GB/T 20840.4-2015
Instrument transformers—Part 4：Additional requirements for combined transformers
2023-05
- Standard No.
- GB/T 20840.4-2015
- Language
- Chinese
- Release Date
- 2015
- Published By
- 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会
- Replace By
- GB/T 20840.14-2022
- Lastest
- GB/T 20840.14-2022
GB/T 20840.4-2015 history
- 2022 GB/T 20840.14-2022 Instrument transformers—Part 14：Additional requirements for current transformers for DC applications
- 2015 GB/T 20840.4-2015 Instrument transformers—Part 4：Additional requirements for combined transformers
GB/T 20840.4-2015 -All Parts
GB/T 20840.1-2010 Instrument transformers-Part 1:General requirements
GB/T 20840.102-2020 Instrument transformers—Part 102: Ferroresonance oscillations in substations with inductive voltage transformers
GB/T 20840.103-2020 Instrument transformers—Part 103：The use of instrument transformers for power quality measurement
GB/T 20840.14-2022 Instrument transformers—Part 14：Additional requirements for current transformers for DC applications
GB/T 20840.15-2022 Instrument transformers—Part 15：Additional requirements for voltage transformers for DC applications
GB/T 20840.2-2014 Instrument transformers―Part 2: Additional requirements for current transformers
GB/T 20840.3-2013 Instrument transformers—Part 3: Additional requirements for inductive voltage transformers
GB/T 20840.4-2015 Instrument transformers—Part 4：Additional requirements for combined transformers
GB/T 20840.5-2013 Instrument transformers.Part 5:Additional requirements for capacitor voltage transformers
GB/T 20840.6-2017 Instrument transformers—Part 6:Additional general requirements for low-power instrument transformers
GB/T 20840.7-2007 Instrument transformer Part 7: Electronic voltage transformers
GB/T 20840.8-2007 Instrument transformers Part 8: Electronic current transformers
GB/T 20840.9-2017 Instrument transformers—Part 9:Digital interface for instruments transformers