Sma Solar Technology Ag

Ti Automotive (fuldabruck) Gmbh

Ti Automotive Limited

Torsten Otto

Marcel Kratochvil

Kurt Apel

Rainer Schmitt

Sybille Pape

Kurt Dipl-Ing Apel

The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δtand the power flow P is suppressed in an inactive time window with the second period Δt. Via detection of an input current Iflowing at the input and/or an input voltage Uapplied to the input and comparison of values of the input current Iand/or input voltage Udetected in the inactive time window with a current threshold value Ior a voltage threshold value Uan arc presence criterion is signaled if the input current Idetected in the inactive time window falls below the current threshold value Iand/or the input voltage Udetected in the inactive time window does not exceed the voltage threshold value U. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.

Method and circuit arrangement for detecting an arc and photovoltaic (PV) inverter having a corresponding circuit arrangement

A method of grounding a tube to a chassis wherein a plastic clip made conductive by the incorporation of conductive particles therein, is clamped onto the jacket of metal automotive vehicle tubing so that projections on the clip penetrate through the jacket to engage the outer surface of the metal tube. The clip body is welded to the jacket to hermetically seal the region of contact between the clip and the metal.

Method of grounding a jacketed metal tube using a clip welded to the jacket

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Ahnatal, Germany

Torsten Otto