How is the winding temperature of a transformer filled with oil is calculated? since I believe no sensor is directly connected to the winding? Does the the current through a bushing contribute to the temperature value of winding? Any formulas for it?
In our plant, apart from lube oil system there is a Emergency DC Lube oil system. What i want to know is if there is a standard which defines the DC lube oil pump testing procedure? Does ASME or IEC or another standard tells us about its testing?