DIAGNOSING METHOD OF INSULATION DETERIORATION OF SILICONE OIL FOR ELECTRICITY

PURPOSE:To obtain sufficiently precise data without requiring skillfulness by measuring heat weight characteristics of silicone oil for electricity, finding a heat resistance index TGI from the characteristic curve, and deciding on deterioration when the index decreases below a specific value. CONST...

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Bibliographic Details
Main Authors AKIYAMA KENICHI, ISO MASATOSHI, UMEMURA TOKIHIRO
Format Patent
LanguageEnglish
Published 06.10.1984
Subjects
BASIC ELECTRIC ELEMENTS
CABLES
CONDUCTORS
ELECTRICITY
INSULATORS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
TESTING
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Summary:PURPOSE:To obtain sufficiently precise data without requiring skillfulness by measuring heat weight characteristics of silicone oil for electricity, finding a heat resistance index TGI from the characteristic curve, and deciding on deterioration when the index decreases below a specific value. CONSTITUTION:The heat weight characteristics of silicone oil for electricity which deteriorates are measured to obtain the curve as shown in a figure. Then, a 10% weight decrease point and a 20% weight decrease point are connected by a straight line; and the temperature where the straight line crosses a base line (0% weight decrease line) is denoted as T1 and the temperature at the 20% weight decrease point is denoted as T2to calculate the heat resistance index TGI by TGI=(T1+T2). When the TGI of the silicone oil for electricity is calculated by using said equation, results in a table are obtained; when the silicone oil deteriorates, the TGI decreases and a decision on deterioration is made when the TGI decreases below 325. Therefore, sufficiently precise data is obtained without skillfulness.
Bibliography:Application Number: JP19830050483