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Quick Details

  • Place of Origin: Beijing, China (Mainland)
  • Brand Name: Daelim
  • Model Number: SFZ9 SFZ10 SFZ11
  • Usage: Power
  • Phase: Three
  • Coil Structure: Toroidal
  • Coil Number: 2 winding
  • Product name: Step Up Three Phase Transformer 110/35kv 30mva with Copper Winding
  • Rated capacity: 30mva
  • Rated voltage: 110kv
  • Frequency: 50Hz/60Hz
  • Material: Copper Winding
  • Type: Three Phase
  • Connection Symbol: Ynyn0d11
  • Cooling system: ONAN&ONAF
  • Standard: IEC60076
  • Certification: ISO9001:2008

Packaging & Delivery

Packaging Details International standard package ,proper for any special customer air or sea requirements,one set one case
Delivery Time 30 Days after confirm the drawing

Price of Step Up Three Phase Transformer 110/35kv 30mva with Copper Winding

Product Description


220kv,110KV and 66kv low-loss series transformer is our independently new gereration of transformers on the basis of absorption of domestic and foreign advanced technology ,which features low local discharge ,low loss,low noise ,high reliability ,strong protection against abrupt short circuit .its excellent performance has been recognized by wide users and highly appraised by experts .The full-sealed suspending-cover free products sell well nationwide.

Amount of local discharge:The apparent discharge amount under1.5 times of rated voltage is less than 80 PC.

Noise :Products of 63MVA and below is lower than that of IEC standard;

Reliability : All in-service products have no damages or oil leakage occurred ;

Short circuit withstanding : Model SFZ11-50000/132 smoothly passed the short-circuit withstanding test of the national transformer quality supervision and inspection center.



The high-voltage coil adopts an interleaved structure to improve the voltage charateristics under impact voltage and make voltage evenly distributed .All stays and pads are chamfered to keep highly reliable insulation .

In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding and the hot points of the winding and prolong the service life of insulation.The HV and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of each winding,effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve abrupt short-circuit withstanding capacity.

  The winding adopts radial “0”margin design ,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 tighly matched to ensure extremely good compactness and concentricity of the entire winding.


   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.

   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 noise.

   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 iron yoke and the lower section of oil tank is tightened with counter –pressure bolts.The upper iron yoke and the upper section of oil tank are fixed at 3 locations. Hence the body inside the oil tank is tightened with counter-pressure bolts.The upper iron yoke and the upper section of oil tank are fixed at 3 locations.Hence the body inside the oil tank can withstand the vibration during transportation without any shift.

Oil tank and accessories

   The tank wall adopts wide steel sheet ,which will be folded into corrugated stucture without splicing,in this way welds are decreased and mechanical strength is enhenced ;meanwhile,the corrugated wall has diverging effect,and thus plays a role in decrease of noise.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.

   All sealing surfaces use quality sealing material and are precision- machined .

   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 service life and enhancing reliability of the seal.



   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. The whole procedure of manufacture, R&D and sales service are carried out strictly in accoudance with international standards and ISO quality management system.

Main Technical Parameters for 10KV Three-phase Oil-immersed transformer exclusive for petrifaction
No-load loss(kW) On-load loss(kW)No load
0.4   0.415Dyn11
40.13 0.60 2.1 
500.17 0.87 2.0 
630.20 1.04 1.9 
800.25 1.25 1.8 
1000.29 1.50 1.6 
1250.34 1.80 1.5 
1600.40 2.20 1.4 
2000.48 2.60 1.3 
2500.56 3.05 1.2 
3150.67 3.65 1.1 
4000.80 4.30 1.0 
5000.96 5.10 1.0 
6304.51.20 6.20 0.9 
8001.40 7.50 0.8 
10001.70 10.30 0.7 
12501.95 12.00 0.6 
16002.40 14.50 0.6 
20002.60 19.80 0.6 
25003.00 23.00 0.6 


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Our Services

1. We offer the best solution and products to fulfill the buyers' requirments.

2. We can arrange technicians to install the equipments and train your staff on site.

3. Anytime, we provide considerate technical consultation.

4. Prompt reply for your inquiry and feedback.

Packaging & Shipping

Our mode of transport, we are your best business partner.



Q:How long have you been worked in electric industry?

A:We have been worked in electric industry for nearly 20 years.

Q: How long is your delivery time?
A: Generally it is 20 days if the goods are in stock. or it is 30 days if the goods are not in stock, it is according to quantity.

Q: Which market do you already sell? 

A: We already ship to Europ, Middle East, South America, Asia, Afria etc. 
Q: What is the standard of package? 
A: Export standard package or special package according to customer requirement
Q:Why choice  Daelim?
A:After compare quality,delivery and price you will find out answer.

Company Information

Beijing Daelim Green EP Tech Co., Ltd. is mainly engaged in the import & export of electric products and equipment. Our business team has more than 15 years' foreign business experience, and also has a unique understanding of electrical products and overseas markets. We have established and extended business relationships with customers and partners in Southeast Asia, the Middle East, Europe, Africa, North America and South America.

The main products and equipment we are dealing with: power transformer, current transformer, potential transformer, vacuum & SF6 circuit breaker, load break switch, disconnector, switchgear panel, power plant, transmission line equipment.

We provide competitive prices, high quality products, timely shipment and efficient services to develop our cooperation with all of our customers. We are trading in accordance with international traditions and practices. We would like to extend business with our customers and partners on the basis of cooperation and mutual benefit..



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