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.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If encapsulated dry-type version
Dry dielectrics shift to 8504.31 subheading.
If integrated with gas turbine generator
Turbo-generator assemblies fall under Chapter 84 machinery.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Certify oil as non-PCB compliant per EPA regs; test reports required
• Avoid misdeclaration as 'inductor only'—full transformer function governs
• Document pressure relief and temperature rise for customs verification
Related Products 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.
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.