(Pearl Transmission) AN18-02: Analyzing the Breakdown of Mineral Oil under Thermal Stress using the Pearl

Viscous substances such as transformer oils are sampled easily with the Pearl™ with consistent pathlength.

Mineral oils are employed as thermal and electrical insulators in many power transformers. Thermal and electrical stress over the lifetime of the transformer results in the chemical breakdown of the oil, which can be monitored using FTIR spectroscopy and principal component analysis (PCA).

These chemical changes are accompanied by changes in physical properties such as viscosity, making consistent and reliable sampling of the oils a challenge. In particular, achieving a consistent pathlength for FTIR analysis becomes challenging. Here the Pearl^TM liquid transmission accessory, fitted with an oyster cell^TM, is advantageous as a consistent pathlength can be easily achieved even for the most viscous of oil samples.  

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