark gap should be effective, specified in a special way locally can be.
  • the interior of the electrode receiving Housing is lined, the lining preferably made of POM-Teflon consists.
  • the surge protection element according to the invention serves to derive transient overvoltages and to limit surge currents, in particular of lightning impulse currents, as well as for the deletion of network follow currents; lightning impulse currents up to 100 kA can be derived and line follow currents from typically 3 to 4 kA, maximum of 25 kA or even 50 kA, can be deleted.
  • the surge protection element according to the invention consists in its essential Construction from two electrodes 3, 4, each having a current connection 1, 2 between the electrodes 3, 4 effective air breakdown spark gap 5 and one the electrodes 3, 4 housing 6.
  • the electrodes 3, 4 are arranged parallel to one another.
  • the Electrodes 3, 4 are arranged side by side; their longitudinal axes therefore fall apart.
  • the electrodes 3, 4 are cylindrical; they have a circular cross section.
  • Electrode sections 3c and 4c the largest diameter. Between the electrode sections 3c and 4c is therefore the smallest distance, so that between the Electrode sections 3c and 4c formed the air breakdown spark gap 5 is.
  • the power connections could both electrodes are on the same side.
  • the power connections 1 and 2 of both electrodes 3 and 4 are located on opposite sides. They run as is easily taken from the figures can be parallel to each other. However, exemplary embodiments are also conceivable, where the power connections of both electrodes are at an acute angle to each other.
  • the interior of the the electrodes 3, 4 housing 6 is lined, the liner preferably consists of POM-Teflon.
  • an overvoltage protection element according to the invention shown in the figures is a particularly advantageous one in that the electrodes 3, 4 receiving housing 6 is closed and pressure-resistant.
  • the Printing cylinder 10 has a printing sleeve 11, the printing sleeve 11 on one side with an external thread 12 and on the other side with an inwardly projecting Flange 13 is provided, a union nut 14 is provided and the union nut 14 is screwed onto the pressure sleeve 11.
  • the manufacture of the surge protection element according to the invention that is Manufacture of the individual parts and the assembly of these individual parts is pronounced simple and therefore inexpensive.
  • the electrodes 3, 4, the individual parts of the housing 6, namely the housing jacket 7 and the Housing flanges 8, 9, and the individual parts of the outer pressure cylinder 10, that is the pressure sleeve 11 and the union nut 14 are rotationally symmetrical Parts that are either readily available or as turned parts modern machine tools can be mass-produced.
  • each housing flange 8, 9 is both with a Through hole 15, 16, as well as provided with a blind hole 17, 18.
  • the so trained housing flanges 8, 9 thus allow both the passage of Power connections 1, 2, and - on the other side - an end bearing of the electrodes 3, 4, namely in the area of the electrode sections 3e, 4e.
  • an inventive Overvoltage protection element applies that the housing flanges 8, 9 sealing can be clamped against the cylindrical housing shell 7, with Help of the outer pressure cylinder 10, namely in that the union nut 14th is screwed onto the pressure sleeve 11.
  • the housing 6 receiving the electrodes 3, 4 can have air as the extinguishing gas; however, it can also be provided with another known extinguishing gas, for example SF 6 . Otherwise, the extinguishing gas in the electrodes 3, 4 receiving housing 6 are at atmospheric pressure, but is also conceivable, in the embodiment described, in which the electrodes 3, 4 receiving housing 6 is pressure-tight and pressure-resistant that the extinguishing gas is at a pressure deviating from the atmospheric pressure.

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Abstract

The excess voltage protection unit, to lead off transient excess voltages, has electrodes (3,4) with current connections (1,2). An air break spark stretch (5) is between the electrodes (3,4). The stretch (5) extinguishes mains current surges following the pickup voltage of lightning current, as the electrodes (3,4) are in parallel. The structure is contained within a housing (6).

Description

Die Erfindung betrifft ein Überspannungsschutzelement zur Ableitung von transienten Überspannungen, mit zwei jeweils einen Stromanschluß aufweisenden parallel zueinander und nebeneinander angeordneten Elektroden, einer zwischen den Elektroden wirksamen Luft-Durchschlag-Funkenstrecke und einem die Elektroden aufnehmenden Gehäuse. Ein solches Überspannungsschutzelement ist z. B. aus der DE 919 056 C bekannt.The invention relates to an overvoltage protection element for the derivation of transients Overvoltages, with two in parallel each having a power connection electrodes arranged side by side and next to each other, one between the electrodes effective air breakdown spark gap and a receiving the electrodes Casing. Such an overvoltage protection element is e.g. B. from the DE 919 056 C known.

Elektrische, insbesondere aber elektronische Meß-, Steuer-, Regel- und Schaltkreise, vor allem auch Fernmeldeeinrichtungen und -anlagen, sind empfindlich gegen transiente Überspannungen, wie sie insbesondere durch atmosphärische Entladungen, also durch Blitzströme, aber auch durch Kurzschlüsse und Schalthandlungen in Energieversorgungsnetzen auftreten können. Diese Empfindlichkeit hat in dem Maße zugenommen, in dem elektronische Bauelemente, insbesondere Transistoren und Thyristoren verwendet werden; vor allem sind seit vielen Jahren zunehmend eingesetzte integrierte Schaltkreise in starkem Maße durch transiente Überspannungen gefährdet.Electrical, but in particular electronic measuring, control, regulating and switching circuits, especially telecommunications equipment and systems are sensitive to transients Surges such as those caused by atmospheric discharges by lightning currents, but also by short circuits and switching operations in energy supply networks may occur. This sensitivity has increased as in which electronic components, in particular transistors and thyristors be used; above all, integrated devices have been increasingly used for many years Circuits are at great risk from transient overvoltages.

Überspannungsschutzelemente mit einer Luft-Durchschlag-Funkenstrecke und nebeneinander liegenden Elektroden sind außerdem aus der FR 2 389 944 A, der US 3,878,423 und aus der US 3,450,923 bekannt. Gemäß der US 3,878,423 sind die Elektroden hintereinander angeordnet. Neben dem Überspannungsschutzelement, von dem die Erfindung ausgeht, also einem solchen mit einer Luft-Durchschlag-Funkenstrecke, gibt es Überspannungsschutzelemente mit einer Luft-Überschlag-Funkenstrecke, bei denen also beim Ansprechen eine Gleitentladung auftritt (vgl. die DE 27 18 188 A1, die DE 29 34 236 A1 und die DE 31 01 354 A1).Surge protection elements with an air breakdown spark gap and side by side lying electrodes are also from FR 2 389 944 A, the US 3,878,423 and known from US 3,450,923. According to US 3,878,423 Electrodes arranged one behind the other. In addition to the surge protection element, by which the invention is based on, i.e. one with an air breakdown spark gap, there are surge protection elements with an air flashover spark gap, in which a sliding discharge occurs when activated (cf. DE 27 18 188 A1, DE 29 34 236 A1 and DE 31 01 354 A1).

Überspannungsschutzelemente der Art, von der die Erfindung ausgeht, also solche mit einer Luft-Durchschlag-Funkenstrecke, haben gegenüber Überspannungsschutzelementen mit einer Luft-Überschlag-Funkenstrecke den Vorteil einer höheren Stoßstromtragfähigkeit, jedoch den Nachteil einer höheren - und auch nicht sonderlich konstanten - Ansprechspannung.Surge protection elements of the type from which the invention is based, that is to say those with an air breakdown spark gap, have overvoltage protection elements with an air flashover spark gap the advantage of a higher surge current carrying capacity, however, the disadvantage of a higher - and not particularly constant - response voltage.

Es sind nun bereits verschiedene Überspannungsschutzelemente mit einer Luft-Durchschlag-Funkenstrecke entwickelt worden, die auch in Bezug auf die Ansprechspannung verbessert worden sind (vgl. die DE 41 41 681 A1, die DE 41 41 682 A1, die DE 42 44 051 A1 und die DE 44 02 615 A1).There are now various surge protection elements with an air breakdown spark gap has also been developed in terms of response voltage have been improved (cf. DE 41 41 681 A1, DE 41 41 682 A1, DE 42 44 051 A1 and DE 44 02 615 A1).

Das aus der DE 44 02 615 A1 bekannte Überspannungsschutzelement hat bereits in der Praxis erhebliche Bedeutung erlangt, wird nämlich von der Anmelderin hergestellt und unter der Bezeichnung FLASHTRAB FLT vertrieben (vgl. den Katalog '98/99 der Firma Phoenix Contact GmbH & Co., Teilkatalog 7 "TRABTECH Überspannungsschutz" und die dort gegebenen Erläuterungen zur Problematik von Überspannungen, insbesondere auf den Seiten 3 bis 5 sowie den Seiten 12 bis 17). Bei diesem bekannten Überspannungsschutzelement weist jede Elektrode einen Anschlußschenkel und ein unter einem spitzen Winkel zu dem Anschlußschenkel verlaufendes Funkenhorn auf und bilden die Funkenhörner der beiden - mit Abstand zueinander angeordneten - Elektroden zusammen die Luft-Durchschlag-Funkenstrecke. Dabei ist zwischen den sich gegenüberstehenden Enden der Anschlußschenkel der beiden Elektroden eine - eine Gleitentladung auslösende - Zündhilfe vorgesehen. Zusätzlich kann der DE 44 02 615 A1 entnommen werden, daß es vorteilhaft ist, wenn die Funkenhörner der Elektroden in ihren an die Anschlußschenkel angrenzenden Bereichen mit einer Bohrung versehen sind.The surge protection element known from DE 44 02 615 A1 has already in has gained considerable importance in practice, namely is made by the applicant and sold under the name FLASHTRAB FLT (see catalog '98 / 99 of Phoenix Contact GmbH & Co., part catalog 7 "TRABTECH surge protection" and the explanations given there about the problem of overvoltages, especially on pages 3 to 5 and pages 12 to 17). In this well-known Surge protection element, each electrode has a connection leg and spark horn running at an acute angle to the connecting leg and form the spark horns of the two - spaced apart - Electrodes together form the air breakdown spark gap. It is between the opposite ends of the connecting legs of the two electrodes one - a sliding discharge triggering ignition aid is provided. In addition, DE 44 02 615 A1 that it is advantageous if the spark horns of the Electrodes in their areas adjacent to the connection legs with a bore are provided.

Das zuvor angesprochene, aus der DE 44 02 615 A1 bekannte Überspannungsschutzelement ist in der praktischen Realisierung so ausgeführt, daß es einerseits eine Stoßstromtragfähigkeit von 100 kA hat, andererseits zur Löschung von Netzfolgeströmen bis in den Bereich von 100 A geeignet ist.The above-mentioned surge protection element known from DE 44 02 615 A1 is carried out in practical implementation so that it has a surge current carrying capacity of 100 kA, on the other hand to delete network follow currents is suitable in the range of 100 A.

Der Erfindung liegt nun die Aufgabe zugrunde, ein Überspannungsschutzelement der gattungsgemäßen Art bereitzustellen, das einfach und kostengünstig aufgebaut ist, auf einfache Weise bei seiner Herstellung an unterschiedliche Anforderungen anpaßbar ist und auch nach mehrfachem Ansprechen noch funktionstüchtig ist.The invention is based on the object of an overvoltage protection element Provide generic type that is simple and inexpensive to build on is easily adaptable to different requirements in its manufacture and is still functional even after multiple responses.

Das erfindungsgemäße Überspannungsschutzelement ist nun dadurch gekennzeichnet, daß die Elektroden über ihre Länge unterschiedliche Querschnitte aufweisen. Dabei können die Elektroden zylindrisch ausgeführt sein und einen kreisförmigen, einen ovalen und/oder einen rechteckigen Querschnitt aufweisen. Unterschiedliche Querschnitte meint nicht nur eine Unterschiedlichkeit in der Geometrie, also kreisförmig, oval oder rechteckig, sondern auch in den Dimensionen; die Elektroden können also über ihre Länge im Querschnitt abgestuft sein, so daß der Bereich, der als Luft-Durchschlag-Funkenstrecke wirksam sein soll, in besonderer Weise örtlich vorgegeben werden kann.The surge protection element according to the invention is now characterized in that that the electrodes have different cross sections over their length. there the electrodes can be cylindrical and a circular one have oval and / or a rectangular cross section. Different cross sections means not only a difference in geometry, i.e. circular, oval or rectangular, but also in dimensions; the electrodes can be graduated in length across its length so that the area known as the air breakdown spark gap should be effective, specified in a special way locally can be.

Für die Funktionsfähigkeit des erfindungsgemäßen Überspannungsschutzelementes ist es von besonderem Vorteil, wenn der Innenraum des die Elektroden aufnehmenden Gehäuses ausgekleidet ist, wobei die Auskleidung vorzugsweise aus POM-Teflon besteht.For the functionality of the surge protection element according to the invention it is particularly advantageous if the interior of the electrode receiving Housing is lined, the lining preferably made of POM-Teflon consists.

Im Stand der Technik, insbesondere auch bei dem Überspannungsschutzelement, das durch die DE 44 02 615 A1 bekannt ist, sind in der Regel die Luft-Durchschlag-Funkenstrecken als ausblasende Funkenstrecken konzipiert. Demgegenüber geht eine weitere Lehre der Erfindung, der besondere Bedeutung zukommt, dahin, daß bei dem erfindungsgemäßen Überspannungsschutzelement das die Elektroden aufnehmende Gehäuse geschlossen und druckfest ausgeführt ist.In the prior art, particularly in the case of the surge protection element, the is known from DE 44 02 615 A1, are usually the air breakdown spark gaps designed as a spark gap. In contrast, one goes further teaching of the invention, which is of particular importance, in that the overvoltage protection element according to the invention that receiving the electrodes Housing is closed and pressure-proof.

Im einzelnen gibt es nun verschiedene Möglichkeiten, das erfindungsgemäße Überspannungsschutzelemente auszugestalten und weiterzubilden. Dazu wird verwiesen einerseits auf die dem Patentanspruch 1 nachgeordneten Patentansprüche, andererseits auf ein besonders bevorzugtes Ausführungsbeispiel, das in Verbindung mit der Zeichnung nachfolgend erläutert wird. In der Zeichnung zeigen

Fig. 1
einen Längsschnitt durch ein besonders bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Überspannungsschutzelements,
Fig. 2
das Überspannungsschutzelement nach Fig. 1, nach dem der das eigentliche Gehäuse aufnehmende Druckzylinder geöffnet worden ist, und
Fig. 3
das Überspannungsschutzelement nach den Fig. 1 und 2 bei geöffnetem Gehäuse.
In particular, there are various options for designing and developing the surge protection element according to the invention. For this purpose, reference is made, on the one hand, to the claims subordinate to claim 1, and, on the other hand, to a particularly preferred exemplary embodiment, which is explained below in conjunction with the drawing. Show in the drawing
Fig. 1
2 shows a longitudinal section through a particularly preferred exemplary embodiment of an overvoltage protection element according to the invention,
Fig. 2
1, after which the pressure cylinder receiving the actual housing has been opened, and
Fig. 3
the overvoltage protection element according to FIGS. 1 and 2 with the housing open.

Das erfindungsgemäße, in den Figuren dargestellte Überspannungsschutzelement dient zur Ableitung von transienten Überspannungen und zur Begrenzung von Stoßströmen, insbesondere von Blitzstoßströmen, sowie zur Löschung von Netzfolgeströmen; es können Blitzstoßströme bis zu 100 kA abgeleitet und Netzfolgeströme von typisch 3 bis 4 kA, maximal von 25 kA oder sogar von 50 kA, gelöscht werden.The surge protection element according to the invention, shown in the figures serves to derive transient overvoltages and to limit surge currents, in particular of lightning impulse currents, as well as for the deletion of network follow currents; lightning impulse currents up to 100 kA can be derived and line follow currents from typically 3 to 4 kA, maximum of 25 kA or even 50 kA, can be deleted.

Das erfindungsgemäße Überspannungsschutzelement besteht in seinem wesentlichen Aufbau aus zwei jeweils einen Stromanschluß 1, 2 aufweisende Elektroden 3, 4, einer zwischen den Elektroden 3, 4 wirksamen Luft-Durchschlag-Funkenstrecke 5 und einem die Elektroden 3, 4 aufnehmenden Gehäuse 6.The surge protection element according to the invention consists in its essential Construction from two electrodes 3, 4, each having a current connection 1, 2 between the electrodes 3, 4 effective air breakdown spark gap 5 and one the electrodes 3, 4 housing 6.

Wie die Figuren zeigen, sind die Elektroden 3, 4 parallel zueinander angeordnet. Die Elektroden 3, 4 sind nebeneinander angeordnet; ihre Längsachsen fallen also auseinander. Im dargestellten Ausführungsbeispiel sind die Elektroden 3, 4 zylindrisch ausgeführt; sie weisen einen kreisförmigen Querschnitt auf.As the figures show, the electrodes 3, 4 are arranged parallel to one another. The Electrodes 3, 4 are arranged side by side; their longitudinal axes therefore fall apart. In the illustrated embodiment, the electrodes 3, 4 are cylindrical; they have a circular cross section.

Wie die Fig. 1 und 3 zeigen, gilt für das dargestellte Ausführungsbeispiel eines erfindungsgemäßen Überspannungsschutzelements, daß die Elektroden 3, 4 über ihre Länge unterschiedliche Querschnitte aufweisen; die Elektroden 3, 4 haben also Elektrodenabschnitte 3a, 3b, 3c, 3d und 3e bzw. 4a, 4b, 4c, 4d und 4e. Dabei haben die Elektrodenabschnitte 3c und 4c den größten Durchmesser. Zwischen den Elektrodenabschnitten 3c und 4c besteht somit der geringste Abstand, so daß zwischen den Elektrodenabschnitten 3c und 4c die Luft-Durchschlag-Funkenstrecke 5 ausgebildet ist.1 and 3 show, applies to the illustrated embodiment of an inventive Surge protection element that the electrodes 3, 4 on their Length have different cross sections; the electrodes 3, 4 thus have electrode sections 3a, 3b, 3c, 3d and 3e or 4a, 4b, 4c, 4d and 4e. They have Electrode sections 3c and 4c the largest diameter. Between the electrode sections 3c and 4c is therefore the smallest distance, so that between the Electrode sections 3c and 4c formed the air breakdown spark gap 5 is.

Bei einem erfindungsgemäßen Überspannungsschutzelement könnten die Stromanschlüsse beider Elektroden auf der gleichen Seite liegen. Im dargestellten Ausführungsbeispiel liegen jedoch die Stromanschlüsse 1 bzw. 2 beider Elektroden 3 bzw. 4 auf gegenüberliegenden Seiten. Sie verlaufen, wie den Figuren ohne weiteres entnommen werden kann, parallel zueinander. Denkbar sind jedoch auch Ausführungsbeispiele, bei denen die Stromanschlüsse beider Elektroden unter einem spitzen Winkel zueinander verlaufen.In the case of an overvoltage protection element according to the invention, the power connections could both electrodes are on the same side. In the illustrated embodiment however, the power connections 1 and 2 of both electrodes 3 and 4 are located on opposite sides. They run as is easily taken from the figures can be parallel to each other. However, exemplary embodiments are also conceivable, where the power connections of both electrodes are at an acute angle to each other.

Für die Funktionstüchtigkeit des erfindungsgemäßen Überpannungsschutzelements ist es von besonderem Vorteil, wenn, was die Figuren nicht zeigen, der Innenraum des die Elektroden 3, 4 aufnehmenden Gehäuses 6 ausgekleidet ist, wobei die Auskleidung vorzugsweise aus POM-Teflon besteht.For the functionality of the surge protection element according to the invention it is particularly advantageous if what the figures do not show, the interior of the the electrodes 3, 4 housing 6 is lined, the liner preferably consists of POM-Teflon.

Das in den Figuren dargestellte Ausführungsbeispiel eines erfindungsgemäßen Überspannungsschutzelements ist insoweit ein besonders vorteilhaftes, als das die Elektroden 3, 4 aufnehmende Gehäuse 6 geschlossen und druckfest ausgeführt ist. Im einzelnen besteht das die Elektroden 3, 4 aufnehmende Gehäuse 6 aus einem zylindrischen Gehäusemantel 7 und zwei jeweils an einem Ende des Gehäusemantels 7 vorgesehenen Gehäuseflanschen 8, 9.The embodiment of an overvoltage protection element according to the invention shown in the figures is a particularly advantageous one in that the electrodes 3, 4 receiving housing 6 is closed and pressure-resistant. In detail consists of the housing 3, 4 receiving the housing 6 from a cylindrical Housing shell 7 and two each provided at one end of the housing shell 7 Housing flanges 8, 9.

Im dargestellten Ausführungsbeispiel ist bei dem zuvor geschilderten Aufbau des die Elektroden 3, 4 aufnehmenden Gehäuses 6 die Druckfestigkeit des Gehäuses 6 in Verbindung mit einem äußeren Druckzylinder 10 realisiert. Im einzelnen gilt, daß der Druckzylinder 10 eine Druckhülse 11 aufweist, die Druckhülse 11 auf der einen Seite mit einem Außengewinde 12 und auf der anderen Seite mit einem nach innen ragenden Flansch 13 versehen ist, eine Überwurfmutter 14 vorgesehen ist und die Überwurfinutter 14 auf die Druckhülse 11 aufgeschraubt ist.In the illustrated embodiment, in the previously described construction of the Electrodes 3, 4 housing 6, the compressive strength of the housing 6 in connection realized with an outer pressure cylinder 10. In particular, the Printing cylinder 10 has a printing sleeve 11, the printing sleeve 11 on one side with an external thread 12 and on the other side with an inwardly projecting Flange 13 is provided, a union nut 14 is provided and the union nut 14 is screwed onto the pressure sleeve 11.

Die Herstellung des erfindungsgemäßen Überspannungsschutzelements, das heißt die Herstellung der Einzelteile und der Zusammenbau dieser Einzelteile, ist ausgesprochen einfach und damit kostengünstig. Bei den Stromanschlüssen 1, 2, den Elektroden 3, 4, den Einzelteilen des Gehäuses 6, nämlich dem Gehäusemantel 7 und den Gehäuseflanschen 8, 9, sowie den Einzelteilen des äußeren Druckzylinders 10, also der Druckhülse 11 und der Überwurfmutter 14, handelt es sich um rotationssymmetrische Teile, die entweder ohne weiteres zur Verfügung stehen oder als Drehteile auf modernen Werkzeugmaschinen serienmäßig hergestellt werden können.The manufacture of the surge protection element according to the invention, that is Manufacture of the individual parts and the assembly of these individual parts is pronounced simple and therefore inexpensive. At the power connections 1, 2, the electrodes 3, 4, the individual parts of the housing 6, namely the housing jacket 7 and the Housing flanges 8, 9, and the individual parts of the outer pressure cylinder 10, that is the pressure sleeve 11 and the union nut 14 are rotationally symmetrical Parts that are either readily available or as turned parts modern machine tools can be mass-produced.

Wie insbesondere die Fig. 1 zeigt, ist jeder Gehäuseflansch 8, 9 sowohl mit einer Durchgangsbohrung 15, 16, als auch mit einer Sackbohrung 17, 18 versehen. Die so ausgebildeten Gehäuseflansche 8, 9 erlauben also sowohl das Hindurchführen der Stromanschlüsse 1, 2, als auch - auf der jeweils anderen Seite - eine endseitige Lagerung der Elektroden 3, 4, nämlich im Bereich der Elektrodenabschnitte 3e, 4e. As shown in FIG. 1 in particular, each housing flange 8, 9 is both with a Through hole 15, 16, as well as provided with a blind hole 17, 18. The so trained housing flanges 8, 9 thus allow both the passage of Power connections 1, 2, and - on the other side - an end bearing of the electrodes 3, 4, namely in the area of the electrode sections 3e, 4e.

Für das dargestellte, besonders vorteilhafte Ausführungsbeispiel eines erfindungsgemäßen Überspannungsschutzelementes gilt, daß die Gehäuseflansche 8, 9 abdichtend gegen den zylindrischen Gehäusemantel 7 verspannt werden können, und zwar mit Hilfe des äußeren Druckzylinders 10, nämlich dadurch, daß die Überwurfmutter 14 auf die Druckhülse 11 aufgeschraubt wird.For the illustrated, particularly advantageous embodiment of an inventive Overvoltage protection element applies that the housing flanges 8, 9 sealing can be clamped against the cylindrical housing shell 7, with Help of the outer pressure cylinder 10, namely in that the union nut 14th is screwed onto the pressure sleeve 11.

Bei dem erfindungsgemäßen Überspannungsschutzelement kann das die Elektroden 3, 4 aufnehmende Gehäuse 6 als Löschgas Luft aufweisen; es kann jedoch auch mit einem anderen bekannten Löschgas versehen sein, zum Beispiel mit SF6. Im übrigen kann das Löschgas in dem die Elektroden 3, 4 aufnehmenden Gehäuse 6 unter atmosphärischen Druck stehen, denkbar ist jedoch auch, und zwar bei dem beschriebenen Ausführungsbeispiel, bei dem das die Elektroden 3, 4 aufnehmende Gehäuse 6 druckdicht und druckfest ausgeführt ist, daß das Löschgas unter einem vom atmosphärischen Druck abweichenden Druck steht.In the overvoltage protection element according to the invention, the housing 6 receiving the electrodes 3, 4 can have air as the extinguishing gas; however, it can also be provided with another known extinguishing gas, for example SF 6 . Otherwise, the extinguishing gas in the electrodes 3, 4 receiving housing 6 are at atmospheric pressure, but is also conceivable, in the embodiment described, in which the electrodes 3, 4 receiving housing 6 is pressure-tight and pressure-resistant that the extinguishing gas is at a pressure deviating from the atmospheric pressure.

Claims (19)

  1. Overvoltage protection element for diverting transient overvoltages comprising: two electrodes (3, 4), each of which has a current terminal (1, 2), an air breakdown spark gap (5) between the electrodes (3, 4) and a housing (6) holding the electrodes (3, 4); characterized in that the electrodes (3, 4) have cross sections of different shapes along their length.
  2. Overvoltage protection element according to claim 1, characterized in that the electrode sections (3c, 4c) having the greatest diameter lie opposite one another.
  3. Overvoltage protection element according to claim 1 or 2, characterized in that the electrodes (3, 4) are cylindrical.
  4. Overvoltage protection element according to claim 1 or 2, characterized in that the electrodes (3, 4) have a circular cross section.
  5. Overvoltage protection element according to claim 1 or 2, characterized in that the electrodes have an oval cross section.
  6. Overvoltage protection element according to claim 1 or 2, characterized in that the electrodes have a rectangular cross section.
  7. Overvoltage protection element according to claim 6, characterized in that the electrodes are rounded in the area of the edges.
  8. Overvoltage protection element according to any one of claims 1 to 7, characterized in that the current terminals of the two electrodes lie on the same side.
  9. Overvoltage protection element according to any one of claims 1 to 7, characterized in that the current terminals (1, 2) of the two electrodes (3, 4) lie on opposite sides of the housing (6).
  10. Overvoltage protection element according to any one of claims 1 to 9, characterized in that the current terminals (1, 2) of the two electrodes (3, 4) run parallel to one another.
  11. Overvoltage protection element according to any one of claims 1 to 9, characterized in that the current terminals of the two electrodes run at an acute angle to one another.
  12. Overvoltage protection element according to any one of claims 1 to 11, characterized in that the interior of the housing (6) holding the electrodes (3, 4) is lined.
  13. Overvoltage protection element according to claim 12, characterized in that the lining is made of POM polytetrafluoroethylene.
  14. Overvoltage protection element according to any one of claims 1 to 13, characterized in that an outer pressure cylinder (10) encloses the housing (6).
  15. Overvoltage protection element according to claim 14, characterized in that the pressure cylinder (10) has a pressure sleeve (11), the pressure sleeve (11) is provided with an outer thread (12) on one side and with a flange (13) that projects inwardly on another side, and that a union nut (14) is provided and the union nut (14) is screwed onto the pressure sleeve (11).
  16. Overvoltage protection element according to any one of claims 1 to 15, characterized in that the housing (6) holding the electrodes (3, 4) contains air as an extinguishing gas.
  17. Overvoltage protection element according to any one of claims 1 to 15, characterized in that the housing (6) holding the electrodes (3, 4) contains SF6 as an extinguishing gas.
  18. Overvoltage protection element according to claim 16 or 17, characterized in that the housing contains an extinguishing gas under atmospheric pressure.
  19. Overvoltage protection element according to claim 16 or 17, characterized in that the housing contains an extinguishing gas under a pressure that differs from atmospheric pressure.
EP99107875A 1998-04-27 1999-04-21 Overvoltage arrester element Expired - Lifetime EP0954073B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01116334A EP1143585B2 (en) 1998-04-27 1999-04-21 Surge arrester device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19818674 1998-04-27
DE19818674A DE19818674B4 (en) 1998-04-27 1998-04-27 Snubber

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP01116334A Division EP1143585B2 (en) 1998-04-27 1999-04-21 Surge arrester device
EP01116334.2 Division-Into 2001-07-05

Publications (2)

Publication Number Publication Date
EP0954073A1 EP0954073A1 (en) 1999-11-03
EP0954073B1 true EP0954073B1 (en) 2002-07-03

Family

ID=7865872

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EP01116334A Expired - Lifetime EP1143585B2 (en) 1998-04-27 1999-04-21 Surge arrester device
EP99107875A Expired - Lifetime EP0954073B1 (en) 1998-04-27 1999-04-21 Overvoltage arrester element

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01116334A Expired - Lifetime EP1143585B2 (en) 1998-04-27 1999-04-21 Surge arrester device

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US (2) US6392862B1 (en)
EP (2) EP1143585B2 (en)
CN (1) CN1257586C (en)
AT (2) ATE266903T1 (en)
DE (3) DE19818674B4 (en)
ES (2) ES2180239T3 (en)

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DE10231431B4 (en) * 2002-07-11 2014-03-20 Dehn + Söhne Gmbh + Co. Kg Encapsulated, flameproof surge arrester with a spark gap
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DE102018133389A1 (en) * 2018-12-21 2020-06-25 Phoenix Contact Gmbh & Co. Kg Surge arresters

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Also Published As

Publication number Publication date
DE19818674A1 (en) 1999-10-28
EP1143585B1 (en) 2004-05-12
EP1143585A3 (en) 2002-11-06
US6392862B1 (en) 2002-05-21
ATE220252T1 (en) 2002-07-15
ATE266903T1 (en) 2004-05-15
EP1143585B2 (en) 2008-11-05
ES2180239T3 (en) 2003-02-01
ES2217060T5 (en) 2009-04-16
DE59909490D1 (en) 2004-06-17
CN1257586C (en) 2006-05-24
EP1143585A2 (en) 2001-10-10
ES2217060T3 (en) 2004-11-01
EP0954073A1 (en) 1999-11-03
DE19818674B4 (en) 2004-04-29
US20020024789A1 (en) 2002-02-28
CN1241054A (en) 2000-01-12
US6529360B2 (en) 2003-03-04
DE59901894D1 (en) 2002-08-08

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