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 35
... Closed Ring ; 2,000 ft . No. 8 ; 100 lbs . Copper ; 115.23 Volts Between Feeding- Points ; 1.95 Volts Max . Difference Between Lamps ; 5.53 Volts Average Drop . tial to occur when a large number of lamps are thrown on or off the circuit ...
... Closed Ring ; 2,000 ft . No. 8 ; 100 lbs . Copper ; 115.23 Volts Between Feeding- Points ; 1.95 Volts Max . Difference Between Lamps ; 5.53 Volts Average Drop . tial to occur when a large number of lamps are thrown on or off the circuit ...
Сторінка 36
... Closed Square ; 1,600 ft . No. 10 ; 50.3 lbs . Copper ; No Difference Between Lamps ; 117.5 Volts Between Feeding - Points ; 7.5 Volts Average Drop . of lamps have exactly the same voltage , since they are equally dis- tant from the ...
... Closed Square ; 1,600 ft . No. 10 ; 50.3 lbs . Copper ; No Difference Between Lamps ; 117.5 Volts Between Feeding - Points ; 7.5 Volts Average Drop . of lamps have exactly the same voltage , since they are equally dis- tant from the ...
Сторінка 49
... closed loop or ring arrangement of mains , the problem becomes somewhat more diffi- A + C E F B H Fig . 27. Effect of Unequal Distribution of Lamps on Anti - Parallel System . Such a case is rep- cult , since there are two paths for the ...
... closed loop or ring arrangement of mains , the problem becomes somewhat more diffi- A + C E F B H Fig . 27. Effect of Unequal Distribution of Lamps on Anti - Parallel System . Such a case is rep- cult , since there are two paths for the ...
Сторінка 55
... closed first , allowing the current to flow through the series coil B , and the regulation of voltage is made under these condi- tions . The switch D is then closed , and the E.M.F. of that ma- chine will not change materially . The ...
... closed first , allowing the current to flow through the series coil B , and the regulation of voltage is made under these condi- tions . The switch D is then closed , and the E.M.F. of that ma- chine will not change materially . The ...
Сторінка 56
... closed , and the equalizer switch E left open , which is likely to cause serious trouble , due to an excessive or reversed current in the series coil B ; or the switches D and E might happen to be closed with F open , in which event the ...
... closed , and the equalizer switch E left open , which is likely to cause serious trouble , due to an excessive or reversed current in the series coil B ; or the switches D and E might happen to be closed with F open , in which event the ...
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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.