Product Data Sheet
Product Sinopec Transformer Oil
Summary Product description
Sinopec Transformer Oil is a series of products blended using highly refined
mineral oil and a selected antioxidant. It is designed for insulating and cooling
transformers, oil-immersed switch-gear and other electrical insulating
applications. There are four grades, 10, 25, 40 and 45, which are selected on
the basis of their low-temperature performance. None of the grades contain
harmful polychlorinated biphenyls (PCBs).
Applications
Sinopec Transformer Oil is suitable for use in:
• Oil-filled transformers, operating at 330 kV or less, where it acts as a non-conducting insulating and cooling medium.
• Oil-immersed switch-gear.
• Other electrical insulating applications.
Features and benefits
• Excellent dielectric (insulating) properties, effectively prevent discharge in an electric field.
• Low viscosity and low density lead to the oils having good cooling properties and good heat transfer characteristics at
room temperature and below, and so ensure effective cooling of transformer core and coils.
• Even at very low temperatures the oil viscosity remains low, and therefore allows the transformer to be started up
under very cold conditions without problem.
• Excellent oxidation stability characteristics are provided by the stable base oil together with the high-performance
oxidation inhibitor system, and prevent the formation of acidic material and sludge in service, extending the life of the
oil.
• All four grades meet the requirements of IEC 60296:2003 for transformer oils.
The information contained herein is subject to change without notification due to continuing
research & development therefore properties may be subject to slight variations.
PERFORMANCE IN MOTION
Product Data Sheet
Typical data
Sinopec Transformer Oil
Grade 10 25 40 45
Kinematic viscosity, ASTM D 445
cSt @ 40°C 8.93 9.34 9.91 9.25
cSt @ –10°C – 116.0 – –
cSt @ –30°C – – 423.4 753.0
Neutralisation number, mg KOH/g, ASTM D 664 0.46 0.22 0.59 0.63
Oxidation stability, 164 h @ 120°C, IEC 61 125C
total acidity, mg KOH/g 0.04 0.02 0.0822 0.0218
sludge, wt% 0.01 0.008 0.0075 0.0175
Corrosive sulfur, ASTM D 1275 B not corrosive not corrosive not corrosive not corrosive
Breakdown voltage, kV, IEC 60156 50 47 50 53
Dielectric dissipation factor @ 90°C, IEC 60247 0.0009 0.0007 0.008 0.0001
Interfacial tension, mN/m 49.1 47.3 47.1 48.7
Pour point, °C, ASTM D 97 –12 –27 –45 –51
Flash point (PMCC), °C, ISO 2719 162 153 158 154
Density @ 20°C, kg/l, ASTM D 4052 0.8486 0.8330 0.8378 0.8354
These data are given as an indication of typical values and not as exact specifications.
Industry and OEM specifications
Sinopec Transformer Oil meets the performance requirements of the following industry specifications:
1
GB 2536-90 (Sinopec 10, 25 and 45 Transformer Oil)
IEC 60296-2003 (Sinopec 10, 25, 40 and 45 Transformer Oil)
Sinopec Q/SH 303 525-2009
1
Note: ‘GB’ standards are the National Standards of the People’s Republic of China.
Sinopec Transformer Oil holds the following formal OEM approvals:
ABB Specification 1ZBA117001-1:
HI-B (Sinopec 25 Transformer Oil)
HI-A (Sinopec 45 Transformer Oil)
Siemens TUN 901 293 (2007) (Sinopec 25 and 45 Transformer Oil)
The information contained herein is subject to change without notification due to continuing
research & development therefore properties may be subject to slight variations.
PERFORMANCE IN MOTION
Product Data Sheet
Accuracy of information
Data provided in this PDS is typical and subject to change as a result of continuing product research and development. The
information given was correct at the time of printing. The typical values given are subject to variations in the testing procedures
and the manufacturing process may also result in slight variations. Sinopec guarantees that its lubricants meet any industry and
OEM specifications referred to on this data sheet.
Sinopec cannot be held responsible for any deterioration in the product due to incorrect storage or handling. Information on best
practice is available from your local distributor.
Product and environmental safety
This product should not cause any health problems when used in the applications suggested and when the guidance provided
in the Material Safety Data Sheet (MSDS) is followed. Please consult the MSDS for more detailed advice on handling; MSDSs
are available from your local distributor. Do not use the product in applications other than those suggested.
As with all products, please take care to avoid environmental contamination when disposing of this product. Used oil should be
sent for reclamation/recycling or, if not possible, must be disposed of according to relevant government/authority regulations.
The SINOPEC trademark is registered and protected in Australia.
Issued: September 2011
© Sinopec 2011 27_Sinopec-Transformer-Oil
The information contained herein is subject to change without notification due to continuing
research & development therefore properties may be subject to slight variations.
PERFORMANCE IN MOTION
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