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 61
stances, and one that is convenient for practicalwork in electrical stations because it requires only an ammeter,voltmeter, battery and switch—apparatus to be found in everystation. The connections are made as shown in fig. 555. In making the test the ammeter and voltmeter readings aretaken at the… … SWITCH Fig. 555.—Fall of potential method of testing resistances; a convenient method for testing atstations, requiring only the usual instruments to be found at a station. The resistanceof the voltmeter must be verj- high, otherwise the test must be made as in fig. 556. EXAMPLE.—If in fig. 555 the…
Electrical engineering
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