Induced shield voltage

Definition according to IEEE 575-2014 Annex D parameter $E_p$)

Symbol
$U_k$
Unit
V/m
Formulae
$\begin{bmatrix}I_{1} | I_{2} | I_{3} \end{bmatrix} \times \begin{bmatrix}X_{11} X_{12} X_{13} | X_{21} X_{22} X_{23} | X_{31} X_{32} X_{33} \end{bmatrix} \times I_{c}$