Dehn Se + Co Kg

Dehn + Söhne Gmbh + Co Kg

Dehn Se

Thomas Böhm

Franz Schork

Josef Birkl

Arnd Ehrhardt

Peter Zahlmann

Klaus Bühler

Eduard Shulzhenko

Johannes Maget

Julius Maria Schrafl

Florian Gäck

Michael Hess

Ralph Brocke

Benjamin Moosburger

Hans Herold

Markus Götz

Dominik Wölfl

Thomas Sellerer

Bernhard Eichler

Dominik Donauer

Johannes Spies

Dominik WÖLFL

Markus GÖTZ

Julius Schrafl

The invention provides a surge protector, in particular for information technology and/or communications technology systems, which is equipped with: a housing (ST, BT; GT); a first input terminal (E) for applying a first external voltage signal; a second input terminal (E) for applying a second external voltage signal; a first output terminal (A) for outputting the first external voltage signal; a second output terminal (A) for outputting the second external voltage signal; a surge protection circuit device (G, R, Z; G, G, R, R, Z; G, G, R, R, Z, Z), at least part of which is provided on a circuit board (P) located in the housing (ST, BT; G); a first current path (ST) for conducting the first external voltage signal from the first input terminal (E) to the first output terminal (A) bypassing the surge protection circuit device (G, R, Z; G, G, R, R, Z; G, G, R, R, Z, Z); a second current path (ST) for conducting the second external voltage signal from the second input terminal (E) to the second output terminal (A) bypassing the surge protection circuit device (G, R, Z; G, G, R, R, Z; G, G, R, R, Z, Z); a third current path (ST) for conducting the first external voltage signal from the first input terminal (E) to the first output terminal (A) via the surge protection circuit device (G, R, Z; G, G, R, R, Z; G, G, R, R, Z, Z); a first switching contact device (F) for opening and closing the first current path (ST); a first electrical surge protection component (G) which is connected between the first and third current paths (ST, ST); and a mechanical tripping device (AU; B, S, EF, SL) for opening the first switching contact device (F) when in a non-tripped state and for closing the first switching contact device (F) in order to interrupt the third current path (ST) when in a tripped state at a tripping current in the surge protection circuit device (G, R, Z; G, G, R, R, Z; G, G, R, R, Z, Z) caused by exceeding a nominal parameter and/or by degradation of the components.

Surge protector

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

Circuit assembly for protecting a unit to be operated from a supply network against surges, comprising an input having a first and a second input connection, which are connected to the supply network, an output to which the unit to be protected can be connected, and a protective circuit which is placed between the first and the second input connections in order to limit the voltage applied thereto, said protective circuit comprising a power semiconductor device. The power semiconductor device includes at least one Zener element between the collector and the gate, or a digital-to-analog converter is placed between the collector and the gate of the power semiconductor device. The protective level of this type of protective circuit can be easily adjusted by setting the clamping voltage for the power semiconductor device.

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

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

The invention relates to an electronic circuit-breaker for a load (RL) that can be connected to a low-voltage dc-voltage network, the circuit-breaker consisting of assemblies provided between input terminals and the load and said assemblies comprising a voltage monitoring unit (TVS, R), a current monitoring unit (Shunt, OPV), semiconductor switch units (MOSFET) and controllers (uC) associated therewith. According to the invention, a series circuit consisting of a TVS diode (TVS) and a resistor (R) is connected to the input terminals, the resistor having a connection to a first connector () of a microcontroller (uC) and the resultant voltage drop at the resistor providing the microcontroller with an overvoltage identification signal if a breakdown voltage is reached at the TVS diode as a result of an overvoltage. A second connector () of the microcontroller has a connection to a first semiconductor switch unit (MOSFET), the first semiconductor switch unit being in series, as an elongate switch, with the load (RL), and the microcontroller disabling the switch in the event of an overvoltage detection signal. A shunt acting as a current monitoring unit is in series with the load, the voltage drop at the shunt being analysed by the microcontroller via a third connector () and if an overcurrent which exceeds a threshold value is identified, the load is switched off by means of the first semiconductor switch unit. In addition, a MOS-gated thyristor (MGT) is connected between the input terminals, the control input of said thyristor having a connection to a fourth connector () of the microcontroller, such that the MOS-gated thyristor can be activated in the event of an overvoltage identification signal.

Electronic circuit-breaker for a load that can be connected to a low voltage DC-voltage network

The invention relates to a method for sensing lightning-current parameters at installations comprising a plurality of capturing devices and lightning-current diversion paths, in particular for exposed and/or tall buildings, including wind turbines, by using a plurality of sensors on the lightning-current diversion paths to identify a lightning-current event, and comprising subsequent evaluation of the lightning-current event and the effect of the lightning-current event on the particular installation. According to the invention, a lightning-current detection sensor is formed on each of the capturing devices or each lightning-current diversion path, which lightning-current detection sensor provides a yes/no statement concerning a lightning-current event with respect to the particular capturing device or the particular lightning-current diversion path. Furthermore, at least one lightning-current measurement sensor is provided at a central point of the merging of the lightning-current diversion paths toward the ground, which at least one lightning-current measurement sensor detects both surge currents having a duration of less than 5 ms and long-term currents having a duration of more than 5 ms, wherein furthermore the magnitude of the charge of the particular long-term current that has occurred is determined and is used to determine possible effects on the installation.

Method for sensing lightning-current parameters at installations having one or more capturing devices and lightning-current diversion paths

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

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Hohenfels, Germany

Thomas Böhm