Porcelain Suspension Insulators
High-voltage porcelain suspension insulators designed for suspending overhead power transmission lines, typically rated 69kV to 230kV. These ceramic insulators provide electrical insulation and mechanical support in low-frequency AC systems. Classified under 8546.20.00.30 as suspension-type ceramic insulators for high-voltage applications.
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 ceramic
Glass insulators fall under the 'of glass' subheading regardless of voltage application
If not specifically designed for high-voltage electrical use
General ceramic refractory goods without electrical insulator functionality go to Chapter 69
If when imported as complete insulator strings with metal fittings
Assembled insulator sets with hardware may classify as electrical insulators of other types
Not sure which classification is right?
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Import Tips & Compliance
• - Verify insulator strength rating (e.g
• 70kN, 120kN) matches technical specifications for customs valuation
• - Provide ANSI C29.2 or IEC 60383 certification to avoid reclassification as general ceramic ware
• - Common pitfall: Missing pollution performance data can trigger additional testing requirements
Related Products under HTS 8546.20.00.30
Pin-Type Porcelain Insulators
Ceramic pin-type insulators for supporting overhead distribution lines up to 33kV, featuring a single pin mounting design. These provide both insulation and mechanical attachment for crossarms in low-frequency systems. Meets HTS 8546.20.00.30 as pin-type ceramic insulators for high-voltage use.
Line Post Porcelain Insulators
Station post ceramic insulators for vertical mounting on utility poles, rated 15kV to 69kV for distribution substations. These provide cantilever strength for line support in high-voltage, low-frequency circuits. Specifically covered by HTS 8546.20.00.30 as line post insulators.
69kV Suspension Disc Insulators
Porcelain disc suspension insulators rated at 69kV, used in strings for overhead transmission towers. Each cap-and-pin unit provides high mechanical strength and contamination resistance. Classified under 8546.20.00.30 for suspension-type ceramic high-voltage insulators.
Horizontal Line Post Insulators
Ceramic horizontal line post insulators for 46kV distribution, featuring trunnion mounting for crossarm applications. Designed for high mechanical load and electrical reliability in low-frequency systems. HTS 8546.20.00.30 covers these as line post ceramic insulators.
ANSI C29.2 Suspension Insulators
Standard porcelain suspension insulators conforming to ANSI C29.2 specifications for 115kV transmission lines. Fog-type design resists surface contamination and provides superior flashover protection. Specifically identified under HTS 8546.20.00.30 as suspension insulators.