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Standards GB - Chinese national standards - Page 8553
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
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GB 7251-1987
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WITHDRAWN published on 1.1.1987
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GB 7251.1-1997
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Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies
WITHDRAWN published on 30.12.1997
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GB 7251.1-2005
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Low-voltage switchgear and control gear assemblies—Part 1:Type-tested and partially type-tested assemblies
WITHDRAWN published on 29.7.2005
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GB/T 7251.1-2013
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Low-voltage switchgear and controlgear assemblies—Part 1:General rules
WITHDRAWN published on 31.12.2013
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GB/T 7251.10-2014
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Low-voltage switchgear and controlgear assembliesPart 10: Guidence to specifying assemblies
WITHDRAWN published on 22.12.2014
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GB/T 7251.12-2013
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Low-voltage switchgear and controlgear assemblies—Part 2:Power switchgear and controlgear assemblies
WITHDRAWN published on 31.12.2013
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GB 7251.2-1997
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Low-voltage switchgear and control gear assemblies—Part 2:Particular requirements for busbar trunking systems(busways)
WITHDRAWN published on 30.12.1997
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GB 7251.2-2006
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Low-voltage switchgear and controlgear assemblies—Part 2:Particular requirements for busbar trunking systems (busways)
WITHDRAWN published on 25.8.2006
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GB 7251.3-1997
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Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards
WITHDRAWN published on 30.12.1997
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GB/T 7251.3-2006
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Low-voltage switchgear and control gear assemblies—Part 3:Particular requirements for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use—Distribution boards
WITHDRAWN published on 25.8.2006
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