TY - GEN
T1 - Effect of water absorption on the dielectric properties of neat and nanosilica filled impregnating resins
AU - Niedernhuber, J.
AU - Kindersberger, J.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014
Y1 - 2014
N2 - Impregnating resins in high voltage machines are exposed to harsh environmental conditions characterized by high operating temperatures and high electric field. During maintenance humidity in the environment may lead to uptake of water and thus to a change of the material properties. In this study the impact of water uptake on the dielectric properties is investigated for neat epoxy- and UP-resins as well as for UP-resins with nano-scale silica fillers. Plate specimens were immersed in water at 50 °C. This leads to an uptake of moisture and thus an increase in weight. At regular intervals mass, loss tangent and relative permittivity are measured until weight as well as dielectric properties have reached steady state condition. It is shown, that the uptake of water varies with the type of polymer. Loss tangent and permittivity are rising with the content of water whereby the rise characteristic depends on the type of polymer. The effect of filler on water uptake as well as on dielectric properties is marginal.
AB - Impregnating resins in high voltage machines are exposed to harsh environmental conditions characterized by high operating temperatures and high electric field. During maintenance humidity in the environment may lead to uptake of water and thus to a change of the material properties. In this study the impact of water uptake on the dielectric properties is investigated for neat epoxy- and UP-resins as well as for UP-resins with nano-scale silica fillers. Plate specimens were immersed in water at 50 °C. This leads to an uptake of moisture and thus an increase in weight. At regular intervals mass, loss tangent and relative permittivity are measured until weight as well as dielectric properties have reached steady state condition. It is shown, that the uptake of water varies with the type of polymer. Loss tangent and permittivity are rising with the content of water whereby the rise characteristic depends on the type of polymer. The effect of filler on water uptake as well as on dielectric properties is marginal.
UR - https://www.scopus.com/pages/publications/84988259263
U2 - 10.1109/ICHVE.2014.7035449
DO - 10.1109/ICHVE.2014.7035449
M3 - Conference contribution
AN - SCOPUS:84988259263
T3 - ICHVE 2014 - 2014 International Conference on High Voltage Engineering and Application
BT - ICHVE 2014 - 2014 International Conference on High Voltage Engineering and Application
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 4th International Conference on High Voltage Engineering and Application, ICHVE 2014
Y2 - 8 September 2014 through 11 September 2014
ER -