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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
Electrical relay—Part 22-6:Electrical disturbance tests for measuring relays and protection equipment—Immunity to conducted disturbances induced by radio frequency fields
WITHDRAWN published on 26.8.2005
Selected format:Electrical relays—Part 22-5:Electrical disturbance tests for measuring relays and protection equipment—Surge immunity test
WITHDRAWN published on 23.1.2007
Selected format:Measuring relays and protection equipment—Part 22-5:Electrical disturbance tests—Surge immunity test
WITHDRAWN published on 29.6.2012
Selected format:Electrical relays—Part 22-7:Electrical disturbance tests for measuring relays and protection equipment—Power frequency immunity test
WITHDRAWN published on 23.1.2007
Selected format:Electrical relays—All-or-nothing electrical relays
WITHDRAWN published on 5.9.1993
Selected format:Measuring relays and protection equipment—Part 1:Common requirements
WITHDRAWN published on 30.12.2011
Selected format:Electrical relays—Part 26:Electromagnetic compatibility requirements for measuring relays and protection equipment
WITHDRAWN published on 23.1.2007
Selected format:Measuring relays and protection equipment—Part 26:Electromagnetic compatibility requirements
WITHDRAWN published on 11.9.2015
Selected format:Measuring relays and protection equipment—Part 27:Product safety requirements
WITHDRAWN published on 24.9.2008
Selected format:Measuring relays and protection equipment—Part 27:Product safety requirements
WITHDRAWN published on 1.11.2017
Selected format:Latest update: 2026-04-08 (Number of items: 2 271 105)
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