Dehn + Söhne Gmbh + Co Kg

Dehn + Soehne Gmbh + Co. Kg

Dehn Se + Co Kg

Michael Waffler

Bernhard Krauss

Stephan Hierl

Peter Zahlmann

Uwe Strangfeld

Arnd Ehrhardt

Georg Wittmann

Stefanie Schreiter

Stefan Hierl

Edmund Zäuner

Ralph Brocke

Richard Daum

Jens Ehrler

Sascha Ludewig

Sebastian Haas

Arnd Erhardt

Florian Gaeck

Raimund Koenig

Steffen Beier

Martin Strobl

Edmund Zaeuner

Juliane Klose

Dietmar DÜRR

Werner Riel

An overvoltage protection device has a plurality of overvoltage arresters and a disconnecting apparatus. For each of the overvoltage arresters a blocking element is present, each of which is arranged so as to block the path of movement of a mechanically preloaded wedge slide having a wedge bevel. A rocker lever arrangement has first lever arms corresponding to the number of wedge slides and at least one second lever arm for blocking or releasing a displacement element, wherein ends of the first lever arms each have a surface for contacting the respective wedge bevel of the wedge slides in such a way that, when the respective path of movement is released, at least one of the wedge slides lifts the corresponding first lever arm with its wedge bevel, as a result of which the second lever arm releases the displacement element.

Surge protection device having a plurality of surge arresters and, in particular thermal, isolating apparatus which is respectively associated with them

The invention relates to an arrangement for overload protection for overvoltage protection equipment that has at least one voltage-limiting element and at least one voltage-switching element, and optionally with a back-up fuse, wherein the voltage-limiting element is in the form of a varistor and the voltage-switching element is in the form of a spark gap and these elements are connected in series. According to the invention, to protect against inadmissible pulsed currents, the voltage-limiting element in the series circuit has a monitoring spark gap, forming a bypass, connected in parallel with it. Furthermore, a monitoring device, e.g. a thermal monitoring device, is provided that bypasses both the monitoring spark gap and the voltage-switching element in the event of ageing effects, inadmissibly high mains voltages and/or low-energy, periodic, high-frequency overvoltages.

Arrangement for overload protection for overvoltage protection equipment

The invention relates to a spark gap arrangement comprising two preferably flat, opposing electrodes () that are held apart in a housing body (), said electrodes forming an arc combustion chamber, and comprising a gas-cooling and pressure-compensating chamber that is connected to the arc combustion chamber. According to the invention, the housing body () is formed from two half-shells (), each of which has first recesses that lie opposite each other in one plane for electrode connecting limbs (), said limbs being connected to a connecting terminal () on the outside of the housing body. Each of the half-shells () has a first space for receiving an insulating material support () for the electrodes () and a second space for receiving a cooling block (), which has channels, with a high heat capacity. Furthermore, a U-shaped clamp () that is connected to the half-shells in a mechanical and pressure-resistant manner is provided at least in the receiving region of the cooling block () such that said clamp encompasses the half-shells () on the outside.

Spark gap arrangement comprising two preferably flat, opposing electrodes that are held apart in a housing body

The invention relates to a spark gap comprising a number of series-connected individual spark gaps which are placed in a stack arrangement, which are spaced apart from each other by insulating material discs and are provided with a spring contact, the individual spark gaps including ring-shaped or disc-shaped electrodes, and further comprising control elements for influencing the voltage distribution over the stack arrangement. According to the invention the ring-shaped or disc-shaped electrodes required to form one of the respective individual spark gaps are each inserted into an insulating body and held by same in a centered manner. The respective insulating material discs are located between and fixed by the insulating bodies. A recess is provided inside the insulating body to receive and center the electrodes, whose shape is complementary relative to the contour of the respective electrode, wherein the recess comprises on the inner circumference at least partially elastic, resilient centering projections or centering noses.

Spark gap having a plurality of series-connected individual spark gaps, which are located in a stack arrangement

The invention relates to an arrangement for igniting spark gaps with a trigger electrode T which is located on or in one of the main electrodes Hand is insulated with respect to this main electrode H, wherein the trigger electrode T is electrically connected to one of the other main electrodes Hby means of at least one voltage-switching or voltage-monitoring element and there is an air gap between the trigger electrode T and the other main electrode H. According to the invention, the trigger electrode T forms a sandwich structure with an insulation section I and a layer which is composed of a material M with a lower conductivity than the material of one of the main electrodes, wherein this sandwich structure represents a layered dielectric with the order of a first partial capacitor Cwith the dielectric of the insulation section I and a second partial capacitor Cwith the material M as dielectric.

Arrangement for igniting spark gaps

The invention relates to a plug-in combination of appliances for protecting against overvoltages, said combination of appliances comprising: a socket-type lower part and at least one plug-in module, which can both receive overvoltage protection elements; contact elements and contact counter elements that are respectively arranged in the lower part and in the plug-in module; and complementary guide rails or guide grooves for inserting or pushing-on and fixing the respective plug-in module. According to the invention, functionally separated, mechanical catch or snap-in elements act between the respective plug-in module and the socket-type lower part independently of the forces which hold together the contact elements and the contact counter elements in a positively fixed and/or non-positively fixed manner when the plug-in module is in use. The catch or snap-in function can be cancelled without any mechanical auxiliary means when the respective plug-in module is to be replaced.

Plug-in combination of appliances for protecting against overvoltages

A compact arrangement for multipole, surge-protected surge arresters, including internally wired, encapsulated series gaps arranged essentially in parallel in a housing. The series gaps have opposite-lying, projecting contact surfaces connected to outer terminals and inner contact bars or bridges. An electronic control or trigger circuit is located on a wiring support. The housing includes dividing walls and has a trough shape, the resulting housing chambers accommodating the gaps and terminals. An insulating plate with openings into which spring contact elements are introduced is provided on the housing trough which opens upwards. Located above the insulating plate is the wiring. The spring contact elements create the electrical connection between contact points on the underside of the wiring support and the cover of one of the series gaps, respectively. Further, an encapsulated surge protector includes a series gap arrangement with two metallic main electrodes lying coaxially to each other and at least partially overlapping each other and having connections in opposite directions. The main electrodes form an arc chamber in conjunction with at least one insulation part. At least one of the main electrodes has an inner expansion chamber and a trigger electrode extending preferably radially or axially rotationally symmetrically is provided at least in the area of an outer insulation part.

Compact arrangement for multipole, surge-proof surge arresters and encapsulated surge arrester for the same

A spark-gap arrangement encapsulated in a pressure-proof housing, for diverting harmful disturbances due to overvoltage, including at least two electrodes disposed substantially opposite one another in a housing that is conductive or provided with a conductive coating, between which a discharge space is formed and which are insulated from the housing. In accordance with the spark-gap arrangement a trigger voltage to form a subsidiary spark gap in the discharge space can be applied directly by the conductive housing, so that by the subsidiary spark gap the main spark gap between the main electrodes can be ignited.

Pressure-resistant encapsulated air-gap arrangement for the draining off of damaging perturbances due to overvoltages

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Neumarkt, Germany

Michael Waffler