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 100
Сторінка 20
... insulation is low or any defect exists at any particular point , then a 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 ...
... insulation is low or any defect exists at any particular point , then a 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 ...
Сторінка 21
... insulation to be perfect , or that a ground connection exists at some particular point , or that it has a high resistance . The circuit should always be treated as if the most dangerous possible conditions existed . - Regulation of ...
... insulation to be perfect , or that a ground connection exists at some particular point , or that it has a high resistance . The circuit should always be treated as if the most dangerous possible conditions existed . - Regulation of ...
Сторінка 22
... ( insulated ) would be about $ 500 . It is doubtful if it would be wise to invest an additional $ 500 in order to use No ... insulation resistance , but would - - be approximately true for a practical case in which the 22 ELECTRIC LIGHTING .
... ( insulated ) would be about $ 500 . It is doubtful if it would be wise to invest an additional $ 500 in order to use No ... insulation resistance , but would - - be approximately true for a practical case in which the 22 ELECTRIC LIGHTING .
Сторінка 23
... insulation of some portion of the circuit in good condition . became poor , it would tend to make the poten- tial at that point ap- proach zero , producing a corresponding change in the rest of the cir- cuit . For example , a ground ...
... insulation of some portion of the circuit in good condition . became poor , it would tend to make the poten- tial at that point ap- proach zero , producing a corresponding change in the rest of the cir- cuit . For example , a ground ...
Сторінка 31
... insulated , in which case the potentials of the mains at the feeding - points would be + 55.5 volts and 55.5 volts respectively . A defect in the insulation at any point would tend to cause the potential of that point to approach zero ...
... insulated , in which case the potentials of the mains at the feeding - points would be + 55.5 volts and 55.5 volts respectively . A defect in the insulation at any point would tend to cause the potential of that point to approach zero ...
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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.