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 22
... shown in Fig . 4 , the + brush of C being + 3,000 volts , and the brush of A being 3,000 volts , with respect to the potential of the earth , which is represented by the zero line 00. The fall of potential through the circuit is indicated ...
... shown in Fig . 4 , the + brush of C being + 3,000 volts , and the brush of A being 3,000 volts , with respect to the potential of the earth , which is represented by the zero line 00. The fall of potential through the circuit is indicated ...
Сторінка 26
... shown ( Fig . 9 ) , the current required would be 15 amperes , since there are 5 rows of lamps , each taking 3 am- peres . With 10 lamps of 50 - candle - power and 50 volts in series , the dynamo should operate at a constant potential ...
... shown ( Fig . 9 ) , the current required would be 15 amperes , since there are 5 rows of lamps , each taking 3 am- peres . With 10 lamps of 50 - candle - power and 50 volts in series , the dynamo should operate at a constant potential ...
Сторінка 30
... Fig . 13. The five groups of lamps represented by the light vertical lines are connected together by two conductors , which are shown as heavy horizontal lines . These conductors correspond to the so - called mains in electrical ...
... Fig . 13. The five groups of lamps represented by the light vertical lines are connected together by two conductors , which are shown as heavy horizontal lines . These conductors correspond to the so - called mains in electrical ...
Сторінка 31
... shown in an exaggerated manner in Fig . 14. It will be seen that a potential of 111 volts , supplied at the feeding - points , gives 109 volts at the other end , therefore no lamp receives a pressure more than one volt greater or less ...
... shown in an exaggerated manner in Fig . 14. It will be seen that a potential of 111 volts , supplied at the feeding - points , gives 109 volts at the other end , therefore no lamp receives a pressure more than one volt greater or less ...
Сторінка 33
... Fig . 16 , the mains are supposed to be fed at their centers , as shown . In this arrangement No. 2 wire , weighing 321.5 lbs . , gives almost exactly the same variations of potential as in the two preceding cases , the maximum pressure ...
... Fig . 16 , the mains are supposed to be fed at their centers , as shown . In this arrangement No. 2 wire , weighing 321.5 lbs . , gives almost exactly the same variations of potential as in the two preceding cases , the maximum pressure ...
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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.