Sourcing high-voltage surge arresters from China
High-voltage surge arresters from China normally pay 2% UK duty; conditional authorised-use relief gives 0% for the specified offshore wind manufacturing use. Match the arrester's ratings and type test evidence to the buyer's network specification before ordering. Cambridge China Bridge sources high-voltage surge arresters.
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Normal duty and conditional authorised-use relief
Read from the UK Trade Tariff on 5 November 2026, heading 8535 covers switching and protection apparatus for voltages exceeding 1,000 V. High-voltage surge arresters fall within 8535 40 00 90, covering lightning arresters, voltage limiters and surge suppressors. The table shows applications and housing variants under that same commodity line. Chinese-origin goods normally carry 2% duty, with no anti-dumping or countervailing duty recorded.
The line records a 0.00 % suspension under authorised-use customs supervision for manufacturing rotor blades for incorporation in offshore wind turbines used in offshore wind energy production. This is conditional relief, not the normal rate for arresters installed in a wind project. The tariff also attaches fluorinated greenhouse gas import control and mercury export control. Confirm the applicable gas-control requirement with your customs broker against the actual construction and gas content; the mercury measure is listed as an export control.
Confirm the commodity code using the product's function, voltage and datasheet before shipment. For the other apparatus in this heading, see the high-voltage switchgear guide.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| High-voltage surge arresters with polymer housings | 8535 40 00 90 | 2% | None |
Specify the arrester for the network
Ask the buyer's electrical engineer to specify rated voltage, continuous operating voltage, temporary overvoltage capability, residual voltage, discharge current and energy capability. State the system earthing arrangement, indoor or outdoor location, pollution conditions, housing material, creepage distance, terminal fittings and mounting loads. Include the earth connection and any disconnector or monitoring accessories in the drawings.
The site's published switchgear guide identifies BS EN 60099-4 for surge arresters and network operator or buyer's engineer approval against type test evidence. Obtain reports covering the exact offered design and rating, rather than a similar model. Confirm with the relevant authority whether the Electrical Equipment (Safety) Regulations 2016 apply to the equipment's actual voltage and construction, rather than treating a marking as technical acceptance.
Worked duty example
Illustrative example, not a quote: Illustrative order: 40 station surge arresters under 8535 40 00 90, invoiced at £120,000 free on board, with £4,000 of freight and insurance to the UK. The customs value is £124,000. Duty at 2% is £2,480. Import VAT at 20% is charged on the customs value plus duty, £126,480, so it is £25,296. Import taxes total £27,776; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £2,480 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity: match model, serial identification, nameplate ratings and housing design to the approved datasheet and test reports.
Electrical evidence: check the agreed routine test records against the supplied units and have the buyer's engineer assess any unexplained result or missing record.
Housing and seals: inspect porcelain for cracks and chips, polymer sheds for cuts or distortion, and end seals for damage or signs of moisture.
Fittings and packing: check terminal threads, earth connections, mounting dimensions and supplied accessories; inspect restraints and packaging for impact damage.
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What goes wrong
A supplier may offer an arrester selected by nominal network voltage alone. Its continuous operating or temporary overvoltage capability can then mismatch the system, while its protective level may not suit the equipment being protected. Have the buyer's engineer approve the complete rating schedule before production.
Reports for a different housing or internal design do not establish the performance of the supplied model. Moisture ingress, damaged sheds, cracked porcelain and incorrect mounting fittings can also undermine acceptance. Agree the inspection records and rejection criteria before ordering, using testing and certification support where needed.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.
Frequently asked questions
What is the UK import duty on high-voltage surge arresters from China?
Normally 2% under 8535 40 00 90. The recorded 0.00 % suspension is restricted to the specified offshore wind rotor-blade manufacturing use under authorised-use supervision.
Which standard should I specify for high-voltage surge arresters?
The site's switchgear guide identifies BS EN 60099-4. Have the buyer's engineer agree the applicable specification and check that type test reports cover the offered design and rating.
Do high-voltage surge arresters need UKCA marking?
Confirm with the relevant authority whether the Electrical Equipment (Safety) Regulations 2016 apply to the actual product's voltage and construction. Check the actual product scope; a marking does not replace engineering acceptance.
What should I ask a Chinese arrester factory for?
Request a complete rating schedule, housing and mounting drawings, matching type test reports, agreed routine test records, terminal details and packing drawings.