An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 539
e 337 is simplya large switch which is auto-matically opened by an elec-tromagnet when the currentis excessive. The advantageof the circuit breaker overthe fuse as a safety deviceis that it is very prompt inaction, and when once ad-justed it is opened by a current of a perfectly definite… … Terminal Lug Fig. 337. — A medium-capacity double- pole circuit breaker (250 volts,amperes). 200 ELECTRIC HEATING 483 There are many forms of circuit breakers now on the market,but in practically all of them the closing of the switch putsin action a strong spring which tends to open it. The…
Electricity · Magnetism
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