Electric Lighting: A Practical Exposition of the Art, for the Use of Engineers, Students, and Others Interested in the Installation Or Operation of Electrical Plants, Том 2D. Van Nostrand Company, 1901 |
З цієї книги
Результати 11-15 із 100
Сторінка 102
... current trans- formers that are employed there . A description and ... alternating currents , usually two or three - phase , from the generating ... alternating cur- rents have been considered . CHAPTER VI . NETWORKS OF ELECTRICAL ...
... current trans- formers that are employed there . A description and ... alternating currents , usually two or three - phase , from the generating ... alternating cur- rents have been considered . CHAPTER VI . NETWORKS OF ELECTRICAL ...
Сторінка 109
... ALTERNATING CURRENTS . - Introduction . The various principles and facts concerning direct current distribution set forth in the preceding chapters , ap- ply also to alternating current systems . But in addition to the simple phenomena ...
... ALTERNATING CURRENTS . - Introduction . The various principles and facts concerning direct current distribution set forth in the preceding chapters , ap- ply also to alternating current systems . But in addition to the simple phenomena ...
Сторінка 110
... alternating current conductors with the great care that is required for direct current distribution , since the use of slightly larger conductors will make up for any small differences in the arrangement of the feeders and mains . The ...
... alternating current conductors with the great care that is required for direct current distribution , since the use of slightly larger conductors will make up for any small differences in the arrangement of the feeders and mains . The ...
Сторінка 111
... current to be generated at or transformed to a high pres- sure suitable for transmission over long distances with small con- ductors , the potential being locally transformed to that required by the lamps ... ALTERNATING CURRENTS . 111.
... current to be generated at or transformed to a high pres- sure suitable for transmission over long distances with small con- ductors , the potential being locally transformed to that required by the lamps ... ALTERNATING CURRENTS . 111.
Сторінка 113
... current wave is also a sine - curve , a similar expression gives the instantaneous value as follows : i = Imax sin 0 . ( 33 ) The sine - wave being the ideal form , practically all calculations are based upon ... ALTERNATING CURRENTS . 113.
... current wave is also a sine - curve , a similar expression gives the instantaneous value as follows : i = Imax sin 0 . ( 33 ) The sine - wave being the ideal form , practically all calculations are based upon ... ALTERNATING CURRENTS . 113.
Інші видання - Показати все
Electric Lighting: A Practical Exposition of the Art, for the Use of ... Francis Bacon Crocker Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
alternating current amperes apparatus arc lamps armature arrangement bulb bus bars cable candle-power capacity carbon cent conductors conduit connected constant current constant potential copper loss core cross-arm cross-section cut-out device diameter difference direct current distribution drop dynamo effect efficiency electric lighting electrical conductors employed energy equal fact feeders feeding-points filament flow frequency full load fuse globe ground heat hence incandescent lamps inch inclosed arc increase inductance insulation iron joint latter length less machines magnetic maximum mechanical metal meter method motor number of lamps ohms one-half operation ordinary parallel phase pipe placed pole polyphase polyphase systems porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit secondary coils shown in Fig shunt side single-phase socket supplied switch temperature terminal three-phase three-wire system tion transformers tube two-phase two-wire two-wire circuit usually voltage volts wattmeter watts winding
Популярні уривки
Сторінка 460 - The lower limit is specified for rubber-covered wires to prevent gradual deterioration of the high insulations by the heat of the wires, but not from fear of igniting the insulation. The question of drop is not taken into consideration in the above tables.
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 459 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.