Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1335
Westinghouse oil switches are essentially knifeswitches immersed in oil, the blades being connected to acommon operating lever by specially treated wooden rods.The knife-blade contacts are used, as they give the mostperfect contact and therefore the lowest temperature rise. Fig. 604 shows a… … Fig. 606 sealed bushings as shown. Fig. 606 shows the same switchwith the oil tank removed. Fig. 607 shows the Westing-house type B oil circuit-breaker, designed for potentialsfrom 3,300 to 22,000 volts, and currents from 300 to 1,200amperes. This device is a double-break, oil circuit-breaker.It…
