Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 421
Type B, Oil Circuit Breaker, Switchboard Mounting (Front View). Fig. 299. 412 DYNAMOS AND MOTORS. Circuit breakers for high voltage alternating-current circuitsare usually arranged to open the circuit under oil. Thus, Figs.299 and 300 show the front and rear views of an automatic oilswitch (circuit… … Fig. 300. open, and Fig. 300 shows the essential parts of the switch. Thisparticular switch is a three-phase single-pole switch, that is tosay, it is three separate single-pole switches one for each phaseof a three-phase system, and each switch breaks under oil. Oneof the oil vessels is shown…
Dynamos · Electric motors
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