The Locomotive . h de-vices for a given ma-chine or circuit shouldbe of the same underlying causeof failure of the motor herein illustrated was, of course, seizing ot theshaft due to softening of the babbit by the heat of friction. For electricalmachinery it is important to select only the best grade of mineral oil ofa density that will allow the oil rings to pick it up and carry it much oil should be avoided, for an excess may be drawn into thewindings where it will cause deterioration of the insulation, collect dustand dirt, and eventually bring about a short-circuit
The Locomotive . h de-vices for a given ma-chine or circuit shouldbe of the same underlying causeof failure of the motor herein illustrated was, of course, seizing ot theshaft due to softening of the babbit by the heat of friction. For electricalmachinery it is important to select only the best grade of mineral oil ofa density that will allow the oil rings to pick it up and carry it much oil should be avoided, for an excess may be drawn into thewindings where it will cause deterioration of the insulation, collect dustand dirt, and eventually bring about a short-circuit. The proper amount of oil may be maintained by keeping the leveljust below the top of the overflow cups. Oil should never be addedwhile the machine is in operation, for at that time a great deal of oil isbeing carried by the rings and the apparent level in the cup is a falseone. Should the cup be filled while the shaft is revolving, it will over-flow when the machine is stopped and the oil drains from the 8o THE LOCOMOTIVE July, Broken Blade Wrecks Turbo-Generator SUDDEN breaking of blades, probably caused by a slug of watercoming through with the steam, led to the destruction of a 4,000kw. turbo-generator at the plant of Indianapolis Power and LightCompany at Indianapolis, Indiana, on April 28th of this year. Whenthe clear, ringing hum of the smooth-running turbine suddenly changedto an ominous rumbling, attendants attempted to avert an accident by
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Keywords: ., bookauthorhartfordsteamboilerin, bookcentury1800, bookdecade1860
