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 1-5 із 46
Сторінка 23
... positive terminal P would then at P + 6000 C 2000 B 2000 A 2000 0 N Fig . 5. Distribution of Potential with Grounded Terminal . become 6,000 volts , as represented in Fig . 5 : The new Brush system , illustrated in Fig . 6 , differs ...
... positive terminal P would then at P + 6000 C 2000 B 2000 A 2000 0 N Fig . 5. Distribution of Potential with Grounded Terminal . become 6,000 volts , as represented in Fig . 5 : The new Brush system , illustrated in Fig . 6 , differs ...
Сторінка 31
... positive values . But the potential difference would remain the same in all cases . Tapering Conductors . The use of tapering or " conical " con- ductors in place of the ordinary cylindrical ones is hardly practica- ble , on account of ...
... positive values . But the potential difference would remain the same in all cases . Tapering Conductors . The use of tapering or " conical " con- ductors in place of the ordinary cylindrical ones is hardly practica- ble , on account of ...
Сторінка 52
... positively dim . This is partly due to the usual falling off in the candle - power of lamps which occurs after they have burned for some time , amounting to a considerable loss after a run of 500 hours . This matter will be treated ...
... positively dim . This is partly due to the usual falling off in the candle - power of lamps which occurs after they have burned for some time , amounting to a considerable loss after a run of 500 hours . This matter will be treated ...
Сторінка 56
... positively produced when the switch E F is closed , avoid- ing the delay and uncertainty which are always involved when self- excitation alone is depended upon . In fact , self - exciting dynamos often fail to generate , or become ...
... positively produced when the switch E F is closed , avoid- ing the delay and uncertainty which are always involved when self- excitation alone is depended upon . In fact , self - exciting dynamos often fail to generate , or become ...
Сторінка 59
... positively brought to full strength so that the dynamo may be connected to the others as soon as it attains its speed , and the polarity cannot become reversed . On the other hand , the field may be accidentally left in circuit after ...
... positively brought to full strength so that the dynamo may be connected to the others as soon as it attains its speed , and the polarity cannot become reversed . On the other hand , the field may be accidentally left in circuit after ...
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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.