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
... methods and forms of apparatus employed in actual practice . In the space available it has been impossible to go deeply into any subject , but the attempt has been made to cover the important elements and their relation , so that they ...
... methods and forms of apparatus employed in actual practice . In the space available it has been impossible to go deeply into any subject , but the attempt has been made to cover the important elements and their relation , so that they ...
Сторінка 6
... method is to find the value of the temperature coefficient for conductivity ( 1.0038701 + .00000900972 ) , take its reciprocal , which gives the temperature coefficient for resistance , then multiply the resistance at 0 ° C. by this ...
... method is to find the value of the temperature coefficient for conductivity ( 1.0038701 + .00000900972 ) , take its reciprocal , which gives the temperature coefficient for resistance , then multiply the resistance at 0 ° C. by this ...
Сторінка 12
... to the working conditions . Probably the safest , as well as the quickest , method to arrive at a correct result would be to obtain a general solution of the problem by means of some form of Kelvin's Law ; 12 ELECTRIC LIGHTING .
... to the working conditions . Probably the safest , as well as the quickest , method to arrive at a correct result would be to obtain a general solution of the problem by means of some form of Kelvin's Law ; 12 ELECTRIC LIGHTING .
Сторінка 26
... method of distribution , and both have been used . The current 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 ...
... method of distribution , and both have been used . The current 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 ...
Сторінка 27
... method of operation would remain substantially the same ; but as the phenomena of alternating currents differ in some respects from those of direct currents , the discussion of such systems will be given in the chapters on Alternating ...
... method of operation would remain substantially the same ; but as the phenomena of alternating currents differ in some respects from those of direct currents , the discussion of such systems will be given in the chapters on Alternating ...
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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 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 operation ordinary parallel phase pipe placed pole polyphase polyphase systems porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit secondary coils 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.