Dehn + Söhne Gmbh + Co Kg

Dehn Se

Dehn Se + Co Kg

Dehn + Soehne Gmbh + Co. Kg

Peter Zahlmann

Arnd Ehrhardt

Georg Wittmann

Ralph Brocke

Bernhard Krauss

Michael Waffler

Edmund Zäuner

Peter Hasse

Thomas Böhm

Jens Ehrler

Klaus Bühler

Josef Birkl

Raimund Konig

Johannes Maget

Stefan Hierl

Sven Wolfram

Eduard Shulzhenko

Raimund Koenig

Stephan Hierl

Stefanie Schreiter

Helmut Hirschmann

Sascha Ludewig

Johannes Wiesinger

Arnd Erhardt

Florian Gaeck

Thomas Seitz

Michael Rock

Martin Strobl

Edmund Zaeuner

Walter Aumeier

Wolfgang Zischank

Willibald Duschek

Martin Stuiber

Kerstin Koller

Klaus-Peter Müller

Raimund KÖNIG

Ludovit Jurcacko

Ferdinand Valent

Ludovit Hüttner

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 triggered fuse for low-voltage applications for protecting devices that can be connected to a power supply system, in particular surge protection devices, consisting of at least one fusible conductor which is located between two contacts and is arranged in a housing, and also consisting of a trigger device for controlled disconnection of the fusible conductor in the event of malfunctions or overload states of the respective connected device, wherein an arc quenching medium is introduced into the housing. The at least one fusible conductor has a plurality of conventional electrical bottlenecks, which are designed for the rated load of the respective fuse. At least one further additional geometric bottleneck is provided, which is disconnectable by rupturing depending on the trigger unit when applied by tension.

Triggered fuse for low-voltage applications

The invention relates to a device for detecting electrical currents on or in the vicinity of electrical conductors with at least one Reed switch as a magnetically responsive switch, which is arranged in the vicinity of the electrical conductor such that, when there is a significant current flow through the conductor, the magnetic field created triggers the switch and initiates an evaluation electronics connected to the switch. For the detection of surge current variables and the differentiation between long-term pulsed currents and short-term pulsed currents, a plurality of Reed switches are arranged at a predetermined distance from the electrical conductor, wherein the evaluation electronics determines the response and the switching times of the respective Reed switches, determines die surge current variable from the allocation of the determined values to the respective Reed switch and the pulse form from the switching time, wherein, for the purpose of adjusting the response behavior, at least one of the Reed switches comprises a shielding for influencing the magnetic field acting on the respective Reed switch.

Device for detecting electrical currents on or in the vicinity of electrical conductors

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 triggered fuse for low-voltage applications for protecting devices that can be connected to a power supply system, in particular surge protection devices, consisting of at least one fusible conductor which is located between two contacts and is arranged in a housing, and also consisting of a trigger device for controlled disconnection of the fusible conductor in the event of malfunctions or overload states of the respective connected device, wherein an arc quenching medium is introduced into the housing. By way of example, an arc quenching medium-free region is formed in the housing such that the at least one fusible conductor is exposed, and a mechanical disconnection element can be introduced into the arc quenching medium-free region via an access point in the housing in order to mechanically destroy the at least one fusible conductor depending on the trigger device, and independently of its melting integral.

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 detecting electrical currents on or near electrical conductors with at least one reed switch as a magnetically responsive switch, which is arranged near the electrical conductor such that when there is a significant current flow through the conductor, the magnetic field created triggers the switch and initiates evaluation electronics connected to the switch. For the detection of surge current variables and differentiation between long-term pulsed currents and short-term pulsed currents, a plurality of reed switches is arranged at pre-determined, different, increasing distances from the electrical switch, the evaluation electronics determining the response and the switching times of the respective reed switches. The surge current variables are determined from the association of the determined values with the respective reed switch and the pulse shape from the switching time.

Device for detecting electrical currents on or near electrical conductors

A surge protection device comprises at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protector. Insulated electric conductors on or in the socket part are contacted by vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. The openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.

Surge protection device with at least one surge protection unit

The invention relates to a single- or multi-pole switching device, in particular for DC applications, having at least one rotating switching element () which is connected to a drive, and also comprising switching contacts (), connection pieces () and connection poles or connection terminals () and a housing arrangement which accommodates the abovementioned parts. According to the invention, a movably guided rotary cylinder () is formed in the housing arrangement, said rotary cylinder being located in a body which is designed as a rotary cylinder holder (). The rotary cylinder () has at least one contact pin () which passes radially or tangentially or eccentrically through the rotary cylinder and has, at its end, a contact piece () in each case. Mating contact pieces () are arranged in the rotary cylinder holder (), said mating contact pieces being electrically connected to the connection pieces () or connection poles or connection terminals (). A narrow, arc-influencing gap is present between the rotary cylinder () and the rotary cylinder holder (), wherein, as a result of the movement of the rotary cylinder (), the electrical connection between the contact pieces () and the mating contact pieces () can be broken by way of the contact pin () and the resulting disconnection arcs () enter the air gap subject to an extension and are rapidly extinguished there.

Single- or multi-pole switching device, in particular for DC applications

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

The invention relates to a spark gap arrangement for use in power supply systems, especially in low-voltage systems, comprising an arcing chamber in which an electric arc is formed between two electrodes of the spark gap. An intermediate chamber ( ) is provided downstream of the arcing chamber ( ). Said intermediate chamber has a much greater volume than the arcing chamber ( ). A pressure-proof flow channel ( ), preferably consisting of metal, is provided as the connection between the arcing chamber ( ) and the intermediate chamber ( ).

Spark gap arrangement

A spark gap for use in the power supply of medium voltage and low voltage networks, wherein two rotationally symmetric electrodes are arranged in a housing and an arc space is provided between the two electrodes for the arc which is formed in the event of a spark-over and its follow-on current. The two electrodes are arranged in the direction of the longitudinal center axis of the spark gap one behind the other and at a distance from each other. A disk of an electrically insulating material is positioned perpendicularly of the longitudinal center axis so as to electrically separate the two electrodes from each other. The insulating disk has an opening adapted to the hollow cylindrical inner space forming the spark-over place for the arc. The arc space includes a rotationally symmetric arc chamber arranged concentrically with the longitudinal center axis for the follow-on current. The arc chamber is positioned between the two electrodes. The electrically active length of the arc chamber can be selected differently while the outside dimensions of the spark gap are maintained.

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Neumarkt, Germany

Peter Zahlmann