Sourcing high-voltage switchgear from China

2% duty

Read from the UK Trade Tariff on 26 September 2026, fuses, automatic circuit breakers, isolating and make-and-break switches, lightning arresters, voltage limiters and surge suppressors, and other apparatus for switching or protecting circuits above 1,000 V carried 2% duty on goods from China, with no anti-dumping measure. Two lines carried 0% end-use suspensions under authorised-use supervision for offshore wind manufacturing, and one for a defined semiconductor switch module, so those only apply with the authorisation and the goods described. Equipment up to 1,000 V is in heading 8536, and panels and parts in heading 8538; check the commodity code by voltage.

Standards, approval and SF6

High-voltage switchgear is specified to the IEC 62271 series, adopted as BS EN 62271: part 100 for circuit breakers, part 102 for disconnectors and earthing switches, and part 200 for metal-enclosed switchgear, with high-voltage fuses to BS EN 60282-1 and surge arresters to BS EN 60099-4. Equipment above 1,000 V sits outside the Electrical Equipment (Safety) Regulations 2016, so there is no UKCA route; instead the distribution network operator or the buyer's engineer approves the product against type test reports from an accredited laboratory and the Energy Networks Association technical specifications before it can be connected.

Switchgear insulated with SF6 contains a fluorinated greenhouse gas, so it falls under the F-gas Regulation as it applies in Great Britain, including labelling of the gas quantity and rules for handling and recovery; vacuum and clean-air designs avoid that. See the switchgear enclosures and parts guide and the CE and UKCA guide.

Worked duty example

For a made-up shipment of 40 vacuum circuit breakers for 11 kV networks under 8535 21 00 90, add the £4,000 of freight and insurance to the £120,000 free-on-board price and customs sees £124,000. At 2%, duty on these high-voltage circuit breakers is £2,480; import VAT of £25,296 is 20% of the value with duty added. Together that is £27,776, but a VAT-registered importer usually gets the VAT back. Heavy switchgear ships crated by sea, so freight is a small share of the value. The duty and VAT guide walks through the calculation.

What goes wrong

High-voltage equipment fails on test evidence, ratings and insulation. Type test reports cover a different rating or design from the unit supplied, short-circuit breaking or internal arc ratings are claimed without an accredited test, and the product is not approved by the network operator that must connect it. Vacuum interrupters lose vacuum, SF6 units leak gas, partial discharge appears in cast resin parts, mechanisms fail before their rated operations, and control voltages or interlocks do not match UK practice.

Match type test reports and the laboratory's accreditation to the exact design and rating before ordering, confirm network operator approval or the approval route, witness routine tests at the factory including power-frequency withstand, partial discharge, contact resistance and mechanical operations, leak-test SF6 units, check control voltages, interlocks and labelling against the specification, and inspect crating for sea freight.

Cambridge China Bridge sources high-voltage circuit breakers, disconnectors, fuses and surge arresters for contractors and independent connection providers, with type test evidence checked and routine tests witnessed before shipment. See how we source switchgear.