Drive system upgrade saves energy for low-voltage equipment test lab Modern drive system from frequency converters with regenerative braking helps save energy in the test laboratory Location: Bonn, Germany Challenge: To design an innovative, energy saving drive system for the energy generator, which allows as many stops and restarts per day as possible. Solution: A drive system based on an SPI inverter with SPA regenerative unit of the 9000X series replaces the previously used slip ring motor with oil-cooled resistances. Results: Thanks to the Eaton drive technology the braking energy of the excitation motor can be returned to the grid. With this new solution energy is not only saved but a significantly more flexible operation of the plant is possible, so that the longer c

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