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 68
Сторінка
... CARBON 427 ELECTRIC METERS CHAPTER XIX . 432 APPENDIX I. NATIONAL ELECTRIC CODE 451 APPENDIX II . REPORT OF THE COMMITTEE ON STANDARDIZATION 486 INDEX 503 ELECTRIC LIGHTING . CHAPTER I. ELECTRICAL DISTRIBUTION . PHYSICAL PROPERTIES vi ...
... CARBON 427 ELECTRIC METERS CHAPTER XIX . 432 APPENDIX I. NATIONAL ELECTRIC CODE 451 APPENDIX II . REPORT OF THE COMMITTEE ON STANDARDIZATION 486 INDEX 503 ELECTRIC LIGHTING . CHAPTER I. ELECTRICAL DISTRIBUTION . PHYSICAL PROPERTIES vi ...
Сторінка 298
... carbon best fulfills the requirements . Appearance . When an arc is sprung between two carbon rods placed vertically one over the other , and kept about one - eighth of an inch apart , a constant current of about 5 to 15 amperes will ...
... carbon best fulfills the requirements . Appearance . When an arc is sprung between two carbon rods placed vertically one over the other , and kept about one - eighth of an inch apart , a constant current of about 5 to 15 amperes will ...
Сторінка 299
... carbon vapor , surrounded by a thin non - luminous portion where the carbon combines with the oxygen of the atmo- sphere in dark flame to form carbon monoxide ( CO ) . This is enveloped in turn by a layer of luminous flame in which the ...
... carbon vapor , surrounded by a thin non - luminous portion where the carbon combines with the oxygen of the atmo- sphere in dark flame to form carbon monoxide ( CO ) . This is enveloped in turn by a layer of luminous flame in which the ...
Сторінка 300
... carbon . That carbon is vola- tilized in the arc is undoubtedly a fact . The surface of the crater has the appearance of boiling ; the hissing noise occurring with excessive current density is similar to that produced by violent boiling ...
... carbon . That carbon is vola- tilized in the arc is undoubtedly a fact . The surface of the crater has the appearance of boiling ; the hissing noise occurring with excessive current density is similar to that produced by violent boiling ...
Сторінка 301
... carbon , another due to the thermo- electric effect at the positive carbon , and perhaps still another thermo - electric potential at the negative carbon . Voltage dependent on Boiling Point . From what has already been said , it seems ...
... carbon , another due to the thermo- electric effect at the positive carbon , and perhaps still another thermo - electric potential at the negative carbon . Voltage dependent on Boiling Point . From what has already been said , it seems ...
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 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.