This diagnosis technique is used to analyze electric motors, generators, transformers, distribution systems and other electrical equipment. With this new technology they can be carried out tests of the electric equipment on-line as off-line and this way to be able to identify a series of electric and mechanics problems. With this diagnosis technique you can analyze the load, the driver and the supply source. For it is used it an analyzing device which picks up currents and voltages to make the analyses and display them in a screen.