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 third 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;
— 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.
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.
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 HD 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.

Specifies the general requirements that shall be met for the design and construction of new overhead lines to ensure that the line is suitable for its purpose with regard to safety of persons, maintenance, operation and environmental considerations.