Explore our premium standard and anti-pollution toughened glass insulators engineered for high voltage applications worldwide.
Founded in December 2002 with a registered capital of 508 million Yuan, Jiangxi QOCI Electric Co. Ltd stands as a premier manufacturer of high-strength glass insulators. Our manufacturing facility spans an impressive area of 70,000 square meters in Luxi County Industrial Park, Pingxiang, Jiangxi Province. We specialize in standard, anti-pollution, aerodynamic, double-shed, and triple-shed toughened glass insulators designed for low, high, extra-high, and ultra-high voltage AC and DC transmission systems.
By leveraging advanced automation, state-of-the-art oxygen-rich kilns, and comprehensive testing methodologies, we supply top-tier power companies and infrastructure networks worldwide. Our core principles of Innovation, Quality, and Service guide our commitment to ensuring global electrical transmission system stability and safety.
Navigating global grid reliability challenges using advanced toughened glass insulation tech
Faced with volatile supply chains and aging electrical infrastructure, power utilities require reliable and certified manufacturers. U70BLP glass insulators, with a rated mechanical load of 70kN, meet international standards (IEC 60305, IEC 60383). These products are critical components for high-voltage substations and long-distance transmission projects, providing durable performance in areas with high air pollution and salt spray.
Areas with industrial emissions or coastal winds face salt spray and dust build-up. The U70BLP anti-pollution model features a deep profile design that extends the creepage distance (146/320/550 mm), preventing surface flashover. Additionally, Room Temperature Vulcanized (RTV) silicone-coated glass insulators provide hydrophobic properties that resist leakage currents and minimize maintenance overheads.
Toughened glass provides notable advantages over alternative insulation options. In the event of internal stress or a power surge, toughened glass fractures in a controlled, visible manner. This "self-shattering" behavior simplifies line inspections, allowing utility operators to locate and replace faulty units quickly, avoiding costly outages.
Tailored structural designs to withstand severe environmental factors, line tensions, and pollution loads
Features shallow, widely spaced ribs that are easily self-cleaned by wind and rain. The leakage distance exceeds baseline specifications in IEC 60305, making it suitable for clean or low-pollution regions.
Designed with deep and widely spaced under-ribs to prevent arc bridging in humid, saline, or dusty areas. This profile provides a high leakage-to-spacing ratio of approximately 3.2, making it suitable for marine or heavily industrial environments.
Lacks under-ribs and features an extended disc diameter to prevent the accumulation of dust and sand. Excellent for desert transmission paths subject to windstorms, and effective for dead-end strings to reduce ice bridging.
Equipped with dual external ribs that limit particulate accumulation and facilitate manual cleaning. This design delivers a creepage rating equivalent to anti-fog profiles, performing well in saline soils and heavy industrial zones.
Constructed with three distinct umbrella discs on a single body. This design provides extended creepage distances and self-cleaning performance, making it suitable for ultra-high voltage (UHV) transmission networks in challenging terrains.
Integrates internal or external hardware to connect transmission structures directly to ground wires. This profile safely routes lightning surges, protecting downstream equipment.
Our products are mainly high-strength glass insulators used in low voltage, high voltage, ultra-high voltage, extra-high voltage AC (DC) electric transmission lines.
Explore our manufacturing facility and quality assurance processes
Our commitment to quality is backed by international test certifications and quality system approvals
Collaborating with global power grid operators and industrial partners to deliver reliable grid operations.
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Answers to common questions from grid engineers and procurement managers regarding toughened glass insulators
The U70BLP is an anti-pollution, double-shed toughened glass disc suspension insulator designed for high voltage lines. It features a rated mechanical load of 70kN. The structural dimensions typically include a spacing of 146mm, a nominal disc diameter of 320mm, and a creepage distance of 550mm, ensuring performance in polluted environments.
Toughened glass provides high mechanical strength and thermal stability. In the event of damage, it is designed to shatter into small, harmless fragments while the core remains structurally intact. This "self-shattering" mechanism simplifies inspections by allowing maintenance crews to visually spot broken insulators from the ground, eliminating the need for line climbing measurements.
All QOCI glass insulators, including the U70BLP series, are designed, manufactured, and tested in compliance with IEC 60305, IEC 60383, and ANSI specifications. Quality control procedures include mechanical fail-safe testing, thermal shock testing, and high-voltage steep-front impulse testing.
With an annual capacity of 39,000 tons, QOCI maintains a consistent supply chain for large grid projects. Standard lead times range from 4 to 8 weeks, depending on quantity. We also offer factory-applied RTV silicone coatings for installations in heavy chemical or salt-fog environments.
Detailed product specifications and procurement options for our high voltage toughened glass isolators.
