{"id":241640,"date":"2024-10-19T15:49:40","date_gmt":"2024-10-19T15:49:40","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-66222007-2008\/"},"modified":"2024-10-25T10:39:41","modified_gmt":"2024-10-25T10:39:41","slug":"bs-66222007-2008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-66222007-2008\/","title":{"rendered":"BS 6622:2007 2008"},"content":{"rendered":"

This British Standard specifies requirements and test methods for the construction, dimensions and mechanical and electrical properties of armoured cables with thermosetting insulation for rated voltages from 3.8\/6.6 (7.2) kV up to 19\/33 (36) kV inclusive, designed for a maximum continuous conductor operating temperature of 90 \u00b0C and for a maximum short circuit conductor temperature of 250 \u00b0C, for use in fixed installations such as networks or industrial installations.<\/p>\n

This British Standard specifies single-core and three-core cables for voltages in the range 3.8\/6.6 (7.2) kV up to 19\/33 (36) kV, with:<\/p>\n

    \n
  1. a stranded copper, stranded aluminium or solid aluminium conductor or conductors;<\/li>\n
  2. cross-linked polyethylene or cross-linked ethylene propylene rubber insulation;<\/li>\n
  3. a metallic screening layer of copper wire or copper tape and\/or a metallic armour of aluminium or galvanized steel wire;<\/li>\n
  4. a polyvinyl chloride compound (PVC) or polyethylene (PE) oversheath.<\/li>\n<\/ol>\n
    \n

    NOTE Guidance on the selection of cables is given in Annex A. Information to be supplied by the purchaser, and items to be agreed between the purchaser and the manufacturer, at the time of enquiry and\/or order, are given in Annex B. Recommendations for the installation of cables are given in Annex C. Guidance on the use of cables is given in Annex D.<\/i><\/p>\n<\/blockquote>\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
    PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
    3<\/td>\nContents
    Foreword iii
    1 Scope 1
    2 Normative references 1
    3 Terms and definitions 2
    4 Voltage designation 4
    5 Conductors 4
    6 Conductor screen 4
    7 Insulation 4
    8 Insulation screen 5
    9 Assembly of three-core cables, including inner coverings and fillers 5
    10 Metallic layer 7
    11 Metallic armour 8
    12 Oversheath 9
    13 Marking 10
    14 End sealing 11
    15 Schedule of tests 12
    16 Test conditions 14
    17 Routine tests 14
    18 Sample tests 16
    19 Type tests – Materials 21
    20 Type tests – Electrical 24
    Annexes
    Annex A (informative) Recommendations for the selection of cables 28
    Annex B (normative) Information to be supplied and items to be agreed 32
    Annex C (informative) Recommendations for the installation of cables 33
    Annex D (informative) Guide to use of cables 36
    Annex E (normative) Fictitious calculation method for determination of dimensions of protective coverings 39
    Annex F (normative) Rounding of numbers 42
    Annex G (informative) Guidance on the scope of type tests 43
    Annex H (normative) Thickness measurements 45
    Annex I (normative) Test method for cold strippability of the extruded semi-conducting layer of an insulation screen 46
    Annex J (normative) Method for measurement of resistivity of extruded semi-conducting conductor screen and insulation screen 47
    Annex K (normative) Method for measurement of resistivity of lapped inner covering 51
    Annex L (normative) Wet compatibility test for galvanized steel wires and semi-conducting tape layers 51
    Bibliography 53
    List of figures
    Figure J.2 – Test piece and arrangement of electrodes for measurement of resistivity of the insulation screen 50
    Figure L.1 – Test cell for wet compatibility test of galvanized steel wires and semi-conducting tape layers 52 <\/td>\n<\/tr>\n
    4<\/td>\nList of tables
    Table 1 – Nominal thickness of insulation 5
    Table 2 – Thickness of extruded inner covering 6
    Table 3 – Nominal diameter of round armour wires 8
    Table 4 – Schedule of tests 12
    Table 5 – Tolerances on temperature values 14
    Table 6 – D.C. resistance of copper wire screen 15
    Table 7 – Voltage for partial discharge test 15
    Table 8 – Voltage for test on complete cable 16
    Table 9 – Number of samples for the four-hour voltage test and the hot set test on the insulation 17
    Table 10 – Voltages for four-hour voltage test 20
    Table 11 – Mass of zinc coating 22
    Table 12 – Conditions for oversheath shrinkage test 23
    Table 13 – Compatibility requirements 24
    Table 14 – Tan d in relation to voltage 25
    Table 15 – Tan d in relation to temperature 26
    Table 16 – Voltage for impulse voltage test 27
    Table A.1 – Selection of cables for three-phase a.c. systems 30
    Table C.1 – Bending radius during installation 33
    Table C.2 – Bending radius during installation for cables adjacent to joints or terminations 33
    Table E.1 – Fictitious diameter of conductor 40
    Table E.2 – Increase of diameter for concentric conductors and metallic screens 41 <\/td>\n<\/tr>\n
    5<\/td>\nForeword <\/td>\n<\/tr>\n
    7<\/td>\n1 Scope
    2 Normative references <\/td>\n<\/tr>\n
    8<\/td>\n3 Terms and definitions
    3.1 rated voltage
    3.2 rated voltage U0
    3.3 rated voltage U
    3.4 maximum voltage Um
    3.5 cross-linked polyethylene (XLPE) <\/td>\n<\/tr>\n
    9<\/td>\n3.6 ethylene propylene rubber compound (EPR)
    3.7 polyvinyl chloride compound (PVC)
    3.8 polyethylene (PE)
    3.9 nominal value
    3.10 approximate value
    3.11 fictitious value
    3.12 routine tests
    3.13 sample tests
    3.14 type tests <\/td>\n<\/tr>\n
    10<\/td>\n4 Voltage designation
    5 Conductors
    6 Conductor screen
    7 Insulation <\/td>\n<\/tr>\n
    11<\/td>\nTable 1 Nominal thickness of insulation
    8 Insulation screen
    8.1 General
    8.2 Extruded semi-conducting layer
    9 Assembly of three-core cables, including inner coverings and fillers
    9.1 General <\/td>\n<\/tr>\n
    12<\/td>\n9.2 Inner coverings and fillers
    Table 2 Thickness of extruded inner covering
    9.3 Cables with a collective metallic layer
    9.4 Cables with a metallic layer over each individual core <\/td>\n<\/tr>\n
    13<\/td>\n10 Metallic layer
    10.1 General
    10.2 Metallic screen on each core
    10.3 Collective metallic screen <\/td>\n<\/tr>\n
    14<\/td>\n11 Metallic armour
    11.1 Construction
    11.1.1 General
    Table 3 Nominal diameter of round armour wires
    11.1.2 Material
    11.1.3 Application of armour
    11.1.3.1 Single-core cables
    11.1.3.2 Three-core cables <\/td>\n<\/tr>\n
    15<\/td>\n11.2 Separation sheath
    12 Oversheath
    12.1 General
    12.2 Thickness of oversheath
    12.3 Semi-conducting layer <\/td>\n<\/tr>\n
    16<\/td>\n13 Marking
    13.1 External marking <\/td>\n<\/tr>\n
    17<\/td>\n13.2 Identification of year of manufacture
    13.3 The mark of an approval organization
    13.4 Additional marking
    14 End sealing <\/td>\n<\/tr>\n
    18<\/td>\n15 Schedule of tests
    Table 4 Schedule of tests <\/td>\n<\/tr>\n
    19<\/td>\nTable 4 Schedule of tests (continued) <\/td>\n<\/tr>\n
    20<\/td>\n16 Test conditions
    16.1 Ambient temperature
    16.2 Tolerances on temperature values
    Table 5 Tolerances on temperature values
    16.3 Frequency and waveform of power-frequency test voltages
    17 Routine tests
    17.1 General
    17.2 Spark test on oversheath
    17.3 Conductor resistance <\/td>\n<\/tr>\n
    21<\/td>\n17.4 Copper wire screen resistance
    17.4.1 Method
    17.4.2 Requirement
    Table 6 D.C. resistance of copper wire screen
    17.5 Partial discharge test
    Table 7 Voltage for partial discharge test <\/td>\n<\/tr>\n
    22<\/td>\n17.6 Voltage test on complete cable
    Table 8 Voltage for test on complete cable
    17.7 Cable markings
    17.8 D.C. voltage test on oversheath
    17.8.1 General
    17.8.2 Method
    17.8.3 Requirement
    18 Sample tests
    18.1 General
    18.2 Sampling frequency <\/td>\n<\/tr>\n
    23<\/td>\nTable 9 Number of samples for the four-hour voltage test and the hot set test on the insulation
    18.3 Repetition of sample tests
    18.4 Conductor material and construction
    18.5 Conductor screen
    18.6 Hot set test on insulation <\/td>\n<\/tr>\n
    24<\/td>\n18.7 Dimensions
    18.7.1 Thickness of insulation
    18.7.2 Concentricity of insulation
    18.8 Circularity of cores
    18.8.1 Method
    18.8.2 Requirement
    18.9 Insulation screen
    18.9.1 Application
    18.9.2 Cold strippability <\/td>\n<\/tr>\n
    25<\/td>\n18.10 Metallic screen (wires only)
    18.11 Assembly of three-core cables
    18.12 Separation sheath
    18.13 Semi-conducting lapped inner covering
    18.14 Measurement of armour wires
    18.15 Oversheath thickness <\/td>\n<\/tr>\n
    26<\/td>\n18.16 Four-hour voltage test
    18.16.1 Method
    18.16.2 Requirement
    Table 10 Voltages for four-hour voltage test <\/td>\n<\/tr>\n
    27<\/td>\n19 Type tests – Materials
    19.1 General
    19.2 Conductor screen resistivity
    19.3 Insulation material
    19.4 Insulation screen resistivity
    19.5 Insulation screen cold strippability
    19.6 Semi-conducting lapped inner covering resistivity
    19.7 Separation sheath material
    19.8 Mass of zinc coating of galvanized steel wires
    19.8.1 Method <\/td>\n<\/tr>\n
    28<\/td>\n19.8.2 Requirement
    Table 11 Mass of zinc coating
    19.9 Wrapping test for galvanized steel wires
    19.9.1 Method
    19.9.2 Requirement
    19.10 Wet compatibility test for galvanized steel wires and semi-conducting tape layers
    19.10.1 Method
    19.10.2 Requirements
    19.11 Tensile test for aluminium wires
    19.11.1 Method <\/td>\n<\/tr>\n
    29<\/td>\n19.11.2 Requirement
    19.12 Oversheath
    19.12.1 Material
    19.12.2 Shrinkage (type TS 2 only)
    Table 12 Conditions for oversheath shrinkage test
    19.13 Compatibility test <\/td>\n<\/tr>\n
    30<\/td>\nTable 13 Compatibility requirements
    19.14 Test under fire conditions for PVC sheathed cables
    20 Type tests – Electrical
    20.1 General
    20.2 Partial discharge test <\/td>\n<\/tr>\n
    31<\/td>\n20.3 Bending test
    20.3.1 Method
    20.3.2 Requirements
    20.4 Tan d in relation to voltage
    Table 14 Tan d in relation to voltage
    20.5 Tan d in relation to temperature
    20.5.1 Method <\/td>\n<\/tr>\n
    32<\/td>\n20.5.2 Requirements
    Table 15 Tan d in relation to temperature
    20.6 Heating cycle test
    20.6.1 Method
    20.6.2 Requirement
    20.7 Impulse voltage test <\/td>\n<\/tr>\n
    33<\/td>\nTable 16 Voltage for impulse voltage test <\/td>\n<\/tr>\n
    34<\/td>\n20.8 Four-hour voltage test
    20.9 Adherence of screens at short circuit temperature
    20.9.1 Method
    20.9.2 Requirement <\/td>\n<\/tr>\n
    35<\/td>\nAnnex A (informative) Recommendations for the selection of cables
    A.1 General
    A.2 Voltage ratings
    a) Category A. This category comprises those systems in which any phase conductor that comes in contact with earth or an earth conductor is disconnected from the system within 1 min.
    b) Category B. This category comprises those systems which, under fault conditions, are operated for a short time with one phase…
    c) Category C. This category comprises all systems which do not fall into categories A or B. <\/td>\n<\/tr>\n
    36<\/td>\nA.3 Metallic coverings
    A.4 Selection of metallic coverings in relation to earth fault capacity <\/td>\n<\/tr>\n
    37<\/td>\nA.5 Semi-conducting layer on the oversheath
    a) when the oversheath is required to perform an insulating function during the operation of the cable. This applies when the me…
    b) when damage to the oversheath is likely to lead to corrosion of an essential metallic layer which it protects, due to an environment aggressive to the particular metal.
    A.6 Current carrying capacity <\/td>\n<\/tr>\n
    38<\/td>\nAnnex B (normative) Information to be supplied and items to be agreed
    B.1 Information to be supplied by the purchaser at the time of enquiry and\/or order
    a) length of cable required, and individual drum lengths, if particular drum lengths are required;
    b) voltage designation (see Clause 4);
    c) number of cores;
    d) size of phase conductor;
    e) conductor material (i.e. copper or aluminium) (see Clause 5);
    f) type of conductor (i.e. stranded or solid) (see Clause 5);
    g) type of insulation (i.e. XLPE or EPR) and limiting dimensions (if any) of the cores;
    h) whether the insulation screen is required to be cold strippable (see 8.2);
    i) type of metallic insulation screen (see Clause 10);
    j) cross-sectional area of metallic insulation screen;
    k) if an armour layer with a special construction is required which requires the armour to be made of magnetic material (see 11.1.2);
    l) if a steel armour layer with a specific minimum conductance is required (see 11.1.2 Note);
    m) type of oversheath (i.e. PVC or PE);
    n) nominal thickness of oversheath if a thickness other than that specified in 12.2 is required;
    o) if a d.c. voltage test on the oversheath is required (see 12.3 and 17.8).
    B.2 Items to be agreed between the purchaser and the manufacturer
    a) colour of the oversheath if a colour other than black is required (see 12.1 Note);
    b) sampling frequency for sample tests if different from that specified in 18.2. <\/td>\n<\/tr>\n
    39<\/td>\nAnnex C (informative) Recommendations for the installation of cables
    C.1 Minimum temperature during installation
    C.2 Minimum installation radius
    Table C.1 Bending radius during installation
    Table C.2 Bending radius during installation for cables adjacent to joints or terminations
    C.3 Prevention of moisture ingress <\/td>\n<\/tr>\n
    40<\/td>\nC.4 Joints and terminations
    a) moulded components;
    b) various tapes;
    c) heat shrinkable tubes.
    C.5 Compound filling <\/td>\n<\/tr>\n
    41<\/td>\nC.6 Earthing of armour and screen(s)
    C.7 Tests after installation
    C.7.1 Tests on insulation
    a) The cable should be tested for 5 min with the phase-to-phase voltage of the system applied between the conductor and the metallic screen or sheath.
    b) The cable should be tested for 24 h with the normal operating voltage. <\/td>\n<\/tr>\n
    42<\/td>\nC.7.2 D.C. voltage test on oversheath
    Annex D (informative) Guide to use of cables
    D.1 General
    D.2 Cable selection in relation to installation design
    a) In a solidly or directly earthed system, in general the earth fault current is at least equal to the three-phase or phase-to-phase fault current.
    b) When an earth fault current is specified for a system, it is necessary to ensure that the phase conductor of the cable selected has a corresponding earth fault capacity.
    c) Some work on spiking of cables has been undertaken by the British cable industry and it has shown that, in general, the spiking capability of the screen(s) is less than their through fault capacity. <\/td>\n<\/tr>\n
    43<\/td>\nd) This standard specifies different forms of metallic screen having different earth fault capacities. In general, copper tape s…
    e) It is essential that connections at joints between, and terminations onto, metallic elements carrying fault currents to earth have an earth fault capacity at least equal to that of the metallic elements.
    D.3 Environmental factors
    a) for use as self supporting aerial cables;
    b) for use as submarine cable or for laying in waterlogged conditions;
    c) for use in situations where subsidence is likely, unless special precautions are taken to minimize damage if subsidence should occur;
    d) for use in situations where they could be exposed to excessive heat.
    D.4 Installation <\/td>\n<\/tr>\n
    44<\/td>\nD.5 Storage and handling of drums
    D.6 Incineration of scrap cable <\/td>\n<\/tr>\n
    45<\/td>\nAnnex E (normative) Fictitious calculation method for determination of dimensions of protective coverings
    E.1 General <\/td>\n<\/tr>\n
    46<\/td>\nE.2 Method
    E.2.1 Conductors
    Table E.1 Fictitious diameter of conductor
    E.2.2 Cores
    E.2.3 Diameter over laid-up cores
    E.2.4 Inner coverings
    a) three-core cables:
    b) single-core cables: <\/td>\n<\/tr>\n
    47<\/td>\nE.2.5 Concentric conductors and metallic screens
    Table E.2 Increase of diameter for concentric conductors and metallic screens
    a) tape screen
    b) wire screen (with a counter helix, if any) <\/td>\n<\/tr>\n
    48<\/td>\nE.2.6 Separation sheath
    E.2.7 Armour
    Annex F (normative) Rounding of numbers
    F.1 Rounding of numbers for the purpose of the fictitious calculation method
    a) When the figure in the second decimal place, before rounding, is 0, 1, 2, 3 or 4, then the figure retained in the first decimal place shall remain unchanged (i.e. the value shall be rounded down). <\/td>\n<\/tr>\n
    49<\/td>\nb) When the figure in the second decimal place, before rounding, is 5, 6, 7, 8 or 9, then the figure in the first decimal place shall be increased by one (i.e. the value shall be rounded up).
    F.2 Rounding of numbers for other purposes
    a) If the last figure to be retained is followed, before rounding, by 0, 1, 2, 3 or 4, it shall remain unchanged (i.e. the value shall be rounded down);
    b) If the last figure to be retained is followed, before rounding, by 5, 6, 7, 8 or 9, it shall be increased by one (i.e. the value shall be rounded up).
    Annex G (informative) Guidance on the scope of type tests
    G.1 General <\/td>\n<\/tr>\n
    50<\/td>\nG.2 Invoking of type tests
    G.3 Sequential electrical type tests <\/td>\n<\/tr>\n
    51<\/td>\nG.4 Compatibility test (see 19.13)
    G.5 Type tests on components
    G.6 Evidence of type testing
    Annex H (normative) Thickness measurements
    H.1 Sampling <\/td>\n<\/tr>\n
    52<\/td>\nH.2 Procedure
    a) for the insulation: the minimum thickness and the maximum thickness;
    b) for the separation sheath: the minimum thickness;
    c) for the oversheath: the minimum thickness.
    Annex I (normative) Test method for cold strippability of the extruded semi-conducting layer of an insulation screen <\/td>\n<\/tr>\n
    53<\/td>\nAnnex J (normative) Method for measurement of resistivity of extruded semi- conducting conductor screen and insulation screen
    J.1 Preparation of test pieces
    J.2 Procedure
    J.3 Calculations
    J.3.1 Conductor screen <\/td>\n<\/tr>\n
    54<\/td>\nJ.3.2 Insulation screen <\/td>\n<\/tr>\n
    55<\/td>\nFigure J.1 Test piece and arrangement of electrodes for measurement of resistivity of the conductor screen <\/td>\n<\/tr>\n
    56<\/td>\nFigure J.2 Test piece and arrangement of electrodes for measurement of resistivity of the insulation screen <\/td>\n<\/tr>\n
    57<\/td>\nAnnex K (normative) Method for measurement of resistivity of lapped inner covering
    Annex L (normative) Wet compatibility test for galvanized steel wires and semi-conducting tape layers <\/td>\n<\/tr>\n
    58<\/td>\nFigure L.1 Test cell for wet compatibility test of galvanized steel wires and semi-conducting tape layers <\/td>\n<\/tr>\n
    59<\/td>\nBibliography
    [1] Conf\u00e9rence Internationale des Grands R\u00e9seaux Electriques. Report 1968-21-01 .
    [2] Institute of Electrical and Electronics Engineers. Paper No. 69, CP88-PWR . <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    Electric cables. Armoured cables with thermosetting insulation for rated voltages from 3.8\/6.6 kV to 19\/33 kV. Requirements and test methods<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2008<\/td>\n60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":241645,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[493,2641],"product_tag":[],"class_list":{"0":"post-241640","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-060-20","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\/241640","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\/241645"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=241640"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=241640"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=241640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}