Power transformer installed at a substation

Transformer manufacturer · Jiangsu, China

Power, transformed with precision.

Oil-immersed, dry-type and special transformers up to 110 kV — designed, wound, tested and shipped from our own plant.

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110 kVMaximum voltage class

11 seriesClose to 1,000 ratings

3,000,000+ kVAAnnual output capacity

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Who we are

A dedicated transformer plant, built around quality you can measure.

YUYUAN specialises in power and distribution transformers. Our modern standard plant covers over 20,000 m² with close to 10,000 m² of production floor.

We produce oil-immersed transformers up to 110 kV, fully sealed low-loss units, resin-cast and H-class dry-type transformers, amorphous alloy transformers, compact substations, and special units for furnaces, rectifiers and explosion-proof mining duty.

“Do every job with care. Pursue excellence.”

0^m²Plant area

0^kVHighest voltage class

0⁺Employees, 30+ technical staff

0^{M+ kVA}Yearly capacity

Product range

Six families. One engineering standard.

S9 · S11 · S11-M

Oil-Immersed Power Transformers

6–10 kV, 35 kV and 110 kV classes. Fully sealed, low-loss distribution and power units.

SC(B) · SCB11 · SG10

Dry-Type Transformers

Epoxy resin-cast and non-encapsulated H-class designs for buildings, rail and indoor plants.

Energy-saving transformers ready for dispatch

Oil & dry type

Amorphous Alloy Transformers

Amorphous cores for markedly lower no-load loss — built for energy-efficient grids.

Furnace · Rectifier

Special Transformers

Electric furnace, rectifier and converter transformers engineered to the duty cycle.

KBSG9 mining explosion-proof dry-type transformer

KS9 · KBSG9 · KBSGZY9

Mining & Flameproof Units

Explosion-isolated dry-type transformers and movable substations for underground mines.

ZBW · CZB · CAB

Compact Substations

HV switchgear, transformer and LV distribution in one prefabricated enclosure.

Oil-immersed transformers on the YUYUAN factory floor

Manufacturing

Every core, every coil, every test — under our own roof.

Automated equipment and assembly-line production, guided by engineers who stay close to the floor.

CNC silicon-steel core cutting — **Core cutting**CNC shearing of grain-oriented silicon steel.

Foil winding machine — **Foil winding**Precise low-voltage coils for short-circuit strength.

Vacuum treatment equipment — **Vacuum treatment**Drying and impregnation for long insulation life.

Transformer routine test station — **Routine testing**Each unit checked on our test bench before dispatch.

Quality & compliance

Tested by national laboratories. Trusted by buyers worldwide.

Our products are built to Chinese national standards including GB 6450, GB/T 10228, GB 8286, GB 3836 and GB/T 17467. Certificates and test reports available on request.

ISO 9001Quality management system certification
National test reportsType tests by state-accredited (CNAS) transformer test centres
Model registrationEnergy-efficiency filing for S11-M and SCB11 series
Audited SupplierMade-in-China.com, onsite audit by SGS
Assessed SupplierAlibaba.com supplier assessment

Applications

Where our transformers work.

Utility distribution networks→ Wind & solar power stations→ Coal mines & tunnels→ Steel, furnace & electrolysis plants→ Commercial buildings & residential districts→ Oilfields & temporary power→

Our outlook

Building the equipment behind a low-carbon grid.

From amorphous-core units that cut no-load losses to step-up transformers for renewable plants, we keep raising the efficiency of every kVA we ship — and benchmark our designs against leading international practice.

Discuss your project

Get a quote

Send us your rating. We’ll send back a solution.

Tell us the capacity, voltage ratio, cooling and site conditions. Our engineers reply with a technical proposal and price.