Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1309
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. 595partly assembled 25 cycle, 500 k. w., 20,000 to 375 volt TRANSFORMER Transformers 1275
