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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for use in low-voltage (<1kV) switchgear
Low-voltage ceramic insulators shift to 8547.20, excluding high-voltage applications.
If imported as refractory structural components
Containing >50% alumina or silica, used refractorily, classified in Chapter 69 without electrical function.
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Import Tips & Compliance
• Certify vacuum tightness per IEC 60137; declare inner/outer diameter specs; avoid bulk packing that suggests unfinished goods under Chapter 69
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