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Digest on Literature on Dielectrics Volume X (1947) / Chapter Skim
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Inslating Oils
Pages 106-110

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From page 106...
... However, the British Committee in 1937 found it advisable, as a result of experience with corrosion during deterioration, to Occupy acidity fcrrmation, partioularly with respect to the highly refined class "A' oils. As expected, the acidity development of the class nB" oils was in genera:L lower than that of the class aAN oil.
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From page 107...
... Data were presented to support the general premise that increasing the amount of sulfuric acid- refining riot only improves the sludge forming tendency of an oil, but when refining is increased beyond a certain point, eventually the acid forming tendencies of an oil increase. The genera: idea of adding selected aromatic extracts or known compounds to control the properties of the finished oil was regard deaf as a development which presents considerable opportunities for the production of better oils.
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From page 108...
... Cooperative tests have been continued to determine the correlation of data obtained ty D67~42T sludge tests arid other methods of Relic with performance in commercial transtormere. 4 Horsch3 reported in a series of three publications the results of an extended investigation of the oxidation properties of transformer oils.
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From page 109...
... The method eras suggested as an aid in following Ache ^~" of oxidation of cil ~ and to determine the state ct pi ty 0[ icing oils. cap ~e~ant6 Is ruble shed further data obtained from conductome Brie investigations of electrolytic solutions in hydrooart<:r:~ Oonsidex,~e data are preser~ted =~d analyzed [~r ~ possi.~e e~:~or~ of high conductivitles o~ served ire deteriorated Oils.
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From page 110...
... P., Assignor to Metal Hydrides Incorporated, U
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Key Terms

  • simulated field
  • metal hydrides
  • acidity development
  • acceptance test
  • oxidation products

  • condenser water
  • transformer oil
  • field service
  • insulating oils
  • sludge test

  • acid forming
  • occupy acidity
  • selected aromatic
  • ire deteriorated
  • methods approved

  • vary considerably
  • sludge formation
  • power factor
  • income teats
  • eras suggested

  • increased beyond
  • earth metal
  • impart oxidation
  • considerable amount
  • reviewed brieny

  • oil increase
  • accepted laboratory
  • predict accurately
  • principal contributions
  • aromatic extracts


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