Silicone rubber is widely used as the insulator for outdoor electrical equipment because of it's advantages such as light weight, compactness and easy to handle compared with porcelain one. However it is still not clear about their long-term performance under heavy contaminated conditions. To evaluate the long-term performance, exposure test under voltage application for 7 years were carried out using Outdoor cable termination made of silicone rubber. The results showed that the Silicone terminations approximately maintain the initial properties in electrical and physical characteristics.
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