ARC FAULT DETECTION ARRANGEMENT FOR A DC ELECTRIC BUS

An arc fault detection arrangement (50) for a DC electric bus (100), said DC electric bus having a plurality of electric lines (L1, L2, LN) adapted to electrically connect a source section (200) and a load section (300) of an electric apparatus (500), said arc fault detection arrangement comprising an arc fault detector (10) adapted to receive and process detection signals (DS) indicative of AC currents flowing along said electric lines (L1, L2, LN) characterised in that it comprises a current sensing device (1). Said current sensing device comprises: - primary winding means (21) comprising a plurality of first primary winding conductors (PW1 1 , PW1 2 , PW1 N ) adapted to be electrically connected in series with source portions (C1 S ) and load portions (C1 L ) of corresponding first line conductors (C1) of said electric lines (L1, L2, LN); - secondary winding means (22) magnetically coupleable with said first primary winding means, said secondary winding means comprising at least a first secondary winding conductor (SW1) electrically connected with said arc fault detector (10) to provide said detection signals (DS) to said arc fault detector.