Low Loss Oil-Immersed Transformer for Grid Applications

The S22 5000kVA oil-immersed transformer from Kechangelec is meant for jobs where the power draw is very high, such as city substations or heavy industry. It is built to run day and night without interruption and to stay reliable under tough load conditions.

Inside, the core uses grain-oriented silicon steel that helps cut down on wasted energy. The windings are copper, wound tightly so they can handle both electrical flow and mechanical stress. Transformer oil fills the tank, acting both as insulation and as a way to carry heat away. The tank itself is thick steel with a protective coating, giving it long service life even outdoors.

Cooling relies on a natural oil-and-air cycle (ONAN). Oil moves on its own inside the unit, while air passes across the radiators. No pumps or fans are needed, which keeps the system simple and reduces maintenance.

Before delivery, each unit goes through step-by-step checks. The team inspects electrical behavior, verifies oil condition, looks for leaks, and measures load losses. Only after passing all of these tests is the transformer cleared to ship.

• Can handle very large power loads, like those in city grids or big factories.
• Cools itself naturally, with oil and air moving inside the tank, even under heavy use.
• Quieter than older designs, which is helpful in areas where noise matters.
• Tank and materials are strong and built to last for many years with little maintenance.
• Tap settings, bushings, and monitoring gear can be added or adjusted for each project.

This S22 5000kVA oil-immersed transformer is ideally suited for:

• National or regional utility substations managing vast power flows
• Major industrial power hubs in heavy manufacturing or processing zones
• Large-scale renewable energy tie-ins-particularly for extensive solar or wind farms
• Critical infrastructure such as airports, metro systems, and large data centers
• Central energy distribution centers requiring steady, uninterrupted performance

 

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.

Honor and qualification

 

 

Official certification, professional after sales service.

ISO 9001

ISO 14001

ISO 45001

ISO 50001

COC

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