DANSK DS/IEC 61865 PDF

This Standard provides guidance for the calculation of electrical distances between live and earthed parts required to prevent air-gap breakdown which may endanger members of the public who legitimately come close to live parts. It is applicable only to overhead lines designed to operate at more than 45 kV phase-to-phase a.c. It deals with the electrical component of distances between conductors and movable objects - vehicles on the ground, vessels on water, persons on top of objects or on the ground, wildlife on the ground (but not airborne), etc. This standard does not deal with the following public and worker safety aspects: ---- This standard does not give the electrical distance requirements for the design of overhead line structures. Neither does it give the distance requirements for overhead line structures which need to be accessible to workers while the line is energized (for example, distances to line workers or painters). Distances between conductors and the structure of the tower are normally chosen to meet the required operating reliability of the line. It is possible that this distance may not always be adequate to allow live working or, in some cases, access for workers to parts of the structure near to live conductors.