2010-01-5155 - Rules on conditions and restrictions regarding the construction and use of installations and the performance of activities in the electricity network safety zone

Modification to EN 50522:2022

This document is applicable to specify the requirements for the design and erection of earthing systems of electrical installations, in systems with nominal voltage above 1 kV AC and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.
NOTE 1    The technical and procedural principles of this document can be applied when 3rd parties’ installations and facilities are planned and/or erected in the vicinity of HV electrical power installations.
For the purpose of interpreting this document, an electrical power installation is considered to be one of the following:
a)   substation, including substation for railway power supply;
b)   electrical power installations on mast, pole and tower;
switchgear and/or transformers located outside a closed electrical operating area;
c)   one (or more) power station(s) located on a single site;
the electrical power installation includes generators and transformers with all associated switchgear and all electrical auxiliary systems. Connections between generating stations located on different sites are excluded;
d)   the electrical system of a factory, industrial plant or other industrial, agricultural, commercial or public premises;
e)   electrical power installations on offshore facilities for the purpose of generation, transmission, distribution and/or storage of electricity;
f)   transition towers/poles between overhead lines and underground lines.
The electrical power installation includes, among others, the following equipment:
—   rotating electrical machines;
—   switchgear;
—   transformers and reactors;
—   converters;
—   cables;
—   wiring systems;
—   batteries;
—   capacitors;
—   earthing systems;
—   buildings and fences which are part of a closed electrical operating area;
—   associated protection, control and auxiliary systems;
—   large air core reactor.
NOTE 2   In general, a standard for an item of equipment takes precedence over this document.
This document does not apply to the design and erection of earthing systems of any of the following:
—   overhead and underground lines between separate installations;
NOTE 3   The standard, EN 50341 series Overhead lines exceeding AC 1 kV, specifies requirements for the design and erection of earthing systems in overhead lines.
—   electrified railway tracks and rolling stock;
—   mining equipment and installations;
—   fluorescent lamp installations;
—   installations on ships and off-shore installations;
—   electrostatic equipment (e.g. electrostatic precipitators, spray-painting units);
—   test sites;
—   medical equipment, e.g. medical X-ray equipment.
NOTE 4    The scope of this document does not include the requirements for carrying out live working on electrical power installations.
NOTE 5    The scope of this document considers safety requirements for HV installations and its influences on LV installations. For electrical installation up to 1 kV, the standard IEC 60364 series applies.

This part of IEC 61936 provides requirements for the design and the erection of electrical power installations in systems with nominal voltages exceeding 1 kV AC and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.
For the purpose of interpreting this document, an electrical power installation is considered to be one of the following:
a) substation, including substation for railway power supply;
b) electrical power installations on mast, pole and tower, switchgear and/or transformers located outside a closed electrical operating area;
c) one (or more) power station(s) located on a single site, the electrical power installation includes generators and transformers with all associated switchgear and all electrical auxiliary systems. Connections between generating stations located on different sites are excluded;
d) the electrical system of a factory, industrial plant or other industrial, agricultural, commercial or public premises;
e) electrical power installations on offshore facilities for the purpose of generation, transmission, distribution and/or storage of electricity;
f) transition towers/poles (between overhead lines and underground lines).
The electrical power installation includes, among others, the following equipment:
- rotating electrical machines;
- switchgear;
- transformers and reactors;
- converters;
- cables;
- wiring systems;
- batteries;
- capacitors;
- earthing systems;
- buildings and fences which are part of a closed electrical operating area;
- associated protection, control and auxiliary systems;
-  large air core reactor.
NOTE 1 In general, equipment standards take precedence over the requirements of this document.
This document does not apply to the design and erection of any of the following:
- overhead and underground lines between separate electrical power installations;
- electrified railway tracks and rolling stock;
- mining equipment and installations;
- fluorescent lamp installations;
- installations on ships according to IEC 60092 (all parts) and offshore units according to IEC 61892 (all parts), which are used in the offshore petroleum industry for drilling, processing and storage purposes;
- electrostatic equipment (e.g. electrostatic precipitators, spray-painting units);
- test sites;
- medical equipment, e.g. medical X-ray equipment.
This document does not apply to the design of prefabricated, type-tested switchgear and high voltage/low voltage prefabricated substation, for which separate IEC standards exist.
NOTE 2 The scope of this document does not include the requirements for carrying out live working on electrical power installations.
NOTE 3 The scope of this document considers safety requirements for HV installations and the influences of HV installations on LV installations. For electrical installations up to 1 kV, IEC 60364 (all parts) applies.

This European Standard applies to new overhead electric lines with nominal system voltages exceeding AC 1 kV and with rated frequencies below 100 Hz. The extent of the application of this standard by each country in respect of existing overhead lines is subject to the requirements of the National Normative Aspects (NNA) applicable to that country. The specific definition as to the meaning and extent of a “new overhead line” is to be identified by each National Committee (NC) within their own NNA. At the least, it shall mean a totally new line between two points, A and B. Field of application This European Standard 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. Additional requirements and simplifications are specified 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 the Standard may be applicable, and where necessary NNAs should be consulted. This European Standard is applicable for optical Ground Wires (OPGWs) and optical Conductors (OPCONs). However the standard 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. When such cases are necessary, requirements can be given in the NNAs. This European 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. Structure of the European Standard EN 50341-1 Normative references, definitions and symbols with their significations are listed in Clause 2 below. 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. Flowchart 1.1 summarises the structure of the European Standard EN 50341-1 and its Clauses 1 to 12.