Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 237
rrent is tistially generated for lightingpurposes in a dynamo at from 1,000 to 2,000 volts. A smallcurrent at this high voltage will transmit a large numberof watts, and only small wires will be needed to transmitthis small current; one ampere, for instance, of this cur-rent at 1,000 volts is… … Figure 87Diagram of alternating current transformer. through the building to be lighted and operates 20 incan-descent lamps. Fig. 87 is; a diagram of a transformer; P isthe primary coil which receives the high voltage current, Sis the secondary coil which delivers the low voltage current,I is an…
Electricity
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