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Cross-sectional area insulation

Symbol
$A_i$
Unit
mm$^2$
Formulas
$\frac{\pi}{4} \left({D_{is}}^2-{d_c}^2\right)$
Related
$d_c$
External diameter conductor [mm]
$D_{is}$
Diameter over insulation screen [mm]
$\pi$
Archimedes' constant $\pi$
Used in
$m_i$
Mass insulation [kg/m]
$Q_i$
Thermal capacitance insulation [J/(m.K)]