IEC 60092-302-2:2019

IEC 60092-302-2 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
Electrical installations in ships –
Part 302-2: Low voltage switchgear and controlgear assemblies – Marine power

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IEC 60092-302-2 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
Electrical installations in ships –

Part 302-2: Low voltage switchgear and controlgear assemblies – Marine power

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-6662-5

– 2 – IEC 60092-302-2:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
5 Interface characteristics. 7
6 Information . 8
7 Service conditions . 9
8 Constructional requirements . 9
9 Performance requirements. 12
10 Design verification . 13
11 Routine verification . 15
Annex AAA (informative) Items subject to agreement between the assembly
manufacturer and the user . 19
Bibliography . 24

Figure 201 – Relationship of standards . 5

Table 1 – Minimum clearances in air (8.3.2) . 15
Table 2 – Minimum creepage distances (8.3.3) . 16
Table 6 – Temperature rise limits (9.2). 17
Table AAA.1 – Items subject to agreement between the assembly manufacturer and
the user . 19

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 302-2: Low voltage switchgear and
controlgear assemblies – Marine power

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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60092-302-2 has been prepared by IEC technical committee 18:
Electrical installations of ships and of mobile and fixed offshore units.
This first edition cancels and replaces the fourth edition of IEC 60092-302 published in 1997.
This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) this document has been renumbered to fall in line with IEC 61439 (all parts);
b) this document has been restructured to fall in line with IEC 61439 (all parts);
c) the creepage distances have been modified;
d) the references to non type tested assemblies (NTTA) have been removed;
e) non-applicable tables have been removed;

– 4 – IEC 60092-302-2:2019 © IEC 2019
f) the applicability of IEC 61439 (all parts) annexes have been identified.
g) specific requirements that were detailed in IEC 60092-302:1997, covered under 7.6.101
have partly been moved to 60092-201.
The text of this document is based on the following documents:
FDIS Report on voting
18/1656/FDIS 18/1668/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 61439-1:2011 and
IEC 61439-2:2011.
This document supplements or modifies the corresponding clauses in IEC 61439-1:2011 and
IEC 61439-2:2011. Where this document states "addition", "deletion" or "replacement", the
relevant text of IEC 61439-1:2011 and IEC 61439-2:2011 is adapted accordingly.
Clauses and subclauses which are additional to those of IEC 61439-1:2011 and
IEC 61439-2:2011 are numbered starting from 201. Additional annexes are numbered starting
from AAA.
In this document, terms written in small capitals are defined in Clause 3.
Where the abbreviated term PSC-assembly is used in applicable clauses of IEC 61439-2:2011,
this refer to MPSC-assembly.
A list of all parts in the IEC 60092 series, published under the general title Electrical
installations in ships, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

INTRODUCTION
This part of IEC 60092 forms a series of International Standards for electrical installations in
sea-going ships, incorporating good practice and coordinating, as far as possible, existing
rules.
These standards form a code of practical interpretation and amplification of the requirements
of the International Convention for the Safety of Life at Sea, a guide for future regulations
which may be prepared and a statement of practice for use by ship owners, shipbuilders and
appropriate organizations.
IEC 61439 (all parts) identifies the requirements for land based low voltage switchgear and
controlgear assemblies. IEC 60092-302 (all parts) has been developed in-line with Figure 201,
which shows the future intention to develop appropriate marine standards for final distribution
boards to be operated by ordinary persons; and busbar trunking systems.
IEC 60092 (all parts) remains the lead standard series for electrical installations in ships, and
the applicable standards are applied accordingly. Wherever there are differences between
IEC 61439 (all parts) and IEC 60092 (all parts), IEC 60092 (all parts) takes precedence.
IEC 61439-1
IEC 61439-2 IEC 61439-3 IEC 61439-4 IEC 61439-5 IEC 61439-6
IEC IEC IEC
a a
60092-302-2 60092-302-3 60092-302-6
IEC 60092
SSereriieses
IEC
Key
a
Under consideration.
NOTE At the time of publication, IEC 60092-302-3 and IEC 60092-302-6 are not developed. The figure shows that
these standards are potential future projects to align with the IEC 61439 series.
Figure 201 – Relationship of standards

– 6 – IEC 60092-302-2:2019 © IEC 2019
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 302-2: Low voltage switchgear and
controlgear assemblies – Marine power

1 Scope
This part of IEC 60092 defines the specific requirements of low voltage marine power
switchgear and controlgear assemblies (MPSC-assemblies) as follows:
• stationary assemblies with enclosure for which the rated voltage does not exceed
1 000 V AC or 1500 V DC;
• assemblies intended for use in conjunction with the power generation, distribution and
conversion of electric energy, and for the control of electric energy consuming equipment.
This document applies to all assemblies whether they are designed, manufactured and
verified on a one-off basis or fully standardised and manufactured in quantity.
The manufacture and/or assembly can be carried out other than by the orig
...