Tytuł pozycji:
Measurements of physicochemical and electrical properties of insulating liquids
This paper provides a comparative analysis of key physicochemical and electrostatic
parameters of Trafo En oil and Midel 7131® synthetic ester, changing in temperature and
accelerated thermal ageing. The parameters tested included the density, kinematic viscosity,
conductivity and relative electric permittivity. In addition to that, Electrostatic
Charging Tendency (ECT) tests of those fluids were performed in a flow system using
cellulose and aramid paper pipes. The effect of liquid flow velocity combined with temperature
variations and accelerated ageing time on the streaming electrification current
generated was determined. The relationship between the fluid electrification degree and
measuring pipe material was also investigated.