EMC Practices focused in the mitigation of Lightning Electromagnetic Pulse (LEMP): Earthing and bonding approach of the IEC 62305

Abstract

This paper presents the results obtained during the parameter identification of electromagnetic compatibility in lightning protection systems. It sets out a number of good engineering practices, aimed at mitigation of disturbances, transient type, created by an electromagnetic pulse, generated during the grounding of lightning. These disturbances are often reflected as overvoltage and / or overcurrent radiated and conducted or also called surges, the latter a strong impact on the operation of end use electrical installations by bringing significant cost stops the processes associated with the installation and equipment within the same. The recommendations raised here focus on the issues related to grounding systems described in the standard (IEC 62305-4, 2010), which describes the equipotential network (bonding network) and system ground terminals (earth-terminal system) as basic components of the system grounding (earthing). These practices or recommendations are aimed at start-up, during the design stage of the system, thereby linking the specialties of architecture, civil engineering and electrical engineering, as most should be implemented during the next stage of design, as is the construction of the installation. Finally, this paper describes the basic configurations of equipotential network reviewing the main features, advantages and main components, in turn addresses key system configurations ground terminals and its advantages over electromagnetic interference mitigation.