Regulation 23 - Special requirements for machinery, boiler and electrical installations
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Regulation 23 - Special requirements for machinery, boiler and electrical installations

  (1) In vessels of 75 m in length and over the main source of electrical power shall be supplied as follows:

  • (a) where the electrical power can normally be supplied by one generator, there shall be provided suitable load shedding arrangements to ensure the integrity of supplies to services required for propulsion and steering. To cover the case of loss of the generator in operation, there shall be adequate provisions for automatic starting and connecting to the main switchboard of a stand-by generator of sufficient capacity to permit propulsion and steering and with automatic restarting of the essential auxiliaries including, where necessary, sequential operations. Means may be provided to the satisfaction of the Administration for remote (manual) starting and connection of the stand-by generator to the main switchboard as well as means of repeated remote starting of essential auxiliaries; and

  • (b) if the electrical power is normally supplied by more than one generating set simultaneously, there shall be provisions, e.g. by load shedding, to ensure that in case of loss of one of these generating sets, the remaining ones are kept in operation without overload to permit propulsion and steering.

  (2) Where required to be duplicated, other auxiliary machinery essential to propulsion shall be fitted with automatic change-over devices allowing transfer to a stand-by machine. An alarm shall be given on automatic change-over.

  (3) Automatic control and alarm systems shall be provided as follows:

  • (a) the control system shall be such that through the necessary automatic arrangements the services needed for the operation of the main propulsion machinery and its auxiliaries are ensured;

  • (b) means shall be provided to keep the starting air pressure at the required level where internal combustion engines are used for main propulsion;

  • (c) an alarm system complying with regulation 22 shall be provided for all important pressures, temperatures, fluid levels, etc.; and

  • (d) where appropriate an adequate central position shall be arranged with the necessary alarm panels and instrumentation indicating any alarmed fault.

Parent topic: Part D - Periodically Unattended Machinery Spaces (See also regulation 3 )
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