IEC 61472-2013 cor1-2015 PDF

Full title and description

Corrigendum 1 to 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". This corrigendum (2015) contains editorial and technical corrections to the 3rd edition (2013) of IEC 61472 and is published in English and French as a short corrigendum document.

Abstract

IEC 61472:2013/COR1:2015 amends and clarifies points in the 2013 edition of IEC 61472 that affect the method used to calculate minimum approach distances (MAD) for live working on alternating‑current systems with nominal system voltages in the range 72.5 kV to 800 kV. The corrigendum refines calculation details and editorial items to ensure consistent application of the standard.

General information

• Status: Current corrigendum to IEC 61472:2013 (in force as the formal Corrigendum 1, 2015).
• Publication date: 29 October 2015 (Corrigendum 1 to the 2013 edition).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 13.260; 29.240.20; 29.260.99.
• Edition / version: Edition 3.0 (IEC 61472:2013) with Corrigendum 1 published 2015 (document ref IEC 61472:2013/COR1:2015).
• Number of pages: Corrigendum published as a very short one‑page corrigendum (document of 1 page / small file).

Scope

Specifies corrections to the method for calculating minimum approach distances for live working on a.c. systems with highest system voltages from 72.5 kV up to 800 kV. The standard (as amended) addresses factors influencing the electrical withstand voltage and the resulting air distances (MAD) between live parts and personnel or tools, taking into account transient overvoltages, altitude corrections and effects of tool conductive components under defined working conditions.

Key topics and requirements

• Method of calculation for the electrical component of the minimum approach distance (MAD) for a.c. systems 72.5 kV–800 kV.
• Consideration of transient and statistical overvoltages in selecting withstand voltages used for MAD.
• Altitude correction factor (ka) and simplified application via tables introduced/clarified in the 2013 edition and maintained by the corrigendum.
• Assumptions and working conditions required for application (trained personnel, no continuous moisture film on tool insulation, no lightning within ~10 km, allowance for conducting tool components).
• Editorial and technical corrections affecting formulas, table values or explanatory text (issued as Corrigendum 1, 2015).

Typical use and users

Used by transmission and distribution utilities, live‑line working teams, safety and compliance engineers, standards committees and regulators to determine safe minimum approach distances and to develop procedures, training and work rules for live working on high‑voltage a.c. systems (72.5–800 kV). It is also used by designers and consultants assessing live working risk and by organizations preparing national adoptions or national guidance.

Related standards

Primary related documents include the base IEC 61472:2013 (3rd edition) and earlier IEC 61472 editions (1998, 2004) and their corrigenda; Part 2 of the series (IEC 61472‑2:2021) covers the electrical component method for AC systems from 1.0 kV up to and including 72.5 kV and is the complementary document for lower voltage ranges. Other TC 78 live‑working publications and national adoptions (EN/BS/NS equivalents) are commonly referenced when applying MAD in practice.

Keywords

live working; minimum approach distance; MAD; high voltage; a.c. systems; overvoltages; altitude correction; electrical safety; TC 78; corrigendum.

FAQ

Q: What is this standard?

A: It is Corrigendum 1 (2015) to IEC 61472:2013 — a short correction document updating the 2013 edition of the IEC standard that specifies how to calculate minimum approach distances for live working on a.c. systems from 72.5 kV to 800 kV.

Q: What does it cover?

A: It corrects and clarifies calculation details, editorial items and application assumptions in the 2013 edition so that the prescribed method for determining the electrical component of MAD for the 72.5–800 kV range is applied consistently. The full 2013 edition contains the method, assumptions (no lightning within 10 km, tool insulation conditions, trained workers, etc.), altitude corrections and related tables; the corrigendum adjusts specific points in that text.

Q: Who typically uses it?

A: Utilities, live‑line technicians and supervisors, safety engineers, consultants, equipment designers and national standards bodies adopt and use the standard to set safe working distances, training requirements and live‑working procedures.

Q: Is it current or superseded?

A: The document is a corrigendum (2015) to the 2013 edition; it does not supersede the 2013 edition but amends it. The 2013 edition (with its corrigenda) is the current IEC publication for the 72.5–800 kV method (stability date shown for the 2013 edition is 2028 on the IEC catalogue entry). Users should apply the base 2013 edition together with Corrigendum 1 (2015).

Q: Is it part of a series?

A: Yes — IEC 61472 is published in parts addressing different voltage ranges: the 2013 edition (with Corrigendum 1) covers 72.5 kV to 800 kV; IEC 61472‑2:2021 provides the method for 1.0 kV to 72.5 kV. The series is produced by IEC/TC 78 (Live working).

Q: What are the key keywords?

A: Live working, minimum approach distance (MAD), high voltage, a.c. systems 72.5–800 kV, overvoltages, altitude correction, tool insulation, IEC 61472, Corrigendum 1 (2015).