【AS澳大利亞標準】AS NZS 3599.2-1999 Electric cables—Aerial bundled— Polymeric insulated—Voltages 6.3511(12) kV and 12.722(24) kV Part 2 Non-metallic screened

as/nzs 3599.2:1999australian/new zealand standardelectric cablesaerial bundled polymeric insulatedvoltages6.35/11(12) kv and 12.7/22(24) kvpart 2:non-metallic screenedas/nzs 3599.2:1999this joint australian/new zealand standard was prepared by joint technical committee el/3, electric wires and cables. it was approved on behalf of the council of standards australia on 14 april 1999 on behalf of the council of standards new zealand on 16 april 1999. it was published on 5 june 1999.the following interests are represented on committee el/3:australasian railway association department of defence, australia electrical regulatory authoritieselectricity supply association of australiainstitution of engineers, australiaministr y of commerce, new zealandnew zealand electrical contractors associationnew zealand electrical and electronic manufacturers federationoffice of energy n.s.w.testing interestsreview of standards. to keep abreast of progress in industry, joint australian/ new zealand standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. it is important therefore that standards users ensure that they are in possession of the latest edition, and any amendments thereto.full details of all joint standards and related publications will be found in the standards australia and standards new zealand catalogue of publications; this information is supplemented each month by the magazines the australian standard and standards new zealand, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn standards.suggestions for improvements to joint standards, addressed to the head office of either standards australia or standards new zealand, are welcomed. notification of any inaccuracy or ambiguity found in a joint australian/new zealand standard should be made without delay in order that the matter may be investigated and appropriate action taken.this standard was issued in draft form for comment as dr 97546.as/nzs 3599.2:1999australian/new zealand standardelectric cablesaerial bundled polymeric insulatedvoltages6.35/11(12) kv and 12.7/22(24) kvpart 2:non-metallic screenedo riginated in au stra lia as as 3599.21991. j ointly revi sed a nd de signa te d a s/n zs 3 59 9 .2 :1 999 .published jointly by: standards australia1 the crescent,homebush nsw 2140 australiastandards new zealandlevel 10, radio new zealand house,155 the terrace,wellington 6001 new zealandisbn 0 7337 2753 0as/ nzs 3599.2:19995prefacethis standard was prepared by the joint standards australia/standards new zealand committee el/3, electric wires and cables, and is based on requirements laid down by the electricity supply association of australia. this standard supersedes as 3599.21991.the objective of the standard is to specify construction, dimensions and test requirements for cross-linked polyethylene insulated, non-metallic screened, three phase, aerial bundled cables (abcs), incorporating a support conductor, for working voltages 6.35/11 kv and12.7/22 kv.for reasons of standardization and rationalization, this standard provides for the construction, dimensions, and test requirements of only a limited range of non-metallic screened three-core cables.this standard is complementary to the range ofcablescovered in as 3599.1,electric cablesaerial bundledpolymericinsulatedvoltages6.35/11(12) kvand12.7/22(24) kv, part 1: metallic screened, and in as 1429, electric cablespolymeric insulated, part 1: for working voltages 1.9/3.3(3.6) kv up to and including 19/33(36) kv and part 2: for working voltages above 19/33(36) kv up to and including 76/132(145) kv. other than differing requirements for the insulation screen and the lack of a metallic screen or sheath, this standard is generally compatible with the appropriate requirements specified in those standards.this standard differs from the 1991 edition as follows:(a)cable construction allows for the insulation screen to be either a cross-linked semi- conductive compound or a cross-linked semi-conductive compound with an outer layer of semi-conductive hdpe.(b)tests have been added to table 2 for the case where the insulation screen is xlpeplus hdpe.(c)the tests in table 2 reference the as/nzs 1660 series, test methods for electric cables, cords and conductors (all parts).(d)material tests in table 2 refer to as/nzs 3808, insulating and sheathing materials for electric cables.the term informative has been used in this standard to define the application of the appendix to which it applies. an informative appendix is only for information and guidance.statements expressed in mandatory terms in notes to tables and figures are deemed to be requirements of this standard.contentspage1scope. 42referenced documents. 43definitions. 44designated voltages . 75maximum conductor temperatures . 76phase cable conductors. 77conductor screen . 78insulation . 89insulation screen . 810phase cable marking . 911support conductor. 912laying up . 913preparation for delivery . 914marking of drums. 1215tests . 12appendicesacable data . 19bpurchasing guidelines. 23capplication considerations . 24dtests after installation. 25 copyright st and ard s australia / st and ards n ew zeal andusers of sta ndards are reminded that copyright subsists in all sta ndards au stra lia a nd sta nda rds n ew zeala nd publications and softwa re. except where the copyright act a llows a nd except where provided for below no pu blications or software produ ced by sta nda rds au stra lia or sta ndards n ew zea la nd ma y be reprodu ced, store d in a retrieval system in a ny form or tra nsmitted by a ny mea ns withou t prior permission in writing from sta nda rds au stralia or standa rds n ew zeala nd. permission ma y be conditiona l on an appropria te royalty pa yment. au stra lia n requ ests for permission a nd information on commercia l software royalties shou ld be directed to the hea d office of sta nda rds au stralia. n ew zea la nd requ ests shou ld be directed to sta ndards n ew z ea la nd.up to 10 percent of the technical content pa ges of a standa rd may be copied for u se exclu sively in-hou se by purcha sers of the sta nda rd withou t pa yment of a roya lty or a dvice to sta ndards au stra lia or sta ndards n ew z ea la nd.inclusion of copyright material in computer software programs is also permitted without royalty payment provided such programs are used exclusively in-house by the creators of the programs.care shou ld be tak en to ensure that materia l u sed is from the current edition of the sta nda rd a nd tha t it is u pda ted whenever thesta nda rd is a mended or revised. t he nu mber a nd da te of the sta ndard shou ld therefore be clearly identified.the u se of materia l in print form or in compu ter softwa re progra ms to be u sed commercia lly, with or withou t pa yment, or in commercia l contra cts is su bject to the payment of a roya lty. t his policy ma y be varied by sta ndards au stra lia or sta ndards new zealand at any time.standards australia/standards new zealandaustralian/new zealand standardelectric cablesaerial bundledpolymeric insulated voltages 6.35/11(12) kv and 12.7/22(24) kvpart 2: non-metallic screened1 scopethis standard specifies the construction, dimensions and test requirements for cross-linked polyethylene (xlpe) insulated, non-metallic screened (without further protection), three phase, aerial bundled cables (abc) incorporating a support conductor (see figures 1 and 2), for electricity supply.note: cable data to assist in the selection of the appropriate cables is given in appendix a.2 referenced documentsthe following documents are referred to in this standard: as1125conductors in insulated electric cables and flexible cords1429electric cablespolymeric insulated1429.1part 1:forworkingvoltages1.9/3.3(3.6) kvuptoandincluding19/33(36) kv1531conductorsbare overheadaluminium and aluminium alloy1931high voltage test techniques1931.1part 1:general definitions and test requirements1931.2part 2:measuring systems3983metal drums for insulated electric cables and bare conductorsas/nzs1429electric cablespolymeric insulated1429.2part 2:for working voltages above 19/33(36) kv up to and including76/132(145) kv1660test methods for electric cables, cords and conductors (all parts)2857timber drums for insulated electric cables and bare conductors3808insulating and sheathing materials for electric cablesiec60287electric cablescalculation of the current rating (all parts)3 definitionsfor the purpose of this standard, the definitions below apply:3.1 approximate valuea value that is neither guaranteed nor checked; e.g. it is used to calculate dimensions for cable users.copyrig ht3.2 conductor screena layer or layers of non-metallic semi-conductive material applied directly over the conductor.3.3 direction of laythe slope of the conductor wires or phase cable when the phase cable or, in the case of complete cable, the cable bundle is held vertically. it is right-hand when the slope is in the direction of the central part of the letter z, and left-hand when the slope is in the direction of the central part of the letter s.3.4 installation teststests made on installed cable to demonstrate the integrity of the cable and its accessories.3.5 insulation screena layer of non-metallic semi-conductive material applied directly over the insulation.3.6 length of laythe axial distance of one complete turn of the helix formed by a cable component, e.g. a phase cable.3.7 maximum conductor temperaturethe maximum temperature at which the conductor of the cable may be operated. it is the temperature resulting from the combined effect of the ambient conditions and the current flowing in the conductor.3.8 phase cablean assembly comprising a conductor, semi-conductive conductor screen, insulation and semi-conductive insulation screen (see figures 1 and 2).3.9 re-qualification teststests made by the manufacturer on an already qualified range of cables following any changes in critical cable component materials or in the method of cable manufacture.3.10 routine teststests made by the manufacturer on all production lengths of completed bundled cable to demonstrate its integrity.3.11 sample teststests made by the manufacturer on samples of completed bundled cable, or on components taken from completed bundled cable, at a specified frequency so as to verify that the finished product meets the design specification.3.12 support conductora conductor that supports the three laid-up phase cables and which may act as the earth conductor.3.13 type teststests made by a manufacturer before supplying on a general commercial basis a type of cable covered by this standard, in order to demonstrate satisfactory performance characteristics to meet the intended application. these tests are of such a nature that, afterthey have been made, they need not be repeated, unless changes are made in the cable materials, design or method of manufacture, which might change the performance characteristics.as/ nzs 3599.2:19997figure 1 cross-section of hv abcfigure 2 components of phase cable of hv abc3.14 voltage designationthe rated voltages are expressed in the form uo/u(um)whereuo =the r.m.s. power frequency voltage to earth of the supply system for which the cable is designedu=the r.m.s. power frequency voltage between phases of the supply system for which the cable is designedum =the maximum r.m.s. power-frequency voltage between any two conductors for which cables and accessories are designed. it is the highest voltage that can be sustained under normal operating conditions at any time and at any point in a system. it excludes temporary voltage variations due to fault conditions and sudden disconnection of large loads.4 designated voltagesthe rated voltages uo/u(um) recognized for the purposesof this standard are6.35/11(12) kv and 12.7/22(24) kv.5 maximum conductor temperaturesthe temperature of the phase cable conductor shall not exceed the following values:(a)normal operation . 90c. (b)emergency operation .105c. (c)short-circuit operation (5 s max.).250c.note: the maximum temperatures given are based upon the properties of the insulationmaterials, but in practice they may need to be derated to take account of joints and terminations.the emergency operation temperature is applicable for a period of 30 years, the average cable design life expectancy which allows for no one period exceeding 100 h continuously, and not more than three periods in any 12 consecutive months.at the emergency operating temperature the phase cable may suffer distortion due to external constraints caused by support conductor, terminations or joints.6 phase cable conductorsconductors shall be stranded circular compacted aluminium, made up from wires in theh68 condition, and shall comply with the requirements of as 1125.a rationalized range of conductor cross-sectional areas is given in table 1.7 conductor screen7.1 materialall cables shall have an extruded, cross-linked, semi-conductive conductor screen. a semi- conductive tape may be used as part of the conductor screen and, if used, shall be applied directly on the conductor preceding the extruded layer.7.2 thicknessthe minimum thickness at any point of the extruded layer of conductor screen, determined by the method specified for measurement of insulation thickness in as/nzs 1660, shall be not less than 0.3 mm.as/ nzs 3599.2:199997.3 removal from conductorthe extruded conductor screen shall be readily removable from the conductor.7.4 outer surfacethe outer surface of the conductor screen shall be free from irregularities larger than those given in test 2(c) of table 2.7.5 criteriathe conductor screen in the completed cable shall comply with requirements specified intable 2.7.6 teststhe tests shall be made in accordance with table 2. the category of each test shall be in accordance with table 2.8 insulation8.1 materialinsulation shall be cross-linked polyethylene (xlpe) in accordance with as/nzs 3808 except as modified by this standard.8.2 applicationthe insulation shall bond to the conductor screen so that it is not possible to separate the two without damage to their interface. the insulation shall be homogeneous and shall be applied by the extrusion process.8.3 thicknessthe average thickness of insulation, determined by the method specified in as/nzs 1660, shall be not less than the thickness specified in table 1, and the minimum thickness at any point shall not fall below the specified thickness ( ti) by more than10 percent of the specified thickness (ti) plus 0.1 mm