The effect of lubricating oil on the puncture strength of paper insulation

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dc.contributor.authorKoslow, Herman M.en
dc.contributor.committeememberMurray, W. A.en
dc.contributor.committeememberNorris, Earle Bertramen
dc.contributor.committeememberO'Shaughnessy, Louisen
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:37:21Zen
dc.date.adate2012-06-09en
dc.date.available2014-03-14T21:37:21Zen
dc.date.issued1939-06-05en
dc.date.rdate2012-06-09en
dc.date.sdate2012-06-09en
dc.description.abstractDue to the fact that only comparative results were sought, the investigation was greatly simplified. On a comparative basis, the effects of external influences were largely eliminated from positions of vital importance and the use of an elaborate test, circuit was unnecessary. The equipment consisted of a high-voltage test transformer which supplied the test voltage; an induction regulator, auto transformer and generator field rheostats for voltage control; overload relay and aircore inductances for circuit protection; motor-generator set for a source of 60 cycle alternating voltage. The electrodes were circular, square edge brass discs. Specimens were immersed in lubricating oil for periods up to 40 hours and then tested for puncture strength. Following this, specimens were immersed for one hour and 24 hours and each of the two groups tested at intervals of time up to 720 hours. In each test the voltage was raised in steps of 200 volts, starting at 1000 volts. The puncture strength of the untreated paper was determined by testing a sufficient number of specimens over a period of days. The results obtained indicated no immediate deleterious effects of lubricating oil on paper. On the contrary, there was an improvement in puncture strength, accounted for by the fact that the relatively low voltages-used did not make ionization a serious factor. The results of tho long-time tests were unsatisfactory, as explained previously. However, they did permit the conclusion that deterioration of paper impregnated with lubricating oil would become apparent much sooner than if insulating oil were used. Oxidation, although probably existing, was apparently too slow to affect the results.en
dc.description.degreeMaster of Scienceen
dc.format.extent2 unnumbered pages, 30 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06092012-141024en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06092012-141024/en
dc.identifier.urihttp://hdl.handle.net/10919/42965en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1939.K674.pdfen
dc.relation.isformatofOCLC# 28869687en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1939.K674en
dc.subject.lcshInsulating paper -- Testingen
dc.subject.lcshLubricating oilsen
dc.titleThe effect of lubricating oil on the puncture strength of paper insulationen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Agricultural and Mechanical College and Polytechnic Instituteen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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