Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 62
I?eve/oped Fig. 85.—Internal connections of the regulating transformer shown m Fig. 84. Resistancesinserted between the contacts to prevent sparking. … Fig. 86.—Connection of the windings of a single-phase induction potential regulator.Rotor in position to generate the maximum secondary e.m.f. The principle of the inductionregulator is the same as that of the transformer type, except that the transition from maximumboost to maximum lower is smooth…
Electric wiring
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