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Low-voltage switchgear and controlgear assemblies - Part 1: General rules (IEC 61439-1:2020/COR1:2021)
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 07-02-2022
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.
FOREWORD INTRODUCTION 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols and abbreviations 5 Interface characteristics6 Information 7 Service conditions8 Constructional requirements 9 Performance requirements10 Design verification11 Routine verificationAnnex A (normative) Minimum and maximum cross-section of copper cables suitable for connection to terminals for external cables (see 88) Annex B (normative) Method of calculating the cross-sectional area of protectiveconductors with regard to thermal stresses due to currents of short duration Annex C (informative) User information templateAnnex D (informative) Design verification Annex E (informative) Rated diversity factorAnnex F (normative) Measurement of clearances and creepage distances Annex G (normative) Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of the equipment Annex H (informative) Operating current and power loss of copper cables Annex I (informative) Thermal equivalent of an intermittent current Annex J (normative) Electromagnetic compatibility (EMC)Annex K (normative) Operating current and power loss of bare copper bars Annex L (informative) Guidance on verification of temperature-rise Annex M (normative) Verification of the short-circuit withstand strength of busbar structures by comparison with a reference design by calculationAnnex N (informative) List of notes concerning certain countries Bibliography
This part of IEC 61439 lays down the general definitions and service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and controlgear assemblies.
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