IEC-TR-60909-2-2008.pdf
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1、 IEC/TR 60909-2 Edition 2.0 2008-11 TECHNICAL REPORT Short-circuit currents in three-phase a.c. systems Part 2: Data of electrical equipment for short-circuit current calculations IEC/TR 60909-2:2008(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserv
2、ed. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If y
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8、tomer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC/TR 60909-2 Edition 2.0 2008-11 TECHNIC
9、AL REPORT Short-circuit currents in three-phase a.c. systems Part 2: Data of electrical equipment for short-circuit current calculations INTERNATIONAL ELECTROTECHNICAL COMMISSION X ICS 17.220.01; 29.240.20 PRICE CODE ISBN 2-8318-1016-1 Registered trademark of the International Electrotechnical Commi
10、ssion -,-,- 2 TR 60909-2 IEC:2008(E) CONTENTS FOREWORD.4 1 General 6 1.1 Scope and object.6 1.2 Normative references 6 2 Data for electrical equipment6 2.1 General.6 2.2 Data of typical synchronous machines.7 2.3 Data of typical two-winding, three-winding and auto-transformers10 2.4 Data of typical
11、overhead lines, single and double circuits 14 2.5 Data of typical high-voltage, medium-voltage and low-voltage cables20 2.6 Data of typical asynchronous motors.35 2.7 Busbars.38 Annex A (informative) Information from National Committees.42 Bibliography43 Figure 1 Subtransient reactance of synchronou
12、s machines 50 Hz and 60 Hz (Turbogenerators, salient pole generators, motors SM and condensers SC) .8 Figure 2 Rated Voltage rG U and rated power factor rG cos of synchronous machines (Turbo generators, salient pole generators, motors and condensers 50 Hz and 60 Hz) .9 Figure 3 Unsaturated and satur
13、ated synchronous reactance of two-pole turbo generators 50 Hz and 60 Hz (relative values)9 Figure 4 Three-winding transformer (No. 6 of Table 3).12 Figure 5 Rated short-circuit voltage ukr of unit transformers in power stations (ST) with or without on-load tap-changer 13 Figure 6 Rated short-circuit
14、 voltages ukr of network transformers 14 Figure 7 Positive-sequence reactance L ) 1( XX= of low-voltage and medium-voltage overhead lines 50 Hz, Cu or Al, with one circuit according to Equation (15) of IEC 60909-0 .16 Figure 8 Positive-sequence reactance L ) 1( XX= of overhead lines 50 Hz (60 Hz- va
15、lues converted to 50 Hz) .19 Figure 9 Type of overhead lines.20 Figure 10 Single-core cable 64 kV / 110 kV with lead sheath 4 23 Figure 11 Reduction factor depending on the inducing current for cables with one lead sheath and two overlapping steel tapes, f = 50 Hz 335 Figure 12 Reduction factor depe
16、nding on the inducing current for cables with three lead sheaths and two overlapping steel tapes, f = 50 Hz 335 Figure 13 Ratio rMLR II/ of low-voltage and medium-voltage asynchronous motors, 50 Hz and 60 Hz.37 Figure 14 Product rMrMx cos of low-voltage and medium-voltage motors, 50 Hz and 60 Hz.38
17、Figure 15 Geometric mean distance gL1L1 = gL2L2 = gL3L3 of the main conductors .39 Figure 16 Factor and for the calculation of ) 1( X given in Equation (34) .40 -,-,- TR 60909-2 IEC:2008(E) 3 Table 1 Actual data of typical synchronous generators, motors and condensers 7 Table 2 Actual data of typica
18、l two-winding transformers (NT: network; ST: power station) .10 Table 3 Actual data of typical three-winding transformers 11 Table 4 Actual data of typical autotransformers with and without tertiary winding.12 Table 5 Actual data of typical overhead lines 50 Hz and 60 Hz 18 Table 6 Actual data of ty
19、pical electric cables21 Table 7 Equations for the positive-sequence and the zero-sequence impedance of cables.22 Table 8 Single-core cables 64/110 kV, 2XK2Y, 3 1 240 . 1 200 rm, Cu with lead sheath 24 Table 9 10-kV-cables N2XS2Y.25 Table 10 20-kV-cables N2XS2Y.26 Table 11 Positive-sequence and zero-
20、sequence impedance of four low-voltage single-core cables NYY 4 1 qn. (Case No. 2a in Table 7) .27 Table 12 Low-voltage cable NYY .29 Table 13 Low-voltage cable NYY with three and a half copper conductors .30 Table 14 Low-voltage cable NYCWY with four copper conductors32 Table 15 Low-voltage cable N
21、YCWY33 Table 16 Actual data of typical asynchronous motors.36 Table 17 Actual data of distribution busbars.38 Table 18 Example for the calculation of ) 1( X for busbars using Figures 15 and 16 .41 Table A.1 Information received from National Committees .42 -,-,- 4 TR 60909-2 IEC:2008(E) INTERNATIONA
22、L ELECTROTECHNICAL COMMISSION _ SHORT-CIRCUIT CURRENTS IN THREE-PHASE AC SYSTEMS Part 2: Data of electrical equipment for short-circuit current calculations FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electro
23、technical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specificat
24、ions, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International
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