Electrical Installations of Electric Light, Power, Traction and Industrial Electrical Machinery, Vol. 4 (Classic Reprint) - Tapa dura

Excerpt from Electrical Installations of Electric Light, Power, Traction and Industrial Electrical Machinery, Vol. 4

This volume discusses the more complete installations for electric light and power transmission. With the exceptions Of electrolytic and electro - thermal installations, electricity acts merely as a carrier or transmitter Of the power Of prime movers to some work to be done: and hence so long as the method for the production Of electrical energy from fuel is the only commercially successful one, the prime mover remains the most important element in the complex system. Its economy in fuel, and also the nature Of the fuel it can utilise, is the engineer's chief concern; hence installations from the engineer's point Of view are discussed under the classification to which their fuel belongs. It is a secondary question whether the installation supplies the energy as a continuous current or as alter nating currents. It is necessary, however, to notice the cases in which the one has more advantages than the Other, for neither is universally applicable.

The importance Of the transmission Of power in works from prime mover to machines cannot be too strongly impressed. It is not merely by the substitution Of a prime mover by an electro-motor that much advantage is to be gained, but by the abolition Of shaft ing, pulleys, belting, and gear wheels for transmitting the power; these have their legitimate functions in the machines to which electro-motors are attached, the power being distributed among the machines by electric conductors. This being impressed upon power users, they can readily realise the true position and functions Of the dynamo-electric machine and electric-motor in an installation.

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