Symbol
$a_{\mathrm{m}}$
Unit
mm
Formulae
$\left(a_{\mathrm{12}} a_{\mathrm{23}} a_{\mathrm{31}}\right)^{0.333}$three-phase system, individual
$s_{\mathrm{c}}$three-phase system, trefoil
$1.2596299799474 a_{\mathrm{12}}$three-phase system, flat equal distance
$s_{\mathrm{c}}$two-phase system or multi-core cables
Related
$a_{\mathrm{12}}$
$a_{\mathrm{23}}$
$a_{\mathrm{31}}$
Used in
$L_{\mathrm{m}}$
$M_{\mathrm{m}}$