BS EN 60099-4 is the fourth part of an international multi-series standard that covers guidelines for surge arresters.
BS EN 60099-4 presents the minimum criteria for the requirements and testing of gapless metal-oxide surge arresters that are applied to AC power systems with Us above 1 kV.
BS EN 60099-4 applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit voltage surges on AC power circuits with Us above 1 kV.
BS EN 60099-4 specifies the technicalities such as related terms and definitions, identification and classification of arresters, standard ratings, service conditions, technical requirements, general testing procedures, type tests (design tests), routine tests, acceptance tests, test requirements on polymer-housed surge arresters, test requirements on gas-insulated metal-enclosed arresters (GIS-arresters), separable and dead-front arresters, liquid-immersed arresters, etc. for metal-oxide surge arresters without gaps for AC systems.
BS EN 60099-4 on metal-oxide surge arresters is useful for:
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. Metal-oxide surge arrester without gaps arrester having non-linear MO resistors connected in series and/or in parallel without any integrated series or parallel spark gaps, incorporated in housing with terminals for electrical and mechanical connection.
BS EN 60099-4 provides you with technical specifications and design aspects for metal-oxide surge arresters to ensure the manufacturing of high-quality and efficient surge arresters. It gives you the standard ratings and service conditions which are considered as a major parameter to which most users pay a lot of attention. It also enlightens the users about the identification and classification of the arresters, which helps users while selecting the type and rating of a surge arrester as per the system requirement.
BS EN 60099-4 stipulates the requirements for the metal oxide surge arresters as well as lays out the test procedures to verify the performance of the arresters as it contributes heavily to the reliability and safety of the electrical power system. This helps the users to ensure the security of the metal oxide surge arrestors and of the system, as it reduces a lot of risks that may occur due to system failure caused by lightning.
EN 60099-4:2014
IEC 60099-4:2014