Loss factor of insulation

The values for the loss factor of insulation are taken from standard IEC 60287-1-1 Ed.2.1 where available with the following additions:

Values for Polypropylene (PP) and Silicone rubber (SiR) are taken from kronjaeger.com

Symbol

$\mathrm{tan} \delta_i$

Related

$M_i$

$U_n$

Used in

$W_d$

Choices

Material	Value
PE	0.001
HDPE	0.001
XLPE	0.004 (U_n <= 30kV) 0.001 (U_n > 30kV)
XLPEf	0.005
PVC	0.1
EPR	0.02 (U_n <= 30kV) 0.005 (U_n > 30kV)
IIR	0.05
PPLP	0.0014
Mass	0.01
OilP	0.0035 (self-contained U_n <= 60kV) 0.0033 (self-contained 60kV < U_n <= 150kV) 0.003 (self-contained 150kV < U_n <= 280kV) 0.0028 (self-contained 280kV < U_n <= 500kV) 0.0045 (pipe-type oil-filled) 0.004 (pipe-type external gas pressure) 0.0045 (pipe-type internal gas pressure)
PP	0.001
SiR	0.025
EVA	0.022
XHF	0.052