GB/T 24277-2009
AbolishedA method for assessing the short-circuit withstand strength of partially type-tested assemblies (PTTA)
评估部分型式试验成套设备（PTTA）短路耐受强度的一种方法
Application Summary AI generated
This standard specifies a calculation and verification method for determining the short-circuit withstand strength of partially type-tested assemblies (PTTA), which are low-voltage switchgear and controlgear assemblies that combine type-tested components with non-tested arrangements. It is applied in electrical engineering for manufacturers and testing laboratories to validate the mechanical and thermal robustness of PTTA under fault current conditions without full-scale testing. The method enables compliance with safety requirements in industrial, commercial, and residential power distribution systems.
Related Standards
GB/T 19334-2003
Dimension of low-voltage switchgear and controlgear--Standardized mounting on rails for mechanical support of electrical devices in switchgear andcontrolgear installations
GB/Z 40776-2021
Low-voltage switchgear and controlgear—Fire risk analysis and risk reduction measures
GB/Z 41909-2022
Low-voltage switchgear and controlgear—Electromagnetic compatibility assessment for switchgear and controlgear and their assemblies
GB/Z 41912-2022
Low-voltage switchgear and controlgear—Guidance for the development of embedded software
GB/Z 43029-2023
Switchgear and controlgear and their assemblies for low-voltage—Energy efficiency
GB/Z 43030-2023
Low-voltage switchgear and controlgear—Security aspects
GB/Z 43533-2023
Integration of internal arc-fault mitigation systems in power switchgear and controlgear assemblies (PSC-assemblies) according to GB/T 7251.2—2023
GB/Z 14048.24-2024
Low-voltage switchgear and controlgear—Part 7-5: Ancillary equipment—Terminal blocks for aluminium conductors
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.