1、 IEC TS 60076-20 Edition 1.0 2017-01 TECHNICAL SPECIFICATION Power transformers Part 20:Energy efficiency IEC TS 60076-20:2017-01(en)colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECNot for Resale,02/05/2017 21:13:07 MSTNo reproduction or networki
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11、 by IHS under license with IECNot for Resale,02/05/2017 21:13:07 MSTNo reproduction or networking permitted without license from IHS-,-,-IEC TS 60076-20 Edition 1.0 2017-01 TECHNICAL SPECIFICATION Power transformers Part 20:Energy efficiency INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.180 ISBN
12、978-2-8322-3870-7 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECNot for Resale,02/05/2017
13、21:13:07 MSTNo reproduction or networking permitted without license from IHS-,-,-2 IEC TS 60076-20:2017 IEC 2017 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.8 3 Terms and definitions.8 4 Efficiency and efficiency index calculation.9 4.1 General.9 4.2 Methods of evaluating ene
14、rgy performance.10 4.3 Method A.11 4.3.1 Efficiency index general formula.11 4.3.2 Peak efficiency index.11 4.4 Method B.12 4.4.1 Efficiency index general formula(EIB).12 4.4.2 Efficiency index at 50%loading(EIB50).12 5 Specification of energy performance.13 6 Energy performance levels.13 6.1 Genera
15、l.13 6.2 Liquid immersed transformers.14 6.2.1 Minimum PEI method A.14 6.2.2 Maximum load losses and maximum no load losses for transformers with rated frequency equal to 50 Hz.16 6.2.3 Efficiency index method B.17 6.3 Dry type transformers.19 6.3.1 Minimum PEI value method A.19 6.3.2 Maximum load l
16、oss and maximum no load loss for transformers with rated frequency equal to 50 Hz.21 6.3.3 Efficiency index method B at 50%load factor.22 7 Tolerance.25 7.1 General.25 7.2 Losses.25 7.3 PEI.25 (informative)Capitalisation of losses.26 Annex AA.1 General theory,concept of capitalisation.26 A.2 Impact of capitalisation values.27 A.3 Capitalisation formula.27 A.3.1 General.27 A.3.2 Calculation of factor A.28 A.3.3 Calculation of factor B.28 A.3.4 Use of A and B for tender evaluation.30 A.3.5 Determi
