This national standard specifies the terms and definitions, model and meaning, working conditions and basic parameters, technical requirements, test items, test methods, mark, packaging, transportation, storage as well as product documentation etc. of the electronic thermo-controllers for transformers for transformers (hereinafter referred to as "thermo-controllers").
This standard is applicable to the electronic thermo-controllers which observe and control the winding temperature of dry-type transformers with their rated voltage of the transformers' low-tension winding of 1kV or lower and oil temperature of oil-filled transformers.
