This standard specifies the terms and definitions, basic requirements, technical requirements, test methods, inspection rules, transportation, storage, installation, operation and maintenance rules, safety, product impact on the natural environment, quality and service of electromagnetic voltage transformers. promise. This standard is applicable to newly manufactured single-phase electromagnetic voltage transformers used for electrical measuring instruments and/or electrical protection and automation devices, with a frequency of 15 Hz to 100 Hz, and a maximum equipment voltage of 252 kV and below. The maximum equipment voltage is Newly manufactured three-phase electromagnetic voltage transformers for 40.5 kV and below.