RTV Toughened Glass Insulator

RTV Toughened Glass Insulator

RTV Toughened Glass Insulators are traditional toughened (tempered) glass insulators that are additionally coated with RTV (Room Temperature Vulcanized) silicone rubber. The RTV coating significantly enhances the insulator’s performance in polluted or coastal environments by reducing surface leakage current and preventing flashover. It‘s a reliable, high-performance solution for maintaining safe and efficient operation of power lines in polluted environments, providing a valuable alternative to standard toughened glass or porcelain insulators in areas at high risk of contamination-related problems.
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Key Features and Advantages

  • The coating allows the insulator to resist pollution-related flashovers and reduces the need for periodic washing in areas with heavy contamination.
  • Insulators retain all the inherent mechanical and visual benefits of toughened glass, such as high mechanical strength, resistance to aging, and easy inspection for defects.
  • These insulators can be supplied fully coated or with the coating only on critical areas (such as the bottom surfaces), both showing significant improvement over uncoated glass insulators in field tests.
  • Products are available for high-voltage applications (10kV–1000kV), with profiles specifically designed for coastal or industrial use. njrecgroup

Performance

•  RTV-coated glass insulators demonstrate a substantial reduction in leakage current, even under severely polluted and high-humidity conditions, thus suppressing discharge activity and greatly lowering the risk of insulator flashover.

•  Comparative studies show that "half-coated" insulators (coated only on surfaces where pollution tends to accumulate) perform nearly as well as fully coated models, optimizing material use and cost.

•  The coating quality is highest when applied in the factory, ensuring strong bonding and optimal thickness.


Strength grade of glass insulators 160kN 210kN 300kN 420kN 550kN
Weight of glass parts 5000g 5200g 6000g 8000g 9000g
Surface area of insulating parts 2800cm2 3000cm2 3500cm2 4400cm2 4900cm2
unit area loading 1.79g/cm2 1.75g/cm2 1.72g/cm2 1.82g/cm2 1.84g/cm2
Coating thickness (Suggested) 0.7±0.1mm 0.7±0.1mm 0.8±0.1mm 1.0±0.1mm 1.0±0.1mm
RTV Glass Insulators RTV coated Glass Insulators

How RTV Coatings Work and Their Application?

The effectiveness of RTV coatings stems from their hydrophobicity and hydrophobic migration.
Hydrophobicity: A clean RTV surface naturally repels water, causing moisture to bead up rather than spread out.
Hydrophobic Migration: When the coating surface becomes contaminated, low molecular weight (LMW) silicone chains within the coating migrate through the pollution layer. This gives the dirt itself water-repellent properties, preventing it from becoming a conductive film even in fog or light rain.


RTV (Room Temperature Vulcanizing) silicone rubber coatings are applied to toughened glass insulators to solve pollution problems. These coatings transform the insulator's surface from hydrophilic to hydrophobic, preventing conductive water films and significantly reducing the risk of flashovers in harsh environments.

Company profile

Who We Are?

Nooa Electric Co., Ltd. - Chinese professional electrical insulators manufacturer with 21+ experience, covering an area of 70,000 square meters, and construction area is 50,000 square meters. There are more than 200 employees, including 25 technicians. The production capacity 3500000 pieces per year, and now setting up the new kiln and lines up to 10500000 pieces per year. We have been specialized in research and development of latest high-strength functional glass and power transmission insulators, which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China, and is a participating unit of product standard formulation of the national electrical insulator standard committee.


What We Have?

Certificates & Reports: INTERTK, SGS, BV Certificates,Type Test Certificate.

Main Electric Insulators : Standard-type glass insulator (u40(ctv175)/u70(ctv254, ps70e)/u120/u160/u210/u300) , antipollution-type glass insulators (u120bp/u160bsp/u210bp), aerodynamic type glass electrical insulators (ug70bsa/u100bsa/u120bla), multi-umbrella type electric insulators, ground-wires type glass power line insulators (u70cn/u100cn/u120c), post insulator for line, pin glass insulator. Products are mainly used for transmission line insulation, suspension, support, tension conductors. They are divided into 5 major series: The standard type glass insulator 40-550kn, filth-resistant type glass insulators 70-420kn, aerodynamic type glass electrical insulators 120-300kn, multi-umbrella type electric insulators 120-300kn, and ground circuit type high voltage insulators, able to be used for line voltage from 10kv～1000kv.


Core Technology:

Automation Equipment: Siemens fully automatic feeding, stamping, temperature equalization, tempering, hot and cold shock control system.
Independent Product Model: U160BP/146/380/450, U160BP/155/380/450, U210BP/170/420/550 and U300BP/195/420/550.
Advanced Klin: Germany's new generation kiln control system, equipped with brand-new sensors and actuators, and equipped with a high-precision automatic batching system.
Qualification: Passed the quality, environment and occupational health system certification and obtained a number of invention patents.


Goal:

To be the world's largest glass insulators manufacturer.

Electric Insulators Certificates

Are u the electric insulators factory or trading company?
China Leading Electric Insulators Factory founded in 2002
What're your main power insulators?
Powerline Electric Insulators (glass insulators, porcelain insulators, composite insulators ), the fittings and hardwares of all kinds for high-voltage applications and related products.
Can I get some glass insulators samples?
Yes, powerline glass insulator sample order is available for quality check and market test.
What's your payment terms?
We usually accept all kinds of payment terms, T/T, L/C, Western Union.
How can you control your glass power line insulator quality?
For each glass insulator production processing, we have a complete QC system for the chemical composition, physical and electrical properties. After production, all glass power line insulators will be tested according to related standards, and the ex-factory test reports will be sent along with shipment documents.
Does your company accept customization?
We accept OEM service.
What's your warranty terms?
We offer 24 months warranty terms.
Do you have glass electrical insulators in stock?
Depends on your request, we have standard models (CTV254 & CTV175, U40B U70B U120B U160BL U240B U300B ) in stock. Some special product and big order will be newly produced according to your order.

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Contact Us

Room 2221, 22nd Floor, Building 1, Wanxiang Times Garden, No. 676, Renmin East Road, Furong District, Changsha City, Hunan Province, China
Phone : 0086 186-848-89358
Whatsapp : +8615274981317  
Email : info@nooaelectric.com
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