Step down 3 phase Oil immersed power transformer supplier

OEM and ODM production are accepted.

Rated capacity: 400kVA, 300kVA, 600kVA, 630kVA, 250kVA

High voltage: 20kv, 33kv, 35kv

Rated Secondary Voltage: 0.44

Frequency: 50Hz/60Hz

Short-Circuit Impedance: 4%/4.5%/5%

Connection Symbol: Dyn11/Yyn0

Phase: 3

Standards: IEC, IEEE

Full-sealed oil-immersed distribution transformes with the core which is made of quality cold-rolled silicon sheet and is of a full-miter non-puncture structure and its coil is made of quality oxygen-free copper.


  • It adopts radiator oil tank of corrugated shteet type or expansion type.
  • It doesn’t need oil conservator.
  • The height of transformer is reduced.
  • The transformer oil doesn’t contract with air.
  • The no-load loss of Model S10-M is 20% lower than that of Model S9-M,
  • The no-load loss of Model S11-M is 30% lower thanS9-M.

Service Condition:

  • Altitude cannot exceed: 1000m
  • Highest ambient temperature: +40°C
  • Highest daily average temperature: +30°C
  • Highest annual average temperature: +20°C
  • Lowest outdoor temperature: -25°C

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