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SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 16-04-2018
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
National forewordFOREWORD1 Scope 2 Normative references 3 Terms and definitions 4 General principles for the application of surge arresters 5 Surge arrester fundamentals and applications issues6 Insulation coordination and surge arrester applications7 Surge arresters for special applications8 Asset management of surge arrestersAnnex A (informative) - Determination of temporary overvoltages due to earth faults Annex B (informative) - Current practice Annex C (informative) - Arrester modelling techniques for studies involving insulation coordination and energy requirementsAnnex D (informative) - Diagnostic indicators of metal-oxide surge arresters in serviceAnnex E (informative) - Typical data needed from arrester manufacturers for proper selection of surge arresters Annex F (informative) - Typical maximum residual voltages for metal-oxide arresters without gaps according to IEC 60099-4 Annex G (informative) - Steepness reduction of incoming surge with additional line terminal surge capacitance Annex H (informative) - Comparison of the former energy classification system based on line discharge classes and the present classification system based on thermal energy ratings for operating duty tests and repetitive charge transfer ratings for repetitive single event energiesAnnex I (informative) - Estimation of arrester cumulative charges and energies during line switchingAnnex J (informative) - End of life and replacement of old gapped SiC-arrestersBibliography Annex ZA (normative) -Normative references to international publications with their corresponding European publications
Gives information, guidance, and recommendations for the selection and application of surge arresters to be used in three-phase systems with nominal voltages above 1 kV.
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