The project developed a complete system (Vdip system) for fault localization, espetially earth fault localization, in medium voltage networks using distributed measuring units (DMUs) located on the secondary sides of distribution transformers. The system was designed to autonomously enable fault location while respecting the current configuration and topology of the distribution network. With this need in mind, the Vdip system is interconnected to the dispatching systems, thus ensuring fast and accurate fault localization. The Vdip system is the result of many years of development at the Brno University of Technology, which began with research into the unique Vdip method, followed by the acquisition of a national patent for this method No. 305,209 (registered in 2014) and a utility model for the Vdip system concept No. 28,054 (registered in 4/2014). In subsequent years, legal protection was extended to European patent EP2940483 (registered in 2015, accepted in 2017). The application of the results of this basic research was achieved in a pilot operation in the distribution system of EG.D lasting until 9/2020, where excellent results were achieved. The deployed Vdip system during the pilot operation demonstrates the societal benefit where it reduces the duration of the supply interruption, duration of the fault current flowing and the frequency of system switching to fault. This is thanks to the quick and accurate fault location with using the system Vdip. Further extension of the societal benefit of the Vdip system is provided by the integration of the wide area power quality monitoring functionality with the possibility of signal analysis up to 9kHz. This functionality allows comprehensive mapping of the power quality condition in the whole monitored area and thus prevents the violation of specified voltage quality parameters. The Vdip system also enables the online monitoring of distribution substations ands transmission of this information to the distribution system operator, who has sufficient information to solve adverse operating conditions, which allows reducing the duration of power outages or preventing them. A detailed description is provided on the WWW (https://www.rtu.cz/reseni/vdip-novy-zpusob-detekce-zemnich-spojeni-na-vn/) of the Vdip system supplier.