Section 4 Particulars to be submitted

4.1.1 Unless advised otherwise, it is the responsibility of the system integrator to agree the scope, functional requirements and boundary interfaces for the power distribution system with the Owner and to prepare and submit the information required by this Section to LR.

4.1.2 During the life of the vessel, details of any proposed changes that affect the safe and reliable operation of the power distribution system are to be submitted to LR for approval.

4.1.3 The information required by this Section is in addition to the information required to be submitted in Pt 6, Ch 1 Control Engineering Systems and Pt 6, Ch 2 Electrical Engineering of the Rules for Ships. Where considered necessary by LR, additional documentation may be requested.

4.1.4 The following is to be read in conjunction with Pt 5 Main and Auxiliary Machinery and Pt 6 Control, Electrical, Refrigeration and Fire of the Rules for Ships.

4.2.1 A Risk Assessment is to be carried out by suitably qualified and experienced individuals to a recognised Standard (e.g. as outlined in ISO 31010, Risk management – Risk assessment techniques) and follow the guidance given in LR’s ShipRight Procedure Assessment of Risk Based Designs (ARBD). The Risk Assessment shall include as a minimum, but not limited to:

1. all normal and reasonably foreseeable abnormal operating conditions, such as start-up, normal shutdown, non-use, and protection;

2. physical equipment layout, arrangements and location;

3. mechanical, electrical and human failures as a result of: short circuit, earth fault, fire, flooding, cooling failure and operation outside of the designed operating parameters;

4. software development and integrity;

5. system electrical protection philosophy; and

6. indicators and alerts.

4.2.2 The information stated in Ch 1, 4.3 Functional description is to be derived from the Risk Assessment and is to be submitted to LR as applicable.

4.3.1 A functional description of the electrical distribution systems and equipment that details compliance with the performance criteria and system capability and functionality under defined normal and reasonably foreseeable abnormal conditions including, but not limited to:

1. any degraded modes of operation;

2. load management and load sharing philosophy;

3. earthing philosophy;

4. system electrical protection philosophy;

5. system stability; and

6. converter switching actions.

4.3.2 The arrangements for electrical generation equipment for the vessel are to be agreed between the designer and the Owner/Operator and are to be included in the functional description.

4.4.1 Plans showing electrical distribution systems and equipment, installation guidance, system interface specification, control systems, safeguards and electrical systems covered by this Chapter. Plans are to show system and component design parameters, design justification, system interfaces, and availability, reliability and maintainability information.

4.4.2 Information regarding the expected resistance, inductance and capacitance in the system and the installed components is to be provided as part of the short-circuit calculation and discrimination study as required by Pt 6, Ch 2, 1.2 Documentation required for design review 1.2.6 of the Rules for Ships. See also Ch 1, 5.6 Protection against shortcircuit. The values chosen are to be based upon the component tolerances which will cause the highest fault currents or highest arc flash energy to be generated.

4.5.1 Plans showing the general arrangement of the major items of equipment within compartments, together with a description of the equipment and arrangements installed for isolation and distribution of the electrical power supply systems. The plans are to indicate segregation and redundancy arrangements throughout the vessel.

4.6.1  4.6.1 A schedule of testing and trials to demonstrate that systems are capable of operating as described in the functional description.

4.7.1 Operating manuals are to be provided on board and submitted for information where requested by LR. The manuals are to include the following information:

1. Particulars and a description of the systems.

2. Operating instructions for the equipment and systems (including fire isolation aspects).

3. Maintenance instructions for the installed arrangements, including, but not limited to: procedures to prevent injury from electric shock and arc flash;

4. Software configuration management procedures which are to include a list of all versions of the software installed in the system, and the settings, values of system or equipment specific configuration parameters.