Serve the world-class power grid with dedication — Actively participate in the construction of green energy
World-class power grid solutions & green energy construction
Responsibility is the guarantee of quality in every insulator
Serve the electric power industry & ensure power grid safety
Jiangxi QOCI Electric Co., Ltd was founded in December 2002, with a registered capital of 508 million Yuan. Located at the Industrial Park, Luxi County, Pingxiang, Jiangxi Province, the company covers an area of 100 mu. As a leading Chinese manufacturer of toughened glass insulators, QOCI Electric delivers fast delivery times with competitive pricing to global power grid projects across more than 50 countries.
Committed to serving the electric power industry, QOCI Electric integrates advanced manufacturing technology, rigorous quality control systems, and world-class engineering expertise to supply high-strength glass insulators for low voltage, high voltage, ultra-high voltage (UHV), and extra-high voltage AC/DC transmission lines worldwide.
Built on 20+ years of manufacturing excellence, QOCI Electric delivers world-class toughened glass insulators engineered for reliability, longevity, and performance in the most demanding power grid environments.
70,000 m² facility with an annual output of 39,000 tons ensures reliable delivery schedules for large-scale power grid projects worldwide.
53+ engineering technicians and 26+ invention & utility patents drive continuous innovation in insulator design and manufacturing processes.
Every insulator undergoes multi-stage quality inspection conforming to IEC 60305 and national standards, backed by comprehensive certifications.
Products are exported to over 50 countries across Asia, Africa, Europe, and the Americas, supporting diverse power grid infrastructure projects.
QOCI Electric offers a comprehensive range of toughened glass suspension insulators, engineered to perform in diverse environmental and operational conditions across global power transmission networks.
The standard profile features a leakage distance higher than indicated in IEC 60305. The insulation part is designed with shallow and well-spaced small ribs, which can be effectively self-cleaned by wind or rain.
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Characterized by long, widely-spaced under-ribs to avoid arc bridging. Features a leakage distance/spacing ratio of ~3.2, particularly effective in coastal (salt fog) and heavily polluted areas requiring higher specific leakage distance.
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Designed with an absence of under-ribs and an extended disk diameter. Reduces pollutant accumulation, effective in desert areas with wind and sand storms, and can solve ice-bridging problems in alternating string configurations.
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Two external ribs eliminate under-ribs, reducing pollution build-up. The surface self-cleans by strong winds and facilitates manual cleaning. Performs excellently in industrial pollution and saline soil areas.
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Features three layers of umbrella discs for outstanding self-cleaning, longer creepage distance, and excellent pollution flashover resistance. An important choice for UHV transmission lines in heavily polluted, high-altitude, and coastal humid environments.
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Achieves reliable grounding via internal or external metal accessories. Effectively guides lightning current, reduces line damage, and protects equipment safety. The smooth glass surface resists dirt adhesion for low maintenance.
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Room Temperature Vulcanization (RTV) silicone coating with mineral fillers enhances hydrophobicity, minimises leakage currents, and reduces operation/maintenance costs. An economical solution eliminating the need for regular cleaning.
Explore More →Our most popular toughened glass suspension insulators, trusted by power utilities and transmission line contractors across the globe for superior performance and compliance with international standards.
Our products are mainly high-strength glass insulators used in low voltage, high voltage, ultra-high voltage, and extra-high voltage AC/DC electric transmission lines. Engineered to withstand extreme environmental conditions — including coastal salt fog, desert sand, high altitude, heavy industrial pollution, icing, typhoons, and seismic zones — QOCI insulators deliver reliable performance across the world's most demanding geographic and operational scenarios.
With an established global supply chain network, QOCI Electric ensures fast, reliable delivery of toughened glass insulators to power utilities, EPC contractors, and distribution partners in over 50 countries.
Streamlined sea freight and air cargo logistics ensure competitive lead times from our Jiangxi production base to global ports of entry.
Strong financial backing ensures production capacity, raw material security, and the ability to fulfill large-volume project orders on schedule.
Flexible OEM manufacturing capabilities with customized mechanical ratings, shed profiles, and surface treatments to meet project-specific technical requirements.
Direct Chinese manufacturer pricing eliminates middlemen, delivering the best value on high-quality toughened glass insulators without compromising on standards compliance.
From raw material selection to high-voltage testing, every stage of our manufacturing process is controlled to the highest standards, ensuring each toughened glass insulator leaving our facility meets IEC and international specifications.
All incoming glass batches, metal fittings, and cement are inspected for chemical composition and mechanical properties before entering production.
Precise thermal toughening cycles are monitored to achieve the required surface compression ensuring spontaneous fracture self-detection — a key safety advantage of glass insulators.
Every disc is inspected for dimensional accuracy, surface defects, bubble content, and overall integrity in accordance with IEC 60305 requirements.
Routine mechanical tests including SML (Specified Mechanical Load) verification confirm that each insulator meets the rated mechanical strength for its designated application.
Power frequency voltage withstand tests and impulse voltage tests are conducted to verify the dielectric strength of every production batch.
Completed insulators undergo final visual inspection, marking, and are securely packaged in wooden crates or iron pallets to prevent transit damage during global shipment.
QOCI Electric is proud to have established long-term partnerships with leading power utilities, EPC contractors, and energy infrastructure organizations worldwide.
QOCI Electric holds a comprehensive portfolio of international certifications, demonstrating our commitment to quality, safety, and compliance with global power industry standards. Our insulators are certified and approved by leading international testing laboratories and regulatory bodies.
Stay informed about QOCI Electric's participation in global power exhibitions, industry developments, and the latest innovations in toughened glass insulator technology.
Having withstood extreme environmental conditions including icing, high altitude, pollution, earthquakes and typhoons, China's insulator industry has demonstrated the maturity and reliability of its technical portfolio on the world stage.
On behalf of our team at Jiangxi QOCI Electric Co., Ltd, we encourage you to join us at IEEE PES T&D Conference & Exposition 2026 — the powerhouse event for power transmission and distribution professionals worldwide.
Pingxiang, China — QOCI Electric, a leading global supplier of power equipment and insulator solutions, officially confirmed participation in the 11th Iraq Energy Exhibition, reinforcing its commitment to the Middle East power infrastructure market.
Contact Jiangxi QOCI Electric today for competitive pricing, technical specifications, and fast delivery on toughened glass suspension insulators for your power transmission project.
