Armature Winding and Motor Repair: Practical Information and Data Covering Winding and Reconnectig Procedure for Direct and Alternating Current Machines, Compiled for Electrical Men Responsible for the Operation and Repair of Motors and Generators in Industrial Plants and for Repairmen and Armature Winders in Electrical Repair Shops

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McGraw-Hill book Company, Incorporated, 1920 - Armatures - 515 pages
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Page 492 - Multiply the diameter of the driver by number of its revolutions, and divide the product by the diameter of the driven, the quotient will be the number of revolutions of the driven.
Page 469 - ... or more of the power delivered. At lower frequencies, however, the constants are reasonably correct even under such extreme conditions. They represent about the true values at 10 per cent. line loss, are close enough at all losses less than 10 per cent., and often, at least for frequencies up to 40 cycles, close enough for even much larger losses.
Page 498 - Side of an equal square. Diameter of a circle X 0.8862 = Side of an equal square. Base of a triangle X by % the altitude = Area.
Page 470 - E is the potential at the delivery end of the line and not at the generator. When the power factor cannot be more accurately determined, it may be assumed to be as follows for any alternating system operating under average conditions: Incandescent lighting and synchronous motors, 95 per cent; lighting and induction motors together...
Page 498 - Area of its base x -J of its altitude = solidity of a cone or pyramid, whether round, square, or triangular. Area of one of its sides x 6 = surface of a cube.
Page 493 - RULE : Multiply the diameter of the driver by its number of revolutions and divide the product by the number of revolutions of the driven ; the quotient will be its diameter.
Page 466 - Birmingham Gauge (BWG) = Stubs, Old English Standard and Iron Wire Gauge. Roebling = Washburn Moen, American Steel & Wire Co.'s Iron Wire Gauge. London! = Old English (Not Old English Standard). As a further complication: Birmingham or Stubs' Iron Wire Gauge is not the same as Stubs
Page 498 - Solidity Cube of the radius of a sphere x 4.1888 = Solidity Cube of the circumference of a sphere x 0.016887 = Solidity Square root of the surface of a sphere x 0.56419 = Diameter Square root of the surface of a sphere x 1.772454 = Circumference Cube root of the solidity of a sphere x...
Page 470 - ... for either of the outside wires. In both continuous and alternating-current systems, the neutral conductor for secondary mains and house wiring should be taken as large as the other conductors. " The three wires of a three-phase circuit and the four wires of a two-phase circuit should all be made the same size, and each conductor should be of the cross-section given by the first formula".
Page 468 - W = Total watts delivered. D = Distance of transmission (one way) in feet. p = Loss in line in per cent of power delivered, that is, of W. E = Voltage between main conductors at receiving or consumer's end of circuit. For continuous current C

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