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 99
fault. Whenthe bridge is balanced, the unknown resistances may be readilydetermined by a simple equation. 518 HAWKINS ELECTRICITY In making the Varley loop test, the resistance of looped cable orconductors is measured, and then connected as in fig. 598, Close thebattery key and adjust R for… … X SffOUND -m r ii B*TTEi?V KV( I ^ ||. Fig. 598.—The Varley loop test. The diagram shows the various connections. X and Y arethe resistances of the cable between the fault and the points 1 and 2 respectively. L isthe resistance of the good and bad cable or X + Y. also, X divided by the resistance…
Electrical engineering
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