• EN 60071-2 : 1997

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    INSULATION CO-ORDINATION - APPLICATION GUIDE

    Available format(s): 

    Superseded date:  01-05-2018

    Language(s): 

    Published date:  12-01-2013

    Publisher:  European Committee for Standards - Electrical

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

    1 General
        1.1 Scope
        1.2 Normative references
        1.3 List of symbols and definitions
    2 Representative voltage stresses in service
        2.1 Origin and classification of voltage stresses
        2.2 Characteristics of overvoltage protective devices
        2.3 Representative voltages and overvoltages
    3 Co-ordination withstand voltage
        3.1 Insulation strength characteristics
        3.2 Performance criterion
        3.3 Insulation co-ordination procedures
    4 Required withstand voltage
        4.1 General remarks
        4.2 Atmospheric correction
        4.3 Safety factors
    5 Standard withstand voltage and testing procedures
        5.1 General remarks
        5.2 Test conversion factors
        5.3 Determination of insulation withstand by type tests
    6 Special considerations for overhead lines
        6.1 General remarks
        6.2 Insulation co-ordination for operating voltages
              and temporary overvoltages
        6.3 Insulation co-ordination for slow-front overvoltages
        6.4 Insulation co-ordination for lightning overvoltages
    7 Special considerations for substations
        7.1 General remarks
        7.2 Insulation co-ordination for overvoltages
    Tables
    1 Recommended creepage distances
    2 Test conversion factors for range I, to convert required
        switching impulses withstand voltages to short-
        duration power-frequency and lightning impulse
        withstand voltages
    3 Test conversion factors for range II to convert required
        short-duration power-frequency withstand voltages to
        switching impulse withstand voltages
    4 Selectivity of test procedures B and C of IEC 60-1
    A.1 Correlation between standard lightning impulse withstand
        voltages and minimum air clearances
    A.2 Correlation between standard switching impulse withstand
        voltages and minimum phase-to-earth air clearances
    A.3 Correlation between standard switching impulse withstand
        voltages and minimum phase-to-phase air clearances
    C.1 Breakdown voltage versus cumulative flashover
        probability - single insulation and 100 parallel
        insulations
    F.1 Corona damping constant Kco
    F.2 Factor A for various overhead lines
    G.1 Typical gap factors K for switching impulse breakdown
        phase-to-earth
    G.2 Gap factors for typical phase-to-phase geometries
    H.1 Summary of minimum required withstand voltages obtained
        for example H.1.1
    H.2 Summary of required withstand voltages obtained for
        example H.1.2
    H.3 Values related to the insulation co-ordination
        procedure for example H.3
    Figures
    1 Range of 2% slow-front overvoltages at the receiving end
        due to line energization and re-energization
    2 Ratio between the 2% values of slow-front overvoltages
        phase-to-phase and phase-to-earth
    3 Diagram for surge arrester connection to the
        protected object
    4 Distributive discharge probability of self-restoring
        insulation described on a linear scale
    5 Disruptive discharge probability of self-restoring
        insulation described on a Gaussian scale
    6 Evaluation of deterministic co-ordination factor Kcd
    7 Evaluation of the risk of failure
    8 Risk of failure of external insulation for slow-front
        overvoltages as a function of the statistical co-
        ordination factor Kcs
    9 Dependence of exponent m on the co-ordination switching
        impulse withstand voltage
    10 Probability P of an equipment to pass the test dependent
        on the difference K between the actual and the rated
        impulst withstand voltage
    11 Example of a schematic substation layout used for the
        overvoltage stress location (see 7.1)
    B.1 Earth-fault factor k on a base ofXo/X1 for R1/X1=0
    B.2 Relationship between Ro/X1 for constant values of
        earth-fault factor k where R1 = 0
    B.3 Relationship between Ro/X1 et Xo/X1 for constant values
        of earth-fault factor k where R1 - 0.5 X1
    B.4 Relationship between Ro/X1 et Xo/X1 for constant values of
        earth-fault factor k where R1 = X1
    B.5 Relationship between Ro/X1 et Xo/X1 for constant values
        of earth-fault k where R1 = X1
    C.1 Conversion chart for the reduction of the withstand
        voltage due to phasing insulation configurations in
        parallel
    D.1 Example for bivariate phase-to-phase overvoltage curves
        with constant probability density and tangents giving
        the relevant 2% values
    D.2 Principle of the determination of the representative
        phase-to-phase overvoltage Upre
    D.3 Schematic phase-phase-earth insulation configuration
    D.4 Description of the 50% switching impulse flashover
        voltage of a phase-phase-earth insulation
    D.5 Inclination angle of the phase-to-phase insulation
        characteristic in range b dependent on the ratio of
        the phase-phase-clearance D to the height Ht above earth
    E.1 Distributed capacitances of the windings of a transformer
        and the equivalent circuit describing the windings
    E.2 Values of factor J describing the effect of the
        winding connections rn the inductive surge transference
    Annexes
    A Clearances in air to assure a specified impulse withstand
        voltage installation
    B Determination of temporary overvoltages due to earth
        faults
    C Weibull probability distributions
    D Determination of the representative slow-front over-
        voltage due to line energization and re-energization
    E transferred overvoltages in transformers
    F Lightning overvoltages
    G Calculation of air gap breakdown strength from
        experimental data
    H Examples of insulation co-ordination procedure
    J Bibliography
    ZA (normative) Normative references to international
        publications with their corresponding European
        publications

    Abstract - (Show below) - (Hide below)

    Consists of an application guide concerned with selecting insulation levels of equipment or installations for three-phase electrical systems. Gives guidelines for determining the rated withstand voltages for ranges 1 and II of IEC 71-1 and justifies association of these values with standardized highest voltages for equipment.

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

    Committee SR 28
    Development Note Redesignated as EN IEC 60071-2. (05/2018)
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Superseded
    Superseded By
    Supersedes

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

    PREN 50341-1 : DRAFT 2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    UNE-EN 50124-1:2017 Railway applications - Insulation coordination - Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment
    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 IEC 60099-5 : 2018 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS (IEC 60099-5:2018)
    UNE-EN 50341-1:2017 Overhead electrical lines exceeding AC 1 kV - Part 1: General requirements - Common specifications
    BS EN 61472 : 2013 LIVE WORKING - MINIMUM APPROACH DISTANCES FOR A.C. SYSTEMS IN THE VOLTAGE RANGE 72,5 KV TO 800 KV - A METHOD OF CALCULATION
    BS EN 60071-5:2015 Insulation co-ordination Procedures for high-voltage direct current (HVDC) converter stations
    BS EN 61869-1 : 2009 INSTRUMENT TRANSFORMERS - PART 1: GENERAL REQUIREMENTS
    12/30260570 DC : 0 BS EN 50341-1 - OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    CEI EN 61400-24 : 2011 WIND TURBINES - PART 24: LIGHTNING PROTECTION
    UNE-EN 61400-24:2011 Wind turbines -- Part 24: Lightning protection
    CEI EN 61071 : 2007 CAPACITORS FOR POWER ELECTRONICS
    BS EN 60945 : 2002 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS - GENERAL REQUIREMENTS - METHODS OF TESTING AND REQUIRED TEST RESULTS
    BS EN 60143-4 : 2010 SERIES CAPACITORS FOR POWER SYSTEMS - PART 4: THYRISTOR CONTROLLED SERIES CAPACITORS
    BS EN 62823:2015 (published 2015-12) Thyristor valves for thyristor controlled series capacitors (TCSC). Electrical testing
    BS EN 61230 : 2008 LIVE WORKING - PORTABLE EQUIPMENT FOR EARTHING OR EARTHING AND SHORT-CIRCUITING
    BS EN 60143-1:2015 Series capacitors for power systems General
    BS EN 50110-1:2013 Operation of electrical installations General requirements
    BS EN 61071 : 2007 CAPACITORS FOR POWER ELECTRONICS
    CEI CLC/TR 50488 : 2007 RAILWAY APPLICATIONS - SAFETY MEASURES FOR PERSONNEL WORKING NEAR OVERHEAD CONTACT LINES
    BS EN 61000-2-12 : 2003 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 2-12: ENVIRONMENT - COMPATIBILITY LEVELS FOR LOW-FREQUENCY CONDUCTED DISTURBANCES AND SIGNALLING IN PUBLIC MEDIUM-VOLTAGE POWER SUPPLY SYSTEMS
    BS EN 62252 : 2004
    BS EN 50124-1:2017 RAILWAY APPLICATIONS - INSULATION COORDINATION - PART 1: BASIC REQUIREMENTS - CLEARANCES AND CREEPAGE DISTANCES FOR ALL ELECTRICAL AND ELECTRONIC EQUIPMENT
    BS EN 60099-9 : 2014 SURGE ARRESTERS - PART 9: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR HVDC CONVERTER STATIONS
    I.S. EN 50341-1:2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    15/30298489 DC : 0 BS EN 50124-1 - RAILWAY APPLICATIONS - INSULATION COORDINATION - PART 1: BASIC REQUIREMENTS - CLEARANCES AND CREEPAGE DISTANCES FOR ALL ELECTRICAL AND ELECTRONIC EQUIPMENT
    PREN 50124-1 : DRAFT 2015 RAILWAY APPLICATIONS - INSULATION COORDINATION - PART 1: BASIC REQUIREMENTS - CLEARANCES AND CREEPAGE DISTANCES FOR ALL ELECTRICAL AND ELECTRONIC EQUIPMENT
    BS EN 60529:1992+A2:2013 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE)
    UNE-EN 60071-5:2015 Insulation co-ordination - Part 5: Procedures for high-voltage direct current (HVDC) converter stations
    BS EN 50186-1 : 1999 LIVE-LINE WASHING SYSTEMS FOR POWER INSTALLATIONS WITH NOMINAL VOLTAGES ABOVE 1 KV - PART 1: COMMON REQUIREMENTS
    I.S. EN 60726:2003 DRY-TYPE POWER TRANSFORMERS
    CEI EN 62252 : 2005 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS - RADAR FOR CRAFT NOT IN COMPLIANCE WITH IMO SOLAS CHAPTER V - PERFORMANCE REQUIREMENTS, METHODS OF TEST AND REQUIRED TEST RESULTS
    I.S. EN 60143-4:2010 SERIES CAPACITORS FOR POWER SYSTEMS - PART 4: THYRISTOR CONTROLLED SERIES CAPACITORS
    BS EN 60099-5 : 2013 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS
    CEI EN 60945 : 2003 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS - GENERAL REQUIREMENTS - METHODS OF TESTING AND REQUIRED TEST RESULTS
    UNE-EN 50110-1:2014 Operation of electrical installations - Part 1: General requirements
    I.S. EN 60529:1993 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE)
    I.S. EN 62823:2015 THYRISTOR VALVES FOR THYRISTOR CONTROLLED SERIES CAPACITORS (TCSC) - ELECTRICAL TESTING
    I.S. EN 50110-1:2013 OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS
    I.S. EN IEC 60099-5:2018 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS
    BS EN 61400-24 : 2010 WIND TURBINES - PART 24: LIGHTNING PROTECTION
    I.S. EN 60143-1:2015 SERIES CAPACITORS FOR POWER SYSTEMS - PART 1: GENERAL
    EN 62271-100 : 2009 AMD 2/COR 18 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 100: ALTERNATING-CURRENT CIRCUIT-BREAKERS (IEC 62271-100:2008/A2:2017/COR1:2018)
    S.R. CLC/TR 50488:2007 RAILWAY APPLICATIONS - SAFETY MEASURES FOR THE PERSONNEL WORKING ON OR NEAR OVERHEAD CONTACT LINES
    I.S. EN 62252:2004 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS - RADAR FOR CRAFT NOT IN COMPLIANCE WITH IMO SOLAS CHAPTER 5 - PERFORMANCE REQUIREMENTS, METHODS OF TEST AND REQUIRED TEST RESULTS
    BS EN 62271-1:2017 High-voltage switchgear and controlgear Common specifications for alternating current switchgear and controlgear
    I.S. EN 61140:2016 PROTECTION AGAINST ELECTRIC SHOCK - COMMON ASPECTS FOR INSTALLATION AND EQUIPMENT
    I.S. EN 61071:2007 CAPACITORS FOR POWER ELECTRONICS
    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 62271-1:2017 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS FOR ALTERNATING CURRENT SWITCHGEAR AND CONTROLGEAR (IEC 62271-1:2017)
    I.S. EN 60071-5:2015 INSULATION CO-ORDINATION - PART 5: PROCEDURES FOR HIGH-VOLTAGE DIRECT CURRENT (HVDC) CONVERTER STATIONS
    BS EN 50341-1 : 2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    CEI EN 60099-9 : 2015 SURGE ARRESTERS - PART 9: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR HVDC CONVERTER STATIONS
    BS EN 60099-4 : 2014 SURGE ARRESTERS - PART 4: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR A.C. SYSTEMS
    I.S. EN 61400-24:2010 WIND TURBINES - PART 24: LIGHTNING PROTECTION
    VDE 0143-1 : 1999 LIVE-LINE WASHING SYSTEMS FOR POWER INSTALLATIONS WITH RATED VOLTAGES ABOVE 1 KV - PART 1: GENERAL REQUIREMENTS
    CEI EN 60099-5 : 2014 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS
    EN 50124-1:2017 RAILWAY APPLICATIONS - INSULATION COORDINATION - PART 1: BASIC REQUIREMENTS - CLEARANCES AND CREEPAGE DISTANCES FOR ALL ELECTRICAL AND ELECTRONIC EQUIPMENT
    UNE-EN 60099-4:2016 Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems
    BS EN 60204-11 : 2001 SAFETY OF MACHINERY - ELECTRICAL EQUIPMENT OF MACHINES - PART 11: REQUIREMENTS FOR HV EQUIPMENT FOR VOLTAGES ABOVE 1000 V A.C. OR 1500 V D.C. AND NOT EXCEEDING 36 KV
    I.S. EN 60945:2002 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS - GENERAL REQUIREMENTS - METHODS OF TESTING AND REQUIRED TEST RESULTS
    CEI EN 50341-1 : 2013 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    BS EN 60071-1 : 2006 INSULATION CO-ORDINATION - PART 1: DEFINITIONS, PRINCIPLES AND RULES
    CEI EN 60143-4 : 2012 SERIES CAPACITORS FOR POWER SYSTEMS - PART 4: THYRISTOR CONTROLLED SERIES CAPACITORS
    UNE-EN 61472:2014 Live working - Minimum approach distances for a.c systems in the voltage range 72,5 kV to 800 kV - A method of calculation
    EN 61936-1 : 2010 AMD 1 2014 POWER INSTALLATIONS EXCEEDING 1 KV A.C. - PART 1: COMMON RULES (IEC 61936-1:2010/A1:2014)
    EN 50341-1:2012 OVERHEAD ELECTRICAL LINES EXCEEDING AC 1 KV - PART 1: GENERAL REQUIREMENTS - COMMON SPECIFICATIONS
    I.S. EN 50124-1:2017 RAILWAY APPLICATIONS - INSULATION COORDINATION - PART 1: BASIC REQUIREMENTS - CLEARANCES AND CREEPAGE DISTANCES FOR ALL ELECTRICAL AND ELECTRONIC EQUIPMENT
    I.S. EN 61000-2-12:2003 ELECTROMAGNETIC COMPATIBILITY (EMC) - ENVIRONMENT - COMPATIBILITY LEVELS FOR LOW-FREQUENCY CONDUCTED DISTURBANCES AND SIGNALLING IN PUBLIC MEDIUM-VOLTAGE POWER SUPPLY SYSTEMS
    I.S. EN 61936-1:2010 POWER INSTALLATIONS EXCEEDING 1 KV A.C. - PART 1: COMMON RULES
    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)
    I.S. EN 60099-9:2014 SURGE ARRESTERS - PART 9: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR HVDC CONVERTER STATIONS
    CEI EN 60871-1 : 2015 SHUNT CAPACITORS FOR A.C. POWER SYSTEMS HAVING A RATED VOLTAGE ABOVE 1000 V - PART 1: GENERAL
    CLC/TR 50488 : 2006 RAILWAY APPLICATIONS - SAFETY MEASURES FOR THE PERSONNEL WORKING ON OR NEAR OVERHEAD CONTACT LINES
    CEI EN 60099-4 : 2015 SURGE ARRESTERS - PART 4: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR A.C. SYSTEMS
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    CEI EN 50110-1 : 2014 OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS
    I.S. EN 60099-4:2014 SURGE ARRESTERS - PART 4: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR A.C. SYSTEMS
    I.S. HD 637:1999 POWER INSTALLATIONS EXCEEDING 1 KV A.C.
    I.S. EN 62271-1:2017 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS FOR ALTERNATING CURRENT SWITCHGEAR AND CONTROLGEAR
    I.S. EN 62271-100:2009 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 100: ALTERNATING-CURRENT CIRCUIT-BREAKERS
    I.S. EN 62271-109:2009 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 109: ALTERNATING-CURRENT SERIES CAPACITOR BY-PASS SWITCHES (IEC 62271-109:2008 (EQV))
    I.S. EN 60071-1:2006 INSULATION CO-ORDINATION - PART 1: DEFINITIONS, PRINCIPLES AND RULES
    I.S. EN 60099-5:2013 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS (IEC 60099-5:2013 (EQV))
    I.S. EN 60204-11:2000 SAFETY OF MACHINERY - ELECTRICAL EQUIPMENT OF MACHINES PART 11: REQUIREMENTS FOR HV EQUIPMENT FOR VOLTAGES ABOVE 1000 V A.C. OR 1500 V D.C. AND NOT EXCEEDING 36 KV
    EN 62823:2015 THYRISTOR VALVES FOR THYRISTOR CONTROLLED SERIES CAPACITORS (TCSC) - ELECTRICAL TESTING (IEC 62823:2015)
    UNE-EN 61140:2017 Protection against electric shock - Common aspects for installation and equipment
    BS EN 61140 : 2002 PROTECTION AGAINST ELECTRIC SHOCK - COMMON ASPECTS FOR INSTALLATION AND EQUIPMENT
    BS EN 61936-1 : 2010 POWER INSTALLATIONS EXCEEDING 1 KV A.C - PART 1: COMMON RULES
    UNE-EN 61936-1:2012 Power installations exceeding 1 kV a.c. -- Part 1: Common rules
    UNE-EN 61869-1:2010 Instrument transformers -- Part 1: General requirements
    EN 60071-5 : 2015 INSULATION CO-ORDINATION - PART 5: PROCEDURES FOR HIGH-VOLTAGE DIRECT CURRENT (HVDC) CONVERTER STATIONS (IEC 60071-5:2014)
    EN 60099-4:2014 SURGE ARRESTERS - PART 4: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR A.C. SYSTEMS (IEC 60099-4:2014)
    EN 60071-1:2006/A1:2010 INSULATION CO-ORDINATION - PART 1: DEFINITIONS, PRINCIPLES AND RULES
    EN 62271-109:2009/A1:2013 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 109: ALTERNATING-CURRENT SERIES CAPACITOR BY-PASS SWITCHES (IEC 62271-109:2008/A1:2013)
    HD 637 S1:1999/corrigendum:2005 POWER INSTALLATIONS EXCEEDING 1 KV A.C.
    EN 60204-11:2000/corrigendum:2010 SAFETY OF MACHINERY - ELECTRICAL EQUIPMENT OF MACHINES - PART 11: REQUIREMENTS FOR HV EQUIPMENT FOR VOLTAGES ABOVE 1000 V A.C. OR 1500 V D.C. AND NOT EXCEEDING 36 KV
    EN 60143-1:2015/AC:2017-05 Series capacitors for power systems - Part 1: General
    EN 61000-2-12 : 2003 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 2-12: ENVIRONMENT - COMPATIBILITY LEVELS FOR LOW-FREQUENCY CONDUCTED DISTURBANCES AND SIGNALLING IN PUBLIC MEDIUM-VOLTAGE POWER SUPPLY SYSTEMS
    EN 60945:2002 Maritime navigation and radiocommunication equipment and systems - General requirements - Methods of testing and required test results
    EN 61230:2008 LIVE WORKING - PORTABLE EQUIPMENT FOR EARTHING OR EARTHING AND SHORT-CIRCUITING
    EN 61140:2016 PROTECTION AGAINST ELECTRIC SHOCK - COMMON ASPECTS FOR INSTALLATION AND EQUIPMENT (IEC 61140:2016)
    EN 61869-1 : 2009 INSTRUMENT TRANSFORMERS - PART 1: GENERAL REQUIREMENTS
    EN 60099-9 : 2014 SURGE ARRESTERS - PART 9: METAL-OXIDE SURGE ARRESTERS WITHOUT GAPS FOR HVDC CONVERTER STATIONS
    EN 60143-4 : 2010 SERIES CAPACITORS FOR POWER SYSTEMS - PART 4: THYRISTOR CONTROLLED SERIES CAPACITORS
    EN 62252 : 2004 Maritime navigation and radiocommunication equipment and systems - Radar for craft not in compliance with IMO SOLAS Chapter V - Performance requirements, methods of test and required test results
    EN 61400-24 : 2010 WIND TURBINES - PART 24: LIGHTNING PROTECTION
    EN 61472:2013/AC:2015 LIVE WORKING - MINIMUM APPROACH DISTANCES FOR A.C SYSTEMS IN THE VOLTAGE RANGE 72,5 KV TO 800 KV - A METHOD OF CALCULATION (IEC 61472:2013)
    EN 61071 : 2007 CAPACITORS FOR POWER ELECTRONICS
    EN 50110-1:2013 OPERATION OF ELECTRICAL INSTALLATIONS - PART 1: GENERAL REQUIREMENTS
    EN 60099-5:2013 SURGE ARRESTERS - PART 5: SELECTION AND APPLICATION RECOMMENDATIONS (IEC 60099-5:2013)

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

    IEC 60099-4:2014 Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems
    IEC 60056:1987 High-voltage alternating-current circuit-breakers
    IEC 60505:2011 Evaluation and qualification of electrical insulation systems
    IEC 60099-1:1991+AMD1:1999 CSV Surge arresters - Part 1: Non-linear resistor type gapped surge arresters for a.c. systems
    IEC 60099-5:2013 Surge arresters - Part 5: Selection and application recommendations
    IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
    IEC 60507:2013 Artificial pollution tests on high-voltage ceramic and glass insulators to be used on a.c. systems
    IEC 60071-1:2006+AMD1:2010 CSV Insulation co-ordination - Part 1: Definitions, principles and rules
    IEC 60721-2-3:2013 Classification of environmental conditions - Part 2-3: Environmental conditions appearing in nature - Air pressure
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