BS EN IEC 60099-5:2018

What is BS EN IEC 60099-5 on Surge arresters about? 

BS EN IEC 60099-5 is an international standard that covers guidelines for surge arresters.  

BS EN IEC 60099-5 provides information, guidance, and recommendations for the selection and application of surge arresters to be used in three-phase systems with nominal voltages above 1kV.  

BS EN IEC 60099-5 applies to gapless metal-oxide surge arresters as defined in IEC 60099-4, to surge arresters containing both series and parallel gapped structures, rated 52 kV. Metal-oxide surge arresters with the external series gap for overhead transmission and distribution lines (EGLA) as defined in IEC 60099-8. It also discusses some aspects regarding the old type of SiC gapped arresters. 

BS EN IEC 60099-5 specifies terms, definitions of indoor service conditions under condensation and pollution, classification of indoor enclosed switchgear and control gear, the test procedure for classification, test facilities and associated requirements, equipment for test, etc., for classifying the indoor enclosed switchgear and control gear. 

Who is BS EN IEC 60099-5 on Surge arresters for? 

BS EN IEC 60099-5 on surge arresters is useful for: 

• Manufacturers and suppliers of surge arresters 
• Dealers and distributors of surge arresters  
• Designers of surge arresters 
• Test /service providers for surge arresters 

Why should you use BS EN IEC 60099-5 on Surge arresters? 

A surge arrester is an instrument, that is used on electric power transmission and telecommunication systems to safeguard the insulation and conductors of the system from dangerous lightning. 

BS EN IEC 60099-5 provides you with various specifications and aspects of surge arrester such as typical maximum residual voltages as its residual voltage is a major parameter to which most users pay a lot of attention. It helps while selecting the type and rating of a surge arrester as per the system requirement.  

BS EN IEC 60099-5 stipulates the requirements for surge arresters as it contributes to system reliability and design efficiency, which helps its users to select the surge arrestors with suitable characteristics and reduce a lot of extra work and time. 

What’s changed since the last update? 

BS EN IEC 60099-5:2018 supersedes BS EN 60099-5:2013, which is withdrawn. BS EN IEC 60099-5:2018 includes the following significant technical changes with respect to the previous edition: 

• Expanded discussion of comparison between the old and new classification and how to calculate or estimate the corresponding charge for different stresses 
• New annexes dealing with a comparison between line discharge classes and charge classification; estimation of arrester cumulative charges and energies during line switching