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 6-10 із 75
Сторінка 86
... magnet , in order to neutralize the effects of armature reaction . Fig . 63 shows a combination similar to the three - wire system represented in Fig . 51 , a battery , N , P , Q , R , being utilized to subdivide the voltage of the main ...
... magnet , in order to neutralize the effects of armature reaction . Fig . 63 shows a combination similar to the three - wire system represented in Fig . 51 , a battery , N , P , Q , R , being utilized to subdivide the voltage of the main ...
Сторінка 94
... magnet , as illustrated in Fig . 68. This construction secures compactness , and also causes the armature reaction ... magnetic flux , or other conditions of one with respect to. Fig . 68. Dynamotor , with Single Field . Fig . 69. Motor ...
... magnet , as illustrated in Fig . 68. This construction secures compactness , and also causes the armature reaction ... magnetic flux , or other conditions of one with respect to. Fig . 68. Dynamotor , with Single Field . Fig . 69. Motor ...
Сторінка 95
... magnet . This allows the field of the dynamo to be independently regulated , in order to vary the voltage gener- ated . In fact , any of the well - known methods of dynamo regula- tion may be employed . For example , compound or over ...
... magnet . This allows the field of the dynamo to be independently regulated , in order to vary the voltage gener- ated . In fact , any of the well - known methods of dynamo regula- tion may be employed . For example , compound or over ...
Сторінка 101
... magnet X and wires P. The latter also serve as pressure wires , the voltage on the mains being indicated in the station by a voltmeter V. tem . Compensators U are connected to the three - wire mains M at various points to equalize the ...
... magnet X and wires P. The latter also serve as pressure wires , the voltage on the mains being indicated in the station by a voltmeter V. tem . Compensators U are connected to the three - wire mains M at various points to equalize the ...
Сторінка 115
... magnetic energy stored in a coil when a unit current is flowing , which energy is proportional to the square of the flux density , other things being equal . These three definitions may be summed up as follows : PRINCIPLES OF ...
... magnetic energy stored in a coil when a unit current is flowing , which energy is proportional to the square of the flux density , other things being equal . These three definitions may be summed up as follows : PRINCIPLES OF ...
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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.