Ground floor power generator working system measured in megawatts (MW) or kilowatts and helps utilities project just how big of an electricity load a generator can handle. he constraints to ensure the safe operation of the power grid are satisfied – such as requirements for voltage drop, line heat capacity, etc. – power supply and lines are chosen by changing the opening and closing states of each segment switch and interconnection switches for more details of Public electric distribution working system download this AutoCAD file, cad drawing , dwg format