1、Designation: D 1351 02An American National StandardStandard Specification forThermoplastic Polyethylene Insulation for Electrical Wireand Cable1This standard is issued under the fixed designation D 1351; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers a thermoplastic insulationwhich consists substantially of
3、polyethylene.1.2 This type of insulation is considered suitable for con-tinuous operation for conductor temperatures up to 75C witha maximum conductor size of 1000 kcmil (507 mm2). Themaximum voltage rating shall not exceed 35 000 V for powerapplication or 9 000 V for series lighting.1.3 In many ins
4、tances the insulation material cannot betested unless it has been formed around a conductor or cable.Therefore, tests done on insulated wire or cable in thisdocument are solely to determine the relevant property of theinsulation material and not to test the insulated conductor orcompleted cable.1.4
5、Whenever two sets of values are presented, in differentunits, the values in the first set are the standard, while those inparentheses are for information only.2. Referenced Documents2.1 ASTM Standards:D 1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and Cable2D 1711 Termino
6、logy Relating to Electrical Insulation3D 2308 Specification for Thermoplastic PolyethyleneJacket for Electrical Wire and Cable3D 2633 Methods of Testing Thermoplastic Insulations andJackets for Wire and Cable4D 3349 Test Method for Absorption Coefficient of EthylenePolymer Material Pigmented with Ca
7、rbon Black42.2 ICEA Standard:T-24-380 Guide for Partial-Discharge Procedure53. Terminology3.1 Definitions:3.1.1 Refer to Terminology D 1711 for definitions pertinentto this specification.3.2 Definition of Term Specific to This Standard:3.2.1 aging, nexposure of materials to air at 100C for 48h.4. Co
8、nductor Shields4.1 Use conductor shields on solid and stranded conductorsof power cables having rated circuit voltages above 2000 V.This requirement does not apply to series lighting cables.Conductor shielding is conducting material at least 0.0025 in.(0.06 mm) thick applied over the surface of the
9、conductor. Itmay be conducting nonmetallic tape, conducting compound, orconducting cement.5. Physical Properties5.1 The polyethylene, before application to the conductor,shall comply with the requirements of Specification D 1248 forType I; Class A, B or C; Category 4 or 5; Grade E4 or E5. Therequire
10、ments of Specification D 1248 do not apply to theinsulation removed from the conductor.5.2 Insulation exposed to sunlight or weather requiresSpecification D 1248, Class C compound or suitable protectivecoverings. Class C compound shall meet the minimum absorp-tion coefficient requirement in Table 1.
11、5.3 Specimens removed from the wire or cable and tested at20 to 30C (68 to 80F) shall conform to the requirements forphysical properties specified in Table 1. The insulation may beair-oven aged without removal from the conductor.5.4 Thickness of InsulationThe minimum average insula-tion thickness sh
12、all be as specified in Table 2 or Table 3 of thisspecification. The minimum thickness shall be at least 90 % ofthe specified minimum average thickness.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility
13、 ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings and Coveringsfor Electrical and Telecommunication Wires and Cables.Current edition approved March 10, 2002. Published June 2002. Originallypublished as D 1351 54T. Last previous edition D 1351-97.2Annual Book of ASTM Standards, Vol
14、 08.01.3Annual Book of ASTM Standards, Vol 10.01.4Annual Book of ASTM Standards, Vol 10.02.5Available from the Insulated Cable Engineers Association, P.O. Box 440, SouthYarmouth, MA 02664.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
15、es.5.5 Absorption CoeffcientTest according to Test MethodD 3349. A certification by the manufacturer of the polyethylenecompound that the requirement has been complied with maysuffice.6. Electrical Requirements6.1 Order of TestingPerform the partial discharge, acvoltage, insulation resistance, and d
16、c voltage tests in that orderwhen any of these tests are specified. The sequence of othertesting is not specified.6.2 Partial DischargeWhen tested in accordance withICEA T-24-380, as modified in Test Methods D 2633, eachlength of completed shielded power cable rated for service at2001 V and above sh
17、all comply with the minimum partialdischarge extinction level. See Test Methods D 2633.6.3 AC Voltage TestThe insulated conductor shall with-stand the ac voltage specified in Table 2 or Table 3 for 5 min.Unless otherwise specified, this test may be omitted fornonshielded conductors rated up to 5000
18、V if the dc voltagetest described in 6.6 is to be performed.6.4 Insulation ResistanceThe insulated conductor shallhave an insulation-resistance value equal to or greater than thatcorresponding to a constant of 50 000 MV-1000 ft at 60F(15.6C). When the temperature of the water in which theinsulation
19、is tested differs from 60F, a correction factor mustbe applied. Table 1 of Test Methods D 2633 contains thecorrection factors. Each insulation manufacturer can furnishthe 1F coefficient for their insulation material by using theprocedure given in Test Methods D 2633. Multiply the mea-sured value by
20、the correction factor to obtain the insulationresistance value corrected to 60F.6.5 DC Voltage Test (Cables Rated at 5001 V and Above)Upon completion of the insulation resistance test, each lengthof insulated power cable rated for service at 5001 V and overshall withstand for 15 min the dc test volt
21、age given in Table 2or Table 3.6.6 DC Voltage Test (Cables Rated at 5000 V or Less)Upon completion of the insulation resistance test, each non-shielded conductor rated up to 5000 V shall withstand for 5min the dc test voltage given in Table 2 or Table 3. Unlessotherwise specified, this test may be o
22、mitted for nonshieldedconductors rated up to 5000 V if the ac voltage test describedin 6.3 has been performed.7. Keywords7.1 cable; conductor; electrical; insulation; polyethylene;thermoplastic; wireTABLE 1 Physical Properties of CompoundUnaged Requirements:Tensile strength, min, psi (MPa) 1400 (9.7
23、)Elongation at rupture, min, % 350Aged Requirements:After air oven aging at 100 6 1C for 48 h:Tensile strength, % retention, min 75Elongation at rupture, % retention, min 75Absorption Coefficient, min, absorbance/mm 320D1351022TABLE 2 Conductor Sizes, Insulation Thicknesses, and Test Voltages for Po
24、lyethylene-Insulated Power CablesANOTE 1Column A thicknesses (0 to 2000 V) are applicable to single-conductor power cables for general application when a black pigmentedinsulation is used without a further covering.NOTE 2Column B thicknesses (0 to 2000 V) are applicable to multiple-conductor cables
25、with an outer covering and to single-conductor cables withan outer covering.NOTE 3To limit the maximum voltage stress on the insulation at the conductor to a safe value, the minimum size of the conductor shall be inaccordance with Table 2.For cables or conditions of service where mechanical stresses
26、 govern, such as in submarine cables or long vertical risers, these minimum conductorsizes may not be strong enough.NOTE 4Polyethylene insulation used on nonshielded cable without an outer covering shall be black pigmented insulation meeting the requirementsfor both polyethylene insulation and polye
27、thylene jacket.NOTE 5Polyethylene insulation used on nonshielded cable without an outer covering for rated circuit voltages of 2001 to 5000 V shall be ozone anddischarge resistant when tested in accordance with Specification D 2308.NOTE 6Carbon-black-pigmented polyethylene insulation shall not be us
28、ed on power cable rated over 5000 V.Rated CircuitVoltage, Phase toPhase, VBConductor Size, Awgor kcmil (mm2)Insulation Thickness for 100 and 133Percent Insulation Levels,CGroundedand Ungrounded Neutrala-c Test Voltage,kV, for 100 and133 Percent InsulationLevels,CGrounded andUngrounded Neutrald-c Tes
29、t Voltage, kV,for 100 and 133 Per-cent Insulation Levels,CGrounded and Un-grounded NeutralColumn A Column BABABmils mm mils mm0 to 600 14 to 9 (2.08 to 6.63) 45 1.14 30 0.76 4.0 3.5 12.0 10.58 to 2 (8.37 to 33.62) 60 1.52 45 1.14 5.5 5.5 16.5 16.51 to 4/0 (42.41 to 107.2) 80 2.03 55 1.40 7.0 7.0 21.
30、0 21.0225 to 500 (114 to 253) 95 2.41 65 1.65 8.0 8.0 24.0 24.0525 to 1000 (266 to 507) 110 2.79 80 2.03 10.0 10.0 30.0 30.0601 to 2000 14 to 9 (2.08 to 6.63) 60 1.52 45 1.14 5.5 5.5 16.5 16.58 to 2 (8.37 to 33.62) 70 1.78 55 1.40 7.0 7.0 21.0 21.01 to 4/0 (42.41 to 107.2) 90 2.29 65 1.65 8.0 8.0 24
31、.0 24.0225 to 500 (140 to 253) 105 2.67 75 1.90 9.5 9.5 28.5 28.5525 to 1000 (266 to 507) 120 3.05 90 2.29 11.5 11.5 34.5 34.5100 Percent Insula-tion Level,DGroundedNeutral133 Percent Insula-tion Level,UngroundedNeutral100 PercentInsulationLevel,DGroundedNeutral133 PercentInsulationLevel, Un-grounde
32、dNeutral100 PercentInsulationLevel,GroundedNeutral133 PercentInsulationLevel, Un-groundedNeutralNONSHIELDEDE2001 to 5000 8 to 4/0 (8.37 to 107.2)225 to 500 (114 to 253)525 to 1000 (266 to 507)1101201302.793.053.301101201302.793.053.30131313131313353535353535Rated CircuitVoltage, Phase toPhase, VBCon
33、ductor Size, Awgor kcmil (mm2)100 PercentInsulation Level,DGrounded Neutral133 PercentInsulation Level,UngroundedNeutral100 PercentInsulationLevel,DGroundedNeutral133 PercentInsulationLevel, Un-groundedNeutral100 PercentInsulationLevel,GroundedNeutral133 PercentInsulationLevel, Un-GroundedNeutralSHI
34、ELDED2001 to 5000 8 to 1000 (8.37 to 507) 90 2.29 90 2.29 13 13 35 355001 to 8000 6 to 1000 (13.30 to 507) 115 2.92 140 3.56 18 22 45 458001 to 15000 2 to 1000 (33.62 to 507)F175 4.45 215 5.46 27 33 70 8015001 to 25000 1 to 1000 (42.41 to 507) 260 6.60 345 8.76 38 49 100 12525001 to 28000 1 to 1000
35、(42.41 to 507) 280 7.11 42 10528001 to 35000 1/0 to 1000 (53.49 to 507) 345 8.76 49 125AFor series lighting cables, see Table 3.BThe actual operating voltage shall not exceed the rated circuit voltage by more than (1) 5 percent during continuous operation or (2) 10 percent during emergencieslasting
36、not more than 15 min.CThe selection of the cable insulation level to be used in a particular installation shall be made on the basis of the applicable phase to phase voltage and the generalsystem category as outlined below:100 Percent LevelCables in this category may be applied where the system is p
37、rovided with relay protection such that ground faults will be cleared as rapidly aspossible, but in any case within 1 min. While these cables are applicable to the great majority of cable installations which are on grounded systems, they may be usedalso on other systems for which the application of
38、cables is acceptable provided the above clearing requirements are met in completely de-energizing the faulted section.In common with other electrical equipment, the use of cables is not recommended on systems where the ratio of the zero to positive phase reactance of the system atthe point of cable
39、application lies between 1 and 40 since excessively high voltages may be encountered in the case of ground faults.133 Percent LevelThis insulation level corresponds to that formerly designated for ungrounded systems. Cables in this category may be applied in situations wherethe clearing time require
40、ments of the 100 percent level category cannot be met, and yet there is adequate assurance that the faulted section will be de-energized in a timenot exceeding 1 h. They may also be used when additional insulation strength over the 100 percent level category is desirable.DWhere additional insulation
41、 thickness is desired, it shall be the same as for the 133 percent insulation level.EWhere cable is provided with a protective covering, these insulation thicknesses shall be 90 mils (2.29 mm) for all conductor sizes listed.FFor 133 percent insulation level (ungrounded neutral), the minimum conducto
42、r size is 1 Awg (42.41 mm2).D1351023ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the ris
43、kof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of thi
44、s standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake
45、your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by
46、contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 3 Conductor Sizes, Insulation Thicknesses and Test Voltages for Polyethylene-Insulated Series Lighting CablesCircuit Voltage, VA,BConductor
47、 Size, Awg (mm2)Insulation ThicknessBtest Voltage, kVmils mm a-c d-c0 to 1000 10 to 8 (5.26 to 8.37)6 to 4 (13.30 to 21.15)45551.141.405.57.016.521.01001 to 2000 10 to 8 (5.26 to 8.37)6 to 4 (13.30 to 21.15)55651.401.657.08.021.024.02001 to 3000 10 to 8 (5.26 to 8.37)6 to 4 (13.30 to 21.15)75901.902
48、.29101030303001 to 6000 8 to 4 (8.37 to 21.15) 110 2.79 13 356001 to 9000 8 to 4 (8.37 to 21.15) 150 3.81 19 55The following tabulation of series lighting transformer ratings is representative of those in common use:Rating, kW6,6-A Secondary 20-A SecondaryFull-load Voltage, V,with ProtectorsOpen-cir
49、cuit Voltage, V,Without ProtectorsFull-load Voltage, V,with ProtectorsOpen-circuit Voltage,V, Without Protectors10 1515 2090 500 69015 2272 3090 750 102020 3030 4115 1000 136025 3787 5110 1250 168530 4545 6130 1500 202040 6060 8180 2000 2700AA separate jacket is not required. If protectors are employed, the thickness shall be determined by the full-load voltage. If the circuit is to be operated without protectors,the thickness shall be determined by the open-circuit voltage.BThe highest circuit voltage at each step represents the maximum operating volta
