Westinghouse UTT On Load Tap Changer Failures
Westinghouse UTT On Load Tap Changer Failures
(OP)
Has there been documentation or studies done on the failure rate of the old Westinghoue 13.8kV UTT on load tap changers?
These are the units with arching type transfer switches.
I have two if these units in service built in 1967 and on 12MVA 69/13.8 transformes. Both with close to 400,000 operations. I would like to present the case to the owner to be thinking about replacing the units and would like to present some failure data.
Dan
These are the units with arching type transfer switches.
I have two if these units in service built in 1967 and on 12MVA 69/13.8 transformes. Both with close to 400,000 operations. I would like to present the case to the owner to be thinking about replacing the units and would like to present some failure data.
Dan






RE: Westinghouse UTT On Load Tap Changer Failures
RE: Westinghouse UTT On Load Tap Changer Failures
RE: Westinghouse UTT On Load Tap Changer Failures
That is a rather good riddle!!!!
The 69 kV line is an unregulated line and my swing 10 to 15 pecent.
If and LTC is on a transformer and left on one tap coking can form on the contacts.
Will vfd and 2300 volt motor tolerate a + - 15% swing?
What is the weather like?
D
RE: Westinghouse UTT On Load Tap Changer Failures