I.S. EN 50522:2022
Current
The latest, up-to-date edition.
Earthing of power installations exceeding 1 kV a.c.
Hardcopy , PDF
English
21-03-2022
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Fundamental requirements
5 Design of earthing systems
6 Measures to avoid transferred potential
7 Construction of earthing systems
8 Measurements
9 Maintainability
10 Inspection and documentation of earthing systems
Annex A (normative) Methods of calculating permissible touch voltages
Annex B (normative) Calculation of Permissible touch voltage UTp, Prospective permissible touch voltage UvTp
Annex C (normative) Type and minimum dimensions of earth electrode materials ensuring mechanical strength and corrosion resistance
Annex D (normative) Current rating calculation of earthing conductors and earth electrodes
Annex E (normative) Description of the recognized specified measures M
Annex F (normative) Measures on earthing systems to reduce the effects of high frequency interference
Annex G (normative) Detailed measures for earthing of equipment and installations
Annex H (normative) Measuring touch voltages
Annex I (informative) Reduction factors related to earth wires of overhead lines and metal sheaths of underground cables
Annex J (informative) Basis for the design of earthing systems
Annex K (informative) Installing the earth electrodes and earthing conductors
Annex L (informative) Measurements for and on earthing systems
Annex M (informative) The use of reinforcing bars in concrete for earthing purpose
Annex N (informative) Global Earthing System
Annex O (normative) Special national conditions
Annex P (informative) A-deviations
Bibliography
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