This standard specifies the terms and definitions, product classification, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of single-phase power frequency high-voltage rectifier transformers (hereinafter referred to as rectifier transformers) for oil-immersed electrostatic precipitators. . This standard applies to single-phase power frequency high-voltage rectifier transformers for oil-immersed electrostatic precipitators.