Yours truly up in the air at work taking care of a troublesome 7620/13,200 HV to 240/480 LV transformer bank. Already removed the center phase pot which burnt up and now taking care of cleaning up and making sure all the connections on the high side as well as the low side are tight. Can't forget those all important tank grounds which can cause havoc on a 480 volt bank! Just another day in the air!