Primary distribution voltage power supply of measurement cabin including The primary distribution system is that part of the electric distribution system between the distribution substation and distribution transformers. It is made up of circuits called primary feeders or distribution feeders. Primary Voltage means the level of voltage at facilities at which electric power is taken or delivered, generally at a level between 12 kV and 33 kV, but always between 2 kV and 50 kV. Primary Voltage means any voltage between 750 volts and 50,000 volts. also that show details of measurement cabin for more details of Primary distribution voltage power supply of measurement cabin download AutoCAD file, cad drawing or dwg format.