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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
Uninterruptible power systems (UPS) - Part 2: Electromagnetic compatibility (EMC) requirements
Standard published on 6.5.2009
Selected format:
Uninterruptible power systems (UPS)—Part 2: Electromagnetic compatibility (EMC) requirements
Execute Date: october 2026
Standard published on 31.3.2026
Selected format:Uninterruptiblepower systems(UPS)--Part 3:Method of specifying the performance and test requirements
Standard published on 21.2.2003
Selected format:Uninterruptible power systems (UPS)—Part 3: Method of specifying the performance and test requirements
Standard published on 29.6.2024
Selected format:Uninterruptible power systems(UPS)—Part 4:Environmental aspects—Requirements and reporting
Standard published on 14.12.2020
Selected format:Uninterruptible power systems (UPS)—Part 5-3: DC output UPS—Performance and test requirements
Standard published on 14.12.2020
Selected format:Basic testing method for relaying protection and security automatic equipment
Standard published on 24.2.2016
Selected format:
Basic testing method for relaying protection and security automatic equipment
Execute Date: february 2027
Standard published on 2.7.2026
Selected format:Technical requirement and equipment arrangement for highway communication
Standard published on 29.8.2025
Selected format:Test method for complex permittivity of solid dielectric materials at microwave frequencies--Perturbation method
Standard published on 13.2.1987
Selected format:Latest update: 2026-08-04 (Number of items: 2 291 378)
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