Distributing system and lampsD. Van Nostrand Company, 1906 |
Загальні терміни та фрази
alternating current amperes apparatus arc lamps armature arrangement brushes bus bars cable candle-power capacity carbon cent conductors connected constant current constant potential copper loss core loss cross-arms cross-section curve device diameter difference direct current distribution dynamo effect efficiency electric lighting employed energy equal fact feeding-points field filament flow frequency full load fuse ground group of lamps heat hence incandescent lamps inch increase inductance insulation iron latter less lines machines magnetic mains maximum meter method motor neutral wire number of lamps ohms one-half operated ordinary overhead lines parallel phase pipe placed pole polyphase polyphase systems power factor practically pressure reactance reduced represented in Fig resistance rheostat rotary rotary converters secondary circuit secondary coils self-induction shown in Fig shunt side single-phase supplied switch temperature three-phase three-wire system tion trans transformers tube two-phase two-wire two-wire circuit usually voltage volts VOLTS DROP watts weight of copper winding
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Сторінка 11 - W, we find that the most economical area of conductor is that for which the annual cost of energy wasted is equal to the annual interest on that portion of the capital outlay which can be considered to be proportional to the weight of metal used. Professor George Forbes, in his Cantor Lecture, on " The Distribution of Electricity...
Сторінка 466 - Economy and compensator coils for arc lamps must be mounted on non-combustible, non-absorptive insulating supports, such as glass or porcelain, allowing an air space of at least one inch between frame and support, and in general to be treated like sources of heat.