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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Functional evaluation of insulation systems for rotating electrical machines—Test procedures for form-wound windings—Thermal evaluation and classification of insulation systems used in machines up to and including 50 MVA and 15kV
WITHDRAWN published on 15.2.2006
Selected format:Functional evaluation of insulation systems for rotating electrical machines—Test procedures for form-wound windings—Electrical evaluation of insulation systems used in machines up to and including 50MVA and 15kV
WITHDRAWN published on 14.3.2006
Selected format:Rotating electrical machines—Functional evaluation of insulation systems—Test procedures for form-wound windings—Evaluation by electrical endurance
WITHDRAWN published on 24.2.2016
Selected format:Rotating electrical machines—Functional evaluation of insulation systems—Test procedures for form-wound windings—Multifactor functional evaluation—Endurance under combined thermal and electrical stresses of insulation systems used in machines up to and including 50MVA and 15kV
WITHDRAWN published on 3.12.2007
Selected format:Rotating electrical machine—Functional evaluation of insulation systems—Test procedures for form-wound windings—Evaluation of thermomechanical endurance of insulation systems
WITHDRAWN published on 3.12.2007
Selected format:Rotating electrical machines—Functional evaluation of insulation systems—General guidelines
WITHDRAWN published on 24.2.2016
Selected format:Tyre valve core
WITHDRAWN published on 2.12.1996
Selected format:Semiconductor converter--Part 6:Application guide for the protection of semiconductor converters against overcurrent by fuses
WITHDRAWN published on 3.1.2000
Selected format:Standard specifications for magnetically hard materials
WITHDRAWN published on 3.1.2000
Selected format:Standard specification for magnetically hard materials
WITHDRAWN published on 19.9.2005
Selected format:Latest update: 2026-04-30 (Number of items: 2 275 280)
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