1、 IEC/IEEE 60076-57-1202 Edition 1.0 2017-05 INTERNA TIONAL STA NDA RD NORME INTERNA TIONALE Power transformers Part 57-1202:Liquid immersed phase-shifting transformers Transformateurs de puissance Partie 57-1202:Transformateurs dphaseurs immergs dans un liquide IEC/IEEE 60076-57-1202:2017-05(en-fr)c
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12、e contac t the Customer Serv ice Centre:csciec.ch.?IEC ISBN 978-2-8322-4258-2 IEEE ISBN 978-1-5044-2015-0STD20936?c olourinside 2 IEC/IEEE 60076-57-1202:2017 IEC/IEEE 2017 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 2.1 IEC references.7 2.2 IEEE references.7 3 Terms and definitions.8 4 Us
13、e of normative references.11 5 Service conditions.11 5.1 General.11 5.2 Usual service conditions.11 5.2.1 Switching arrangement.11 5.2.2 Power flow.11 5.2.3 Operation with two or more PSTs in series or parallel.11 5.2.4 Phase unbalance.12 5.2.5 Surge protection.12 6 Rating and general requirements.1
14、2 6.1 Rated power.12 6.2 Loading at other than rated conditions.12 6.3 Specification of buck capability.12 6.4 Cooling modes.13 6.5 Short circuit impedance and load phase angle capability.13 6.5.1 Specification.13 6.5.2 Short circuit impedance for asymmetric designs.13 6.6 Neutral earthing(grounding
15、).13 6.7 Rated voltage.13 6.8 Voltage variation and asymmetric design.13 6.9 Rated frequency.14 6.10 Operation at higher than rated voltage and/or at other than rated frequency.14 6.11 Highest voltage for equipment and dielectric test levels.14 6.12 Taps.14 6.13 Sound level.14 6.14 Transport.14 7 Co
16、nstruction.14 7.1 General.14 7.2 Liquid-filled connections between tanks.15 7.3 Liquid insulation and preservation system.15 7.4 Alignment between tanks.15 7.5 Core and core frame earthing arrangements.16 7.6 Test connections.16 8 Short circuit capability.16 9 Connection phase displacement symbols.16 9.1 General.16 9.2 Special symbols for PSTs.16 9.3 Clock number notation.17 9.4 Examples.17 9.4.1 Single core phase shifting transformers.17 IEC/IEEE 60076-57-1202:2017 3 IEC/IEEE 2017 9.4.2 Two cor
