{"id":240112,"date":"2024-10-19T15:42:54","date_gmt":"2024-10-19T15:42:54","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-60664-12020-tc\/"},"modified":"2024-10-25T10:26:04","modified_gmt":"2024-10-25T10:26:04","slug":"bs-en-iec-60664-12020-tc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-60664-12020-tc\/","title":{"rendered":"BS EN IEC 60664-1:2020 – TC"},"content":{"rendered":"

IEC 60664-1:2020 deals with insulation coordination for equipment having a rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems. This document applies to frequencies up to 30 kHz. It applies to equipment for use up to 2 000 m above sea level and provides guidance for use at higher altitudes. It provides requirements for technical committees to determine clearances, creepage distances and criteria for solid insulation. It includes methods of electrical testing with respect to insulation coordination. The minimum clearances specified in this document do not apply where ionized gases are present. Special requirements for such situations can be specified at the discretion of the relevant technical committee. This document does not deal with distances:\u2013 through liquid insulation; \u2013 through gases other than air; \u2013 through compressed air. This edition includes the following significant technical changes with respect to the previous edition: <\/p>\n

    \n
  1. update of the Scope, Clauses 2 and 3,<\/li>\n
  2. addition of 1 500 V DC into tables,<\/li>\n
  3. new structure for Clauses 4 and 5,<\/li>\n
  4. addition of Annex G with a flowchart for clearances,<\/li>\n
  5. addition of Annex H with a flowchart for creepage distances,<\/li>\n
  6. update of distances altitude correction in a new Table F.10.<\/li>\n<\/ol>\n

    It has the status of a basic safety publication in accordance with IEC Guide 104.<\/p>\n

    PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
    1<\/td>\ncompares BS EN IEC 60664-1:2020 <\/td>\n<\/tr>\n
    2<\/td>\nTRACKED CHANGES
    Text example 1 \u2014 indicates added text (in green) <\/td>\n<\/tr>\n
    3<\/td>\nCompliance with a British Standard cannot confer immunity from legal obligations.
    Amendments\/corrigenda issued since publication <\/td>\n<\/tr>\n
    5<\/td>\nEndorsement notice <\/td>\n<\/tr>\n
    8<\/td>\nInsulation coordination for equipment within low-voltage supply systems \u2013 Part 1: Principles, requirements and tests <\/td>\n<\/tr>\n
    13<\/td>\nINTERNATIONAL ELECTROTECHNICAL COMMISSION
    FOREWORD <\/td>\n<\/tr>\n
    14<\/td>\n\u2013 Terms defined in Clause 3: in bold type. <\/td>\n<\/tr>\n
    15<\/td>\nINSULATION COORDINATION FOR EQUIPMENT WITHIN LOW-VOLTAGE SUPPLY SYSTEMS \u2013
    1 Scope and object <\/td>\n<\/tr>\n
    16<\/td>\n2 Normative references <\/td>\n<\/tr>\n
    17<\/td>\n3 Terms and, definitions and abbreviated terms
    3.1 Terms and definitions
    3.1.1
    3.1.2 <\/td>\n<\/tr>\n
    18<\/td>\n3.13.1.3
    3.23.1.4
    3.33.1.5
    3.43.1.6
    3.53.1.7
    3.1.8
    3.1.9
    3.63.1.10 <\/td>\n<\/tr>\n
    19<\/td>\n3.73.1.11
    3.7.13.1.12
    3.7.23.1.13
    3.7.3
    3.7.4
    3.7.5
    3.83.1.14
    3.8.13.1.15
    3.8.2 <\/td>\n<\/tr>\n
    20<\/td>\n3.8.3
    3.8.43.1.16
    3.93.1.17
    3.9.13.1.18
    3.9.23.1.19
    3.9.3
    3.9.4 <\/td>\n<\/tr>\n
    21<\/td>\n3.103.1.20
    3.11
    3.123.1.21
    3.12.13.1.22
    3.12.2
    3.1.23
    3.1.24
    3.133.1.25
    3.143.1.26 <\/td>\n<\/tr>\n
    22<\/td>\n3.153.1.27
    3.16
    3.173.1.28
    3.17.13.1.29
    3.17.23.1.30
    3.17.33.1.31 <\/td>\n<\/tr>\n
    23<\/td>\n3.17.43.1.32
    3.17.53.1.33
    3.183.1.34
    3.18.13.1.35
    3.18.23.1.36 <\/td>\n<\/tr>\n
    24<\/td>\n3.18.33.1.37
    3.18.43.1.38
    3.18.53.1.39
    3.18.6
    NOTE\u2003For a.c. tests the r.m.s. value may be used.
    3.1.40
    Note 1 to entry:\u2003For AC tests, the RMS value may be used.
    3.19 <\/td>\n<\/tr>\n
    25<\/td>\n3.19.1
    3.19.2
    3.1.41
    3.1.42
    3.19.33.1.43
    3.203.1.44
    3.20.1
    3.20.2
    3.1.45
    3.1.46
    3.20.33.1.47 <\/td>\n<\/tr>\n
    26<\/td>\n3.2 Abbreviated terms
    4 BasisBasic technical characteristics for insulation coordination
    4.1 General <\/td>\n<\/tr>\n
    27<\/td>\n4.2 Insulation coordination with regard to voltage
    4.2 Voltages
    4.2.1 General aspects
    4.2.2 Insulation coordination with regard to long-term a.c. or d.c. voltages
    4.2.2 Transient overvoltages <\/td>\n<\/tr>\n
    28<\/td>\n4.2.3 Insulation coordination with regard to transient overvoltage
    4.2.5 Insulation coordination with regard to temporary overvoltage <\/td>\n<\/tr>\n
    29<\/td>\n4.3 Voltages and voltage ratings
    4.3.2 Determination of voltage for long-term stresses
    4.3.2.2 Voltage for dimensioning basic insulation <\/td>\n<\/tr>\n
    30<\/td>\n4.3.2.2.2 Systems, equipment and internal circuits not energized directly from the low-voltage mains
    4.3.2.3 Voltage for dimensioning functional insulation
    4.3.3 Determination of rated impulse voltage
    4.2.2.2 Transient overvoltages entering through the mains supply
    4.2.2.3 Transient overvoltages generated by external circuits
    4.2.2.4 Transient overvoltages generated internally in the equipment
    4.2.2.5 Attenuation of transient overvoltage levels <\/td>\n<\/tr>\n
    31<\/td>\n4.2.3 Temporary overvoltages
    4.2.4 Recurring peak voltage
    Figure 1 \u2013 Recurring peak voltage <\/td>\n<\/tr>\n
    32<\/td>\n4.2.5 Steady-state working voltage
    4.2.6 Steady-state peak voltage
    4.3.3.24.3 Overvoltage categories
    4.3.3.2.14.3.1 General
    4.3.3.2.24.3.2 Equipment energized directly from the mains supply mains <\/td>\n<\/tr>\n
    33<\/td>\n4.3.3.2.34.3.3 Systems and equipment not energized directly from the low-voltage mains supply
    4.3.3.3 Selection of rated impulse voltage for equipment
    4.3.3.4 Impulse voltage insulation coordination within equipment
    4.3.3.4.2 Parts or circuits within equipment specifically protected against transient overvoltages
    4.3.3.5 Switching overvoltage generated by the equipment <\/td>\n<\/tr>\n
    34<\/td>\n4.3.3.6 Interface requirements
    4.3.4 Determination of recurring peak voltage
    Figure 1 \u2013 Recurring peak voltage <\/td>\n<\/tr>\n
    35<\/td>\n4.3.5.2 Fault voltage
    4.3.5.3 Stress due to temporary overvoltages
    4.4 Frequency
    4.5 Time under voltage stress
    4.4 Frequency
    4.4.1 General
    4.4.2 Solid insulation <\/td>\n<\/tr>\n
    36<\/td>\n4.64.5 Pollution
    4.6.14.5.1 General
    4.6.24.5.2 Degrees of pollution in the micro-environment
    \u2013 Pollution degree 1
    \u2013 Pollution degree 2
    \u2013 Pollution degree 3
    \u2013 Pollution degree 4
    4.6.34.5.3 Conditions of conductive pollution
    4.7 Information supplied with the equipment <\/td>\n<\/tr>\n
    37<\/td>\n4.8 Insulating material
    4.8.1 Comparative tracking index (CTI)
    4.8.1.2 CTI values to categorize insulating materials
    4.8.1.3 Material groups <\/td>\n<\/tr>\n
    38<\/td>\n4.8.1.4 Test for comparative tracking index (CTI)
    4.8.1.5 Non tracking materials
    4.8.2 Electric strength characteristics
    4.8.3 Thermal characteristics
    4.8.4 Mechanical and chemical characteristics
    5 Requirements and dimensioning rules
    5.1 Dimensioning of clearances
    5.1.2 Dimensioning criteria <\/td>\n<\/tr>\n
    39<\/td>\n5.1.2.2 Dimensioning to withstand transient overvoltages
    5.1.2.3 Dimensioning to withstand steady-state voltages, temporary overvoltages or recurring peak voltages
    5.1.3 Electric field conditions
    5.1.3.2 Inhomogeneous field conditions (case A of Table F.2)
    5.1.3.3 Homogeneous field conditions (case B of Table F.2) <\/td>\n<\/tr>\n
    40<\/td>\n5.1.4 Altitude
    5.1.5 Dimensioning of clearances of functional insulation
    5.1.6 Dimensioning of clearances of basic, supplementary and reinforced insulation <\/td>\n<\/tr>\n
    41<\/td>\n5.1.7 Isolating distances
    5.2 Dimensioning of creepage distances
    5.2.2 Influencing factors
    5.2.2.2 Voltage
    5.2.2.3 Pollution
    5.2.2.4 Orientation and location of a creepage distance <\/td>\n<\/tr>\n
    42<\/td>\n5.2.2.5 Shape of insulating surface
    5.2.2.6 Relationship to clearance
    5.2.2.7 Creepage distances where more than one material is used or more than one pollution degree occurs
    5.2.2.8 Creepage distances split by floating conductive part
    5.2.3 Dimensioning of creepage distances of functional insulation
    5.2.4 Dimensioning of creepage distances of basic, supplementary and reinforced insulation <\/td>\n<\/tr>\n
    43<\/td>\n5.2.5 Reduction of creepage distances with the use of a rib (ribs)
    Figure 2 \u2013 Determination of the width (W) and height (H) of a rib
    4.6 Insulating material
    4.6.1 Solid insulation <\/td>\n<\/tr>\n
    44<\/td>\n5.3 Requirements for design of solid insulation
    5.3.1 General
    5.3.24.6.2 Stresses
    5.3.2.14.6.2.1 General
    5.3.2.2 Short-term stresses and their effects <\/td>\n<\/tr>\n
    45<\/td>\n5.3.2.2.2 Heating
    5.3.2.2.34.6.2.2 Mechanical shock
    5.3.2.3.14.6.2.3 Partial discharges (PD)
    5.3.2.3.2 Heating <\/td>\n<\/tr>\n
    46<\/td>\n4.6.2.4 Other stresses
    4.6.3 Comparative tracking index (CTI)
    4.6.3.2 Comparative tracking index (CTI) values to categorize insulating materials
    4.6.3.3 Test for comparative tracking index (CTI)
    4.6.3.4 Non- tracking materials <\/td>\n<\/tr>\n
    47<\/td>\n4.7 Environmental aspects
    4.7.1 General
    4.7.2 Altitude
    4.7.3 Temperature
    5.3.2.3.3 Mechanical stresses
    4.7.4 Vibrations
    5.3.2.3.44.7.5 Humidity
    4.8 Duration of voltage stress <\/td>\n<\/tr>\n
    48<\/td>\n4.9 Electrical field distribution
    5 Design for insulation coordination
    5.1 General
    5.1.1 Means of insulation coordination
    5.1.2 Frequency above 30 kHz
    5.1.3 Reduced distances due to coating or potting
    5.1.4 Equipment which are not connected to public low-voltage systems.
    5.2 Dimensioning of clearances
    5.2.1 General <\/td>\n<\/tr>\n
    49<\/td>\n5.2.2 Dimensioning criteria for clearances
    5.2.2.2 Selection of rated impulse withstand voltage for equipment
    5.2.2.3 Dimensioning to withstand transient overvoltages
    5.2.2.4 Dimensioning to withstand steady-state peak voltages, temporary overvoltages or recurring peak voltages
    5.2.3 Other factors involving clearances <\/td>\n<\/tr>\n
    50<\/td>\n5.2.3.2 Inhomogeneous field conditions (case A of Table F.2)
    5.2.3.3 Homogeneous field conditions (case B of Table F.2)
    5.2.3.4 Altitude correction
    5.2.3.5 Pollution degree in micro-environment
    5.2.4 Dimensioning of clearances of functional insulation
    5.2.5 Dimensioning of clearances of basic insulation, supplementary insulation and reinforced insulation <\/td>\n<\/tr>\n
    51<\/td>\n5.3 Dimensioning of creepage distances
    5.3.1 General <\/td>\n<\/tr>\n
    52<\/td>\n5.3.2 Dimensioning criteria of creepage distances
    5.3.2.2 Determination of the voltage
    5.3.2.3 Determination of the pollution degree
    5.3.2.4 Determination of the material group
    5.3.2.5 Relationship of creepage distance to clearance <\/td>\n<\/tr>\n
    53<\/td>\n5.3.3 Other factors involving creepage distances
    5.3.3.2 Orientation of creepage distances
    5.3.3.3 Shape of insulating surface
    5.3.3.4 Duration of the voltage stress
    5.3.3.5 Creepage distances where more than one material is used or more than one pollution degree occurs
    5.3.3.6 Creepage distances split by floating conductive parts <\/td>\n<\/tr>\n
    54<\/td>\n5.3.3.7 Reduction of required creepage distances by using ribs
    Figure 2 \u2013 Determination of the width (W) and height (H) of a rib
    5.3.4 Dimensioning of creepage distances of functional insulation <\/td>\n<\/tr>\n
    55<\/td>\n5.3.5 Dimensioning of creepage distances of basic insulation, supplementary insulation and reinforced insulation
    \u2013 the rated insulation voltage;
    5.3.2.4 Other stresses
    \u2013 the effect of migration of plasticizers,
    5.3.35.4 Requirements for design of solid insulation
    5.3.3.15.4.1 General <\/td>\n<\/tr>\n
    56<\/td>\n5.4.2 Voltage stress
    5.3.3.25.4.3 Withstand of voltage stresses
    5.3.3.2.35.4.3.2 Temporary withstand overvoltages <\/td>\n<\/tr>\n
    57<\/td>\n5.3.3.2.45.4.3.3 Recurring peak voltages
    5.4.3.4 Steady-state voltages <\/td>\n<\/tr>\n
    58<\/td>\n5.4.4 Withstand on environmental stresses
    5.3.3.45.4.4.2 Withstand of mechanical stresses
    5.3.3.55.4.4.3 Withstand of long-term heating stresses
    5.3.3.65.4.4.4 Withstand of the effects of humidity
    5.3.3.7 Withstand of other stresses
    5.4.4.5 Other factors impacting solid insulation
    6 Tests and measurements
    6.1 Tests
    6.1.16.1 General <\/td>\n<\/tr>\n
    59<\/td>\n6.2 Verification of clearances
    6.2.1 General
    6.1.2 Test for verification of clearances <\/td>\n<\/tr>\n
    60<\/td>\n6.1.2.26.2.2 Test voltages
    6.1.2.2.1.26.2.2.1.2 Selection of impulse test voltage
    6.1.2.2.1.3 Explanations to Table F.5 <\/td>\n<\/tr>\n
    61<\/td>\n6.1.2.2.26.2.2.1.3 Alternatives to impulse voltage dielectric tests
    6.1.2.2.2.16.2.2.1.3.1 General <\/td>\n<\/tr>\n
    62<\/td>\n6.1.2.2.2.26.2.2.1.3.2 Dielectric test with a.c.AC voltage
    6.1.2.2.2.36.2.2.1.3.3 Dielectric test with d.c.DC voltage
    6.2.2.1.4 Altitude correction for testing at altitudes different than 2 000 m <\/td>\n<\/tr>\n
    63<\/td>\n6.3 Verification of creepage distances
    6.4 Verification of solid insulation
    6.4.1 General
    6.1.3 Tests for the verification of solid insulation
    6.1.3.16.4.2 Selection of tests <\/td>\n<\/tr>\n
    65<\/td>\n6.1.3.26.4.3 Conditioning
    6.1.3.36.4.4 Impulse voltage test <\/td>\n<\/tr>\n
    66<\/td>\n6.1.3.3.26.4.4.2 Acceptance criteria
    6.1.3.46.4.5 A.C.AC power frequency voltage test <\/td>\n<\/tr>\n
    67<\/td>\n6.1.3.4.26.4.5.2 Acceptance criteria
    6.1.3.56.4.6 Partial discharge test <\/td>\n<\/tr>\n
    68<\/td>\n6.1.3.5.26.4.6.2 Verification
    6.1.3.5.36.4.6.3 Test procedure <\/td>\n<\/tr>\n
    69<\/td>\nFigure 3 \u2013 Test voltages <\/td>\n<\/tr>\n
    70<\/td>\n6.1.3.5.4.26.4.6.4.2 Test result
    6.1.3.66.4.7 DC voltage test
    6.1.3.76.4.8 High-frequency voltage test
    6.1.46.5 Performing dielectric tests on complete equipment
    6.1.4.16.5.1 General <\/td>\n<\/tr>\n
    71<\/td>\n6.1.4.26.5.2 Parts to be tested
    6.1.4.36.5.3 Preparation of equipment circuits
    6.1.4.46.5.4 Test voltage values
    6.1.4.56.5.5 Test criteria <\/td>\n<\/tr>\n
    72<\/td>\n6.1.56.6 Other tests
    6.1.5.16.6.1 Test for purposes other than insulation coordination
    6.1.5.26.6.2 Sampling and routine tests
    6.1.66.6.3 Measurement accuracy of test parameters
    6.2 Measurement of creepage distances and clearances
    The dimension X, specified in the following examples, has a minimum value depending on the pollution degree as follows: <\/td>\n<\/tr>\n
    73<\/td>\n6.7 Measurement of the attenuation of the transient overvoltages
    6.8 Measurement of clearances and creepage distances <\/td>\n<\/tr>\n
    78<\/td>\nTable 1 \u2013 Dimensioning of grooves
    Figure 4 \u2013 Across the groove
    Figure 5 \u2013 Contour of the groove <\/td>\n<\/tr>\n
    79<\/td>\nFigure 6 \u2013 Contour of the groove with angle
    Figure 7 \u2013 Contour of rib
    Figure 8 \u2013 Uncemented joint with grooves less than X <\/td>\n<\/tr>\n
    80<\/td>\nFigure 9 \u2013 Uncemented joint with grooves equal to or more than X
    Figure 10 \u2013 Uncemented joint with a groove on one side less than X <\/td>\n<\/tr>\n
    81<\/td>\nFigure 12 \u2013 Creepage distance and clearance to a head of screw more than X
    Figure 13 \u2013 Creepage distance and clearance to a head of screw less than X
    Figure 14 \u2013 Creepage distance and clearance with conductive floating part <\/td>\n<\/tr>\n
    82<\/td>\nAnnex A
    (informative)
    Table A.1 \u2013 Withstand voltages in kilovolts for an altitude of 2 000 m above sea level (1 of 2) <\/td>\n<\/tr>\n
    83<\/td>\nTable A.2 \u2013 Altitude correction factors for clearance correction <\/td>\n<\/tr>\n
    85<\/td>\nFigure A.1 \u2013 Withstand voltage at 2 000 m above sea level <\/td>\n<\/tr>\n
    87<\/td>\nFigure A.2 \u2013 Experimental data measured at approximately sea level and their low limits for inhomogeneous field <\/td>\n<\/tr>\n
    89<\/td>\nFigure A.3 \u2013 Experimental data measured at approximately sea level and their low limits for homogeneous field <\/td>\n<\/tr>\n
    90<\/td>\nAnnex B
    (informative)
    Table B.1 \u2013 Inherent control or equivalent protective control <\/td>\n<\/tr>\n
    91<\/td>\nTable B.2 \u2013 Cases where protective control is necessary and control is provided by surge arrestersprotective device having a ratio of clamping voltage protection level to rated voltage not smaller than that specified byin IEC 60099-1IEC 61643 (all parts) <\/td>\n<\/tr>\n
    92<\/td>\nAnnex C
    (normative)
    C.1 Test circuits
    C.1.1 General
    C.1.2 Test circuit for earthed test specimen (Figure C.1)
    Figure C.1 \u2013 Earthed test specimen <\/td>\n<\/tr>\n
    93<\/td>\nC.1.3 Test circuit for unearthed test specimen (Figure C.2)
    Figure C.2 \u2013 Unearthed test specimen
    C.1.4 Selection criteria
    C.1.5 Measuring impedance <\/td>\n<\/tr>\n
    94<\/td>\nC.1.6 Coupling capacitor Ck
    C.1.7 Filter
    C.2 Test parameters
    C.2.1 General
    C.2.2 Requirements for the test voltage
    C.2.3 Climatic conditions
    C.3 Requirements for measuring instruments
    C.3.1 General <\/td>\n<\/tr>\n
    95<\/td>\nC.3.2 Classification of PD meters
    C.3.3 Bandwidth of the test circuit
    C.4 Calibration
    C.4.1 Calibration of discharge magnitude before the noise level measurement <\/td>\n<\/tr>\n
    96<\/td>\nFigure C.3 \u2013 Calibration for earthed test specimen <\/td>\n<\/tr>\n
    97<\/td>\nFigure C.4 \u2013 Calibration for unearthed test specimen
    C.4.2 Verification of the noise level
    C.4.3 Calibration for the PD test
    C.4.4 Calibration pulse generator <\/td>\n<\/tr>\n
    99<\/td>\nAnnex D
    (informative)
    D.1 Measurement of partial discharge (PD), PD inception and extinction voltage
    D.2 Description of PD test circuits (Figure D.1) <\/td>\n<\/tr>\n
    100<\/td>\nFigure D.1 \u2013 Partial discharge test circuits
    D.3 Precautions for reduction of noise
    D.3.1 General
    D.3.2 Sources of noise <\/td>\n<\/tr>\n
    101<\/td>\nD.3.2.1D.3.2 Sources in the non-energized test circuit
    D.3.2.2D.3.3 Sources in the energized test circuit
    D.3.3D.3.4 Measures for reduction of noise
    D.4 Application of multiplying factors for test voltages
    D.4.1 General
    D.4.2 Example 1 (Circuitcircuit connected to the low-voltage mains supply)
    D.4.2.2 PDPartial discharge extinction voltage UeUextinction (basic insulation) <\/td>\n<\/tr>\n
    102<\/td>\nD.4.2.3 Initial value of the PD test voltage U1 (basic insulation)
    D.4.3 Example 2 (Internalinternal circuit with maximum recurring peak voltage Urp)
    D.4.3.2 Initial value of the PD test voltage U1 (basic insulation) <\/td>\n<\/tr>\n
    103<\/td>\nAnnex E
    (informative) <\/td>\n<\/tr>\n
    104<\/td>\nFigure E.1 \u2013 Comparison between creepage distances specified in Table F.4 Table F.5 and clearances in Table A.1 <\/td>\n<\/tr>\n
    105<\/td>\nAnnex F
    (normative)
    Table F.1 \u2013 Rated impulse withstand voltage for equipment energized directly from the low-voltage mains supply <\/td>\n<\/tr>\n
    106<\/td>\nTable F.2 \u2013 Clearances to withstand transient overvoltages <\/td>\n<\/tr>\n
    107<\/td>\nTable F.3aTable F.3 \u2013 Single-phase three-wire or two-wire a.c.AC or d.c.DC systems <\/td>\n<\/tr>\n
    108<\/td>\nTable F.3bTable F.4 \u2013 Three-phase four-wire or three-wire a.c.AC systems <\/td>\n<\/tr>\n
    109<\/td>\nTable F.4Table F.5 \u2013 Creepage distances to avoid failure due to tracking (1 of 2) <\/td>\n<\/tr>\n
    111<\/td>\nTable F.5Table F.6 \u2013 Test voltages for verifying clearances only at different altitudes
    Table F.6Table F.7 \u2013 Severities for conditioning of solid insulation <\/td>\n<\/tr>\n
    112<\/td>\nTable F.7\u2013 Clearances to withstand steady-state voltages, temporary overvoltages or recurring peak voltages
    Table F.7aTable F.8 \u2013 Dimensioning of clearances to withstand steady-state peak voltages, temporary overvoltages or recurring peak voltages b <\/td>\n<\/tr>\n
    114<\/td>\nTable F.8 \u2013 Altitude correction factors
    Table F.10 \u2013 Altitude correction factors for clearance correction <\/td>\n<\/tr>\n
    115<\/td>\nAnnex G
    (informative)
    Figure G.1 \u2013 Determination of clearance distances according to 5.2 (1 of 2) <\/td>\n<\/tr>\n
    117<\/td>\nAnnex H
    (informative)
    Figure H.1 \u2013 Determination of creepage distances according to 5.3 (1 of 2) <\/td>\n<\/tr>\n
    118<\/td>\nFigure H.1 \u2013 Determination of creepage distances according to 5.3 (2 of 2) <\/td>\n<\/tr>\n
    119<\/td>\nBibliography <\/td>\n<\/tr>\n
    121<\/td>\nAnnex ZA
    (normative) <\/td>\n<\/tr>\n
    124<\/td>\nundefined <\/td>\n<\/tr>\n
    127<\/td>\nAnnex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
    130<\/td>\nEnglish
    CONTENTS <\/td>\n<\/tr>\n
    134<\/td>\nFOREWORD <\/td>\n<\/tr>\n
    136<\/td>\n1 Scope
    2 Normative references <\/td>\n<\/tr>\n
    137<\/td>\n3 Terms, definitions and abbreviated terms
    3.1 Terms and definitions <\/td>\n<\/tr>\n
    143<\/td>\n3.2 Abbreviated terms
    4 Basic technical characteristics for insulation coordination
    4.1 General <\/td>\n<\/tr>\n
    144<\/td>\n4.2 Voltages
    4.2.1 General aspects <\/td>\n<\/tr>\n
    145<\/td>\n4.2.2 Transient overvoltages <\/td>\n<\/tr>\n
    146<\/td>\n4.2.3 Temporary overvoltages
    4.2.4 Recurring peak voltage <\/td>\n<\/tr>\n
    147<\/td>\n4.2.5 Steady-state working voltage
    4.2.6 Steady-state peak voltage
    4.3 Overvoltage categories
    4.3.1 General
    4.3.2 Equipment energized directly from the mains supply
    Figures
    Figure 1 \u2013 Recurring peak voltage <\/td>\n<\/tr>\n
    148<\/td>\n4.3.3 Systems and equipment not energized directly from the mains supply
    4.4 Frequency
    4.4.1 General
    4.4.2 Solid insulation
    4.5 Pollution
    4.5.1 General <\/td>\n<\/tr>\n
    149<\/td>\n4.5.2 Degrees of pollution in the micro-environment
    4.5.3 Conditions of conductive pollution
    4.6 Insulating material
    4.6.1 Solid insulation <\/td>\n<\/tr>\n
    150<\/td>\n4.6.2 Stresses <\/td>\n<\/tr>\n
    151<\/td>\n4.6.3 Comparative tracking index (CTI) <\/td>\n<\/tr>\n
    152<\/td>\n4.7 Environmental aspects
    4.7.1 General
    4.7.2 Altitude
    4.7.3 Temperature
    4.7.4 Vibrations
    4.7.5 Humidity
    4.8 Duration of voltage stress <\/td>\n<\/tr>\n
    153<\/td>\n4.9 Electrical field distribution
    5 Design for insulation coordination
    5.1 General
    5.1.1 Means of insulation coordination
    5.1.2 Frequency above 30 kHz
    5.1.3 Reduced distances due to coating or potting
    5.1.4 Equipment which are not connected to public low-voltage systems.
    5.2 Dimensioning of clearances
    5.2.1 General <\/td>\n<\/tr>\n
    154<\/td>\n5.2.2 Dimensioning criteria for clearances
    5.2.3 Other factors involving clearances <\/td>\n<\/tr>\n
    155<\/td>\n5.2.4 Dimensioning of clearances of functional insulation
    5.2.5 Dimensioning of clearances of basic insulation, supplementary insulation and reinforced insulation <\/td>\n<\/tr>\n
    156<\/td>\n5.3 Dimensioning of creepage distances
    5.3.1 General <\/td>\n<\/tr>\n
    157<\/td>\n5.3.2 Dimensioning criteria of creepage distances <\/td>\n<\/tr>\n
    158<\/td>\n5.3.3 Other factors involving creepage distances <\/td>\n<\/tr>\n
    159<\/td>\n5.3.4 Dimensioning of creepage distances of functional insulation
    5.3.5 Dimensioning of creepage distances of basic insulation, supplementary insulation and reinforced insulation
    Figure 2 \u2013 Determination of the width (W) and height (H) of a rib <\/td>\n<\/tr>\n
    160<\/td>\n5.4 Requirements for design of solid insulation
    5.4.1 General
    5.4.2 Voltage stress
    5.4.3 Withstand of voltage stresses <\/td>\n<\/tr>\n
    162<\/td>\n5.4.4 Withstand on environmental stresses
    6 Tests and measurements
    6.1 General <\/td>\n<\/tr>\n
    163<\/td>\n6.2 Verification of clearances
    6.2.1 General
    6.2.2 Test voltages <\/td>\n<\/tr>\n
    165<\/td>\n6.3 Verification of creepage distances
    6.4 Verification of solid insulation
    6.4.1 General <\/td>\n<\/tr>\n
    166<\/td>\n6.4.2 Selection of tests <\/td>\n<\/tr>\n
    167<\/td>\n6.4.3 Conditioning
    6.4.4 Impulse voltage test <\/td>\n<\/tr>\n
    168<\/td>\n6.4.5 AC power frequency voltage test
    6.4.6 Partial discharge test <\/td>\n<\/tr>\n
    170<\/td>\n6.4.7 DC voltage test
    Figure 3 \u2013 Test voltages <\/td>\n<\/tr>\n
    171<\/td>\n6.4.8 High-frequency voltage test
    6.5 Performing dielectric tests on complete equipment
    6.5.1 General
    6.5.2 Parts to be tested <\/td>\n<\/tr>\n
    172<\/td>\n6.5.3 Preparation of equipment circuits
    6.5.4 Test voltage values
    6.5.5 Test criteria
    6.6 Other tests
    6.6.1 Test for purposes other than insulation coordination
    6.6.2 Sampling and routine tests
    6.6.3 Measurement accuracy of test parameters <\/td>\n<\/tr>\n
    173<\/td>\n6.7 Measurement of the attenuation of the transient overvoltages
    6.8 Measurement of clearances and creepage distances <\/td>\n<\/tr>\n
    174<\/td>\nFigure 4 \u2013 Across the groove
    Tables
    Table 1 \u2013 Dimensioning of grooves <\/td>\n<\/tr>\n
    175<\/td>\nFigure 5 \u2013 Contour of the groove
    Figure 6 \u2013 Contour of the groove with angle
    Figure 7 \u2013 Contour of rib <\/td>\n<\/tr>\n
    176<\/td>\nFigure 8 \u2013 Uncemented joint with grooves less than X
    Figure 9 \u2013 Uncemented joint with grooves equal to or more than X <\/td>\n<\/tr>\n
    177<\/td>\nFigure 10 \u2013 Uncemented joint with a groove on one side less than X
    Figure 11 \u2013 Creepage distance and clearance through an uncemented joint
    Figure 12 \u2013 Creepage distance and clearance to a head of screw more than X <\/td>\n<\/tr>\n
    178<\/td>\nFigure 13 \u2013 Creepage distance and clearance to a head of screw less than X
    Figure 14 \u2013 Creepage distance and clearance with conductive floating part <\/td>\n<\/tr>\n
    179<\/td>\nAnnexes
    Annex A (informative) Basic data on withstand characteristics of clearances
    Table A.1 \u2013 Withstand voltages for an altitude of 2 000 m above sea level (1 of 2) <\/td>\n<\/tr>\n
    180<\/td>\nTable A.2 \u2013 Altitude correction factors for clearance correction <\/td>\n<\/tr>\n
    181<\/td>\nFigure A.1 \u2013 Withstand voltage at 2 000 m above sea level <\/td>\n<\/tr>\n
    182<\/td>\nFigure A.2 \u2013 Experimental data measured at approximately sea level and their low limits for inhomogeneous field <\/td>\n<\/tr>\n
    183<\/td>\nFigure A.3 \u2013 Experimental data measured at approximately sea level and their low limits for homogeneous field <\/td>\n<\/tr>\n
    184<\/td>\nAnnex B (informative) Nominal voltages of mains supply for different modes of overvoltage control
    Table B.1 \u2013 Inherent control or equivalent protective control <\/td>\n<\/tr>\n
    185<\/td>\nTable B.2 \u2013 Cases where protective control is necessary and control is provided by surge protective device having a ratio of voltage protection level to rated voltagenot smaller than that specified in IEC 61643 (all parts) <\/td>\n<\/tr>\n
    186<\/td>\nAnnex C (normative) Partial discharge test methods
    C.1 Test circuits
    C.1.1 General
    C.1.2 Test circuit for earthed test specimen (Figure C.1)
    Figure C.1 \u2013 Earthed test specimen <\/td>\n<\/tr>\n
    187<\/td>\nC.1.3 Test circuit for unearthed test specimen (Figure C.2)
    C.1.4 Selection criteria
    C.1.5 Measuring impedance
    C.1.6 Coupling capacitor Ck
    C.1.7 Filter
    C.2 Test parameters
    C.2.1 General
    Figure C.2 \u2013 Unearthed test specimen <\/td>\n<\/tr>\n
    188<\/td>\nC.2.2 Requirements for the test voltage
    C.2.3 Climatic conditions
    C.3 Requirements for measuring instruments
    C.3.1 General
    C.3.2 Classification of PD meters <\/td>\n<\/tr>\n
    189<\/td>\nC.3.3 Bandwidth of the test circuit
    C.4 Calibration
    C.4.1 Calibration of discharge magnitude before the noise level measurement <\/td>\n<\/tr>\n
    190<\/td>\nC.4.2 Verification of the noise level
    Figure C.3 \u2013 Calibration for earthed test specimen
    Figure C.4 \u2013 Calibration for unearthed test specimen <\/td>\n<\/tr>\n
    191<\/td>\nC.4.3 Calibration for the PD test
    C.4.4 Calibration pulse generator <\/td>\n<\/tr>\n
    192<\/td>\nAnnex D (informative) Additional information on partial discharge test methods
    D.1 Measurement of partial discharge (PD), PD inception and extinction voltage
    D.2 Description of PD test circuits (Figure D.1)
    Figure D.1 \u2013 Partial discharge test circuits <\/td>\n<\/tr>\n
    193<\/td>\nD.3 Precautions for reduction of noise
    D.3.1 General
    D.3.2 Sources in the non-energized test circuit
    D.3.3 Sources in the energized test circuit
    D.3.4 Measures for reduction of noise
    D.4 Application of multiplying factors for test voltages
    D.4.1 General <\/td>\n<\/tr>\n
    194<\/td>\nD.4.2 Example 1 (circuit connected to mains supply)
    D.4.3 Example 2 (internal circuit with maximum recurring peak voltage Urp) <\/td>\n<\/tr>\n
    195<\/td>\nAnnex E (informative) Comparison of creepage distances specified in Table F.5 and clearances in Table A.1
    Figure E.1 \u2013 Comparison between creepage distances specifiedin Table F.5 and clearances in Table A.1 <\/td>\n<\/tr>\n
    196<\/td>\nAnnex F (normative) Tables
    Table F.1 \u2013 Rated impulse withstand voltage for equipment energized directly from the mains supply <\/td>\n<\/tr>\n
    197<\/td>\nTable F.2 \u2013 Clearances to withstand transient overvoltages <\/td>\n<\/tr>\n
    198<\/td>\nTable F.3 \u2013 Single-phase three-wire or two-wire AC or DC systems <\/td>\n<\/tr>\n
    199<\/td>\nTable F.4 \u2013 Three-phase four-wire or three-wire AC systems <\/td>\n<\/tr>\n
    200<\/td>\nTable F.5 \u2013 Creepage distances to avoid failure due to tracking (1 of 2) <\/td>\n<\/tr>\n
    202<\/td>\nTable F.6 \u2013 Test voltages for verifying clearances only at different altitudes
    Table F.7 \u2013 Severities for conditioning of solid insulation <\/td>\n<\/tr>\n
    203<\/td>\nTable F.8 \u2013 Dimensioning of clearances to withstand steady-state peak voltages, temporary overvoltages or recurring peak voltages b
    Table F.9 \u2013 Additional information concerning the dimensioning of clearances to avoid partial discharge <\/td>\n<\/tr>\n
    204<\/td>\nTable F.10 \u2013 Altitude correction factors for clearance correction <\/td>\n<\/tr>\n
    205<\/td>\nAnnex G (informative) Determination of clearance distances according to 5.2
    Figure G.1 \u2013 Determination of clearance distances according to 5.2 (1 of 2) <\/td>\n<\/tr>\n
    207<\/td>\nAnnex H (informative) Determination of creepage distances according to 5.3
    Figure H.1 \u2013 Determination of creepage distances according to 5.3 (1 of 2) <\/td>\n<\/tr>\n
    209<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    Tracked Changes. Insulation coordination for equipment within low-voltage supply systems – Principles, requirements and tests<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2020<\/td>\n212<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":240117,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[498,2641],"product_tag":[],"class_list":{"0":"post-240112","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-080-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/240112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/240117"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=240112"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=240112"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=240112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}