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4. NAD

DIN Standards Committee Steel Wire and Wire Products

Overview

This standard applies to new overhead electric lines with nominal system voltages exceeding AC 1 kV and with rated frequencies below 100 Hz. It also applies to covered conductor overhead lines and overhead insulated cable systems with nominal system voltage exceeding AC 1 kV up to and including AC 45 kV and with rated frequencies below 100 Hz. The standard specifies additional requirements and simplifications that apply only for this voltage range. Design and construction of overhead lines with insulated conductors, where internal and external clearances can be smaller than specified in the standard, are not included for lines exceeding 45 kV. Other requirements of this standard may be applicable, and where necessary, National Normative Aspects (NNAs) should be consulted. This standard is applicable for optical Ground Wires (OPGWs) and optical Conductors (OPCONs). However it is not applicable to telecommunication systems which are used on overhead transmission lines either attached to the transmission line conductor/earth wire system (for example, wraparound) or as separate cables supported by the transmission supports, for example All Dielectric Self Supporting (ADSS), or for telecommunication equipment mounted on individual transmission line structures. Requirements can also be given in the NNAs. This standard does not apply to: - overhead electric lines inside closed electrical areas as defined in EN 61936-1; - catenary systems of electrified railways, unless explicitly required by another standard. The most significant technical changes that have been made with respect to DIN EN 50341-1 (VDE 0210-1):2010-04 and DIN EN 50423-1 (VDE 0210-10):2005-05 are: - DIN EN 50341-1 (VDE 0210-1) now applies for all overhead lines with nominal voltages (exceeding 1 kV) by merging DIN EN 50341-1 (VDE 0210-1):2010-04 and DIN EN 50423-1 (VDE 0210-10):2005-05; - EN 50341-1 (VDE 0210-1) is consistent with recent editions of Eurocodes; - one unique method is described concerning the determination of actions on line; - new design methods and new developments are included. The structure of the standard is as follows: Normative references, definitions and symbols with their significations are listed in clause 2. In clause 3, the basis of design according to this standard is given. The standard specifies in clauses 4 to 6 the general requirements that shall be met for the structural and electrical design of overhead lines to ensure that the line is suitable for its purpose with due consideration given to safety of public, construction, operation, maintenance and environmental issues. Clauses 7 to 11 of this standard consider the structural and electrical requirements that shall be met for the design, installation and testing of overhead line components including supports, foundations, conductors, insulator strings and hardware as determined by the relevant design parameters of the line. Finally, clause 12 considers the quality assurance requirements during design, manufacturing and construction. The responsible committee is K 421 "Freileitungen" ("Overhead lines") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.

Document: references other documents

Responsible national committee

DKE/K 421 - Freileitungen