The use of electrical energy in low-voltage networks is exposed to overvoltages from atmospheric discharges that affect equipment and people, so in an electrical system, surge protection devices SPD (Surge Protective Device) are generally installed in configuration between line and ground conductors to reduce detrimental effects. The objective of the research is to determine the optimal procedures for the installation of surge protection devices in low voltage networks to avoid deterioration in protection equipment and avoid personal accidents through the combination, location of protection devices, double voltage effect, the connection and coordination of SPD. Procedure that will allow continuous operation by means of the surge protection device that activates and discharges the current.