In general terms, the scope of the consolidation of LCLs power distribution interface requirements in the ECSS-E-ST-20-20 and the relevant explanation in the present handbook is to allow a more recurrent approach for the specific designs offered by power unit manufacturers, at the benefit of the system integrators and of the Agency, thus ensuring: ·ð better quality, ·ð stability of performances, and ·ð independence of the products from specific mission targets. A recurrent approach enables power distribution manufacturing companies to concentrate on products and a small step improvement approach that is the basis of a high quality industrial output. In particular, the scope of the present handbook is: ·ð to explain the principles of operation of power distribution based on LCLs, ·ð to identify important issues related to LCLs, and ·ð to give some explanations of the requirements set up in the ECSS-E-ST-20-20 for power distribution based on LCLs, for both source and load sides.