Customs classification of transformer bushings turns on real function at import, not their place in the power network.

Customs classification turned on the real nature and principal function of transformer lead-in bushings at the time of import. The Tribunal held that the goods were protective fittings for a transformer, enabling high-tension conductors to enter safely, and were used at the receiving end of the power flow. They were not outdoor transmission-line insulators designed for use in a transmission system, so Heading 85.18/27(7) did not apply. The items were therefore classified under Heading 85.18/27(1) as insulating fittings for electrical machines, appliances or equipment, and the Revenue's classification was upheld.

---

---

Issues: Whether transformer lead-in bushings/insulators are classifiable under Heading 85.18/27(7) as insulators designed for use in an electrical transmission system of 400 volts and above, or under Heading 85.18/27(1) as insulating fittings for electrical machines, appliances or equipment.

Analysis: The decisive factor was the character and function of the imported goods at the time of import. The bushings were fitted to transformers as protective lead-in fittings enabling high-tension conductors to enter the transformer safely, but they did not serve as outdoor supports or mounts for transmission lines strung over distances. Heading 85.18/27(7) was understood as covering insulators used in transmission lines and outdoor transmission works, whereas the imported items were principally fittings for a functioning transformer and were used at the receiving end of the power flow. The Tribunal distinguished earlier decisions relied upon by the importers on the ground that those cases concerned different goods and different factual settings.

Conclusion: The goods were not classifiable under Heading 85.18/27(7); they fell under Heading 85.18/27(1). The claim of the assessee was rejected and the Revenue's classification was upheld.

Ratio Decidendi: For customs classification, the decisive test is the real nature and principal function of the imported item at the time of import; an insulator that operates chiefly as a protective fitting for a transformer is not an insulator designed for use in a transmission system merely because it forms part of the broader electricity network.

---