Composite insulators are electrical insulation materials used in power transmission lines, typically composed of a core rod, an outer sheath, and metal fittings. They can be broadly categorized as follows:
There are several types of composite insulators,Composite Suspension Insulator,Composite line post insulators,Composite pin-type insulators,CompositeCross-arm Insulator，composite post insulator，Composite Anti-Wind Insulator.
Composite insulators offer several advantages over traditional porcelain or glass insulators. They are lightweight, easy to install, and have a higher mechanical strength, making them ideal for use in harsh outdoor environments. They are also resistant to moisture, UV radiation, and pollution, which can cause insulators to degrade over time. This helps to extend the service life of composite insulators and reduces maintenance costs.
GOTO ELECTRICALCO,LTD. specializes in producing high-quality electrical equipment to meet the needs of customers fromvarious industries, and is committed to exceeding expectations in terms of performance and reliability.
GOTO provides a comprehensive range of electric power transmission and distribution products designed to meet all your transmission, distribution an guying needs.
A composite insulator is a high-voltage insulating device made of a fiberglass core rod, polymer housing (like silicone rubber), and metal end fittings. This composite type insulator offers high mechanical strength, lightweight design, and excellent pollution resistance. Composite polymer insulators are widely used in transmission and distribution lines due to their durability and performance in harsh environments.
A composite type insulator uses a fiberglass core with composite insulator material like silicone rubber and metal end fittings, offering high mechanical strength. A polymer type insulator is fully made of polymer without a core—lighter and more corrosion-resistant. Composite is stronger; polymer is more compact and cost-effective. Choice depends on application needs.
Composite insulators are tested for strength, insulation, and durability. Key tests include:
Mechanical: Tensile, bending, and impact tests
Electrical: Power frequency and lightning impulse tests
Environmental: Salt fog, UV aging, and hydrophobicity tests
Structural: End fitting strength and sealing tests
Quality checks: Visual inspection and material property testing
All tests follow IEC 61109 standards to ensure reliable performance in harsh environments.
Our composite insulators are certified with:
ISO 9001 (Quality Management)
ISO 14001 (Environmental Management)
OHSAS 18001 (Occupational Health & Safety)
Type Test Certification by XIHARI (Xi’an High Voltage Apparatus Research Institute), with accreditations including MA, AL, and CNAS.
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