ABB SF6 Gas-Insulated Circuit Breaker 420kV from Canada
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.
Duty Rate — Canada → United States
12%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Obtain IEEE/ANSI certifications and dielectric test reports; ensure SF6 gas handling complies with EPA regulations; declare exact voltage rating to avoid misclassification under lower kV subheadings