Are not the sensors generally immersed in the oil — losing oil might result in a delayed sensing of overheating, especially of the part of the transformer that is not in the oil.
41 posted on 12/28/2013 3:02:12 PM PST by HiTech RedNeck
(The Lion of Judah will roar again if you give him a big hug and a cheer and mean it. See my page.)