Industrial Standard Motor
Panbu ElectricWE4 Series Low-Voltage Three-Phase Asynchronous Motors
The WE4 series represents Wolong's next-generation low-voltage three-phase asynchronous motors designed for the high-efficiency market. Available in frame sizes 80 to 400, these motors offer rated power from 0.55 to 400 kW and support rated voltages of 380V, 400V, 660V, and 690V at frequencies of 50Hz and 60Hz. Constructed with premium-grade cold-rolled silicon steel, extended iron cores, and low-loss windings, coupled with an optimized cooling airflow design, they achieve IE4 efficiency or higher, with select models meeting IE5 standards. This helps customers reduce total cost of ownership through lower energy consumption. The compact motor design features end shields and frames made from high-strength cast iron, while the bearing system is engineered for long service life. A standard relubrication device (for larger frame sizes) ensures reliable operation even in harsh environments such as dusty or humid conditions.
Technical Specifications
- Housing Number80~400
- Rated Power0.55~400 kW
- Rated Voltage380V/400V/660V/690V
- Rated Frequency50Hz/60Hz
- Jisu2/4/6/8 Extreme
- Energy Efficiency RatingIE4, IE5 (by specification)
- Ingress Protection RatingIP55 (optional IP56/IP65)
- Insulation ClassF class, temperature rise evaluated according to B class.
- Cooling MethodIC411 Totally Enclosed Fan-Cooled
- Installation MethodB3, B5, B35, B14, etc.
- Work scheduleS1 Continuous Duty
- bearingLarge base comes standard with a re-lubrication structure
Key Advantages
Ultra-High Efficiency: High-grade silicon steel and extended core design significantly reduce losses, achieving energy efficiency of IE4/IE5.
Lower temperature rise: Optimized airflow and cooling fin layout for lower operating temperatures and extended insulation lifespan.
Long-life bearings: Bearing systems selected for L10 long-life rating; large frames equipped with oil injection and drainage structures.
Rugged design: IP55 protection and high-quality sealing for reliable performance in dusty, humid environments.
Inverter-friendly: Optional enhanced insulation and independent cooling; supports wide-range variable frequency speed control.
Easy to maintain: Modular end caps and standardized junction boxes for efficient inspection and replacement.
Use Cases
High-Efficiency Fan and Pump Systems
Air compressors and refrigeration equipment
Conveying and Lifting Machinery
Metallurgical and Mining Equipment
Chemical Process Pumps and Agitation Equipment
Data Center Cooling System
WE4 Series Low-Voltage Three-Phase Induction Motor Selection Parameters (380V/50Hz Representative Models)
← Swipe left or right to view full parameters; first column is fixed
| Model | Housing Size | Power (kW) | JiShu | Speed (r/min) | Current (A) | Efficiency (%) | Power Factor | Ingress Protection Rating | Energy Efficiency Rating |
|---|---|---|---|---|---|---|---|---|---|
| WE4-80M1-2 | 80 | 0.75 | 2 | 2830 | 1.83 | 77.4 | 0.83 | IP5 | IE4 |
| WE4-100L1-4 | 100 | 2.2 | 4 | 1430 | 4.85 | 85.9 | 0.81 | IP5 | IE4 |
| WE4-132M-4 | 132 | 7.5 | 4 | 1450 | 15.4 | 89.7 | 0.83 | IP5 | IE4 |
| WE4-160L-4 | 160 | 15 | 4 | 1465 | 28.8 | 91.9 | 0.85 | IP5 | IE4 |
| WE4-200L-4 | 200 | 30 | 4 | 1475 | 55.4 | 93.6 | 0.86 | IP5 | IE4 |
| WE4-250M-4 | 250 | 55 | 4 | 1482 | 100 | 94.6 | 0.87 | IP5 | IE5 |
| WE4-280M-4 | 280 | 90 | 4 | 1487 | 163 | 95.4 | 0.88 | IP5 | IE5 |
| WE4-315L1-4 | 315 | 160 | 4 | 1490 | 286 | 95.9 | 0.88 | IP5 | IE5 |
| WE4-355L2-4 | 355 | 315 | 4 | 1492 | 559 | 96.4 | 0.89 | IP5 | IE5 |
| WE4-400L1-4 | 400 | 400 | 4 | 1493 | 706 | 96.6 | 0.89 | IP5 | IE5 |
| WE4-315S-6 | 315 | 75 | 6 | 990 | 141 | 94.9 | 0.86 | IP5 | IE4 |
| WE4-355M2-6 | 355 | 200 | 6 | 993 | 370 | 95.9 | 0.87 | IP5 | IE5 |
| WE4-400-8 | 400 | 250 | 8 | 743 | 486 | 95.4 | 0.83 | IP5 | IE4 |
Download
WE4 Series Low-Voltage Three-Phase Asynchronous MotorsProduct Catalog (PDF) – Download for full technical specs, installation dimensions, and selection tables.
WE4 Series Low-Voltage Three-Phase Asynchronous MotorsProduct Catalog
PDF Document · Free Public Download
Industrial standard motors
WE3 Series Low-Voltage Three-Phase Induction Motors
The Wolong WE3 series high-efficiency low-voltage three-phase asynchronous motor, frame sizes 63 to 355, power ratings from 0.12 to 315 kW, with energy efficiency levels covering IE3/IE4. Compact design and stable operation, suitable for general industrial loads such as fans, pumps, and compressors.
WE5 Series Low-Voltage Three-Phase Induction Motors
The Wolong WE5 Series flagship high-efficiency low-voltage three-phase asynchronous motor, frame sizes 90 to 450, power range 1.1 to 560 kW, with IE5 efficiency rating. It features integrated smart temperature sensing and condition monitoring interfaces, designed for demanding industrial applications requiring high load rates and long-term operation.
WEBP Series Variable Frequency Drive Three-Phase Asynchronous Motors
Wolong WEBP Series Variable Frequency Drive Three-Phase Induction Motors, frame sizes H80~H355, power ratings 0.18~375kW, 2/4/6/8/10 poles, with independent forced-air cooling (IC416). Energy efficiency covers IE2~IE5 (WEBP2/WEBP3/WEBP4/WEBP5 sub-series), offering a wide speed range, low temperature rise, and reliable operation. Ideal for constant torque and constant power VFD applications.
Related Case Studies
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Panpu SRM Switched Reluctance Drive System Case Study | Rubber & Plastic Products Factory | Energy-saving Retrofit of Injection Molding Workshop Oil Pumps with Process-Stage Speed Control
The 12 injection molding machines in the rubber and plastic products factory's injection workshop originally used an asynchronous motor + variable pump configuration, resulting in significant energy loss via overflow during the holding pressure and cooling stages. The project has now switched to Panpu SRM switch reluctance motor drive systems for the oil pumps, enabling speed-adjusted oil supply based on process stages.
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Panpu SRM Switched Reluctance Motor Drive System Case Study | Oilfield Production Zone | Beam Pump Load Speed Regulation and Soft Start Retrofit
In a certain oilfield's production zone, 37 beam pumping units equipped with asynchronous motors have operated under light loads for an extended period, resulting in frequent start-stop cycles and high inrush currents. The project replaced the entire system with Panpu SRM series switched reluctance motor drive systems, enabling speed control based on the pumping unit load curve and soft starting.
Energy Saving33%Food & Beverage
Wolong EC Fan Energy Retrofit Case | Yichang Ziquan Beverage Industry Co., Ltd. | Permanent Magnet Direct-Drive EC Fan Energy Retrofit for Workshop Air Handling Units
Yichang Ziquan Beverage Industry Co., Ltd. upgraded the air handling units in Production Lines 1 and 2 from standard impellers with belt drives and three-phase asynchronous motors to卧龙 permanent magnet rotor synchronous motor direct drive, smart variable frequency systems, and high-efficiency EC fan systems. Annual power consumption dropped from 311,256kWh to 209,088kWh, achieving an overall energy savings rate of approximately 32.8%.
Cases are automatically linked by product series and application industry, allowing you to view retrofit details and performance data for similar operating conditions.
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