IEC_IEEE_60076-57-1202-2017.pdf

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)colourinside THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva,Switzerland Copyright 2017 IEEE All r ights reserved.Unless other wise 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 being secured.Requests for per mission to r eproduce should be addressed to either IEC at the address below or IECs member National Committee in the country of the requester or fr om IEEE.IEC Centr al Office Institute of Electrical and Electronics Engineer s,Inc.3,rue de Varemb 3 Par k Avenue CH-1211 Geneva 20 New Yor k,NY 10016-5997 Switzerland United States of America Tel.:+41 22 919 02 11 stds.iprieee.org Fax:+41 22 919 03 00 www.ieee.org infoiec.ch www.iec.ch About t he IEC The International Electr otechnical Commission(IEC)is the leading global organization that prepar es and publishes Inter national Standards for all electr ical,electronic and related technologies.About t he IEEE IEEE is the worlds largest professional association dedicated to advancing technological innovation and excellence for the benefit of humanity.IEEE and its member s inspire a global community through its highly cited publications,conferences,technology standar ds,and professional and educational activities.About IEC/IEEE publications The technical content of IEC/IEEE publications is kept under constant r eview by the IEC and IEEE.Please make sure that you have the latest edition,a cor rigendum or an amendment might have been published.IEC Cat alogue-webstore.iec.ch/cat alogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.A vailable for PC,Mac OS,Android Tablets and iPad.IEC publications search-w w w.iec.ch/searchpub The adv anced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also giv es information on projec ts,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Av ailable online and also once a month by email.Elect ropedia-w w w.elect ropedia.org The worlds leading online dic tionary of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equiv alent terms in 16 additional languages.A lso known as the International Elec trotechnical Vocabulary (IEV)online.IEC Glossary-st d.iec.ch/glossar y 65 000 elec trotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries hav e been collec ted from earlier public ations of IEC TC 37,77,86 and CISPR.IEC Customer Serv ice Centre-webstore.iec.ch/csc If y ou wish to giv e us y our feedback on this publication or need further assistance,please 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 Use 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.12 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).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 Construction.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