BS IEC 61865:2001
Current
The latest, up-to-date edition.
Overhead lines. Calculation of the electrical component of distance between live parts and obstacles. Method of calculation
Hardcopy , PDF
English
29-03-2002
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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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