Deterioration of Water-Immersed Polyethylene-Coated Wire by Treeing
- 1 September 1971
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electrical Insulation
- Vol. EI-6 (3) , 129-135
- https://doi.org/10.1109/tei.1971.299145
Abstract
Although some reports of the water-resisting life of polyethylene-insulated wires have been made, studies of mechanism of the deterioration phenomenon have been scarcely reported. In this paper, it is pointed out that a major cause of the deterioration of polyethylene-coated wire in water is the occurrence of the "treeing" phenomena. An accelerated deterioration test through the use of high-frequency voltage has been developed. Using this accelerated test, experiments were conducted on the deterioration phenomenon of insulating wires under various conditions. The causes of tree generation were elucidated and a new type of insulating wires was developed. It has been discovered that when the polyethylene-insulated wire is immersed in water and voltage is applied (as occurs in a submersible pump) treeing will occur at extremely low voltages and is sensitive to the copper in the conductor. A metal barrier over the conductor greatly increases the insulation life owing to the effect of double layers.Keywords
This publication has 3 references indexed in Scilit:
- An Accelerated Screening Test for Polyethylene High-Voltage InsulationTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1962
- Treeing in Polyethylene as a Prelude to BreakdownTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1958
- Breakdown of solid dielectrics in divergent fieldsProceedings of the IEE Part C: Monographs, 1955