Using a specialised spray coating technique, RTV (Room Temperature Vulcanizing) silicone coating is applied to the electrical insulators surface to prevent leakage currents, discharges, and pollution flashovers. This silicone layer provides a hydrophobic surface, reducing the negative effects of contamination while improving electrical properties and reducing leakage currents in polluted areas. RTV silicone insulator coating provides several advantages, which include:
- Resistance to Moisture
RTV silicone is extremely resistant to moisture, chemicals, and UV radiation, thereby protecting electrical components from water damage, corrosion, and moisture-induced short circuits.
- Thermal Stability
RTV silicone coatings can withstand high temperatures while maintaining their insulating properties, making them suitable for use in both high-temperature environments and thermally stable applications. RTV phenyl silicone rubber vulcanised with polysilazane retained its shape until the ablation temperature reached 800 °C, indicating that RTV phenyl silicone rubber is highly thermally stable.
- Radiation- and UV-resistant
Many RTV silicone coatings are designed to resist degradation from ultraviolet (UV) radiation, making them ideal for outdoor applications where sunlight is a concern. Furthermore, RTV is biocompatible, suitable for use in parts that come into contact with humans, and provides excellent electrical insulation. Pour RTV silicone into the mould.
- Application Simplicity
RTV silicone coating has several benefits, including ease of application and processing. These coatings can be applied in a variety of ways, such as brushing, spraying, or dipping, and cure at room temperature, eliminating the need for high-temperature curing processes. Furthermore, RTV silicone can also be easily applied to glass Insulator coatings.
- Defence Against Environmental Elements
RTV silicone coatings provide moisture resistance, chemical resistance, UV resistance, and thermal stability, which helps protect coated components from a variety of environmental factors such as humidity, temperature extremes, and exposure to harsh chemicals.
- Resistance to Chemicals
RTV silicone sealants offer exceptional thermal stability, flexibility, adhesion, weathering, UV and radiation resistance, and chemical resistance. They provide resistance to oils, solvents, and acids, increasing the durability and longevity of coated components and making them a valuable product in various industries.
- Flexibility
Flashover Insulators RTV Coating does not shrink when it dries. It is highly chemical and temperature-resistant, so it retains flexibility after curing. It remains flexible over a wide temperature range, allowing coated components to withstand thermal expansion and contraction without cracking or losing adhesion.
- Adhesion
RTV silicone coatings are effective on various substrates like metals, plastics, and ceramics, ensuring long-term adhesion. Common RTV silicones include acetoxy cure silicone and neutral cure (oxime) silicone. Although silicone cured with acetoxy has a quick cure rate and tack-free duration, metals are corroded by it.
- Dielectric Characteristics
RTV silicone coatings, particularly RTV4 and RTV5, are highly effective in electrical insulation due to their high dielectric strength, thermal stability, improved thermal conductivity, excellent FPI and FGI values, and excellent dielectric properties, making them ideal for fire-resistant outdoor electrical insulation.
Conclusion
Overall, RTV Silicone Electrical Insulator Coatings are a versatile solution for protecting high-voltage electrical components, offering strong insulation, durability, and dependability in a variety of applications and environments.
Midsun IKM offers a variety of RTV silicone coatings for superiorInsulator flashover protection in highly contaminated environments, including high-voltage insulation.
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