Lightning lead-in channels and SPD selection for Radio Base Station

This paper discusses four lightning lead-in channels of the RBS(Radio Base Station), analyzes the influence of these channels on RBS and proposes solutions; quadratic counterattack-effect is proposed according to the earth potential rise on the grounding grid caused by the lightning strike on iron tower and the lightning current's flowing to earth; this lightning model is different from lightning current distribution model in IEC lightning standard. In addition, according to the theoretical analysis and abundant experiences of China Mobile RBSs' large usage of voltage limiting type SPD(Surge Protective Devices), it is proved that the voltage limiting type SPD can protect equipment in the telecom room no matter in Guangdong(South China) which has 120 thunderstorm days or in RBSs under the severest environment.