Import Ac Electric Motors — Buy in Bulk from Supplier in China

The YVFZ series from Shanghai Electrical Machinery Group is a metallurgical and hoisting variable frequency speed regulating three-phase asynchronous motor, built to Chinese standard GB755 and IEC conventions. It runs at 380V for frame sizes 400-450mm, and 660V for the larger 500-560mm frames, with a rated frequency of 50Hz and F-class insulation. The motor employs IC416 cooling via an independent axial or centrifugal fan, with the auxiliary fan itself fed by three-phase 380V supply.

The frame construction is IMB3 foot-mounted, suited to heavy industrial bases common in steel mills and crane installations. Protection is rated at IP54 against dust and water ingress, adequate for the hot, particulate-laden atmospheres of metallurgical plants. The duty cycle is specified as S3-40 percent for lifting and metallurgy, indicating intermittent periodic operation with 40 percent load duration and rest periods to manage thermal load.

Buyers for this motor are typically crane OEMs, steel-rolling mill operators, and heavy-lift equipment refurbishers in developing industrial markets. The rated overload capacity of 150 percent current for one minute at rated voltage and frequency suits peak-starting or shock-load scenarios in hoist drives. Altitude rating is limited to 1000m; buyers at higher elevations must derate or confirm with the supplier. The independent fan arrangement allows continuous-speed operation below base speed without overheating, a critical feature for variable-frequency drive applications in metallurgy.

Shanghai Electrical Machinery Group lists its location in Shanghai, China, though the provided address data is fragmented and repeats city and country fields without street-level detail. The supplier holds a 'harbor' trust tier, which is a platform-assigned classification rather than an independent certification. Notably, the response rate is recorded at 0.00 percent with an average response time of zero hours, indicating no responsiveness data is available; buyers should treat initial contact as unverified and expect potential delays in quotation or sample requests.

The company profile visible in this listing offers no stated history, employee count, revenue figures, factory size, or named client references. What is confirmed is that the supplier specialises in heavy-industrial electric motors, specifically the YVFZ series for metallurgical and hoisting applications, and builds to Chinese national standard GB755 aligned with IEC. Buyers are advised to request directly: years in operation, ISO 9001 or IECEx certificate copies, reference installations in metallurgical plants, and whether the 400-560mm frames sizes are stocked or built to order.