Effect of arc-levitating from polluted insulators' surface in the low air pressure on its DC flashover performance

Jiang, Xingliang; Chen, L.; Zhang, Zhijun; Sun, Caixin; Shu, Lichun; Nazir, M. Tariq

doi:10.1049/iet-gtd.2010.0789

Cited by 21 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of these are summarized as follows. In different research studies, [24][25][26][27] a comparative analysis under DC and AC voltages is performed and it is observed that the earlier causes stronger degradation of materials' properties than the latter. Other contributions in the form of examining accelerated aging behavior under DC stress for 5000 hours are reported in the studies.…”

Section: Introductionmentioning

confidence: 99%

RTV-SiR based composites aged in a multi-stressed environment under AC and bipolar DC voltages

Mahmood

Alam

2022

Journal of Elastomers & Plastics

View full text Add to dashboard Cite

Silicone rubber-based polymers are gradually replacing traditional insulators in outdoor applications due to their numerous advantages, in particular high hydrophobicity that is important for suppressing leakage current and hence surface flashover. However, the main problem with polymeric composites is their aging when exposed to environmental stresses causing loss of their desired properties and expected lifetime. In this work, aging behavior of three types of room temperature vulcanized silicon rubber (RTV-SiR) loaded with nano-silica and micro-ATH is studied. Samples of the materials with different specifications were fabricated and exposed to various environmental stresses in two specially designed weather chambers under both AC and bipolar DC voltages for a time period of 9000 hours. Thereafter, diagnosis was performed for identifying the degree of deterioration using several techniques. These include hydrophobicity classification, measurements of leakage current and mechanical properties, Fourier transform infrared spectroscopy, and Thermogravimetric analysis. Results of the conducted experiments indicated stronger degradation of the desired properties under positive DC stress as compared to the AC and negative DC voltages. Moreover, silicone rubber doped with nano-sized particles of silica filler demonstrated better anti-aging performance as compared to its micro-ATH filled counterpart.

show abstract

Section: Introductionmentioning

confidence: 99%