Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 373
ll become manifest by the lamps refusingto light up under any manipulation of speed by the operator,and he will not be led to believe tiiat the machines are insynchronism, as might be the case if the dark method wereused. On the other hand, the precise instant of synchronismcan be so much more… … Fig. 419.—Connections for s\Tichronizing two single-phase alternators; lamps bright. The reason that the lamps in either method provide aguide is very .simple. When terminal c of generator G^_,Fig. 418, is positive at the same instant as terminal a of gen-erator G^ and the voltage of the two…
Electric machinery
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