ITU-T Recommendations

Recommendation ITU-T K.105 provides lightning protection procedures for protecting dedicated photovoltaic (PV) power supply systems used to provide electric power to radio base stations (RBSs). This Recommendation describes the bonding and earthing procedures applied to the metallic supports of the PV array, considering the following scenarios for the installation of the PV array: ground surfaces, rooftops and towers. For each scenario, the possibility of installing the electronic controller close to the PV array or close to the DC load is considered. This Recommendation also provides the configuration and rating of protection modules required to protect the electronic controller and the PV array against lightning surges.