1. Effects of aging on the structural, mechanical, and thermal properties of the silicone rubber current transformer insulation bushing for a 500 kV substation
- Author
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Zhang Xinghai, Zhou Yiqian, Wang Fangqiang, Lan Xinsheng, and Zhigao Wang
- Subjects
Thermogravimetric analysis ,Materials science ,Polymers ,Characterization ,02 engineering and technology ,Silicone rubber ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,0103 physical sciences ,Thermal stability ,Composite material ,External insulation ,010302 applied physics ,chemistry.chemical_classification ,Multidisciplinary ,Research ,Polymer ,021001 nanoscience & nanotechnology ,Current transformer ,Aging analysis ,Cracking ,chemistry ,Bushing ,0210 nano-technology ,Alternating current - Abstract
In order to analyze the cracking and aging reason of the silicone rubber current transformer (CT) insulation bushing used for 8 years from a 500 kV alternating current substation, characteristics including Fourier transform infrared (FTIR) spectroscopy, mechanical properties analysis, hardness, and thermo gravimetric analysis have been carried out. The FTIR results indicated that the external surface of the silicone rubber CT insulation bushing suffered from more serious aging than the internal part, fracture of side chain Si–C bond was much more than the backbone. Mechanical properties and thermal stability results illustrated that the main aging reasons were the breakage of side chain Si–C bond and the excessive cross-linking reaction of the backbone. This study can provide valuable basis for evaluating degradation mechanism and aging state of the silicone rubber insulation bushing in electric power field.
- Published
- 2016
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