Cableizer ®

Diameter over screen bedding

This is the diameter below screen, sometimes called $D_1$.

Symbol
$D_{scb}$
Unit
mm
Formulas
$d_{c}+t_{i1}+2t_{scb}$Standard case
$F_{x} \left(d_{c}+t_{i1}\right)+2\left(t_{f}+t_{scb}\right)$round cables, sector-shaped conductors, common screen
$D_{i}+2\left(t_{f}+t_{scb}\right)$multi-core cables, sector-shaped conductors, common screen
$D_{i}+2t_{scb}$multi-core cables, sector-shaped conductors, separate screen
Related
$d_{c}$
External diameter conductor [mm]
$D_{i}$
Diameter over insulation incl. insulation screen [mm]
$F_{x}$
Geometrical distance factor for multi-core cables
$t_{f}$
Thickness of filler/belt insulation [mm]
$t_{i1}$
Thickness of insulation between conductors [mm]
$t_{scb}$
Thickness screen bedding [mm]
Used in
$A_{sc}$
Cross-sectional area screen [mm$^2$]
$A_{scb}$
Cross-sectional area screen bedding [mm$^2$]
$D_{f}$
Diameter over filler [mm]
$D_{sc}$
Diameter over screen [mm]
$d_{sc}$
Mean diameter screen [mm]
$r_{osc}$
Radius over capacitive insulation layers [mm]
$T_{scb}$
Thermal resistance screen bedding [K.m/W]