The dielectric loss should be taken into account for values of $U_o$ equal to or greater than the following. Below this value, the dielectric loss can be omitted.

In cableizer, the dielectric loss is calculated for all AC systems with an operating voltage of 1 kV and higher.

Symbol
$\lambda_{\mathrm{d}}$
Unit
-
Related
$W_{\mathrm{d}}$
Choices
Operating voltageDielectric loss to be considered for
$U_o$ ≥ 127kVPE, HDPE, XLPE
$U_o$ ≥ 63.5kVXLPEf, EPR, Oil, PPLP
$U_o$ ≥ 38kVMass
$U_o$ ≥ 18kVIIR
$U_o$ ≥ 6kVPVC
$U_o$ < 6kVnone