Liquid Dielectric Transformers Exceeding 10,000 KVA

The US schedule creates separate 10-digit lines for transformers in the 10,001–59,999 KVA range (8504230041), the 60,000–100,000 KVA range (8504230045), and above 100,000 KVA (8504230080). Each tier may carry different duty rates or be subject to different trade-remedy measures, so accurate nameplate capacity documentation from the manufacturer is essential for correct classification and duty calculation.

Beyond customs classification, large power transformers may require Department of Energy review under regulations governing bulk-power system equipment, and some configurations have been subject to executive orders restricting procurement from certain foreign adversary sources. Given manufacturing lead times of one to two years or more, utilities typically need to initiate procurement and import planning well in advance of project timelines, and should engage customs counsel early to address any applicable trade-remedy or national-security review requirements.