Parameter $\xi$ for calculation of loss factor

Symbol
$\xi_{cb}$
Formulae
$\frac{2 \sqrt{3} P_{cc} Q_{cc} R_{e} X_{m}}{3 \left(P_{cc}^{2} + R_{e}^{2}\right) \left(Q_{cc}^{2} + R_{e}^{2}\right)}$flat formation, not transposed, other outer phase (leading 3/T/W)
$\frac{0.25 Q_{cc}^{2}}{Q_{cc}^{2} + R_{e}^{2}}$flat formation, not transposed, middle phase (1/R/U)
$\frac{0.75 P_{cc}^{2}}{P_{cc}^{2} + R_{e}^{2}}$flat formation, not transposed, outer phase with greater loss (lagging 2/S/V)
Used in
$\lambda_{1cb}$