. 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. Figs. and —Hydraulic analogy- illustrating three phase alternating current. Threecylinders are here shown with pistons connected through Scotch yokes to cranks placed120° apart. The same action takes place in each cylinder as in the preceding cases, theonly difference being the additional c,-Under, and difference in phase relation. Ques. How is
. 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. Figs. and —Hydraulic analogy- illustrating three phase alternating current. Threecylinders are here shown with pistons connected through Scotch yokes to cranks placed120° apart. The same action takes place in each cylinder as in the preceding cases, theonly difference being the additional c,-Under, and difference in phase relation. Ques. How is three phase current generated? Ans It requires three equal windings on the alternatorarmature, and they must be spaced out over its surface so as 28 HA WKIS to be sue >uble pole pitch) a par: Ques. How many vrirea are used for three phasedistribution? Either six wires or ires. Aires, as in fig. sired to supply ■.depender.: _ ases sepa- equ;- ■t of the B
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