Fig. 1From: Modelling the magnetic field caused by a dc-electrified railway with linearly changing leakage currentsLeakage current J = J (x) given by Eq. (1) between the substation at x = 0 and the train at x = L = 3 km. The total leakage current expressed by Eq. (3) equals J0 = 20 A. The lower (red) line and the upper (blue) curve correspond to a constant and to a linearly increasing leakage current density j = j(x) per unit length between x = 0 and x = L, respectively.Back to article page