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 11-15 із 51
Сторінка 104
... load beyond Y be ignored , as already stated . Having thus determined the drop in voltage on the posi- tive mains , it is evident that precisely the same drop will also occur on the negative conductors . A lamp at / will receive the full ...
... load beyond Y be ignored , as already stated . Having thus determined the drop in voltage on the posi- tive mains , it is evident that precisely the same drop will also occur on the negative conductors . A lamp at / will receive the full ...
Сторінка 153
... total BO C C Α Fig . 126. Transformer Coil . copper loss , W , in watts is : W1 = I ' R ' + I2 R " . ( 69 ) Calling W ... full load it is about 3 per cent for 1 k . w . , and about 1 per cent P S T L M S P Fig . 127. Transformer Coil ...
... total BO C C Α Fig . 126. Transformer Coil . copper loss , W , in watts is : W1 = I ' R ' + I2 R " . ( 69 ) Calling W ... full load it is about 3 per cent for 1 k . w . , and about 1 per cent P S T L M S P Fig . 127. Transformer Coil ...
Сторінка 154
... load . In most practical types of transformer the iron losses are about equal to the copper losses at full load . This is not a necessary condition , it being an easy matter to design a transformer in which the iron losses are much ...
... load . In most practical types of transformer the iron losses are about equal to the copper losses at full load . This is not a necessary condition , it being an easy matter to design a transformer in which the iron losses are much ...
Сторінка 156
... full load . These tests were made in a room where the temperature was about 25 ° C. , and the full load was applied for ten and a half hours a day . This is fully as severe as ordinary practical service ; nevertheless , the temperature ...
... full load . These tests were made in a room where the temperature was about 25 ° C. , and the full load was applied for ten and a half hours a day . This is fully as severe as ordinary practical service ; nevertheless , the temperature ...
Сторінка 157
... full load , hence the eddy current loss is reduced in the proportion 120 : 100 , or in other words it is about 17 per cent less . But the eddy current loss is only about 20 per cent of the iron loss , so that the latter is reduced 3 or ...
... full load , hence the eddy current loss is reduced in the proportion 120 : 100 , or in other words it is about 17 per cent less . But the eddy current loss is only about 20 per cent of the iron loss , so that the latter is reduced 3 or ...
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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.