Answer Happy

a) Using a simple, clearly labelled Electrical Distribution diagram, show a typical arrangement of a small general cargo ship 440V/220V electrical power system. Your diagram should clearly identify the electrical safety arrangements incorporated into the system. [10 marks) b) Describe the two alternative manual methods that can be used to synchronise an incoming 3-phase A.C. generator to a system of busbars already supplying an electrical load. Identify all of the conditions that need to be satisfied to complete the process safely. [6 marks) c) Once successfully connected to the busbars, the generator in part (b) needs to share the connected load with the previously existing generator(s). Briefly describe how this is achieved. [4 marks) d) A220V diesel-driven emergency generator is required to supply the following on full load: lighting load comprising one hundred, 100W and two hundred, 60W lamps, • Machinery loads of 25kW, Navigational equipment loads which draw a current of 30A. • 0 (11) Calculate the maximum power demand, Assuming a generator efficiency of 85%, calculate the required power output of the diesel engine when the generator supplies all the loads at the same time (1 decimal place).