Energized Transmission Grounding Incident

It was reported to committee that a crew mistakenly applied personal protective grounds to an energized 69kV transmission line. According to the report the crew had tested the line de-energized with a Hastings voltage tester and applied the grounds causing the 69kV relay. No injuries were reported and the incident has been investigated and the supervisor involved. The crew claimed that the voltage tester failed to tone” that the line was energized causing them to mistakenly conclude that the line was de-energized.