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IEC 61472:2013
Current
The latest, up-to-date edition.
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Live working - Minimum approach distances for a.c. systems in the voltage range 72,5 kV to 800 kV - A method of calculation
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
11-04-2013
FOREWORD
1 Scope
2 Terms, definitions and symbols
3 Methodology
4 Factors influencing calculations
5 Evaluation of risks
6 Calculation of minimum approach distance D[A]
Annex A (informative) - Ergonomic distance
Annex B (informative) - Overvoltages
Annex C (informative) - Dielectric strength of air
Annex D (informative) - Gap factor k[g]
Annex E (informative) - Allowing for atmospheric
conditions
Annex F (informative) - Influence of floating conductive
objects on the dielectric strength
Annex G (informative) - Live working near contaminated,
damaged or moist insulation
Bibliography
IEC 61472:2013 describes a method for calculating the minimum approach distances for live working, at maximum voltages between 72,5 kV and 800 kV. This standard addresses system overvoltages and the working air distances or tool insulation between parts and/or workers at different electric potentials. The required withstand voltage and minimum approach distances calculated by the method described in this standard are evaluated taking into consideration
- if the workers are trained for, and skilled in, working in the live working zone;
- if the anticipated overvoltages do not exceed the value selected for the determination of the required minimum approach distance;
- if transient overvoltages are the determining overvoltages;
- if tool insulation has no continuous film of moisture or measurable contamination present on the surface;
- if no lightning is seen or heard within 10 km of the work site;
- if allowance is made for the effect of conducting components of tools; and
- if the effect of altitude, insulators in the gap, etc, on the electric strength is taken into consideration. For conditions other than the above, the evaluation of the minimum approach distances may require specific data, derived by other calculation or obtained from additional laboratory investigations on the actual situation. This third edition cancels and replaces the second edition of IEC 61472 published in 2004. It constitutes a technical revision. Significant changes with regard to the second edition are:
- the clarification of the scope;
- the review of the definitions;
- the clarification of the methodology of determining whether live working is permissible and the calculation of the minimum approach distances;
- the modification of the basic equation for calculation of the minimum approach distance; and
- the introduction of Table 1 for altitude correction factor simplification ka. The contents of the corrigendum of October 2015 have been included in this copy.
Committee |
TC 78
|
DevelopmentNote |
Stability Date: 2017. (04/2013)
|
DocumentType |
Standard
|
Pages |
90
|
PublisherName |
International Electrotechnical Committee
|
Status |
Current
|
Supersedes |
Standards | Relationship |
NF EN 61472 : 2013 | Identical |
NEN EN IEC 61472 : 2013 | Identical |
PN EN 61472 : 2013 AC 2016 | Identical |
DIN EN 61472 : 2014 | Identical |
VDE 0682-100 : 2014 | Identical |
BS EN 61472:2013 | Identical |
UNE-EN 61472:2014 | Identical |
CEI EN 61472 : 2014 | Identical |
EN 61472:2013/AC:2015 | Identical |
ULC 61472:1ED 2014-05-01 | Identical |
NBN EN 61472 : 2013 COR 2015 | Identical |
CEI EN 62193 : 2005 | LIVE WORKING - TELESCOPIC STICKS AND TELESCOPIC MEASURING STICKS |
BS EN 60903:2003 | Live working. Gloves of insulating material |
I.S. EN 50110-1:2013 | OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS |
BS EN 50341-1:2012 | Overhead electrical lines exceeding AC 1 kV General requirements. Common specifications |
IEC 61230:2008 | Live working - Portable equipment for earthing or earthing and short-circuiting |
EN 61479:2001/A1:2002 | LIVE WORKING - FLEXIBLE CONDUCTOR COVERS (LINE HOSES) OF INSULATING MATERIAL |
EN 61230:2008 | LIVE WORKING - PORTABLE EQUIPMENT FOR EARTHING OR EARTHING AND SHORT-CIRCUITING |
BS IEC 61865:2001 | Overhead lines. Calculation of the electrical component of distance between live parts and obstacles. Method of calculation |
BS EN 61479:2001 | Live working. Flexible conductor covers (line hoses) of insulating material |
BS EN 62193:2003 | Live working. Telescopic sticks and telescopic measuring sticks |
EN 50341-1:2012 | Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications |
I.S. EN 62193:2003 | LIVE WORKING - TELESCOPIC STICKS AND TELESCOPIC MEASURING STICKS |
CEI EN 50110-1 : 2014 | OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS |
BS EN 50110-1:2013 | Operation of electrical installations General requirements |
99/201503 DC : 0 | IEC 61479 ED.1 - LIVE WORKING - CONDUCTOR COVERS (LINE HOSES) OR INSULATING MATERIAL FOR ELECTRICAL PURPOSES |
EN 61057:2017 | Live working - Insulating aerial devices for mounting on a chassis |
I.S. EN 61057:2017 | LIVE WORKING - INSULATING AERIAL DEVICES FOR MOUNTING ON A CHASSIS |
I.S. EN 61230:2008 | LIVE WORKING - PORTABLE EQUIPMENT FOR EARTHING OR EARTHING AND SHORT-CIRCUITING |
I.S. EN 50341-1:2012 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
CEI EN 50341-1 : 2013 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
I.S. EN 61479:2001 | LIVE WORKING - FLEXIBLE CONDUCTOR COVERS (LINE HOSES) OF INSULATING MATERIAL |
12/30260570 DC : 0 | BS EN 50341-1 - OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
BS EN 60832-1:2010 | Live working. Insulating sticks and attachable devices Insulating sticks |
BS EN 61057:1994 | Aerial devices with insulating boom used for live working exceeding 1 kV a.c. |
UNE-EN 50110-1:2014 | Operation of electrical installations - Part 1: General requirements |
I.S. EN 60903:2003 | LIVE WORKING - GLOVES OF INSULATING MATERIAL |
IEC 61057:2017 | Live working - Insulating aerial devices for mounting on a chassis |
IEC 61479:2001+AMD1:2002 CSV | Live working - Flexible conductor covers (line hoses) of insulating material |
IEC 60832-1:2010 | Live working - Insulating sticks and attachable devices - Part 1: Insulating sticks |
IEC 62193:2003 | Live working - Telescopic sticks and telescopic measuring sticks |
PREN 50341-1 : DRAFT 2012 | OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS |
CEI EN 60832-1 : 2011 | LIVE WORKING - INSULATING STICKS AND ATTACHABLE DEVICES - PART 1: INSULATING STICKS |
BS EN 61230:2008 | Live working. Portable equipment for earthing or earthing and short-circuiting |
IEC 61865:2001 | Overhead lines - Calculation of the electrical component of distance between live parts and obstacles - Method of calculation |
I.S. EN 60832-1:2010 | LIVE WORKING - INSULATING STICKS AND ATTACHABLE DEVICES - PART 1: INSULATING STICKS |
UNE-EN 61230:2011 | Live working - Portable equipment for earthing or earthing and short-circuiting |
UNE-EN 60832-1:2011 | Live working - Insulating sticks and attachable devices -- Part 1: Insulating sticks |
EN 60832-1:2010 | Live working - Insulating sticks and attachable devices - Part 1: Insulating sticks |
EN 50110-1:2013 | Operation of electrical installations - Part 1: General requirements |
EN 60903 : 2003 COR 2005 | LIVE WORKING - GLOVES OF INSULATING MATERIAL |
EN 62193:2003 | Live working - Telescopic sticks and telescopic measuring sticks |
IEC 61477:2009 | Live working - Minimum requirements for the utilization of tools, devices and equipment |
IEC 60743:2013 | Live working - Terminology for tools, devices and equipment |
IEC 60071-2:1996 | Insulation co-ordination - Part 2: Application guide |
IEC 60050-651:2014 | International Electrotechnical Vocabulary (IEV) - Part 651: Live working |
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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