1、 IEC/TR 60909-2Edition 2.0 2008-11TECHNICAL 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)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUP
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9、Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC/TR 60909-2Edition 2.0 2008-11TECHNICAL REPORT Short-circuit currents in three-phase a.c.systems Part 2:Data of electrical equipment for short-circuit current calc
10、ulations INTERNATIONAL ELECTROTECHNICAL COMMISSION XICS 17.220.01;29.240.20 PRICE CODEISBN 2-8318-1016-1 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 60909-2
11、 IEC:2008(E)CONTENTS FOREWORD.4 1 General.6 1.1 Scope and object.6 1.2 Normative references.6 2 Data for electrical equipment.6 2.1 General.6 2.2 Data of typical synchronous machines.7 2.3 Data of typical two-winding,three-winding and auto-transformers.10 2.4 Data of typical overhead lines,single an
12、d double circuits.14 2.5 Data of typical high-voltage,medium-voltage and low-voltage cables.20 2.6 Data of typical asynchronous motors.35 2.7 Busbars.38 Annex A(informative)Information from National Committees.42 Bibliography.43 Figure 1 Subtransient reactance of synchronous machines 50 Hz and 60 Hz
13、(Turbogenerators,salient pole generators,motors SM and condensers SC).8 Figure 2 Rated Voltage rGU and rated power factor rGcos of synchronous machines(Turbo generators,salient pole generators,motors and condensers 50 Hz and 60 Hz).9 Figure 3 Unsaturated and saturated synchronous reactance of two-po
14、le 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 voltages ukr of network transformers.14
15、 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-values converted to 50 Hz).19 Figure 9 Type of overhead l
16、ines.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 3.35 Figure 12 Reduction factor depending on the inducing current for cables with three lead sheaths and two overlapping steel tapes,f=50 Hz 3.35 Figure 13 Ratio rMLRII/of low-voltage and medium-voltage asynchronous motors,50 Hz and 60 Hz.37 Figure 14 Product rMrMxcos of low-voltage and medium-v
