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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Результати 6-10 із 100
Сторінка 56
... 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 reversed in ...
... 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 reversed in ...
Сторінка 58
... producing the effect of over- compound winding . This would necessitate the running of special pressure wires to some distance , which may be avoided by provid- ing the relay solenoid , A , with a series coil in addition to the shunt ...
... producing the effect of over- compound winding . This would necessitate the running of special pressure wires to some distance , which may be avoided by provid- ing the relay solenoid , A , with a series coil in addition to the shunt ...
Сторінка 61
... produced . The causes and reme- dies for a dynamo failing to generate are given in Vol . I. , p . 362 , and more fully in Practical Management of Dynamos and Motors by Crocker and Wheeler , p . 155 . Feeder Regulation . It has been ...
... produced . The causes and reme- dies for a dynamo failing to generate are given in Vol . I. , p . 362 , and more fully in Practical Management of Dynamos and Motors by Crocker and Wheeler , p . 155 . Feeder Regulation . It has been ...
Сторінка 66
... it would short - circuit the potential difference between the two ' bus bars . The drop on a feeder being usually only a few volts , its circuit may be opened with practically no greater flash than is produced by any 66 ELECTRIC LIGHTING .
... it would short - circuit the potential difference between the two ' bus bars . The drop on a feeder being usually only a few volts , its circuit may be opened with practically no greater flash than is produced by any 66 ELECTRIC LIGHTING .
Сторінка 67
... produced by any other cir- cuit having a voltage equal to this drop , provided the remaining feeders and the mains are sufficient to carry the current without materially increasing the fall of potential upon them . Feeder Regulation by ...
... produced by any other cir- cuit having a voltage equal to this drop , provided the remaining feeders and the mains are sufficient to carry the current without materially increasing the fall of potential upon them . Feeder Regulation by ...
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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.