Since we started installing transformers with IFD’s, it is now much easier and faster to troubleshoot 3 ph overhead banks where a fault has occurred.
I had a case where I closed in on a faulted transformer, and it spilled oil all over an expensive car located below it. This was an expensive public relations problem for our utility.
Many of our transformers are located across far distances. This will help avoid wasting time going back and forth.