... features:1. Rated voltage: Uo/U:3.6/6kV, 6/10kV(11kV), 12/20kV(24kV), 19/33kV, ... the conductor complies with the stipulations of 3.6/6kV, 6/10kV(11kV), 12/20kV(24kV), 19/33kV, ... 0oC when lay. Otherwise it should be preheated.6. The cable is laid without horizontal drop limit ... for D.C. system only. If used for A.C. system, the magnetic isolation should be applied ... IEC 60502-2 / NF C 33-220 6/10 (12) kV