Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 370
act as a safety valve and aluminium arrestersare made up in the form shown in Fig. 411, about 300 volts perpair of plates being allowed. Even with 300 volts between plates, a small current flows, toprevent which, the arrester is connected to the line through ahorn gap as shown in Fig. 404. When the… … Fig. 412.—Hand-operated, triple-pole oil switch. 373. Switches.—Oil switches such as that shown in Fig. 412are used to rupture the current in high-voltage lines. Theseswitches are generally kept at a distance from the operator andare opened and closed through a system of levers, or may be of…
Electrical engineering
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