This document, which is a Technical Report, provides information with regard to conductors specified in IEC 61089 and other aluminium and aluminium steel conductors. Such information includes properties of conductors and useful methods of calculation. The following chapters are included in this document.<\/p>\n
current carrying capacity of conductors: Calculation method and typical example<\/p>\n<\/li>\n
alternating current resistance, inductive and capacitive reactances<\/p>\n<\/li>\n
elongation of conductors: Thermal and stress-strain data<\/p>\n<\/li>\n
conductor creep<\/p>\n<\/li>\n
loss of strength of aluminium wires due to high temperatures<\/p>\n<\/li>\n<\/ul>\n
It is noted that this document does not discuss all theories and available methods for calculating conductor properties, but provides users with simple methods that provide acceptable accuracies.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 4 Symbols, units and abbreviated terms 4.1 Symbols and units <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.2 Abbreviated terms 5 Current carrying capacity 5.1 General 5.2 Heat balance equation <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5.3 Calculation method 5.4 Joule effect 5.5 Solar heat gain 5.6 Radiated heat loss <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.7 Convection heat loss 5.8 Method to calculate current carrying capacity (CCC) 5.9 Determination of the maximum permissible aluminium temperature <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.10 Calculated values of current carrying capacity 6 Alternating current resistance, Inductive and capacitive reactances 6.1 General 6.2 Alternating current (AC) resistance <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 6.3 Inductive reactance <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Tables Table 1 \u2013 Values of Kg for inductive reactance calculations <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.4 Capacitive reactance 7 Elongation of stranded conductors 7.1 General <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 7.2 Thermal elongation <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Table 2 \u2013 Coefficient of linear expansion \u03b2 of inhomogeneous conductors designated Ax\/Sxy <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 7.3 Stress-strain properties Table 3 \u2013 Coefficient of linear expansion \u03b2 of inhomogeneous conductors designated Ax\/20SA <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7.4 Assessment of final elastic modulus <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Table 4 \u2013 Typical stress-strain data of stranded conductors based on published test results <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 8 Conductor creep 8.1 General Table 5 \u2013 Final modulus of elasticity calculated with Ea= 55 000 MPa and Es= 190 000 MPa Table 6 \u2013 Final modulus of elasticity calculated with Ea= 55 000 MPa and Es= 159 000 MPa (20SA) <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 8.2 Creep of single wires Figures Figure 1 \u2013 Typical creep curve <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 8.3 Total conductor creep 8.4 Prediction of conductor creep 8.5 Creep values <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 9 Loss of strength Table 7 \u2013 Indicative creep values of stranded conductors(25 % RTS, 20 \u2103) <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure 2 \u2013 Loss of strength of aluminium A1 as a function of temperature Figure 3 \u2013 Loss of strength of aluminium A2 <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (informative)A practical example of CCC calculation A.1 Basic Assumptions A.2 CCC calculation <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Annex B (informative)Indicative conditions for CCC calculation Table B.1 \u2013 Indicative conditions for CCC calculation <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Overhead electrical conductors. Calculation methods for stranded bare conductors<\/b><\/p>\n |