Transformer Oil Testing

Transformer oil and insulating oil tests, from our Total Quality Experts.

Intertek's TransoilCHECK© program provides transformer oil and insulating oil analysis and testing on a global basis. The laboratories test for transformer oil purity, quality, and chemical composition. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. Specific transformer oil test method availability will vary depending upon location. Please contact Intertek for more information.

Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. General and physical tests are suggested twice a year, dissolved gas analysis once a year, and Furan testing every 2 years for transformers in operation at least 5 years. Samples are easily shipped to Intertek laboratories providing transformer oil analysis, on a global basis. Insulating oil and transformer oil testing labs are located in the United Kingdom, United Arab Emirates, Singapore, Africa, Mexico, Spain, and other locations. The labs test insulation oil samples from clients across the world.

Transformer oil tests	Transformer oil test methods
Appearance at 15°C	ASTM D4176
Water Content	ASTM D1533B, D6304
Density at 15°C	ASTM D4052
Specific Gravity	ASTM D4052
Suspended Particles in Oil	Visual
Dielectric Breakdown Voltage	ASTM D877
Sediment, Sludge	BS 5730
Interfacial Tension	ASTM D971
Kinematic Viscosity	ASTM D445
Color	ASTM D1500
Neutralisation Value mg KOH/g	ASTM D974
Flash Point	ASTM D92
Pour Point ° C	ASTM D97
Particle Count (NAS 1638,ISO 4406)	Automatic Particle Counter
Dissolved Gas Analysis	ASTM D3612
Trace Gases Analysis:
Carbon Dioxide, Carbon Monoxide ppm
Acetylene, Ethylene ppm
Oxygen, Nitrogen ppm
Methane, Ethane ppm
Hydrogen ppm
Total Dissolved Combustible Gases ppm
Composition of insulating oils by petroleum origin	ASTM D2140
Dissipation Factor at 100°C	ASTM D924