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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
Low-voltage switchgear and controlgear—Part 8:Control units for built-in thermal protection(PTC) for rotating electrical machines
WITHDRAWN published on 14.9.2006
Selected format:Low-voltage switchgear and controlgear—Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
WITHDRAWN published on 29.8.2016
Selected format:Low-voltage switchgear and controlgear—Part 7-3:Ancillary equipment—Safety requirements for fuse terminal blocks
WITHDRAWN published on 30.12.2008
Selected format:Low-voltage switchgear and controlgear Low-voltage circuit breakers
WITHDRAWN published on 1.1.1994
Selected format:Low-voltage switchgear and controlgear—Low-voltage circuit breakers
WITHDRAWN published on 21.11.2001
Selected format:Low-voltage switchgear and controlgear—Part 2:Circuit-breakers
WITHDRAWN published on 19.9.2008
Selected format:Low-voltage switchgear and controlgear—Part 7-4:Ancillary equipment—PCB terminal blocks for copper conductors
WITHDRAWN published on 29.12.2017
Selected format:Low-voltage switchgear and controlgear Low-voltage switches, disconnectors, switch-disconnectors and fuse-combination units
WITHDRAWN published on 1.1.1993
Selected format:Low-voltage switchgear and controlgear—Part 3:Switches,disconnectors,switch-disconnectors and fuse-combination units
WITHDRAWN published on 13.6.2002
Selected format:Low-voltage switchgear and controlgear—Part 3:Switches,disconnectors,switch-disconnectors and fuse-combination units
WITHDRAWN published on 19.6.2008
Selected format:Latest update: 2026-07-30 (Number of items: 2 290 198)
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