IEC 60092-503:2021

Electrical installations in ships - Part 503: Special features - AC supply systems with voltages in the range of above 1 kV up to and including 36 kV

IEC 60092-503:2021(E) is applicable to AC supply systems with voltages from 1 kV up to and including 36 kV. The requirements contained in other parts of the IEC 60092 series apply where appropriate, subject to the exceptions stated in the clauses of this document.

General Information

• Status: Published
• Publication Date: 26-Oct-2021
• 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 6 - TC 18/MT 6
• Current Stage: PPUB - Publication issued
• Start Date: 19-Nov-2021
• Completion Date: 27-Oct-2021

Relations

• Revises: IEC 60092-503:2007 - Electrical installations in ships - Part 503: Special features - AC supply systems with voltages in the range of above 1 kV up to and including 15 kV
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60092-503 ®
Edition 3.0 2021-10
INTERNATIONAL
STANDARD
Electrical installations in ships –
Part 503: Special features – AC supply systems with voltages in the range of
above 1 kV up to and including 36 kV
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IEC 60092-503 ®
Edition 3.0 2021-10
INTERNATIONAL
STANDARD
Electrical installations in ships –

Part 503: Special features – AC supply systems with voltages in the range of

above 1 kV up to and including 36 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-1039-2

– 2 – IEC 60092-503:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 9
4.1 Environmental conditions . 9
4.2 System design . 9
4.3 Personnel safety . 9
4.4 Operational safety . 9
4.5 Integrity of external power supply. 9
4.6 Electrical and mechanical interlockings . 10
4.7 Selection criteria for distribution systems . 10
4.8 Distribution systems network earthing . 10
4.9 Divided system . 11
5 Insulation . 11
5.1 Selection of insulation level. 11
5.1.1 General . 11
5.1.2 Lightning impulse withstand voltage . 11
5.1.3 Consideration of rated withstand voltages . 11
5.2 Verification of clearance and creepage distances . 11
5.2.1 Clearance distance . 11
5.2.2 Creepage distance . 12
5.3 Voltage and frequency . 12
6 Electrical protection . 13
6.1 General . 13
6.2 Voltage-transformer protection . 13
6.3 Overvoltage protection . 13
6.4 Earth-fault monitoring . 14
7 High voltage equipment . 14
7.1 General . 14
7.1.1 Ingress protection . 14
7.1.2 Earthing of current and voltage transformers . 14
7.1.3 Safe earthing measures . 14
7.1.4 Accumulation of moisture and condensation . 15
7.1.5 Liquid cooling . 15
7.1.6 Terminals . 15
7.2 Switchgear and controlgear assemblies . 15
7.2.1 Design and construction . 15
7.2.2 Handrails . 16
7.2.3 Door opening . 16
7.2.4 Encapsulation . 16
7.2.5 Internal arc classification . 16
7.2.6 Continuous (common) busbar compartment . 16
7.2.7 Busbars of main switchboards . 17
7.2.8 Generator circuits . 17

7.2.9 Outgoing circuits . 17
7.2.10 Power-transformer circuits . 17
7.2.11 Shore-connection circuits . 17
7.2.12 Earthing switches . 17
7.2.13 Earthing of equipment . 18
7.2.14 Auxiliary circuits . 18
7.3 Generators and motors . 18
7.3.1 General . 18
7.3.2 Installation . 18
7.3.3 Encapsulation . 18
7.3.4 Temperature monitoring . 18
7.3.5 Stator winding circuit arrangement . 18
7.3.6 De-excitation . 18
7.4 Transformers and reactors . 19
7.4.1 General . 19
7.4.2 Enclosures and installation . 19
7.4.3 Encapsulation . 19
7.4.4 Temperature monitoring . 19
7.5 Converters . 19
7.5.1 General . 19
7.5.2 Encapsulation . 19
7.6 Cables . 20
7.6.1 General . 20
7.6.2 Installation . 20
7.6.3 Conductors and terminations . 20
7.6.4 Testing . 20
7.7 System test . 21
8 Installation requirements for high voltage equipment . 21
8.1 Access . 21
8.2 Identification and marking . 21
8.2.1 General . 21
8.2.2 Labelling . 21
8.2.3 Information plates and warning plates . 22
8.2.4 Installations with incorporated capacitors. 22
Bibliography . 23

Table 1 – Minimum clearance . 12
Table 2 – AC three-phase systems having a nominal voltage above 1 kV and up to
and including 36 kV . 13
Table 3 – Minimum IP ratings . 14

– 4 – IEC 60092-503:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Part 503: Special features –
AC supply systems with voltages in the range
of above 1 kV up to and including 36 kV

FOREWORD
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