This part of GB/T 21972 stipulates the type, basic parameters and dimensions, technical requirements, inspection rules, test methods, signs, packaging and maintenance of YZP series frequency conversion speed regulation three-phase asynchrons and metallurgy。
period requirements. This part applies to centrifugal fan-cooled three-phase asynchronous motors (hereinafter referred to as motors) for power transmission of various hoisting machinery and metallurgical auxiliary equipment powered by frequency converters.