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 1373
high voltages, which endangerthe insulation of the whole system, and which it is impossi-ble to detect on ordinary switchboard instruments mayexist. Abnormal voltages are therefore often found in cir- 1344 . Steam Engineering cuits containing a combination of underground^ and over-head circuits and… … ^^^^^^^^
