Section 2 Performance requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 9 Electrotechnical Systems - Chapter 3 Electrical Power Distribution and Equipment - Section 2 Performance requirements

Section 2 Performance requirements

Parent topic: Chapter 3 Electrical Power Distribution and Equipment

2.1 Performance requirements

2.1.1 Electrical equipment is to be suitable for the quality of electrical power supply encountered on board.

2.1.2 Electrical equipment and distribution systems are to meet the requirements of Vol 2, Pt 9, Ch 4 Electrical Protection.

2.1.3 The electrical system voltages and frequencies shall be selected to ensure safe provision of electrical power to systems and to minimise the risk of exposure to personnel.

2.1.4 The design of the type and configuration of the distribution system is to consider earthing arrangements to minimise the risk to personnel and equipment under normal and foreseeable abnormal conditions.

2.1.5 The number, size, installation and arrangement of electrical switchboards and distribution centres shall be suitable for the functional requirements of the vessel.

2.1.6 The design of the electrical distribution system is to ensure that a single point of failure will not result in unavailability of both main and emergency sources of electrical power.

2.1.7 Cables shall be installed such that risk of injury to personnel or damage to the system is minimised when equipment is operating in foreseeable conditions or under reasonable foreseeable abnormal conditions.

2.1.8 Where a single consumer requires a main and emergency supply of electrical power, they shall be separated as widely as is practicable.

2.1.9 The continuity of supply to services that are essential for safety in an emergency shall be ensured under all normal and reasonably foreseeable abnormal conditions.

2.1.10 The continuity of supply to Mobility and/or Ship Type systems is to be ensured under normal operation and defined abnormal conditions.

2.1.11 Suitable arrangements for the isolation and switching of distribution circuits shall be provided.

2.1.12 Installation of cables shall not cause mutual interference between systems.

2.1.13 A means to detect insulation breakdown with respect to earth within equipment and distribution systems and to alert the Operator shall be provided.

2.1.14 Cables shall be installed such that risk of injury to personnel or damage to the system is minimised when equipment is operating in foreseeable or under fault conditions.

2.1.15 Exposed metal parts of electrical machines or equipment which are not intended to be live but which may become live under fault conditions shall be earthed.

2.1.16 Essential safety functions shall be supplied using fire-resistant cable.

2.1.17 Electrical equipment and distribution systems shall be suitably protected from mechanical damage.

2.1.18 Alternative arrangements for cooling of Mobility and/or Ship Type systems in the event of a forced cooling system failure shall be provided.

2.1.19 Personnel, equipment and platform are to be protected from the risk of static electricity.

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