Dehn Se

Dehn Se + Co Kg

Dehn + Söhne Gmbh + Co Kg

Other

Ralph Brocke

Peter Zahlmann

Edmund Zäuner

Georg Wittmann

Franz Schork

Helmut Hirschmann

Jens Ehrler

Arnd Ehrhardt

Stephan Hierl

Bernhard Krauss

Michael Waffler

Ottmar Beierl

Thomas Böhm

Sascha Ludewig

Sebastian Haas

Peter Igl

Florian Gaeck

Stefan Hierl

Martin Strobl

Patrick Spangler

Dominik Donauer

Johannes Spies

Michael Moroshek

Claudia Rother

Klaus-Peter Müller

Helmut SCHÖLL

Andre Wechsler

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

The invention relates to an overvoltage protection arrangement comprising a horn spark gap located in a housing, with a chamber for arc quenching, wherein a trigger electrode is located in the ignition region of the horn spark gap, wherein a disconnecting element is provided that interrupts a connection between a trigger circuit and the trigger electrode, and thus disconnects the trigger electrode, wherein the disconnecting element is tripped or controlled by an evaluation unit that is subject to and reacts to the loading of a power follow-on current.

Overvoltage protection arrangement with a horn spark gap, located in a housing, with a chamber for arc quenching

The invention relates to a method for evaluating the state and the quality of low-voltage networks, in the branched system of which there is a plurality of connected loads, by determining network measurement data by means of power quality measuring and testing devices and transferring the network measurement data, by means of a standard interface, to a control system or in retrievable form to a server. According to the invention, the overvoltage protection devices, which are or can be used in the low-voltage system and have a self-diagnosis unit and an existing wireless or wired standard interface for data transfer, are able to determine network measurement data by means of integrated or adapted power quality measuring and testing devices.

Method for evaluating the state and the quality of low-voltage networks

The invention relates to a circuit arrangement for combined protection of a load from temporary and transient overvoltages with emergency operation of the load in the presence of a temporary overvoltage and with integrated follow current limitation, wherein a first surge arrester, in particular a spark gap or a varistor, is provided between network-side input terminals and a second surge arrester, in particular a varistor, is provided between load-side output terminals for follow current limitation. According to the invention, at least one controlled semiconductor switch is provided in each case in the series branch between the input terminal and the output terminal and in the output-side parallel branch, wherein a mechanical switch and a series capacitance are connected in parallel with the semiconductor switch in the series branch. Furthermore, the semiconductor switch in the parallel branch is part of a series circuit comprising a parallel circuit comprising a second surge arrester and a parallel capacitance. A series inductance is provided in the series branch between the input terminal and the parallel circuit comprising the series capacitance, the controlled semiconductor switch and the mechanical switch. A microcontroller for controlling the semiconductor switches is also present, wherein the microcontroller is connected to a current detector in the series branch.

Circuit arrangement for combined protection of a load from temporary and transient overvoltages

The invention relates to an arrangement for overload protection of overvoltage protection devices, consisting of at least one type II surge arrester with or without a thermal disconnecting device that responds in the event of an of overload. According to the invention, a switching unit free of movable contacts is connected in series with the at least one surge arrester and structurally combined therewith, which switching unit has at least two fixed narrow spaced switching contacts, wherein the spacing of the switching contacts is specified in such a way that in the event of every surge current or discharge process, the switching device changes into a quasi-closed state because of the arc formed; whereas in the idle state, the voltage of the connected mains drops at the switching device, with the surge arrester arranged in series remaining free of leakage current.

Arrangement for overload protection for overvoltage protection equipment

The invention relates to an overvoltage protection device with monitoring and communication functions, in particular for the information and process industries, having at least one surge arrester with a self-diagnostics unit and a wireless and/or wired standard interface for data transmission. According to the invention, an additional module is provided to detect the behaviour and/or the properties of a connected electrical energy source, wherein a bidirectional exchange of data and commands to and between a higher-level control system and among multiple overvoltage protection devices takes place and parametrisation of lower-level terminals to be protected can be realised via the standard interface.

Overvoltage protection device with monitoring and communication functions

The invention relates to a method for designing a lightning protection system for the exterior lightning protection of buildings and systems and to an insulated lightning arrester device related thereto. The lightning arrester of the lightning protection system is at least partly designed as an insulated electric conductor with a conductive layer or casing on the insulation, and conductive structures can be found in the respective building or the respective system, wherein the structures are potentially exposed to inductions which occur in the event of a lightning current to be arrested, and correspondingly the conductive layer on the insulated conductor together with the respective conductive structure forms a secondary loop.

Suppressing circulating currents in conductive structures in buildings

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 a circuit assembly for protecting a unit to be operated from a supply network against overvoltage, comprising an input having a first and a second input connection, which are connected to the supply network, an output having a first and a second output connection, to which the unit to be protected can be connected, and a protection circuit, which is provided between the first and the second input connections in order to limit the voltage present at the first and the second input connections. According to the invention, the protection circuit has a power semiconductor, in particular an IGBT, wherein a series circuit consisting of a diac, i.e., a bidirectional electrode, and a Zener element is connected between the collector and the gate of the power semiconductor, wherein the sum of the Zener voltage and the diac voltage results in a clamping voltage for the power semiconductor, which lies above the voltage of the supply network and defines the protection level.

Circuit assembly for protecting a unit to be operated from a supply network against overvoltage

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

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Ilmenau/Oberpörlitz, Germany

Ralph Brocke