Method of Estimating Overheating Temperature of Oil-Immersed Electric Appliance

The present invention is directed to a method of estimating an overheating temperature of an oil-immersed electric appliance in which ester oil is used as insulating oil. The overheating temperature is estimated based on a first concentration ratio representing a concentration ratio between two type...

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Bibliographische Detailangaben
Hauptverfasser:	HAYAMIZU, Shiki, KURIYAMA, Ryota, MIZUNO, Kota, KATO, Fukutaro
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY INDUCTANCES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MAGNETS MEASURING PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TESTING TRANSFORMERS
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Beschreibung
Zusammenfassung:	The present invention is directed to a method of estimating an overheating temperature of an oil-immersed electric appliance in which ester oil is used as insulating oil. The overheating temperature is estimated based on a first concentration ratio representing a concentration ratio between two types of gas components contained in the ester oil and a second concentration ratio representing a concentration ratio between other two types of gas components contained in the ester oil. The first concentration ratio and the second concentration ratio are selected from a concentration ratio between acetylene and ethane, a concentration ratio between acetylene and hydrogen, a concentration ratio between acetylene and methane, and a concentration ratio between acetylene and ethylene.