Widely applied in 245kV power transmission substations, power plant switchyards, hybrid switchgear projects for power system control and fault protection.
This PDF outlines structural layout and key technical data of RHD-245 SF6 dead tank circuit breaker.
RHD-245 is SF6 gas insulated dead tank circuit breaker complying with IEC 62271-1 and IEC 62271-100 and KEMA type tested. Rated voltage 245kV, rated current up to 4000A, short-circuit breaking current up to 50kA. It adopts self-blast arc quenching and spring operating mechanism. Integrated CT inside bushings is optional. It is widely used for switching and fault protection in 245kV transmission substations.
230-252kV Dead-Tank SF6 Breaker: 9-degree seismic, ≤1% leakage. High-reliability for 220kV+ grids & new energy bases.
EHV dead tank SF6 circuit breaker factory for 245kV and 252kV systems, delivering reliable, high-performance protection for transmission grids.
High voltage live tank SF6 circuit breaker for 72.5kV, 126kV, 145kV, 252kV, delivering reliable protection for transmission and subtransmission grids.
These Dead Tank Vacuum Circuit Breakers utilize high-vacuum technology as both the insulating and arc-extinguishing medium. This allows for exceptionally fast arc-quenching and prevents arc re-ignition during fault current interruptions, ensuring maximum stability for high-voltage power systems.
Q:Which voltage levels are covered by this series of Dead Tank Vacuum Circuit Breakers?
A:The series is designed for versatile high-voltage applications, offering standardized ratings at 40.5kV, 72.5kV, 145kV, 170kV, and 245kV. This wide range allows the Dead Tank Vacuum Circuit Breakers to be deployed across various transmission lines and substation architectures.
Q:How do these Dead Tank Vacuum Circuit Breakers perform in harsh outdoor environments?
A:Designed with enhanced environmental adaptability, these Dead Tank Vacuum Circuit Breakers feature a robust dual-seal flange design. This provides superior waterproof and gas-tight protection, ensuring reliable operation even under extreme weather conditions and challenging outdoor scenarios.
Q:What is the expected operational lifespan of the Dead Tank Vacuum Circuit Breakers?
A:Equipped with a high-precision spring operating mechanism, these Dead Tank Vacuum Circuit Breakers are built for long-term durability. They boast a mechanical lifespan exceeding 10,000 operations, which significantly reduces the frequency of maintenance and ensures a rapid, precise response throughout the equipment's service life.
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.
The RHD series features a specialized low-center-of-gravity design that provides 9-grade seismic resistance. This ensures the Dead Tank Vacuum Circuit Breaker remains structurally sound and maintains rock-solid performance even during high-intensity earthquake events, making it a proven choice for high-risk geographical areas.
Q:How does the Dead Tank Vacuum Circuit Breaker achieve zero-pollution operation?
A:Unlike traditional high-voltage equipment, this Dead Tank Vacuum Circuit Breaker uses high-vacuum technology (degree 10⁻⁴Pa) for arc extinction instead of SF6 gas. By eliminating greenhouse gases, it removes the risk of toxic leaks and aligns with global green energy trends and strict environmental standards.
Q:Can this Dead Tank Vacuum Circuit Breaker be customized for non-standard power grids?
A:Yes, we offer "all-round customization" for the Dead Tank Vacuum Circuit Breaker. While it covers standard 40.5kV to 252kV grades, we can craft seamless-fit solutions for non-standard voltages (such as 46kV, 69kV, or 75kV) and current ratings from 1250A up to 6300A in single, two, or three-phase configurations.
Q:What are the maintenance benefits of using a Dead Tank Vacuum Circuit Breaker ?
A:The RHD series is designed to be virtually maintenance-free. It utilizes an oil-free and gas-free spring-operated mechanism and a vacuum interrupter rated for over 10,000 cycles. Additionally, every Dead Tank Vacuum Circuit Breaker is fully assembled and tested at the factory, so no on-site disassembly or high-voltage testing is required during installation.
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