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 14
... placed in wooden panels or molding , the rules for which will be given later . Insu- lated wires suspended in air are more highly heated than similar submarine or most underground conductors , for the reason that the thermal losses by ...
... placed in wooden panels or molding , the rules for which will be given later . Insu- lated wires suspended in air are more highly heated than similar submarine or most underground conductors , for the reason that the thermal losses by ...
Сторінка 19
... placed upon a single arc - lighting circuit ; and since each lamp ( open arc ) requires about fifty volts , it follows that the total pressure approximates 3,000 volts . The problem of designing or studying series circuits is not ...
... placed upon a single arc - lighting circuit ; and since each lamp ( open arc ) requires about fifty volts , it follows that the total pressure approximates 3,000 volts . The problem of designing or studying series circuits is not ...
Сторінка 24
... placed on a single loop , in which case the arrangement reduces to the ordinary one shown in Fig . 3 . When the number of lamps on any loop is augmented or diminished , the potential difference between its terminals varies in direct pro ...
... placed on a single loop , in which case the arrangement reduces to the ordinary one shown in Fig . 3 . When the number of lamps on any loop is augmented or diminished , the potential difference between its terminals varies in direct pro ...
Сторінка 25
... of current is indicated by an ampere meter , or current indi- cator A placed in each circuit , and is corrected and brought back to its normal value by switching in an extra or SERIES SYSTEMS OF ELECTRICAL DISTRIBUTION . 25.
... of current is indicated by an ampere meter , or current indi- cator A placed in each circuit , and is corrected and brought back to its normal value by switching in an extra or SERIES SYSTEMS OF ELECTRICAL DISTRIBUTION . 25.
Сторінка 36
... placed with respect to the feed- ing - points . In Fig . 17 , for example , the second and fourth groups 110 VOLTS . 200 FT . NO . 10..2 OHM . 12.5 AMP . 2.5 VOLTS DROP 100 FT . NO . 10. .1 OHM . 25 AMP . 2.5 VOLTS . DROP + 200 FT . NO ...
... placed with respect to the feed- ing - points . In Fig . 17 , for example , the second and fourth groups 110 VOLTS . 200 FT . NO . 10..2 OHM . 12.5 AMP . 2.5 VOLTS DROP 100 FT . NO . 10. .1 OHM . 25 AMP . 2.5 VOLTS . DROP + 200 FT . NO ...
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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.