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 6-10 із 84
Сторінка 16
... considerable increase ( about 60 per cent ) in current above the rated value without injurious effects . This ... considerably below . this limit , in order to have a margin for safety . Table 3 permits a still greater current density ...
... considerable increase ( about 60 per cent ) in current above the rated value without injurious effects . This ... considerably below . this limit , in order to have a margin for safety . Table 3 permits a still greater current density ...
Сторінка 20
... considerable current may flow through his body . In Fig . 2 the line is supposed to have a ground connection at the point P , due to a defect in the insulation . This will cause the potential of the circuit to be zero at that point ...
... considerable current may flow through his body . In Fig . 2 the line is supposed to have a ground connection at the point P , due to a defect in the insulation . This will cause the potential of the circuit to be zero at that point ...
Сторінка 21
... considerable self - induction , resistance , and armature- reaction , all of which tend to prevent the current from rising to a high value , even when the machine is short - circuited . * In Series Arc - Lighting System . The general ...
... considerable self - induction , resistance , and armature- reaction , all of which tend to prevent the current from rising to a high value , even when the machine is short - circuited . * In Series Arc - Lighting System . The general ...
Сторінка 24
... considerably above the normal voltage . * Series Incandescent Lamps on Arc Circuits . Several forms of incandescent lamps have been designed and manufactured for use on the regular 10 - ampere arc circuits . These consist of lamps ...
... considerably above the normal voltage . * Series Incandescent Lamps on Arc Circuits . Several forms of incandescent lamps have been designed and manufactured for use on the regular 10 - ampere arc circuits . These consist of lamps ...
Сторінка 29
... considerable diminution of light . For example , the candle - power of an ordinary lamp is reduced from 16 to 15 , which is more than 6 per cent , when the pressure falls from 110 to 109 volts , or less than 1 per cent . Such a very ...
... considerable diminution of light . For example , the candle - power of an ordinary lamp is reduced from 16 to 15 , which is more than 6 per cent , when the pressure falls from 110 to 109 volts , or less than 1 per cent . Such a very ...
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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.