GB/T 21971-2008
AbolishedTechnical specification for YZD range of multi-speed three-phase induction motors for crane application
YZD系列起重用多速三相异步电动机技术条件
Application Summary AI generated
This standard specifies the technical requirements, test methods, inspection rules, and marking for the YZD range of multi-speed three-phase induction motors. It is applied in crane and hoisting machinery applications, where the motors must provide variable speed control for lifting, traversing, and lowering operations under demanding industrial conditions. The standard ensures these motors meet specific performance, safety, and durability criteria for use in factories, ports, and construction sites.
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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.