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What is the operating temperature range of a 9070T transformer ?

CPT Operating temperature

Product Line:
Control Transformers




There is no tested lower operating temperature limit but it should not be put  it in an environment  less than -20°C
The upper limit is defined. The maximum average ambient air temperature cannot exceed a 30°C average (with a 40°C max in a 24 hour period)
Note also: 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.
The IEEE formula that is used to derive the 0.4% factor is only good up to an AVERAGE of 50 degrees Celsius. For average temperatures above that, consult the factory to supply a transformer designed for elevated ambient.
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