1、GeneralSpecificationElectrical Function GME14023Screened and Unscreened Multi-Core Sheathed CablesNote: This standard may be applied only for current projects incl. Global Epsilon (37#). It isSuperceded for all future projects and replaced by GMW15839.1 IntroductionNote: Nothinginthisstandardsuperse
2、desapplicablelaws and regulations.Note: In the event of a conflict between the Eng-lish and the domesticlanguage, the English languageshall take precedence.1.1 Scope. This standard is based on ISO 14572, towhich additions have been made in several sections.1.2 Mission / Theme. This standard specifie
3、sdimensions, test methods and requirements forround, sheathed multi-core cables, both screenedand unscreened. The purpose of the cables is tosupply current to power consuming components.1.3 Classification. The inner cores shall fulfill therequirement according to GME14022. Thecablesareclassified by
4、the nominal voltage of the system wherethe cables are used, by wall dimension of the cableinsulation and by the operating temperature.1.3.1 Nominal Voltage System. This standardspecifies dimensions, test methods and requirementsfor following multi-core cables:60 V cables intended for use in road veh
5、icleapplications where the nominal system voltage is60 V DC to protect themfor mechanical stress to avoid shock hazards. Cablesheath for 600 V cables shall be visual identified withpermanent orange colour.1.3.2 Temperature Classes. Eight cable classeshave been defined in Table 1 to respond to thevar
6、ious temperatures encountered on vehicles.Thetemperatureclassratingisestablishedbytherateof the cores and the sheath. The rating of the cableshall be equal to the lowest rating of the individualcores and sheath.Note: Nothinginthisstandardsupersedesapplicablelaws and regulations.Table 1: Temperature
7、ClassesClassOperatingtemperaturein CLong-term ageingtemperature in C3000 hShort-term ageingtemperature in C240hThermal overloadtemperature in C6hA -40.+85 +852 +1102 +1352B -40.+100 +100 3 +1253 +1503C -40.+125 +125 3 +1503 +1753D -40.+150 +150 3 +1753 +2003E -40.+175 +175 3 +2003 +2254F -40.+200 +2
8、00 3 +2254 +2504G -40.+225 +225 4 +2504 +2754H -40.+250 +250 4 +2754 +3004 Copyright 2008 General Motors Corporation All Rights ReservedPublication Department: GME Specification CenterSeptember 2008 - Issue No. 2 Page 1 of 13PRD045 - VPRE ST 1 10/03 GME14023 GM EUROPE ENGINEERING STANDARDS2 Referenc
9、esNote: Only the latest approved standards are appli-cable unless otherwise specified.2.1 External Standards/Specifications.EN 590ISO 1183-1ISO 1183-2ISO 1183-3ISO 1817ISO 145722.2 GM Group Standards/Specifications.B 040 0070B 040 1073B 040 0900B 040 1065B 440 1004GME8740GME14022GME14090GME L0003GMW
10、3059ON 2022.3 Additional References. None.3 Test Preparation and Evaluation3.1 Resources.3.1.1 Calibration. The test facilities and equipmentshall be in good working order and shall have a validcalibration label.3.1.2 Alternatives. Alternative test facilities andequipment may also be used. However,
11、all mea-suring variables as specified in this standard shallbe determined correctly with respect to its physicaldefinition.3.1.3 Facilities.3.1.3.1 Ovens. When an oven is required, unlessotherwise specified it shall be a hot air oven. The aircon-tained in the oven shall be completely changeda minimu
12、m of eight times and a maximum of twentytimes per hour at the specified temperature.3.1.4 Equipment. As specified in each test.3.2 Test Samples. Number of test samples isspecified in each section. The cables shall be man-ufactured under full production conditions. No partsout of prototype tools shal
13、l be used.For cables of identical compound: Unless otherwisespecified, multicore/screened wires of 0.35 mm2,0.75 mm2 and 2.5 mm2 shall be tested.3.3 Conditioning. Test samples for all tests shall bepreconditioned for at least 16 h at a temperature of(+23 5) C (room temperature) anda relativehumid-it
14、y of (45.75) %. Unless otherwisespecified, alltestsotherthan “inprocess” testsshallbeconductedatthistemperature.3.4 Documentation. Samples of components ormaterial released to this standard shall be tested forconformity with the requirements of this standard andapproved by the responsible GM Departm
15、ent prior tothe start of delivery of production level componentsor materials.Anychangetothe componentor materiale.g. design,function, properties, manufacturing process and/orlocation of manufacture requires a new releaseof the product. It is the sole responsibility of thesupplier to provide the cust
16、omer, unsolicited, withdocumentation of any change or modification to theproduct/process, and to apply for a new release.If not otherwise agreed to the entire verification testshall be repeated and documented by the supplierprior to start of delivery of the modified or changedproduct. In some cases
17、a shorter test can be agreedto between the responsible GM Department and thesupplier.3.4.1 TestResults. Thetestresultsshallbereportedina test report (see GME14022). The test report shallinclude as minimum:Name of the supplierDateDesignation of productIMDS-ID and information, if the IMDS datasheethas
18、 been approved by the customerReference to used test methodTest results and interpretation of results3.4.2 Deviations from Test Procedure. Deviationsfrom the requirements of the test procedures shallhave been agreed upon. Such requirements shallbespecifiedoncomponentdrawings, test certificates,repor
19、ts etc.4 Requirements and ProcedureNote: Where no tolerance is specified, all valuesshall be considered to be approximate.4.1 Material.4.1.1 Conductor. See GME14022. Copyright 2008 General Motors Corporation All Rights ReservedPage 2 of 13 Issue No. 2 - September 2008PRD045 - VPRE ST G 10/03 GM EURO
20、PE ENGINEERING STANDARDS GME140234.1.2 Insulation. Allsingle-cores shallpass the testsas defined in GME14022.4.1.3 Material of the Sheath. The sheath shall besmooth andfreefrom cracks,pitting andother defectsvisible to the naked eye. Table 2 defines the materialcodes for the sheath material.Table 2:
21、 Sheath MaterialCode Material Temperature class1 PVC B2 XLPE C3 XLPE D4 ETFE E5 SIR F6 FEP F7 Other materials8 TPE (PUR) C9 PET D4.1.4 Screen. Screening of cable may be done byusing aluminum foil with drain wire, spiral screen orbraid of copper strands. Any foil used for screen shallbe overlapped by
22、 5 % min.4.1.5 Drain Wire. See GME14022 for drain wiresizes and properties.4.1.6 Identification. As part of the work of typetesting, material identification shall be performedby means of determination of various chemicaland physical properties and characteristics in orderto determine the properties
23、and characteristics oftype-tested electrical conductors.This is done in order to obtain reference values thatwould be needed in the event of any claims. Depar-tures from these reference values exceeding normaltolerances shall initiate more extensive inspection inaccordance with this standard.4.1.6.1
24、 IR-spectrum. This method is used for identi-fication of organic compounds and takes place on thebasis of the position and intensity through molecularmovement provoked absorption.The analysis of the insulation shall be performedin delivery condition, and after short-term ageing(240 h).Note: Dependin
25、g on colour batch, small changesand/or deviations are permitted.4.2 Marking. The usage of the marking shall beestablished by agreement between customer andsupplier.Colour-andlasermarkingarepermitted. Whenmark-ing stamped into the insulating material, the raisedstamping shall be 0.020 mm and the embe
26、ddedstamping 0.010 mm.Finalinspectionandapprovalaregivenbytherespon-sible GM department, concerning readability, durabil-ity and sealing effect to single-wire sealings.If not otherwise specified, cables shall be perma-nently marked according to GME14090. In additionthe suppliers type designation sha
27、ll be added. Thismarking shall be repeated at intervals not exceeding200 mm max. along the connector.4.3 Colours. Colours of insulation shall agree rea-sonably closely with the specified colours as shownin GME8740.4.3.1 Dual-colour Cables. Permitted combinationsof colours for single-cores can be fou
28、nd in GME8740.Colour coding of cores (painting of neutral cores indifferent colours) shall not be employed.4.4 Dimensions.4.4.1 Cable Outside Diameter.4.4.1.1 Test Samples. See GME14022.4.4.1.2 Apparatus. See GME14022.4.4.1.3 Procedure. See GME14022.4.4.1.4 Interpretation of Results. No single value
29、shall exceed the value given in Table Appendix A.4.4.2 Ovality. The ovality shall be calculated as fol-lows:x 1004.4.2.1 Interpretation of Results. Ovality shall bewithin the limits specified between customer and sup-plier.4.4.3 Thickness of the Sheath.4.4.3.1 Preparation of the Test Sample. SeeGME1
30、4022, “Insulation Thickness”.4.4.3.2 Apparatus. See GME14022, “InsulationThickness”.4.4.3.3 Measurement Procedure. See GME14022,“Insulation Thickness”. Copyright 2008 General Motors Corporation All Rights ReservedSeptember 2008 - Issue No. 2 Page 3 of 13PRD045 - VPRE ST U 10/03 GME14023 GM EUROPE EN
31、GINEERING STANDARDS4.4.3.4 Interpretation of Results. Nominal valuesof thickness of cable sheath are given in Appendix A.Calculate the minimum value with formula:Min. value = 0.9 x nom. value 0.1 mm.4.4.4 Drain Wire Diameter. See GME14022, “Con-ductor Diameter” and “Strand Diameter”, for measur-ing
32、of outer diameter and single strand diameter.4.4.4.1 Interpretation of Results. No single valueshall exceed the requirements in Appendix A.4.4.5 Type of Screen. Type of screen (braided,helicoidal (spiral), taped or a combination of differenttypes) is given in Appendix A.4.4.5.1 Interpretation of Res
33、ults. If no additionalrequirements are given in Appendix A, the surfacecovering shall be 85 % min. for spiral or braidedscreen. Overlapping of metallized foils shall be5 % min.4.5 Electrical Characteristic.4.5.1 Continuity.4.5.1.1 Test Samples. See ISO 14572.4.5.1.2 Apparatus. See ISO 14572.4.5.1.3
34、Procedure. See ISO 14572.4.5.1.4 Interpretation of Results. The indicatorshall show continuity for each single core and screenif present.4.5.2 Withstand Voltage.4.5.2.1 Test Samples. Prepare a test sample of3.5 m. Remove 100 mm of the sheath from one endof the cable and remove 25 mm of insulation fr
35、omeach inner conductor.4.5.2.2 Apparatus. Use a 50 Hz or a 60 Hz sourcecapable of applying 2 kV AC for 3 s min.4.5.2.3 Procedure. Apply 2 kV AC between a coreand the remaining core(s) for 60 s min. Repeat theprocedure until allcores have beentested. Ifascreenis present, it shall be tested as one of
36、the cores.4.5.2.4 Interpretation of Results. Breakdown shallnot occur between cores. If a screen is present,breakdown shall not occur between the core(s) andscreen.4.5.3 Measurement of Conductor Resistance.Conductor resistance of single cores and drain wireshall be tested according to GME14022, “Con
37、ductorResistance”, after dismantling the cable. Repeat themeasuring for each core and drain wire if present.See GME14022, “Conductor Resistance”.4.5.3.1 Test Samples. See GME14022,“Conductor Resistance”.4.5.3.2 Apparatus. See GME14022,“Conductor Resistance”.4.5.3.3 Procedure. See GME14022,“Conductor
38、 Resistance”.4.5.3.4 Interpretation of Results. Conductorresistance shall comply with the values given inGME14022.4.5.4 Screening Effectiveness. These tests areonly used for screened cables.4.5.4.1 DC Resistance of the Screen.4.5.4.1.1 Test Samples. See ISO 14572.4.5.4.1.2 Apparatus. See ISO 14572.4
39、.5.4.1.3 Procedure. See ISO 14572.4.5.4.1.4 Interpretation of Results. The value shallbewithinthelimitsestablishedbetweencustomerandsupplier.4.5.4.2 Line Injection Method.4.5.4.2.1 Test Samples. According to ISO 14572.4.5.4.2.2 Apparatus. According to ISO 14572.4.5.4.2.3 Procedure. According to ISO
40、14572.4.5.4.2.4 Interpretation of Results. The require-ments for surface transfer impedance shall be estab-lished by agreement between customer and supplier.4.5.4.3 Tri-axial Method.4.5.4.3.1 Test Samples. According to ISO 14572.4.5.4.3.2 Apparatus. According to ISO 14572.4.5.4.3.3 Procedure. Accord
41、ing to ISO 14572.4.5.4.3.4 Interpretation of Results. The require-ments for surface transfer impedance shall be estab-lished by agreement between customer and supplier.4.5.4.4 Absorbing Clamp Method.4.5.4.4.1 Test Samples. According to ISO 14572.4.5.4.4.2 Apparatus. According to ISO 14572.4.5.4.4.3
42、Procedure. According to ISO 14572.4.5.4.4.4 Interpretation of Results. The require-ment for screening attenuation shall be establishedby agreement between customer and supplier.4.6 Mechanical Characteristic.4.6.1 Pressure Test at High Temperature.4.6.1.1 Test Samples. Prepare three test samples,each
43、 of 600 mm length. Copyright 2008 General Motors Corporation All Rights ReservedPage 4 of 13 Issue No. 2 - September 2008PRD045 - VPRE ST G 10/03 GM EUROPE ENGINEERING STANDARDS GME140234.6.1.2 Apparatus. According to GME14022. Applya force F by the blade, to the test samples as givenby the formula:
44、D = the maximum value of the outside cable diameterexpressed in mmi = the minimum value of the sheath thicknessexpressed in mmThe coefficient 0.8 carries the unit N/mm.The calculated force may be rounded off at the lowerdigit, but not beyond 3 %.4.6.1.3 Procedure. Place thetestsamplesas shownin Figu
45、re 1. Attach the test samples to support, sothat they donot bend under the pressure of the blade.The load and the blade of the apparatus shall be per-pendicular to the test samples axis.Place the samples under load, not preheated, for 4 hin an oven at the temperature specified in Table 1,long term a
46、geing.Coolthe test sampleswithin10s byimmersionincoldwater.Measure the thickness of the sheath immediately, atthe point of impression and at points 10 mm to bothsides of the impression, by means of a measuringdevice that doesnt cause any deformation.4.6.1.4 Interpretation of Results. The thicknesswi
47、thin the area of expression shall not be 60 % ofthe mean of the other values, see Table 3.Figure 1: Pressure Test Setup1 Test frame2 Test sample3 Support4.6.2 Cyclic Bending Test.4.6.2.1 Test Samples. See ISO 14572.4.6.2.2 Apparatus. See ISO 14572.4.6.2.3 Procedure. See ISO 14572. Theradius shall be
48、 2.5 times the outer diameter ofthe cable. If a screen is present, perform the“withstand voltage test” according to GME14022.4.6.2.4 Interpretation of Results. The requirednumber of cycles x, shall be established betweencustomer and supplier. If a screen is present, break-down shall not occur between core(s) and screen.4.6.3 Abrasion Resistance.4.6.3.1 Test Samples. See GME14022.4.6.3.2 Apparatus. See GME14022. Copyright 2008 General Motors Corporation All Rights ReservedSeptember 2008 - Issue No. 2 Page 5 of 13PRD045 - VPRE ST U 10
