Stationary induction apparatus containing uninflammable insulating liquid
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United States of America Patent
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-
Aug 9, 1994
Grant Date -
N/A
app pub date -
Apr 30, 1992
filing date -
May 9, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An nonflammable insulating liquid is obtained by adding an emulsifying agent having a volume ratio of 1 to 3% to an insulating liquid containing a fluorocarbon liquid of at least 25% in a volume ratio to cause emulsification. In this liquid mixture, when polyol ester or dimethylcyloxane is used as the insulating liquid, an nonflammable insulating liquid that does not cause pollution or an environmental problem can be obtained. When tricresyl phosphate is used as the insulating liquid, an nonflammable insulating liquid having a dielectric constant close to that of insulating paper can be obtained. A liquid pipe for circulating a fluorocarbon emulsion in a tank is provided outside the tank, and a pump and a stirrer are connected midway along the liquid pipe to constantly stir the fluorocarbon emulsion, thereby preventing it from being separated into two layers. When a radiator is provided to the liquid pipe, the stirring system for the fluorocarbon emulsion can also serve as the cooling system.
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