Knife
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: > Isolating switches and make-and-break switches > Knife
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 8535.30.00.40
15kV Gang-Operated Air Break Knife Switch
A high-voltage gang-operated air break knife switch rated for 15kV used in overhead power distribution lines to isolate sections of the circuit. It features multiple blades that open and close simultaneously for safe make-and-break operations exceeding 1,000V. Classified under HTS 8535.30.00.40 as a knife switch for electrical circuit isolation.
27kV Single-Phase Hookstick Knife Switch
A 27kV single-phase hookstick-operated knife switch for manual operation from ground level in utility substations. The hookstick design allows pole-top disengagement for safe circuit isolation above 1,000V. Meets HTS 8535.30.00.40 criteria for knife-style make-and-break switching.
5kV Three-Phase Side-Break Knife Switch
Three-phase 5kV side-break knife switch designed for indoor metal-clad switchgear applications. The side-mounted blade operation provides visible break confirmation for circuits exceeding 1,000V. Specifically classified as knife switch per HTS 8535.30.00.40.
38kV Vertical-Break Center-Rotating Knife Switch
38kV vertical-break knife switch with center-rotating blade mechanism for transmission line sectionalizing. Provides high-visibility open position for voltages exceeding 1,000V in outdoor installations. HTS 8535.30.00.40 specifically denotes this knife switch type.
7.2kV Double-Break Gang Knife Switch
7.2kV double-break gang-operated knife switch providing two interruption points per phase for enhanced safety. Used in industrial substations for reliable isolation above 1,000V. Precise HTS 8535.30.00.40 classification for knife switches.
12kV Oil-Immersed Knife Switch
12kV knife switch designed for immersion in transformer oil, providing superior arc quenching for high-voltage applications. The blade mechanism ensures reliable make-and-break above 1,000V in oil-filled enclosures. Classifies under HTS 8535.30.00.40 knife switch provisions.
24kV Hook-Operated Distribution Knife Switch
24kV hook-operated knife switch for pole-mounted distribution transformers, allowing ground crew operation. Features weatherproof porcelain insulators for outdoor >1,000V service. HTS 8535.30.00.40 knife switch designation.
4.16kV Pad-Mount Knife Switch
4.16kV pad-mounted knife switch for underground residential distribution vaults. Tamper-resistant design with visible blade position for voltages exceeding 1,000V. Specific HTS 8535.30.00.40 classification.