The U70BMA Toughened Glass Insulator represents the pinnacle of modern transmission line engineering. As a core component for high-voltage (HV) and ultra-high-voltage (UHV) systems, the "U70" designation signifies a 70kN electromechanical failing load, providing the structural integrity required for long-span crossings and heavy ice loading conditions. Unlike traditional porcelain, the China-manufactured U70BMA utilizes advanced thermal tempering processes that ensure high dielectric strength and resistance to thermal shock.
A unique benefit of toughened glass is its "self-explosion" characteristic when a fault occurs. This allows maintenance crews to identify failed units from the ground without sophisticated testing equipment.
Inorganic glass compounds do not suffer from the chemical aging seen in polymers. Even after 40 years of field service, U70BMA units maintain their original mechanical and electrical properties.
The smooth, non-porous surface of the U70BMA profile facilitates natural self-cleaning by wind and rain, drastically reducing the risk of pollution flashover in coastal and industrial areas.
Jiangxi province, specifically the Luxi Industrial Park, serves as the global epicenter for insulator production. Jiangxi QOCI Electric Co. Ltd leverages a highly integrated supply chain that spans from raw material quartz procurement to the final "Total Oxygen Kiln" firing process. This vertical integration allows for unparalleled quality control and cost-efficiency.
Our facility utilizes the latest total oxygen combustion kilns, reducing energy consumption by 30% while ensuring glass homogeneity that exceeds IEC 60305 standards.
Precise molding technology ensures that every U70BMA unit meets exact dimensional tolerances, critical for ball-and-socket connectivity in long strings.
Every unit undergoes routine electrical and mechanical tests, including steep-front wave impulse tests and thermal-mechanical performance verification.
Global power grids are facing extreme weather events. The U70BMA series is designed to handle wind speeds exceeding 150 km/h and heavy saline fog. For desert environments, our Open Profile and External Shed designs prevent sand accumulation, solving the "ice-bridging" and "dust-layering" issues that lead to catastrophic outages.
For ultra-polluted zones near chemical plants or ocean sprays, our Silicone-coated Glass Insulators (RTV) offer the mechanical reliability of glass with the chemical hydrophobicity of polymers. This "hybrid" solution eliminates the need for expensive manual cleaning, reducing operational expenditure (OPEX) by up to 60% over the product lifecycle.
Founded in 2002, Jiangxi QOCI Electric Co. Ltd covers 100 mu with a 70,000 m² plant area. With 53+ engineering technicians and a commitment to green energy, we serve the world-class power grid with dedication.
Modern utilities in Africa, Southeast Asia, and South America are shifting heavily toward toughened glass due to lower lifetime costs. The U70BMA is particularly popular for 66kV and 132kV transmission lines. In industrial regions of the Middle East, our Anti-Fog profiles are essential for grid stability against salt-spray and sandstorms.
We are currently researching the integration of fiber-optic sensors into glass insulator strings to allow for real-time monitoring of leakage currents and tension levels, bridging the gap between passive insulation and active grid management.
