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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Результати 6-10 із 85
Сторінка 22
... amount being 6,000 volts , and the middle point being zero . This assumes an ideal case with a uniform distribu- tion of conductor resistance and insulation resistance , but would - be approximately true for a practical case in which ...
... amount being 6,000 volts , and the middle point being zero . This assumes an ideal case with a uniform distribu- tion of conductor resistance and insulation resistance , but would - be approximately true for a practical case in which ...
Сторінка 23
... amount . A voltmeter connected across from the brush of B to the + brush of C would only indicate 2,000 volts , in spite of the fact that the E.M.F. generated between those points is 4,000 volts , the remaining 2,000 volts being used in ...
... amount . A voltmeter connected across from the brush of B to the + brush of C would only indicate 2,000 volts , in spite of the fact that the E.M.F. generated between those points is 4,000 volts , the remaining 2,000 volts being used in ...
Сторінка 37
... amount of the drop , which was five or six volts in some instances . It was also stated that the remedy for this vari- ation consists in regulating the pressure at the feeding - points . Thus it appears that it is necessary to maintain ...
... amount of the drop , which was five or six volts in some instances . It was also stated that the remedy for this vari- ation consists in regulating the pressure at the feeding - points . Thus it appears that it is necessary to maintain ...
Сторінка 42
... amount of current will pass to the other main , CD . Hence the current decreases uniformly from its maximum value I , at the point A , to 0 at the point B. At any point x , the current in the mains will be the total current I , minus ...
... amount of current will pass to the other main , CD . Hence the current decreases uniformly from its maximum value I , at the point A , to 0 at the point B. At any point x , the current in the mains will be the total current I , minus ...
Сторінка 46
... amount - RIL RIL 3 RLL . + = 4 2 4 ( 19 ) This value is only three - quarters as large as the maximum drop in Case I. , which was found to be RIL ; and the greatest differ- ence between the voltage of lamps is only one - quarter as much ...
... amount - RIL RIL 3 RLL . + = 4 2 4 ( 19 ) This value is only three - quarters as large as the maximum drop in Case I. , which was found to be RIL ; and the greatest differ- ence between the voltage of lamps is only one - quarter as much ...
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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 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.