Explore our premium range of transmission line glass and ceramic insulators manufactured to exceed international IEC, ANSI, and BS standards.
The U70BS toughened glass suspension insulator is a foundational component of modern power grids, engineered specifically to support electrical conductors on high-voltage transmission lines. Under the designation U70BS, the "U" denotes utility suspension application, "70" specifies the mechanical failing load of 70 kN, and "BS" defines the standard ball-and-socket coupling configuration conforming to international IEC guidelines.
Toughened glass provides unique structural and maintenance advantages. It exhibits a high compressive residual surface stress from the tempering process, which prevents micro-cracks from propagating. In the rare event of electrical or mechanical failure, the glass dielectric shell shatters completely into tiny fragments (known as "shattered glass shells" or "shattered caps"). This provides clear, visual identification for line maintenance crews during helicopter or drone surveillance, eliminating the need for expensive, time-consuming diagnostic testing.
Founded in December 2002 with a registered capital of 508 million Yuan, Jiangxi QOCI Electric Co. Ltd is a leading force in high-voltage power transmission line manufacturing. Our state-of-the-art facility in the Industrial Park of Luxi County, Pingxiang, Jiangxi Province, covers an extensive area of 100 mu (70,000 square meters).
By integrating raw material synthesis, precision molding, automated oxygen-fuel glass melting, and strict high-voltage testing protocols, we serve power grids globally, actively participating in the expansion of green energy transmission structures.
The transmission line environment is evolving rapidly. Discover the macroeconomic and environmental drivers steering utilities toward glass insulations.
Unprecedented thermal fluctuations and high wind loads require insulators to offer zero-aging mechanical capabilities. Tempered glass retains its tensile strength over a span of 50+ years, resisting micro-fractures under heavy structural stresses.
Unlike composite (polymeric) insulators that suffer from UV degradation, moisture tracking, and require diagnostic line inspection tools, toughened glass insulators offer the ultimate diagnostic ease: if the shell is intact, it is electrically sound.
As transmission utilities globally adhere to strict environmental targets, the clean composition of glass (silica, soda ash, limestone) is 100% recyclable. This represents a significant ESG improvement over carbon-heavy end-of-life composite compounds.
From industrial salt fog to hyper-arid desert corridors, we engineer glass profiles that match your regional environmental challenges.
Designed with shallow, well-spaced ribs that promote wind and rain self-cleaning. The leakage distance exceeds baseline IEC 60305 dimensions, ensuring high performance in low-to-medium pollution zones.
Characterized by long, deeply recessed ribs that prevent droplet bridging. Boasting a leakage distance/spacing ratio of 3.2, it is highly suited for marine shorelines and heavily polluted industrial clusters.
Eliminates traditional under-ribs while expanding disc diameter. This prevents sand and dust accumulation under high-wind desert scenarios and circumvents the classic problem of winter ice bridging.
Features dual external ribs that minimize particulate settlement. It provides the high creepage distance of an anti-pollution design while utilizing wind flow for effective natural self-cleaning.
A specialized design featuring three separate, tiered umbrella discs. This design extends the creepage path, providing stable electrical insulation over ultra-high-voltage (UHV) spans in damp regions.
Combines the mechanical reliability of toughened glass with the hydrophobic properties of Room Temperature Vulcanized (RTV) silicone. This coating eliminates the need for periodic cleaning in high-contamination sites.
Our top-selling products engineered for heavy-duty transmission lines globally, optimized for mechanical strength and extended creepage performance.
Featuring a 146mm spacing, 320mm disc diameter, and 550mm creepage distance. Perfect for extreme anti-pollution environments.
A versatile utility choice offering a 450mm creepage path. Balances mechanical load rating with weight properties.
Optimized with a shorter 127mm spacing height, allowing higher insulator density per string without exceeding tower clearances.
High mechanical failing load rating of 120 kN, optimized for high tension and crossing spans under heavy wind and ice loads.
Engineered for high tension applications with space constraints, maintaining 120 kN mechanical integrity.
Classic 70 kN profile combined with an extended 550mm creepage distance. Suitable for coastal high voltage grids.
Standard profile suspension insulator, designed for regional substations and medium voltage networks.
70 kN design incorporating anti-pollution sheds, matching the requirements of urban utility expansion.
Quality is the foundation of electrical safety. Our manufacturing lines run automated control systems to ensure zero-defect output.
Global power grid developers and engineering contractors (EPCs) face strict compliance environments. Procuring wholesale high-voltage components requires validation against KEMA, CESI, and national laboratories certifications.
Whether constructing a 500kV AC line across high-altitude mountainous areas or designing a HVDC transmission link through salty coastal fog, components must provide long-term service without breakdown. Our design provides mechanical stability and high leakage paths, lowering overhead maintenance costs.
In the coming years, global transmission grids will undergo structural changes due to renewable energy integration. We are focusing on key development vectors:
Our quality management systems are certified under international standards to guarantee performance safety.
Expert answers addressing the primary concerns of grid engineers, procurement directors, and EPC managers.
Browse our expanded portfolio, including anti-pollution glass, composite suspension, and HV ceramic station insulators.
Stay informed about our latest technical publications, organizational advancements, and global energy exhibition participation.
As the global energy transition accelerates, the importance of electricity, renewable energy, and energy storage technologies is becoming increasingly clear. Meet us at Enlit Africa to discuss transmission solutions.
Having withstood extreme environmental conditions including icing, high altitude, pollution, earthquakes, and typhoons, China's insulator industry has proven its engineering capabilities globally.
On behalf of our team, we encourage you to join us at IEEE PES T&D Conference & Exposition 2026, the powerhouse industry event showcasing high-voltage innovations.
QOCI Electric, a leading global supplier of power equipment and high voltage line solutions, officially confirmed participation to support Middle Eastern transmission system reconstructions.
Collaborating with global power grid authorities, regional utility partners, and heavy raw material suppliers.
