Control of the degradation of the mineral transformer oils hydrocarbon base

Currently, the degree of degradation of the oils hydrocarbon base remains outside the field of vision of operating services. The aim of this work was to analyse the process of regeneration of aged mineral transformer oils using adsorption cleaning. IR spectroscopy shows that the hydrocarbon composition of oils undergoes changes during operation. And those changes are cannot be restored. We propose the concept for the control of destruction degree of the mineral oils hydrocarbon base. The suggested criterion based on the IR method may be used when decision is making whether the transformer oil should be replaced with a new one.