14400:120 PT fuse change
14400:120 PT fuse change
(OP)
silly question from a green horn. anyone familiar with a load break device to pull this fuse hot? or would the common recommendation be to take an outage. this is on a manufacturing facility that would love to avoid an outage.
also, what have you seen as likely causes for PT fuses to blow?
thanks in advance.
also, what have you seen as likely causes for PT fuses to blow?
thanks in advance.






RE: 14400:120 PT fuse change
For outdoor applications I have seen hot stick removal.
What kind of PT and where is it located? Have you made any attempt to determine why the fuse is blowing? I would not want to be the person inserting a fuse into a faulted PT.
See the recent thread http://eng-tips.com/viewthread.cfm?qid=320853
on the possible reasons for a blown fuse.
RE: 14400:120 PT fuse change
RE: 14400:120 PT fuse change
RE: 14400:120 PT fuse change
It's impossible to tell if it's a fuse failure or a problem originating from the VT itself. Closing a fuse into a damaged/faulty VT could be dangerous.
Need to check out the VTs prior to trying to re-energize, e.g. megger test, ratio test, and possibly excitation test (if you have comparative results).