GB/T 20840.4-2015
ActiveInstrument transformers—Part 4：Additional requirements for combined transformers
互感器 第4部分：组合互感器的补充技术要求
Application Summary AI generated
This standard specifies additional technical requirements, testing methods, and accuracy classes for combined instrument transformers, which integrate both voltage and current transformation functions into a single unit. It is applied in the design, manufacturing, and verification of combined transformers used in high-voltage power systems for metering, protection, and control applications. The standard ensures reliable performance and safety in electrical substations and industrial power distribution networks.
Related Standards
GB/Z 1094.14-2011
Power transformers - Part 14: Design and application of liquid-immersed transformers using high-temperature insulation material
GB/Z 34935-2017
Technical specifications for oil-immersed smart power transformers
GB/Z 20840.100-2023
Instrument transformers—Part 100： Guidance for application of current transformers in power system protection
GB/T 1094.10-2003
Power transformers--Part 10: Determination of sound levels
GB/T 1094.3-2003
Power transformers--Part 3: Insulation levels，dielectric tests and external clearances in air
GB/T 13499-2002
Power transformer--Application guide
GB/T 6451-1999
Specification and technical requirements for three-phase oil-immersed power transformers
GB/T 8554-1998
Transformers and inductors for use in electronic and telecommunication equipment--Measuring methodsand test procedures
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.