IEC 61892-3:2012

Mobile and fixed offshore units - Electrical installations - Part 3: Equipment

IEC 61892-3:2012(E) contains provisions for electrical equipment in mobile and fixed offshore units including pipeline, pumping or 'pigging' stations, compressor stations and exposed location single buoy moorings, used in the offshore petroleum industry for drilling, processing and for storage purposes. This standard applies to equipment in all installations, whether permanent, temporary, transportable or hand-held, to a.c. installations up to and including 35 000 V and d.c. installations up to and including 1 500 V (a.c. and d.c. voltages are nominal values). This standard sets requirements for equipment, which are additional to the requirements given in the product standard for the relevant equipment. This standard does not apply to the electrical installations in rooms used for medical purposes or in tankers. This edition includes the following significant technical changes with respect to the previous edition:
a) Table 4 in the previous edition of IEC 61892-3 regarding type testing has been deleted. Information regarding environmental conditions, including requirements to vibration, is now given in Clause 4;
b) for liquid immersed transformers requirement for overheating alarm and shut down has been added;
c) requirements for low voltage switchgear and controlgear have been rewritten, based on IEC 61439-1 and IEC 61439-2. Only additional requirements to those given in IEC 61439 are given in the standard;
d) requirements to low voltage circuit breakers, switches, contactors and fuses have been added;
e) requirement for subdivision of high voltage switchboard has been added;
f) requirements for luminaires have been deleted and replaced with reference to IEC 60598 series and IEC 60092-306;
g) requirements for heating and cooking appliances have been deleted and replaced with reference to IEC 60335 series;
h) requirement for portable equipment has been added.

General Information

• Status: Published
• Publication Date: 14-Mar-2012
• ICS: 47.020.60 - Electrical equipment of ships and of marine structures
• Technical Committee: TC 18 - Electrical installations of ships and of mobile and fixed offshore units
• Drafting Committee: MT 18 - TC 18/MT 18
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 09-Apr-2019

Relations

• Revises: IEC 61892-3:2007 - Mobile and fixed offshore units - Electrical installations - Part 3: Equipment
• Effective Date: 05-Sep-2023
• Revised: IEC 61892-3:2019 - Mobile and fixed offshore units - Electrical installations - Part 3: Equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61892-3 ®
Edition 3.0 2012-03
INTERNATIONAL
STANDARD
Mobile and fixed offshore units – Electrical installations –
Part 3: Equipment
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 IEC's 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.: [phone]
3, rue de Varembé Fax: [phone]

CH-1211 Geneva 20 [e-mail]
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 Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: [e-mail].

IEC 61892-3 ®
Edition 3.0 2012-03
INTERNATIONAL
STANDARD
Mobile and fixed offshore units – Electrical installations –

Part 3: Equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 47.020.60 ISBN 978-2-88912-991-1

– 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

7.6.3 Instrument for d.c. power sources . 32
7.6.4 Instruments measuring the insulation level to earth . 32
7.6.5 Design of instruments . 32
7.6.6 Transformers provided for instrumentation, protection and control
circuits. 33
7.6.7 Selection of protective devices . 33
7.6.8 Synchronizing devices . 33
7.6.9 Speed governor . 33
8 Semiconductor converters . 33
8.1 General . 33
8.2 Internal wiring . 34
8.3 Cooling arrangements . 34
8.4 Accessibility . 34
8.5 Service conditions . 34

– 4 – 61892-3 © IEC:2012(E)
8.6 Application . 35

8.6.1 Forced cooling . 35

8.6.2 Effects from and on the supply or load system . 35

8.7 Diagrams . 35

8.8 Converter transfor
...