From 1,100 kV UHV circuit breakers to 3.6 kV arc-resistant distribution panels — four equipment families from OEM production lines that built China\u2019s first GIS (1971), first ±800 kV DC switchgear (2016), and continue to deliver to utilities and AI data centers worldwide. IEEE C37 / IEC 62271 compliant, SCADA / IEC 61850 ready.
Outdoor SF₆ and vacuum high-voltage circuit breakers from the plant that built China’s first 550 kV double-break GCB (1984), first 252 kV single-break GCB (1987), first 1100 kV AC filter-group CB (2017), and the first ±515 kV DC high-speed switch (HSS) in 2019. Single-element porcelain live-tank construction with advanced arc-extinguishing chambers; spring or hydraulic-spring (Belleville) mechanisms; integrated condition monitoring for predictive maintenance. Full 6-category, 30-series, 1,400+ specification product tree proven across State Grid UHV projects and 40+ export markets.
Compact SF₆ gas-insulated switchgear assemblies integrating circuit breakers, disconnectors, earthing switches, and instrument transformers in sealed, maintenance-free enclosures. Built on the production line that delivered China’s first 110 kV GIS in 1971 (Danjiangkou Hydropower Station), the first 252 kV single-break GIS in 1980, the first 800 kV outdoor AC disconnector in 2005, and the first ±800 kV DC complete-switch device in 2016. Assembled in a world-class Class-100,000 clean room (20±2°C / 50±5% RH year-round) with 1,000 kV no-PD type-test hall. Hybrid GIS (HGIS) option combines compactness with modular field-replaceable bays.
Arc-resistant metal-clad medium-voltage switchgear from one of China’s oldest switchgear manufacturers with a heritage brand dating back decades. Type-tested to IEC 62271-200 internal-arc class IAC AFLR 50 kA 1 s and IEEE C37.20.7. Withdrawable vacuum circuit breakers, integrated IEC 61850 / DNP3 / Modbus protection relays, N+1 and 2N bus topologies, and short ~8-week delivery windows make these panels a standing solution for data center medium-voltage distribution and utility customer substations.
Our HV switchgear OEM was founded in 1955 as one of the “156 key projects” of China\u2019s First Five-Year Plan. Since then, the plant has produced China\u2019s first 110 kV GIS, first 252 kV and 550 kV SF\u2086 circuit breakers, first 800 kV outdoor AC disconnector, first \u00b1500 kV and \u00b1800 kV DC switchgear, and first 1,100 kV AC filter-group circuit breaker. World-class 100,000-grade clean assembly, CNAS-accredited labs, and 3A measurement-system certification ensure every unit meets utility-grade reliability.
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