In circuits of 345 kV or more
Electrical apparatus for switching or protecting electrical circuits, or for making connections to or in electrical circuits (for example, switches, fuses, lightning arresters, voltage limiters, surge suppressors, plugs and other connectors, junction boxes), for a voltage exceeding 1,000 V: > Automatic circuit breakers: > Other > In circuits of 345 kV or more
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8535.29.00.20
ABB SF6 Gas-Insulated Circuit Breaker 420kV
High-voltage SF6 gas-insulated automatic circuit breaker designed for 420kV transmission lines to protect against overcurrents and short circuits. It falls under HTS 8535.29.0020 because it is an automatic circuit breaker rated for circuits exceeding 345kV. Used in utility-scale power grids for reliable switching and fault interruption.
Siemens 3AP2 FI 550kV Dead Tank Circuit Breaker
Dead-tank SF6 circuit breaker rated at 550kV for outdoor substation use in extra-high voltage networks. Classified under HTS 8535.29.0020 as an automatic circuit breaker for circuits over 345kV. Provides superior arc quenching and minimal maintenance for power transmission.
GE Grid Solutions HVB-550kV Live Tank Circuit Breaker
Live-tank circuit breaker operating at 550kV with spring-hydraulic mechanism for ultra-high voltage transmission lines. Meets HTS 8535.29.0020 criteria for automatic circuit breakers in 345kV+ circuits. Features fast interruption times for grid stability.
Hyundai 765kV SF6 Circuit Breaker for UHV Lines
Ultra-high voltage 765kV SF6 puffer-type circuit breaker for long-distance transmission networks. Falls under HTS 8535.29.0020 for automatic circuit breakers exceeding 345kV rated voltage. Engineered for extreme reliability in national grid backbone applications.
Toshiba GF8T-420kV Double Break Circuit Breaker
420kV double-break pole SF6 circuit breaker with one-time maintenance design for substations. Classified in HTS 8535.29.0020 as automatic circuit breaker for >345kV circuits. Provides high mechanical endurance for frequent operation.
Alstom/Areva 525kV Tank Circuit Breaker
525kV SF6 tank-type circuit breaker for high-capacity transmission corridors. Meets HTS 8535.29.0020 for automatic circuit breakers in circuits exceeding 345kV. Compact design saves substation footprint.
XD Electric 1000kV UHVDC Circuit Breaker Prototype
1000kV ultra-high voltage direct current circuit breaker for HVDC converter stations. Classified under HTS 8535.29.0020 due to automatic circuit protection function in extreme high-voltage (>345kV) DC circuits. Specialized for renewable energy backbones.
Mitsubishi 362kV Single Break SF6 Breaker
362kV single-break SF6 circuit breaker for 345kV transmission class applications. Falls under HTS 8535.29.0020 as automatic circuit breaker specifically for circuits of 345kV or more. Optimized for minimal SF6 gas usage.