DIN EN IEC 62631-3-4 VDE 0307-3-4:2020-07

Dielectric and resistive properties of solid insulating materials

Part 3-4: Determination of resistive properties (DC methods) – Volume resistance and volume resistivity at elevated temperatures

DIN IEC 60345 VDE 0303-32:1996-08

Method of test for electrical resistance and resistivity of insulating materials at elevated temperatures