Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 189
are illustrated in theaccompanying cuts. Man-agers of electric power andlighting companies shouldstudy them carefully. 772.4 XS FORMERS 1,447 An ammeter, voltmeter and wattmeter are required to makethe tests. Losses are small in good transformers and hence theinstruments should be accurate. For the… … Fig. 2.016.—Moloney tubular air draft oil filled transformer. The case is made of cast iron,with large steel tubes passing from the bottom through the top. In operation the air inthe tubes becomes hot and expands; a draft is thus produced which carries away con-siderable heat. used. The testing…
Electrical engineering
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