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 1
... distance transmission ; and even in an isolated electric - lighting plant the wiring is usually more expensive than the boilers , engines , and dynamos combined . Substantially the same principles apply to all branches of elec- trical ...
... distance transmission ; and even in an isolated electric - lighting plant the wiring is usually more expensive than the boilers , engines , and dynamos combined . Substantially the same principles apply to all branches of elec- trical ...
Сторінка 10
... distance transmission in contradistinction to local distribution , the relation between the first cost of the conductors and the energy lost in them may be a matter of prime importance . This subject was first attacked in 1881 by Lord ...
... distance transmission in contradistinction to local distribution , the relation between the first cost of the conductors and the energy lost in them may be a matter of prime importance . This subject was first attacked in 1881 by Lord ...
Сторінка 18
... distance transmission circuit 5,000 to 25,000 volts . Polyphase Alternating Current . 18. Two - phase system . 19. Three - phase system . 20. Monocyclic system . For the sake of completeness , the above table includes almost every ...
... distance transmission circuit 5,000 to 25,000 volts . Polyphase Alternating Current . 18. Two - phase system . 19. Three - phase system . 20. Monocyclic system . For the sake of completeness , the above table includes almost every ...
Сторінка 29
... are assumed to be 200 feet apart in a straight line , making a total distance of 800 feet between the extreme groups , as shown in Fig . 13. The five groups of lamps represented PARALLEL SYSTEMS OF ELECTRICAL DISTRIBUTION . 29.
... are assumed to be 200 feet apart in a straight line , making a total distance of 800 feet between the extreme groups , as shown in Fig . 13. The five groups of lamps represented PARALLEL SYSTEMS OF ELECTRICAL DISTRIBUTION . 29.
Сторінка 32
... distances are considerable , and where joints or cut - outs would be introduced in any event , it may be desirable to vary the size of a main in proportion to the current it is to carry at different points . In this discussion it is of ...
... distances are considerable , and where joints or cut - outs would be introduced in any event , it may be desirable to vary the size of a main in proportion to the current it is to carry at different points . In this discussion it is of ...
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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.