Our factory can produce voltage with 500kV and below, capacity 1000MVA and below series oil immersed power transformers.
digesting the advanced technology at home and abroad, combined with the advanced technology at home and abroad and our company's experience in producing power transformers for many years, 
Through optimization and innovation, we have successfully produced a series of power transformers with low noise, low loss, low partial discharge and high short-circuit resistance,
Fully comply with and superior to national standards and International Electrotechnical Commission recommended standards.

Transformer Main functions and characters:
Bell type tank and the wave form shell.; Increase the strength of oil box, beautiful appearance;
Core is with D shape yoke, 45 angle seaming;
Core and oil box are well fixed and well protected on moving;
Reasonable wrapping method, in the interior and exterior structure of coil; Use support; Hard paper bucket
between coils increases the capacity of anti-shortcut;
Advanced assembling method such as cold pressing and welding technology, installing with sets of coil, paper
bucket production.

Technical parameters:
SFZ-40000/33 Power transformer
Name: Three-phase windings OLTC dual immersion air-cooled power transformers
Type: SFZ-40000/33
Rated voltage: 33/6.9kv
Rated power: 35000/40000kVA
Rated voltage ratio: 33± 3× 2.5%/6.9kV
Rated currency: 700/3347A
PHASE: THREE PHASE
Rated Frequency: 50Hz
Connection Symbol: Dyn11
Tap changer: On load tap changer
Impedance voltage%: 13+0.8%
Cooling way: ONAN/ONAF
Winding Insulation Level
Lightning impulse withstand voltage(Kv, peak value) 1 min Frequency Pressure(kv, virtual value)

Full-wave
Latest wave

HIGH voltage SIDE: 170 185 75
Low voltage side: 75 85 35
Low-voltage neutral point: 75 35

Insulation class Class A
Transformer windings of the Inter-field strength is not more than 2 Kv / mm
Transformer loss (below 75), the no-load current and efficiency
No-load loss: 21 kW
Load loss: 198 Kw
No-load current: 0.5%
Radio frequency interference and Corona
To the greatest work of the voltage, outdoor sunny evening out line without visible Corona, radio interference voltage is not more than 2500
UV.
 
Our Best Service For You
1. Pre sale service
A. Make technical solution
B. Send quotation, technical data sheet and drawing
C. Prepare power transmission plan, testing plan,and shipment plan
2. In sale service
A. Supervise the manufacturing schedule totally in accordance with the plan
B. Send photos to customer during every manufacturing process(hold point)
C. Inform the customer one week before testinng.
3. After sale service
A. Installation and commissioning, training the workers
B. Quick response within 12 hours any time
C. Provide 12 months gurantee period normally.

Thanks for choosing VILLE as your reliable partner and please trust both
of us will create a brilliant future!