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 1-5 із 51
Сторінка 17
... candle- power per volt ) . 3. Series incandescent lighting ( " Municipal systems " ) . Three to 3.5 amperes and 20 to 50 volts per lamp ( 1 volt ) per candle- power ) . 4. Series - parallel incandescent lighting . Similar to No. 2 , but ...
... candle- power per volt ) . 3. Series incandescent lighting ( " Municipal systems " ) . Three to 3.5 amperes and 20 to 50 volts per lamp ( 1 volt ) per candle- power ) . 4. Series - parallel incandescent lighting . Similar to No. 2 , but ...
Сторінка 25
... candle - power . The practice with this system is to feed the circuit with a constant potential , usually from 500 ... strength , since the total resistance is reduced , the potential remaining constant . This in- crease of current is ...
... candle - power . The practice with this system is to feed the circuit with a constant potential , usually from 500 ... strength , since the total resistance is reduced , the potential remaining constant . This in- crease of current is ...
Сторінка 26
... powerful light of the latter is not required . Either the direct or alternating current is applicable to this method ... candle - power and 50 volts in series , the dynamo should operate at a constant potential of 500 volts . A shunt or ...
... powerful light of the latter is not required . Either the direct or alternating current is applicable to this method ... candle - power and 50 volts in series , the dynamo should operate at a constant potential of 500 volts . A shunt or ...
Сторінка 29
... candle - power of the lamps , since the drop may be made substantially the same for all of them by some of the methods described later . On the other hand , variations in the candle - power of lamps , due to either of the last two ...
... candle - power of the lamps , since the drop may be made substantially the same for all of them by some of the methods described later . On the other hand , variations in the candle - power of lamps , due to either of the last two ...
Сторінка 41
... candle - power lamps , each taking one - half an ampere , are placed ten feet apart on mains each 200 feet long , the maximum allowable difference between any two lamps being one volt . Hence / 10 , N = 20 , C = .5 , and D = 1. The ...
... candle - power lamps , each taking one - half an ampere , are placed ten feet apart on mains each 200 feet long , the maximum allowable difference between any two lamps being one volt . Hence / 10 , N = 20 , C = .5 , and D = 1. The ...
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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.