SF6 dead‑tank circuit‑breaker, voltage range 11‑550kV, rated current 1600‑5000A, short‑circuit breaking current 25‑63kA, self‑blast arc‑extinguishing, spring‑operated mechanism for outdoor substation.
This 2026‑version PDF product manual serves for tendering, equipment selection, substation engineering design and on‑site installation‑maintenance reference.
The equipment complies with IEC 62271‑100, GB/T 1984 and related CEI, JB, DL standards. This manual explains self‑blast arc‑extinguishing operating principle, single‑/three‑phase post‑type porcelain‑insulator structure, dual‑seal flange design and pointer‑type density relay for gas condition monitoring.
It lists complete performance indicators including partial discharge value, SF₆ alarm‑blocking pressure, allowable gas moisture content, annual gas leakage rate ≤0.5%, mechanical endurance up to 10000 operations, special reclosing duty O‑0.3s‑CO‑180s‑CO and full set of timing parameters.
It defines service environmental conditions covering ‑40℃~+55℃ ambient temperature, maximum installation altitude of 3000 m and seismic resistance up to 9‑degree intensity, and provides outline dimension drawings, power‑supply requirements for heater, energy‑storage motor and control circuit, after‑sales service instructions. Custom‑built design, assembly and testing solutions are available. P
lease contact us for editable CAD files and complete type‑test reports.
230-252kV Dead-Tank SF6 Breaker: 9-degree seismic, ≤1% leakage. High-reliability for 220kV+ grids & new energy bases.
420kV Dead Tank SF6 Circuit Breaker provides high reliability and fast arc extinction for stable grid operation with a robust design.
Dead Tank SF6 Circuit Breaker (550kV) offers high performance and reliable arc interruption. Its robust design ensures stability for ultra high voltage systems.
SF6 gas may liquefy at extremely low temperature, which will degrade arc‑quenching performance. Corresponding technical measures shall be adopted for cold‑region projects. Please contact us for low‑temperature solution.
Pay attention to ambient temperature range, altitude derating requirement, seismic intensity and ambient contamination class. Special modification is needed beyond standard conditions. Please contact us for environment‑adaptation suggestion.
Dual‑seal design separates waterproof outer ring and gas‑proof inner ring, effectively reduces SF6 gas leakage and enhances outdoor environmental adaptability. Please contact us for structural drawing reference.
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