Mounting of by-pass disconnect switches on energized 138 kV and 230kV substation with barehand technique

摘要

After the construction of 230 kV Barra do Peixe Substation in1993, in the site of the future hydroelectric power plant (450 MW),ELETRONORTE has modified and improved its facilities to perform betterservices to its customers. This paper shows the work developed toinstall in live line two disconnect switches in 330 kV and 138 kV, usingthe barehand method, without outage to the power flow. In this way,ELCTRONORTE could continue furnishing electrical energy to severalcities in western Brazil while doing the work. Special emphasis is givento the techniques developed for this service, which was done very closeto energized busbars. The authors show the training of the crew and thesafety of all the service that was carried out. They show the studiesrealized, the sequence of activities developed along the service andphotos of the service that resulted in the successful installation ofthe disconnect switches without any outages