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发表于 2015-12-16 20:13
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来自： 中国北京
Shedding Arrangements
9.9.1 Provision for Load Shedding Arrangements (2004)
In association with the provision of 4-8-2/3.11, and in order to safeguard continuity of the electrical power supply, automatic load-shedding arrangements or other equivalent arrangements are to be provided:
i) Where only one generating set is normally used to supply power for propulsion and steering of the vessel, and a possibility exists that due to the switching on of additional loads, whether manually or automatically initiated, the total load exceeds the rated capacity of the running generator, or
ii) Where electrical power is normally supplied by more than one generator set simultaneously in parallel operation for propulsion and steering of the vessel, upon the failure of one of the parallel running generators, the total connected load exceeds the total capacity of the remaining generator(s).
9.9.2 Services not Allowed for Shedding (2004)
Automatic load-shedding arrangements or other equivalent arrangements are not to automatically disconnect the following services. See 4-8-1/7.3.3 for the definition of essential services.
i) Primary essential services that, when disconnected, will cause immediate disruption to propulsion and maneuvering of the vessel,
ii) Emergency services as listed in 4-8-2/5.5, and
iii) Secondary essential services that, when disconnected, will:
• cause immediate disruption of systems required for safety and navigation of the vessel, such as:
Lighting systems,
Navigation lights, aids and signals,
Internal communication systems required by 4-8-2/11.5, etc.
• prevent services necessary for safety from being immediately reconnected when the power supply is restored to its normal operating conditions, such as:
Fire pumps, and other fire extinguishing medium pumps,
Bilge pumps,
Ventilation fans for engine and boiler rooms. |
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