Widely used in 11kV ~ 550kV outdoor transmission & distribution substations, power plant switchyards, renewable energy power stations, for power circuit switching, overload and short-circuit fault protection.
11kV~550kV Live-Tank SF6 Circuit Breaker Series, Flexible Configuration, Reliable Performance for Harsh Outdoor Environments
RHB is outdoor live tank SF6 circuit breaker complying with IEC 62271-1 and IEC 62271-100 and KEMA type tested. Rated voltage ranges from 11kV up to 550kV, rated current up to 5000A, short-circuit breaking current up to 63kA. It adopts hybrid self-blast puffer arc quenching and oil-free spring mechanism. Composite or porcelain insulators are optional. It is widely applied in transmission substations and power plants for circuit control and fault protection.
Customizable live tank SF6 circuit breaker for 123kV, 145kV, and other ratings, offering reliable, high-voltage protection for transmission lines.
Live tank SF6 gas circuit breaker for 40.5kV to 363kV systems, delivering reliable, high-performance protection for transmission and substation applications.
52kV high-voltage vacuum SF6 circuit breaker for reliable protection and switching in medium-voltage power distribution and industrial systems.
live tank circuit breaker is a structural form of high-voltage circuit breaker, which is characterized by the use of ceramic insulation pillars to support key components such as arc extinguishing chamber and operating mechanism. The arc extinguishing chamber is usually arranged on the top or pillar of the ceramic pillar. It is mainly suitable for medium and high voltage power systems, with voltage levels covering the range of 72.5 kV to 1100 kV. live tank circuit breakers are common control and protection equipment in outdoor distribution devices such as 110 kV, 220 kV, 550 kV, and 800 kV substations.
A live tank breaker (also called a porcelain column breaker) mounts its core components on top of porcelain insulators with an open, visible layout. A dead tank breaker encloses all core parts — including the arc extinguishing chamber and current path — inside a grounded metal tank, achieving a highly integrated and compact structure.
It features compact footprint, high insulation level, intelligent secondary control & monitoring. The annual SF₆ leakage rate is less than 0.5% with a 30‑year maintenance cycle for substation outdoor application.
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