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<br /> <br />/'33,4 0 <br />-- <br /> <br />02-01-88 <br /> <br />SUBSTATION MAINTENANCE <br />INTERVAL AND GUIDELINES <br /> <br />APPARATUS: <br /> <br />Transformers - Current, Free Standing <br /> <br />Description: <br /> <br />Inspection <br /> <br />--!intenance Interval: Not to exceed six years <br /> <br />:atails: <br /> <br />I. Power factor test. <br /> <br />II. Ratio test. <br /> <br />III. <br /> <br />oil <br />A. <br />B. <br />C. <br />D. <br /> <br />test. <br />Interfacial tension. <br />Dielectric breakdown. <br />Power factor. <br />Hydrogen content. <br /> <br />IV. Inspect the porcelain and clean if needed. <br /> <br />. <br /> <br />V. Verify continuity between the grounds on the current transformer <br />and the structures in the current transformer bay and a structure <br />not associated with the current transformer bay. <br /> <br />('Ri~ed fL;;.~/ ~~~~\)).~ <br /> <br />~iohn Dismuke Richard Ko~lski <br /> <br />~~~./ ~~ ?c::::- <br />/Revie~d ~ <br />James Kyle <br /> <br />tiewed & Revised February 1991 <br /> <br />