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Esie Ramezani

Tomas Lars Jonsson

Bo Bijlenga

Peter Lundberg

Nicklas Johansson

The invention relates to a converter provided with a resonant circuit (), which converter comprises a device () for measuring the derivative (dI/dt) of the current through the current valves) and a detection device () co-operating with said measuring device () for detecting a short-circuit in the converter, the detection device () being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device () is equal to or exceeds a stipulated current derivative limit value (dI/dt) during a length of time exceeding a stipulated time limit value (t). The invention also relates to a method for controlling such a converter.

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Möriken, Switzerland

Esie Ramezani