IEC 60092-202:2016

Electrical installations in ships - Part 202: System design - Protection

IEC 60092-202:2016 is applicable to the main features of the electrical protective system to be applied to electrical installations for use in ships. This fifth edition cancels and replaces the fourth edition published in 1994 and Amendment 1:1996. This edition constitutes a full technical revision.

Installations électriques à bord des navires - Partie 202: Conception des systèmes - Protection

L'IEC 60092-202:2016 s'applique aux principales caractéristiques du système de protection électrique à appliquer aux installations électriques à bord des navires. Cette cinquième édition annule et remplace la quatrième édition parue en 1994 et l'Amendement 1:1996. Cette édition constitue une révision technique complète.

General Information

• Status: Published
• Publication Date: 18-Sep-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.020 - Electronic components in general
• 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 2 - TC 18/MT 2
• Current Stage: PPUB - Publication issued
• Start Date: 15-Oct-2016
• Completion Date: 19-Sep-2016

Standards Content (Sample)

IEC 60092-202 ®
Edition 5.0 2016-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electrical installations in ships –
Part 202: System design – Protection

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 60092-202 ®
Edition 5.0 2016-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electrical installations in ships –

Part 202: System design – Protection

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-3660-4

– 2 – IEC 60092-202:2016 RLV © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references. 8
3 Terms and definitions . 8
4 General requirements . 10
4.1 General . 10
4.2 Basic protection . 11
4.3 Studies and calculations . 11
5 Electrical load study . 11
6 Short-circuit current calculations . 11
7 Protection discrimination study . 12
7.1 General . 12
7.2 Current selectivity . 12
7.3 Time-current selectivity . 13
7.4 Alternative protection schemes . 13
8 Characteristics and choice of protective devices with reference to short-circuit
rating . 13
8.1 General . 13
8.2 Protective devices . 13
8.3 Rated short-circuit breaking capacity . 14
8.4 Rated short-circuit making capacity . 15
8.5 Co-ordination of short-circuit ratings with regard to continuity of service
requirements Co-ordinated choice of protective devices with regard to
discrimination requirements . 15
9 Choice of protective devices with reference to overload . 16
9.1 Mechanical switching devices . 16
9.2 Fuses for overload protection . 17
9.3 Static or solid state switching devices . 17
10 Choice of protective devices with regard to their application . 17
10.1 General . 17
10.2 Generator protection . 17
10.2.1 General . 17
10.2.2 Protection against short-circuits and fault currents on the generator side . 18
10.3 Protection of essential services . 18
10.4 Protection of transformers . 18
10.5 Circuit protection . 19
10.6 Motor protection . 19
10.7 Accumulator (storage) battery protection . 19
10.8 Protection of meters, pilot lamps and control circuits . 20
10.9 Protection of static or solid-state devices . 20
11 Reverse power and reverse current protection for AC generators . 20
12 Undervoltage protection . 21
12.1 A.C. and d.c. DC generators . 21
12.2 A.C. and d.c. DC motors . 21

13 Overvoltage protection . 21
13.1 General . 21
13.2 Transformers . 21
13.3 AC machines . 21
14 Protection against under- and over-frequency . 21
Bibliography . 22

Figure 1– Continuity of supply and service . 16

– 4 – IEC 60092-202:2016 RLV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 202: System design – Protection

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
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agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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International Standard IEC 60092-202 has been prepared by IEC technical
committee 18: Electrical installations of ships and of mobile and fixed offshore units.
This fifth edition cancels and replaces the fourth edition published in 1994 and
Amendment 1:1996. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
This document: Previous document:
Clause/subclause No. and heading Corresponding clause/subclause No., remark
1 Scope 1, No change
2 Normative references 2, Updated
3 Definitions 3, Several definitions changed and added
4 General requirements 4, Text changed
4.1 General New clause/subclause
4.2 Basic protection New clause/subclause
4.3 Studies and calculations New clause/subclause
5 Electrical load study New clause/subclause
6 Short-circuit current calculations 5, Heading change
- 5.1, Text changed and moved to new Clause 6
- 5.2, Text deleted, for DC-Systems reference to
IEC 61660-1 added
7 Protection discrimination study New clause/subclause
7.1 General New clause/subclause
7.2 Current selectivity New clause/s
...

IEC 60092-202 ®
Edition 5.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations in ships –
Part 202: System design – Protection

Installations électriques à bord des navires –
Partie 202: Conception des systèmes – Protection

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
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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 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. 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 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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IEC 60092-202 ®
Edition 5.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations in ships –

Part 202: System design – Protection

Installations électriques à bord des navires –

Partie 202: Conception des systèmes – Protection

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.60 ISBN 978-2-8322-3599-7

– 2 – IEC 60092-202:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 10
4.1 General . 10
4.2 Basic protection . 10
4.3 Studies and calculations . 10
5 Electrical load study . 11
6 Short-circuit current calculations . 11
7 Protection discrimination study . 11
7.1 General . 11
7.2 Current selectivity . 12
7.3 Time-current selectivity . 12
7.4 Alternative protection schemes . 12
8 Characteristics and choice of protective devices with reference to short-circuit
rating . 12
8.1 General . 12
8.2 Protective devices . 12
8.3 Rated short-circuit breaking capacity . 13
8.4 Rated short-circuit making capacity. 13
8.5 Co-ordinated choice of protective devices with regard to discrimination
requirements . 13
9 Choice of protective devices with reference to overload . 14
9.1 Mechanical switching devices . 14
9.2 Fuses for overload protection . 14
9.3 Static or solid state switching devices . 15
10 Choice of protective devices with regard to their application . 15
10.1 General . 15
10.2 Generator protection . 15
10.2.1 General . 15
10.2.2 Protection against short-circuits and fault currents on the generator side . 15
10.3 Protection of essential services . 16
10.4 Protection of transformers . 16
10.5 Circuit protection . 16
10.6 Motor protection . 16
10.7 Accumulator (storage) battery protection . 17
10.8 Protection of meters, pilot lamps and control circuits . 17
10.9 Protection of static or solid-state devices . 17
11 Reverse power and reverse current protection for AC generators . 17
12 Undervoltage protection . 17
12.1 A.C. and DC generators . 17
12.2 A.C. and DC motors . 18
13 Overvoltage protection . 18

13.1 General . 18
13.2 Transformers . 18
13.3 AC machines . 18
14 Protection against under- and over-frequency . 18
Bibliography . 19

Figure 1 – Continuity of supply and service . 14

– 4 – IEC 60092-202:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 202: System design – Protection

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 conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international unifor
...