High-voltage insulating silicone rubber provides a "reliable insulation solution" for power equipment in extreme environments, thanks to its exceptional high/low-temperature resistance and mechanical strength. In Arctic regions (e.g., the Arctic Circle), traditional insulators risk cracking due to low-temperature embrittlement, while silicone rubber remains flexible at -60℃ (Tg as low as -120℃), ensuring insulator functionality in severe cold. For example, a Russian Arctic substation using silicone cable accessories retained 90% tensile strength after -50℃ testing, compared to 60% for EPDM rubber.

In high-temperature industrial settings (e.g., steel mills, nuclear plants), silicone rubber’s heat resistance shines. With a continuous service temperature of 180℃ and short-term resistance exceeding 300℃, it resists decomposition into conductive impurities. A nuclear plant’s main transformer bushing, insulated with silicone rubber, showed no significant decline in dielectric strength (≥20kV/mm) or mechanical properties after 10 years, unlike epoxy resin, which developed partial discharges and cracks.

Additionally, silicone rubber’s tear resistance (tear strength >50kN/m) suits vibration-prone applications. In wind turbines, insulated sleeves connecting blades to towers endure high-frequency vibrations and bending stresses. By optimizing formulations (e.g., adding fumed silica), silicone sleeves extend fatigue life by over 3x compared to conventional rubber, reducing downtime from insulation failures.

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