Having a power handling capacity not exceeding 650 kVA
Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof: > Liquid dielectric transformers: > Having a power handling capacity not exceeding 650 kVA
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Subheadings
Products classified under HTS 8504.21.00
Conventional Pole Transformer 37.5 kVA
37.5 kVA conventional mineral oil pole transformer, most common utility size. 7200/12470V primary. Standard 8504.21.00 product.
Pad-Mounted Single-Phase Transformer 25 kVA
A liquid dielectric transformer designed for underground distribution systems, rated at 25 kVA for residential power delivery. It uses mineral oil as the dielectric and steps down medium voltage to 120/240V single-phase. Classified under 8504.21.00 due to its power handling capacity not exceeding 650 kVA.
Pole-Mounted Distribution Transformer 50 kVA
Single-phase pole-mount transformer with mineral oil dielectric for utility pole installation, rated 50 kVA. Converts 7.2 kV to 120/240V for rural electrification. Fits 8504.21.00 as liquid dielectric unit under 650 kVA.
Residential Oil-Filled Transformer 100 kVA
Single-phase 100 kVA transformer with mineral oil immersion for suburban power distribution. Features dead-front design for safety. HTS 8504.21.00 applies to its sub-650 kVA liquid dielectric specs.
Distribution Class Transformer 45 kVA
Conventional mineral oil filled 45 kVA single-phase distribution transformer for pole mounting. Standard utility-grade with lightning arrestors. HTS 8504.21.00 for liquid type under capacity limit.
Self-Protected Transformer 25 kVA
25 kVA single-phase pole transformer with integrated bay-o-net fusing and mineral oil dielectric. Self-protected design reduces external protection needs. Classifies in 8504.21.00.
Loop-Feed Transformer 100 kVA
Dual-voltage 100 kVA single-phase transformer for loop-feed underground systems, oil-immersed. Allows radial or loop operation. Fits 8504.21.00 parameters.
Dead-Front Transformer 50 kVA
50 kVA pad-mounted dead-front transformer using less-flammable dielectric fluid. Safer elbow connectors for underground service. HTS 8504.21.00 confirmed.
Mineral Oil Distribution Transformer 75 kVA
Standard 75 kVA three-phase mineral oil transformer for neighborhood distribution. 13.2 kV class with conventional cooling. Under 8504.21.00.
Vegetable Oil Transformer 250 kVA
Eco-friendly 250 kVA three-phase transformer using vegetable-based dielectric oil. Fire-point exceeds 300°C for indoor use. Still 8504.21.00 liquid type.
Silicone Fluid Transformer 150 kVA
150 kVA single-phase transformer with silicone dielectric fluid for extreme temperature operation (-50°C to 110°C). Used in harsh environments. HTS 8504.21.00.
Three-Phase Padmount Transformer 75 kVA
75 kVA three-phase liquid-filled transformer for commercial pad-mount applications, using vegetable oil dielectric. Steps down 12.47 kV to 208Y/120V. Under 8504.21.00 for capacity ≤650 kVA and liquid dielectric.
Utility Single-Phase Transformer 167 kVA
167 kVA pole-top transformer using silicone-based liquid dielectric for overhead lines. Handles 14.4 kV primary to secondary service voltage. Qualifies under 8504.21.00 for power under 650 kVA.
Commercial Three-Phase Transformer 300 kVA
300 kVA three-phase liquid dielectric transformer for light industrial use, mineral oil filled. Provides 480V delta to 208Y/120V wye output. Fits 8504.21.00 criteria perfectly.
Mid-Range Padmount Transformer 500 kVA
500 kVA three-phase pad-mounted unit with natural ester dielectric fluid for underground commercial service. Rated for 34.5 kV primary. Under 650 kVA limit for 8504.21.00.