Factor $\beta_M$

Factor $\beta_M$ for the calculation of the geometric factor for multi-core cables according to IEC 60287-2-1.

Symbol
$\beta_{M}$
Formulae
$\frac{\alpha_{M} \left(\frac{X_{G}}{Y_{G} + 1} - 0.5\right)}{\frac{X_{G}}{Y_{G} + 1} + 1.5}$$n_{c} \leq 2$
$\frac{\alpha_{M} \left(\frac{2 \sqrt{3} \left(\frac{2 X_{G}}{Y_{G} + 1} + 1\right)}{3} - 3\right)}{\frac{2 \sqrt{3} \left(\frac{2 X_{G}}{Y_{G} + 1} + 1\right)}{3} + 3}$$n_{c} \geq 3$
Related
$\alpha_{M}$