Explore our core selection of toughened glass and post insulators certified under international IEC and ANSI standards.
An in-depth look at the role of Glass Isolator U160bl in stabilizing global energy networks under modern demands.
In an era of rising global temperatures, intensifying storms, and the massive integration of renewable energy sources, grid infrastructure must withstand extreme weather patterns. Toughened glass insulators like the U160bl series offer a structural lifespan exceeding 50 years. Unlike composite or porcelain alternatives, tempered glass shows no signs of aging under intensive UV exposure or severe weather.
Furthermore, toughened glass maintains high residual mechanical strength even in the rare event of shell breakage. When the glass shell is shattered (often due to lightning strikes or extreme external forces), the stub remains mechanically coupled, preventing line drops (catastrophic dropping of the high-voltage conductor) and keeping the grid secure. This feature simplifies maintenance since visual detection of damaged components from ground level is instantaneous—eliminating the need for complex, manual, and expensive zero-value insulator testing.
The international demand for high-strength insulators is rising due to long-distance cross-border transmission networks and massive grid extensions in Asia, Africa, and the Americas. Toughened glass insulation leads the market in performance for AC and DC transmission systems due to its high dielectric strength, low thermal expansion coefficient, and easy inspection.
Manufacturers in China, specifically situated within specialized industrial centers like Pingxiang, Jiangxi Province, have optimized global supply chains. By integrating state-of-the-art automated production, local factories deliver bulk volumes that match rigorous grid constraints in Europe, North America, and high-growth markets in developing countries.
The U160BL represents a specialized class of suspension cap-and-pin toughened glass insulators. Designed under standard configurations (often combined into long suspension strings), here is a summary of the common physical and mechanical baseline features:
| Parameter Profile | Standard Metric values | Compliance Reference |
|---|---|---|
| Electromechanical Failing Load | 160 kN | IEC 60305 / IEC 60383 |
| Structure Diameter (D) | 280 mm to 300 mm (depending on anti-pollution sheds) | IEC 60305 |
| Spacing Height (H) | 146 mm / 155 mm / 170 mm | IEC 60305 |
| Nominal Creepage Distance | 380 mm to 550 mm (Standard vs. Anti-pollution design) | IEC 60815 |
| Ball & Socket Coupling Size | 20 mm | IEC 60120 |
| Puncture Resistance in Air | > 130 kV | IEC 60383 |
Jiangxi QOCI Electric Co. Ltd was founded in Dec. 2002, with registered capital of 508 million Yuan. The Corporation is located at Industrial Park, Luxi County, Pingxiang, Jiangxi Province, covering an area of 100 mu.
We actively participate in the construction of green energy globally. With specialized engineering personnel and advanced R&D patents, we strive to serve the electric power industry and guarantee grid safety through durable structural design.
Serve the world-class power grid with dedication and active green energy participation.
Responsibility is the absolute guarantee of our product quality and durability.
Ensuring operational reliability in highly-polluted zones, sub-zero regions, desert storms, and industrial sectors.
Maintains reliable performance in steep high-altitude valleys, wind tunnels, and moisture-laden zones.
Designed for low voltage to high voltage, EHV, and UHV alternating and direct current networks.
Meets the dynamic electrical load and insulation demands of substation gantries and transmission spans.
Supports marine power cables landing interfaces, heavily polluted mineral refining areas, and rail transit.
Optimized profiles designed to combat distinct environmental challenges from heavy fog to dry desert sandstorms.
The characteristic of the standard profile is that the leakage distance is higher than the value indicated for standard insulators in IEC 60305. The insulation part is designed with shallow and well spaced small ribs, which can be effectively self-cleaning by wind or rain.
The fog type profile is characterized by long and widely-spaced under-ribs so as to avoid arc bridging between adjacent ribs. It features a leakage distance/spacing ratio of around 3.2 and is particularly effective in coastal areas (Salt fog) as well as in polluted areas where a higher specific leakage distance is required.
Design of insulating part with open profile is marked by absence of under-ribs and extended diameter of disk, with no under-ribs so as to avoid the accumulation of solid pollution deposits (dust, sand) on its lower surface. Open profile reduces pollutant accumulation on the surface. This design is effective in desert areas with wind and sand storm also can solve ice-bridging problems.
The design of the insulation part has two external ribs. The elimination of the under-ribs reduces pollution build-up, and the surface of the insulator can self clean by strong winds. And facilitate manual cleaning when necessary. This profile provides a leakage distance equivalent to the anti pollution profile.
Triple-shed Type glass insulator is a key component in transmission lines, characterized by three layers of umbrella discs separated from each other on the insulation body. Thanks to this open shed design, they not only achieve self-cleaning during wind and rain, but also provide a longer creepage distance.
By connecting internal or external metal accessories (such as steel feet and flanges) to the grounding wire, reliable grounding can be achieved. The grounding function effectively guides lightning current, reduces line lightning damage, and protects the safety of lines and equipment.
Silicone-coated insulators offer an excellent alternative which guarantees optimum performance for high voltage overhead lines in areas with heavy pollution. They minimise leaking currents and thereby reduce operation and maintenance costs. The product used to coat the insulators is Room Temperature Vulcanization (RTV) silicone which contains mineral fillers embedded in the silicone itself. This silicone increases the hydrophobic nature of the insulator’s surface. Furthermore, the fillers absorb the energy of any possible electric arcs and serve to protect the integrity of the coating.
A precision-driven production process, featuring state-of-the-art oxygen kilns, forming presses, and high-voltage testing lines.
Aligning with international engineering codes to support the next generation of smart power transmission networks.
Exporting glass insulators to international grids requires adherence to strict global certification schemes. At Jiangxi QOCI Electric, our U160bl series is tested under strict parameters matching IEC 60305 (characteristics of insulator units of the suspension type), IEC 60383 (insulators for overhead lines with nominal voltage above 1000V), and ANSI C29.2b standards.
Each manufacturing batch undergoes tests including thermal shock testing, mechanical load-withstand tests, steep-front wave impulse tests, and hot-dip galvanizing thickness checks on the steel pins and cast iron caps. This level of quality management prevents mechanical failure under continuous load.
As grids transform into integrated smart networks, the role of structural insulators is shifting. The technology roadmap for glass insulators focuses on two main innovations:
Technical guidance and engineering answers for procurement managers and system designers.
Follow Jiangxi QOCI Electric's presence at international energy events and exhibitions.
As the global energy transition accelerates, the importance of electricity, renewable energy, and energy storage technologies is becoming increasingly critical.
Having withstood extreme environmental conditions including icing, high altitude, pollution, earthquakes and typhoons, China’s insulator industry has matured into a reliable global supplier.
On behalf of our team at Jiangxi QOCI Electric, we invite you to join us at the IEEE PES T&D Conference & Exposition, the powerhouse utility event.
Jiangxi QOCI Electric also confirmed attendance at the 11th Iraq Energy Exhibition in December 2025.
A comprehensive range of high-voltage transmission glass, ceramic, and composite insulator profiles.
Cooperating with international industrial partners to support the expansion of global grids.
