Electrical treeing-physical details obtained by pulse-sequence-analysis

摘要

The paper demonstrates that pulse-sequence-analysis allows a better insight into the phenomena which occur during tree initiation and growth in polyethylene. Tree growth in polyethylene is not a continuous monotonous process, but a phenomenon which incorporates different processes. Even with constant voltage load, one or another effect is predominant. After a period of very low discharge activity, a higher discharge activity (but still including discharge free intervals) may occur for some ten seconds. This may be followed by a longer period of very high discharge activity without any discharge free time intervals.