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
... equal length and resistance . Although there are several metals that could be used as elec- trical conductors which are considerably lighter than copper , it is doubtful if it would be desirable to use them , except in special cases ...
... equal length and resistance . Although there are several metals that could be used as elec- trical conductors which are considerably lighter than copper , it is doubtful if it would be desirable to use them , except in special cases ...
Сторінка 11
... equals the annual cost of energy wasted . In other words , the total annual expenditure for interest on the investment and energy lost on the line is a minimum when these two items are equal to each other . The importance of this law ...
... equals the annual cost of energy wasted . In other words , the total annual expenditure for interest on the investment and energy lost on the line is a minimum when these two items are equal to each other . The importance of this law ...
Сторінка 19
... equal to the sum of the pressures con- sumed in all of the lamps on the circuit . For example , sixty lamps are commonly placed upon a single arc - lighting circuit ; and since each lamp ( open arc ) requires about fifty volts , it ...
... equal to the sum of the pressures con- sumed in all of the lamps on the circuit . For example , sixty lamps are commonly placed upon a single arc - lighting circuit ; and since each lamp ( open arc ) requires about fifty volts , it ...
Сторінка 20
... equal to fifty volts , multiplied by the number of lamps included between them . - Personal Danger from Series Circuits . If a man standing on the ground touches a very highly insulated circuit , only a very slight current will pass ...
... equal to fifty volts , multiplied by the number of lamps included between them . - Personal Danger from Series Circuits . If a man standing on the ground touches a very highly insulated circuit , only a very slight current will pass ...
Сторінка 28
... equal to the sum of the amperes 4 Amp . 3 Amp . 2 Amp . I Amp . 112 ཙོ ཡ Volts Amp Amp Amp . Amp Volts 110 4 Amp , 3 Amp . 2 Amp . 1 Amp . Fig . 11. Principle of Parallel Distribution . required by all of the lamps or other devices that ...
... equal to the sum of the amperes 4 Amp . 3 Amp . 2 Amp . I Amp . 112 ཙོ ཡ Volts Amp Amp Amp . Amp Volts 110 4 Amp , 3 Amp . 2 Amp . 1 Amp . Fig . 11. Principle of Parallel Distribution . required by all of the lamps or other devices that ...
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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.