RTV Silicone Coated Glass Insulator

Glass insulators are electrical insulation devices used in overhead transmission and distribution lines. They utilize the high resistivity and high dielectric strength of glass to prevent current flow, while the shed structure increases the creepage distance, improving protection against flashover. Their main functions are: supporting the conductors, electrically isolating them from the towers or crossarms, and preventing current leakage to the grounding structure. Glass insulators are a traditional, mature, and reliable transmission line insulation product, widely used in transmission lines worldwide, and still holding a significant market share, especially in medium and high voltage lines.

Glass insulators are manufactured at high temperatures by melting and blending raw materials such as quartz sand and lime. The molten glass is then poured into a mold and rapidly cooled in a controlled process known as toughening. This rapid cooling creates internal compressive stresses that significantly increase the mechanical strength of the glass. As a result, a toughened glass insulator is formed.

HTV (High Temperature Vulcanized) silicone rubber coating is primarily used to improve the operational performance of glass insulators in harsh environments, especially in heavily polluted or humid areas.

1.Improved Hydrophobicity
HTV silicone rubber has excellent hydrophobic properties, causing moisture to form droplets rather than a water film, thereby:
Reducing surface leakage current
Lowering flashover risk
Improving operational safety

2. Enhanced Anti-Flashover Capability
In heavily polluted areas such as coastal areas, industrial zones, and dust storm zones:
Salt spray and dust adhere to the insulator surface
Easily forming conductive paths after becoming wet
HTV coating can:
Inhibit conductivity after contamination and moisture
Extend cleaning intervals
Improve line reliability

3. Improved Aging Resistance
HTV silicone rubber / UV resistant
Electrolytic corrosion resistant
High and low temperature resistant
Extends the service life of insulators.

4. Improved Operational Stability
Particularly suitable for:
Coastal areas with high salt spray
Heavy industrial pollution areas
High humidity areas / High altitude areas

1.What's your main products?
High Voltage Insulator / Medium Voltage Insulator:Suspension Polymer Insulator, Post Line Polymer Insulator, Substation Insulator, Railway Insulator, Pin Insulator.

2.Do you have a catalog? Could you send me your catalogue?
We have a catalogue. Please contact us, we can send you product catalog online or email.

3.Can your factory produce according to customer's requirements?
Yes,customized products are available.

4.What's your packing standard?
Usually we use standard cartons for packing or according to customers' requirements, main package is plywood cases .

5.What after-sales service do you provide?

12 months after-sales service available.

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