IEC 60071-2:2018 RLV
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Insulation co-ordination - Part 2: Application guidelines
24-05-2023
16-03-2018
FOREWORD
1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and symbols
4 Representative voltage stresses in service
5 Co-ordination withstand voltage
6 Required withstand voltage
7 Standard withstand voltage and testing procedures
8 Special considerations for overhead lines
9 Special considerations for substations
Annex A (informative) - Determination of temporary
overvoltages due to earth faults
Annex B (informative) - Weibull probability distributions
Annex C (informative) - Determination of the representative
slow-front overvoltage due to line energization and
re-energization
Annex D (informative) - Transferred overvoltages in
transformers
Annex E (informative) - Lightning overvoltages
Annex F (informative) - Calculation of air gap breakdown
strength from experimental data
Annex G (informative) - Examples of insulation co-ordination
procedure
Annex H (informative) - Atmospheric correction - Altitude
correction
Annex I (informative) - Evaluation method of non-standard
lightning overvoltage shape for representative
voltages and overvoltages
Annex J (informative) - Insulation co-ordination for
very-fast-front overvoltages in UHV substations
Bibliography
IEC 60071-2:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 60071-2:2018 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems. It gives guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071-1 and to justify the association of these rated values with the standardized highest voltages for equipment. It covers three-phase systems with nominal voltages above 1 kV. This edition includes the following significant technical changes with respect to the previous edition:
a) the annex on clearance in air to assure a specified impulse withstand voltage installation is deleted because the annex in IEC 60071-1 is overlapped;
b) 4.2 and 4.3 on surge arresters are updated;
c) 4.3.5 on very-fast-front overvoltages is revised. Annex J on insulation co-ordination for very-fast-front overvoltages in UHV substations is added;
d) Annex H on atmospheric correction – altitude correction is added.
e) Annex I on evaluation method of non-standard lightning overvoltage shape is added.
It has the status of a horizontal standard in accordance with IEC Guide 108.
| Committee |
TC 99
|
| DevelopmentNote |
Also available in CD-ROM format. Stability Date: 2021. (03/2018)
|
| DocumentType |
Redline
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| IEC 62271-100:2008+AMD1:2012+AMD2:2017 CSV | High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers |
| IEC 60099-4:2014 | Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems |
| IEC TR 60071-4:2004 | Insulation co-ordination - Part 4: Computational guide to insulation co-ordination and modelling of electrical networks |
| ISO 2533:1975 | Standard Atmosphere |
| IEC 60099-6:2002 | Surge arresters - Part 6: Surge arresters containing both series and parallel gapped structures - Rated 52 kV and less |
| IEC 60505:2011 | Evaluation and qualification of electrical insulation systems |
| IEC 60099-5:2013 | Surge arresters - Part 5: Selection and application recommendations |
| IEC 62271-1:2017 | High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear |
| IEC 60099-8:2017 | Surge arresters - Part 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV |
| IEC 60060-1:2010 | High-voltage test techniques - Part 1: General definitions and test requirements |
| IEC 60507:2013 | Artificial pollution tests on high-voltage ceramic and glass insulators to be used on a.c. systems |
| IEC 60071-1:2006+AMD1:2010 CSV | Insulation co-ordination - Part 1: Definitions, principles and rules |
| IEC TS 60815-1:2008 | Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 1: Definitions, information and general principles |
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