8KV oil Distribution Transformer single phase to three phase transformer

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$5,000.00 - $128,000.00 / Sets | 1 Set/Sets (Min. Order)
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Quick Details
Place of Origin:
Zhejiang, China
Brand Name:
Model Number:
Coil Structure:
Coil Number:
Tap changer:
Cooling method:
Rated power range:
High voltage range:
Connection Symbol:
Yyn0 / DYn11
Windings material:
Service Condition:
Outdoor / Indoor
single phase to three phase transformer
Iron core:
Silicon sheet
Low losses
Supply Ability
Supply Ability:
50000 Set/Sets per Year single phase to three phase transformer
Packaging & Delivery
Packaging Details
single phase to three phase transformer Main body in nude , the accessories packing in seaworthy standard wooden case
Shanghai or Ningbo port

8KV oil Distribution Transformer single phase to three phase transformer

Introduction To Products     

8KV oil-immersed Distribution Transformer single phase to three phase transformer

   The performance of our SZ-M9 series, SZ series 10kV and 35kV on-load-tap-changing voltage transformer conform to the standard of GB 1094-1996 “Power Transformer “ and GB/T6451-2008 “Technical Parameter and requirements of Three-phase Oil-immersed Power Transformer”. The iron core is made of quality cold –rolled silicon steel sheet , and in full-miter non-puncture . The coil is made of quality oxygen-free copper, featuring good outlook and safe running . The products are widely used in power transmission and distribution of industrial and agricultural power networks.


Main Function And Features 

8KV oil-immersed Distribution Transformer single phase to three phase transformer

01)  Load-ratio voltage regulation,high reliability, advanced level of performances, reasonable economical indicators, 

        so that its magnetic route is short, losses and noise level is low;

02)  Compress wire is adopted for winding so losses are low and have good ability withstand short-circuit;

03)  Its active part adopts special pressing method which could ensure reliable axial pressure;

04)  The oil tank is bell type with the structure of full folding plate type, having an excellent exterior and easy for maintenance;

05)  Adopting capsule-type oil container, it can reduce oil aging to the lowest degree.

06)  Amount of  local discharged:  The apparent discharge amount is less than 80pC under the 1.5 times of rated voltage;

07)  Noise: Products of 63MVA and below is lower than 58dB(AN);

08)  Power loss: no-load loss is 30% lower than that of IEC standard;

09)  Reliability: All in-service product have no damages or oil leakage occurred;

10)  The oil tank is in two types-fully enclosed type and the type fitted with an oil conservator.



1)  The high-voltage(HV) coil adopts an interleaved-continuous structure to improve the voltage characteristics under impact

      voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable insulation.

2)  In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the

      temperature rise of the winding and the hot points of the winding and prolong the service life of insulation.

3)  The HV and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of

     each winding-up,  effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve

     abrupt short-circuit withstanding capacity.

4)  The winding adopts radial “0” margin designed,  between the core and the paper sleeve of LV winding,and between the LV,

      HV, voltage-regulating windings, as well as before insertion of stays and shroud plate they are fully dried and tightly

      matched to ensure extremely good compactness and concentricity of the entire winding.



1)  The core is made of high-permeable grain-orientated top quality cold-rolled silicon sheet and the material is cut with

      advanced Germany Geoge GmbH automatic shear line with the cut burrs controlled within 0.02mm.

2)  The silicon sheet fabrication adopts “no-upper yoke-lapped’ technology and all lapped joints of the silicon sheet are 45 full-

      miters. The laminated core sheets are integrally pressed and adhered with epoxy resin to make the three –leg two-yoke

      core a strong and flat integral one with good verticality precision, this effectively improves no-load performance and reduces


3)  Bracing plates are used as support between coil leg and inner coil.  The iron yoke is tied with epoxy resin-impregnated

     glass fiber band, and the lower section of oil tank is tightened with counter-pressure bolts. The upper iron and the upper

     section of oil bank are fixed at this locations. Hence the body inside the oil tank can withstand the vibration during

     transportation without any shifting.


Oil tank and accessories       

1)  The tank wall adopts wide steel sheet, which will be folded into corrugated structure without splicing , in this way welds are

      decreased and mechanical strength is enhanced ; meanwhile , the corrugated wall has diverging effect, and thus plays a

      role in decrease of noise.

2)  The routing troughs and control cabinets of the secondary circuit are all made of stainless steel , so the entire transformer

      has a simple and good looking.       

3)  All sealing surface use quality sealing material and are precision-machined.       

4)  On the edge of the tank there are  double sealing grooves, and the outer sealing material is used to shade the atmosphere

      and ultra-ray to protect the inner sealing being damaged, thus at utmost prolonging service life and enhancing reliability of

      the seal.



1)  As we have good cooperation tie with many subassembly manufacturers of famous transformer brands, we are able to

      provide different subassemblies as per users’ requirements .

2)  The whole procedure of manufacture , R&D and sales service are carried out strictly in accordance with international

      standards and ISO quality management system .


Main Technical Parameters for 10kV Level SZ9-M, SZ10-M, SZ11-M Series                

three-phase full sealed on-load-tap-changing distribution transformer: 

Rated power

High Voltage

H.V Tap range

Low Voltage

Connection Symbol

Short-Circuit Impedance

No-load Loss

On-Load Loss

No-load Current
9 Type10 Type11 Type9 Type10 Type11 Type
















Verified Information  


Production Flow





We look forward to cooperating with you , if any inquiries , please contact us freely !


Thank you!