High stress electrical oil
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United States of America Patent
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-
Apr 10, 2001
Grant Date -
N/A
app pub date -
May 21, 1999
filing date -
May 21, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oil composition useful as a high stress electrical oil and especially as a transformer load tap changer oil is provided. The composition comprises a major amount of a paraffinic oil having a low viscosity of less than about 20 cSt @ 40.degree. C. and an effective amount of an additive system including at least one hindered phenolic antioxidant and a benzotriazole metal deactivator.
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