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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 relays—Part 22-1:Electrical disturbance tests for measuring relays and protection equipment—1 MHz burst immunity tests
WITHDRAWN published on 18.6.2008
Selected format:Electrical disturbance tests for measuring relays and protection equipment Part 2:Electrostatic discharge tests
WITHDRAWN published on 21.12.1998
Selected format:Measuring relays and protection equipment—Part 22-2:Electrical disturbance tests—Electrostatic discharge tests
WITHDRAWN published on 10.11.2010
Selected format:Electrical relays Part 8:Thermal electrical relays
WITHDRAWN published on 21.12.1998
Selected format:Electrical relays—Part 25:Electromagnetic emission tests for measuring relays and protection equipment
WITHDRAWN published on 25.11.2002
Selected format: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WITHDRAWN published on 26.8.2005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WITHDRAWN published on 23.1.2007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WITHDRAWN published on 29.6.2012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WITHDRAWN published on 23.1.2007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WITHDRAWN published on 5.9.1993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:Latest update: 2026-06-10 (Number of items: 2 281 585)
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