Section 7 Electrical systems
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 12 Propulsion Devices - Chapter 3 Thrusters - Section 7 Electrical systems

Section 7 Electrical systems

Parent topic: Chapter 3 Thrusters

7.1 General

7.1.1 The electrical installation is to be designed, constructed and installed in accordance with the requirements of Pt 16 Control and Electrical Engineering.

7.2 Emergency power for steering systems and drives

7.2.1 For high speed craft, in the event of total power failure, either:

  1. emergency power for steering systems/drives is to be restored automatically within five seconds. To achieve this an interim fast acting system may be required to come into operation until such time as the auxiliary/emergency power source comes on line. (Note: starting arrangements are to comply with the requirements relating to starting arrangements of emergency generators), or

  2. means are to be provided to bring the craft to a safe condition.

7.3 Circuits

7.3.1 Azimuth thruster auxiliaries and controls are to be served by individual circuits. Services that are duplicated are to be separated throughout their length as widely as is practicable and without the use of common feeders, transformers, converters, protective devices or control circuits.

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