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 6-10 із 100
Сторінка 13
... effect of resistance in electrical distribution is the heating which it causes . The production of heat in an electrical conduc- tor has already been stated in terms of the various quantities in- volved . This heat is an absolutely ...
... effect of resistance in electrical distribution is the heating which it causes . The production of heat in an electrical conduc- tor has already been stated in terms of the various quantities in- volved . This heat is an absolutely ...
Сторінка 15
... effect of the latter is to increase the surface from which heat is radiated and carried away by convection . In most cases a con- siderable increase in the temperature of a bare wire is not objec- tionable except so far as it represents ...
... effect of the latter is to increase the surface from which heat is radiated and carried away by convection . In most cases a con- siderable increase in the temperature of a bare wire is not objec- tionable except so far as it represents ...
Сторінка 29
... effects in the lamps or other devices supplied by parallel circuits : — ( 1 ) All of the lamps receive a lower voltage than that gene- rated by the source of electrical energy . ( 2 ) Some lamps may be supplied with a lower pressure ...
... effects in the lamps or other devices supplied by parallel circuits : — ( 1 ) All of the lamps receive a lower voltage than that gene- rated by the source of electrical energy . ( 2 ) Some lamps may be supplied with a lower pressure ...
Сторінка 49
... Effect of Unequal Distribution of Lamps on Anti - Parallel System . Such a case is rep- cult , since there are two paths for the current . * resented in Fig . 28 , in which a pair of ring mains are supplied at the feeding - points ...
... Effect of Unequal Distribution of Lamps on Anti - Parallel System . Such a case is rep- cult , since there are two paths for the current . * resented in Fig . 28 , in which a pair of ring mains are supplied at the feeding - points ...
Сторінка 58
... effects . Two lamps , F F ' , constitute a non - inductive resistance for the relay circuit . An ordinary hand rheostat ... effect of over- compound winding . This would necessitate the running of special pressure wires to some distance ...
... effects . Two lamps , F F ' , constitute a non - inductive resistance for the relay circuit . An ordinary hand rheostat ... effect of over- compound winding . This would necessitate the running of special pressure wires to some distance ...
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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.