What's the real difference between 115 degree temperature rise transformer compared to a 150 degree temperature rise transformer? Is the only concern heat loss because the full load heat loss difference is only about 100 watts when comparing these two temperature rises using a 45 KVA transformer. Am I missing something?
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Transformer temperature rise
- Thread starter cppoly
- Start date
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
What destroys transformers is heat. The cooler a transformer runs the longer it lasts.
Heat loss by an indoor transformer is heat that needs to be removed by the HVAC system.
Heat loss by an indoor transformer is heat that needs to be removed by the HVAC system.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Yes it does.This appears to be very minimal
For maximum energy saving installs we used to specify 80°C temp rise.
Some time in the early 2000s, the Department of energy determined most small dry typ transformers were only loaded to 35%. This resulted in new requirements for transformer efficiency, which negated some of the difference between 150°C and other designs like 115°C.