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In Low Voltage Transformer specifications, what is meant by ``Class AA``?

What does Class AA mean on Low voltage transformers?

Product Line:
LV Transformers

Applies to Low Voltage Transformers by SquareD/Schneider Electric

Transformers can have AA or FA specifications on the nameplate


Class AA indicates that the Transformer is cooled by Ambient Air.   SquareD/Schneider Electric Low Voltage Dry Transformers are ventilated by means of air cooling.
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