Methods to characterize charging effects
Abstract
Methods to characterize charging in insulating material under high voltage dc stress, leading to electrical breakdown, are reviewed. The behavior of the charges can be studied by ac loss angle measurements after application or removal of dc bias. Measurements were performed on oil-paper and oil-Mylar systems. The poor reproducibility of the measurements makes it impossible to draw more than qualitative conclusions about the charging effects. With an ultrasound pressure wave the electric field distribution in a material can be determined. An alternative derivation for the transient response of a system which elucidates the influence of several parameters in a simple way is given.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1984
- Bibcode:
- 1984STIN...8632625S
- Keywords:
-
- Dielectrics;
- Electric Charge;
- Electrical Insulation;
- Direct Current;
- Electrical Measurement;
- High Voltages;
- Losses;
- Transient Response;
- Ultrasonics;
- Electronics and Electrical Engineering