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Electrical insulators of any material: > Of ceramics > Used in high-voltage, low-frequency electrical systems: > Other
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 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8546.20.00.60
Porcelain High-Voltage Post Insulator
A ceramic post insulator made from high-alumina porcelain, designed for supporting high-voltage conductors in substations operating at low frequencies (50-60 Hz). It features a glazed surface for weather resistance and mechanical strength exceeding 10 kN. Classified under 8546.20.00.60 as a ceramic insulator for high-voltage, low-frequency electrical systems, not specified elsewhere.
Alumina Ceramic Suspension Insulator
High-purity alumina ceramic insulator used in strings for overhead power transmission lines at 132 kV and above, low-frequency AC systems. It provides superior puncture resistance and is capped with forged steel fittings. Falls under HTS 8546.20.00.60 for other ceramic high-voltage, low-frequency insulators.
Steatite Ceramic Strain Insulator
Steatite-based ceramic insulator for dead-end strain applications in low-frequency distribution lines up to 69 kV, with high mechanical tensile strength. Its low-loss tangent suits transformer bushings too. HTS 8546.20.00.60 covers this as other high-voltage ceramic insulators.
Cordierite Ceramic Hollow Insulator
Hollow core cordierite ceramic insulator for GIS switchgear in high-voltage substations, low-frequency operations with excellent thermal shock resistance. Used for bushing cores in SF6 environments. Classified in 8546.20.00.60 as other ceramic high-voltage insulators.
Zirconia-Toughened Alumina Insulator
Advanced ZTA ceramic insulator for high-voltage circuit breakers in low-frequency power grids, offering fracture toughness over 5 MPa·m½. Designed for seismic-prone areas. HTS 8546.20.00.60 for other high-voltage low-freq ceramic insulators.
Porcelain Transformer Bushing Insulator
C-130 class porcelain bushing for oil-immersed power transformers rated 115 kV, low-frequency 60 Hz service. Features alternating petticoat sheds for contamination resistance. Under 8546.20.00.60 as other ceramic high-voltage insulators.
High-Alumina Ceramic Spool Insulator
Spool-shaped high-alumina ceramic insulator for guy wire strain relief in low-frequency transmission structures up to 230 kV. High tracking resistance per IEC 60273. HTS 8546.20.00.60 classification for other types.
Silicon Carbide Ceramic Surge Arrester Insulator
SiC valve block housing ceramic insulator for 132 kV surge arresters in low-frequency grids, pressure relief type. Provides non-linear voltage-current characteristics. Fits 8546.20.00.60 as other high-voltage ceramics.
Porcelain Station Post Insulator
Class 5 porcelain station post insulator for 69 kV bus support in low-frequency indoor switchyards, with high cantilever strength. Conforms to ANSI C29.9. HTS 8546.20.00.60 for other ceramic high-voltage insulators.
Boron Nitride Ceramic High-Voltage Spacer
BN composite ceramic spacer insulator for vacuum interrupters in high-voltage switchgear, low-frequency applications with superior arc resistance. Used in 72.5 kV systems. Under 8546.20.00.60 as other ceramics.