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BS IEC 61865:2001

Current
Current

The latest, up-to-date edition.

Overhead lines. Calculation of the electrical component of distance between live parts and obstacles. Method of calculation
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-29-2002

Publisher

British Standards Institution

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Definitions
   3.2 Symbols
4 Approach used to derive the electrical distance
5 Overvoltages
   5.1 Classification of overvoltages
   5.2 Temporary overvoltages
   5.3 Slow-front overvoltages
   5.4 Fast-front overvoltages
6 Required withstand voltage of the air gap
   6.1 General
   6.2 Calculation of the required withstand voltage
7 Calculation of the distance associated with the
   overvoltages
Annex A (informative) Relationship between U(50)
        and the gap length, d
Annex B (informative) Example of the calculation of
        the electrical component
Bibliography

Gives guidance for the calculation of electrical distances between live and earthed parts required to prevent air-gap breakdown which may endanger members of the public who legitimately come close to live parts. Applicable only to overhead lines designed to operate at more than 45 kV phase-to-phase a.c. It manages the electrical component of distances between conductors and movable objects - vehicles on the ground, vessels on water, persons on top of objects or on the ground, wildlife on the ground (but not airborne), etc.

Committee
PEL/11
DevelopmentNote
Supersedes 91/34059 DC (04/2002)
DocumentType
Standard
Pages
26
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
IEC 61865:2001 Identical

IEC 61472:2013 Live working - Minimum approach distances for a.c. systems in the voltage range 72,5 kV to 800 kV - A method of calculation
IEC 60050-601:1985 International Electrotechnical Vocabulary (IEV) - Part 601: Generation, transmission and distribution of electricity - General
IEC 60071-2:1996 Insulation co-ordination - Part 2: Application guide
IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
IEC 60071-1:2006+AMD1:2010 CSV Insulation co-ordination - Part 1: Definitions, principles and rules

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Hardcopy - English
PDF - English
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