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 382
the generator, because 342 WELDING 49 it is a constant voltage machine, by adding enough circuit-controlHngrehiys and contactors. The advantage in this system Hes in havingan automatic rehiy for cutting in the protecting resistance, insteadof allowing the overload to become heavy enough to injure… … Fig. 69. Portable WeldingTOutfitCourtesy of General Electric Company effect of the rush of current when drawing the arc, and inthe necessity of using a time-limit relay for the overload coil.It is evident that, if an instantaneous relay is used, it willopen every time the current reached a certain…
Electrical engineering
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