METHOD AND APPARATUS FOR DETECTING AN ARC IN A DC CIRCUIT

摘要

The invention relates to a method for detecting an arc in a DC circuit. The method comprises the following steps. An AC component (IAC) of a current (I) flowing in the circuit is measured and analyzed and at least one parameter of the AC component (IAC) is determined. The level of a DC component (IDC) of the current (I) is varied and a degree of correlation between the level of the DC component (IDC) of the current (I) flowing in the DC circuit and the at least one parameter of the AC component (IAC) is determined. An arc is detected and signaled on the basis of the degree of correlation determined. The invention also relates to an apparatus for carrying out the method and to an inverter comprising such an apparatus.