As the global energy transition accelerates, the demand for high-reliability transmission components has reached an all-time high. The U210BLA (210kN) Toughened Glass Insulator stands at the forefront of this industrial revolution, providing the mechanical strength and dielectric performance required for 330kV, 500kV, and Ultra-High Voltage (UHV) AC/DC lines.
International utilities (such as Enel, State Grid, and Eskom) are increasingly shifting from traditional porcelain to toughened glass insulators. The primary drivers are the "self-shattering" property which allows for easy visual inspection, and the superior resistance to thermal aging in tropical and desert climates.
We provide comprehensive solutions for high-pollution coastal areas and high-altitude inland regions. Our U210BLA series incorporates advanced aerodynamic shed designs to prevent salt-fog accumulation and minimize leakage currents, ensuring grid stability under extreme weather conditions.
Every U210BLA unit manufactured in our Jiangxi factory undergoes rigorous testing according to IEC 60305, IEC 60383, and ANSI C29.2 standards. With a registered capital of 508 million Yuan, our commitment to quality is backed by massive industrial capability.
Plant Area (m²)
Annual Output (Tons)
Eng. Technicians
National Patents
Jiangxi QOCI Electric Co. Ltd has pioneered the transition from standard glass formulas to high-purity, low-expansion borosilicate-enhanced toughened glass. The U210BLA model represents a milestone in technical achievement:
Higher leakage distance than IEC 60305, wind-cleaned ribs.
Long under-ribs for coastal salt-fog environments.
Desert-optimized design to prevent sand accumulation.
Ultra-High Voltage (UHV) specific for maximum creepage.
Our factory utilizes a state-of-the-art Total Oxygen Kiln system, which ensures the glass melt is perfectly homogeneous and free of microscopic impurities. This is critical for the U210BLA series, as even the smallest bubble can compromise the mechanical integrity under 210kN of tension. The forming press and subsequent tempering process create a residual stress layer that makes the glass 5-7 times stronger than annealed glass.
Forming Press
HV Testing
Advanced Kiln
With attendance at major global trade shows like Enlit Africa and IEEE PES T&D, Jiangxi QOCI provides local technical support across five continents. We offer customized packaging for sea freight and 24/7 technical consulting for string design and insulation coordination.
Certificates: ISO 9001, ISO 14001, OHSAS 18001, and KEMA certified type tests.
U210BLA toughened glass insulators offer several advantages: they are lighter, have a predictable "self-shattering" failure mode which simplifies maintenance, and do not suffer from internal puncture or "hidden cracks" that are common in porcelain.
Thanks to our 39,000-ton annual capacity and highly automated lines, standard U210BLA orders are typically fulfilled within 30-45 days, depending on current backlog and shipping logistics.
Yes, while IEC 60305 is our primary standard, our U210 series is fully compatible with ANSI M&E (Mechanical and Electrical) strength requirements and fitting dimensions for North American markets.
Every single insulator disc undergoes a routine thermal shock test, mechanical proof load test, and a high-voltage spark test before leaving the factory. We also conduct steep-front wave tests on sample lots.
