BS EN 62305-2:2006 - Page 4

BS EN 62305-2:2006 Protection against lightning. Risk management

BS EN 62305-2 outlines risk assessment for a structure or service from lightning flashes to earth.

Its purpose is to provide a procedure for the evaluation of such a risk. Once an upper tolerable limit for the risk has been selected, this procedure allows the selection of appropriate protection measures to be adopted to reduce the risk to or below the tolerable limit.

Contents of BS EN 62305-2:

• Introduction
• Scope
• Normative references
• Terms, definitions, symbols and abbreviations
• Explanation of terms
• Damage and loss
• Risk and risk components
• Composition of risk components related to a structure
• Composition of risk components related to a service
• Factors influencing the risk components
• Risk management
• Basic procedure
• Structure to be considered for risk assessment
• Service to be considered for risk assessment
• Tolerable risk RT
• Specific procedure to evaluate the need of protection
• Procedure to evaluate the cost effectiveness of protection
• Protection measures
• Selection of protection measures
• Assessment of risk components for a structure
• Basic equation
• Assessment of risk components due to flashes to the structure (S1)
• Assessment of the risk component due to flashes near the structure (S2)
• Assessment of risk components due to flashes to a line connected to the structure (S3)
• Assessment of risk component due to flashes near a line connected to the structure (S4)
• Summary of risk components in a structure
• Partitioning of a structure in zones ZS
• Assessment of risk components in a structure with zones ZS
• Assessment of risk components for a service
• Basic equation
• Assessment of components due to flashes to the service (S3)
• Assessment of risk component due to flashes near the service (S4
• Assessment of risk components due to flashes to structures to which the service is connected (S1)
• Summary of risk components for a service
• Partitioning of a service into sections SS