Due to our many years of experience diagnosing tranformers and our expertise in the related areas of power quality, modelling and simulation, we are able to understand all the different aspects of a problem and to work out a solution systematically. We draw on our many years of practical experience, and on our in-depth understanding of the different kinds of assets which we combine with our expert knowledge in the field of power quality. Having the ability to create models and to carry out simulations helps us to evaluate specific asset issues by using our integrated approach. This is of particular advantage when it comes to renewable energies because in this kind of plants power electronic systems come usually into play (wind power, photovoltaic, HVDC). Designing and diagnosing these systems requires wellfounded expertise from a range of different disciplines.