prEN IEC/IEEE 80005-3:2026
(Main)Utility connections in port - Part 3: Low-voltage shore connection (LVSC) systems - General requirements
- Abstract
This document specifies provisions for the design, installation and testing of low-voltage shore connection (LVSC) systems, onboard ships and on shore, to supply the ship with electrical power from shore. This document is applicable to: – ships requiring up to 1 MVA while at berth; – three-phase shore connection systems rated 250 A and above, and with a nominal voltage rating of 400 V AC to 1 000 V AC; – shore-side connection systems; – shore-to -ship connection and interface equipment; – transformers and reactors; – semiconductor and rotating frequency convertors; – ship-side connection systems; – protection, control, monitoring, interlocking and power management systems. This document does not apply to: – inland navigation vessels; – high-voltage shore connection systems, including ships built in accordance with the annexes of IEC/IEEE 80005-1; – the electrical power supply during docking periods, for example dry docking and other out-of-service maintenance and repair; – systems to be operated by ordinary persons as defined in 3.19. NOTE 1 Other standards are available specifically for inland navigation vessels in Europe. NOTE 2 IEC 6 0092-507 is applicable to small vessels. NOTE 3 Additional or alternative requirements can be imposed by national administrations or the authorities within whose jurisdiction the ship is intended to operate and by the owners or authorities responsible for a shore power supply or distribution system. NOTE 4 High-voltage shore connection systems are covered by IEC/IEEE 80005-1. NOTE 5 Some existing 380 V AC ship systems can be supplied by 400 V AC.
- Status
- Not Published
- Publication Date
- 10-Oct-2027
- Current Stage
- 4020 - Enquiry circulated - Enquiry
- Start Date
- 11-Sep-2026
- Due Date
- 20-Nov-2026
- Completion Date
- 11-Sep-2026
prEN IEC/IEEE 80005-3:2026 is a draft European standard from CENELEC for low-voltage shore connection (LVSC) systems in ports. It specifies requirements for the design, installation, testing, operation, verification and documentation of systems that supply a ship with electrical power from shore, for use by ship and shore designers, terminal operators and system integrators.
What does prEN IEC/IEEE 80005-3:2026 specify?
prEN IEC/IEEE 80005-3:2026 sets general requirements for LVSC systems on ships and on shore. It applies to ships requiring up to 1 MVA at berth, three-phase shore connection systems rated 250 A and above, and nominal voltages from 400 V AC to 1 000 V AC.
The document covers shore-side equipment, ship-to-shore interface equipment, transformers and reactors, semiconductor and rotating frequency convertors, ship-side installations, and the related protection, control, monitoring, interlocking and power management systems. It excludes inland navigation vessels, high-voltage shore connection systems, docking-period supply, and systems intended for operation by ordinary persons.
The document is organized into 12 clauses, plus two annexes:
| Annex | What it covers |
|---|---|
| Annex A | Shore-to-ship connection cable, with guidance and test methods |
| Annex B | Ship-to-shore cable management and connector, with additional requirements |
What are the key requirements of prEN IEC/IEEE 80005-3:2026?
prEN IEC/IEEE 80005-3:2026 is built around compatibility, safety and coordinated ship-shore operation. In practice, this means the ship, the terminal and the connection equipment must be designed and checked as one system, not as separate products.
Compatibility must be assessed before the first connection
Clause 4.3 requires a compatibility assessment before the ship’s first arrival at a terminal. The assessment covers short-circuit levels, voltage ratings, load demand, harmonic distortion, cable length, earth fault protection, safety circuits, communication, hazardous areas and possible inrush current problems.
This matters because a shore connection can only be used safely if the ship and shore systems match in electrical ratings and operating behavior. The document also requires the ship and shore studies and calculations to be available to the involved parties.
The LVSC system uses defined power-system and earthing arrangements
Clause 6.2.3 requires LVSC systems to be designed as an unearthed system (IT). Clause 4.2.2 requires equipotential bonding between the ship hull and the shore earthing system through the earthing contacts of the connection hardware.
In practice, this affects the choice of transformers, earthing conductors, protection devices and insulation monitoring. The document also states that metallic hull and saltwater conductivity alone are not acceptable as the only bonding path.
Voltage, frequency and power quality are controlled
Clause 5.1 defines the standard shore supply voltages and frequencies used for LVSC. Clause 5.2 requires documented voltage supply quality, matching frequency between ship and shore, control of voltage variation, response to load steps and limits on total harmonic distortion (THD).
This is important because shore power must behave predictably when the ship connects, disconnects or changes load. The standard also requires the phase sequence to be correct before energizing or paralleling the system.
Protection and shutdown functions must act fast and in a coordinated way
Clauses 4.9, 6.3, 7.3.2, 8.3.3 and 8.5.4 require protection against overcurrent, earth fault, overvoltage, undervoltage, reverse power and abnormal connector conditions. Emergency shutdown facilities must trip the relevant circuit-breakers, and the safety circuit must be fail-safe and hard-wired.
In practice, this means a fault in one part of the connection must not leave the rest energized in a hazardous state. The document also requires emergency-stop locations at the ship control station, near the shore socket-outlet, near the ship inlet, at the cable management system, and at the shore-side and ship-side circuit-breaker locations.
The connection hardware and cables have defined safety features
Clause 7 requires ship-to-shore connection equipment to use coordinated cables, couplers, cable management and safety loops. Couplers must follow IEC 60309-1, include pilot contacts, and support the required sequence for connection and disconnection.
This matters because the pilot contacts verify safe connection before power contacts are engaged or separated. Clause 7.4 also requires flame-retardant cables with environmental resistance suitable for marine use, while Annex A gives cable construction and test guidance.
Ship-side and shore-side operation are both covered
Clauses 6, 8 and 9 define shore-side installation requirements, ship-side switchboard requirements, onboard transformer use, synchronization, blackout transfer and load transfer. The document allows load transfer either via blackout or via automatic synchronization, with instrumentation and interlocking matched to the chosen method.
This is important for operations teams because the standard defines what must be measured, interlocked and monitored before a transfer can take place. Where parallel operation is used, the transfer time limit and protective behavior must be defined and controlled.
Verification, periodic checks and documentation are part of the system
Clause 10 requires initial tests on the shore-side installation, ship-side installation and complete LVSC system at first call. Clause 11 requires periodic maintenance records and repeated checks, including bonding resistance and verification of earth fault status and voltage and frequency.
Clause 12 requires manufacturers and system responsible parties to provide operating principles, technical specifications, start-up and fault-finding instructions, maintenance guidance, circuit diagrams and a testing and verification programme. In practice, this is the documentation needed for commissioning, audits, troubleshooting and future repeat connections.
What terms does prEN IEC/IEEE 80005-3:2026 define?
- Cable management system (CMS) - the shore-based equipment that controls, monitors and delivers the flexible power and control cables.
- Person in charge (PIC) - the person or persons responsible for LVSC system operation.
- Pilot contact - a safety-related contact that signals correct connection and forms part of the safety circuit.
- Safety circuit - a normally closed interlocking circuit with pilot contacts and safety devices that shuts down the LVSC system after specific initiating events.
- Equipotential bonding - the electrical connection used to keep conductive parts at the same potential.
- Isolated system (IT) - a system in which no live part is intentionally earthed, except for high-impedance connections for protection or measurement.
- Load - the power consumed by the ship while connected to shore power.
- Ordinary person - a person who is neither a skilled person nor an instructed person.
Who uses prEN IEC/IEEE 80005-3:2026?
prEN IEC/IEEE 80005-3:2026 is used by shipowners, shipyard engineers, port and terminal operators, electrical designers, system integrators and maintenance teams involved in shore power connections. It is relevant for the design and commissioning of berth equipment, ship electrical interfaces, protection schemes, cable handling systems and operational procedures.
It also matters to quality and safety managers who need to verify compatibility studies, test records, maintenance records and documented operating procedures. The standard is especially relevant where a port wants different compliant ships to connect at different berths without adaptation.
What changed in prEN IEC/IEEE 80005-3:2026 from the previous edition?
The underlying IEC/IEEE 80005-3 text is identified as the first edition and it cancels and replaces IEC PAS 80005-3:2014. The foreword states that this edition constitutes a technical revision.
Which standards are used with prEN IEC/IEEE 80005-3:2026?
prEN IEC/IEEE 80005-3:2026 relies on a large set of referenced standards for ship systems, cables, switchgear, converters, tests and safety. The most important ones are:
| Referenced standard | What it contributes |
|---|---|
| IEC 60092-201, 60092-352, 60092-401, 60092-504 | Ship electrical system design, cable installation, installation test and automation/control |
| IEC 60309-1 and IEC 60309-5 | Connector and coupler requirements for LVSC hardware |
| IEC 60947-2 and IEC 60947-5-1 | Circuit-breakers and control-circuit devices |
| IEC 60364 series and IEC 60364-6 | Low-voltage installation rules and verification |
| IEC 60909 series and IEC 61363-1 | Short-circuit current calculations on shore and ship |
| IEC 60146 series and IEC 62477-1 | Semiconductor converter requirements and safety |
| IEC 60079 series | Equipment in explosive atmospheres |
| IEC 60332-1-2 | Flame propagation test for cables |
| IEC/IEEE 80005-1 | High-voltage shore connection systems for the related shore-power family |
| SOLAS 1974, Chapter II-1/D | Ship power restoration requirements referenced for emergency supply behavior |
What does the prEN IEC/IEEE 80005-3:2026 document contain?
The document contains a system block diagram, phase-sequence illustrations, a safety circuit schematic and a table of parallel connection capability. Clause 4 lays out the system concept, safety, compatibility assessment and emergency shutdown behavior, while Clauses 5 to 9 define shore supply, shore-side installation, ship-side installation and control/monitoring.
Clause 10 gives the verification and testing programme for shore-side equipment, ship-side equipment and the complete LVSC system at first call. Clause 11 covers periodic checks and maintenance, and Clause 12 defines the documentation package that manufacturers and system responsible parties must provide. Annex A adds cable design guidance and test methods, and Annex B gives the connector arrangement and cable management requirements.
Relations
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Refers
EN 60079-15:2010 - Explosive atmospheres - Part 15: Equipment protection by type of protection "n" - Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
- Refers
EN 60079-19:2011 - Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation - Effective Date
- 15-Sep-2026
- Effective Date
- 15-Sep-2026
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Frequently Asked Questions
prEN IEC/IEEE 80005-3:2026 is a draft published by CLC. Its full title is "Utility connections in port - Part 3: Low-voltage shore connection (LVSC) systems - General requirements". This standard covers: This document specifies provisions for the design, installation and testing of low-voltage shore connection (LVSC) systems, onboard ships and on shore, to supply the ship with electrical power from shore. This document is applicable to: – ships requiring up to 1 MVA while at berth; – three-phase shore connection systems rated 250 A and above, and with a nominal voltage rating of 400 V AC to 1 000 V AC; – shore-side connection systems; – shore-to -ship connection and interface equipment; – transformers and reactors; – semiconductor and rotating frequency convertors; – ship-side connection systems; – protection, control, monitoring, interlocking and power management systems. This document does not apply to: – inland navigation vessels; – high-voltage shore connection systems, including ships built in accordance with the annexes of IEC/IEEE 80005-1; – the electrical power supply during docking periods, for example dry docking and other out-of-service maintenance and repair; – systems to be operated by ordinary persons as defined in 3.19. NOTE 1 Other standards are available specifically for inland navigation vessels in Europe. NOTE 2 IEC 6 0092-507 is applicable to small vessels. NOTE 3 Additional or alternative requirements can be imposed by national administrations or the authorities within whose jurisdiction the ship is intended to operate and by the owners or authorities responsible for a shore power supply or distribution system. NOTE 4 High-voltage shore connection systems are covered by IEC/IEEE 80005-1. NOTE 5 Some existing 380 V AC ship systems can be supplied by 400 V AC.
This document specifies provisions for the design, installation and testing of low-voltage shore connection (LVSC) systems, onboard ships and on shore, to supply the ship with electrical power from shore. This document is applicable to: – ships requiring up to 1 MVA while at berth; – three-phase shore connection systems rated 250 A and above, and with a nominal voltage rating of 400 V AC to 1 000 V AC; – shore-side connection systems; – shore-to -ship connection and interface equipment; – transformers and reactors; – semiconductor and rotating frequency convertors; – ship-side connection systems; – protection, control, monitoring, interlocking and power management systems. This document does not apply to: – inland navigation vessels; – high-voltage shore connection systems, including ships built in accordance with the annexes of IEC/IEEE 80005-1; – the electrical power supply during docking periods, for example dry docking and other out-of-service maintenance and repair; – systems to be operated by ordinary persons as defined in 3.19. NOTE 1 Other standards are available specifically for inland navigation vessels in Europe. NOTE 2 IEC 6 0092-507 is applicable to small vessels. NOTE 3 Additional or alternative requirements can be imposed by national administrations or the authorities within whose jurisdiction the ship is intended to operate and by the owners or authorities responsible for a shore power supply or distribution system. NOTE 4 High-voltage shore connection systems are covered by IEC/IEEE 80005-1. NOTE 5 Some existing 380 V AC ship systems can be supplied by 400 V AC.
prEN IEC/IEEE 80005-3:2026 is classified under the following ICS (International Classification for Standards) categories: 47.020.60 - Electrical equipment of ships and of marine structures. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN IEC/IEEE 80005-3:2026 has the following relationships with other standards: It is inter standard links to EN 60079-26:2015, EN 60079-18:2015, EN 60079-6:2015/A1:2024, EN 60909-0:2001, EN 60079-14:2003, EN 60079-14:2008, EN 60079-15:2010, EN 60146-2:2000, EN 60079-1:2014/A11:2024, FprHD 60364-1:2025, EN 60079-25:2010, EN 60079-26:2004, EN 60079-15:2003, EN 60079-19:2011, EN 60079-17:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN IEC/IEEE 80005-3:2026 is associated with the following European legislation: EU Directives/Regulations: 2023/1804; Standardization Mandates: M/581. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
prEN IEC/IEEE 80005-3:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2026
Priključki v pristanišču - 3. del: Nizkonapetostni priključni sistem na kopnem
(LVSC) - Splošne zahteve
Utility connections in port - Part 3: Low-voltage shore connection (LVSC) systems -
General requirements
Versorgungsanschlüsse im Hafen - Teil 3: Niederspannungs-Landanschlusssysteme
(LVSC) - Allgemeine Anforderungen
Ta slovenski standard je istoveten z: prEN IEC/IEEE 80005-3:2026
ICS:
47.020.60 Električna oprema ladij in Electrical equipment of ships
konstrukcij na morju and of marine structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD DRAFT
prEN IEC/IEEE 80005-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2026
ICS 47.020.60 -
English Version
Utility connections in port - Part 3: Low-voltage shore connection
(LVSC) systems - General requirements
(IEC/IEEE 80005-3:2025)
To be completed Versorgungsanschlüsse im Hafen - Teil 3:
(IEC/IEEE 80005-3:2025) Niederspannungs-Landanschlusssysteme (LVSC) -
Allgemeine Anforderungen
(IEC/IEEE 80005-3:2025)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-12-04.
The text of this draft consists of the text of IEC/IEEE 80005-3:2025 (18/1878/CDV).
If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 83631 Ref. No. prEN IEC/IEEE 80005-3:2026 E
European foreword
This document (prEN IEC/IEEE 80005-3:2026) consists of the text of document IEC/IEEE 80005-
3:2025, prepared by IEC/TC 18 " Electrical installations of ships and of mobile and fixed offshore
units".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of (doa) dav + 6 months
this document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034 series Rotating electrical machines - series
IEC 60079 series Explosive atmospheres EN 60079 series
IEC 60092-101 - Electrical installations in ships - Part 101: - -
Definitions and general requirements
IEC 60092-201 2019 Electrical installations in ships - Part 201: - -
System design - General
IEC 60092-301 - Electrical installations in ships - Part 301: - -
Equipment - Generators and motors
IEC 60092-302-2 - Electrical installations in ships - Part 302-2: - -
Low voltage switchgear and controlgear
assemblies - Marine power
IEC 60092-352 - Electrical installations in ships_- Part_352: - -
Selection, installation, and operating
conditions of cables
IEC 60092-401 - Electrical installations in ships - Part 401: - -
Installation and test of completed
installation
IEC 60092-504 2016 Electrical installations in ships - Part 504: - -
Automation, control and instrumentation
IEC 60146 series Semiconductor converters -General EN 60146 series
requirements and line commutated
convertors
IEC 60309-1 - Plugs, fixed or portable socket-outlets and EN IEC 60309-1 -
appliance inlets for industrial purposes -
Part 1: General requirements
IEC 60309-5 2017 Plugs, socket-outlets and couplers for EN IEC 60309-5 2019
industrial purposes - Part 5: Dimensional
compatibility and interchangeability
requirements for plugs, socket-outlets, ship
connectors and ship inlets for low-voltage
shore connection systems (LVSC)
IEC 60332-1-2 - Tests on electric and optical fibre cables - -
under fire conditions_- Part:1-2: Test for
vertical flame propagation for a single
insulated wire or cable_- Procedure for
1_kW pre-mixed flame
IEC 60364 series Low-voltage electrical installations - series
IEC 60364-6 - Low voltage electrical installations - Part 6: HD 60364-6 -
Verification
IEC 60909 series Short-circuit currents in three-phase AC EN 60909 series
systems
IEC 60947-2 - Low-voltage switchgear and controlgear - EN IEC 60947-2 -
Part 2: Circuit-breakers
IEC 60947-5-1 - Low-voltage switchgear and controlgear - EN IEC 60947-5-1 -
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
IEC 61363-1 - Electrical installations of ships and mobile - -
and fixed offshore units - Part 1:
Procedures for calculating short-circuit
currents in three-phase a.c.
IEC 62477-1 - Safety requirements for power electronic EN IEC 62477-1 -
converter systems and equipment - Part 1:
General
1974 International Convention for the Safety of
Life at Sea (SOLAS): Consolidated edition
2009, Ch. II-1/D, Regulations 42, 43 and
IEC/IEEE 80005-3
Edition 1.0 2025-12
INTERNATIONAL
STANDARD
Utility connections in port -
Part 3: Low-voltage shore connection (LVSC) systems - General requirements
ICS 47.020.60 ISBN 978-2-8327- 0891-0
IEC/IEEE 80005-3:2025-12 (en)
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 General requirements. 11
4.1 System description . 11
4.2 Distribution system . 12
4.2.1 General. 12
4.2.2 Equipotential bonding . 13
4.3 Compatibility assessment before connection . 13
4.4 LVSC system design and operation . 13
4.4.1 System design . 13
4.4.2 System operation . 14
4.5 Personnel safety . 14
4.6 Design requirements . 14
4.6.1 General. 14
4.6.2 Protection against moisture and condensation . 14
4.6.3 Location and construction . 14
4.6.4 Electrical equipment in hazardous areas . 15
4.7 Electrical requirements . 15
4.8 System study and calculations . 16
4.9 Emergency shutdown including emergency-stop facilities . 16
5 LV shore supply system requirements . 17
5.1 Voltages and frequencies . 17
5.2 Quality of LV shore supply . 19
6 Shore-side installation . 19
6.1 General . 19
6.2 System component requirements. 19
6.2.1 Shore-side main circuit-breaker . 19
6.2.2 Shore power transformer . 20
6.2.3 System earthing methodology . 20
6.2.4 Protective earthing . 20
6.2.5 Equipotential bonding . 20
6.3 Shore-to-ship electrical protection system . 21
6.4 LV safety protocol, interlocking and communication . 22
6.4.1 General. 22
6.4.2 Operating of the low-voltage (LV) circuit-breakers and disconnectors . 22
6.5 Shore connection convertor equipment . 22
6.5.1 General. 22
6.5.2 Cooling . 23
6.5.3 Protection . 23
7 Ship-to-shore connection and interface equipment . 23
7.1 General . 23
7.2 Cable management system . 24
7.2.1 General. 24
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
7.2.2 Monitoring of cable tension or position . 25
7.2.3 Monitoring of the cable length . 25
7.3 Ship and shore couplers . 26
7.3.1 General. 26
7.3.2 Safety loop scheme . 27
7.3.3 Pilot contacts . 30
7.4 Ship-to-shore connection cable . 30
7.5 Storage . 30
8 Ship-side installation . 30
8.1 General . 30
8.2 Ship electrical distribution system. 30
8.2.1 Short-circuit protection . 30
8.2.2 Earth fault protection, monitoring and alarm . 30
8.2.3 Distribution system earthing . 31
8.3 Shore connection switchboard . 31
8.3.1 General. 31
8.3.2 Ship-side main circuit-breaker . 31
8.3.3 Instrumentation and protection . 31
8.3.4 Operation of the circuit-breaker . 32
8.4 Onboard transformer . 32
8.5 Onboard main switchboard . 33
8.5.1 General. 33
8.5.2 Circuit-breaker . 33
8.5.3 Instrumentation . 33
8.5.4 Protection . 34
8.5.5 Operation of the circuit-breaker . 35
8.6 Ship power restoration . 35
9 LVSC system control and monitoring . 35
9.1 General requirements. 35
9.2 Load transfer via blackout. 35
9.3 Load transfer via automatic synchronization . 36
9.3.1 General. 36
9.3.2 Protection requirements . 36
10 Verification and testing . 36
10.1 General . 36
10.2 Initial tests of shore-side installation . 37
10.2.1 General. 37
10.2.2 Tests . 37
10.3 Initial tests of ship-side installation . 37
10.3.1 General. 37
10.3.2 Tests . 37
10.4 Tests of the LVSC system at the first call . 38
10.4.1 General. 38
10.4.2 Tests . 38
11 Periodic tests and maintenance . 38
11.1 General . 38
11.2 Tests and verification of the LVSC system at repeated calls . 39
12 Documentation . 39
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
12.1 General . 39
12.2 System description . 39
Annex A (informative) Shore-to-ship connection cable . 40
A.1 General . 40
A.2 Rated voltage . 40
A.3 General design . 40
A.3.1 General. 40
A.3.2 Power and earth conductors . 40
A.3.3 Pilot elements . 41
A.3.4 Cabling . 41
A.3.5 Separator tape . 41
A.3.6 Outer sheath . 42
A.3.7 Markings . 42
A.4 Tests on complete cables . 42
Annex B (normative) Ship-to-shore cable management and connector . 44
B.1 General . 44
Bibliography . 46
Figure 1 – Block diagram of a typical LVSC system . 12
Figure 2 – Phase sequence rotation – Positive direction . 18
Figure 3 – Balanced three-phase variables in time domain. 18
Figure 4 – Shore connection accessories . 25
Figure 5 – Safety circuit . 28
Figure A.1 – Bending test arrangement . 43
Figure B.1 – Contact assignment . 44
Table 1 – Number of parallel connections with the use of IEC 60309-5. 26
Table B.1 – Connector types. 44
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
Utility connections in port -
Part 3: Low-voltage shore connection (LVSC) systems -
General requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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.
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental,
in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
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IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
9) Attention is drawn to the possibility that implementation of this IEC/ISO/IEEE Publication may require use of
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IEC/IEEE 80005-3 was prepared by IEC technical committee 18: Electrical installations of ships
and of mobile and fixed offshore units, in cooperation with
– IEC subcommittee 23H: Plugs, socket-outlets and couplers for industrial and similar
applications, and for electric vehicles, of IEC technical committee 23: Electrical accessories;
– ISO Technical Committee 8: Ships and marine technology, subcommittee 3: Piping and
machinery;
– IEEE IAS Petroleum and Chemical Industry Committee (PCIC) of the IEEE Industry
Applications Society.
This document is published as a triple logo (IEC, ISO and IEEE) standard.
This first edition cancels and replaces IEC PAS 80005-3:2014. This edition constitutes a
technical revision.
The text of this International Standard is based on the following IEC documents:
Draft Report on voting
18/1970/FDIS 18/1993A/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table. In ISO, the standard has been approved by 8 members out of 8 having a cast
vote.
The language used for the development of this International Standard is English.
This document was drafted in accordance with the rules given in the ISO/IEC Directives, Part 2,
available at www.iec.ch/members_experts/refdocs. The main document types developed by IEC
are described in greater detail at www.iec.ch/publications/.
A list of all the parts in the IEC 80005 series, published under the general title Utility connections
in port, can be found on the IEC website.
The IEC Technical Committee and IEEE Technical Committee have decided that the contents
of this document will remain unchanged until the stability date indicated on the IEC website
under webstore.iec.ch in the data related to the specific document. At this date, the document
will be
– reconfirmed,
– withdrawn, or
– revised.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
INTRODUCTION
For a variety of reasons, including environmental considerations, it is becoming an increasingly
common requirement for ships to shut down ship generators and to connect to shore power for
as long as practicable during stays in port.
The intention of this document is to define requirements that support, with the application of
suitable operating practices, efficiency and safety of connections by compliant ships to
compliant low-voltage shore power supplies through a compatible shore-to-ship connection.
With the support of sufficient planning, cooperation between ship and terminal facilities, and
appropriate operating procedures and assessment, compliance with the requirements of this
document is intended to allow different ships to connect to low-voltage shore connection (LVSC)
systems at different berths. This provides the benefits of standard, straightforward connection
without the need for adaptation and adjustment at different locations that can satisfy the
requirement to connect for as long as practicable during stays in port.
Ships that do not apply this document can find it impossible to connect to compliant shore
supplies.
In relation to the 1 MVA upper scope limitation of this document, ship types that fall under the
annexes of IEC/IEEE 80005-1 and require less than 1 MVA when connected to shore power
can be designed in accordance with IEC/IEEE 80005-1 with a high-voltage shore connection to
ensure interoperability.
Where deviations from the requirements and recommendations in this document are considered
for certain designs, it is important to highlight the potential effects on compatibility.
Where the requirements and recommendations of this document are complied with, low-voltage
shore supplies arrangements are likely to be compatible for visiting ships for connection.
Clauses 1 to 12 are intended for application to all LVSC systems. They intend to address mainly
the safety and effectiveness of LVSC systems with a minimum level of requirements that would
standardize on one solution.
This document includes the requirements to complete a detailed compatibility assessment for
ship and shore supply prior to a ship arriving to connect to a shore supply for the first time.
Annex A includes cabling recommendations that can be used in LVSC systems and contains
performance-based requirements for shore connection cables. Annex A was developed by
technical experts from several countries. IEC technical committee 18, subcommittee 18A and
IEC technical committee 20 were consulted regarding the cable requirements.
Annex B describes ship to shore cable management and connector to be used in LVSC systems.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
1 Scope
This document specifies provisions for the design, installation and testing of low-voltage shore
connection (LVSC) systems, onboard ships and on shore, to supply the ship with electrical
power from shore.
This document is applicable to:
– ships requiring up to 1 MVA while at berth;
– three-phase shore connection systems rated 250 A and above, and with a nominal voltage
rating of 400 V AC to 1 000 V AC;
– shore-side connection systems;
– shore-to-ship connection and interface equipment;
– transformers and reactors;
– semiconductor and rotating frequency convertors;
– ship-side connection systems;
– protection, control, monitoring, interlocking and power management systems.
This document does not apply to:
– inland navigation vessels;
– high-voltage shore connection systems, including ships built in accordance with the annexes
of IEC/IEEE 80005-1;
– the electrical power supply during docking periods, for example dry docking and other out-
of-service maintenance and repair;
– systems to be operated by ordinary persons as defined in 3.19.
NOTE 1 Other standards are available specifically for inland navigation vessels in Europe.
NOTE 2 IEC 60092-507 is applicable to small vessels.
NOTE 3 Additional or alternative requirements can be imposed by national administrations or the authorities within
whose jurisdiction the ship is intended to operate and by the owners or authorities responsible for a shore power
supply or distribution system.
NOTE 4 High-voltage shore connection systems are covered by IEC/IEEE 80005-1.
NOTE 5 Some existing 380 V AC ship systems can be supplied by 400 V AC.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034 (all parts), Rotating electrical machines
IEC 60079 (all parts), Explosive atmospheres
IEC 60092-101: Electrical installations in ships - Part 101: Definitions and general requirements
IEC 60092-201:2019, Electrical installations in ships - Part 201: System design - General
IEC 60092-301, Electrical installations in ships - Part 301: Equipment - Generators and motors
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
IEC 60092-302-2, Electrical installations in ships - Part 302-2: Low voltage switchgear and
controlgear assemblies - Marine power
IEC 60092-352, Electrical installations in ships - Part 352: Choice and installation of electrical
cables
IEC 60092-401, Electrical installations in ships - Part 401: Installation and test of completed
installation
IEC 60092-504:2016, Electrical installations in ships - Part 504: Automation, control and
instrumentation
IEC 60146 (all parts), Semiconductor convertors - General requirements and line commutated
convertors
IEC 60309-1, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes - Part 1: General requirements
IEC 60309-5:2017, Plugs, socket-outlets and couplers for industrial purposes - Part 5:
Dimensional compatibility and interchangeability requirements for plugs, socket-outlets, ship
connectors and ship inlets for low-voltage shore connection systems (LVSC)
IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test
for vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed
flame
IEC 60364 (all parts), Low-voltage electrical installations
IEC 60364-6, Low-voltage electrical installations - Part 6: Verification
IEC 60909 (all parts), Short-circuit currents in three-phase AC systems
IEC 60947-2, Low-voltage switchgear and controlgear - Part 2: Circuit-breakers
IEC 60947-5-1, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and
switching elements - Electromechanical control circuit devices
IEC 61363-1, Electrical installations of ships and mobile and fixed offshore units - Part 1:
Procedures for calculating short-circuit currents in three-phase a.c.
IEC 62477-1, Safety requirements for power electronic converter systems and equipment -
Part 1: General
International Convention for the Safety of Life at Sea (SOLAS):1974, Consolidated edition 2009,
Ch. II-1/D, Regulations 42, 43 and 45
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO, IEC and IEEE maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
– IEEE Standards Dictionary Online: available at http://dictionary.ieee.org
3.1
cable management system
CMS
all equipment designed to control, monitor and deliver the flexible cables, for power and control,
and their connection devices
3.2
shore plug and socket-outlet
means enabling the connection of a flexible cable to fixed wiring, consisting of a shore socket-
outlet and a shore plug
Note 1 to entry For use of shore plugs, shore socket-outlets, and ship couplers, see Figure 4.
3.3
shore socket-outlet
part intended to be installed with the fixed wiring (shore side) or incorporated in equipment
Note 1 to entry: See Figure 4.
3.4
shore plug
part intended to be attached directly to one flexible cable, and to be connected to the shore
socket-outlet
Note 1 to entry: See Figure 4.
3.5
ship coupler
means enabling the connection of a flexible cable to the ship, consisting of two parts: a ship
connector and ship inlet
Note 1 to entry: See Figure 4.
3.6
ship connector
part intended to be attached to one flexible cable connected to the supply, and to be connected
to the ship inlet
Note 1 to entry: See Figure 4.
3.7
ship inlet
part incorporated in, or fixed to, the ship
Note 1 to entry: See Figure 4.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
3.8
equipotential bonding
set of electric connections intended to achieve equipotentiality between conductive parts
[SOURCE: IEC 60050-195:2021, 195-01-10]
3.9
low-voltage
LV
set of voltage levels used for the distribution of electricity and whose upper limit is generally
accepted to be 1 000 V AC
[SOURCE: IEC 60050-601:1985, 601-01-26, modified – In the definition, "for alternating
current" has been replaced with "AC".]
3.10
person in charge
PIC
person or persons responsible for LVSC system operation
3.11
pilot contact
contact of the shore plug, ship inlet, shore socket-outlet and ship connector which signals
correct connection, and which is a safety-related component
3.12
receiving point
connection point of the flexible cable on the ship
3.13
safe
condition in which safety risks are minimized to an acceptable level
[SOURCE: IEC/IEEE 80005-1:2019, 3.12]
3.14
fail-safe
able to enter or remain in a safe state in the event of a failure
[SOURCE: IEC 60050-821:2017, 821-01-10]
3.15
isolated system
system in which no live part is intentionally earthed, except for high impedance connections for
protection or measurement purposes
[SOURCE: IEC 60050-195:2021, 195-04-07]
3.16
safety relay
device that will open the circuit even under single fault conditions
Note 1 to entry: This can be achieved by the series connection of two relays from different manufacturers or the
application of similar technology.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
3.17
safety circuit
normally closed interlocking circuit with pilot contacts and safety devices that shuts down the
LVSC system in response to specific initiating events
3.18
load
power consumed by the ship while connected to shore power supply
3.19
ordinary person
person who is neither a skilled person nor an instructed person
[SOURCE: IEC 60050-195:2021, 195-04-03]
3.20
system earthing
system grounding, US
functional earthing and protective earthing of an electric system
[SOURCE: IEC 60050-195:2021, 195-01-14]
3.21
alarm
prioritized system of notification
Note 1 to entry: For IMO definitions, see IMO Resolution A.1021(26) Code of Alarms and Indicators.
3.22
exposed conductive part
conductive part of equipment that can be touched and that is not live under normal conditions,
but that can become live when basic insulation fails
[SOURCE: IEC 60050-195:2021, 195-06-10]
4 General requirements
4.1 System description
A typical LVSC system in accordance with this document consists of hardware components as
shown in Figure 1.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
Key
1 shore supply system 8 control ship
2 shore-side transformer 9 ship protection relaying for ship-side main circuit-
breaker
3 shore-side protection relaying for shore-side main 10 ship-side shore connection switchboard with
circuit-breaker individual short-circuit current protection and
limiting device of each branch (see 4.8 and 8.3.3) to
be interlocked with ship-side main circuit-breaker
4 shore-side main circuit-breaker, see 6.2.1 11 ship-side main circuit-breaker.
5 shore-side current limiting branch circuit-breakers 12 onboard transformer (where applicable)
6 control shore 13 onboard main switchboard
7 shore-to-ship connection and interface equipment 14 shore connection switchboard
Figure 1 – Block diagram of a typical LVSC system
A device shown in the typical LVSC system block diagram may be omitted if its operational and
protective functions are provided by other devices (shown in Figure 1) and proven by
documentation and testing.
4.2 Distribution system
4.2.1 General
Typical distribution system requirements used on shore are given in IEC 60364-1. Typical ship
distribution systems requirements are given in IEC 60092-201.
NOTE IEEE Std 45™ provides additional information on typical ship distribution systems.
IEC/IEEE 80005-3:2025 © IEC/IEEE 2025
4.2.2 Equipotential bonding
An equipotential bonding between the ship’s hull and the shore earthing system shall be
provided and be established by the earthing contacts of the shore plug, shore socket-outlet,
ship connector and ship inlet.
Earthing conductors in ship-to-shore connectors shall be used as equipotential bonding
conductor. Metallic hull and saltwater conductivity shall not be used as the only me
...