IEC PAS 63108:2017

Electrical installation in ships - Primary DC distribution - System design architecture

IEC PAS 63108:2017 specifies the requirements of primary DC distribution systems and interconnected installations.
The requirements of this PAS establish general principles for
- operations, without degrading unit and human safety, capable of a reduced environmental footprint,
- existing and new power generating units, new DC distribution concepts for electrical power, energy storage and advanced control of a total power balance, including semiconductor converters (AC to DC, DC to DC and DC to AC power converters) and dynamic load controllers, and
- relevant system studies and calculations demonstrating a protection philosophy as needed for necessary selectivity, segregation methods and equipment.
This PAS also gives guidelines for integration of energy sources of different nature and suitable ways to identify locations of such installations.

General Information

• Status: Published
• Publication Date: 21-May-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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
• Current Stage: PPUB - Publication issued
• Start Date: 21-Jun-2017
• Completion Date: 22-May-2017

Standards Content (Sample)

IEC PAS 63108 ®
Edition 1.0 2017-05
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Electrical installations in ships – Primary DC distribution – System design
architecture
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IEC PAS 63108 ®
Edition 1.0 2017-05
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Electrical installations in ships – Primary DC distribution – System design

architecture
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-4400-5

– 2 – IEC PAS 63108:2017  IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 8
4.1 General . 8
4.2 Acceptance of substitutes or alternatives . 9
4.3 Provisions for maximum load . 9
4.4 Additions and alterations . 9
4.5 Environmental conditions . 9
4.6 Power supply system characteristics . 9
4.6.1 General . 9
4.6.2 DC distribution systems limits . 9
4.7 Mechanical protection . 9
4.8 Enclosures . 9
5 System design . 10
5.1 General . 10
5.2 Power quality . 10
5.3 Combined AC and DC distribution systems . 10
5.4 Black-out start up and start from dead ship condition . 10
5.5 DC distribution systems . 10
5.6 AC distribution systems . 10
5.7 Shore powered charging systems . 10
5.8 Short-circuit currents in combined AC and DC systems . 11
5.8.1 General . 11
5.8.2 Short-circuit current in DC systems . 11
5.9 System studies and calculations . 11
5.10 Protection . 11
5.10.1 General . 11
5.10.2 Fixed and variable speed AC generator protection . 12
5.10.3 Battery circuits . 12
5.10.4 Safety barriers for energy storage systems . 12
5.10.5 Protection against electric shock . 13
5.11 Protection of interconnection to shore . 13
6 Sources of electrical power . 13
6.1 General . 13
6.2 AC power generation with variable speed . 13
6.3 DC power generation with variable speed . 14
6.4 Various DC power sources . 14
6.5 Load sharing . 14
6.6 Transient operation . 14
7 Power distribution systems . 14
7.1 General . 14
7.2 AC distribution systems . 14
7.3 DC distribution systems . 14

7.4 DC distribution systems feeding AC distribution systems . 15
8 Equipment . 15
8.1 General . 15
8.2 Generators . 15
8.3 DC assemblies . 15
8.3.1 General . 15
8.3.2 Cooling . 15
8.3.3 Individual circuits . 16
9 Control systems . 17
9.1 General . 17
9.2 Control architecture . 17
9.3 Automatic control of vessel energy systems . 17
9.3.1 General . 17
9.3.2 Initiation of start-commands . 18
9.3.3 Transfer of start-command . 18
9.3.4 Events and indications . 18
9.3.5 Automatic reconnection to dead DC distribution system . 18
9.3.6 Automatic load sharing . 18
10 Installation . 18
11 Testing, verification and documentation . 19
11.1 General requirements . 19
11.2 Factory acceptance test . 19
11.3 On-board testing (site testing) . 19
11.4 Documentation . 19
Bibliography . 20

– 4 – IEC PAS 63108:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS IN SHIPS –

Primary DC distribution – System design architecture

FOREWORD
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