Insulation co-ordination - Part 2: Application guidelines

Published date

04-05-2018

Publisher

European Committee for Standards - Electrical

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 D (informative) - Transferred overvoltages in transformers
Annex E (informative) - Lightning overvoltages
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
Annex ZA (normative) Normative references to
         international publications with their corresponding
         European publications

NEW!IEC 60071-2:2018 is available as IEC 60071-2:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the 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. It has the status of a horizontal standard in accordance with IEC Guide 108. 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.

DevelopmentNote	Supersedes & Redesignates EN 60071-2. (05/2018)
DocumentType	Standard
PublisherName	European Committee for Standards - Electrical
Status	Current
Supersedes	EN 60071-2:1997

Standards	Relationship
DIN EN IEC 60071-2:2021-07	Identical
CEI EN IEC 60071-2:2018	Identical
OVE EN IEC 60071-2:2021 08 01	Identical
VDE 0111-2:2021-07	Identical
UNE-EN IEC 60071-2:2018	Identical
IEC 60071-2:1996	Identical
BS EN IEC 60071-2:2018	Identical

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
EN 60060-1:2010	High-voltage test techniques - Part 1: General definitions and test requirements
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
EN 60071-1:2006/A1:2010	INSULATION CO-ORDINATION - PART 1: DEFINITIONS, PRINCIPLES AND RULES
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
EN 60505:2011/AC:2017-03	EVALUATION AND QUALIFICATION OF ELECTRICAL INSULATION SYSTEMS (IEC 60505:2011/COR1:2017)
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