Commercial Electrical Testing (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Commercial Electrical Testing

Iiican be readily obtained. The instruments used must be of the highest quality to insure accurate results, and must frequently be compared with reliable standards work for which a standardizing laboratory is necessary. All these matters must be kept in mind and a system provided for enforcing testing regulations for obtaining clear records of the work done. In short, the testing department is a complex organization whose keynote is efficiency. Economy of labor and power, and the arrangement of apparatus are of equal importance with accuracy; with the latter, of course, a sine qua non, since the majority of apparatus tested must meet specification as regards performance, heating, efficiency, and the like. When, as often happens, more than one method can be employed in a given case, the test must be chosen which yields the maximum of accuracy practicable, consistent with the character of the work.

These questions are fully considered in this little book and will appeal to all those having charge of similar departments, college laboratories, etc. To the student of engineering, however, the description of the various tests, their preparation, how they are carried out, the instruments used, and the diverse calculations required will appeal most strongly. Nearly all types of electrical machinery have been covered, and many examples have been given showing the kind of results that actually obtain in the more important cases, and the means employed for discovering electrical or mechanical faults.

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