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What is a K1 rating on a dry type Transformer?

FA96745

23 January 2021

Issue:
K rated Transformers

Product Line:
LV Transformers

Environment:
Applies to Low Voltage Transformers by SquareD/Schneider Electric

Cause:
Non Linear loads

Resolution:
The Transformer industry does not typically use a `K1` rating.  Rather it is a non-recognized term that some consultants, OEMs and contractors use  to denote a Transformer that will only be feeding Linear loads such as motors, compressors, solenoids, heaters, etc.   In other words, K1 refers to a Transformer that does not have a  `K` rating such as K4, K9, K13, K20.