|Document ID (ISN)||105127|
|ISSN - Serial title
||1545-9624 - Journal of Occupational and Environmental Hygiene
|Convention or series no.
||Bracken T., Senior R., Dudman J.
||60-Hertz electric-field exposures in transmission line towers
||Sep. 2005, Vol.2, No.9, p.444-455. Illus. 8 ref.
||This study investigated 60-Hz electric field exposures among line workers in 230 to 765-kV transmission line towers. The exposures were based on computations of the unperturbed electric field along climbing routes and at work positions on the towers and on insulated ladders suspended in towers. Computed exposures are generally expressed in terms of the unperturbed electric field averaged over the body surface as stipulated by guidelines. However for realistic on-tower positions, the worker's posture, the uniformity of the field, and the field orientation differ from the guideline exposure scenario of standing erect in a vertical uniform field. The average electric-field exposure during climbing ranged from 10kV/m for a 230-kV tower to 31kV/m for a 765-kV tower, occasionally exceeding the 20kV/m limit given in the recently adopted IEEE Standard C95.6 2002.
||electric fields; exposure evaluation; overhead electric lines; electric power distribution
||USA; work on electrical equipment; limitation of exposure; work posture
||D - Periodical articles
|Country / State or Province||USA|
|Broad subject area(s)