High Efficiency Oil-Cooled Power Transformer

The S22 3150kVA oil-immersed transformer from Kechangelec is built for tough medium-voltage applications, like industrial substations or large utility setups. It's designed to keep running reliably, with good heat management, low noise, and solid insulation-basically made to handle places where uptime really matters.

The core is made from low-loss grain-oriented silicon steel, which helps cut down unwanted magnetic losses. Copper windings are carefully arranged to keep voltage stable. The transformer uses high-quality mineral oil both to insulate and to help with cooling-it's good at carrying heat away while staying electrically safe. The steel tank is thick, fully welded, and coated to resist corrosion, so it can handle rough outdoor conditions. Big ONAN cooling fins let the unit shed heat naturally, without needing extra fans or pumps.

Before leaving the factory, every S22 3150kVA transformer goes through thorough testing to meet IEC, ISO, and CE standards. That includes checking temperature rise, dielectric strength, impedance, and ensuring seals are leak-proof. By the time it ships, each unit has already proven it can handle different climates and heavy loads.

• Handles heavy loads – Works for big industrial sites or utility networks.
• Keeps cool naturally – Passive ONAN cooling keeps temperatures under control.
• Runs quietly – Design of core and windings keeps noise down, even in sensitive areas.
• Built to last – Reinforced tank and corrosion-resistant coatings for long-term field use.
• Flexible setup – Tap changers, remote monitoring, or control features can be added depending on project needs.

 

Our factory & quipment

 

Our transformer production combines automation equipment with the exquisite craftsmanship of experienced technicians, from winding, assembly to insulation treatment, each process is strictly controlled by an experienced technical team.The workshop environment has constant temperature and humidity, in line with ISO 9001 international quality management standards, to ensure that the product performance is stable, safe and durable. Transparent and visualized production processes. We are committed to using technology to improve efficiency and provide customers with zero-defect industrial power solutions.

This transformer works well in a bunch of different setups:

• City and regional substations – handles power distribution across neighborhoods and urban areas.
• Heavy industrial sites – perfect for factories and large manufacturing plants with heavy machinery.
• Renewable energy farms – like big solar or wind projects feeding power into the grid.
• Critical infrastructure – airports, train stations, hospitals-places where downtime isn't an option.
• Utility central hubs – if you need high-capacity transformers for resilient energy distribution, this unit can do the job.

Honor and qualification

 

 

Official certification, professional after sales service.

ISO 9001

ISO 14001

ISO 45001

ISO 50001

COC

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