Title :
Proposals for an improvement in transformer diagnosis using dissolved gas analysis (DGA)
Author :
Kan, Hisao ; Yamoto, Terumoi
Author_Institution :
Optec Dai-Ichi Denko Co. Ltd., Tokyo, Japan
Abstract :
The diagnosis of oil-immersed transformers using the dissolved gas analysis (DGA) technique has been well accepted and widely used. IEC Publication 599 touches on the diagnosis of faults involving paper insulation based on the ratio of CO 2/CO. It states that a fault involving paper insulation is probable when the CO 2/CO ratio is 3 or lower; we would like to propose a figure of 10.
Keywords :
chemical analysis; fault diagnosis; insulation testing; paper; power transformer insulation; power transformer testing; transformer oil; CO; CO/sub 2/; CO/sub 2//CO ratio; IEC Publication 599; dissolved gas analysis; fault diagnosis; oil-immersed transformers; paper insulation; Absorption; Dissolved gas analysis; Fault diagnosis; Fluctuations; Gas insulation; Oil insulation; Petroleum; Power transformer insulation; Proposals; Temperature;
Journal_Title :
Electrical Insulation Magazine, IEEE
