Section 3 Electrical connection

3.1.1 A connection cubicle is to be provided at a convenient location for the reception or extension of connection cable(s) for connection to the external electrical power supply connection points. The connection cubicle is to contain terminals for the connection cable(s) that can be isolated.

3.1.2 Power connections with external electrical power supply arrangements may be made with either suitable connections or by using socket-outlets and plugs in accordance with Pt 7, Ch 13, 3.3 Connection cables, plugs and socket-outlets.

3.1.3 Suitable cables, permanently fixed, are to be provided from the connection cubicle to the Connection Circuit-Breaker switchboard, with on-board overcurrent protection situated at or as close as is practicable to the connection cubicle. Connection Equipment to this overcurrent protection is to be installed in a manner such as to minimise the risk of short-circuit.

3.1.4 Where shipboard connection cables are extended to the external electrical power supply connection points, the connection cubicle is to be situated as close as practicable on board to the point where they are extended from the ship.

3.1.5 Means are to be provided to permit the quality of insulation between Connection Equipment conductors, and between the conductors and earth to be measured to verify suitability prior to the connection of an external power supply. The means of verifying satisfactory insulation quality of Connection Equipment in hazardous areas is to be addressed in the Operating Manuals, see Pt 7, Ch 13, 1.4 Plans and information 1.4.2.

3.1.6 An earth connection is to be provided for connecting the hull to an earth appropriate for the external electrical power supply which is being connected.

3.1.7 For high voltage connections, means are to be provided, as applicable to the design, to either:

1. permit termination of circuits used by external power supply equipment to monitor the continuity of the earth connection referred to in Pt 7, Ch 13, 3.1 General 3.1.6; or

2. monitor the continuity of the earth connection referred to in Pt 7, Ch 13, 3.1 General 3.1.6, see Pt 7, Ch 13, 5.3 Emergency shutdown 5.3.8.

3.1.8 Means are to be provided for checking the phase sequence of the incoming supply.

3.1.9 An indicator is to be provided at the Connection Circuit-Breaker switchboard, and at the connection cubicle if in a different location, in order to show when connections are energised.

3.1.10 Requirements for an external electrical power supply to be connected are to be defined in the Design Statement and this is to detail the following:

• connections, including control, alarm and safety systems and data communication links;
• Emergency Shutdown requirements, see Pt 7, Ch 13, 5.3 Emergency shutdown;
• nominal voltage(s) or voltage range;
• nominal frequency or frequency range;
• number of phases and system of supply;
• rated current or apparent power;
• quality of power supply;
• reference to protection system design, including protection characteristics for the Connection Circuit-Breaker;
• maximum permitted prospective fault level;
• minimum supply apparent power or current capacity;
• earth fault limiting requirements for earthed high voltage connections;
• isolation and earthing; and
• supply requirements for lightning and surge protection, galvanic isolation of supply circuit from other ships, etc.

Required electrical characteristics are to address steady state, transient and fault conditions, as necessary.

3.1.11 A notice is to be provided at the connection cubicle referencing the Operating Manuals and Design Statement and advising of the requirement to ensure that external electrical power supplies satisfy the requirements of Pt 7, Ch 13, 3.1 General 3.1.10 prior to connection. See Pt 7, Ch 13, 1.1 General 1.1.4 for the conducting of the assessment of overall compatibility.

3.2.1 Connection Equipment support and management arrangements, including those for control engineering arrangements, are to be arranged not to apply damaging forces or tension to correctly applied equipment. Support arrangements are to ensure that the weight of connected cable is not borne by cable end terminations or connections, including those in plugs or socket-outlets.

3.2.2 Connection Equipment arrangements are to be such as not to coil or twist correctly applied equipment in a manner that would result in heating or physical tension beyond its rating during Defined Operations.

3.2.3 Where Connection Equipment passes through support or management arrangements or structural openings or is placed against structures, it is to be suitably protected against damage having regard to the Defined Operations.

3.2.4 Connection Equipment routes are not to reduce the effectiveness of openings required for the safety of the ship, for instance bulkhead or deck penetrations, watertight or fire doors.

3.2.5 Connection Equipment support and management arrangements are to be able to operate satisfactorily without damage during the Defined Operations.

3.2.6 Means are to be provided for Connection Equipment to be readily and safely adjusted in response to tidal changes, and other movements that could lead to damage or failure of connections, during the Defined Operations.

3.2.7 Connections with external electrical power supply arrangements are to be designed to prevent damage to the ship structure or Connection Equipment cable reels, cranes and/or gantries as a result of the connections separating in the event of the ship leaving a berth inadvertently or as a result of high cable tension for other reasons. Evidence of compliance with this requirement is to be included in the submission required by Pt 7, Ch 13, 1.4 Plans and information 1.4.3 and is to identify Connection Equipment (weak points) that will be damaged, if any, in the event of separation. Damage to connection cables, plugs and socket outlets or other identified equipment may be considered.

3.2.8 Connection Equipment cable reels, cranes and/or gantries used to manage, handle or adjust connection cables, plugs and/or socket-outlets, are to be designed and manufactured in accordance with applicable LR Rules or a marine standard acceptable to LR. A manufacturer's certificate verifying suitability for safe and effective operation for the Defined Operations and service profile is to be submitted.

3.2.9 The manufacturer's certificate referred to in Pt 7, Ch 13, 3.2 Connection equipment 3.2.8 is to be in the English language and include the following information:

1. Design and manufacturing standard(s) used.

2. Materials used for construction of key components and their sources.

3. Details of the quality control system applied during design, manufacture and testing.

4. Details of any existing type approval or type testing.

5. Details of installation and testing recommendations.

The manufacturer is to have a recognised quality management system certified by an IACS member or a Notified Body.

3.2.10 Connection cubicle and connection equipment locations are to have warning notices placed in prominent positions to indicate the presence of moving equipment, electricity and high voltage as applicable.

3.2.11 Effective means are to be provided to prevent the accumulation of moisture and condensation within equipment enclosures. Failure of heaters and/or ventilation fans provided to satisfy this requirement is to activate an alarm at a machinery control station that is attended while connected to an external power supply. The installation of open deck enclosures for high voltage connections is to be minimised to that required for the Defined Operations; a technical justification, including proposed degree of protection ratings, is to be included in the submission required by Pt 7, Ch 13, 1.4 Plans and information 1.4.8.

3.2.12 Connection Equipment support and management arrangements are to ensure that the correctly applied equipment is kept clear of areas where they may be exposed to moisture or temperatures outside their rating.

3.2.13 Arrangements are to be provided for stowage of on-board equipment when not in use such that equipment:

• will not be exposed to environmental conditions outside its rating;
• can be stowed, stored and removed without damage; and
• does not present a hazard during normal ship operation.

Adapters, extensions and parts dismantled after use are also to be provided with stowage arrangements.

3.3.1 Plugs and socket-outlets for external electrical power supply connection points, including those for external control engineering arrangements, are to be designed constructed and tested in accordance with IEC 62613-1: Plugs, socket-outlets and ship couplers for high-voltage shore connection systems (HVSC Systems) – Part 1: General requirements or a relevant National Standard.

3.3.2 Plugs are to conform to applicable requirements that ensure compatibility with the intended socket-outlet type. Compatible plugs and socket-outlets are to be in accordance with IEC 62613-2: Plugs, socket-outlets and ship couplers for high-voltage shore connection systems (HVSC-Systems) – Part 2: Dimensional compatibility and interchangeability requirements for accessories to be used by various types of ships or a relevant National Standard.

3.3.3 Type tests are to be carried out on power connection plugs and socket-outlets and cables, in accordance with IEC 62613-1: Plugs, socket-outlets and ship couplers for high-voltage shore connection systems (HVSC Systems) – Part 1: General requirements: and Annex A.3 of the IEC/ISO/IEEE 80005-1: Utility connection in port — High voltage shore connection (HVSC) Systems-General requirements High voltage shore connection systems or a relevant National Standard, to verify design suitability for the intended application described in the Design Statement. Type test reports are to be submitted that include details of the standards, the tests conducted, and their order and the acceptance criteria. Alternative proposals may be submitted for consideration.

3.3.4 Power connection plugs and socket-outlets are to be assigned with ratings based on testing in accordance with IEC 62613-1: Plugs, socket-outlets and ship couplers for high-voltage shore connection systems (HVSC Systems) – Part 1: General requirements or a relevant National Standard. Details are to be provided in the submission required by Pt 7, Ch 13, 1.4 Plans and information 1.4.5.

3.3.5 Power connection plugs and socket-outlets are to be located to minimise the potential of arc flash hazards and suitable warning notices are to be provided at locations along Connection Equipment routes, including power connection plugs and socket-outlets operational locations.

3.3.6 Connection Equipment power cables are to be Type Approved in accordance with LR’s Type Approval System Test Specification Number 3 or, alternatively, surveyed by the Surveyors during manufacture and testing to assess compliance with Pt 7, Ch 13, 3.3 Connection cables, plugs and socket-outlets 3.3.3 and application of an acceptable quality management system, see also Pt 6, Ch 2, 1.4 Surveys 1.4.6. Connection equipment cables are to be installed so as to minimise the risk of short-circuit when correctly applied.

3.3.7 Ship-to-shore connection cables are to be in compliance with IEC 80005-1 Utility connections in port — Part 1: High voltage shore connection (HVSC) systems — General requirements Annex A.

3.4.1 Connection Equipment installed in removable containers is to satisfy the additional requirements of this sub- Section.

3.4.2 Containers are to be for the ship’s exclusive use and are to be provided with a permanent notice indicating the ship name and IMO Ship Number.

3.4.3 Container locations are to be designated and identified in the plans required by Pt 7, Ch 13, 1.4 Plans and information 1.4.4 and provided with fixings that are suitable for the Defined Operations. Procedures for container fixing, use and movement are to be included in the Operating Manuals.

3.4.4 The container type is to be a steel, closed type, weatherproof construction sufficient to prevent damage during expected use, for example during loading and unloading.

3.4.5 Measures necessary to prevent movement of the container when the container has electrical cables connected are to be provided.

3.4.6 Suitable protection is to be provided to prevent damage to Connection Equipment at the container entry points.

3.4.7 Suitable safe access is to be provided to the container for the Defined Operations, inspection and maintenance.

3.4.8 Container entry points are to be provided with suitable sealing arrangements to prevent the ingress of water into the container.

3.4.9 Containers are to be provided with effective means of ventilation. Where a container ventilation fan is provided, alarms are to be provided in accordance with Pt 7, Ch 13, 3.2 Connection equipment 3.2.11.

3.5.1 A formal written detail of isolations and earthing in the form of permit to work is to be completed prior to the vessel arriving at the berth to receive. This is to ensure that the correct shore connection point is ready to receive shore power and the unused shore connection point, if fitted, will not be energized when shore power is connect to the vessel potentially causing an electrical hazard to personnel. A copy of a permit to work form can be found at Annex C of IEC 60092-509 Operation of electric installations.

3.5.2 The Defined Operations are, as far as is practical, not to require personnel to be in the vicinity of high voltage equipment when it is energised.

3.5.3 For high voltage:

1. switchgear and controlgear assemblies;

2. cable reels, cranes and gantries; and

3. mounting enclosures for socket-outlets used to connect flexible cables to fixed connections,

arrangements are to be made to protect personnel in the event of gases, arc flash or vapours escaping under pressure as the result of arcing due to an internal fault. Where the Defined Operations require personnel to be in the vicinity of such equipment when it is energised, this may be achieved by an assembly that has been tested in accordance with Annex AA of IEC 62271-200 High-voltage switchgear and controlgear — Part 100: High-voltage alternating-current circuit-breakers and qualified for classification IAC (internal arc classification), or equivalent.