The aim of this document is to present how the interpretation of the RVM (Recovery 12 Voltage Measurement) test can be improved through the use of a Debye equivalent circuit. As it is 13 described in the literature the interpretation of the RVM test requires expertise and if the 14 transformer presents a high interfacial polarization it is not possible to diagnose it in detail. Debye 15 model is proposed in this work for enhancing RVM interpretation. This model is based on an 16 electrical circuit that includes basic R-L-C components, that allows two interesting features: on one 17 hand, isolation physical effects can be separately represented and, on the other, the values of the R18 C components can be calculated from the RVM response (L components are not used in this work 19 as long as no magnetic field effects are taken into account). Thus, the different isolation effects that 20 are indistinguishable merged in the RVM transient response can be split into different R-C branches, 21 each one corresponding with a single (not merged) isolation effect. Finally, several case studies are 22 presented, in which it is correlated a dielectric oil treatment carried out and the equivalent circuit 23 changes. 24
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