d. If, on marble slabs, for any reason, upon three sides the high potential of a wooden frame circuit-breakers in set on rollers. the lightning ar- Thus, in case of rester room do not total di sability, act under short the lightning ar- circuit, the emer- rester may be gency switch upon rolled out… … tions to the end. 4.—Step-Up Transformers, 2,500 Horse Power Each, for Union Carbide Company. switches and cir- Several feet cuit-breakers, pass above these pan- RECENT DEVELOPMENTS AT THE NIAGARA FALLS POWER PLANT. directly to the els are the choke transformers, which take on their low-tension…
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