Title :
Experience with 550 kV current transformers
Author :
McDermid, W. ; Black, T.
Author_Institution :
Manitoba Hydro, Winnipeg, MB, Canada
Abstract :
At Manitoba Hydro the first 550 kV current transformers were placed in service in 1980 followed by additional units in 1994 and 2014. A total of three different designs are now in service. In-service failures or troubles occurred in 1986, 2004 and 2014. The paper summarizes what has been learned from the investigations.
Keywords :
current transformers; failure analysis; Manitoba Hydro; current transformers; in-service failures; voltage 550 kV; Current measurement; Nitrogen; Oil insulation; Oxygen; Power transformer insulation; EHV current transformers; electrical insulation;
Conference_Titel :
Electrical Insulation Conference (EIC), 2015 IEEE
Print_ISBN :
978-1-4799-7352-1
DOI :
10.1109/ICACACT.2014.7223491
