Number and localisation of MV/LV transformer substations

The main criteria to consider for determination of the number and the location of the MV/LV substations are the following:

• Number of buildings
• Surface of each building
• Number of floors per building
• Repartition and power of the consumers
• Power demand per area, floor, building
• Sensitivity to interruption, need for redundancy

To determine the number and the location of the MV/LV substations, we may however give the following basic indications:

• Small and medium size building: One single MV/LV substation
• Large building: One or several MV/LV substations depending on the power and the repartition of the consumers
• Building with several floors: One or several MV/LV substations depending on the power and the repartition of the consumers. One MV/LV substation may be dedicated to each floor
• Large site with several buildings: One MV/LV substation may be dedicated to each building.