File:Marine Engineer (1907) (14769282131).jpg

Identifier: marineengineer30londuoft (find matches)
Title: Marine Engineer
Year: 1907 (1900s)
Authors:
Subjects:
Publisher: London
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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s, between times of full load and times oflight load, the lamps and apparatus directly supplied fromthe bus bars would either be strained during the times oflight load, or would be giving a poor light during the timesof heavy load. It is possible to get over this difficulty evenwith comparatively large differences of pressure, by insertingresistances in the wires or cables supplying apparatus directlyfrom the bus bars, the resistance being inserted gradually, asthe pressure goes up; but there is the great objection tothis that it makes additional complication in the electricalengine-room. Those who have had the laying out of electriclighting and power plant on board ship have very wiselykept the apparatus as simple as possible ; and though withthe increased experience, and with increased general know-ledge of electricity now ruling, more and more complicationsmay safely be indulged in, it is still wise to keep the apparatusas simple as possible in matters of this kind. Space is always
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1 ),„ if the Switch board fixed on board the new Cunarder, Maurctania, by Messrs Ferranti, LtdThis board is principally devoted to one half of the distributing cables, or feeders. pr, ureal the bus bars would be only 103, the pressure at theterminals ol the lamps being still from 100 down to 9S volts.Providing that the amount of increased pressure at thebu bus given by this method is not serious, it makes a veryuseful and sim) method of solving the problem ; but iffferena ol ; ressure at the bus bars is considerable, M will mean that lamps or app: 1 thai in upplied tly Irom the bus bars, or by means of short cables fromthem, will be subject to too large variations. The lampsin the electrical engine-room itself, winch will be supplied, the bus bars, will be subject to the difference in ce itati 1 bj tins method. Thus, in the instano1 the difference in p a1 the bus bars would be volt, and would not affect the lamps or other appara-tus lied irei I them ; but if the cables had beencut d

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