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
... capacity ( because smaller wires are used ) more than make up for the increased first cost . Iron has rarely been utilized as a conductor in electric light , power , or other circuits that carry large currents , because its conduc ...
... capacity ( because smaller wires are used ) more than make up for the increased first cost . Iron has rarely been utilized as a conductor in electric light , power , or other circuits that carry large currents , because its conduc ...
Сторінка 9
... capacity the rise in temperature of the 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 ...
... capacity the rise in temperature of the 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 ...
Сторінка 13
... capacity can be given , as much depends upon the conditions in each case . But , since a wide margin must be allowed between the danger point and the permissible current capacity , it is possible to establish rules which are somewhat ...
... capacity can be given , as much depends upon the conditions in each case . But , since a wide margin must be allowed between the danger point and the permissible current capacity , it is possible to establish rules which are somewhat ...
Сторінка 15
... capacity of different sizes of insulated copper conductors : TABLES OF CURRENT - CARRYING CAPACITY . TABLE 1. TABLE 2. TABLE 3 . TABLE 2. TABLE 3 . A. W. G. AMPERES . AMPERES . AMPERES . CIRCULAR MILLS . AMPERES . AMPERES . 18 3 3 5 ...
... capacity of different sizes of insulated copper conductors : TABLES OF CURRENT - CARRYING CAPACITY . TABLE 1. TABLE 2. TABLE 3 . TABLE 2. TABLE 3 . A. W. G. AMPERES . AMPERES . AMPERES . CIRCULAR MILLS . AMPERES . AMPERES . 18 3 3 5 ...
Сторінка 26
... capacity of the dynamo must be sufficient to supply the various circuits in parallel . In the case shown ( Fig . 9 ) , the current required would be 15 amperes , since there are 5 rows of lamps , each taking 3 am- peres . With 10 lamps ...
... capacity of the dynamo must be sufficient to supply the various circuits in parallel . In the case shown ( Fig . 9 ) , the current required would be 15 amperes , since there are 5 rows of lamps , each taking 3 am- peres . With 10 lamps ...
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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.