This standard specifies the terms and definitions, usage conditions, performance parameters, technical requirements, test items, test methods and requirements, marking, lifting, packaging, transportation and storage of 750kV and 1000kV single-phase oil-immersed power transformers (transformers for short) and installation and safety. This standard applies to single-phase oil-immersed power transformers with voltage levels of 750kV and 1000kV and rated frequency of 50Hz.
NB/T 42020-2013 Referenced Document
GB 1094.1 Power transformers.Part 1: General*， 2013-12-17 Update
GB 1094.2 Power transformers.Part 2:Temperature rise for liquid-immersed transformers*， 2013-12-17 Update
GB 1094.3 Power transformers Part 3: Insulation levels,dielectric tests and external clearances in air
GB 1094.5 Power transformers.Part 5:Ability to withstand short circuit
GB/T 1094.10 Power transformers— Part 10：Determination of sound levels*， 2022-10-14 Update
GB/T 1094.7 Power transformers.Part 7: Loading guide for oil-immersed power transformers
GB/T 11604 Testing procedure of radio interference generated by high voltage equipment*， 2015-09-11 Update
GB/T 26218.2 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions.Part 2:Ceramic and glass insulators for a.c.systems
GB/T 2900.15 Electrotechnical terminology. Transformer, instrument transformer, voltage regulator and reactor