A practical guide to lightning protection and australia and nz. Safety risk assessment sra electrical orks severity c catastrophic, cr critical, s serious, m minor, probability n negligible, f frequent, p probable, o occasional, r remote, i improbable. Safety risk assessment sra electrical orks severity c catastrophic, cr critical, s serious, m minor, probability n negligible, f frequent, p probable, o occasional, r remote, i. Lightning risk assessment alltec lightning protection. Continue reading in manual available for download below. In order to evaluate whether or not lightning protection of a structure is needed, a risk assessment in accordance with the procedures contained in iec 623052 shall be made. Today, i will explain the third method for performing the risk assessment study. For example, loss due to lighting strike is higher in hospital as compared to a store warehouse. The guide considers type of structure, type of construction, structure location, topography, occupancy, contents and lightning.
Lightning protection according to iec 62305 tecnico lisboa. Additionally it documents the use of the developed tools to conduct. As a result of lightning protection risk assessment study, risk to human life, services and cultural heritage will be obtained in figures which must be lesser than tolerable risk specified in codes and standards. Based on this analysis, measures can be taken to reduce the risks. May 17, 2019 lightning protection systems are recommended for all barns to reduce the risk of damage sustained from a lightning strike. The calculator is built following nfpa 780 standards. Earthing risk management ltd erm was established in 2002 to address the needs of the electricity supply industry to manage safety hazards associated with hv earthing systems. The objectives of this thesis are to understand the risk. Lightning protection risk assessment methodologies such as those included in iec. Riesgo software in article design calculations of lightning protection systems part twelve. Lightning protection risk assessment new lightning risk scribd. From that risk assessment, a structure may need both a structural lps and a fully coordinated set of surge protection devices spds or just overvoltage protection alone. It is determined that lightning protection is optional for your facility.
As a result of lightning protection risk assessment study, risk to human life, services and cultural heritage will be obtained in figures which must be lesser than tolerable risk specified in codes. Any decision not to provide lightning protection should only be made after considering the advice provided in this standard. Risk assessment calculator, maxwell lightning protection co. Lightning protection risk assessment new free download as pdf file. Proper consultation with the appropriate authorities or denominational bodies is essential. Lightning protection risk assessment calculator photo. Pdf development of a template for the risk assessment.
Manual fire fighting provisions are implemented but iec 623052. Design calculations of lightning protection systems part. Lightning damage to electric and electronic equipment is managed by way of strategically placed surge arrestors, suitable location of equipment and appropriate bonding and cable protection. Designers and manufacturers of lightning protection systems for buildings, factories, and homes. The decision to provide lightning protection may be taken without carrying out a risk assessment or regardless of the outcome of any risk assessment, for example, where there is a desire that there be no avoidable risk. Using the latest risk assessment software, lightning protection ireland will then carry out a series of calculations to determine the exact levels of protection required. Risk management and assessment of the building a risk analysis is performed to assess the potential risks for a structure. Home services electrical safety lightning protection risk assessment lightning protection study is highly sitespecific, with many designs unique to individual facilities and structures. Safety risk assessment sra 0007 electrical works severity c catastrophic cr critical s serious m inor probability n negligible f rfequent p probable o occasional r remote i improbable risk t olt erable l low m edium m h high n intolerable.
An engineer can use a risk assessment calculation based on nfpa 780, installation of lightning protection. Design professionals should discuss the risk assessment report with the building owner. Bs eniec 62305 lightning protection general standard. Lightning protection system design and installation. Development of a template for the risk assessment for lightning. Ecle nfpa 780 simplified lightning risk assessment. For example, a lightning strike at a power station will result a power. The program allows the user to assess risk of structures including several zones and entering lines.
Lightning risk assessment study lightning risk assessment study is actually the measure of risk of a lightning strike and probability of damages. A lightning protection system is required if it is determined that there is sufficient risk of a lightning related event causing harm and damage to a structure, the people in and around it. Jul 31, 2015 in national fire protection association nfpa 780, standard for the installation of lightning protection systems, annex l covers lightning risk assessment and takes into account the buildings environment, construction type, occupancy, contents, the consequences of a lightning strike, and other factors. This guide is designed to assist in that determination.
The aim is to select economically sound protection. The distances listed for risk assessment are based upon radial distances away from the base of the assessed tree stem at the ground surface. A toweronly system is likely to provide acceptable protection in most cases. This standard has a comprehensive risk assessment section that is based on iec. This standard has a comprehensive risk assessment section that is based on iec standards, well written rules for the design of lightning protection systems, guidance. In order to measure lightning damage risk, this article has introduced the concept of regional lightning risk assessment to make some preassessment of the extent of danger and damage. Client and consultant to decide which risks they wish to consider, provide detailed inputs to risk assessment and employ lightning protection experts to carry out risk assessment and derive need for protection and lightning protection level. Ecle nfpa 780 simplified lightning risk assessment calculator. Examples of some of the physical characteristics of a structure or facility that influence. The need for protection against the effects of lightning should be determined by carrying out a risk assessment. Nfpa 780 is the north american standard for lightning protection systems lps.
This standard has a comprehensive risk assessment section. Pdf risk analysis of lightning and surge protection devices for. Lightning protection systems and design omega red group. If calculations or special considerations recommend a lightning protection system yet the owner decides against using it, the designer should get the decision in writing. A risk assessment based on actual lightning exposure design of the air termination network and downconductors di fth tht i ti t k d thdesign of the earth termination network and earth electrodes. It contains simplified risk assessment calculations to determine if an lps is recommended for a building. Pdf this paper studies the risk data and protection measurements of lightning based on the iec62305 standard. Thompson company more than 70 years ago when protection of houses and barns constituted most of our business. The lpz zones are fundamentally derived from any structural lightning protection requirements and these are driven by the risk assessment process within bs en 62305.
The main components of a lightning protection system are air terminals, down conductors and ground rods. Frequently asked questions on lightning protection omega. Lightning protection measures as per iec 6230512010, protection measures may be adopted in order to reduce the risk according to the type of damage. Standard for the installation of lightning protection systems nfpa 780 provides lightning protection system installation requirements to safeguard people and property from fire risk and related hazards associated with lightning. Chapter 2 risk analysis to determine the requirement for a lightning protection system we will analyze the cost vs. The need for protection, the economic benefits of selecting and installing adequate protection measures should be determined in terms of risk management. Try our free lightning risk assessment calculator for your residential or commercial building. In order to evaluate whether or not lightning protection of a structure is needed, a risk assessment. Lightning protection initially as part of an nfpa task force, since disbanded assembled for the purpose of responding to the nfpa standards committee decision 0030, specifically the request for technical substantiation of the lightning protection techniques and practice contained in modern lightning protection standards. Impact of the changes in the 18th edition iet wiring. Some equipment facilities are more at risk from a lightning strike due to many factors such as the the region where the facility is located, the construction of the building and whether or not there are any existing lightning protection. It assesses the lightening risks to the facility according to international standards requirements. Whilst bs 6651 recognises a concept of zoning in annex c location categories a, b and c, the new standard defines the concept of lightning protection.
As far as section 443 is concerned, the full bs en 623052 risk assessment method must be. Jul 12, 2007 the single risk assessment of part 2 dictates whether structural andor lightning electromagnetic impulse lemp protection is required. Lightning risk assessment study is actually the measure of risk of a lightning strike and probability of damages. Some equipment facilities are more at risk from a lightning strike due to many factors such as the the region where the facility is located, the construction of the building and whether or not there are any existing lightning protection devices such as surge protectors and earthing electrodes installed. Paul, minnesota 551181792 6514557661 fax 6514552545 toll free 18007771230 email. However, the decision to provide lightning protection can be taken regardless of the outcome of risk assessment, where there is a desire that there be no avoidable risk. A simple formula is used to determine a calculated. The current standard for lightning protection in australia and new zealand is asnzs 1768. Client and consultant to decide which risks they wish to consider, provide detailed inputs to risk assessment and employ lightning protection experts to carry out risk assessment and derive need for protection and lightning protection. Mitigation of the effects of lightning strikes is attempted through the deployment of a combination of exterior and interior defences.
Initial risk assessment check the need for an lps and determine the level of protection required. However, the decision to provide a lightning protection system can be taken regardless of the outcome of risk assessment, where there is a desire that there be no avoidable risk. Paper open access lightning strike risk assessment and. Should the preliminary risk assessment indicate there to be a need for protection, it is then recommended that a copy of the asnzs as17682007 lightning protection standard be purchased, and a detailed assessment be conducted using the updated and automated spreadsheet based risk assessment calculator. A risk assessment based on actual lightning exposure design of the air termination network and downconductors di fth tht i ti t. And all of this equipment should be installed per nfpa 780. Thunderstorms involving lightning occur across the united states but are most prevalent in central and eastern states.
Erm was asked by uniper energy to carry out a lightning protection site survey and risk assessment for one of their sites. General this lightning risk assessment guide is prepared to assist in the analysis of various criteria to determine the risk of loss due to lightning. There are several special cases, not addressed by this lightning risk assessment, that may render the site more or less suspceptibale to lightning. Lightning loss risk assessment involves the evaluation of various criteria to determine the risk of loss due to lightning. Process for the management of ignition by lightning.
I am due to carry out my first fuse board change under the 18th edition, i need a risk assessment template for spd devices. The fire protection fire risk assessment criteria is based on the minimum. Lightning protection mastering the maze of bs en 62305. Protection against lightning a uk guide to the practical. Risk assessment and costs for lightning protection. Since then, erm has grown to be an established, well respected consultancy serving a diverse range of clients.
Pdf development of a template for the risk assessment for. Pdf lightning risk assessment and thunderstorm warning. As a guide, it is not possible to cover each special design element that may render a structure more or less susceptible to lightning damage. The outcome of the study will then be used as a guide to select the. A risk percentage for collateral damage to targets close to the assessed tree should be determined. Lightning risk and lightning protection reform of highway electromechanical facilities 3. Protection against lightning standard serves as the main reference for lightning risk assessment and lightning protection design and installa.
Lightning protection level lpl four protection levels i, ii, iii and iv are defined by considering the peak current, charge, specific energy, duration of various lightning strokes and the probability of these being exceeded. How to inspect lightning protection systems, examples. Product update new strikerisk software for lightning. As a result, protection was often fitted after damage had been suffered. Risk assessment in colombia involves some research works and methodologies focused in the analysis of risk levels6570and the development of warning alarm systems71 74. Electrical safety lightning protection risk assessment. Bs eniec 62305 lightning protection general standard principles.
The aesthetic appearance of the lightning protection. The simplified risk assessment table and associated graph have been compiled using the parameters and formulae listed in bs en 623052. Today, protection of commercial and industrial properties is the largest area. Thompson lightning protection systems thompson lightning protection, inc. Fire protection engineer a graduate of an accredited university or. Standard for the installation of lightning protection systems. Design guidelines for lightning protection of pv systems. Annual inspection checklist for lightning protection systems. With bs en 62305, this protection has been made an integral part of the standard and is considered within the overall risk assessment detailed in part 2.
Structural lightning protection cannot now be considered in isolation from transient. The lightning protection international standard prof. Risk assessment the need for a lightning protection system usually involves an analysis of risk and the following types of loss. Archaeological supervision of grounddisturbing work may be needed. Risk assessment for your business from lightning protection. Furthermore, it defines the relationships between damage and loss that form the basis for the risk assessment calculations in part 2 of the standard. The basis of conventional lightning protection technology. Desigr ers thought that protection was not necessary in many cases because the antenna mast was relatively short 10 meters or less. Today, i will explain the second method for performing the risk assessment study.