Three phase distribution transformers

25 kVA 33/0.4 kV Aluminium Winding EcoDesign Transformer

Rated Power: 25
Rated Voltage: 33
Number of Phase: 3
Frequency: 50
Cooling: ONAN
Type: Outdoor or Indoor
Cable Box: Standard
Cooling Surface: Radiator
Winding Material: Copper and/or Aluminum
Tap Changer: Off load tap changer
High Voltage Bushings: Porcelain
Conservator Tank: Hermatically Sealed
Air Breather: Standard
Pressure Relief Device: Standard for hermetically sealed type
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We generally manufacture distribution transformers in this power range, mainly in two different types:

  1. Transformer with conservator tank (WCT),
  2. Hermetically sealed type (HST),

 Below table will help to engineers to select the best option according to environmental conditions which transformer works in:

  High Environmental Temperature High Altitude Rural Network High Humidity Over Load Conditions Unstable Loading

 Meanwhile here is the advantage-disadvantage of the WCT-HST types:

  • In HST type, tank pressure is more than WCT type. WCT type generally works under low pressure due to its open to atmosphere,
  • In HST type, cooling/insulation oil does not contact to the air (theoretically). Therefore oil maintenance period is longer than WCT type,
  • HST type transformers and their related parts generally work under higher temperature (If we evaluate WCT-HST work under same conditions).
25 kVA 33/0.4 kV Aluminium Winding EcoDesign Transformer
  • 25 kVA 33/0.4 kV Aluminium Winding EcoDesign Transformer
  • 25 kVA 33/0.4 kV Aluminium Winding EcoDesign Transformer
  • 25 kVA 33/0.4 kV Aluminium Winding EcoDesign Transformer
SKU 25P33000S400-21
Brand Datsan
Conservator Tank:

Contact Thermometer:

Buchholz Relay:


Cable Box:

Pressure Relief Device:

Tank Material:

Cooling Surface:

Ambient Temperature:

Temperature Rise (Oil/Winding):


About us

Datsan Transformer has been established in 1992 especially to work in electricity industy. It has finished dozens of project successfully till 2006 and started to manufacture distribution transformers in 2006.

Datsan has manufactured over 10 thousand of distribution transformers till today and exported to more than 15 countries.

Contact to us

Datsan Elk.İnş Tic.Ltd.Şti.
Adr: Kızıltepe Mardin Karayolu
Kızıltepe, 47400 Mardin TURKEY

T : +90 (482) 215 3188
F : +90 (482) 215 1199


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