• S9, S10 Series 10kv~35kv Step Down Oil Immersed Distribution Transformer

S9, S10 Series 10kv~35kv Step Down Oil Immersed Distribution Transformer

The iron core is made of cold rolled grain oriented silicon steel sheet. Laminations are cut to length onGEORG cut to- length line with steplap cut and automatic stacking functions. Test Equipment: IEC Standard Frequency: 50Hz Trademark: Tianan Electric

Product Details

Quick Details


  • Model NO.: S(Z)9/S(Z)10/S(Z)11
  • Phase: Three
  • Cooling Method: Oil-immersed Type Transformer
  • Certification: ISO9001-2000, UL, ISO9001, CCC, CE & Pccc & Ohsas18001
  • Frequency Characteristics: Power Frequency
  • Brand: Tianan
  • Altitude: up to 1,000m Above Sea Level
  • Special Conditions: Depends on The Customer
  • Tap Changer: Regulate The Output Voltage
  • Typical Products: S9, S10 Series 10kv~35kv
  • Warranty: 10 Years
  • Specification: IEC60076-1, IEC60076-2, IEC60076-5
  • HS Code: 850423110
  • Application: Power, Electronic, Instrument, Rectifier, Industry
  • Core: Core-type Transformer
  • Winding Type: Multi-winding Transformer
  • Usage: Power Transformer
  • Shape of Core: EC
  • Tank: Corrugated Steel Plate
  • Environment: Outdoor
  • Insulation Oil: High Quality Grade Mineral Oil
  • Test Equipment: IEC Standard
  • Frequency: 50Hz
  • Trademark: Tianan Electric
  • Origin: Xiangshan Zhejiang P. R China

1. General 
(1) Application:

    >> 12, 24,36KV class transformers are widely used in power transmission and distribution stations, 
          industry plants, Generation Setup Unit (GSU). 
    >> They have the characteristic of high efficiency, low loss and maintenance free.     

(2) Type and Rating 
     **Capacity range :50-50000KVA.
     **Secondary voltage: 415V ,400V etc.
     **Frequency :50Hz ,60Hz.
     **Type: Single phase ,three phase.
     **No-load tap changer and on-load tap changer.
     **ONAN and ONAF.
     **Set-up and set-down type.
(3) Standard:  IEC60076-1, IEC60076-2, IEC60076-5, IEC60317, ANSI, IEEE, AS, etc.

2. Conditions of service
(1) Altitude:  Up to 1,000m above sea level.
(2) Ambient temperature: 
      **Max: +40ºC.
      **Average (daily, Max.): +30ºC.
      **Average (yearly, Max.): +20ºC.
      **Min: -45ºC.
(3) Environment:  Outdoor.
(4) Special conditions:
      It may be consulted between manufacturer and customer.

3. Structural Features
(1) Iron core 
     The iron core is made of cold rolled grain oriented silicon steel sheet. Laminations are cut to length 
     onGEORG cut to- length line with steplap cut and automatic stacking functions. 
     The multistep lamination structure can reduce the loss and noise .
     The steel sheet in the core limbs and yokes are clamped together by glass-epoxy bonds.
(2) Winding 
      High quality enameled or paper covered  copper is used as conductor, the winding was made as 
drum type, spiral type, improved spiral type, continuous type and interleaved type to ensure the insulation strength. Standard tapings are ±2*2.5%of the HV winding.
(3) Tank 
    The tank, cover and the conservator are made by corrugated steel plate .For the small transformers, 
we use a deep tank and a cover, but for larger transformers, we manufacture bell type .The corrugated construction are a effective way for oil cooling.
(4) Insulation oil 
       The tanks are filled with high quality grade mineral oil as per IEC296 and it is PCB and PCT free. 
The oil is used to help cooling the transformer. It is also used provide part of the electrical insulation between internal live parts.
(5) Tap changer 
       Tap changers are used to regulate the output voltage of the transformers to required levels .We 
achieve this by changing the ratios of the transformer on the system by altering the number of turns in the HV winding .Tap changers can be on load (OLTC) or off load(OCTC).
(6) Assembly
       The core and the windings assembled together from the active part of the transformer.  The active 
body assembled with multi-windings and identical pressure dry method adopted, effectively improved
the electrical strength and the ability to short circuit withstanding.

4. Test equipment
       Strict test should be done according to IEC standard, by high technical equipments to ensure the 
quality and the reliable of every transformer.


S9, S10 Series 10kv~35kv Step Down Oil Immersed Distribution Transformer

Company Profile

Ningbo Tianan (Group) Co., Ltd. Was founded in 1969, is a national large

Enterprise, national key high-tech enterprise, industry key enterprises and Zhejiang provincial leading enterprise in power transmission and transforming

Industry. Under the company there are 1 R&D center, 10 specialized subsidiary

Companies, and more than 70 marketing offices. There are more than 2500 emplo--yee working in headquarter. The total asset sums up to 3.8 billion yuan (RMB).

The output value sums up to 5.0 billion yuan (RMB). Group competitiveness ranks in the first 225 in China's top 500.

Tianan Group is one of the domestic manufacturers and scientific research

Enterprises of power transmission and transforming industry featuring largest scale, most variety, full specifications, and best quality. Besides, the company owns abundant technical development strength, the international first-class production

And test equipments, efficient and flexible management mechanism, a great

Number of outstanding professional talents. "Quality is personality" is our concept. It has sufficient quality management system and quality assurance, all over the world's sales service network. All the above constructs excellent resources support system for customers.

Now the products include 126kV GIS combination apparatus, SF6 circuit breaker, 126kV&252kV power transformer, 252kV and below 252kV outdoor HV disconnecting switch and transformer, boxtype substation below 40.5kV, ring main unit

Switchgear, midmount switchgear, fixed switchgear, GIS, L. V. Switchgear, frequencyconversion switchgear, H. V. Load switch, H. V. &L. V. Circuit breaker, cable (RMU)

Branch box, fuse, current transformer (CT), dry-type & oil-immersed transformers,

High-voltage inverter speed regulation device, high-voltage static reactive power

Generator, active power filter, intelligent electric equipments, etc. The products

Are widely used in nuclear power plant, chemical plant, railway, underground,

Airport, national defense, Beijing Olympics and main national, provincial and municipal construction projects.

Tianan has already obtained "China's well-known trademarks ", "China's brand

-name products ", "National Product Exempting from Inspection ". The ISO9001 quality guarantee system, the ISO14001 environment management system and

The OHSAS18001 occupation healthy safety control system through the national authentication, "CCC", "PICC" authentication certificate, which Tianan obtained comparatively early. The products cover all over the country and abroad five continental countries. Especially, our products applied to the Shenzhou V, Shenzhou VI,

Shenzhou VII manned spacecraft and the construction of Qinghai-Tibet railway. The practice has proved Tianan's products have the outstanding performance

That can withstand the test of bad environment.

In recent years, many prizes have been awarded to Tianan, such as: National May1st Labor Prize, National Innovation-based Pilot Enterprise, National Mechanical

Industrial Management Demonstration Enterprise, National Mechanical Industry

Civilized Company, Zhejiang Province "a group of five" key business, Province Quality Control Prize and so on. Chairman of the Board Jiang Baomin is the national model labor and the outstanding entrepreneur.

The "Tianan Electric town" which covers an area of more than 600, 000 square

Meters and RMB 1.2 billion has been invested has been put to use. To the end of 2011, Tianan has put it into an integrated, intellectualized and modernized

Enterprisewith the combination of scientific research, manufacturing, management and culture as "the aircraft carrier" in power transmission and transforming


Seeing is believing, Tianan Group sincerely welcome all new and old customers

And friends come to our company for a visit or inspection.


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