This standard specifies the terms and definitions, product classification, technical requirements, test methods, inspection rules and markings, packaging, transportation and storage of metal expanders for oil-immersed instrument transformers. This standard applies to metal expanders used in various oil-immersed transformers, and also applies to expanders used in other oil-immersed electrical equipment. Non-metallic expanders may refer to this standard.
JB/T 7068-2002 history
2016JB/T 7068-2015 Metal expanders for instrument transformer
2002JB/T 7068-2002 Metal expanders for instrument transformer