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Code of China
Chinese National Standard List: Transformer

Q/GDW 149-2006 General specification for dry-type smoothing reactor of ±800kV HVDC system 
  Issued on:   Price(USD): 300.0
Q/GDW 170-2008 Guide for codition-based maintenance strategy of oil-immersed power transformer (reactor) 
  Issued on:   Price(USD): 180.0
GB/T 20840.15-2022 Instrument transformers―Part15:Additional requirements for voltage transformers for DC applications 
  Issued on: 2022-10-12   Price(USD): 555.0
GB/T 20840.14-2022 Instrument transformers―Part 14:Additional requirements for current transformers for DC applications 
  Issued on: 2022-10-12   Price(USD): 675.0
GB/T 1094.11-2022 Power transformers—Part 11: Dry-type transformers 
  Issued on: 2022-03-09   Price(USD): 720.0
GB/T 18494.2-2022 Convertor transformers—Part 2: Transformers for HVDC applications 
  Issued on: 2022-03-09   Price(USD): 615.0
GB/T 1094.14-2022 Power transformers—Part 14: Liquid-immersed power transformer using high-temperature insulation materials  
  Issued on: 2022-03-09   Price(USD): 720.0
GB/T 21419-2021 Transformers, power supplies, reactors and similar products—EMC requirements  
  Issued on: 2021-12-31   Price(USD): 345.0
GB/T 41135.1-2021 Current and voltage sensors or detectors,to be used for fault passage indication purposes―Part 1:General principles and requirements 
  Issued on: 2021-12-31   Price(USD): 930.0
GB/T 41135.2-2021 Current and voltage sensors or detectors,to be used for fault passage indication purposes―Part 2:System aspects 
  Issued on: 2021-12-31   Price(USD): 675.0
DL/T 574-2021 Guide for the operation and maintenance of tap-chargers in the power transformer  
  Issued on: 2021-04-26   Price(USD): 2280.0
GB/T 19212.11-2020 Safety of transformers,reactors,power supply units and combinations thereof—Part 11:Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V 
  Issued on: 2020-12-14   Price(USD): 270.0
GB/T 19212.24-2020 Safety of transformers,reactors,power supply units and combinations thereof—Part 24:Particular requirements and test for transformers and power supply units for construction sites 
  Issued on: 2020-12-14   Price(USD): 315.0
NB/T 10539-2021 Mining flameproof converter substation 
  Issued on: 2021-01-07   Price(USD): 285.0
GB/T 23753-2020 Technical parameters and requirements for 110 kV and above oil-immersed shunt reactors 
  Issued on: 2020-11-19   Price(USD): 690.0
GB/T 23755-2020 Three-phase site-combined power transformer 
  Issued on: 2020-11-19   Price(USD): 315.0
GB/T 20840.103-2020 Instrument transformers—Part 103：The use of instrument transformers for power quality measurement 
  Issued on: 2020-03-31   Price(USD): 1300.0
GB/T 20840.102-2020 Instrument transformers—Part 102: Ferroresonance oscillations in substations with inductive voltage transformers 
  Issued on: 2020-03-31   Price(USD): 690.0
GB/T 1094.15-2020 Power transformers—Part 15：Gas-filled power transformers  
  Issued on: 2020-03-31   Price(USD): 370.0
GB/T 17468-2019 Guide for choice power transformers 
  Issued on: 2019-12-10   Price(USD): 690.0
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