Transmission hub substations, large renewable energy booster stations, cross-region power transmission projects, heavy industrial power plants, key infrastructure high voltage power systems. It undertakes switching and fast fault isolation for transmissio
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.
363kV Dead Tank SF6 Circuit Breaker features a robust design and high reliability with excellent arc extinguishing for power system protection.
High reliability dead tank SF6 circuit breaker for 40.5kV to 170kV, delivering robust protection for high-voltage transmission and substation applications.
RHD custom dead-tank SF6 breaker: tailored for non-standard voltages. High reliability for substations, new energy & industry.
The interrupter and live parts are enclosed inside a grounded metal tank. Built-in CT can be integrated, with excellent seismic performance and strong anti-pollution capacity compared with live tank circuit breaker.
This dead tank SF6 circuit breaker can be supplied for 72.5kV, 145kV, 170kV, 252kV and 362kV high voltage transmission systems, with customized rated current and short circuit breaking ratings.
Spring operating mechanism is adopted as standard. It realizes reliable opening and closing operation, supports auto-reclose sequence, low maintenance requirement and stable performance for frequent operation.
Gas density monitor is equipped as standard to track SF6 gas pressure and temperature in real time, trigger alarm and lockout protection when gas leakage occurs, to guarantee safe operation.
The dead tank design has good seismic performance. Anti-corrosion coating is optional for coastal salt mist, high humidity and heavily polluted outdoor sites, and can be customized for high altitude areas.
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