BS EN 50341-2-7 is a part of an international multi-series standard that focuses on overhead electrical lines, especially in Finland. In Finland, the standard EN 50341-1 (Part 1) can only be applied using this NNA (EN 50341-2-7) containing National Normative Aspects for Finland.
BS EN 50341-2-7 gives the requirements that are applied for low voltage (below 1 kV AC) overhead lines. The requirements of the structural design are applicable for DC overhead lines, where the electrical requirements are given in the project specification.
BS EN 50341-2-7 includes requirements for the design and construction of overhead lines equipped with covered conductors and aerial cables. Additionally, it also gives the requirements of the equipment standards.
BS EN 50341-2-7 includes requirements for the application of telecommunication cables installed on common supports with electrical lines.
BS EN 50341-2-7 stipulates the technical specifications such as the basis of design, actions on lines, electrical requirements, earthing systems, supports, foundations, conductors, earth wires, insulators, hardware, and quality assurance, checks, and taking over.
BS EN 50341-2-7 on Overhead electrical lines for FINLAND is useful for:
Reparation means that a component that has been damaged is substituted with a similar new one. Overhaul means a wider improvement of the line for extending its lifetime. The basic structure remains the same as before. The overhead lines, complying with the mechanical and electrical requirements of their original date of construction, can be operated and maintained if they do not cause any obvious danger.
BS EN 50341-2-7 gives you all the informative guidance about repairing and overhauling or existing overhead electrical lines as well as designing and constructing new overhead electrical lines equipped with conductors and other equipment used for carrying the heavy currents. It lays out detailed aspects regarding overhead electrical lines from basic designing, actions on lines, electrical requirements to civil support structure foundations, etc. This is very useful for the users to acquire all the particulars in one place for overhead electrical lines.
The users can also follow BS EN 50341-2-7 for all modification works as well on existing lines along with earlier norms and standards. The standard helps in the relocation of some supports or an extension to a line, by taking this supplement into account, in the original design.
EN 50341-2-7:2015