. Practical wireless telegraphy; a complete text book for students of radio communication . number of watts in a given circuit = I >< E, then (assuming W - 500no ohase displacement) I = — or for winding P, I = = amperes, the approxi- E 2200 mate value of the current flowing through winding P. A one ampere fuse would thereforeprotect the primary circuit from overload. 50 PRACTICAL WIRELESS TELEGRAPHY. The installation of all types of a power or radio equipment are made in accordance withcertain definite rules or regulations which have been adopted by the National Associationof Electr
. Practical wireless telegraphy; a complete text book for students of radio communication . number of watts in a given circuit = I >< E, then (assuming W - 500no ohase displacement) I = — or for winding P, I = = amperes, the approxi- E 2200 mate value of the current flowing through winding P. A one ampere fuse would thereforeprotect the primary circuit from overload. 50 PRACTICAL WIRELESS TELEGRAPHY. The installation of all types of a power or radio equipment are made in accordance withcertain definite rules or regulations which have been adopted by the National Associationof Electrical Inspectors. These rules vary slightly in different cities of the United States,but are generally in accordance with the national code. The installation of power orwireless apparatus should not be undertaken until these rules have been carefully gone foregoing explanations and examples explain but partially the problems of ordinaryelectric circuits, but they serve to show certain fundamental facts which should be of somtvalue to the elementary student of radio-telegraphy,. Fig. 62a.—A High Power Radio Station in the Tropics. PART GENERATORS. HAND AND AUTOMATIC MOTOR STARTERS. 52. The Motor Generator. 53. Field Rheostats. and Rotary Converter. 55. The MotorStarter. 56. Automatic Motor Starters. 57. ProtectiveCondensers. 58. Care of the Motor Generator. to Remove Motor Generator Armature. 52. The Motor Generator.—The required high voltage current for theoperation of a radio-transmitter is obtained from (!) a source of alternating current, (2) an alternating current step-up transformer; but practically all vesselsthat have been fitted with radio sets to date have a direct current dynamo makingit necessary to install a motor generator to obtain an A. C. source of supply. A motor generator is simply a motor and a dynamo coupled together on a com-mon cast iron base, the motor being set into rotation by direct current, the dynamoin turn
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
