TC 78

Live working

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

TC 78PT 61472-2Mr Giorgio De DonàBPUB2021-012023

History

Stage
Document
Downloads
Decision Date
Target Date
PWI
2012-10-26 
prePNW
2017-09-28 
PNW
78/1200/NP PDF file 416 kB
2017-12-082017-10
PRVN
2018-03-022018-03
ACD
78/1225/RVN Word file 62 kB
PDF file 121 kB
2018-04-132018-05
CD
78/1232/CD
PDF file 199 kB
2018-08-032018-05
PCC
2018-10-262018-10
ACDV
78/1251/CC PDF file 152 kB
Word file 59 kB
2019-02-012019-02
TCDV
2019-05-062019-06
CCDV
78/1264/CDV
PDF file 339 kB
PDF file 230 kB
2019-06-282019-06
PRVC
2019-09-202019-09
AFDIS
78/1303/RVC PDF file 91 kB
Word file 65 kB
2019-12-062020-06
DECFDIS
2020-05-292020-06
RFDIS
2020-06-092020-06
CFDIS
78/1319/FDIS
2020-07-172020-09
CFDIS
78/1319(F)/FDIS
2020-07-172020-09
PRVD
2020-08-282020-08
APUB
78/1326/RVD PDF file 319 kB
2020-12-082020-09
BPUB
2020-12-092020-12
PPUB
 2021-01

Abstract

IEC 61472-2:2020 specifies a method for determining the electrical component of the minimum approach distances for live working, for AC systems 1 kV up to and including 72,5 kV. This document addresses system overvoltages and the working air distances between equipment and/or workers at different potentials.
The withstand voltage and minimum approach distances determined by the method described in this document can be used only if the following working conditions prevail:
  • workers are trained for, and skilled in, working live lines or close to live conductors or equipment;
  • the operating conditions are adjusted so that the statistical overvoltage does not exceed the value selected for the determination of the required withstand voltage;
  • transient overvoltages are the determining overvoltages;
  • tool insulation has no continuous film of moisture present on the surface;
  • no lightning is observed within 10 km of the work site;
  • allowance is made for the effect of the conducting components of tools.

Project

IEC 61472-2 ED1

Live Working – Minimum Approach Distances – Part 2: A method of determination for AC systems from 1,0 kV to 72,5 kV