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Nameplate designations require interpretation
Low Voltage and Medium Voltage Transformers
Applies to larger Transformer types by SquareD/Scheider Electric
Cooling shorthand symbols are used on nameplates, rather than descriptions
These designations refer to the means by which heat is removed from the Transformer. ``AA`` refers to Ambient Air. This is the natural convection cooling of dry Tranformers. ``AA/FA`` refers to a Transformer that under lower loading conditions uses natural convection for cooling, but under heavier loading conditions, Forced Air ``FA``, typically accomplished the addition of motor driven fans, increases the rate at which heat is removed from the Transformer.
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