Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 371
as that shown in Fig. 405 are not 23 346 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap, xli intended to open while current is flowing but are used to discon-nect apparatus once the circuit has been opened by an oil switch.Such disconnecting switches are opened and closed by a long stickwith a hook… … Fig. 413.—Motor-operated, triple-pole oil switch. stresses on the pin become excessive, so that the suspension typeof insulator has to be used and these are generally suspended fromsteel towers as shown in Fig. 415. To protect the line from lightning, it is usual to run a steel wireparallel to the…
Electrical engineering
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