1、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM m 3404583 0082839 987 m EN 60719 August 1993 CDC 621.315.2.001.24 : 621.315.61 : 621.3.022 Descriptors: Electric cable, low voltage equipment, flexible cable, flexible conductor, dimension measure, minimum value, maximum value, calculation English ve
2、rsion Calculation of the lower and upper limits for the average outer dimensions of cables with circular copper conductors and of rated voltages up to and including 4501750 V (IEC 719 : 1992) Calcul des valeurs minimales et maximales des dimensions extrieures moyennes des conducteurs et cbles mes ci
3、rculaires en cuivre et de tension nominale au plus gale 4501750 V (CE1 719 : 1992) Berechnung der unteren und oberen Grenzen der mittleren AuBenmaBe von Leitungen mit runden Kupferleitern und Nennspannungen bis 4501750 V (IEC 719 : 1992) This European Standard was approved by CENELEC on 1993-07-06.
4、CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained o
5、n application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Se
6、cretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENE
7、LEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels O 1993 Copyright reserved to CENELEC members Ref. No. EN 60719 : 1993 E Page 2 EN 6071
8、9 : 1993 3404583 0082840 bT9 Foreword At the request of the CENELEC Rchnical Committee Tc 20, Electric cables, the International Standard IEC 719 : 1992 was submitted to the CENELEC Cnique Acceptance Procedure (UAP) in September 1992 for acceptance as a European Standard. The text of the internation
9、al standard was approved by CENELEC as EN 60719 on 6 July 1993. The following dates were fixed: - latest date of publication of an identical national standard (dop) 1994-03-01 - latest date of withdrawal of conflicting national standards (dow) 1994-03-01 Annexes designated normative are part of the
10、body of the standard. In this standard, annex ZA is normative. 3404583 0082843 535 9 Page 3 EN 60719 : 1993 CALCULATION OF THE LOWER AND UPPER LIMITS FOR THE AVERAGE OUTER DIMENSIONS OF CABLES WITH CIRCULAR COPPER CONDUCTORS AND OF RATED VOLTAGES UP TO AND INCLUDING 450/750 V 1 General 1.1 Scope Thi
11、s International Standard specifies a method for calculation of the lower and upper limits for the average outer diameter of cables and the outer dimensions of flat cords with circular copper conductors and of rated voltages up to and including 4501750 V. This standard is not applicable to mineral in
12、sulated cables. The method shall not be used to calculate the diameter over the core assembly for determining the sheath thickness; the method given in Appendix A of IEC 502 shall be used for this purpose. NOTES 1 as a basis for calculation and are not intended for verification by measurement. It is
13、 stressed that the conductor diameters given in the tables are intended only for use in this standard 2 The factors given in 2.5 and 3.1 of this standard may be varied in preparing standards for cables in which the number of cores, the hardness of the insulation, precise positioning of the conductor
14、s or other factors may affect the dimensional tolerances permissible. 1.2 Normative references The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid
15、. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possi- bility of applying the most recent edition of the normative document listed below. Members of IEC and IS0 maintain registers of currently valid I
16、nternational Standards. IEC 502: 1983, Extruded solid dielectric insulated power cables for rated voltages from 1 kV up to 30 kV. 2 Lower limit for the average outer diameter 2.1 cables for fixed wiring and for flexible cables and cords. Take as diameter D of the conductor the value given in table 1
17、 or 2 respectively for 2.2 Calculate the nominal diameter over the core by adding to the appropriate value of the conductor diameter, obtained as in 2.1, twice the specified mean value of the thick- ness of the insulation and of any other mandatory coverings of the individual core. 3404583 0082842 4
18、71 Page 4 EN 60719 : 1993 2.3 Calculate the nominal diameter over the core assembly by multiplying the value obtained in 2.2 by the appropriate value of the assembly coefficient k, given in the following table: Number of cores 2 3 4 5 6 7 8 8 9 9 10 lo 11 12 12 13 14 15 16 17 18 18 19 20 21 22 23 r
19、Assembly coefficient k 2.00 2,16 2,42 2.70 3.00 3,O 3,35 3.45 3,66 3,80 4.00 4.00 4.40 4.00 4.16 5.00 4,41 4,41 4,70 4.70 5,OO 5.00 7.00 5,OO 5,33 5.33 5,67 5,67 Number of cores 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 52 61 Assembly coefficient k 6,00 6,00 6,W 6,15
20、 6,41 6,41 6,41 6,70 6,70 6,70 7.00 7.00 7m 7,W 733 7.33 733 7,67 7,67 7,67 893 8,3 8.00 8,W 8,15 8,41 9,00 Cores assembled in one layer. 2.4 Calculate the nominal outer diameter Do of the finished cable by adding to the value obtained in 2.3 twice the specified mean value of the thickness of the sh
21、eath (or sheaths) and of the other mandatory coverings, if any, over the core assembly (see clause 4). 2.5 the factor given: The lower limit D, of the average outer diameter is obtained by multiplying Do by class 5 or class 6 conductors for all other constructions Dmin = 0,96 Do mrn for circular mul
22、ti-core cables with Dmin = 0,96 Do - 0,3 mm In each case, the value so obtained shall be rounded off: - - to the nearest first decimal for values less than 50 mm; to the nearest unit for values equal to or exceeding 50 mm. W 3404583 0082843 308 m Page 5 EN 60719 : 1993 If the last figure to be retai
23、ned is followed, before rounding, by O, 1, 2, 3 or 4, it shall remain unchanged (rounding down). If the last figure to be retained is followed, before rounding, by 9, 8, 7, 6 or 5, it shall be increased by one (rounding up). Examples : calculated value = 2,449 Dmin = 2,4 calculated value = 2,494 Dmi
24、n = 2,5 calculated value = 50,27 calculated value = 50,61 Dmin = 50 Dmin = 51 3 Upper limit for the average outer diameter 3.1 places using the nominal outer diameter Do obtained in 2.4 as follows: The upper limit D, of the average outer diameter is calculated to two decimal for rubber cables, O, =
25、Do x 1,2 mm for PVC cables, Oma, = Do x 1,16 mm Dmax is rounded off in the same way as Dmin (see 2.5). 4 Thickness of the mandatory coverings other than the insulation and the sheath(s) The following values shall be used unless otherwise specified in the cable standard: Film separator between conduc
26、tor and insulation Proofed textile type, textile braid round each core Film separator over laid up cores Proofed textile tape separator over laid up cores Separator between two layers of a sheath Outer textile braid Metal braid Longitudinally applied metal tape with overlap in combination with drain
27、 wires 0,08 mm 0,15 mm 0,15 mm 0,151 mm 0,15 mm 0,30 mm 2,5 times diameter of the component wire in millimetres 1.5 times thickness of the component tape in millimetres 3404583 0082844 Z44 Page 6 EN 60719 : 1993 Table 1 - Diameter of circular copper conductors for cables for fixed wiring Nominal cro
28、ss- sectional area m m2 03 0,75 1 23 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800 1 O00 13 Class 1 Nominal diameter of :onductor I for calculation mm 0,80 0,95 1,lO 1.35 1,75 22 2-7 3,5 4.4 56 6,s 7.6 9.1 10,7 12,o 13.4 Class 2 Nominal diameter of conductor I for calculatior mm 0.85
29、1 ,O5 1,20 1,45 1 ,85 2,35 3,8 4,7 6,0 7.0 8.2 9,8 11,5 13,0 14,4 16,1 18,5 20.7 23,4 26.2 29,8 37,Q 2,9 33,a )see note in 1.1. 3404583 0082845 $80 Page 7 EN 60719 : 1993 Table 2 -Diameter of circular copper conductors for flexible cables and cords Nominal cross- sectional area m m2 03 0,75 1 13 2.5
30、 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 Classes 5 and 6 Nominal diameter of conductor) for calculation mm 0,95 1.10 1.25 1.50 1,95 2.50 3,o 3.9 5.0 6.4 7.7 11.0 12,5 14,2 15.8 173 20,l 223 25.8 29,O 337 9.2 ) See note i in i. i. M 3404583 O082846 017 H Page 8 EN 60719 : 1993 Annex
31、ZA (normative) Other international publicatSons quoted in this standard with the references of the relevant European publications When the international publication inas been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies. IEC publication 502 Date Title EN/HD 1983 Extrudcd solid dielectric insulated power - cablesjw rated voltages frmn 1 kVup to 30 kV Date -
