Recently, the State Administration for Market Regulation conducted sampling testing on our YBX4 series high-efficiency explosion-proof three-phase asynchronous motors, and the inspection department conducted testing according to GB/T 3836.1-2021 "Explosive Atmospheres - Part 1: General Requirements for Equipment", GB/T 3836.2-2021 "Explosive Atmospheres - Part 2: Devices Protected by Flameproof Enclosures" d " The standard requirements of "Preparation" and "Implementation Rules for National Supervision and Random Inspection of Explosion-proof Motor Product Quality" include impact resistance test, sealing test, mechanical strength test, and shell withstand voltage test Eight projects including the experiment were tested, and the test results all met national standards, successfully passing this supervision and random inspection.