Transformer Insulating Oil Testing

Insulating liquids – the lifeblood of transformers

Transformers are designed to be in operation for 40 years or even longer. For the responsible body, their positive economic balance is heavily dependent on avoiding repair times and possible downtimes.

The insulating oil is a decisive criterion for reliable operation. Its ageing condition, which is affected by oxidation, thermal stress, and contact with other materials, essentially determines the service life of the transformer. With BAUR you have an expert partner by your side, enabling you to test the insulating liquid before the transformer fails. The insulating oil testers from BAUR enable you to ensure the reliable operation of your transformers.

Test insulating oil – avoid downtimes

Insulating oil ensures the safe operation of power transformers. In addition to traditional insulating oils, new insulating liquids, such as natural or synthetic ester, are an increasingly popular choice. When insulating liquids are used for cooling and electrical insulation, impurities or ageing can have a huge impact on insulation capacity and result in plant shutdown or even an accident.

In order to prevent this, national and international standards as well as statutory provisions require the regular testing of insulating liquids. The diagnostics of the insulating liquids provides detailed information on the quality of the refining, the purity of the oil, and ageing as well as dielectric losses and dielectric strength. During the quality analysis, the results must be used to determine whether the insulating liquid still provides effective insulation or whether it needs to be reconditioned or changed.

Testing insulating materials with BAUR – reproducible and precise results

Precise measurement methods are essential when analysing insulating oil. Our insulating oil testing and diagnostics devices and the ITS Lite software are therefore optimised for easy and faultless handling

automatic test cycles that conform to the standards
low measurement tolerance for reproducible results
clear, unambiguous display of the results
clearly arranged reports and user-friendly archiving

BAUR Transformer Oil Testers
Feature	DPA 75 C ACCU	DTA 100 C	DTL C
Type	Oil Breakdown Voltage Tester	Oil Breakdown Voltage Tester	Dissipation Factor Oil Tester
Key Functionality	Measures breakdown voltage of transformer oil	Measures breakdown voltage of transformer oil with automated processes	Measures dissipation factor (tan δ) of transformer oil, indicating oil quality and contamination
Power Source	Rechargeable battery-powered (ACCU)	Mains-powered	Mains-powered
Testing Standards	IEC 60156, ASTM D1816, ASTM D877 and more	IEC 60156, ASTM D1816, ASTM D877 and mor	IEC 60247, VDE 0380-2:2005_01 BS 5737:1979 and more
Measurement Range	Up to 75 kV	Up to 100 kV	Dissipation factor and relative permittivity measurements
Display and Interface	High-resolution touch display; user-friendly operation	High-resolution touch display; automated testing protocols	High-resolution touch display; dedicated to dissipation factor measurements
Automation Features	Automatic testing sequences; customizable test parameters	Fully automated testing; robust data analysis and export functions	Semi-automated for dissipation factor testing
Portability	High portability due to battery operation; suitable for on-site testing	Designed for laboratory and high-throughput testing	Designed for laboratory use
Data Export and Analysis	USB and PC connectivity; detailed report generation	USB and PC connectivity; advanced analytics and comprehensive report generation	USB and PC connectivity; focused on dissipation factor trends
Application Focus	Mobile testing in the field; robust for varied environments	High-volume laboratory testing; suitable for precise, repeatable measurements	In-depth analysis of oil insulation properties in laboratory settings
Unique Features	Battery operation; excellent for remote locations	High voltage range (100 kV); exceptional automation for breakdown testing	Specialized in dissipation factor measurement; provides precise insights into dielectric loss
Typical Users	Field engineers, maintenance teams	Laboratory technicians, transformer testing professionals	Oil analysis specialists, laboratory engineers