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Performance Evaluation of a Coordinated Surge Protective Devices System

The installation of surge protective devices (SPD) can provide the required protection against lightning surges for equipment within a structure. To this end, the main parameter to be considered is the probability PSPD that the SPD reduces the frequency of damage of the equipment. This paper shows how the probability PSPD can be evaluated and how to select SPD in order to get the required value of PSPD for achieving equipment protection. Finally, an SPD selection example is described and presented.