Top Of The Class – The K-Class Transformer Fluid
KNAN, KNAF, ONAN, ONAF – what do they mean? Here’s how to unlock the cooling class code for liquid filled transformers. The ANSI/IEE Standard C57.12.00 defines a 4 character code to describe the cooling attributes of the transformer. The first letter refers to the main cooling medium (i.e. in contact with the windings). Decode as