Transformer heading applies to specialised transformer types; extended limitation needs suppression of facts with intent to evade duty.

Goods operating on the transformer principle, with primary and secondary coils working by induction, were treated as transformers even though they were used for testing or specialised equipment. The broad transformer heading covered high voltage test transformers, current transformers, capacitor voltage transformers and balancing transformers, while the residuary heading applied only where no specific heading in Chapter 85 covered the goods. On limitation, regular filing and approval of classification lists negatived suppression of facts with intent to evade duty, so the extended period was unavailable and demand could proceed only within the permissible limited period.

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Issues: (i) Whether high voltage test transformers, current transformers, capacitor voltage transformers and balancing transformers were classifiable under Heading 85.04 or under the residuary Heading 85.43. (ii) Whether the demand could be sustained for the extended period or only prospectively in the absence of suppression of facts.

Issue (i): Whether high voltage test transformers, current transformers, capacitor voltage transformers and balancing transformers were classifiable under Heading 85.04 or under the residuary Heading 85.43.

Analysis: The goods were found to function on the transformer principle through primary and secondary coils using induction, and the evidence showed that they were rated and used like transformers notwithstanding their specific application in testing or supplying equipment. The tariff heading for transformers was held to cover all types of transformers, including instrument transformers and those designed for particular purposes, while Heading 85.43 applied only when classification was not possible elsewhere in Chapter 85. The HSN notes were treated as supporting the broad scope of Heading 85.04.

Conclusion: The goods were correctly classifiable under Heading 85.04 and not under Heading 85.43, against the assessee.

Issue (ii): Whether the demand could be sustained for the extended period or only prospectively in the absence of suppression of facts.

Analysis: The classification lists had been filed and approved regularly, and nothing on record showed suppression of facts with intent to evade duty. The longer period was therefore not attracted. However, where classification is changed, duty could still be demanded for the period recognised by the applicable limitation rule, and the plea for purely prospective operation was rejected.

Conclusion: The extended period was not available, and the demand was confined to the permissible limited period, against the department on the larger limitation claim.

Final Conclusion: The classification dispute was decided in favour of the revenue, while the limitation issue was decided in favour of the assessee on the question of extended period, and both appeals were dismissed.

Ratio Decidendi: Goods that function on the transformer principle and are classed and rated as transformers fall within the transformer heading even if used for a special purpose, and the residuary heading applies only when no specific heading covers the goods; the extended limitation period requires suppression of facts with intent to evade duty.

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