Paper Cable Saturants: European Preferences and Selection

Empiric Approach for Criteria Determination of Remaining Lifetime Estimation of MV PILC Cables

“…Also its dielectric loss angle  is less dependent on the temperature. One of its disadvantages, as given in (Bennett, October 1957), is that brand new cables could contain numerous voids, due to the high expansion coefficient of the material. Also, the compound retains its nondraining properties up to 70°C, nowadays improved to 90°C, or even 100°C, (Kock & Strauss, 2004).…”

“…At the beginning of 20th century, mineral oils have been used, followed by oil-rosin up to lastly non-draining (non-migratory) compounds in the time before World War II, (Bennett, October 1957). This poly-isobutylene compound -MIND (mass-impregnation with non-draining compound) held up to today.…”

“…Herby, the paper presents the weaker component, and it's therefore the main cause of the insulation ageing. As presented in (Bennett, October 1957) the degradation of the mass is an oxidative and slow process. Moreover, oxygen presence in the cable insulation is not worth of consideration differing it from the oil insulation in transformer.…”