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Are there Altitude Derating tables for the XT series overload relays?

No, the XT series bimetallic and electronic overload relays have a maximum altitude rating of 2000m with no derating. This is shown in the technical data section of volume 5 tab 1 in the online catalog. 

http://www.eaton.com/Eaton/ProductsServices/Electrical/Support/Documentation/Catalogs/Volume5/index.htm

 

Are there altitude derating tables for the XT series contactors and manual motor circuit protectors?