Thanks for the reply,
Unfortunately these transformers don't have any imbedded temperature sensors in them. I'm not sure if it is something that can be added or not.
The load on these transformers changes very little from day to day. I understand that as the load changes the temperature of the windings changes as well. There is also a delay between the temperature of the windings the oil and the case.
If the load stays consistent wouldn't the case temperature be very close to the oil temperature?
Jamey
