Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1268
h, with overload release.3 Current transformers.Three ammeters—one for each phase—are furnished foreach line, to facilitate the detection of unbalancing due toopen circuits or leakage. With balanced loads, the amme-ter pointers should show equal deflections under normalconditions. As the ammeters… … U tSta U;IM •*«■ II--_DI I D
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