Cable Calc — Formula

[ V_d = \sqrt3 \cdot I \cdot L \cdot (R \cos\phi + X \sin\phi) \quad \text(3-phase) ]

[ I = \sqrt\frac\theta_max - \theta_ambR_dc \cdot \left(1 + \alpha(\theta_max - 20)\right) \cdot \left( R_th \right) ] cable calc formula

[ I_rms = \sqrtI_1^2 + I_2^2 + ... + I_h^2 ] And derating factor: [ V_d = \sqrt3 \cdot I \cdot L