在芬兰，BS EN 50341-2-7:2015只能使用此NNA（EN 50341- 2-7）包含芬兰的国家规范方面。本标准的要求也适用于低压（低于1 kV AC）架空线路 线结构设计的要求也适用于直流架空线路， 项目规范中给出了电气要求。本标准仅适用于新建架空线路。符合其原始日期机械和电气要求的架空线路 如果不会造成明显的危险，则可以对施工现场进行操作和维护。 线路的修理和大修可按前述要求进行。 修复是指用类似的材料替换受损部件 新的。大修意味着对生产线进行更广泛的改进，以延长其使用寿命。 这个 基本结构与以前一样。本标准适用于现有线路的所有改造工程。修改中 也可以使用早期的规范和标准。在这种情况下，尤其是 已验证动作的变化对线路负载没有显著影响。 改造工作指的是，当发生以下情况时，重新安置一些支架或延长线路 原始设计中考虑了补充，例如增加电路或 将导线更换为现有支架。交叉引用:SFS 2662SFS 5717SFS 6000SFS 6001SFS 6002EN 50110-1/2RIL 202SFS-EN 1992-1-1RIL 207SFS-EN 1997-1RIL 254取代了BS EN 50423-3:2005和BS EN 50341-3:2001，它们仍然是最新版本。购买本文件时，所有当前可用的修订版均包含在购买本文件中。

In Finland BS EN 50341-2-7:2015 can only be applied using this NNA (EN 50341- 2-7) containing National Normative Aspects for Finland.The requirements of the standard are applied also for low voltage (below 1 kV AC) overhead lines. The requirements of the structural design are applicable also for DC overhead lines, where the electrical requirements are given in the Project Specification.This standard is applicable for new overhead lines only.Overhead lines complying with the mechanical and electrical requirements of its original date of construction can be operated and maintained, if they do not cause obvious danger. The reparation and overhaul of lines can be done according to the previous requirements. Reparation means that a component which 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 same as before.This standard should be used for all modification works on existing lines. In modification works earlier norms and standards may also be used. In that case it shall especially be verified that changes in actions do not have significant impact on the loads of lines. Modification work means e.g. relocation of some supports or an extension to a line when this supplement has been taken into account in the original design, e.g. addition of a circuit or changing of the conductors to existing supports.Cross References:SFS 2662SFS 5717SFS 6000SFS 6001SFS 6002EN 50110-1/2RIL 202SFS-EN 1992-1-1RIL 207SFS-EN 1997-1RIL 254Replaces BS EN 50423-3:2005 and BS EN 50341-3:2001 which remain currentAll current amendments available at time of purchase are included with the purchase of this document.