Glass Insulators
Glass power line insulators are electrical insulators made from toughened or tempered glass. They are primarily used in high-voltage transmission and distribution lines to support conductors and prevent current leakage to the supporting structures or ground.
ZheXi Electric Power offers a wide range of glass insulators for sale, including transparent glass insulators designed for optimal visibility and standard glass insulator models that meet international quality benchmarks.
As leading glass insulator suppliers, we leverage cutting-edge engineering and specialized glass chemistry to deliver durable, high-strength products suitable for UHV applications.
| Parameter | Value Range |
| Insulation Resistance | >10,000 MΩ (at 20°C, dry conditions) |
| Frequency Breakdown Voltage | 30–200 kV (50 Hz, 1 min withstand) |
| Lightning Impulse Withstand | 100–300 kV (1.2/50 µs waveform) |
| Power Frequency Withstand | 30–150 kV (1 min, RMS) |
| Radio Interference Voltage | <500 µV (at 1.1× rated voltage) |
| Corona Quenching Voltage | >25 kV (no visible corona above) |
| Tensile Strength | 40–120 kN (model-dependent) |
| Compression Strength | 120–300 kN |
| Bending Strength | 25–70 kN |
| Weight | 2.5–8.5 kg (lightweight design) |
| Creepage Distance | 300–450 mm (anti-pollution models) |
| Operating Temperature | -40°C to +80°C |
| UV Resistance | No degradation after 35+ years |
| Pollution Resistance | Suitable for heavy pollution (Class IV) |
| Salt Spray Resistance | Withstands 1000+ hours (ASTM B117) |
| Altitude Tolerance | Up to 5000 meters |
Specific needs can be customized by our professional team.
Divided by function into standard type, anti-pollution type, DC type, etc., the anti-pollution type enhances its anti-pollution flashover capability by increasing the umbrella skirt design, suitable for areas with heavy pollution.
Common models include U40B, U70B, U70BP, PSD70E, U120B, and U120BP.
| Model | Type | Key Features |
| U70BP | Anti-Pollution | 450 mm creepage, 70 kN tensile strength |
| U120B | Standard | 120 kN tensile, cylindrical head design |
| PSD70E | DC Type | Optimized for HVDC lines, corrosion-resistant |
| U70B | General Use | 70 kN tensile, cost-effective |
| U120BP | Anti-Pollution | 120 kN tensile, heavy-duty pollution areas |
▷ Pin Type Insulators
Mounted on a pin on the cross-arm of a pole.
Used for low- to medium-voltage lines.
▷ Suspension Insulators
Hang from the conductor using a string of insulator units.
Ideal for high-voltage transmission lines.
▷ Strain / Tension Insulators
Designed to handle mechanical tension at dead ends or corners.
▷ Post Insulators
Provide vertical support for conductors in substations and switchgear.
Our cement-bonded assembly, featuring metal caps, tempered glass, and galvanized steel footings, ensures robust sealing and corrosion resistance, making our anti fog glass power line insulators ideal for harsh climates. The suspension glass insulator is a crucial insulating component used in high-voltage and ultra-high-voltage transmission lines. It is primarily composed of a metal cap, tempered glass piece, and steel foot, which are bonded together using a cement adhesive. It possesses the following characteristics:
● These assemblies exhibit zero leakage under pressures up to 10 MPa, surpassing IEC leakage resistance standards and guaranteeing long-term performance.
● Galvanized steel components comply with ISO 1461 for enhanced corrosion protection, while toughened glass parts resist ion conductivity and moisture ingress.
● With a maintenance-free lifespan exceeding 35 years, these glass power line insulators for sale provide cost savings and reliability over multiple decades.
● Self-destruction at zero value: Upon failure, the glass pieces will automatically shatter, facilitating rapid identification through ground or aerial observation, eliminating the need for individual piece inspection and reducing maintenance costs.
● Strong weather resistance: Excellent arc resistance and vibration resistance, with a smooth surface even after being burned by lightning, and stable electromechanical performance;
● Good self-cleaning ability, easy to clean after rain, and no signs of aging after 35 years of operation.
● Structural optimization: The cylindrical head design is adopted, featuring light weight, high mechanical strength, and a large creepage distance, which can reduce metal usage and line cost.
● Tailored designs allow adjustment of creepage distance, mechanical load ratings, and dimensions to match bespoke project requirements.
● Material optimization services include specialized coatings for extreme conditions, and we offer OEM/ODM branding and packaging solutions.
● Rapid prototyping with 3D modeling ensures sample delivery within 30 days, accelerating project timelines and reducing glass insulators for sale lead times.
It is primarily used in high-voltage (such as 110kV and above) and ultra-high-voltage AC and DC transmission lines, serving the functions of conductor suspension and insulation.
It is also suitable for use in substations, electrified railway catenary systems, and other scenarios, particularly excelling in harsh environments such as polluted areas, high salt spray conditions, or high altitudes.
ZheXi's transparent glass insulators further facilitate visual inspections, aiding maintenance teams in rapid fault detection.
● ZheXi Electric Power provides pre-sales technical consultation, including CAD drawings and project planning, to ensure seamless integration of our glass insulators for sale into your systems.
● Our on-site installation guidance and comprehensive training programs minimize commissioning time and optimize operational safety.
● After-sales service includes a 10-year warranty and 24/7 global technical support to uphold our commitment to trustworthiness and customer satisfaction.
Contact ZheXi Electric Power to experience our industry-leading glass insulators for sale.
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Application
Our company's products are sold well in North America, Latin America, Southeast Asia, Africa, the Middle East, etc., and we have established long-term and stable cooperative relations with many international customers.
