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 82
d with iron ends for securing the different parts. Ateach end of the insulator board is an upright or lifting board which serves tcswitching mecnanism out of the tank. The leads are heavily insulated. SWITCHING DEVICES 1,601 Ques. What are the objections to this type of switch? Ans. The… … Pig. 2.221.—Sectional view of Pacific weatherproof oil switch for use in places exposed tothe weather. All moving and contact parts are supported from the cast iron top andare readily removable for inspection or repair Oil Switches.—The extensive use of high pressure currentsand alternating current…
Electrical engineering
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