IEC_TS_62727-2012.pdf

IEC/TS 62727 Edition 1.0 2012-05 TECHNICAL SPECIFICATION Photovoltaic systems Specifications for solar trackers IEC/TS 62727:2012(E)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC,Geneva,Switzerland All rights reserved.Unless otherwise 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 from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.Useful links:IEC publications search-www.iec.ch/searchpub The advanced search enables you to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications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.Available on-line and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary(IEV)on-line.Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC/TS 62727 Edition 1.0 2012-05 TECHNICAL SPECIFICATION Photovoltaic systems Specifications for solar trackers INTERNATIONAL ELECTROTECHNICAL COMMISSION U ICS 27.160 PRICE CODE ISBN 978-2-83220-122-0 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TS 62727 IEC:2012(E)CONTENTS FOREWORD.5 1 Scope and object.7 2 Terms and definitions.7 2.1 Photovoltaics(PV).7 2.2 Concentrating photovoltaics(CPV).7 2.3 Concentrator module(CPV module).7 2.4 Concentrator assembly.8 3 Specifications for solar trackers for PV applications.8 3.1 Specification template.8 4 Tracker definitions and taxonomy.10 4.1 General.10 4.2 Payload types.10 4.2.1 Standard photovoltaic(PV)module trackers.10 4.2.2 Concentrated photovoltaic(CPV)module trackers.11 4.3 Rotational axes.11 4.3.1 Single axis trackers.11 4.3.2 Dual axis trackers.12 4.4 Actuation and control.14 4.4.1 Architecture.14 4.4.2 Drive types.14 4.5 Types of tracker control.15 4.5.1 Passive control.15 4.5.2 Active control.15 4.5.3 Backtracking.15 4.6 Structural characteristics.16 4.6.1 Vertical supports.16 4.6.2 Foundation types.16 4.6.3 Tracker positions.17 4.6.4 Stow time.17 4.7 Energy consumption.17 4.7.1 Daily energy consumption.17 4.7.2 Stow energy consumption.18 4.8 External elements and interfaces.18 4.8.1 Foundation.18 4.8.2 Foundation interface.18 4.8.3 Payload.18 4.8.4 Payload interface.18 4.8.5 Payload mechanical interface.18 4.8.6 Payload electrical interface.18 4.8.7 Grounding interface.18 4.8.8 Installation effort.18 4.8.9 Control interface.19 4.9 Internal tolerances.19 4.9.1 Primary axis tolerance.19 4.9.2 Secondary axis tolerance.20 4.10 Tracker system elements.20 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.TS 62727 IEC:2012(E)3 4.10.1 Mechanical structure.20 4.10.2 Tracker controller.20 4.10.3 Sensors.20 4.11 Reliability terminology.20 4.11.1 Mean time between failures(MTBF).20 4.11.2 Mean time between critical failures(MT