IEC_60034-2-1_2.pdf

IEC 60034-2-1Edition 1.0 2007-09INTERNATIONAL STANDARD NORME INTERNATIONALERotating electrical machines Part 2-1:Standard methods for determining losses and efficiency from tests(excluding machines for traction vehicles)Machines lectriques tournantes Partie 2-1:Mthodes normalises pour la dtermination des pertes et du rendement partir dessais(lexclusion des machines pour vhicules de traction)INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XBICS 29.160 PRICE CODECODE PRIXISBN 2-8318-9250-3This is a preview-click here to buy the full publication 2 60034-2-1 IEC:2007 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Symbols and abbreviated terms.13 4.1 Symbols.13 4.2 Additional subscripts.14 5 Basic requirements.15 5.1 Direct and indirect efficiency determination.15 5.2 Uncertainty.15 5.3 Preferred methods.16 5.4 Power supply.20 5.5 Instrumentation.20 5.6 Units.21 5.7 Resistance.21 6 Test methods for determination of efficiency.22 6.1 State of the machine under test and test categories.22 6.2 Excitation circuit measurements.23 6.3 Direct measurements.23 6.4 Indirect measurements.25 7 Determination of efficiency(direct current machines).37 7.1 Determination from direct measurement.37 7.2 Determination from indirect measurement.37 8 Determination of efficiency(induction machines).42 8.1 Determination from direct measurement.42 8.2 Determination from indirect measurement.43 9 Determination of efficiency(synchronous machines).54 9.1 Determination from direct measurement.54 9.2 Determination from indirect measurement.55 Annex A(normative)Correction of dynamometer torque readings.61 Annex B(normative)Calculation of values for the Eh-star method.63 Annex C(informative)Types of excitation systems.66 Annex D(normative)Other test methods.67 This is a preview-click here to buy the full publication60034-2-1 IEC:2007 3 Figure 1 Sketch for torque measurement test.24 Figure 2 Sketch for dual supply back-to-back test (for synchronous machines:MGMG,IIff=).24 Figure 3 Sketch for single supply back-to-back test,d.c.machines.26 Figure 4 Sketch for single supply back-to-back test,synchronous machines.27 Figure 5 Induction machine,T-model with equivalent iron loss resistor.31 Figure 6 Sketch for single supply back-to-back,additional losses,d.c.machines.32 Figure 7 Eh-star test circuit.35 Figure 8 Vector diagram for obtaining current vector from reduced voltage test.46 Figure 9 Induction machines,Reduced model for calculation.49 Figure 10 Smoothing of the residual loss data.51 Figure 11 Assigned allowance for additional load losses PLL,induction machines.53 Table 1 DC machines.17 Table 2 Induction machines.18 Table 3 Synchronous machines.19 Table 4 Reference temperature.22 Table 5 Multiplying factors for different speed ratios.42 This is a preview-click here to buy the full publication 4 60034-2-1 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ROTATING ELECTRICAL MACHINES Part 2-1:Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical 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 Specifications,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,governmental and non-governmental organizations liaising with the IEC also participate in this preparation.IEC collaborates closely with the International Organization for Standardization(ISO)in accordance with conditions determined by agreement between the two organizations.2)The formal decisions or agreements of IEC on technical matters express,as nearly as possible,an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.3)IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense.While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.4)In order to promote international uniformity,IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications.Any divergence between any IEC Publication and the corresponding national or regional public