Chapter 85 covers electric motors, electrical equipment and parts thereof, and sound recording and reproducing equipment, television image and sound recording and reproducing equipment and parts and accessories thereof. This chapter has a broad scope, including power generation, transformation, energy storage, power-consuming equipment, as well as communication, recording and other electronic products. Transformers, as core equipment for power transmission and conversion, belong to an important commodity category of this chapter. Heading 8504 includes transformers, static converters (such as rectifiers) and inductors. Transformers are used to change AC voltage and current, and are widely used in power systems and electronic equipment. This heading covers liquid dielectric transformers, dry-type transformers, instrument transformers, static converters and inductors, but excludes electric welding transformers (heading 8515) and certain special-purpose transformers (such as those for X-ray machines). The first 2 digits 85 represent Chapter 85 (electric motors, electrical equipment). Digits 3-4, 04, represent heading 8504 (transformers, static converters and inductors). Digits 5-6, 32, are the subheading, specifically 850432, referring to transformers with a capacity exceeding 1 kVA but not exceeding 16 kVA. The subheading is further divided by capacity: 850431 for not exceeding 1 kVA, 850432 for 1-16 kVA, 850433 for 16-500 kVA, and 850434 for exceeding 500 kVA. Therefore, 850432 specifically refers to small and medium-capacity transformers. The commodity is a transformer with a capacity between 1-16 kVA, falling under heading 8504. According to the capacity breakdown, 1-16 kVA falls under subheading 850432. If the capacity does not exceed 1 kVA, it should be classified under 850431; if it exceeds 16 kVA, it should be classified under 850433 or 850434. Therefore, capacity is the key factor determining classification under 850432.

Product Name: Fill in the standard name of the commodity, such as "transformer", and a model or purpose may be added. Brand: Fill in the manufacturer or brand name; if there is no brand, fill in "no brand". Model: Fill in the specific model of the product for easy identification. Capacity: Fill in the rated capacity of the transformer in kilovolt-amperes (kVA), and it must be clearly within the range of 1-16 kVA. Purpose: Fill in the application scenario of the transformer, such as "used for power distribution", "used for industrial equipment", etc. Type: Fill in the transformer type, such as "dry-type", "oil-immersed", etc. Rated Frequency: Fill in the operating frequency of the transformer, such as 50Hz, 60Hz. Phase: Fill in the number of phases of the transformer, such as single-phase, three-phase. Product Name: Transformer; Brand: ABB; Model: T-1000; Capacity: 10kVA; Purpose: Used for power distribution; Type: Dry-type; Rated Frequency: 50Hz; Phase: Three-phase. The capacity unit is mistakenly filled in as VA instead of kVA, leading to classification errors. Ignoring the capacity range, mistakenly classifying below 1 kVA or above 16 kVA under this code. The purpose description is not specific, which may affect customs judgment on classification.

The core determining basis for classification is the rated capacity of the transformer. According to HS notes, subheading 850432 clearly applies to transformers with a capacity exceeding 1 kVA but not exceeding 16 kVA. When classifying, accurate capacity parameters must be provided, and it must be confirmed whether they fall within the range. In addition, transformers must be distinguished from other static converters (such as rectifiers) and inductors to ensure the commodity meets the definition of a transformer. 850431 Transformers (capacity ≤1kVA): Capacity not exceeding 1 kVA, often used in electronic equipment, while 850432 has a capacity of 1-16 kVA. 850433 Transformers (capacity 16-500kVA): Capacity exceeding 16 kVA but not exceeding 500 kVA, suitable for larger power systems. 850440 Static converters: Static converters are used to change the type of current (such as AC/DC), while transformers only change voltage. 850450 Inductors: Inductors are used for filtering, energy storage, etc., and do not change voltage, differing from the function of transformers. Confirm whether the transformer capacity is between 1-16 kVA. Verify whether the commodity is a transformer rather than a converter or inductor. Check whether it belongs to excluded commodities such as electric welding transformers. Confirm whether parameters such as rated frequency and phase are accurate. Verify whether declaration elements such as brand and model are complete.

How can I check the tariff rate for 850432? It can be checked through the official website of the General Administration of Customs, the International Trade Single Window, or professional customs declaration software. Tariff rates may change due to countries, trade agreements, and policy adjustments, and it is recommended to rely on the feedback from the customs system at the time of declaration. Under which code should a transformer with a capacity of exactly 1 kVA be classified? According to HS notes, 850431 applies to transformers with a capacity not exceeding 1 kVA, so 1 kVA should be classified under 850431. 850432 applies to more than 1 kVA up to 16 kVA. How are transformers and static converters distinguished? Transformers change AC voltage through electromagnetic induction and do not change frequency; static converters are used to change the type of current (such as rectification, inversion) and may change voltage and frequency. Classification should be judged based on the main function. What are the consequences of filling in the wrong capacity unit during declaration? It may lead to classification errors, thereby affecting tariff rates, regulatory conditions, and customs clearance efficiency. In serious cases, it may be deemed as inaccurate declaration and result in administrative penalties. Does 850432 include instrument transformers? Instrument transformers are usually classified under 850431 or 850432, but this must be judged according to capacity. If the capacity of the instrument transformer is 1-16 kVA, it is classified under 850432; otherwise, it is classified under other subheadings. What certifications are required for exporting transformers to the EU? CE certification is usually required, including the LVD Low Voltage Directive and the EMC Electromagnetic Compatibility Directive. The specifics depend on product characteristics and use, and it is recommended to consult a professional certification body. How can one determine whether a transformer is dry-type or oil-immersed? Dry-type transformers do not use liquid cooling and are usually epoxy resin cast or air-cooled; oil-immersed transformers use insulating oil for cooling. The type must be truthfully filled in during declaration. What common regulatory conditions apply to transformers under 850432? They may involve import and export commodity inspection, energy efficiency labeling, etc. Specific regulatory conditions vary by country and can be checked through customs tariff schedules or by consulting a customs broker.