The cover image was created by the transcriber and is placed in the public domain.
THE THOUGHT IS IN THE QUESTION THE INFORMATION IS IN THE ANSWER
HAWKINS
ELECTRICAL GUIDE
NUMBER
SEVEN
QUESTIONS
ANSWERS
&
ILLUSTRATIONS
A PROGRESSIVE COURSE OF STUDYFOR ENGINEERS, ELECTRICIANS, STUDENTSAND THOSE DESIRING TO ACQUIRE AWORKING KNOWLEDGE OF
ELECTRICITY AND ITS APPLICATIONS
A PRACTICAL TREATISE
by
HAWKINS AND STAFF
THEO. AUDEL & CO. 72 FIFTH AVE. NEW YORK.
COPYRIGHTED, 1915,
BYTHEO. AUDEL & CO.,
New York.
Printed in the United States.
TABLE OF CONTENTS
GUIDE NO. 7.
| ALTERNATING CURRENT SYSTEMS | 1,531 to 1,586 |
|---|---|
| Advantages of the alternating current—classification of systems—vector summation; examples—forms of circuit: series, parallel, parallel series, series parallel—transformer systems: individual transformers; transformation at distribution centers—single phase system; two wire transmission and three wire distribution; objections to single phase systems; advantages—monocyclic system—two phase systems: adaptation; ordinary voltages used; two phase three wire system; two phase five wire system—three phase systems: six wire; four wire; three wire; connections: star, delta, star delta, delta star; evolution of three wire system; pressure and current relations; connection of transformers; open delta connection—change of frequency—Schaghticoke-Schenectady transmission line—transformation of phases: three to one, three to two, two to six, and three to six phase—Scott connection for transforming from three to two phase—three to two phase with three star connected transformers—economy of a.c. systems—relative weights of copper required for polyphase systems—aermotor towers of Southern Power Co.—choice of voltage—usual transmission voltages—diagram of three phase distribution—mixed current systems; usual d.c. pressure on traction lines; use of mixed systems. | ...|