Transformers · Substations · Switchgear

Distribution transformers and packaged substations, 6.6–35 kV

Manufacturer and OEM/ODM supplier for EPC contractors, utilities and renewable developers — built to your drawings and project standard, with type-tested series and routine tests on every unit before dispatch.

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30–2500 kVACapacity range

6.6–35 kVVoltage classes

8Product families

IEC / GBDesign standards

Solutions by application

Start from where the transformer has to work

A rural distribution pole, a steel plant substation and a wind farm step-up station ask for very different designs. Choose your application and we will tell you what fits, with the drawings and test reports to match.

Grid & Utility

Distribution networks and utility projects

Three-phase and single-phase oil-immersed distribution transformers, packaged substations, ring main units and export grids at 6.6, 11, 22 and 33 kV.

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Industrial & Commercial

Factories, buildings and campus power

Fire-safe cast-resin dry-type transformers for indoor rooms, plus LV assemblies and metal-clad switchgear that keep production and cooling loads running.

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Renewable Energy

Wind, solar and storage step-up

Step-up transformers and packaged substations for wind farms, photovoltaic plants and battery storage, including cold and high-altitude sites.

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Product families

Eight families, one manufacturing base

Our own factory in Anqing produces the transformers, and the same site builds the substations and switchgear that go with them, so the whole distribution package comes from one inspection and test regime.

Three-phase oil-immersed distribution transformers — S11 / S13 / S20 / S22
Single-phase oil-immersed transformers — D11 / D13 / D20 / D22
Cast-resin dry-type transformers — SC(B)10 / 11 / 12 / 13 / 14 / 18
Packaged substations — European, American, wind power and PV step-up
High voltage switchgear, ring main units and LV distribution assemblies

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Batch production of oil-immersed distribution transformers in the factory workshop

Export series

Built for overseas grids

Our export range is designed around the voltages and frequencies actually used by overseas utilities, not adapted from a domestic catalogue.

Parameter	Range
Voltage classes	6.6 kV / 11 kV / 22 kV / 33 kV
Capacity	30 – 2500 kVA
Frequency	50 Hz / 60 Hz
Vector group	Dyn11 and others on request
Customisation	Short-circuit impedance, temperature rise limits, tapping range
Documentation	English nameplates, drawings, test reports

11 kV distribution transformers · 33 kV distribution transformers

Export transformer loading into container

Transformer packed inside container for export

Why customers stay

Facts a buyer can verify

Own factoryBatch production at our Anqing base, with CNC winding, vacuum drying and vacuum oil filling in house.

Tested before dispatchRatio and vector group, resistance, no-load and load loss, applied and induced voltage, insulation resistance.

Reports on handType test and energy efficiency reports from national laboratories, with English copies for tenders.

Export paperworkContainer loading plans, reinforced packing, English documentation and shipment coordination.

Reference projects

Installed with utilities and EPC contractors

Our transformers and substations work in distribution network upgrades, industrial power projects and renewable step-up stations — at home in China and on export projects abroad.

Mozambique national power utility — distribution transformers and substations
Tbilisi power utility, Georgia — distribution transformers
Mozambique beverage plant — packaged substation
County level State Grid companies in Anhui — 10 kV transformers, JP outdoor distribution cabinets and terminal packaged substations

Ask for references in your market

Transformer coil winding at our manufacturing base

Three ways to buy

Economy, standard, or built to your drawing

Same factory and same windings, at three levels of specification — so a container order and a tender can both be quoted properly.

Economy

S11, published prices

Standard configuration, full copper windings, prices published on the site from USD 1,821.

Economy series →

Standard export

S13 / S20 for tenders

Lower losses with type test and energy efficiency reports, for utility and EPC specifications.

Standard export →

Custom / OEM

Built to your drawing

Your voltage combination, your impedance, your nameplate and packing — quoted against the drawing.

Custom / OEM →

Send us your grid parameters

Tell us the capacity, voltage combination, installation environment and destination port. We will come back with a technical proposal, drawings and a price — usually within one working day.

Request a quotation david@hengyuanpower.com