Selecting a polymer insulator with strong lightning resistance, superior pollution flashover performance, and long service life is essential to ensure the safe operation of transmission lines and a reliable power supply.
Composite insulators are composed of an epoxy glass fiber reinforced (E-glass) core rod and silicone rubber as the insulating housing. The epoxy glass fiber core rod offers mechanical strength approximately 1.6–2.0 times that of ordinary steel and 3–5 times that of high-strength porcelain. The three-layer silicone rubber sheds provide excellent resistance to pollution flashover and eliminate common issues associated with ceramic insulators, such as cracking, breakage, or glaze deterioration. In addition, the reduced diameter of the middle shed compared with the upper and lower sheds prevents the formation of a continuous conductive film, thereby minimizing leakage current heating and significantly lowering the risk of flashover.
In the event of a lightning strike on a pin-type composite insulator, the silicone rubber sheds remain intact and only exhibit visible burn marks, which can be easily identified during line inspections. Comprehensive electrical performance tests-including dry flashover, wet flashover, and power-frequency withstand voltage tests after prolonged water immersion-have all met applicable standards. Thermal shock testing was not conducted due to local ambient temperature conditions. The application of pin-type composite insulators is therefore an effective solution for reducing line faults and improving system reliability.
01
Light weight
Composite insulators have a small volume and light weight, approximately 1/5 to 1/7 that of porcelain insulators of the same voltage level, making them easier to transport and install.
02
High mechanical strength
Composite insulators have high mechanical strength, reliable structure, stable performance, and a large safety margin for operation, ensuring the safe operation of power lines.
03
Good sealing properties
Composite insulators are resistant to acids and alkalis, thermal aging, and electrical erosion. They have good sealing properties, ensuring that the internal insulation does not become damp.
04
Good anti-brittleness
Composite insulators have good anti-brittleness and strong shock resistance, preventing brittle fracture accidents.
Application
FAQ
1: Can customers visit and inspect the factory?
Yes. Factory visits, inspections, and third-party audits are warmly welcomed at any time.
2: Do you provide technical support?
Yes. We have dedicated technical engineers to provide professional technical consultation before, during, and after sales.
3: What is your export experience?
Our products have been exported to more than 50 countries and regions, serving customers in power transmission, distribution, railways, and substations.
4: What is your delivery time?
Standard products can usually be delivered within 1–2 weeks based on available materials. Delivery time for customized products depends on order quantity and technical requirements.
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