This paper presents equipment for early detection of failures in the insulation of power transformers, checking existing partial discharges inside. The equipment involves hardware, control and signal acquisition software, and signal analysis software. This equipment has a set of algorithms that were made with intelligent extraction techniques and interpretation of data. The degradation diagnosis of the equipment insulation is based on digital signal processing algorithms for extraction of features and also in artificial intelligence algorithms that allies a mining involving all the data linked to the equipment throughout its operating life can make an assessment of the operating conditions of the equipment and suggest interventions and provide an estimated time so that they have to be made.
 A. A. A. Esmin and G. Lambert-Torres, “Application of Particle Swarm Optimization to Optimal Power Systems,” International Journal of Innovative Computing, Information and Control, Vol. 8, No. 3A, 2012, pp. 1705-1716.
 E. L. Bonaldi, L. E. L. de Oliveira, J. G. Borges da Silva, G. Lambert-Torres and L. E. Borges da Silva, “Predictive Maintenance by Electrical Signature Analysis to Induction Motors,” In: R. Araujo, Ed., Induction Motors—Modelling and Control, InTech, Croácia, 2012, pp. 487-520.
 C. H. da Silva, R. R. Pereira, L. E. Borges da Silva, G. Lambert-Torres and J. O. P. Pinto, “New Strategies for Application of Adaptive Filters in Active Power Filters,” IEEE Transactions on Industry Applications, Vol. 47, No. 3, 2011, pp. 1136-1141. http://dx.doi.org/10.1109/TIA.2011.2125931
 H. G. Arango, A. C. Z. de Souza, G. Lambert-Torres and A. P. Alves da Silva, “Difference between Regular and Deterministic Chaos Processes Based on Time Analysis of Load: An Example Using CEMIG Data,” Electric Power Systems Research, Vol. 56, 2000, pp. 35-41. http://dx.doi.org/10.1016/S0378-7796(00)00095-X
 Y. Tian, P. L. Lewin, S. J. Sutton and S. G. Swingler, “PD Characterization Using Wavelet Decomposition of Acoustic Emission Signals,” Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, Toulouse, France, 2004.
 G. F. C. Veloso, L. E. Borges da Silva, I. Noronha, G. Lambert-Torres, J. Haddad, R. R. Pereira and S. U. Ahn, “Detection of Partial Discharge in Power Transformers Using Rogowski Coil and Multiresolution Analysis,” Journal of Energy and Power Engineering, Vol. 4, No. 2, 2010, pp. 39-45.
 S. A. Boggs, “Partial Discharge: Overview and Signal Generation,” IEEE Electrical Insulation Magazine, Vol. 6, No. 4, 1990, pp. 33-39. http://dx.doi.org/10.1109/57.63057
 G. J. Paoletti and A. Golubev, “Partial Discharge Theory and Technologies Related to Medium-Voltage Electrical Equipment,” IEEE Transactions on Industry Applications, Vol. 37, No. 1, 2001, pp. 90-103. http://dx.doi.org/10.1109/28.903131
 L. E. Borges da Silva, L. E. L. de Oliveira, L. E. L. de Oliveira, V. F. da Silva, J. O. P. Pinto and B. K. Bose, “Improving the Dynamic Response of Active Power Filters Based on the Synchronous Reference Frame Method,” Proceedings of the Applied Power Electronics Conference, APEC2002, Dallas, 10-14 March 2002, Vol. 2, pp. 742-748.