1、 IEC TR 60865-2 Edition 2.0 2015-04 TECHNICA L REPOR T Short-circuit currents Calculation of effects Part 2:Examples of calculation IEC TR 60865-2:2015-04(en)THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no par t of this
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10、e us y our feedback on this publication or need further assistance,please contact the Customer Serv ice Centre:csciec.ch.IEC TR 60865-2 Edit ion 2.0 2015-04 TECHNICA L R EPOR T Short-circuit currents Calculation of effects Part 2:Examples of calculation INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS
11、17.220.01;29.240.20 ISBN 978-2-8322-2551-6 Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TR 60865-2:2015 IEC 2015 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Symbols and units.7 4 Example 1 Mechanical effects on a 10 kV arrangement with single
12、 rigid conductors.8 4.1 General.8 4.2 Data.9 4.3 Normal load case:Conductor stress and forces on the supports caused by dead load.9 4.4 Exceptional load case:Effects of short-circuit currents.10 4.4.1 Maximum force on the central main conductor.10 4.4.2 Conductor stress and forces on the supports.11
13、 4.5 Conclusions.13 5 Example 2 Mechanical effects on a 10 kV arrangement with multiple rigid conductors.14 5.1 General.14 5.2 Data(additional to the data of Example 1).14 5.3 Normal load case:Conductor stress and forces on the supports caused by dead load.15 5.4 Exceptional load case:Effects of sho
14、rt-circuit currents.15 5.4.1 Maximum forces on the conductors.15 5.4.2 Conductor stress and forces on the supports.16 5.5 Conclusions.20 6 Example 3.Mechanical effects on a high-voltage arrangement with rigid conductors.20 6.1 General.20 6.2 Data.21 6.3 Normal load case:Conductor stress and forces o
15、n the supports caused by dead load.22 6.4 Exceptional load case:Effects of short-circuit currents.23 6.4.1 Maximum force on the central main conductor.23 6.4.2 Conductor stress and forces on the supports.23 6.4.3 Conclusions.29 7 Example 4.Mechanical effects on a 110 kV arrangement with slack conduc
16、tors.30 7.1 General.30 7.2 Data.31 7.3 Electromagnetic load and characteristic parameters.32 7.4 Tensile force Ft,d during short-circuit caused by swing out.34 7.5 Dynamic conductor sag at midspan.35 7.6 Tensile force Ff,d after short-circuit caused by drop.36 7.7 Horizontal span displacement bh and minimum air clearance amin.36 7.8 Conclusions.36 8 Example 5.Mechanical effects on strained conductors.37 8.1 General.37 8.2 Common data.37 8.3 Centre-line distance between sub-conductors as=0,1 m.38
