Title :
Initial Tree Growth in PMMA
Author :
Watson, D.B. ; Morrin, P.C.
Author_Institution :
Department of Electrical Engineering University of Canterbury Christchurch, New Zealand
Abstract :
This paper describes a study of tree growth in polymethylmethacrylate (PMMA) at the inception voltage under surge and dc conditions. Inception voltage and initial tree penetration are sensitive to polarity, a consequence of space charge injection. All trees are composed of similar branch segments. Results are discussed in terms of the PMMA structure.
Keywords :
Coils; Dielectrics; Electrodes; Heating; Microscopy; Space charge; Surges; Testing; Voltage; Wire;
Journal_Title :
Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TEI.1980.298332
