Tianyu ElectricTransformer Solutions
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Tianyu 220 kV power transformer in service at an outdoor substation

TIANYU ELECTRIC

Power Transformers
& Substations

35–220 kV power transformers, distribution transformers and prefabricated substations.

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220 kV power transformer, outdoor substation installation

A century of switchgear and transformer manufacturing.

With roots dating to 1920, Tianyu Electric is a wholly-owned subsidiary of XJ Group under China Electrical Equipment Group.

We supply 30+ product series up to 220 kV for projects across China and 28 countries.

Company profile
Plant area
100,000 m²
Large production equipment
460 sets
Test equipment
60 types
Large power transformers
1,200 / year
Distribution transformers
12,000 / year
Box-type substations
10,000 / year

From generation to load

Where Tianyu equipment sits in the power system.

Tianyu builds the equipment at every voltage step between a wind or solar plant and the final load, from 0.69 kV collection to 220 kV transmission.

Swipe sideways to follow the full diagram.

0.69 kV35 kV220 kV220 kV 110 kV35 kV10 kV0.4 kV Transmission line GWind PVPV + storage Industry Buildings Urban feeder Temporary YBH PV / ESS Booster SSZ 220 SSZ 110 SZ 35 S20 / S22 SCB18 ZGS / YB Mobile
Select a transformer or substation to see its data. The highlighted route shows the energy path to it.

Three product families.

Complete product directory
Technicians winding a power transformer coil on the large-transformer line

Manufacturing

Core, coil and tank made under one roof.

Key processes from coil winding and assembly to logistics and testing run at over 95% automation. The lines use Stollberg winding technology, MICAVAC kerosene vapour-phase drying and fully automatic core cutting from Georg and Soenen.

  • Large oil-immersed transformer winding line
  • Dry-type coil vacuum casting and intelligent winding lines
  • Robotic tank welding and C5-rated coating
Manufacturing base
Large transformer test hall with impulse generator and test transformer

Testing

Routine and type tests up to 220 kV.

The six-side shielded transformer laboratory has its own generator set and runs routine and type tests for transformers of 220 kV and below.

Lightning impulse
2,400 kV
Power-frequency withstand
300 kV
Partial discharge
8 channels
Test capability

Interactive guide · 8 steps

See how a power transformer is built.

Follow a three-phase oil-immersed power transformer from stacked core to factory test. Scroll the full guide to assemble it, or reverse to take it apart again.

  1. 01Core
  2. 02Windings
  3. 03Leads and tap changer
  4. 04Vacuum drying
  5. 05Tank, cover and bushings
  6. 06Oil filling
  7. 07Cooling and conservator
  8. 08Tests and release
Start the assemblyManufacturing process
Simplified front view of a three-phase oil-immersed power transformer being assembled step by step 2400 kV
Step 08 / 08Tests and release

Third-party reports, tied to tested models.

All certificates and reports
  1. 240 MVA 220 kVSSZ20 type test report
  2. 150 MVA 132 kVPower transformer test report
  3. 1,600 kVA 22 kVTÜV certificate of conformity
  4. SCB18 2,500 kVADry-type type test report
  5. 12,500 kVA 35 kVPrefabricated substation type test

Project map

International project references.

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All applications and projects
Datang Xiangshan 300 MW tidal-flat photovoltaic plant
Datang Xiangshan 300 MW tidal-flat PV, China. 220 kV double-split transformer and 35 kV switchgear.

References

In service from the Three Gorges to Brazil.

BrazilCEMIG 155 MW photovoltaic29 × 35 kV prefabricated substations
NigeriaAtlantic Industrial Park132 kV substation
ZambiaSunshare Nambala100 MW solar
DR CongoCMOC mining area500 MW solar
ChinaThree Gorges ProjectZN1-10 switchgear, 1998
ChinaShanghai World Expo venues16,000 kVA dry-type, 2010
All project references

Send us the single-line diagram or specification.

Our engineers review ratings, site conditions and required documents before quoting.

Contact details