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 1303
not burn in open air un-less its temperature is first raised to about 400° F. Infact, the chief danger of fire is not that the oil may beignited by any defect or arc within the transformer, butthat a fire in the building in which the transformers areinstalled may so heat the oil as to cause it to… … Fig. 595 PARTLY ASSEMBLED 25 CYCLE, 500 K. W., 20,000 TO 375 VOLTTRANSFORMER Transformers 1275
