33kV Fully Sealed Three-phase Oil-immersed Power Distribution Transformer（S11-M Series）

Product overview

  - Low loss, energy saving and environmental protection, 30% lower than S9 transformer loss
  - Product actual measurement is better than GB and IEC standards, CB CCC KEMA SASO certification
  - More than 50 countries and regions around the world run verification of high reliability
  - It is mainly used in 33KV distribution network, power supply and distribution system of industrial and mining enterprises and civil buildings
  - Products are sold 12598 sets to Uganda, Ethiopia, Tanzania, Zimbabwe, Ghana, South Africa, Kenya, Zambia, Rwanda and other countries.
  - Executive standard: IEC 60076 series, IEC 6013, IEC 60214-1, IEC 60296;GB1094 series, GB/T6451-2015, GB/T7597-2007, etc

Product advantage

> Leading technology
 - High voltage copper strip winding technology, improve lightning resistance
 - Low voltage copper foil winding technology, high quality A class insulation material insulation
 - Small magnetic leakage, high mechanical strength, strong resistance to short circuit
 - Core 45° fully oblique joint stepping laminated structure

> The shell
 - Japanese mitsubishi laser cutting machine and numerical control punching, reducing, folding and other equipment to ensure the accuracy of processing
 - ABB robot automatic welding, laser detection, to avoid leakage, pass rate of 99.99998%
 - Electrostatic plastic spray treatment, 50 years do not take off the paint (coating corrosion resistance within 100h, hardness ≥0.4)
 - Sealed structure, maintenance-free, normal operation life of more than 30 years

> The iron core
 - The iron core is made of high quality cold-rolled grain oriented silicon steel sheet with mineral oxide insulation (from Baosteel and WISCO of China).
 - By controlling the cutting and stacking process of silicon steel sheet, the loss level, no-load current and noise can be minimized
 - The iron core is specially reinforced to ensure the structure of the transformer is firm during normal operation and transportation

> Winding
 - The low voltage winding is made of high quality copper foil with excellent insulation resistance
 - The high-voltage winding is usually wound with insulated copper wire, using the technology patented by hengfengyou electric
 - It has very good ability to bear radial stress caused by short circuit

> High quality material
 - Baosteel and WISCO produce silicon steel sheets
 - China's high quality oxygen free copper
 - CNPC (Kunlun Petroleum) High quality transformer oil (25#)

> Other Notes
 - The low voltage outlet terminal is tin-plated copper bar
 - High voltage outlet terminals are ring - type tin-plated bolts
 - Default NLTC (no Load tap changer) ,OLTC（on load tap changer） can be customized.Tap switch 5 or 7 adjustment
 - Transformers above 630KVA are equipped with gas relay protection

> Patent technology
 - Thanks to the patented technology of "ultra-low loss energy-saving power transformer" of Hengfengyou Electric, the material can be saved by 5%, and the loss of the transformer can be reduced by 10-20% compared with similar products in the market, which is more energy saving and environmental protection.



Conditions of use

  - Altitude less than 1000m, air temperature -25℃~40℃, humidity less than 90% (+25℃)
  - The vertical incline should not exceed 5°, there is no severe vibration place, and the outdoor wind speed should not exceed 35m/s
  - No gas or conductive dust that seriously affects the insulation of the transformer;No explosion hazard, no corrosion of electrical components
  - If the above normal operating conditions are exceeded, customers can customize the solution with our company


Roduct parameters

  - Input voltage: 33kV
  - Output voltage: 0.4kV 0.415kv 0.420kv 0.44kv
  - Capacity: 30-25000 kva
  - Frequency: 50HZ/60HZ
  - Voltage regulation mode: NLTC (no Load tap changer)
  - Remark: voltage, capacity, frequency, connection group and loss can be customized according to customer requirements