Title :
Dielectric Loss Characteristics of Oil Filled Cable Insulation Impregnated by Extremely Bad Tanδ Oil
Author :
Takahashi, Tohru ; Nakajima, Takenori ; Nakade, Masahiko ; Ide, Kenichi
Author_Institution :
R&D Dept., VISCAS Corp., Chiba
Abstract :
In spite of being extremely large value of oil tandelta (several ten % of tandelta for example) in some oil filled (OF) cable splice box etc, there has been no such an event as a thermal breakdown due to dielectric loss up to the present. Therefore we examined the tandelta characteristics of OF cable insulation impregnated by extremely bad tandelta oil in detail. As a result, it turned out that the tandelta suppression effect by the following two reasons had acted, and was verified in the real use OF cable splice box insulation flowed by bad tandelta oil. (1) Tandelta decrease in high electrical stress (including operating stress of OF cable) region by so-called Garton effect which is related with the ion mobility of oil. (2) Tandelta decrease due to the absorption of ionic substance in oil to the insulating paper. The two above-mentioned effects are larger in the mineral oil than in the alkyl-benzene oil
Keywords :
dielectric losses; impregnated insulation; insulation testing; ion mobility; oil filled cables; Garton effect; dielectric loss characteristics; electrical stress; extremely bad tandelta oil; insulating paper; ion mobility; ionic substance absorption; mineral oil; oil filled cable splice box insulation; oil impregnation; tandelta suppression effect; thermal breakdown; Absorption; Cable insulation; Dielectric breakdown; Dielectric losses; Dielectrics and electrical insulation; Minerals; Oil filled cables; Oil insulation; Petroleum; Stress;
Conference_Titel :
Properties and applications of Dielectric Materials, 2006. 8th International Conference on
Conference_Location :
Bali
Print_ISBN :
1-4244-0189-5
Electronic_ISBN :
1-4244-0190-9
DOI :
10.1109/ICPADM.2006.284166
