Switching on by-pass currents during live-line maintenance operations

Technical literature about live working has been mainly devoted to problems related to electrical insulation of the network, especially distances to maintain between linesmen and live parts. This paper concentrates on aspects related to current in electrical installations as it may become necessary, during live maintenance, to separate temporarily these installations from the network. Risk analysis results on limiting conditions expressed as maximum current values and/or length of installations which can be worked on are presented