Arithmetic of Electricity: A Practical Treatise on Electrical Calculations of All Kinds Reduced to a Series of Rules, All of the Simplest Forms, and Involving Only Ordinary Arithmetic ...N.W. Henley Publishing Company, 1909 - 162 стор. |
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Сторінка 47
... conversion from primary to secondary current in the converter as below . Note . The ratio of primary E. M. F. to secondary is ex- pressed by dividing the primary by the secondary , and is termed ratio of conversion . Thus in a 1000 volt ...
... conversion from primary to secondary current in the converter as below . Note . The ratio of primary E. M. F. to secondary is ex- pressed by dividing the primary by the secondary , and is termed ratio of conversion . Thus in a 1000 volt ...
Сторінка 48
... ratio of conversion . EXAMPLE . Take data of last problem and solve . Solution : [ 3600 X 650 X 21.58 X ( 100-3 ) + ( 50 X 3 ) ] 202 = 81,637 circular mils . The two last examples may be made to prove each other , thus : The total ...
... ratio of conversion . EXAMPLE . Take data of last problem and solve . Solution : [ 3600 X 650 X 21.58 X ( 100-3 ) + ( 50 X 3 ) ] 202 = 81,637 circular mils . The two last examples may be made to prove each other , thus : The total ...
Сторінка 49
... ratio of conversion must be based on the E. M. F. at the coil ( in this case on 1031 1000 volts ) not on the E. M. F. at the beginning of the leads or portion thereof con- sidered in the calculation . The percentage of drop must be ...
... ratio of conversion must be based on the E. M. F. at the coil ( in this case on 1031 1000 volts ) not on the E. M. F. at the beginning of the leads or portion thereof con- sidered in the calculation . The percentage of drop must be ...
Сторінка 130
... ratio is expressed by the ratio of conversion , when squared it gives the ratio of the squares as required . Rule 37 , page 59 . Let d = diameter 130 ARITHMETIC OF ELECTRICITY .
... ratio is expressed by the ratio of conversion , when squared it gives the ratio of the squares as required . Rule 37 , page 59 . Let d = diameter 130 ARITHMETIC OF ELECTRICITY .
Сторінка 159
... Battery , current of . 801089 78 tro - magnets and arma- 65 tures 86 68 Battery , effective rate of Convection and radiation , loss of heat by .. 58 work of .77-78 Conversion , ratio of . 47 Converters , rule for wind- ing E. M. F. ,
... Battery , current of . 801089 78 tro - magnets and arma- 65 tures 86 68 Battery , effective rate of Convection and radiation , loss of heat by .. 58 work of .77-78 Conversion , ratio of . 47 Converters , rule for wind- ing E. M. F. ,
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Загальні терміни та фрази
50 cents 50 ohms 50 volts air gaps alternating current ampere turns ance appliances armature core battery C. G. S. units calculated calories capacity cells in parallel cells in series circular mils coefficient of leakage coil conductance conductor copper coulombs cross-sectional area cycles per second difference of potential distance divided drop dynamo efficiency electromotive force energy engines EXAMPLE expressed external circuit factors farad field resistance fractions given gives gram heat developed horse power horse-power inductance internal resistance joules kilogram-meter lamps in parallel leads length lines of force lines per square magnet core magnetic circuit meter microfarad microhms mils in diameter motor multiplied number of cells number of turns Ohm's law ohms resistance permeability permeance proportion ratio of conversion reciprocal reduced reluctance Rule 55 Rules 30 sectional area shunt Solution specific resistance square centimeter square inch tion turns of wire voltage weight wrought iron
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