Wholesale TEFC Squirrel Cage Motors with F Class Insulation and IEC Standard Mounting

We're looking at roughly 8-12 weeks lead time for the YE3 series right now, depending on the pole count and housing matrial you go with — cast iron takes a bit longer than aluminum, usually 2-4 weeks more. The mounting dimnesions are fully IEC compliant, so you won't run into retrofit headaches if you're swapping out an older Y series, and the frame sizes range from 56 to 355. For a typical order of 50 units or so, we'd quote FOB Shanghai, and the HS code is 8501520000.

Basically, what it does is convert electrical energy into mechancial torque through that squirrel-cage rotor design, and it's built for constant speed application like pumps or compressors. The F class insulation gives you a 155°C thermal margin, which is better than most B class motors you'll see in this price bracket, so it handles overloads a bit more gracefully. One detail that catches people off guard is the IP54 or IP55 casing protection — that's fine for dusty environments but not submersible, so don't try it in a washdown scenario.

Starting torque is actually pretty solid on these, about 2.0 to 2.3 times rated torque depending on the pole configuration — 4P is the sweet spot for most buyers. You'll need to decide between direct-on-line or Y-Δ starting, but that's a matter of your grid capacity and load inertia rather than the motor itself. Ambient temp limit is -15°C to 40°C, and altitude ≤1000 meters, though we've had customers push that to 1500 meters with a derating factor.

We usually have stock on 4P and 6P models in the common sizes (0.75kW to 315kW), but 2P and 10P are a bit more niche and might need a production run. The cooling method is IC411, which is that external fan on the back of the motor — it's self-ventilated, so don't block the airflow or you'll get hot spots. Anyway, the S1 duty rating means it can run continuously at full load without a cooldown cycle, which matters for conveyor systems or blowers.

One thing that comes up when people compare these to the Y2 series is the efficiency class — YE3 is IE3, so it's roughly 2-4% more efficient than older designs, and that adds up on a 24/7 operation. The motor is designed for 380V at 50Hz or 60Hz (we can customize the voltge), and the number of stator poles gives you different no-load speeds — 3000 rpm for 2P, 1500 for 4P, and so on. Just note that if you're at 60Hz, the speed increases by about 20%, and the torque drops slightly, so your load profile needs to match.

230 units was our last container shipment to a European distributor, and they had a mix of 4P and 8P with aluminun housings — that kept the weight manageable for their pallet stack. We'll include a COA with each batch, and the CCC and CE certifications are current, though ISO9001 is on the facility, not per-unit. One thing nobody asks but should: any salt spray in your environment? We can bump the paint spec for coastal areas at no extra cost, but you have to specify it upfront.