Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 322
ts in a severe though brief arc and often in the spattering of bitsof molten metal quite capable of igniting waste, shavings, etc. Theuse of circuit breakers instead of fuses is to be recommended forvery large currents and for all circuits such as many motor circuitswhere operating conditions are… … Fig. 147. Modern Oil Circuit Breaker former may be used on either d. c. or a. c. circuits. They havecopper blades and fixed contacts with carbon secondary contactsarranged to open just after the heavy copper contacts. Thus thecurrent is carried by copper parts of ample size when the breaker…
Electrical engineering
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