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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of glass rather than ceramics
Glass insulators fall under the separate heading for glass materials in 8546.10, regardless of voltage application.
If used for low-voltage applications under 1 kV
Insulators for voltages not exceeding 1,000 V are classified in heading 8547, separate from high-voltage ceramics.
If sold as unfinished ceramic articles without electrical specifications
Plain ceramic crucibles or laboratory ware without high-voltage design features go to Chapter 69 for ceramic products.
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Import Tips & Compliance
• Verify dielectric strength certification (e.g
• IEC 60168) and glaze composition for compliance; ensure marking of voltage rating and material per ANSI C29 standards; avoid misclassification as line post insulators under 8546.20.00.20
Related Products under HTS 8546.20.00.60
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.