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 84
ready beenconsidered, there are varioussafety devices necessary in con-nection with the operation of cen-tral stations. One of the mostimportant of these is the liglit-ning arrester. For direct-currentwork, the lightning arrester oftentakes the form of a single gap con-nected in series with a high… … DOUSIE POLE RELAYC/RCU/T nOPMAL LYCLOSED. LOAD
Electrical engineering
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