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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 5-2: Control circuit devices and switching elements—Proximity switches
Execute Date: may 2026
Standard published on 31.10.2025
Selected format:Low-voltage switchgear and controlgear—Part 6-1: Multiple function equipment—Transfer switching equipment
Standard published on 25.4.2024
Selected format:Low-voltage switchgear and controlgear—Part 4-3: Contactors and motor-starters—AC semiconductor controllers and contactors for non-motor loads
Standard published on 13.12.2016
Selected format:
Low-voltage switchgear and controlgear—Part 4-3: Contactors and motor-starters—Semiconductor controllers and semiconductor contactors for non-motor loads
Execute Date: may 2026
Standard published on 31.10.2025
Selected format:Low-voltage switchgear and controlgear—Part 5-3: Control circuit devices and switching elements—Requirements for proximity devices with defined behaviour under fault conditions (PDDB)
Standard published on 29.9.2017
Selected format:Low-voltage switchgear and controlgear—Part 5-5: Control circuit devices and switching elements—Electrical emergency stop device with mechanical latching function
Standard published on 4.6.2019
Selected format:Low-voltage switchgear and controlgear - Part 5-6: Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers(NAMUR)
Standard published on 9.11.2006
Selected format:Low-voltage switchgear and controlgear—Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
Standard published on 29.8.2016
Selected format:
Low-voltage switchgear and controlgear—Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
Execute Date: july 2026
Standard published on 31.12.2025
Selected format:Low-voltage switchgear and controlgear - Part 5-4: Control circuit devices and switching elements - Methord of assessing the performance of low-energy contacts - Special tests
Standard published on 30.12.2008
Selected format:Latest update: 2026-04-08 (Number of items: 2 271 105)
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