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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
Test and measurement procedures for electromechanical all-or-nothing relays
WITHDRAWN published on 1.1.1988
Selected format:Electrical relays—Part 7:Test and measurement procedures for electromechanical all-or-nothing relays
WITHDRAWN published on 2.8.1994
Selected format:Basic test method for electric-driving control gear assemblies
WITHDRAWN published on 22.12.1988
Selected format:Basic testing method for low-voltage switchgear and control gear assemblies
WITHDRAWN published on 6.2.2005
Selected format:General technical conditions of control panel for alternating current mobile electric power plant
WITHDRAWN published on 1.1.1988
Selected format:Arc welding transformer hazard reducing device
WITHDRAWN published on 3.1.2000
Selected format:Guide for evaluation ofinterference effects and compatibility technology between semiconductor convertors and power supply system
WITHDRAWN published on 22.12.1988
Selected format:Power transformers--Insulation levels and dielectric tests external clearances in air
WITHDRAWN published on 1.1.1988
Selected format:Oil well cement
WITHDRAWN published on 20.10.1998
Selected format:Oil well cement
WITHDRAWN published on 30.8.2005
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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