Title :
Water treeing in polyethylene at low temperature region (-196 °C ∼ -10 °C)
Author :
Shirai, Y. ; Kumazawa, T. ; Shimizu, N.
Author_Institution :
Meijo Univ., Nagoya, Japan
Abstract :
The properties of water treeing at low temperatures below 0 °C are very important in clarification of the water tree initiation mechanisms. We investigated the properties of water treeing in polyethylene (PE) in the temperature region (-196 °C ∼ -10 °C). We found that water tree is formed even at -65 °C, and the initiation rate and the length of water tree increase with temperature above -65 °C. Water tree is not formed below -100 °C. We consider that at below -100 °C PE is in the glass state and that the movement of water molecules and ions in PE is very restricted.
Keywords :
polyethylene insulation; polymers; trees (electrical); -196 to -10 degC; PE; glass state; low temperature; polyethylene; temperature dependence; tree initiation mechanism; tree initiation rate; water tree length; water treeing; Electrodes; Glass; Ice; Mechanical factors; Needles; Polyethylene; Steel; Temperature; Trees - insulation; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2002 Annual Report Conference on
Print_ISBN :
0-7803-7502-5
DOI :
10.1109/CEIDP.2002.1048956
