Rewinding and Overhaul

rewinding and overhaul

Rewinding and Overhaul of Generators

Advanced servicing and overhaul of hydropower generators done in the field at our customer´s power stations as well as at our well equipped service workshop

We overhaul, repair, or exchange, for example, various types of windings, rolling element or sleeve bearings, cores, or coolers. Alternatively we alter generators, for example, from horizontal to a vertical arrangement. Diagnosis of windings is done with high sensitivity insulation meters, tan delta, or PD (partial discharge) measurements. Checking of cores is done e.g. by establishing values from Epstein tests and thermal photography. Sleeve bearings are measured and checked ultrasonically. We work with all types of windings, both high and low voltage. When rewinding generators to a different voltage, we make detailed calculations to optimize the machine characteristics.