This standard specifies the performance parameters, technical requirements, inspection rules and methods, marking, packaging, transportation, and storage of three-phase dry type power transformers. This standard applies to three-phase dry type power transformers with voltage levels of 6 kV, 10 kV, 20 kV, and 35 kV, rated frequency of 50 Hz, rated capacity of 30 kV · A~25 000 kV · A, for indoor use with no excitation voltage regulation or on load voltage regulation. Other products with rated capacity can refer to the use of this standard. This standard does not apply to gas-filled transformers. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 191 Packaging, Storage and Transportation Graphical Symbols GB 1094.1 Power Transformers Part 1: General GB 1094.11 Power Transformers Part 11: Dry type Transformers GB/T 1094.12 Power Transformers Part 12: Load Guidelines for Dry type Power Transformers GB/T 2900.95 Electrotechnical Terminology Transformers Voltage Regulators and Reactors GB/T 5273 Terminals for Transformers, High Voltage Appliances, and Bushings GB/T 5465.2 Graphical Symbols for Electrical Equipment Part 2: Graphical Symbols JB/T501 Test Guidelines for Power Transformers JB/T 100886 kV~500 kV Power Transformers Sound Level 3 Terms and Definitions GB 1094.1, GB 1094.11, and GB/T 2900.95 are applicable to this document
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