• Transformer Oil

Transformer Oil

1.Standard IEC296-2003 2.10-Year Warranty 3.Best price Best service 4.Delivery in time 5.Blended from specially refined, low viscosity base stocks with premium anti-oxidants containing no hazardous substances. Please contact us! Email:liujing@mec.com.cn

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Skype: liujingmec
For transformer oil after hydrogenation, the total naphthenic hydrocarbon content is almost the same as naphthenic base transformer oil.

Comparison of composition in naphthenic of transformer oil(measured by gas chromatograph-mass spectrometer)


Hydrogenated transformer oil No.25

Naphthenic base transformer oil No.25

Hydrogenated transformer oil No.45

Naphthenic base transformer oil No.45

Total naphthenic hydrocarbon,%





 Operating under extremely low temperature or temporary stopping in winter, transformer shall be able to prevent floating ice in oil to the most extent. The floating ice won′t affect operation of transformer. However, when temperature rises, the floating ice will become liquid water after melting, If the water flows to electrode zone, it will obviously reduced breakdown voltage to cause discharge danger. Under 0°C and one atmospheric pressure, density of pure ice is 917kg/m³,which actually will change among range of 880kg/m³-920 kg/m³.The larger density difference between transformer oil and floating ices, the easier control the appearance of floating, Generally, density of transformer oil shall be no more than 895 kg/m³ under 20°C. With higher carbon and hydrogen ratio in alkane of floating. Generally, density of chain, so density of naphthenic base transformer oil is slightly higher. However, SINOPEC transformer oil manufactured on the basis of hydrogenation maintains the advantage of low density, which ensures use safety under low temperature.  

 Because transformer oil is used for heat transmission rather than lubrication, the  transformer oil with tower viscosity better while ensuring flash point and other safety indexes. The lower the viscosity,  the better fluidity of oil for heat transmission. In addition, transformer oil should also provide lower low-temperature viscosity, which ensures transformer oil can be normally activated after stopping in cold winter. SINOPEC transformer oil provides proper high-temperature viscosity and good low-temperature viscosity benefiting heat transmission and low-temperature startup.

 The transformer oil manufactured by hydrogenated base oil not only maintains good electrical property and other quality advantages of solvent refining transformer oil, but also eliminates pour point difference with naphthenic base transformer oil, and provides more advantages than naphthenic base oil on density, flash point and oxidation stability etc.

Company Profile

We are a professional player in transformer industry,  our annual total production capacity is about 18,000,000 KVA, our factory covers an area of 370,000 square meters and a building area of 100,000 square meters, with total assets of 350 million CNY and more than 1000 staff members with engineering and technical employees accounting for 21%.
Our main products include 220kV and below&200MVA and below oil immersed power transformers, 110kV and below furnace transformers, 110kV and below rectifier transformers, 35kV dry type transformers, 35kV combined transformer substation, 35kV and below amorphous alloy transformer, 35kV and below reactor etc. All of our products' performance measures up to the standards established by International Electric Committee (IEC).
We have many advanced production and testing facilities which imported from Germany and Japan, such as silicon sheet shearing automatic lines, automatic and continuous extrusion lines of electromagnetic wires, Kerosene vapor vacuum drying systems and more than 1,500 sets of production and complete testing systems for professional transformer production and other testing equipment. We can meet the requirements of customers completely.
 We have obtained ISO9001 quality management system and ISO14001 environmental management system certifications and in strict accordance with these standards in our routine.
We also obtained the CE certificate, CTQC test report, Nation Standardization Management AAA Certificate, National Measuring System Certificate and others. Many prizes also have been awarded to us in the past years by the relevant national Authority and local government.
Owing to our good reputation on quality and service, our products have been exported to more than 20 overseas countries and regions.
We sincerely hope we can provide you with best products and satisfied service, and you are always warmly welcome to visit us.


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