ROCKWILL RHD Dead Tank SF6 Circuit Breaker is outdoor three-phase high voltage switching equipment adopting grounded metal tank structure, with SF6 gas acting as both arc extinguishing and insulating medium. It covers voltage range from 72.5kV up to 362kV, equipped with built-in current transformers and spring operating mechanism for reliable fault interruption. The product complies with IEC 62271-1:2017 and IEC 62271-100:2020. Relevant documents include Type Test Certificate No. TT-2025-04152, Witness Test Report No. WT-2025-09085, Routine Factory Test Report No. FT-2025 series, Raw Material Mill Certificates, all issued by CNAS accredited independent high voltage test laboratory and available for tender submission, utility review and project site acceptance. It features low gas leakage rate, strong seismic resistance, optional gas density monitoring and substation automation communication modules, suitable for harsh outdoor environments.