IEC 61892-1:2015

Mobile and fixed offshore units - Electrical installations - Part 1: General requirements and conditions

IEC 61892-1:2015 contains provisions for electrical installations 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 storage purposes. This International Standard applies to all installations, whether permanent, temporary, transportable or hand-held, to AC installations up to and including 35 000 V and DC installations up to and including 1 500 V (AC and DC voltages are nominal values). This standard does not apply either to fixed equipment for medical purposes or to the electrical installations of tankers. This edition includes the following significant technical changes with respect to the previous edition:
a) The general requirement to harmonic distortion has been changed from IEC 61000-2-4 Class 2 to Class 1.
b) The voltage tolerance for a DC system has been changed from +-10 % to +10 %, -15 %.
c) Annex C (informative) regarding specification of surface treatment and protective painting system has been added.

Unités mobiles et fixes en mer - Installations électriques - Partie 1: Exigences générales et conditions

IEC 61892-1:2015 contient des dispositions concernant les installations électriques des unités mobiles et fixes en mer, y compris les canalisations, les stations de pompage ou de raclage, les stations de compression et les systèmes d'amarrage à point unique en zone exposée, qui sont utilisées dans l'industrie pétrolière en mer (offshore) pour le forage, le traitement et le stockage. La présente Norme internationale s'applique à toutes les installations, qu'elles soient permanentes ou provisoires, transportables ou portatives, aux installations en courant alternatif jusqu'à 35 000 V inclus et aux installations en courant continu jusqu'à 1 500 V inclus (les tensions alternatives et continues sont des valeurs nominales). La présente norme ne s'applique pas aux équipements fixes destinés aux applications médicales ni aux installations électriques destinées aux navires pétroliers. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) L'exigence générale relative à la distorsion harmonique est passée de la Classe 2 à la Classe 1 (voir IEC 61000-2-4).
b) La tolérance de tension d'un système à courant continu est passée de +-10 % à +10 %, -15 %.
c) L'Annexe C (informative) concernant la spécification du traitement de surface et du système de peinture protectrice a été ajoutée.

General Information

• Status: Published
• Publication Date: 12-Jul-2015
• 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 61892-1:2010 - Mobile and fixed offshore units - Electrical installations - Part 1: General requirements and conditions
• Effective Date: 05-Sep-2023
• Revised: IEC 61892-1:2019 - Mobile and fixed offshore units - Electrical installations - Part 1: General requirements and conditions
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61892-1 ®
Edition 3.0 2015-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Mobile and fixed offshore units – Electrical installations –
Part 1: General requirements and conditions

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.

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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.

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IEC 61892-1 ®
Edition 3.0 2015-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Mobile and fixed offshore units – Electrical installations –

Part 1: General requirements and conditions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-2797-8

– 2 – IEC 61892-1:2015 RLV  IEC 2015

CONTENTS
FOREWORD . 4

INTRODUCTION . 2

1 Scope . 7

2 Normative references . 7

3 Terms and definitions. 8

4 General requirements and conditions . 12

4.1 General . 12
4.2 Workmanship and material .
4.2 Acceptance of substitutes or alternatives . 12
4.3 Additions and alterations . 13
4.4 Environmental conditions. 13
4.4.1 General . 13
4.4.2 Design parameters . 13
4.5 Materials . 14
4.6 Power supply system characteristics. 15
4.6.1 General . 15
4.6.2 AC distribution systems . 15
4.6.3 DC distribution systems . 17
4.7 Manual disconnection . 18
4.8 Electrical apparatus for explosive gas atmospheres . 18
4.9 Precautions against galvanic corrosion .
4.9 Clearance and creepage distances . 18
4.10 Insulation . 18
4.11 Maintenance and inspection . 19
4.12 Cable entries . 19
4.13 Precautions against vibration and mechanical shock . 19
4.14 Location of electrical equipment in units . 19
4.15 Mechanical protection . 19
4.16 Protection from heat, water, steam and oil . 20
4.17 Protection against electrical shock . 20
4.18 Enclosures . 20
4.19 Environmental impact . 20

Annex A (informative) Degree of protection . 22
A.1 Definitions of numerals in the IP code . 22
Annex B (informative) Cold climate precautions . 24
Annex C (informative) Specification of surface treatment and protective painting system . 25
C.1 Objectives . 25
C.2 General and specification . 25
C.2.1 General . 25
C.2.2 Atmospheric corrosivity categories for protective painting systems . 25
C.2.3 Durability performance of a protective painting system . 26
Annex D (informative) DC distribution systems . 28
D.1 DC distribution systems . 28
Bibliography . 29

Figure D.1 – Typical configuration of DC distribution system . 28

Table 1 – Operational design parameters – Ambient temperature . 14

Table 2 – Design parameters – Relative humidity . 14

Table 3 – Voltage characteristics . 16

Table 4 –Frequency characteristics . 17

Table 5 –Tolerances for DC system . 17

Table 6 – Fast transients . 18

Table A.1 – Degrees of protection against foreign objects indicated by the first
characteristic numeral . 22
Table A.2 – Degrees of protection against water indicated by the second characteristic
numeral . 23
Table C.1 – Description of typical atmospheric environments related to the estimation of
corrosivity categories . 26

– 4 – IEC 61892-1:2015 RLV  IEC 2015

INTERNATIONAL ELECTROTECHNICAL COMMISSION

_____________
MOBILE AND FIXED OFFSHORE UNITS –

ELECTRICAL INSTALLATIONS –
Part 1: General requirements and conditions

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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This redline version of the official IEC Standard allows the user to identify the changes
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International Standard IEC 61892-1 has been prepared by IEC technical committee 18:
Electrical installations of ships and of mobile and fixed offshore units.

This third edition cancels and replaces
...

IEC 61892-1 ®
Edition 3.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mobile and fixed offshore units – Electrical installations –
Part 1: General requirements and conditions

Unités mobiles et fixes en mer – Installations électriques –
Partie 1: Exigences générales et conditions

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.

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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.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 15
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 60 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
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IEC 61892-1 ®
Edition 3.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mobile and fixed offshore units – Electrical installations –

Part 1: General requirements and conditions

Unités mobiles et fixes en mer – Installations électriques –

Partie 1: Exigences générales et conditions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.60 ISBN 978-2-8322-2784-8

– 2 – IEC 61892-1:2015  IEC 2015

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions. 8

4 General requirements and conditions . 11

4.1 General . 11
4.2 Acceptance of substitutes or alternatives . 12
4.3 Additions and alterations . 12
4.4 Environmental conditions. 12
4.4.1 General . 12
4.4.2 Design parameters . 12
4.5 Materials . 13
4.6 Power supply system characteristics. 14
4.6.1 General . 14
4.6.2 AC distribution systems . 14
4.6.3 DC distribution systems . 16
4.7 Manual disconnection . 17
4.8 Electrical apparatus for explosive gas atmospheres . 17
4.9 Clearance and creepage distances . 17
4.10 Insulation . 17
4.11 Maintenance and inspection . 17
4.12 Cable entries . 18
4.13 Precautions against vibration and mechanical shock . 18
4.14 Location of electrical equipment in units . 18
4.15 Mechanical protection . 18
4.16 Protection from heat, water, steam and oil . 18
4.17 Protection against electrical shock . 19
4.18 Enclosures . 19
4.19 Environmental impact . 19
Annex A (informative) Degree of protection . 20
A.1 Definitions of numerals in the IP code . 20

Annex B (informative) Cold climate precautions . 22
Annex C (informative) Specification of surface treatment and protective painting system . 23
C.1 Objectives . 23
C.2 General and specification . 23
C.2.1 General . 23
C.2.2 Atmospheric corrosivity categories for protective painting systems . 23
C.2.3 Durability performance of a protective painting system . 24
Annex D (informative) DC distribution systems . 26
D.1 DC distribution systems . 26
Bibliography . 27

Figure D.1 – Typical configuration of DC distribution system . 26

Table 1 – Operational design parameters – Ambient temperature . 13

Table 2 – Design parameters – Relative humidity . 13

Table 3 – Voltage characteristics . 15

Table 4 –Frequency characteristics . 16

Table 5 –Tolerances for DC system . 16

Table 6 – Fast transients . 17

Table A.1 – Degrees of protection against foreign objects indicated by the first

characteristic numeral . 20

Table A.2 – Degrees of protection against water indicated by the second characteristic

numeral . 21
Table C.1 – Description of typical atmospheric environments related to the estimation of
corrosivity categories . 24

– 4 – IEC 61892-1:2015  IEC 2015

INTERNATIONAL ELECTROTECHNICAL COMMISSION

_____________
MOBILE AND FIXED OFFSHORE UNITS –

ELECTRICAL INSTALLATIONS –
Part 1: General requirements and conditions

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with con
...