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 3
... bus bars , provided its cost is low enough . In addition to metals such as aluminum , which may be em- ployed for electrical conductors in place of copper , because they are lighter , other metals and alloys are used on account of cheap ...
... bus bars , provided its cost is low enough . In addition to metals such as aluminum , which may be em- ployed for electrical conductors in place of copper , because they are lighter , other metals and alloys are used on account of cheap ...
Сторінка 54
... bus bars G and I respectively , and E is a switch to connect R A R шица A B F GHI Fig . 30. Compound Dynamos in ... bus bars G and I. This fact may be ascertained by comparing two volt meters This matter is explained in vol . i . , p ...
... bus bars G and I respectively , and E is a switch to connect R A R шица A B F GHI Fig . 30. Compound Dynamos in ... bus bars G and I. This fact may be ascertained by comparing two volt meters This matter is explained in vol . i . , p ...
Сторінка 55
... bus bars , or by connecting a single volt meter first to one and then to the other , which avoids the error due to a difference between two instru- ments . A still better plan is to connect the dynamo to the ' bus bars through a high ...
... bus bars , or by connecting a single volt meter first to one and then to the other , which avoids the error due to a difference between two instru- ments . A still better plan is to connect the dynamo to the ' bus bars through a high ...
Сторінка 56
... bus bars , particularly when the equalizer is somewhat long or is too small in cross section . The use It would seem to be generally desirable to separate the switch D in order to have independent control of the equalizer . Another ...
... bus bars , particularly when the equalizer is somewhat long or is too small in cross section . The use It would seem to be generally desirable to separate the switch D in order to have independent control of the equalizer . Another ...
Сторінка 59
... bus excitation the shunt field coils are fed from the station mains or ' bus bars , the advantages being the fact that the field magnetism is promptly and positively brought to full strength so that the dynamo may be connected to the ...
... bus excitation the shunt field coils are fed from the station mains or ' bus bars , the advantages being the fact that the field magnetism is promptly and positively brought to full strength so that the dynamo may be connected to the ...
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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.