• EN 50522:2010

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Earthing of power installations exceeding 1 kV a.c.

    Available format(s): 

    Superseded date:  14-03-2022

    Language(s): 

    Published date:  05-11-2010

    Publisher:  European Committee for Standards - Electrical

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    Table of Contents - (Show below) - (Hide below)

    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
    Annex A (normative) - Method of calculating permissible touch
            voltages
    Annex B (normative) - Touch voltage and body current
    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 (normative) - Details on site inspection and documentation
            of earthing systems
    Annex N (informative) - The use of reinforcing bars in concrete
            for earthing purpose
    Annex O (informative) - Global Earthing System
    Annex P (normative) - Special national conditions
    Annex Q (informative) - A-deviations

    Abstract - (Show below) - (Hide below)

    This European Standard 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 a.c. 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 standard, an electrical power installation is considered to be one of the following: a)substation, including substation for railway power supply; b)electrical 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 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. 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. NOTEIn general, a standard for an item of equipment takes precedence over this standard. This European Standard does not apply to the design and erection of earthing systems of any of the following: –overhead and underground lines between separate installations; –electric railways; –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. This European Standard does not apply to the requirements for carrying out live working on electrical installations.

    General Product Information - (Show below) - (Hide below)

    Committee CLC/TC 99X
    Development Note Together with EN 61936-1 supersedes HD 637. (12/2010)
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    UNE-EN 50341-1:2017 Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications
    14/30247711 DC : 0 BS EN 50633 - RAILWAY APPLICATIONS - FIXED INSTALLATIONS - PROTECTION PRINCIPLES FOR AC AND DC ELECTRIC TRACTION SYSTEMS
    I.S. EN 50110-1:2013 OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS
    BS EN 50341-1:2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    EN 50216-4:2015 Power transformer and reactor fittings - Part 4: Basic accessories (earthing terminal, drain and filling devices, thermometer pocket, wheel assembly)
    EN 50341-2-19:2015 Overhead electrical lines exceeding AC 1 kV - Part 2-19: National Normative Aspects (NNA) for CZECH REPUBLIC (based on EN 50341-1:2012)
    UNE-EN 50633:2017 Railway applications - Fixed installations - Protection principles for AC and DC electric traction systems
    EN 50341-2-20:2015 Overhead electrical lines exceeding AC 1 kV - Part 2-20: National Normative Aspects (NNA) for ESTONIA (based on EN 50341-1:2012)
    EN 50341-1:2012 Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications
    ISO 19859:2016 Gas turbine applications Requirements for power generation
    KTA 3403 : 2015(R2017) CABLE PENETRATIONS THROUGH THE REACTOR CONTAINMENT VESSEL OF NUCLEAR POWER PLANTS
    CEI EN 50110-1 : 2014 OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS
    BS EN 50110-1:2013 Operation of electrical installations General requirements
    BS EN 50341-2-20:2015 OVERHEAD ELECTRICAL LINES EXCEEDING AC 45 KV - PART 2-20: NATIONAL NORMATIVE ASPECTS (NNA) FOR ESTONIA (BASED ON EN 50341-1:2012)
    BS EN 50633:2016 Railway applications. Fixed installations. Protection principles for AC and DC electric traction systems
    I.S. EN 50216-4:2015 POWER TRANSFORMER AND REACTOR FITTINGS - PART 4: BASIC ACCESSORIES (EARTHING TERMINAL, DRAIN AND FILLING DEVICES, THERMOMETER POCKET, WHEEL ASSEMBLY)
    CEI EN 50341-2-23 : 1ED 2017 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 2-23: NATIONAL NORMATIVE ASPECTS (NNA) FOR SLOVAKIA (BASED ON EN 50341-1:2012)
    CEI EN 50341-1 : 2013 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    BS EN 50341-2-19:2015 Overhead electrical lines exceeding AC 1 kV National Normative Aspects (NNA) for CZECH REPUBLIC (based on EN 50341-1:2012)
    I.S. EN 50341-2-20:2015 OVERHEAD ELECTRICAL LINES EXCEEDING AC 45 KV - PART 2-20: NATIONAL NORMATIVE ASPECTS (NNA) FOR ESTONIA (BASED ON EN 50341-1:2012)
    EN 50341-2-23:2016 Overhead electrical lines exceeding AC 1 kV – Part 2-23: National Normative Aspects (NNA) for SLOVAKIA (based on EN 50341-1:2012)
    12/30260570 DC : 0 BS EN 50341-1 - OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    UNE-EN 50110-1:2014 Operation of electrical installations - Part 1: General requirements
    I.S. EN 50341-2-19:2015 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 2-19: NATIONAL NORMATIVE ASPECTS (NNA) FOR CZECH REPUBLIC (BASED ON EN 50341-1:2012)
    I.S. EN 50341-2-23:2016 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 2-23: NATIONAL NORMATIVE ASPECTS (NNA) FOR SLOVAKIA (BASED ON EN 50341-1:2012)
    BS ISO 19859:2016 GAS TURBINE APPLICATIONS - REQUIREMENTS FOR POWER GENERATION
    PREN 50341-1 : DRAFT 2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    BS EN 50216-4:2015 Power transformer and reactor fittings Basic accessories (earthing terminal, drain and filling devices, thermometer pocket, wheel assembly)
    BS EN 50341-2-23:2016 Overhead electrical lines exceeding AC 1 kV National Normative Aspects (NNA) for SLOVAKIA (based on EN 50341-1:2012)
    PREN 50633 : DRAFT 2014 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - PROTECTION PRINCIPLES FOR AC AND DC ELECTRIC TRACTION SYSTEMS
    I.S. EN 50341-1:2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    UNE-EN 50216-4:2015 Power transformer and reactor fittings - Part 4: Basic accessories (earthing terminal, drain and filling devices, thermometer pocket, wheel assembly)
    14/30244780 DC : 0 BS ISO 19859 - GAS TURBINE APPLICATIONS - REQUIREMENTS FOR POWER GENERATION
    EN 50633:2016 Railway applications - Fixed installations - Protection principles for AC and DC electric traction systems
    EN 50110-1:2013 Operation of electrical installations - Part 1: General requirements
    HD 60364-4-442:2012 Low-voltage electrical installations - Part 4-442: Protection for safety - Protection of low-voltage installations against temporary overvoltages due to earth faults in the high-voltage system and due to faults in the low voltage system

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC TS 60479-1:2005+AMD1:2016 CSV Effects of current on human beings and livestock - Part 1: Generalaspects
    IEC 60050-195:1998 International Electrotechnical Vocabulary (IEV) - Part 195: Earthing and protection against electric shock
    IEC 60364-4-41:2005+AMD1:2017 CSV Low voltage electrical installations - Part 4-41: Protection for safety - Protection against electric shock
    IEC 60050-605:1983 International Electrotechnical Vocabulary (IEV) - Part 605: Generation, transmission and distribution of electricity - Substations
    IEC 60050-601:1985 International Electrotechnical Vocabulary (IEV) - Part 601: Generation, transmission and distribution of electricity - General
    IEC 60050-151:2001 International Electrotechnical Vocabulary (IEV) - Part 151: Electrical and magnetic devices
    HD 60364-4-41:2017/A11:2017 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 4-41: PROTECTION FOR SAFETY - PROTECTION AGAINST ELECTRIC SHOCK
    IEC 60949:1988 Calculation of thermally permissible short-circuit currents, taking into account non-adiabatic heating effects
    IEC TR 61000-5-2:1997 Electromagnetic compatibility (EMC) - Part 5: Installation and mitigation guidelines - Section 2: Earthing and cabling
    IEC 60364-1:2005 Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
    HD 60364-1:2008/A11:2017 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 1: FUNDAMENTAL PRINCIPLES, ASSESSMENT OF GENERAL CHARACTERISTICS, DEFINITIONS
    IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
    IEC 60287-3-1:2017 Electric cables - Calculation of the current rating - Part 3-1: Operating conditions - Site reference conditions
    IEC 60050-826:2004 International Electrotechnical Vocabulary (IEV) - Part 826: Electrical installations
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    IEC 60050-602:1983 International Electrotechnical Vocabulary (IEV) - Part 602: Generation, transmission and distribution of electricity - Generation
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