Title :
A study on electrical breakdown by water treeing in XLPE
Author :
Tanimoto, Gen ; Wang, Shinan ; Aida, Fumio ; Fujiwara, Yasutaka
Author_Institution :
Showa Electr. Wire & Cable Co. Ltd., Kawasaki, Japan
Abstract :
We investigated the space charge characteristics in sheet samples under AC field which have water trees developed by using various kinds of electrolytes. The results show that: homo charge was formed around the tip of water trees independent of the electrolyte species; the amount of space charge varied with electrolyte species (among the electrolytes used, ferrous sulfate induced the largest space charge in spite of water tree growth being relatively small); the space charge induced by water trees changes the internal field distribution in the insulation; the harmfulness of specific ions with regard to electrical breakdown cannot be explained simply by the change in the field distribution
Keywords :
XLPE insulation; ageing; electric breakdown; insulation testing; power cable insulation; space charge; trees (electrical); 200 hour; 5 kHz; 5 kV; AC field; FeSO4; MnSO4; Na2SO4; PEA method; XLPE; aging test; electrical breakdown; electrolyte species; ferrous sulfate; homo charge; insulated cables; internal field distribution; sheet samples; space charge characteristics; water treeing; Cable insulation; Cables; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Impurities; Oxidation; Space charge; Testing; Trees - insulation;
Conference_Titel :
Electrical Insulating Materials, 1995. International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
4-88686-047-8
DOI :
10.1109/ISEIM.1995.496601