Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 172
KINS ELECTRICITY Ques. Explain how secondary connections are madefor different voltages. Ans. If, for instance, the secondary pressure of a trans-former having two sections be 100 volts with the terminals inparallel, as in fig. 1,990, then connecting them in series will give200 volts at the free… … Fig. 1,989.—Method of comparing instantaneous polarity. Two of the terminals are con-nected as shown by a small strip of fuse wire, and then touching the other two terminalstogether. If the fuse blow, then the connections must be i-eversed; if it do not. thenthey may be made permanent. Ans. It will…
Electrical engineering
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