This study presents a measurement concept that is designed to provide or validate input parameters for network planning guidelines in the distribution grid, mainly low-voltage (LV) level. Therefore, the authors conceived a hardware setup to measure completely the LV distribution of a transformer station and partly within the subordinated grid. It consists of three types of measurement devices, namely power quality analysers, four-phase power meters, and smart domestic supply meters. A substantial part of the concept is an integrated data architecture that also collects existing company data about the physical distribution network and its customers. This will be used for a statistical analysis of effective usage of the network equipment. A comprehensive set of questions have been identified. The hardware rollout and software integration are in progress. First results and experiences are shown on a qualitative basis.