OVERHEAT TEMPERATURE ESTIMATION METHOD IN ABNORMALITY DIAGNOSIS OF MACHINERY CONTAINING OIL

PROBLEM TO BE SOLVED: To provide a technology for estimating an overheat temperature of a machinery containing an oil.SOLUTION: An overheat temperature estimation method in an abnormality diagnosis of a machinery containing an oil is a method for estimating an overheat temperature of a machinery containing an oil by analyzing an in-oil gas of an inspection object ester base insulating oil stored in the machinery containing the oil. An equation of (1)...a gas A/a gas B=b*e(provided that the gas A is an amount of one or two specific gases from among a CHgas, a CHgas, a CHgas, a CHgas, a gas CHgas, a Cgas, and a Cgas, and the gas B is the amount of the other one or a plurality of specific gasses, and (a) is a constant number, (b) is the constant number, and t shows an overheat temperature (°C) )is laid down. With the constants (a) and (b) obtained in advance by calculation by presuming a locally heated temperature as the overheat temperature of the equation (1), a value of the gas A/the gas B is obtained by the in oil gas analysis of the insulating oil collected from an inspection object in-oil machinery, and the overheat temperature of the inspection object in-oil machinery is calculated.SELECTED DRAWING: Figure 1 【課題】本発明は油入機器の過熱温度を推定する技術の提供を目的とする。【解決手段】本発明は、油入機器に収容されている検査対象エステル系絶縁油の油中ガスを分析することにより油入機器の過熱温度を推定する方法であり、予め未使用のエステル系絶縁油を不活性ガス雰囲気中で局所加熱して測定温度毎に検出した複数のガスの内、ガスＡ／ガスＢ＝ｂ・ｅａ・ｔ...（１）の関係式（但し、ガスＡはＣＨ４ガスとＣ２Ｈ６ガスとＣ２Ｈ４ガスとＣ３Ｈ６ガスとＣ３Ｈ８ガスとＣ２ガスとＣ３ガスの内、１つ又は２つの特定のガスの量、ガスＢは他の１つ又は複数の特定のガスの量、ａは定数、ｂは定数、ｔは過熱温度（℃）を示す。）を策定し、局所加熱した温度を前記（１）式の過熱温度と仮定して予め定数ａ、ｂを計算により求めておき、検査対象油入機器から採取した絶縁油の油中ガス分析によりガスＡ／ガスＢの値を求め、検査対象油入機器の過熱温度を算出する。【選択図】図１