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 1-5 із 100
Сторінка
... various auxiliary devices , such as switches , cut - outs , meters , etc. , employed in con- nection with the same . In short , the present volume covers all parts of electric lighting systems outside of the generating plants , the ...
... various auxiliary devices , such as switches , cut - outs , meters , etc. , employed in con- nection with the same . In short , the present volume covers all parts of electric lighting systems outside of the generating plants , the ...
Сторінка 4
... various lamps are not supplied with suf- ficient pressure or with the same pressure ; second , it involves a loss of energy and efficiency ; and third , it produces heating of the conductors , which may destroy the insulation or give ...
... various lamps are not supplied with suf- ficient pressure or with the same pressure ; second , it involves a loss of energy and efficiency ; and third , it produces heating of the conductors , which may destroy the insulation or give ...
Сторінка 5
... various sizes of wire , for both the American ( B. and S. ) and Birmingham ( Stubs ) gauges . This table , for the A. W. G. and covering wires , from Nos . 0000 to 18 inclusive , is given on page 8. The resistance of any copper wire at ...
... various sizes of wire , for both the American ( B. and S. ) and Birmingham ( Stubs ) gauges . This table , for the A. W. G. and covering wires , from Nos . 0000 to 18 inclusive , is given on page 8. The resistance of any copper wire at ...
Сторінка 9
... various kinds of conductors will be discussed later . In any given case the probable temperature around a conductor and the rise due to the current can be at least approximately de- termined , so that resistance calculations can be made ...
... various kinds of conductors will be discussed later . In any given case the probable temperature around a conductor and the rise due to the current can be at least approximately de- termined , so that resistance calculations can be made ...
Сторінка 11
... various modifica- tions and extensions of it . Professor George Forbes has also con- tributed to this subject in his Cantor Lectures of 1885 , * in which he showed that the portion of the investment which is not propor- tional to the ...
... various modifica- tions and extensions of it . Professor George Forbes has also con- tributed to this subject in his Cantor Lectures of 1885 , * in which he showed that the portion of the investment which is not propor- tional to the ...
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.