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Thickness of filler/belt insulation

Symbol
$t_f$
Unit
mm
Used in
$A_f$
Cross-sectional area of filler [mm$^2$]
$\alpha_p$
Factor $\alpha_p$
$C_b$
Capacitance of insulation [F/m]
$D_{ab}$
Diameter over armour bedding [mm]
$D_{core}$
Diameter over core cable [mm]
$D_f$
External diameter of the filler [mm]
$D_{scb}$
Diameter over screen bedding [mm]
$D_{shb}$
Diameter below sheath [mm]
$t_1$
Thickness of insulation to sheath [mm]
$t_{1t}$
Thickness of insulation to sheath, transient [mm]
$t_2$
Thickness of bedding under armour [mm]
$t_{sha}$
Total thickness between separate sheath and armour [mm]