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 |
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Сторінка 22
... coil windings , connected to a corresponding number of commutators . The cir- cuit leads through these windings in series , so that the construc- tion may be regarded as equivalent to several armatures in series . P + 3000 C 2000 A B0 ...
... coil windings , connected to a corresponding number of commutators . The cir- cuit leads through these windings in series , so that the construc- tion may be regarded as equivalent to several armatures in series . P + 3000 C 2000 A B0 ...
Сторінка 54
... coil B leads . It is a common practice to mechanically join D , E , and F by a cross - bar so that they move together and form a three - pole switch . In such cases , when a dynamo is about to be connected to the cir- cuit , the ...
... coil B leads . It is a common practice to mechanically join D , E , and F by a cross - bar so that they move together and form a three - pole switch . In such cases , when a dynamo is about to be connected to the cir- cuit , the ...
Сторінка 55
... coil B , which tends to still further increase the voltage of this dynamo , at the same time tak- ing current away from the series coils of the other machines , and thereby reducing their potential . The shifting of load thus pro- duced ...
... coil B , which tends to still further increase the voltage of this dynamo , at the same time tak- ing current away from the series coils of the other machines , and thereby reducing their potential . The shifting of load thus pro- duced ...
Сторінка 56
... coil B ; or the switches D and E might happen to be closed with F open , in which event the series coil would not be in circuit , and the dynamo could not generate sufficient voltage when the load increased . Compound or over - compound ...
... coil B ; or the switches D and E might happen to be closed with F open , in which event the series coil would not be in circuit , and the dynamo could not generate sufficient voltage when the load increased . Compound or over - compound ...
Сторінка 57
... coils and resistances in shunt and com- pound dynamos , as well as hysteresis in the magnets , also cause variations in the voltage which usually have to be overcome by hand regulation . Automatic Constant - Potential Regulators . To ...
... coils and resistances in shunt and com- pound dynamos , as well as hysteresis in the magnets , also cause variations in the voltage which usually have to be overcome by hand regulation . Automatic Constant - Potential Regulators . To ...
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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 circular mils 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 open arc operation ordinary parallel phase pipe placed pole polyphase porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit 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.