Dehn + Söhne Gmbh + Co Kg

Dehn Se

Dehn Se + Co Kg

Other

Edmund Zäuner

Arnd Ehrhardt

Georg Wittmann

Helmut Hirschmann

Ralph Brocke

Sascha Ludewig

Peter Zahlmann

Stephan Hierl

Bernhard Krauss

Stefanie Schreiter

Richard Daum

Michael Waffler

Jens Ehrler

Sebastian Haas

Florian Gaeck

Stefan Hierl

Stefan Dietweger

Arnd Erhardt

Martin Strobl

Thomas Gottschalk

Manuel Scharf

Christian Lang

Florian GÄCK

Bernd Leibig

Raimund KÖNIG

Wilhelm Hohenwaldt

The invention relates to a surge protection apparatus () for protecting an electrical installation against transient overvoltages, having a voltage-limiting protection component () and additionally a voltage-switching protection component (). The voltage-limiting protection component () and the voltage-switching protection component () are connected in series. The voltage-limiting protection component () is dimensioned such that the voltage-limiting protection component () satisfies the condition U=U/K, where Uis the rated voltage of the voltage-limiting protection component (), Uis a nominal voltage applied to the voltage-limiting protection component (), and Kis a setting parameter the value of which is at least 2.

Overvoltage protection device and use of an overvoltage protection device

A surge protection device has at least one disconnecting device (), at least one actuating device (), an indicating device (), and a shaft () mounted for rotation between at least a first position and a second position, the at least one actuating device () being variable between a first position and a second position. The shaft (), the indicating device () and the actuating device () are formed in such a way and the actuating device (), when in the first position, is fastened to the at least one disconnecting device () so as to be preloaded such that when the disconnecting device () is triggered, the actuating device () is released and triggers the indicating device () by means of the shaft (). Further, a modular surge protection system is described.

Surge protection device and modular surge protection system

The invention relates to a disconnecting device for a surge arrester which is accommodated by a support body, and wherein plug contacts which are connected to at least one arrester element of the surge arrester extend from the support body. The invention further comprises a switching tongue which is connected at a first end to the arrester element via a thermal separating point and with a second end to one of the plug contacts. Furthermore, a spring-preloaded insulating disconnecting bracket which is pivotably mounted on the support body is provided, the spring preload acting on the thermal separating point via the switching tongue. According to the invention, the switching tongue is configured as a straight-surface, elongated, metallic, resiliently elastic disconnecting strip having a rectangular cross-section.

Disconnecting device for a surge arrester

The invention relates to an arrangement for non-reversible detection and display of electrical overcurrents or current limit values by means of a pre-finished conductor. The conductor according to the invention has at least two conductor sections, spaced apart from each other and extending parallel to each other, which are designed for current to flow through in the same direction. At least one of the parallel conductor sections has a protrusion, a nose, or similar blocking element, which limits the path of movement of a mechanical display or switching element, such that the electromagnetic force acting on the parallel conductor sections during the flow of current transitions the blocking element into a release position in respect of the path of movement of the mechanical display or switching element. Such an arrangement can be used particularly advantageously as a prior damage indicator in surge arresters.

Arrangement for non-reversible detection and display of electrical overcurrents or current limit values by means of a pre-finished conductor

The invention relates to an overvoltage protection arrangement consisting of a horn spark gap accommodated in an insulating housing () having a deion chamber. A trigger electrode is located in the ignition area of the horn spark gap. A varistor is also present, electrically connected in series to the horn spark gap. According to the invention, a first and a second disconnection apparatus are formed in the housing, wherein the first disconnection apparatus () is in heat-conducting connection with the varistor and, when a limit temperature is reached or exceeded, releases a spring-loaded slide () which interrupts the series connection between varistor and horn spark gap. Furthermore, the second disconnection apparatus () comprises a fusible conductor which is located inside the deion chamber, for example, and can be exposed there to an arc, wherein the fusible conductor holds a spring-loaded disconnector element () in a first position and releases this disconnector element () when fused as a result of the effects of the arc in such a manner that the disconnector element () adopts a second position, wherein an electrical connection to the trigger electrode is interrupted when the second position is reached. A three-pointed, rotatably mounted star or a circular disc with lugs or prongs is formed in the housing such that a first star point () is carried along by the slide () as it moves to interrupt the series connection. In the same way, a second star point () is carried, as the disconnector element () moves, from the first to the second position, wherein each movement of the star results in a rotation of the star around its axis of rotation () with the consequence that a third point of the star () releases a spring-loaded pivoting lever () which operates a remote signalling contact () and/or a visual fault status display ().

Overvoltage protection arrangement consisting of a horn spark gap accommodated in an insulating housing

The invention relates to an overvoltage protection device with at least one overvoltage protection unit, consisting of a socket part and a plug part which can be connected to the socket part and which receives means for protecting against an overvoltage, wherein insulated electric conductors can be introduced into the socket part, said electric conductors being contacted using vampire or cutting clamps, thereby penetrating the conductor insulation, and with contact surfaces which can be found on the socket part and which correspond to mating contact surfaces on the base of the plug part. According to the invention, the socket part is made of multiple parts consisting of a base part and a lever part. The base part is designed as a marble panel and has multiple parallel grooves for inserting and receiving the insulated electric conductors. On one face of the base part, hook-shaped protrusions are provided parallel to the grooves. The lever part has axle stubs, which engage into the hook-shaped protrusions, on one lever end. The lever part has at least one cutting clamp on the lever part lower face facing the marble panel and in the vicinity of the axle stubs, wherein the cutting clamp leads to a plug contact which can be found in the lever part and which can be accessed from the upper face of the lever part in order to receive the plug part.

Overvoltage protection device with at least one overvoltage protection unit, consisting of a socket part and a plug part which can be connected to the socket part

The invention relates to a surge protection device, comprising at least one surge arrester and one thermally trippable switching device connected in series with the surge arrester, wherein the above-mentioned means form a structural unit and the thermal tripping means is arranged in the region in which heating of the surge arrester is to be expected on overloading thereof. The thermal tripping means is in the form of a stop part through which there is no operating or surge current flowing and which effects or enables unlatching of the switching device in the case of thermal overload. Furthermore, the stop part is coupled thermally and mechanically to a surface side of the surge arrester and blocks the movement path of a mechanically prestressed unlatching slide. In accordance with the invention, a contact platelet is inserted in the unlatching slide, said contact platelet producing an electrical connection between elements of the switching device and, with unlatching, the contact platelet is subjected to a shifting movement resulting in an interruption to the series circuit and movement of the unlatching slide into the space previously assumed by the contact platelet, wherein at least the section of that region of the unlatching slide which separates the elements of the switching device is insulating.

Surge protection device, comprising at least one surge arrester and one thermally trippable switching device connected in series with the surge arrester

The invention relates to a surge protection device, comprising at least one surge arrester and one short-circuit switching device which is connected in parallel with the surge arrester, can be thermally tripped and is spring-pretensioned, wherein the abovementioned means form one physical unit. The thermal tripping means is arranged in the region where heating of the surge arrester is expected when it is overloaded, and operating or surge current does not flow through said thermal tripping means. The thermal tripping means is in the form of a stop part which releases an unlocking slide of the switching device in the event of thermal overload. The switching device has two opposite contact pieces, wherein at least one of the contacts is of moveable design and is under spring pretension in the closing direction of the switching device. The opening state of the switching device is maintained by the unlocking slide, which is released by the thermal tripping means to close the switching device.

Surge protection device, comprising at least one surge arrester and one short-circuit switching device which is connected in parallel with the surge arrester, can be thermally tripped and is spring-pretensioned

The invention relates to an arrangement for forming a thermal isolation point, consisting of an isolation strip to which a prestressing force can be applied, an electrical means which produces thermal energy and has a contact surface, in particular in the form of an overvoltage protection element or a component of such an element, as well as an integral connection means, which changes when heated in a defined manner in the aggregate state, in particular a solder. According to the invention, an adapter part is provided between the isolation strip and the contact surface of the electrical means, wherein the adapter part can on the one hand be connected to the contact surface in a purely interlocking and/or force-fitting manner, and on the other hand is connected in a manner which can provide thermal isolation integrally to the isolation strip.

Arrangement for forming a thermal isolation point

The invention relates to an overvoltage protection device, comprising at least one surge arrester and one switchgear assembly, which is connected in series to the surge arrester and which can be triggered thermally, wherein the aforementioned components form a structural unit, and the thermal tripping means is arranged in the area of the expected heating up of the surge arrester when overloaded. According to the invention, the thermal tripping unit is configured as a stop element through which operating current or surge current does not flow. In the event of thermal overload, the stop element opens a releasing device of the switchgear assembly, wherein said switchgear assembly has an increased self-extinguishing capacity.

Overvoltage protection device having at least one surge arrester

The invention relates to an overvoltage protection device having one or more parallel-connected voltage-limiting elements which are located in one physical unit, such as varistors, diodes or means of this type configured in the form of a disc, comprising a shell apparatus in order to electrically disconnect the overvoltage-limiting elements when they are thermally overloaded, and means for indication and/or signalling of the fault state which then occurs, wherein the switching apparatus is connected via a means which can be released thermally, such as adhesive or a solder, to a connecting contact of the at least one overvoltage-limiting element, and/or to an external terminal contact or plug contact. According to the invention, the switching apparatus is in the form of a solid U-shaped switching fork, the fork tines of which run essentially parallel to the side surfaces of the overvoltage-limiting element, holding the latter in the space between the tines. At least one of the fork tines rests on the at least one connecting contact and is fixed there via the means which can be released thermally wherein, when disconnection occurs, the disconnection slide is moved with the switching fork being driven and, in the process, the connection point between the fork tines and the connecting contact represents a fulcrum for the switching fork movement.

Overvoltage protection device having one or more parallel-connected overvoltage-limiting elements located in one physical unit

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.

Growing community of inventors

Berching/Pollanten, Germany

Edmund Zäuner