IEC_61892-3-2012.pdf

IEC 61892-3 Edition 3.0 2012-03 INTERNATIONAL STANDARD Mobile and fixed offshore units Electrical installations Part 3:Equipment IEC 61892-3:2012(E)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by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications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.IEC 61892-3 Edition 3.0 2012-03 INTERNATIONAL STANDARD Mobile and fixed offshore units Electrical installations Part 3:Equipment INTERNATIONAL ELECTROTECHNICAL COMMISSION XA ICS 47.020.60 PRICE CODE ISBN 978-2-88912-991-1 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 61892-3 IEC:2012(E)CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.9 2 Normative references.9 3 Terms and definitions.12 4 General requirements.15 4.1 Environmental conditions.15 4.1.1 General.15 4.1.2 Ambient air temperature.15 4.1.3 Temperature rise.15 4.1.4 Vibration.15 4.2 Degree of protection.16 4.3 Nameplates and labels.16 4.4 Voltage and frequency variations.16 4.5 Electromagnetic compatibility.17 4.6 Terminations.17 5 Generators and motors.17 5.1 General.17 5.2 Voltage regulation of generators.17 5.2.1 General.17 5.2.2 DC generators.18 5.2.3 AC generators.18 5.3 Generators for special purposes.19 5.3.1 DC generators.19 5.3.2 AC generators.19 5.4 Parallel operation of general service generators AC generators.19 5.4.1 Reactive load sharing.19 5.4.2 Load sharing.19 5.4.3 Flywheel effect for a.c.generators.19 5.4.4 Excitation of a.c.generators.20 5.5 Mechanical features(generators and motors).20 5.5.1 Entry of water.20 5.5.2 Accumulation of moisture and condensation.20 5.5.3 Balance.20 5.5.4 Shaft currents.20 5.5.5 Terminals.21 5.6 Lubrication(generators and motors).21 5.7 Prime movers.21 5.7.1 General.21 5.7.2 Speed governing characteristics.21 5.7.3 Flywheel effect.22 5.8 Cyclic irregularity.22 5.9 Lubrication(prime movers).22 5.10 Running speed.23 5.11 Testing.23 61892-3 IEC:2012(E)3 6 Transformers for power and lighting.23 6.1 General.23 6.2 Winding arrangement.24 6.3 Terminals.24 6.4 Cooling arrangement.24 6.5 Voltage regulation.24 6.6 Tests.24 7 Switchgear and controlgear assemblies.25 7.1 Service conditions.25 7.2 Definitions.25 7.3 Locking facilities.25 7.4 Low-voltage switchgear and controlgear assemblies.25 7.4.1 General.25 7.4.2 Temperature rise.25 7.4.3 Circuits.25 7.4.4 Marking of parts.26 7.4.5 Design and construction.26 7.4.6 Barriers between generator sections.28 7.4.7 Internal electrical circuits and connections.28 7.4.8 Design verification.29 7.5 Switchgear and controlgear in the range above 1 kV up to and including 35 kV.30 7.5.1 General.30 7.5.2 Service conditions.30 7.5.3 Ratings.30 7.5.4 Design and construction.30 7.5.5 Degree of protection provided by enclosures.30 7.5.6 Circuit breakers,switches and fuses.30 7.5.7 Earthing and short-circuiting.31 7.5.8 Protection against live parts.31 7.5.9 Internal wiring.31 7.5.10 Auxiliary systems.31 7.6 Instruments for assemblies.31 7.6.1 General.31 7.6.2 Instrument for a.c.generators.32 7