The Electricians Pocket book the English Edition of Hospitaliers Formulaire
The Electricians Pocket book the English Edition of Hospitaliers Formulaire
Douard Hospitalier
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The work expended in driving a mecha- nical generator of electricity is measured either by a transmission dynamometer or by diagrams taken from the prime mover, taking into account the loss of work due to the friction in the prime mover itself. The work expended in driving a mechanical generator of electricity determines the choice of the prime mover which is to drive it. The power of electric generators varies from a few hundred kilogrammetres up to 400 horse -power. Total electrical energy pr...oduced. Let E be the e. M. F. Developed by a generator, and C the strength of the current in its normal conditions of working. The total electrical energy Wt produced is : CE "Wt kgm. Per second ; y "oi or CE r. CE v W t -r- - horse-power =. Chevaux-vapeur. 74:0 lob The difference between the total electrical energy produced and the work expended represents losses due to friction, passive resistances, and complex secondary reactions, which are produced between the field magnets and the armature of the generators.
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