IEC/IEEE 80005-3:2025

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

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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
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
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

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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from ISO or the IEEE Standards Association.
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.
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.

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 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
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.
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.
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.
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.
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 means for
equipotential bonding.
Equipotential bonding between ship hull and the earthing system on shore shall be periodically
checked (see 11.2). A single earth fault shall not create a step or touch voltage exceeding 25 V
at any location in the shore-to-ship power system.
NOTE The use of equipotential bonding as protection against electric shock is defined in IEC 61140.
4.3 Compatibility assessment before connection
Compatibility assessment shall be performed to verify the possibility to connect the ship-to-
shore LVSC supply. Compatibility assessment shall be performed prior to the first arrival at a
terminal.
Assessment of compatibility shall be performed to determine:
a) compliance with the requirements of this document and any deviations from the
recommendations;
b) minimum and maximum prospective short-circuit current (see 4.7 and 4.8);
c) nominal ratings of the shore supply, ship-to-shore connection and ship connection (see 5.1);
d) acceptable voltage variations at ship switchboards between no-load and nominal rating
(see 5.2);
e) steady-state and transient ship load demand when connected to an LV shore supply;
f) LV shore supply response to step changes in load (see 5.2);
g) system study and calculations (see 4.8);
h) compatibility of shore and ship earth fault protection, monitoring and alarms (see 8.2.2);
i) sufficient cable length;
j) compatibility of safety circuits;
k) consideration of hazardous areas, where applicable (see 4.6.4);
l) when a LV supply system is connected, the necessity to provide means to reduce inrush
current, inhibit the starting of large loads that would result in failure, overloading or
activation of automatic load reduction measures. Means to limit inrush current, see 8.4;
m) electrochemical corrosion due to equipotential bonding;
n) utility company requirements for load transfer parallel connection, see 9.3;
o) compatibility of communication, where applicable;
p) that design variations are verified and meet the same safety and functional requirements;
q) total harmonic distortion (THD) (See 5.2).
4.4 LVSC system design and operation
4.4.1 System design
The design and construction shall be coordinated among the parties responsible for shore and
ship LVSC systems.
4.4.2 System operation
During the operation of LVSC systems, the person in charge (PIC) shall be identified at the
shore facility and onboard the ship for the purpose of communication.
The PIC shall be provided with sufficient information, instructions, tools and other resources for
safety and efficiency of these activities.
An independent means of voice communication should be provided between the PIC on the
ship and shore facility (e.g. two-way radios).
Upon signed agreement between port and ship, one PIC may be responsible for both ship and
shore LVSC operations. System operation of shore and ship LVSC systems shall be in
accordance with a defined procedure identifying the roles, responsibilities and requirements of
all parties involved.
4.5 Personnel safety
Construction of the LV equipment and operating safety procedures shall provide for the safety
of personnel during the establishment of the connection of the ship supply, during all normal
operations, in the event of a failure, during disconnection and when not in use.
NOTE The use of the term "safe" is not intended to suggest or guarantee that absolute safety can be achieved in
any situation or by compliance with the recommended practices set forth herein. The use of terms such as "safe",
"electrically safe work practices", "safe work condition", "safe work environment", "safe design", "safe distance",
"safe work method", "safe work area", "safe use" describe practices, conditions, etc. in which safety risks are
minimized but not eliminated absolutely, such that safety is not guaranteed.
4.6 Design requirements
4.6.1 General
Protection and safety systems shall be designed based on the fail-safe principle.
Suitable warning notices shall be provided at locations along connection equipment routes
including connection locations.
4.6.2 Protection against moisture and condensation
Effective means shall be provided to prevent accumulation of moisture and condensation, even
if equipment is idle for appreciable periods.
4.6.3 Location and construction
LVSC equipment shall be installed in access-controlled spaces.
All equipment shall be suitable for the environmental conditions of the spaces where it is
intended to operate. Ship equipment shall comply with the applicable requirements of
IEC 60092-101.
Equipment location is critical to the safety and efficiency of operation of the ship's cargo and
mooring systems. When determining the location of the LVSC system, the full range of cargo,
bunkering and other utility operations shall be considered, including:
a) the cargo handling and mooring equipment in use on the ship and shore, and the areas that
shall be clear for their operation, along with any movement of the ship along the pier required
to accommodate these operations;
b) traffic management considerations such that the use of an LVSC system does not interfere
with other ships' operations (including mooring) or prevent necessary traffic flow on the pier
and to maintain open fire lanes where required; and
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