Explore Rockwill’s project highlights across smart grids, EV charging networks, and power distribution. See how our reclosers, switchgear, transformers, and prefabricated substations deliver reliable performance worldwide.
Rockwill Dead Tank Circuit Breakers have been successfully put into operation under extreme cold and strong sandstorm conditions.
Project Overview
Deployed in the 330kV Geermu substation upgrade (Qinghai, China), the RMR-363 SF6 circuit breaker overcame extreme cold (-35°C) and severe sandstorm conditions. Featuring a single-break puffer-type arc chamber (63kA breaking), dual-main/dual-standby intelligent heating, and disc spring hydraulic mechanism, it achieved zero-failure operation, securing critical power supply for the Qinghai-Tibet Grid Interconnection Project.
Deployed in the 330kV Geermu substation upgrade (Qinghai, China), the RMR-363 SF6 circuit breaker overcame extreme cold (-35°C) and severe sandstorm conditions. Featuring a single-break puffer-type arc chamber (63kA breaking), dual-main/dual-standby intelligent heating, and disc spring hydraulic mechanism, it achieved zero-failure operation, securing critical power supply for the Qinghai-Tibet Grid Interconnection Project.
Engineered for Excellence & Durability
Single-break puffer-type arc extinguishing chamber delivers 63kA breaking / 5000A rated current. Disc spring hydraulic mechanism ensures precise single-phase or three-phase electrical interlocking operation with 10,000-cycle mechanical life. Intelligent heating (standard or dual-main/dual-standby) enables reliable operation down to -45°C. Current transformer adopts wound-core electromagnetic design with coil in air environment and triple-protection housing (waterproof, sand-proof, foreign-object resistant), guaranteeing stable secondary output in harsh conditions.
Single-break puffer-type arc extinguishing chamber delivers 63kA breaking / 5000A rated current. Disc spring hydraulic mechanism ensures precise single-phase or three-phase electrical interlocking operation with 10,000-cycle mechanical life. Intelligent heating (standard or dual-main/dual-standby) enables reliable operation down to -45°C. Current transformer adopts wound-core electromagnetic design with coil in air environment and triple-protection housing (waterproof, sand-proof, foreign-object resistant), guaranteeing stable secondary output in harsh conditions.
Driving Infrastructure Forward
As a benchmark for environmental adaptability in domestic high-voltage equipment, the RMR-363 is widely deployed across China’s northwest and northeast cold/sandy regions and supports "Belt and Road" projects in similar climates. Committed to "technology + scenario" innovation, we deliver resilient, intelligent solutions to advance global grid safety, sustainability, and digital transformation.
As a benchmark for environmental adaptability in domestic high-voltage equipment, the RMR-363 is widely deployed across China’s northwest and northeast cold/sandy regions and supports "Belt and Road" projects in similar climates. Committed to "technology + scenario" innovation, we deliver resilient, intelligent solutions to advance global grid safety, sustainability, and digital transformation.
Recent Success Reference
