I have a transformer that is rated for an ambient of 40 C. My ambient is getting to about 46 C. I am not using the full capacity of the transformer. Since I am not operating the transformer at full capacity, is it reasonable to think that I can run at slightly higher ambients?
Derating Transformers
- Thread starter fifty60
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Schneider says yes
[h=1]If the average ambient temperature exceeds 30 degrees Celsius the derating factor is 0.4% reduction of VA for every degree Celsius above 30 degrees Celsius per IEEE C57 12.96. [/h]The IEEE formula that is used to derive the 0.4% factor is valid only up to an AVERAGE of 50 degrees Celsius. For average temperatures above that, consult the factory to supply a transformer designed for elevated ambient
http://www.schneider-electric.us/si...&country=US&lang=EN&id=FA126449&redirect=true
[h=1]If the average ambient temperature exceeds 30 degrees Celsius the derating factor is 0.4% reduction of VA for every degree Celsius above 30 degrees Celsius per IEEE C57 12.96. [/h]The IEEE formula that is used to derive the 0.4% factor is valid only up to an AVERAGE of 50 degrees Celsius. For average temperatures above that, consult the factory to supply a transformer designed for elevated ambient
http://www.schneider-electric.us/si...&country=US&lang=EN&id=FA126449&redirect=true
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If you have the right equipment and the calibration for the winding alloy, yes it should.
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