Cableizer ®

Substitution coefficient $\Delta_1$ for eddy-currents

Symbol
$\Delta_{1}$
Formulas
$\left(1.14{m_{0}}^{2.45}+0.33\right) \left(\frac{d_{e}}{2s_{c}}\right)^{0.92m_{0}+1.66}$trefoil arrangement and non-flat formations
$4.7{m_{0}}^{0.7} \left(\frac{d_{e}}{2s_{c}}\right)^{0.16m_{0}+2}$flat formation, other outer phase (leading 3/T/W)
$0.86{m_{0}}^{3.08} \left(\frac{d_{e}}{2s_{c}}\right)^{1.4m_{0}+0.7}$flat formation, middle phase (1/R/U)
$\frac{-0.74\left(m_{0}+2\right) \sqrt{m_{0}}}{2+\left(m_{0}-0.3\right)^2} \left(\frac{d_{e}}{2s_{c}}\right)^{m_{0}+1}$flat formation, outer phase with greater loss (lagging 2/S/V)
Related
$d_{e}$
Equivalent diameter of screen/sheath and armour [mm]
$m_{0}$
Substitution coefficient $m_0$ for eddy-currents [Hz.m/$\Omega$]
$s_{c}$
Separation of conductors in a system [mm]
Used in
$\lambda_{12}$
Loss factor shield, eddy currents