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 76
e hundreds place and so on. Each series of coils of thesame value is designated a decade. The connections are usuallymade as shown in figs. 570 and 571. It is apparent from the figure that any value in any one decade canbe obtained by inserting between a bar and a block, only one plug;moreover if… … Fig. 572—Two plug arrangement of ratio coils. Each of the ratio coils has one of its terminalsconnected to a common center which corresponds to the block marked C in the figure. Theother terminal of each coil is connected to an individual block, there being one block foreach coil. The bar B on one…
Electrical engineering
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